Annotation of /tags/mkinitrd-6_1_11/busybox/shell/msh.c
Parent Directory
|
Revision Log
Revision 816 -
(hide annotations)
(download)
Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/shell/msh.c
File MIME type: text/plain
File size: 104947 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/shell/msh.c
File MIME type: text/plain
File size: 104947 byte(s)
-updated to busybox-1.13.4
1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * Minix shell port for busybox | ||
4 | * | ||
5 | * This version of the Minix shell was adapted for use in busybox | ||
6 | * by Erik Andersen <andersen@codepoet.org> | ||
7 | * | ||
8 | * - backtick expansion did not work properly | ||
9 | * Jonas Holmberg <jonas.holmberg@axis.com> | ||
10 | * Robert Schwebel <r.schwebel@pengutronix.de> | ||
11 | * Erik Andersen <andersen@codepoet.org> | ||
12 | * | ||
13 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. | ||
14 | */ | ||
15 | |||
16 | niro | 816 | #include <sys/times.h> |
17 | niro | 532 | #include <setjmp.h> |
18 | |||
19 | niro | 816 | #ifdef STANDALONE |
20 | # ifndef _GNU_SOURCE | ||
21 | # define _GNU_SOURCE | ||
22 | # endif | ||
23 | # include <sys/types.h> | ||
24 | # include <sys/stat.h> | ||
25 | # include <sys/wait.h> | ||
26 | # include <signal.h> | ||
27 | # include <stdio.h> | ||
28 | # include <stdlib.h> | ||
29 | # include <unistd.h> | ||
30 | # include <string.h> | ||
31 | # include <errno.h> | ||
32 | # include <dirent.h> | ||
33 | # include <fcntl.h> | ||
34 | # include <ctype.h> | ||
35 | # include <assert.h> | ||
36 | # define bb_dev_null "/dev/null" | ||
37 | # define DEFAULT_SHELL "/proc/self/exe" | ||
38 | # define CONFIG_BUSYBOX_EXEC_PATH "/proc/self/exe" | ||
39 | # define bb_banner "busybox standalone" | ||
40 | # define ENABLE_FEATURE_SH_STANDALONE 0 | ||
41 | # define bb_msg_memory_exhausted "memory exhausted" | ||
42 | # define xmalloc(size) malloc(size) | ||
43 | # define msh_main(argc,argv) main(argc,argv) | ||
44 | # define safe_read(fd,buf,count) read(fd,buf,count) | ||
45 | # define nonblock_safe_read(fd,buf,count) read(fd,buf,count) | ||
46 | # define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1]) | ||
47 | # define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1]) | ||
48 | # define NORETURN __attribute__ ((__noreturn__)) | ||
49 | static int find_applet_by_name(const char *applet) | ||
50 | { | ||
51 | return -1; | ||
52 | } | ||
53 | static char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) | ||
54 | { | ||
55 | unsigned i, out, res; | ||
56 | assert(sizeof(unsigned) == 4); | ||
57 | if (buflen) { | ||
58 | out = 0; | ||
59 | for (i = 1000000000; i; i /= 10) { | ||
60 | res = n / i; | ||
61 | if (res || out || i == 1) { | ||
62 | if (!--buflen) break; | ||
63 | out++; | ||
64 | n -= res*i; | ||
65 | *buf++ = '0' + res; | ||
66 | } | ||
67 | } | ||
68 | } | ||
69 | return buf; | ||
70 | } | ||
71 | static char *itoa_to_buf(int n, char *buf, unsigned buflen) | ||
72 | { | ||
73 | if (buflen && n < 0) { | ||
74 | n = -n; | ||
75 | *buf++ = '-'; | ||
76 | buflen--; | ||
77 | } | ||
78 | return utoa_to_buf((unsigned)n, buf, buflen); | ||
79 | } | ||
80 | static char local_buf[12]; | ||
81 | static char *itoa(int n) | ||
82 | { | ||
83 | *(itoa_to_buf(n, local_buf, sizeof(local_buf))) = '\0'; | ||
84 | return local_buf; | ||
85 | } | ||
86 | #else | ||
87 | # include "busybox.h" /* for applet_names */ | ||
88 | #endif | ||
89 | niro | 532 | |
90 | niro | 816 | //#define MSHDEBUG 4 |
91 | niro | 532 | |
92 | #ifdef MSHDEBUG | ||
93 | niro | 816 | static int mshdbg = MSHDEBUG; |
94 | niro | 532 | |
95 | niro | 816 | #define DBGPRINTF(x) if (mshdbg > 0) printf x |
96 | #define DBGPRINTF0(x) if (mshdbg > 0) printf x | ||
97 | #define DBGPRINTF1(x) if (mshdbg > 1) printf x | ||
98 | #define DBGPRINTF2(x) if (mshdbg > 2) printf x | ||
99 | #define DBGPRINTF3(x) if (mshdbg > 3) printf x | ||
100 | #define DBGPRINTF4(x) if (mshdbg > 4) printf x | ||
101 | #define DBGPRINTF5(x) if (mshdbg > 5) printf x | ||
102 | #define DBGPRINTF6(x) if (mshdbg > 6) printf x | ||
103 | #define DBGPRINTF7(x) if (mshdbg > 7) printf x | ||
104 | #define DBGPRINTF8(x) if (mshdbg > 8) printf x | ||
105 | #define DBGPRINTF9(x) if (mshdbg > 9) printf x | ||
106 | niro | 532 | |
107 | niro | 816 | static int mshdbg_rc = 0; |
108 | niro | 532 | |
109 | niro | 816 | #define RCPRINTF(x) if (mshdbg_rc) printf x |
110 | niro | 532 | |
111 | #else | ||
112 | |||
113 | #define DBGPRINTF(x) | ||
114 | niro | 816 | #define DBGPRINTF0(x) ((void)0) |
115 | #define DBGPRINTF1(x) ((void)0) | ||
116 | #define DBGPRINTF2(x) ((void)0) | ||
117 | #define DBGPRINTF3(x) ((void)0) | ||
118 | #define DBGPRINTF4(x) ((void)0) | ||
119 | #define DBGPRINTF5(x) ((void)0) | ||
120 | #define DBGPRINTF6(x) ((void)0) | ||
121 | #define DBGPRINTF7(x) ((void)0) | ||
122 | #define DBGPRINTF8(x) ((void)0) | ||
123 | #define DBGPRINTF9(x) ((void)0) | ||
124 | niro | 532 | |
125 | niro | 816 | #define RCPRINTF(x) ((void)0) |
126 | niro | 532 | |
127 | niro | 816 | #endif /* MSHDEBUG */ |
128 | niro | 532 | |
129 | |||
130 | niro | 816 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT |
131 | niro | 532 | # define DEFAULT_ROOT_PROMPT "\\u:\\w> " |
132 | # define DEFAULT_USER_PROMPT "\\u:\\w$ " | ||
133 | #else | ||
134 | # define DEFAULT_ROOT_PROMPT "# " | ||
135 | # define DEFAULT_USER_PROMPT "$ " | ||
136 | #endif | ||
137 | |||
138 | |||
139 | /* -------- sh.h -------- */ | ||
140 | /* | ||
141 | * shell | ||
142 | */ | ||
143 | |||
144 | niro | 816 | #define LINELIM 2100 |
145 | #define NPUSH 8 /* limit to input nesting */ | ||
146 | niro | 532 | |
147 | #undef NOFILE | ||
148 | niro | 816 | #define NOFILE 20 /* Number of open files */ |
149 | #define NUFILE 10 /* Number of user-accessible files */ | ||
150 | #define FDBASE 10 /* First file usable by Shell */ | ||
151 | niro | 532 | |
152 | /* | ||
153 | * values returned by wait | ||
154 | */ | ||
155 | niro | 816 | #define WAITSIG(s) ((s) & 0177) |
156 | #define WAITVAL(s) (((s) >> 8) & 0377) | ||
157 | #define WAITCORE(s) (((s) & 0200) != 0) | ||
158 | niro | 532 | |
159 | /* | ||
160 | * library and system definitions | ||
161 | */ | ||
162 | niro | 816 | typedef void xint; /* base type of jmp_buf, for not broken compilers */ |
163 | niro | 532 | |
164 | /* | ||
165 | * shell components | ||
166 | */ | ||
167 | #define NOBLOCK ((struct op *)NULL) | ||
168 | #define NOWORD ((char *)NULL) | ||
169 | #define NOWORDS ((char **)NULL) | ||
170 | #define NOPIPE ((int *)NULL) | ||
171 | |||
172 | /* | ||
173 | niro | 816 | * redirection |
174 | */ | ||
175 | struct ioword { | ||
176 | smallint io_flag; /* action (below) */ | ||
177 | int io_fd; /* fd affected */ | ||
178 | char *io_name; /* file name */ | ||
179 | }; | ||
180 | |||
181 | #define IOREAD 1 /* < */ | ||
182 | #define IOHERE 2 /* << (here file) */ | ||
183 | #define IOWRITE 4 /* > */ | ||
184 | #define IOCAT 8 /* >> */ | ||
185 | #define IOXHERE 16 /* ${}, ` in << */ | ||
186 | #define IODUP 32 /* >&digit */ | ||
187 | #define IOCLOSE 64 /* >&- */ | ||
188 | |||
189 | #define IODEFAULT (-1) /* "default" IO fd */ | ||
190 | |||
191 | |||
192 | /* | ||
193 | niro | 532 | * Description of a command or an operation on commands. |
194 | * Might eventually use a union. | ||
195 | */ | ||
196 | struct op { | ||
197 | niro | 816 | smallint op_type; /* operation type, see Txxxx below */ |
198 | char **op_words; /* arguments to a command */ | ||
199 | struct ioword **ioact; /* IO actions (eg, < > >>) */ | ||
200 | niro | 532 | struct op *left; |
201 | struct op *right; | ||
202 | niro | 816 | char *str; /* identifier for case and for */ |
203 | niro | 532 | }; |
204 | |||
205 | niro | 816 | #define TCOM 1 /* command */ |
206 | #define TPAREN 2 /* (c-list) */ | ||
207 | #define TPIPE 3 /* a | b */ | ||
208 | #define TLIST 4 /* a [&;] b */ | ||
209 | #define TOR 5 /* || */ | ||
210 | #define TAND 6 /* && */ | ||
211 | #define TFOR 7 | ||
212 | #define TDO 8 | ||
213 | #define TCASE 9 | ||
214 | #define TIF 10 | ||
215 | #define TWHILE 11 | ||
216 | #define TUNTIL 12 | ||
217 | #define TELIF 13 | ||
218 | #define TPAT 14 /* pattern in case */ | ||
219 | #define TBRACE 15 /* {c-list} */ | ||
220 | #define TASYNC 16 /* c & */ | ||
221 | niro | 532 | /* Added to support "." file expansion */ |
222 | niro | 816 | #define TDOT 17 |
223 | niro | 532 | |
224 | /* Strings for names to make debug easier */ | ||
225 | #ifdef MSHDEBUG | ||
226 | static const char *const T_CMD_NAMES[] = { | ||
227 | "PLACEHOLDER", | ||
228 | "TCOM", | ||
229 | "TPAREN", | ||
230 | "TPIPE", | ||
231 | "TLIST", | ||
232 | "TOR", | ||
233 | "TAND", | ||
234 | "TFOR", | ||
235 | "TDO", | ||
236 | "TCASE", | ||
237 | "TIF", | ||
238 | "TWHILE", | ||
239 | "TUNTIL", | ||
240 | "TELIF", | ||
241 | "TPAT", | ||
242 | "TBRACE", | ||
243 | "TASYNC", | ||
244 | "TDOT", | ||
245 | }; | ||
246 | #endif | ||
247 | |||
248 | niro | 816 | #define AREASIZE (90000) |
249 | niro | 532 | |
250 | /* | ||
251 | * flags to control evaluation of words | ||
252 | */ | ||
253 | niro | 816 | #define DOSUB 1 /* interpret $, `, and quotes */ |
254 | #define DOBLANK 2 /* perform blank interpretation */ | ||
255 | #define DOGLOB 4 /* interpret [?* */ | ||
256 | #define DOKEY 8 /* move words with `=' to 2nd arg. list */ | ||
257 | #define DOTRIM 16 /* trim resulting string */ | ||
258 | niro | 532 | |
259 | niro | 816 | #define DOALL (DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM) |
260 | niro | 532 | |
261 | |||
262 | struct brkcon { | ||
263 | jmp_buf brkpt; | ||
264 | struct brkcon *nextlev; | ||
265 | }; | ||
266 | |||
267 | |||
268 | niro | 816 | static smallint trapset; /* trap pending (signal number) */ |
269 | niro | 532 | |
270 | niro | 816 | static smallint yynerrs; /* yacc (flag) */ |
271 | niro | 532 | |
272 | niro | 816 | /* moved to G: static char line[LINELIM]; */ |
273 | niro | 532 | |
274 | niro | 816 | #if ENABLE_FEATURE_EDITING |
275 | static char *current_prompt; | ||
276 | static line_input_t *line_input_state; | ||
277 | #endif | ||
278 | niro | 532 | |
279 | |||
280 | /* | ||
281 | * other functions | ||
282 | */ | ||
283 | niro | 816 | static const char *rexecve(char *c, char **v, char **envp); |
284 | niro | 532 | static char *evalstr(char *cp, int f); |
285 | static char *putn(int n); | ||
286 | static char *unquote(char *as); | ||
287 | static int rlookup(char *n); | ||
288 | static struct wdblock *glob(char *cp, struct wdblock *wb); | ||
289 | static int my_getc(int ec); | ||
290 | static int subgetc(char ec, int quoted); | ||
291 | static char **makenv(int all, struct wdblock *wb); | ||
292 | static char **eval(char **ap, int f); | ||
293 | static int setstatus(int s); | ||
294 | static int waitfor(int lastpid, int canintr); | ||
295 | |||
296 | static void onintr(int s); /* SIGINT handler */ | ||
297 | |||
298 | static int newenv(int f); | ||
299 | static void quitenv(void); | ||
300 | static void next(int f); | ||
301 | static void setdash(void); | ||
302 | static void onecommand(void); | ||
303 | static void runtrap(int i); | ||
304 | |||
305 | |||
306 | /* -------- area stuff -------- */ | ||
307 | |||
308 | niro | 816 | #define REGSIZE sizeof(struct region) |
309 | #define GROWBY (256) | ||
310 | /* #define SHRINKBY (64) */ | ||
311 | #undef SHRINKBY | ||
312 | #define FREE (32767) | ||
313 | #define BUSY (0) | ||
314 | #define ALIGN (sizeof(int)-1) | ||
315 | niro | 532 | |
316 | |||
317 | struct region { | ||
318 | struct region *next; | ||
319 | int area; | ||
320 | }; | ||
321 | |||
322 | |||
323 | /* -------- grammar stuff -------- */ | ||
324 | typedef union { | ||
325 | char *cp; | ||
326 | char **wp; | ||
327 | int i; | ||
328 | struct op *o; | ||
329 | } YYSTYPE; | ||
330 | |||
331 | niro | 816 | #define WORD 256 |
332 | #define LOGAND 257 | ||
333 | #define LOGOR 258 | ||
334 | #define BREAK 259 | ||
335 | #define IF 260 | ||
336 | #define THEN 261 | ||
337 | #define ELSE 262 | ||
338 | #define ELIF 263 | ||
339 | #define FI 264 | ||
340 | #define CASE 265 | ||
341 | #define ESAC 266 | ||
342 | #define FOR 267 | ||
343 | #define WHILE 268 | ||
344 | #define UNTIL 269 | ||
345 | #define DO 270 | ||
346 | #define DONE 271 | ||
347 | #define IN 272 | ||
348 | niro | 532 | /* Added for "." file expansion */ |
349 | niro | 816 | #define DOT 273 |
350 | niro | 532 | |
351 | #define YYERRCODE 300 | ||
352 | |||
353 | /* flags to yylex */ | ||
354 | niro | 816 | #define CONTIN 01 /* skip new lines to complete command */ |
355 | niro | 532 | |
356 | static struct op *pipeline(int cf); | ||
357 | static struct op *andor(void); | ||
358 | static struct op *c_list(void); | ||
359 | static int synio(int cf); | ||
360 | static void musthave(int c, int cf); | ||
361 | static struct op *simple(void); | ||
362 | static struct op *nested(int type, int mark); | ||
363 | static struct op *command(int cf); | ||
364 | static struct op *dogroup(int onlydone); | ||
365 | static struct op *thenpart(void); | ||
366 | static struct op *elsepart(void); | ||
367 | static struct op *caselist(void); | ||
368 | static struct op *casepart(void); | ||
369 | static char **pattern(void); | ||
370 | static char **wordlist(void); | ||
371 | static struct op *list(struct op *t1, struct op *t2); | ||
372 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp); | ||
373 | static struct op *newtp(void); | ||
374 | static struct op *namelist(struct op *t); | ||
375 | static char **copyw(void); | ||
376 | static void word(char *cp); | ||
377 | static struct ioword **copyio(void); | ||
378 | static struct ioword *io(int u, int f, char *cp); | ||
379 | static int yylex(int cf); | ||
380 | static int collect(int c, int c1); | ||
381 | static int dual(int c); | ||
382 | static void diag(int ec); | ||
383 | static char *tree(unsigned size); | ||
384 | |||
385 | /* -------- var.h -------- */ | ||
386 | |||
387 | struct var { | ||
388 | char *value; | ||
389 | char *name; | ||
390 | struct var *next; | ||
391 | char status; | ||
392 | }; | ||
393 | |||
394 | #define COPYV 1 /* flag to setval, suggesting copy */ | ||
395 | #define RONLY 01 /* variable is read-only */ | ||
396 | #define EXPORT 02 /* variable is to be exported */ | ||
397 | #define GETCELL 04 /* name & value space was got with getcell */ | ||
398 | |||
399 | static int yyparse(void); | ||
400 | |||
401 | |||
402 | /* -------- io.h -------- */ | ||
403 | /* io buffer */ | ||
404 | struct iobuf { | ||
405 | niro | 816 | unsigned id; /* buffer id */ |
406 | char buf[512]; /* buffer */ | ||
407 | char *bufp; /* pointer into buffer */ | ||
408 | char *ebufp; /* pointer to end of buffer */ | ||
409 | niro | 532 | }; |
410 | |||
411 | /* possible arguments to an IO function */ | ||
412 | struct ioarg { | ||
413 | niro | 816 | const char *aword; |
414 | niro | 532 | char **awordlist; |
415 | niro | 816 | int afile; /* file descriptor */ |
416 | unsigned afid; /* buffer id */ | ||
417 | off_t afpos; /* file position */ | ||
418 | struct iobuf *afbuf; /* buffer for this file */ | ||
419 | niro | 532 | }; |
420 | |||
421 | /* an input generator's state */ | ||
422 | struct io { | ||
423 | int (*iofn) (struct ioarg *, struct io *); | ||
424 | struct ioarg *argp; | ||
425 | int peekc; | ||
426 | niro | 816 | char prev; /* previous character read by readc() */ |
427 | char nlcount; /* for `'s */ | ||
428 | char xchar; /* for `'s */ | ||
429 | char task; /* reason for pushed IO */ | ||
430 | niro | 532 | }; |
431 | niro | 816 | /* ->task: */ |
432 | #define XOTHER 0 /* none of the below */ | ||
433 | #define XDOLL 1 /* expanding ${} */ | ||
434 | #define XGRAVE 2 /* expanding `'s */ | ||
435 | #define XIO 3 /* file IO */ | ||
436 | niro | 532 | |
437 | |||
438 | /* | ||
439 | * input generators for IO structure | ||
440 | */ | ||
441 | static int nlchar(struct ioarg *ap); | ||
442 | static int strchar(struct ioarg *ap); | ||
443 | static int qstrchar(struct ioarg *ap); | ||
444 | static int filechar(struct ioarg *ap); | ||
445 | static int herechar(struct ioarg *ap); | ||
446 | static int linechar(struct ioarg *ap); | ||
447 | static int gravechar(struct ioarg *ap, struct io *iop); | ||
448 | static int qgravechar(struct ioarg *ap, struct io *iop); | ||
449 | static int dolchar(struct ioarg *ap); | ||
450 | static int wdchar(struct ioarg *ap); | ||
451 | static void scraphere(void); | ||
452 | static void freehere(int area); | ||
453 | static void gethere(void); | ||
454 | static void markhere(char *s, struct ioword *iop); | ||
455 | static int herein(char *hname, int xdoll); | ||
456 | static int run(struct ioarg *argp, int (*f) (struct ioarg *)); | ||
457 | |||
458 | |||
459 | static int eofc(void); | ||
460 | static int readc(void); | ||
461 | static void unget(int c); | ||
462 | static void ioecho(char c); | ||
463 | |||
464 | |||
465 | /* | ||
466 | * IO control | ||
467 | */ | ||
468 | static void pushio(struct ioarg *argp, int (*f) (struct ioarg *)); | ||
469 | niro | 816 | #define PUSHIO(what,arg,gen) ((temparg.what = (arg)), pushio(&temparg,(gen))) |
470 | niro | 532 | static int remap(int fd); |
471 | static int openpipe(int *pv); | ||
472 | static void closepipe(int *pv); | ||
473 | static struct io *setbase(struct io *ip); | ||
474 | |||
475 | /* -------- word.h -------- */ | ||
476 | |||
477 | #define NSTART 16 /* default number of words to allow for initially */ | ||
478 | |||
479 | struct wdblock { | ||
480 | short w_bsize; | ||
481 | short w_nword; | ||
482 | /* bounds are arbitrary */ | ||
483 | char *w_words[1]; | ||
484 | }; | ||
485 | |||
486 | static struct wdblock *addword(char *wd, struct wdblock *wb); | ||
487 | static struct wdblock *newword(int nw); | ||
488 | static char **getwords(struct wdblock *wb); | ||
489 | |||
490 | niro | 816 | /* -------- misc stuff -------- */ |
491 | niro | 532 | |
492 | niro | 816 | static int dolabel(struct op *t, char **args); |
493 | static int dohelp(struct op *t, char **args); | ||
494 | static int dochdir(struct op *t, char **args); | ||
495 | static int doshift(struct op *t, char **args); | ||
496 | static int dologin(struct op *t, char **args); | ||
497 | static int doumask(struct op *t, char **args); | ||
498 | static int doexec(struct op *t, char **args); | ||
499 | static int dodot(struct op *t, char **args); | ||
500 | static int dowait(struct op *t, char **args); | ||
501 | static int doread(struct op *t, char **args); | ||
502 | static int doeval(struct op *t, char **args); | ||
503 | static int dotrap(struct op *t, char **args); | ||
504 | static int dobreak(struct op *t, char **args); | ||
505 | static int doexit(struct op *t, char **args); | ||
506 | static int doexport(struct op *t, char **args); | ||
507 | static int doreadonly(struct op *t, char **args); | ||
508 | static int doset(struct op *t, char **args); | ||
509 | static int dotimes(struct op *t, char **args); | ||
510 | static int docontinue(struct op *t, char **args); | ||
511 | niro | 532 | |
512 | niro | 816 | static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp); |
513 | static int execute(struct op *t, int *pin, int *pout, int no_fork); | ||
514 | niro | 532 | static int iosetup(struct ioword *iop, int pipein, int pipeout); |
515 | static void brkset(struct brkcon *bc); | ||
516 | static int getsig(char *s); | ||
517 | static void setsig(int n, sighandler_t f); | ||
518 | static int getn(char *as); | ||
519 | static int brkcontin(char *cp, int val); | ||
520 | static void rdexp(char **wp, void (*f) (struct var *), int key); | ||
521 | static void badid(char *s); | ||
522 | static void varput(char *s, int out); | ||
523 | niro | 816 | static int expand(const char *cp, struct wdblock **wbp, int f); |
524 | niro | 532 | static char *blank(int f); |
525 | static int dollar(int quoted); | ||
526 | static int grave(int quoted); | ||
527 | static void globname(char *we, char *pp); | ||
528 | static char *generate(char *start1, char *end1, char *middle, char *end); | ||
529 | static int anyspcl(struct wdblock *wb); | ||
530 | static void readhere(char **name, char *s, int ec); | ||
531 | static int xxchar(struct ioarg *ap); | ||
532 | |||
533 | struct here { | ||
534 | char *h_tag; | ||
535 | niro | 816 | char h_dosub; |
536 | niro | 532 | struct ioword *h_iop; |
537 | struct here *h_next; | ||
538 | }; | ||
539 | |||
540 | niro | 816 | static const char *const signame[] = { |
541 | niro | 532 | "Signal 0", |
542 | "Hangup", | ||
543 | niro | 816 | NULL, /* interrupt */ |
544 | niro | 532 | "Quit", |
545 | "Illegal instruction", | ||
546 | "Trace/BPT trap", | ||
547 | "Abort", | ||
548 | "Bus error", | ||
549 | "Floating Point Exception", | ||
550 | "Killed", | ||
551 | "SIGUSR1", | ||
552 | "SIGSEGV", | ||
553 | "SIGUSR2", | ||
554 | niro | 816 | NULL, /* broken pipe */ |
555 | niro | 532 | "Alarm clock", |
556 | niro | 816 | "Terminated" |
557 | niro | 532 | }; |
558 | |||
559 | |||
560 | niro | 816 | typedef int (*builtin_func_ptr)(struct op *, char **); |
561 | niro | 532 | |
562 | struct builtincmd { | ||
563 | const char *name; | ||
564 | niro | 816 | builtin_func_ptr builtinfunc; |
565 | niro | 532 | }; |
566 | niro | 816 | |
567 | niro | 532 | static const struct builtincmd builtincmds[] = { |
568 | niro | 816 | { "." , dodot }, |
569 | { ":" , dolabel }, | ||
570 | { "break" , dobreak }, | ||
571 | { "cd" , dochdir }, | ||
572 | { "continue", docontinue }, | ||
573 | { "eval" , doeval }, | ||
574 | { "exec" , doexec }, | ||
575 | { "exit" , doexit }, | ||
576 | { "export" , doexport }, | ||
577 | { "help" , dohelp }, | ||
578 | { "login" , dologin }, | ||
579 | { "newgrp" , dologin }, | ||
580 | { "read" , doread }, | ||
581 | { "readonly", doreadonly }, | ||
582 | { "set" , doset }, | ||
583 | { "shift" , doshift }, | ||
584 | { "times" , dotimes }, | ||
585 | { "trap" , dotrap }, | ||
586 | { "umask" , doumask }, | ||
587 | { "wait" , dowait }, | ||
588 | { NULL , NULL }, | ||
589 | niro | 532 | }; |
590 | |||
591 | niro | 816 | static struct op *dowholefile(int /*, int*/); |
592 | niro | 532 | |
593 | niro | 816 | |
594 | niro | 532 | /* Globals */ |
595 | static char **dolv; | ||
596 | static int dolc; | ||
597 | niro | 816 | static uint8_t exstat; |
598 | static smallint gflg; /* (seems to be a parse error indicator) */ | ||
599 | static smallint interactive; /* Is this an interactive shell */ | ||
600 | static smallint execflg; | ||
601 | static smallint isbreak; /* "break" statement was seen */ | ||
602 | static int multiline; /* '\n' changed to ';' (counter) */ | ||
603 | static struct op *outtree; /* result from parser */ | ||
604 | niro | 532 | static xint *failpt; |
605 | static xint *errpt; | ||
606 | static struct brkcon *brklist; | ||
607 | static struct wdblock *wdlist; | ||
608 | static struct wdblock *iolist; | ||
609 | |||
610 | #ifdef MSHDEBUG | ||
611 | static struct var *mshdbg_var; | ||
612 | #endif | ||
613 | static struct var *vlist; /* dictionary */ | ||
614 | static struct var *homedir; /* home directory */ | ||
615 | static struct var *prompt; /* main prompt */ | ||
616 | static struct var *cprompt; /* continuation prompt */ | ||
617 | static struct var *path; /* search path for commands */ | ||
618 | static struct var *shell; /* shell to interpret command files */ | ||
619 | static struct var *ifs; /* field separators */ | ||
620 | |||
621 | niro | 816 | static int areanum; /* current allocation area */ |
622 | static smallint intr; /* interrupt pending (bool) */ | ||
623 | static smallint heedint = 1; /* heed interrupt signals (bool) */ | ||
624 | niro | 532 | static int inparse; |
625 | niro | 816 | static char *null = (char*)""; /* null value for variable */ |
626 | static void (*qflag)(int) = SIG_IGN; | ||
627 | niro | 532 | static int startl; |
628 | static int peeksym; | ||
629 | static int nlseen; | ||
630 | static int iounit = IODEFAULT; | ||
631 | static YYSTYPE yylval; | ||
632 | niro | 816 | static char *elinep; /* done in main(): = line + sizeof(line) - 5 */ |
633 | niro | 532 | |
634 | niro | 816 | static struct here *inhere; /* list of hear docs while parsing */ |
635 | static struct here *acthere; /* list of active here documents */ | ||
636 | static struct region *areabot; /* bottom of area */ | ||
637 | static struct region *areatop; /* top of area */ | ||
638 | static struct region *areanxt; /* starting point of scan */ | ||
639 | niro | 532 | static void *brktop; |
640 | static void *brkaddr; | ||
641 | |||
642 | niro | 816 | #define AFID_NOBUF (~0) |
643 | #define AFID_ID 0 | ||
644 | |||
645 | |||
646 | /* | ||
647 | * parsing & execution environment | ||
648 | */ | ||
649 | struct env { | ||
650 | char *linep; | ||
651 | struct io *iobase; | ||
652 | struct io *iop; | ||
653 | xint *errpt; /* void * */ | ||
654 | int iofd; | ||
655 | struct env *oenv; | ||
656 | niro | 532 | }; |
657 | |||
658 | |||
659 | niro | 816 | struct globals { |
660 | struct env global_env; | ||
661 | struct ioarg temparg; // = { .afid = AFID_NOBUF }; /* temporary for PUSHIO */ | ||
662 | unsigned bufid; // = AFID_ID; /* buffer id counter */ | ||
663 | char ourtrap[_NSIG + 1]; | ||
664 | char *trap[_NSIG + 1]; | ||
665 | struct iobuf sharedbuf; /* in main(): set to { AFID_NOBUF } */ | ||
666 | struct iobuf mainbuf; /* in main(): set to { AFID_NOBUF } */ | ||
667 | struct ioarg ioargstack[NPUSH]; | ||
668 | /* | ||
669 | * flags: | ||
670 | * -e: quit on error | ||
671 | * -k: look for name=value everywhere on command line | ||
672 | * -n: no execution | ||
673 | * -t: exit after reading and executing one command | ||
674 | * -v: echo as read | ||
675 | * -x: trace | ||
676 | * -u: unset variables net diagnostic | ||
677 | */ | ||
678 | char flags['z' - 'a' + 1]; | ||
679 | char filechar_cmdbuf[BUFSIZ]; | ||
680 | char line[LINELIM]; | ||
681 | char child_cmd[LINELIM]; | ||
682 | niro | 532 | |
683 | niro | 816 | struct io iostack[NPUSH]; |
684 | niro | 532 | |
685 | niro | 816 | char grave__var_name[LINELIM]; |
686 | char grave__alt_value[LINELIM]; | ||
687 | }; | ||
688 | |||
689 | #define G (*ptr_to_globals) | ||
690 | #define global_env (G.global_env ) | ||
691 | #define temparg (G.temparg ) | ||
692 | #define bufid (G.bufid ) | ||
693 | #define ourtrap (G.ourtrap ) | ||
694 | #define trap (G.trap ) | ||
695 | #define sharedbuf (G.sharedbuf ) | ||
696 | #define mainbuf (G.mainbuf ) | ||
697 | #define ioargstack (G.ioargstack ) | ||
698 | /* this looks weird, but is OK ... we index FLAG with 'a'...'z' */ | ||
699 | #define FLAG (G.flags - 'a' ) | ||
700 | #define filechar_cmdbuf (G.filechar_cmdbuf) | ||
701 | #define line (G.line ) | ||
702 | #define child_cmd (G.child_cmd ) | ||
703 | #define iostack (G.iostack ) | ||
704 | #define INIT_G() do { \ | ||
705 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ | ||
706 | global_env.linep = line; \ | ||
707 | global_env.iobase = iostack; \ | ||
708 | global_env.iop = iostack - 1; \ | ||
709 | global_env.iofd = FDBASE; \ | ||
710 | temparg.afid = AFID_NOBUF; \ | ||
711 | bufid = AFID_ID; \ | ||
712 | } while (0) | ||
713 | |||
714 | |||
715 | /* in substitution */ | ||
716 | #define INSUB() (global_env.iop->task == XGRAVE || global_env.iop->task == XDOLL) | ||
717 | |||
718 | #define RUN(what, arg, gen) ((temparg.what = (arg)), run(&temparg, (gen))) | ||
719 | |||
720 | #ifdef MSHDEBUG | ||
721 | static void print_tree(struct op *head) | ||
722 | niro | 532 | { |
723 | if (head == NULL) { | ||
724 | DBGPRINTF(("PRINT_TREE: no tree\n")); | ||
725 | return; | ||
726 | } | ||
727 | |||
728 | niro | 816 | DBGPRINTF(("NODE: %p, left %p, right %p\n", head, head->left, |
729 | niro | 532 | head->right)); |
730 | |||
731 | if (head->left) | ||
732 | print_tree(head->left); | ||
733 | |||
734 | if (head->right) | ||
735 | print_tree(head->right); | ||
736 | } | ||
737 | niro | 816 | #endif /* MSHDEBUG */ |
738 | niro | 532 | |
739 | |||
740 | /* | ||
741 | niro | 816 | * IO functions |
742 | niro | 532 | */ |
743 | niro | 816 | static void prs(const char *s) |
744 | { | ||
745 | if (*s) | ||
746 | write(STDERR_FILENO, s, strlen(s)); | ||
747 | } | ||
748 | niro | 532 | |
749 | niro | 816 | static void prn(unsigned u) |
750 | { | ||
751 | prs(itoa(u)); | ||
752 | } | ||
753 | niro | 532 | |
754 | niro | 816 | static void echo(char **wp) |
755 | niro | 532 | { |
756 | niro | 816 | int i; |
757 | niro | 532 | |
758 | niro | 816 | prs("+"); |
759 | for (i = 0; wp[i]; i++) { | ||
760 | if (i) | ||
761 | prs(" "); | ||
762 | prs(wp[i]); | ||
763 | } | ||
764 | prs("\n"); | ||
765 | } | ||
766 | niro | 532 | |
767 | niro | 816 | static void closef(int i) |
768 | { | ||
769 | if (i > 2) | ||
770 | close(i); | ||
771 | } | ||
772 | |||
773 | static void closeall(void) | ||
774 | { | ||
775 | int u; | ||
776 | |||
777 | for (u = NUFILE; u < NOFILE;) | ||
778 | close(u++); | ||
779 | } | ||
780 | |||
781 | |||
782 | /* fail but return to process next command */ | ||
783 | static void fail(void) NORETURN; | ||
784 | static void fail(void) | ||
785 | { | ||
786 | longjmp(failpt, 1); | ||
787 | /* NOTREACHED */ | ||
788 | } | ||
789 | |||
790 | /* abort shell (or fail in subshell) */ | ||
791 | static void leave(void) NORETURN; | ||
792 | static void leave(void) | ||
793 | { | ||
794 | DBGPRINTF(("LEAVE: leave called!\n")); | ||
795 | |||
796 | if (execflg) | ||
797 | fail(); | ||
798 | scraphere(); | ||
799 | freehere(1); | ||
800 | runtrap(0); | ||
801 | _exit(exstat); | ||
802 | /* NOTREACHED */ | ||
803 | } | ||
804 | |||
805 | static void warn(const char *s) | ||
806 | { | ||
807 | if (*s) { | ||
808 | prs(s); | ||
809 | if (!exstat) | ||
810 | exstat = 255; | ||
811 | niro | 532 | } |
812 | niro | 816 | prs("\n"); |
813 | if (FLAG['e']) | ||
814 | leave(); | ||
815 | } | ||
816 | |||
817 | static void err(const char *s) | ||
818 | { | ||
819 | warn(s); | ||
820 | if (FLAG['n']) | ||
821 | return; | ||
822 | if (!interactive) | ||
823 | leave(); | ||
824 | if (global_env.errpt) | ||
825 | longjmp(global_env.errpt, 1); | ||
826 | niro | 532 | closeall(); |
827 | niro | 816 | global_env.iop = global_env.iobase = iostack; |
828 | } | ||
829 | niro | 532 | |
830 | |||
831 | niro | 816 | /* -------- area.c -------- */ |
832 | niro | 532 | |
833 | niro | 816 | /* |
834 | * All memory between (char *)areabot and (char *)(areatop+1) is | ||
835 | * exclusively administered by the area management routines. | ||
836 | * It is assumed that sbrk() and brk() manipulate the high end. | ||
837 | */ | ||
838 | niro | 532 | |
839 | niro | 816 | #define sbrk(X) ({ \ |
840 | void * __q = (void *)-1; \ | ||
841 | if (brkaddr + (int)(X) < brktop) { \ | ||
842 | __q = brkaddr; \ | ||
843 | brkaddr += (int)(X); \ | ||
844 | } \ | ||
845 | __q; \ | ||
846 | }) | ||
847 | |||
848 | static void initarea(void) | ||
849 | { | ||
850 | brkaddr = xmalloc(AREASIZE); | ||
851 | brktop = brkaddr + AREASIZE; | ||
852 | |||
853 | while ((long) sbrk(0) & ALIGN) | ||
854 | sbrk(1); | ||
855 | areabot = (struct region *) sbrk(REGSIZE); | ||
856 | |||
857 | areabot->next = areabot; | ||
858 | areabot->area = BUSY; | ||
859 | areatop = areabot; | ||
860 | areanxt = areabot; | ||
861 | } | ||
862 | |||
863 | static char *getcell(unsigned nbytes) | ||
864 | { | ||
865 | int nregio; | ||
866 | struct region *p, *q; | ||
867 | int i; | ||
868 | |||
869 | if (nbytes == 0) { | ||
870 | puts("getcell(0)"); | ||
871 | abort(); | ||
872 | niro | 532 | } |
873 | niro | 816 | /* silly and defeats the algorithm */ |
874 | /* | ||
875 | * round upwards and add administration area | ||
876 | */ | ||
877 | nregio = (nbytes + (REGSIZE - 1)) / REGSIZE + 1; | ||
878 | p = areanxt; | ||
879 | for (;;) { | ||
880 | if (p->area > areanum) { | ||
881 | /* | ||
882 | * merge free cells | ||
883 | */ | ||
884 | while ((q = p->next)->area > areanum && q != areanxt) | ||
885 | p->next = q->next; | ||
886 | /* | ||
887 | * exit loop if cell big enough | ||
888 | */ | ||
889 | if (q >= p + nregio) | ||
890 | goto found; | ||
891 | } | ||
892 | p = p->next; | ||
893 | if (p == areanxt) | ||
894 | break; | ||
895 | } | ||
896 | i = nregio >= GROWBY ? nregio : GROWBY; | ||
897 | p = (struct region *) sbrk(i * REGSIZE); | ||
898 | if (p == (struct region *) -1) | ||
899 | return NULL; | ||
900 | p--; | ||
901 | if (p != areatop) { | ||
902 | puts("not contig"); | ||
903 | abort(); /* allocated areas are contiguous */ | ||
904 | } | ||
905 | q = p + i; | ||
906 | p->next = q; | ||
907 | p->area = FREE; | ||
908 | q->next = areabot; | ||
909 | q->area = BUSY; | ||
910 | areatop = q; | ||
911 | found: | ||
912 | /* | ||
913 | * we found a FREE area big enough, pointed to by 'p', and up to 'q' | ||
914 | */ | ||
915 | areanxt = p + nregio; | ||
916 | if (areanxt < q) { | ||
917 | /* | ||
918 | * split into requested area and rest | ||
919 | */ | ||
920 | if (areanxt + 1 > q) { | ||
921 | puts("OOM"); | ||
922 | abort(); /* insufficient space left for admin */ | ||
923 | } | ||
924 | areanxt->next = q; | ||
925 | areanxt->area = FREE; | ||
926 | p->next = areanxt; | ||
927 | } | ||
928 | p->area = areanum; | ||
929 | return (char *) (p + 1); | ||
930 | } | ||
931 | niro | 532 | |
932 | niro | 816 | static void freecell(char *cp) |
933 | { | ||
934 | struct region *p; | ||
935 | niro | 532 | |
936 | niro | 816 | p = (struct region *) cp; |
937 | if (p != NULL) { | ||
938 | p--; | ||
939 | if (p < areanxt) | ||
940 | areanxt = p; | ||
941 | p->area = FREE; | ||
942 | } | ||
943 | } | ||
944 | #define DELETE(obj) freecell((char *)obj) | ||
945 | niro | 532 | |
946 | niro | 816 | static void freearea(int a) |
947 | { | ||
948 | struct region *p, *top; | ||
949 | |||
950 | top = areatop; | ||
951 | for (p = areabot; p != top; p = p->next) | ||
952 | if (p->area >= a) | ||
953 | p->area = FREE; | ||
954 | } | ||
955 | |||
956 | static void setarea(char *cp, int a) | ||
957 | { | ||
958 | struct region *p; | ||
959 | |||
960 | p = (struct region *) cp; | ||
961 | if (p != NULL) | ||
962 | (p - 1)->area = a; | ||
963 | } | ||
964 | |||
965 | static int getarea(char *cp) | ||
966 | { | ||
967 | return ((struct region *) cp - 1)->area; | ||
968 | } | ||
969 | |||
970 | static void garbage(void) | ||
971 | { | ||
972 | struct region *p, *q, *top; | ||
973 | |||
974 | top = areatop; | ||
975 | for (p = areabot; p != top; p = p->next) { | ||
976 | if (p->area > areanum) { | ||
977 | while ((q = p->next)->area > areanum) | ||
978 | p->next = q->next; | ||
979 | areanxt = p; | ||
980 | } | ||
981 | niro | 532 | } |
982 | niro | 816 | #ifdef SHRINKBY |
983 | if (areatop >= q + SHRINKBY && q->area > areanum) { | ||
984 | brk((char *) (q + 1)); | ||
985 | q->next = areabot; | ||
986 | q->area = BUSY; | ||
987 | areatop = q; | ||
988 | } | ||
989 | niro | 532 | #endif |
990 | niro | 816 | } |
991 | niro | 532 | |
992 | niro | 816 | static void *get_space(int n) |
993 | { | ||
994 | char *cp; | ||
995 | niro | 532 | |
996 | niro | 816 | cp = getcell(n); |
997 | if (cp == NULL) | ||
998 | err("out of string space"); | ||
999 | return cp; | ||
1000 | } | ||
1001 | niro | 532 | |
1002 | niro | 816 | static char *strsave(const char *s, int a) |
1003 | { | ||
1004 | char *cp; | ||
1005 | niro | 532 | |
1006 | niro | 816 | cp = get_space(strlen(s) + 1); |
1007 | if (cp == NULL) { | ||
1008 | // FIXME: I highly doubt this is good. | ||
1009 | return (char*)""; | ||
1010 | } | ||
1011 | setarea(cp, a); | ||
1012 | strcpy(cp, s); | ||
1013 | return cp; | ||
1014 | } | ||
1015 | niro | 532 | |
1016 | |||
1017 | niro | 816 | /* -------- var.c -------- */ |
1018 | niro | 532 | |
1019 | niro | 816 | static int eqname(const char *n1, const char *n2) |
1020 | { | ||
1021 | for (; *n1 != '=' && *n1 != '\0'; n1++) | ||
1022 | if (*n2++ != *n1) | ||
1023 | return 0; | ||
1024 | return *n2 == '\0' || *n2 == '='; | ||
1025 | } | ||
1026 | niro | 532 | |
1027 | niro | 816 | static const char *findeq(const char *cp) |
1028 | { | ||
1029 | while (*cp != '\0' && *cp != '=') | ||
1030 | cp++; | ||
1031 | return cp; | ||
1032 | } | ||
1033 | |||
1034 | /* | ||
1035 | * Find the given name in the dictionary | ||
1036 | * and return its value. If the name was | ||
1037 | * not previously there, enter it now and | ||
1038 | * return a null value. | ||
1039 | */ | ||
1040 | static struct var *lookup(const char *n) | ||
1041 | { | ||
1042 | // FIXME: dirty hack | ||
1043 | static struct var dummy; | ||
1044 | |||
1045 | struct var *vp; | ||
1046 | const char *cp; | ||
1047 | char *xp; | ||
1048 | int c; | ||
1049 | |||
1050 | if (isdigit(*n)) { | ||
1051 | dummy.name = (char*)n; | ||
1052 | for (c = 0; isdigit(*n) && c < 1000; n++) | ||
1053 | c = c * 10 + *n - '0'; | ||
1054 | dummy.status = RONLY; | ||
1055 | dummy.value = (c <= dolc ? dolv[c] : null); | ||
1056 | return &dummy; | ||
1057 | niro | 532 | } |
1058 | |||
1059 | niro | 816 | for (vp = vlist; vp; vp = vp->next) |
1060 | if (eqname(vp->name, n)) | ||
1061 | return vp; | ||
1062 | niro | 532 | |
1063 | niro | 816 | cp = findeq(n); |
1064 | vp = get_space(sizeof(*vp)); | ||
1065 | if (vp == 0 || (vp->name = get_space((int) (cp - n) + 2)) == NULL) { | ||
1066 | dummy.name = dummy.value = (char*)""; | ||
1067 | return &dummy; | ||
1068 | niro | 532 | } |
1069 | |||
1070 | niro | 816 | xp = vp->name; |
1071 | while ((*xp = *n++) != '\0' && *xp != '=') | ||
1072 | xp++; | ||
1073 | *xp++ = '='; | ||
1074 | *xp = '\0'; | ||
1075 | setarea((char *) vp, 0); | ||
1076 | setarea((char *) vp->name, 0); | ||
1077 | vp->value = null; | ||
1078 | vp->next = vlist; | ||
1079 | vp->status = GETCELL; | ||
1080 | vlist = vp; | ||
1081 | return vp; | ||
1082 | } | ||
1083 | |||
1084 | /* | ||
1085 | * if name is not NULL, it must be | ||
1086 | * a prefix of the space `val', | ||
1087 | * and end with `='. | ||
1088 | * this is all so that exporting | ||
1089 | * values is reasonably painless. | ||
1090 | */ | ||
1091 | static void nameval(struct var *vp, const char *val, const char *name) | ||
1092 | { | ||
1093 | const char *cp; | ||
1094 | char *xp; | ||
1095 | int fl; | ||
1096 | |||
1097 | if (vp->status & RONLY) { | ||
1098 | xp = vp->name; | ||
1099 | while (*xp && *xp != '=') | ||
1100 | fputc(*xp++, stderr); | ||
1101 | err(" is read-only"); | ||
1102 | return; | ||
1103 | niro | 532 | } |
1104 | niro | 816 | fl = 0; |
1105 | if (name == NULL) { | ||
1106 | xp = get_space(strlen(vp->name) + strlen(val) + 2); | ||
1107 | if (xp == NULL) | ||
1108 | return; | ||
1109 | /* make string: name=value */ | ||
1110 | setarea(xp, 0); | ||
1111 | name = xp; | ||
1112 | cp = vp->name; | ||
1113 | while ((*xp = *cp++) != '\0' && *xp != '=') | ||
1114 | xp++; | ||
1115 | *xp++ = '='; | ||
1116 | strcpy(xp, val); | ||
1117 | val = xp; | ||
1118 | fl = GETCELL; | ||
1119 | } | ||
1120 | if (vp->status & GETCELL) | ||
1121 | freecell(vp->name); /* form new string `name=value' */ | ||
1122 | vp->name = (char*)name; | ||
1123 | vp->value = (char*)val; | ||
1124 | vp->status |= fl; | ||
1125 | } | ||
1126 | niro | 532 | |
1127 | niro | 816 | /* |
1128 | * give variable at `vp' the value `val'. | ||
1129 | */ | ||
1130 | static void setval(struct var *vp, const char *val) | ||
1131 | { | ||
1132 | nameval(vp, val, NULL); | ||
1133 | } | ||
1134 | |||
1135 | static void export(struct var *vp) | ||
1136 | { | ||
1137 | vp->status |= EXPORT; | ||
1138 | } | ||
1139 | |||
1140 | static void ronly(struct var *vp) | ||
1141 | { | ||
1142 | if (isalpha(vp->name[0]) || vp->name[0] == '_') /* not an internal symbol */ | ||
1143 | vp->status |= RONLY; | ||
1144 | } | ||
1145 | |||
1146 | static int isassign(const char *s) | ||
1147 | { | ||
1148 | unsigned char c; | ||
1149 | DBGPRINTF7(("ISASSIGN: enter, s=%s\n", s)); | ||
1150 | |||
1151 | c = *s; | ||
1152 | /* no isalpha() - we shouldn't use locale */ | ||
1153 | /* c | 0x20 - lowercase (Latin) letters */ | ||
1154 | if (c != '_' && (unsigned)((c|0x20) - 'a') > 25) | ||
1155 | /* not letter */ | ||
1156 | return 0; | ||
1157 | |||
1158 | while (1) { | ||
1159 | c = *++s; | ||
1160 | if (c == '=') | ||
1161 | return 1; | ||
1162 | if (c == '\0') | ||
1163 | return 0; | ||
1164 | if (c != '_' | ||
1165 | && (unsigned)(c - '0') > 9 /* not number */ | ||
1166 | && (unsigned)((c|0x20) - 'a') > 25 /* not letter */ | ||
1167 | ) { | ||
1168 | return 0; | ||
1169 | niro | 532 | } |
1170 | } | ||
1171 | niro | 816 | } |
1172 | niro | 532 | |
1173 | niro | 816 | static int assign(const char *s, int cf) |
1174 | { | ||
1175 | const char *cp; | ||
1176 | struct var *vp; | ||
1177 | niro | 532 | |
1178 | niro | 816 | DBGPRINTF7(("ASSIGN: enter, s=%s, cf=%d\n", s, cf)); |
1179 | |||
1180 | if (!isalpha(*s) && *s != '_') | ||
1181 | return 0; | ||
1182 | for (cp = s; *cp != '='; cp++) | ||
1183 | if (*cp == '\0' || (!isalnum(*cp) && *cp != '_')) | ||
1184 | return 0; | ||
1185 | vp = lookup(s); | ||
1186 | nameval(vp, ++cp, cf == COPYV ? NULL : s); | ||
1187 | if (cf != COPYV) | ||
1188 | vp->status &= ~GETCELL; | ||
1189 | return 1; | ||
1190 | } | ||
1191 | |||
1192 | static int checkname(char *cp) | ||
1193 | { | ||
1194 | DBGPRINTF7(("CHECKNAME: enter, cp=%s\n", cp)); | ||
1195 | |||
1196 | if (!isalpha(*cp++) && *(cp - 1) != '_') | ||
1197 | return 0; | ||
1198 | while (*cp) | ||
1199 | if (!isalnum(*cp++) && *(cp - 1) != '_') | ||
1200 | return 0; | ||
1201 | return 1; | ||
1202 | } | ||
1203 | |||
1204 | static void putvlist(int f, int out) | ||
1205 | { | ||
1206 | struct var *vp; | ||
1207 | |||
1208 | for (vp = vlist; vp; vp = vp->next) { | ||
1209 | if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) { | ||
1210 | if (vp->status & EXPORT) | ||
1211 | write(out, "export ", 7); | ||
1212 | if (vp->status & RONLY) | ||
1213 | write(out, "readonly ", 9); | ||
1214 | write(out, vp->name, (int) (findeq(vp->name) - vp->name)); | ||
1215 | write(out, "\n", 1); | ||
1216 | niro | 532 | } |
1217 | } | ||
1218 | niro | 816 | } |
1219 | niro | 532 | |
1220 | niro | 816 | |
1221 | /* | ||
1222 | * trap handling | ||
1223 | */ | ||
1224 | static void sig(int i) | ||
1225 | { | ||
1226 | trapset = i; | ||
1227 | signal(i, sig); | ||
1228 | niro | 532 | } |
1229 | |||
1230 | niro | 816 | static void runtrap(int i) |
1231 | { | ||
1232 | char *trapstr; | ||
1233 | |||
1234 | trapstr = trap[i]; | ||
1235 | if (trapstr == NULL) | ||
1236 | return; | ||
1237 | |||
1238 | if (i == 0) | ||
1239 | trap[i] = NULL; | ||
1240 | |||
1241 | RUN(aword, trapstr, nlchar); | ||
1242 | } | ||
1243 | |||
1244 | |||
1245 | niro | 532 | static void setdash(void) |
1246 | { | ||
1247 | char *cp; | ||
1248 | int c; | ||
1249 | char m['z' - 'a' + 1]; | ||
1250 | |||
1251 | cp = m; | ||
1252 | for (c = 'a'; c <= 'z'; c++) | ||
1253 | niro | 816 | if (FLAG[c]) |
1254 | niro | 532 | *cp++ = c; |
1255 | niro | 816 | *cp = '\0'; |
1256 | niro | 532 | setval(lookup("-"), m); |
1257 | } | ||
1258 | |||
1259 | static int newfile(char *s) | ||
1260 | { | ||
1261 | int f; | ||
1262 | |||
1263 | DBGPRINTF7(("NEWFILE: opening %s\n", s)); | ||
1264 | |||
1265 | niro | 816 | f = 0; |
1266 | niro | 532 | if (NOT_LONE_DASH(s)) { |
1267 | DBGPRINTF(("NEWFILE: s is %s\n", s)); | ||
1268 | niro | 816 | f = open(s, O_RDONLY); |
1269 | niro | 532 | if (f < 0) { |
1270 | prs(s); | ||
1271 | niro | 816 | err(": can't open"); |
1272 | niro | 532 | return 1; |
1273 | } | ||
1274 | niro | 816 | } |
1275 | niro | 532 | |
1276 | next(remap(f)); | ||
1277 | return 0; | ||
1278 | } | ||
1279 | |||
1280 | |||
1281 | niro | 816 | #ifdef UNUSED |
1282 | niro | 532 | struct op *scantree(struct op *head) |
1283 | { | ||
1284 | struct op *dotnode; | ||
1285 | |||
1286 | if (head == NULL) | ||
1287 | return NULL; | ||
1288 | |||
1289 | if (head->left != NULL) { | ||
1290 | dotnode = scantree(head->left); | ||
1291 | if (dotnode) | ||
1292 | return dotnode; | ||
1293 | } | ||
1294 | |||
1295 | if (head->right != NULL) { | ||
1296 | dotnode = scantree(head->right); | ||
1297 | if (dotnode) | ||
1298 | return dotnode; | ||
1299 | } | ||
1300 | |||
1301 | niro | 816 | if (head->op_words == NULL) |
1302 | niro | 532 | return NULL; |
1303 | |||
1304 | DBGPRINTF5(("SCANTREE: checking node %p\n", head)); | ||
1305 | |||
1306 | niro | 816 | if ((head->op_type != TDOT) && LONE_CHAR(head->op_words[0], '.')) { |
1307 | niro | 532 | DBGPRINTF5(("SCANTREE: dot found in node %p\n", head)); |
1308 | return head; | ||
1309 | } | ||
1310 | |||
1311 | return NULL; | ||
1312 | } | ||
1313 | niro | 816 | #endif |
1314 | niro | 532 | |
1315 | |||
1316 | static void onecommand(void) | ||
1317 | { | ||
1318 | int i; | ||
1319 | jmp_buf m1; | ||
1320 | |||
1321 | DBGPRINTF(("ONECOMMAND: enter, outtree=%p\n", outtree)); | ||
1322 | |||
1323 | niro | 816 | while (global_env.oenv) |
1324 | niro | 532 | quitenv(); |
1325 | |||
1326 | areanum = 1; | ||
1327 | freehere(areanum); | ||
1328 | freearea(areanum); | ||
1329 | garbage(); | ||
1330 | niro | 816 | wdlist = NULL; |
1331 | iolist = NULL; | ||
1332 | global_env.errpt = NULL; | ||
1333 | global_env.linep = line; | ||
1334 | niro | 532 | yynerrs = 0; |
1335 | multiline = 0; | ||
1336 | inparse = 1; | ||
1337 | intr = 0; | ||
1338 | execflg = 0; | ||
1339 | |||
1340 | niro | 816 | failpt = m1; |
1341 | setjmp(failpt); /* Bruce Evans' fix */ | ||
1342 | failpt = m1; | ||
1343 | if (setjmp(failpt) || yyparse() || intr) { | ||
1344 | niro | 532 | DBGPRINTF(("ONECOMMAND: this is not good.\n")); |
1345 | |||
1346 | niro | 816 | while (global_env.oenv) |
1347 | niro | 532 | quitenv(); |
1348 | scraphere(); | ||
1349 | if (!interactive && intr) | ||
1350 | leave(); | ||
1351 | inparse = 0; | ||
1352 | intr = 0; | ||
1353 | return; | ||
1354 | } | ||
1355 | |||
1356 | inparse = 0; | ||
1357 | brklist = 0; | ||
1358 | intr = 0; | ||
1359 | execflg = 0; | ||
1360 | |||
1361 | niro | 816 | if (!FLAG['n']) { |
1362 | niro | 532 | DBGPRINTF(("ONECOMMAND: calling execute, t=outtree=%p\n", |
1363 | outtree)); | ||
1364 | niro | 816 | execute(outtree, NOPIPE, NOPIPE, /* no_fork: */ 0); |
1365 | niro | 532 | } |
1366 | |||
1367 | if (!interactive && intr) { | ||
1368 | execflg = 0; | ||
1369 | leave(); | ||
1370 | } | ||
1371 | |||
1372 | i = trapset; | ||
1373 | if (i != 0) { | ||
1374 | trapset = 0; | ||
1375 | runtrap(i); | ||
1376 | } | ||
1377 | } | ||
1378 | |||
1379 | static int newenv(int f) | ||
1380 | { | ||
1381 | struct env *ep; | ||
1382 | |||
1383 | DBGPRINTF(("NEWENV: f=%d (indicates quitenv and return)\n", f)); | ||
1384 | |||
1385 | if (f) { | ||
1386 | quitenv(); | ||
1387 | return 1; | ||
1388 | } | ||
1389 | |||
1390 | niro | 816 | ep = get_space(sizeof(*ep)); |
1391 | niro | 532 | if (ep == NULL) { |
1392 | niro | 816 | while (global_env.oenv) |
1393 | niro | 532 | quitenv(); |
1394 | fail(); | ||
1395 | } | ||
1396 | niro | 816 | *ep = global_env; |
1397 | global_env.oenv = ep; | ||
1398 | global_env.errpt = errpt; | ||
1399 | niro | 532 | |
1400 | return 0; | ||
1401 | } | ||
1402 | |||
1403 | static void quitenv(void) | ||
1404 | { | ||
1405 | struct env *ep; | ||
1406 | int fd; | ||
1407 | |||
1408 | niro | 816 | DBGPRINTF(("QUITENV: global_env.oenv=%p\n", global_env.oenv)); |
1409 | niro | 532 | |
1410 | niro | 816 | ep = global_env.oenv; |
1411 | niro | 532 | if (ep != NULL) { |
1412 | niro | 816 | fd = global_env.iofd; |
1413 | global_env = *ep; | ||
1414 | niro | 532 | /* should close `'d files */ |
1415 | DELETE(ep); | ||
1416 | niro | 816 | while (--fd >= global_env.iofd) |
1417 | niro | 532 | close(fd); |
1418 | } | ||
1419 | } | ||
1420 | |||
1421 | /* | ||
1422 | niro | 816 | * Is character c in s? |
1423 | niro | 532 | */ |
1424 | niro | 816 | static int any(int c, const char *s) |
1425 | niro | 532 | { |
1426 | niro | 816 | while (*s) |
1427 | if (*s++ == c) | ||
1428 | niro | 532 | return 1; |
1429 | return 0; | ||
1430 | } | ||
1431 | |||
1432 | /* | ||
1433 | niro | 816 | * Is any character from s1 in s2? |
1434 | niro | 532 | */ |
1435 | niro | 816 | static int anys(const char *s1, const char *s2) |
1436 | niro | 532 | { |
1437 | niro | 816 | while (*s1) |
1438 | if (any(*s1++, s2)) | ||
1439 | niro | 532 | return 1; |
1440 | return 0; | ||
1441 | } | ||
1442 | |||
1443 | static char *putn(int n) | ||
1444 | { | ||
1445 | return itoa(n); | ||
1446 | } | ||
1447 | |||
1448 | static void next(int f) | ||
1449 | { | ||
1450 | PUSHIO(afile, f, filechar); | ||
1451 | } | ||
1452 | |||
1453 | niro | 816 | static void onintr(int s UNUSED_PARAM) /* ANSI C requires a parameter */ |
1454 | niro | 532 | { |
1455 | signal(SIGINT, onintr); | ||
1456 | intr = 1; | ||
1457 | if (interactive) { | ||
1458 | if (inparse) { | ||
1459 | prs("\n"); | ||
1460 | fail(); | ||
1461 | } | ||
1462 | } else if (heedint) { | ||
1463 | execflg = 0; | ||
1464 | leave(); | ||
1465 | } | ||
1466 | } | ||
1467 | |||
1468 | |||
1469 | /* -------- gmatch.c -------- */ | ||
1470 | /* | ||
1471 | * int gmatch(string, pattern) | ||
1472 | * char *string, *pattern; | ||
1473 | * | ||
1474 | * Match a pattern as in sh(1). | ||
1475 | */ | ||
1476 | |||
1477 | #define CMASK 0377 | ||
1478 | #define QUOTE 0200 | ||
1479 | niro | 816 | #define QMASK (CMASK & ~QUOTE) |
1480 | niro | 532 | #define NOT '!' /* might use ^ */ |
1481 | |||
1482 | niro | 816 | static const char *cclass(const char *p, int sub) |
1483 | niro | 532 | { |
1484 | niro | 816 | int c, d, not, found; |
1485 | |||
1486 | not = (*p == NOT); | ||
1487 | if (not != 0) | ||
1488 | p++; | ||
1489 | found = not; | ||
1490 | do { | ||
1491 | if (*p == '\0') | ||
1492 | return NULL; | ||
1493 | c = *p & CMASK; | ||
1494 | if (p[1] == '-' && p[2] != ']') { | ||
1495 | d = p[2] & CMASK; | ||
1496 | p++; | ||
1497 | } else | ||
1498 | d = c; | ||
1499 | if (c == sub || (c <= sub && sub <= d)) | ||
1500 | found = !not; | ||
1501 | } while (*++p != ']'); | ||
1502 | return found ? p + 1 : NULL; | ||
1503 | } | ||
1504 | |||
1505 | static int gmatch(const char *s, const char *p) | ||
1506 | { | ||
1507 | niro | 532 | int sc, pc; |
1508 | |||
1509 | if (s == NULL || p == NULL) | ||
1510 | return 0; | ||
1511 | niro | 816 | |
1512 | niro | 532 | while ((pc = *p++ & CMASK) != '\0') { |
1513 | sc = *s++ & QMASK; | ||
1514 | switch (pc) { | ||
1515 | case '[': | ||
1516 | p = cclass(p, sc); | ||
1517 | if (p == NULL) | ||
1518 | return 0; | ||
1519 | break; | ||
1520 | |||
1521 | case '?': | ||
1522 | if (sc == 0) | ||
1523 | return 0; | ||
1524 | break; | ||
1525 | |||
1526 | case '*': | ||
1527 | s--; | ||
1528 | do { | ||
1529 | if (*p == '\0' || gmatch(s, p)) | ||
1530 | return 1; | ||
1531 | } while (*s++ != '\0'); | ||
1532 | return 0; | ||
1533 | |||
1534 | default: | ||
1535 | if (sc != (pc & ~QUOTE)) | ||
1536 | return 0; | ||
1537 | } | ||
1538 | } | ||
1539 | niro | 816 | return *s == '\0'; |
1540 | niro | 532 | } |
1541 | |||
1542 | |||
1543 | niro | 816 | /* -------- csyn.c -------- */ |
1544 | niro | 532 | /* |
1545 | niro | 816 | * shell: syntax (C version) |
1546 | niro | 532 | */ |
1547 | |||
1548 | niro | 816 | static void yyerror(const char *s) NORETURN; |
1549 | static void yyerror(const char *s) | ||
1550 | niro | 532 | { |
1551 | niro | 816 | yynerrs = 1; |
1552 | if (interactive && global_env.iop <= iostack) { | ||
1553 | multiline = 0; | ||
1554 | while (eofc() == 0 && yylex(0) != '\n') | ||
1555 | continue; | ||
1556 | niro | 532 | } |
1557 | niro | 816 | err(s); |
1558 | fail(); | ||
1559 | niro | 532 | } |
1560 | |||
1561 | niro | 816 | static void zzerr(void) NORETURN; |
1562 | static void zzerr(void) | ||
1563 | niro | 532 | { |
1564 | niro | 816 | yyerror("syntax error"); |
1565 | niro | 532 | } |
1566 | |||
1567 | int yyparse(void) | ||
1568 | { | ||
1569 | DBGPRINTF7(("YYPARSE: enter...\n")); | ||
1570 | |||
1571 | startl = 1; | ||
1572 | peeksym = 0; | ||
1573 | yynerrs = 0; | ||
1574 | outtree = c_list(); | ||
1575 | musthave('\n', 0); | ||
1576 | niro | 816 | return yynerrs; /* 0/1 */ |
1577 | niro | 532 | } |
1578 | |||
1579 | static struct op *pipeline(int cf) | ||
1580 | { | ||
1581 | struct op *t, *p; | ||
1582 | int c; | ||
1583 | |||
1584 | DBGPRINTF7(("PIPELINE: enter, cf=%d\n", cf)); | ||
1585 | |||
1586 | t = command(cf); | ||
1587 | |||
1588 | DBGPRINTF9(("PIPELINE: t=%p\n", t)); | ||
1589 | |||
1590 | if (t != NULL) { | ||
1591 | while ((c = yylex(0)) == '|') { | ||
1592 | p = command(CONTIN); | ||
1593 | if (p == NULL) { | ||
1594 | DBGPRINTF8(("PIPELINE: error!\n")); | ||
1595 | niro | 816 | zzerr(); |
1596 | niro | 532 | } |
1597 | |||
1598 | niro | 816 | if (t->op_type != TPAREN && t->op_type != TCOM) { |
1599 | niro | 532 | /* shell statement */ |
1600 | t = block(TPAREN, t, NOBLOCK, NOWORDS); | ||
1601 | } | ||
1602 | |||
1603 | t = block(TPIPE, t, p, NOWORDS); | ||
1604 | } | ||
1605 | peeksym = c; | ||
1606 | } | ||
1607 | |||
1608 | DBGPRINTF7(("PIPELINE: returning t=%p\n", t)); | ||
1609 | return t; | ||
1610 | } | ||
1611 | |||
1612 | static struct op *andor(void) | ||
1613 | { | ||
1614 | struct op *t, *p; | ||
1615 | int c; | ||
1616 | |||
1617 | DBGPRINTF7(("ANDOR: enter...\n")); | ||
1618 | |||
1619 | t = pipeline(0); | ||
1620 | |||
1621 | DBGPRINTF9(("ANDOR: t=%p\n", t)); | ||
1622 | |||
1623 | if (t != NULL) { | ||
1624 | while ((c = yylex(0)) == LOGAND || c == LOGOR) { | ||
1625 | p = pipeline(CONTIN); | ||
1626 | if (p == NULL) { | ||
1627 | DBGPRINTF8(("ANDOR: error!\n")); | ||
1628 | niro | 816 | zzerr(); |
1629 | niro | 532 | } |
1630 | |||
1631 | t = block(c == LOGAND ? TAND : TOR, t, p, NOWORDS); | ||
1632 | niro | 816 | } |
1633 | niro | 532 | |
1634 | peeksym = c; | ||
1635 | } | ||
1636 | |||
1637 | DBGPRINTF7(("ANDOR: returning t=%p\n", t)); | ||
1638 | return t; | ||
1639 | } | ||
1640 | |||
1641 | static struct op *c_list(void) | ||
1642 | { | ||
1643 | struct op *t, *p; | ||
1644 | int c; | ||
1645 | |||
1646 | DBGPRINTF7(("C_LIST: enter...\n")); | ||
1647 | |||
1648 | t = andor(); | ||
1649 | |||
1650 | if (t != NULL) { | ||
1651 | peeksym = yylex(0); | ||
1652 | if (peeksym == '&') | ||
1653 | t = block(TASYNC, t, NOBLOCK, NOWORDS); | ||
1654 | |||
1655 | while ((c = yylex(0)) == ';' || c == '&' | ||
1656 | niro | 816 | || (multiline && c == '\n') |
1657 | ) { | ||
1658 | niro | 532 | p = andor(); |
1659 | if (p== NULL) | ||
1660 | return t; | ||
1661 | |||
1662 | peeksym = yylex(0); | ||
1663 | if (peeksym == '&') | ||
1664 | p = block(TASYNC, p, NOBLOCK, NOWORDS); | ||
1665 | |||
1666 | t = list(t, p); | ||
1667 | } /* WHILE */ | ||
1668 | |||
1669 | peeksym = c; | ||
1670 | } | ||
1671 | /* IF */ | ||
1672 | DBGPRINTF7(("C_LIST: returning t=%p\n", t)); | ||
1673 | return t; | ||
1674 | } | ||
1675 | |||
1676 | static int synio(int cf) | ||
1677 | { | ||
1678 | struct ioword *iop; | ||
1679 | int i; | ||
1680 | int c; | ||
1681 | |||
1682 | DBGPRINTF7(("SYNIO: enter, cf=%d\n", cf)); | ||
1683 | |||
1684 | c = yylex(cf); | ||
1685 | if (c != '<' && c != '>') { | ||
1686 | peeksym = c; | ||
1687 | return 0; | ||
1688 | } | ||
1689 | |||
1690 | i = yylval.i; | ||
1691 | musthave(WORD, 0); | ||
1692 | iop = io(iounit, i, yylval.cp); | ||
1693 | iounit = IODEFAULT; | ||
1694 | |||
1695 | if (i & IOHERE) | ||
1696 | markhere(yylval.cp, iop); | ||
1697 | |||
1698 | DBGPRINTF7(("SYNIO: returning 1\n")); | ||
1699 | return 1; | ||
1700 | } | ||
1701 | |||
1702 | static void musthave(int c, int cf) | ||
1703 | { | ||
1704 | niro | 816 | peeksym = yylex(cf); |
1705 | if (peeksym != c) { | ||
1706 | niro | 532 | DBGPRINTF7(("MUSTHAVE: error!\n")); |
1707 | niro | 816 | zzerr(); |
1708 | niro | 532 | } |
1709 | |||
1710 | peeksym = 0; | ||
1711 | } | ||
1712 | |||
1713 | static struct op *simple(void) | ||
1714 | { | ||
1715 | struct op *t; | ||
1716 | |||
1717 | t = NULL; | ||
1718 | for (;;) { | ||
1719 | switch (peeksym = yylex(0)) { | ||
1720 | case '<': | ||
1721 | case '>': | ||
1722 | (void) synio(0); | ||
1723 | break; | ||
1724 | |||
1725 | case WORD: | ||
1726 | if (t == NULL) { | ||
1727 | t = newtp(); | ||
1728 | niro | 816 | t->op_type = TCOM; |
1729 | niro | 532 | } |
1730 | peeksym = 0; | ||
1731 | word(yylval.cp); | ||
1732 | break; | ||
1733 | |||
1734 | default: | ||
1735 | return t; | ||
1736 | } | ||
1737 | } | ||
1738 | } | ||
1739 | |||
1740 | static struct op *nested(int type, int mark) | ||
1741 | { | ||
1742 | struct op *t; | ||
1743 | |||
1744 | DBGPRINTF3(("NESTED: enter, type=%d, mark=%d\n", type, mark)); | ||
1745 | |||
1746 | multiline++; | ||
1747 | t = c_list(); | ||
1748 | musthave(mark, 0); | ||
1749 | multiline--; | ||
1750 | return block(type, t, NOBLOCK, NOWORDS); | ||
1751 | } | ||
1752 | |||
1753 | static struct op *command(int cf) | ||
1754 | { | ||
1755 | struct op *t; | ||
1756 | struct wdblock *iosave; | ||
1757 | int c; | ||
1758 | |||
1759 | DBGPRINTF(("COMMAND: enter, cf=%d\n", cf)); | ||
1760 | |||
1761 | iosave = iolist; | ||
1762 | iolist = NULL; | ||
1763 | |||
1764 | if (multiline) | ||
1765 | cf |= CONTIN; | ||
1766 | |||
1767 | while (synio(cf)) | ||
1768 | cf = 0; | ||
1769 | |||
1770 | c = yylex(cf); | ||
1771 | |||
1772 | switch (c) { | ||
1773 | default: | ||
1774 | peeksym = c; | ||
1775 | t = simple(); | ||
1776 | if (t == NULL) { | ||
1777 | if (iolist == NULL) | ||
1778 | return NULL; | ||
1779 | t = newtp(); | ||
1780 | niro | 816 | t->op_type = TCOM; |
1781 | niro | 532 | } |
1782 | break; | ||
1783 | |||
1784 | case '(': | ||
1785 | t = nested(TPAREN, ')'); | ||
1786 | break; | ||
1787 | |||
1788 | case '{': | ||
1789 | t = nested(TBRACE, '}'); | ||
1790 | break; | ||
1791 | |||
1792 | case FOR: | ||
1793 | t = newtp(); | ||
1794 | niro | 816 | t->op_type = TFOR; |
1795 | niro | 532 | musthave(WORD, 0); |
1796 | startl = 1; | ||
1797 | t->str = yylval.cp; | ||
1798 | multiline++; | ||
1799 | niro | 816 | t->op_words = wordlist(); |
1800 | niro | 532 | c = yylex(0); |
1801 | if (c != '\n' && c != ';') | ||
1802 | peeksym = c; | ||
1803 | t->left = dogroup(0); | ||
1804 | multiline--; | ||
1805 | break; | ||
1806 | |||
1807 | case WHILE: | ||
1808 | case UNTIL: | ||
1809 | multiline++; | ||
1810 | t = newtp(); | ||
1811 | niro | 816 | t->op_type = (c == WHILE ? TWHILE : TUNTIL); |
1812 | niro | 532 | t->left = c_list(); |
1813 | t->right = dogroup(1); | ||
1814 | niro | 816 | /* t->op_words = NULL; - newtp() did this */ |
1815 | niro | 532 | multiline--; |
1816 | break; | ||
1817 | |||
1818 | case CASE: | ||
1819 | t = newtp(); | ||
1820 | niro | 816 | t->op_type = TCASE; |
1821 | niro | 532 | musthave(WORD, 0); |
1822 | t->str = yylval.cp; | ||
1823 | startl++; | ||
1824 | multiline++; | ||
1825 | musthave(IN, CONTIN); | ||
1826 | startl++; | ||
1827 | |||
1828 | t->left = caselist(); | ||
1829 | |||
1830 | musthave(ESAC, 0); | ||
1831 | multiline--; | ||
1832 | break; | ||
1833 | |||
1834 | case IF: | ||
1835 | multiline++; | ||
1836 | t = newtp(); | ||
1837 | niro | 816 | t->op_type = TIF; |
1838 | niro | 532 | t->left = c_list(); |
1839 | t->right = thenpart(); | ||
1840 | musthave(FI, 0); | ||
1841 | multiline--; | ||
1842 | break; | ||
1843 | |||
1844 | case DOT: | ||
1845 | t = newtp(); | ||
1846 | niro | 816 | t->op_type = TDOT; |
1847 | niro | 532 | |
1848 | niro | 816 | musthave(WORD, 0); /* gets name of file */ |
1849 | niro | 532 | DBGPRINTF7(("COMMAND: DOT clause, yylval.cp is %s\n", yylval.cp)); |
1850 | |||
1851 | niro | 816 | word(yylval.cp); /* add word to wdlist */ |
1852 | word(NOWORD); /* terminate wdlist */ | ||
1853 | t->op_words = copyw(); /* dup wdlist */ | ||
1854 | niro | 532 | break; |
1855 | |||
1856 | } | ||
1857 | |||
1858 | niro | 816 | while (synio(0)) |
1859 | continue; | ||
1860 | niro | 532 | |
1861 | t = namelist(t); | ||
1862 | iolist = iosave; | ||
1863 | |||
1864 | DBGPRINTF(("COMMAND: returning %p\n", t)); | ||
1865 | |||
1866 | return t; | ||
1867 | } | ||
1868 | |||
1869 | niro | 816 | static struct op *dowholefile(int type /*, int mark*/) |
1870 | niro | 532 | { |
1871 | struct op *t; | ||
1872 | |||
1873 | niro | 816 | DBGPRINTF(("DOWHOLEFILE: enter, type=%d\n", type /*, mark*/)); |
1874 | niro | 532 | |
1875 | multiline++; | ||
1876 | t = c_list(); | ||
1877 | multiline--; | ||
1878 | t = block(type, t, NOBLOCK, NOWORDS); | ||
1879 | DBGPRINTF(("DOWHOLEFILE: return t=%p\n", t)); | ||
1880 | return t; | ||
1881 | } | ||
1882 | |||
1883 | static struct op *dogroup(int onlydone) | ||
1884 | { | ||
1885 | int c; | ||
1886 | struct op *mylist; | ||
1887 | |||
1888 | c = yylex(CONTIN); | ||
1889 | if (c == DONE && onlydone) | ||
1890 | return NULL; | ||
1891 | if (c != DO) | ||
1892 | niro | 816 | zzerr(); |
1893 | niro | 532 | mylist = c_list(); |
1894 | musthave(DONE, 0); | ||
1895 | return mylist; | ||
1896 | } | ||
1897 | |||
1898 | static struct op *thenpart(void) | ||
1899 | { | ||
1900 | int c; | ||
1901 | struct op *t; | ||
1902 | |||
1903 | c = yylex(0); | ||
1904 | if (c != THEN) { | ||
1905 | peeksym = c; | ||
1906 | return NULL; | ||
1907 | } | ||
1908 | t = newtp(); | ||
1909 | niro | 816 | /*t->op_type = 0; - newtp() did this */ |
1910 | niro | 532 | t->left = c_list(); |
1911 | if (t->left == NULL) | ||
1912 | niro | 816 | zzerr(); |
1913 | niro | 532 | t->right = elsepart(); |
1914 | return t; | ||
1915 | } | ||
1916 | |||
1917 | static struct op *elsepart(void) | ||
1918 | { | ||
1919 | int c; | ||
1920 | struct op *t; | ||
1921 | |||
1922 | switch (c = yylex(0)) { | ||
1923 | case ELSE: | ||
1924 | t = c_list(); | ||
1925 | if (t == NULL) | ||
1926 | niro | 816 | zzerr(); |
1927 | niro | 532 | return t; |
1928 | |||
1929 | case ELIF: | ||
1930 | t = newtp(); | ||
1931 | niro | 816 | t->op_type = TELIF; |
1932 | niro | 532 | t->left = c_list(); |
1933 | t->right = thenpart(); | ||
1934 | return t; | ||
1935 | |||
1936 | default: | ||
1937 | peeksym = c; | ||
1938 | return NULL; | ||
1939 | } | ||
1940 | } | ||
1941 | |||
1942 | static struct op *caselist(void) | ||
1943 | { | ||
1944 | struct op *t; | ||
1945 | |||
1946 | t = NULL; | ||
1947 | while ((peeksym = yylex(CONTIN)) != ESAC) { | ||
1948 | DBGPRINTF(("CASELIST, doing yylex, peeksym=%d\n", peeksym)); | ||
1949 | t = list(t, casepart()); | ||
1950 | } | ||
1951 | |||
1952 | DBGPRINTF(("CASELIST, returning t=%p\n", t)); | ||
1953 | return t; | ||
1954 | } | ||
1955 | |||
1956 | static struct op *casepart(void) | ||
1957 | { | ||
1958 | struct op *t; | ||
1959 | |||
1960 | DBGPRINTF7(("CASEPART: enter...\n")); | ||
1961 | |||
1962 | t = newtp(); | ||
1963 | niro | 816 | t->op_type = TPAT; |
1964 | t->op_words = pattern(); | ||
1965 | niro | 532 | musthave(')', 0); |
1966 | t->left = c_list(); | ||
1967 | peeksym = yylex(CONTIN); | ||
1968 | if (peeksym != ESAC) | ||
1969 | musthave(BREAK, CONTIN); | ||
1970 | |||
1971 | DBGPRINTF7(("CASEPART: made newtp(TPAT, t=%p)\n", t)); | ||
1972 | |||
1973 | return t; | ||
1974 | } | ||
1975 | |||
1976 | static char **pattern(void) | ||
1977 | { | ||
1978 | int c, cf; | ||
1979 | |||
1980 | cf = CONTIN; | ||
1981 | do { | ||
1982 | musthave(WORD, cf); | ||
1983 | word(yylval.cp); | ||
1984 | cf = 0; | ||
1985 | c = yylex(0); | ||
1986 | } while (c == '|'); | ||
1987 | peeksym = c; | ||
1988 | word(NOWORD); | ||
1989 | |||
1990 | return copyw(); | ||
1991 | } | ||
1992 | |||
1993 | static char **wordlist(void) | ||
1994 | { | ||
1995 | int c; | ||
1996 | |||
1997 | c = yylex(0); | ||
1998 | if (c != IN) { | ||
1999 | peeksym = c; | ||
2000 | return NULL; | ||
2001 | } | ||
2002 | startl = 0; | ||
2003 | while ((c = yylex(0)) == WORD) | ||
2004 | word(yylval.cp); | ||
2005 | word(NOWORD); | ||
2006 | peeksym = c; | ||
2007 | return copyw(); | ||
2008 | } | ||
2009 | |||
2010 | /* | ||
2011 | * supporting functions | ||
2012 | */ | ||
2013 | static struct op *list(struct op *t1, struct op *t2) | ||
2014 | { | ||
2015 | DBGPRINTF7(("LIST: enter, t1=%p, t2=%p\n", t1, t2)); | ||
2016 | |||
2017 | if (t1 == NULL) | ||
2018 | return t2; | ||
2019 | if (t2 == NULL) | ||
2020 | return t1; | ||
2021 | |||
2022 | return block(TLIST, t1, t2, NOWORDS); | ||
2023 | } | ||
2024 | |||
2025 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp) | ||
2026 | { | ||
2027 | struct op *t; | ||
2028 | |||
2029 | DBGPRINTF7(("BLOCK: enter, type=%d (%s)\n", type, T_CMD_NAMES[type])); | ||
2030 | |||
2031 | t = newtp(); | ||
2032 | niro | 816 | t->op_type = type; |
2033 | niro | 532 | t->left = t1; |
2034 | t->right = t2; | ||
2035 | niro | 816 | t->op_words = wp; |
2036 | niro | 532 | |
2037 | niro | 816 | DBGPRINTF7(("BLOCK: inserted %p between %p and %p\n", t, t1, t2)); |
2038 | niro | 532 | |
2039 | return t; | ||
2040 | } | ||
2041 | |||
2042 | /* See if given string is a shell multiline (FOR, IF, etc) */ | ||
2043 | static int rlookup(char *n) | ||
2044 | { | ||
2045 | niro | 816 | struct res { |
2046 | char r_name[6]; | ||
2047 | int16_t r_val; | ||
2048 | }; | ||
2049 | static const struct res restab[] = { | ||
2050 | { "for" , FOR }, | ||
2051 | { "case" , CASE }, | ||
2052 | { "esac" , ESAC }, | ||
2053 | { "while", WHILE }, | ||
2054 | { "do" , DO }, | ||
2055 | { "done" , DONE }, | ||
2056 | { "if" , IF }, | ||
2057 | { "in" , IN }, | ||
2058 | { "then" , THEN }, | ||
2059 | { "else" , ELSE }, | ||
2060 | { "elif" , ELIF }, | ||
2061 | { "until", UNTIL }, | ||
2062 | { "fi" , FI }, | ||
2063 | { ";;" , BREAK }, | ||
2064 | { "||" , LOGOR }, | ||
2065 | { "&&" , LOGAND }, | ||
2066 | { "{" , '{' }, | ||
2067 | { "}" , '}' }, | ||
2068 | { "." , DOT }, | ||
2069 | { }, | ||
2070 | }; | ||
2071 | |||
2072 | niro | 532 | const struct res *rp; |
2073 | |||
2074 | DBGPRINTF7(("RLOOKUP: enter, n is %s\n", n)); | ||
2075 | |||
2076 | niro | 816 | for (rp = restab; rp->r_name[0]; rp++) |
2077 | niro | 532 | if (strcmp(rp->r_name, n) == 0) { |
2078 | DBGPRINTF7(("RLOOKUP: match, returning %d\n", rp->r_val)); | ||
2079 | return rp->r_val; /* Return numeric code for shell multiline */ | ||
2080 | } | ||
2081 | |||
2082 | DBGPRINTF7(("RLOOKUP: NO match, returning 0\n")); | ||
2083 | return 0; /* Not a shell multiline */ | ||
2084 | } | ||
2085 | |||
2086 | static struct op *newtp(void) | ||
2087 | { | ||
2088 | struct op *t; | ||
2089 | |||
2090 | t = (struct op *) tree(sizeof(*t)); | ||
2091 | niro | 816 | memset(t, 0, sizeof(*t)); |
2092 | niro | 532 | |
2093 | DBGPRINTF3(("NEWTP: allocated %p\n", t)); | ||
2094 | |||
2095 | return t; | ||
2096 | } | ||
2097 | |||
2098 | static struct op *namelist(struct op *t) | ||
2099 | { | ||
2100 | DBGPRINTF7(("NAMELIST: enter, t=%p, type %s, iolist=%p\n", t, | ||
2101 | niro | 816 | T_CMD_NAMES[t->op_type], iolist)); |
2102 | niro | 532 | |
2103 | if (iolist) { | ||
2104 | iolist = addword((char *) NULL, iolist); | ||
2105 | t->ioact = copyio(); | ||
2106 | } else | ||
2107 | t->ioact = NULL; | ||
2108 | |||
2109 | niro | 816 | if (t->op_type != TCOM) { |
2110 | if (t->op_type != TPAREN && t->ioact != NULL) { | ||
2111 | niro | 532 | t = block(TPAREN, t, NOBLOCK, NOWORDS); |
2112 | t->ioact = t->left->ioact; | ||
2113 | t->left->ioact = NULL; | ||
2114 | } | ||
2115 | return t; | ||
2116 | } | ||
2117 | |||
2118 | word(NOWORD); | ||
2119 | niro | 816 | t->op_words = copyw(); |
2120 | niro | 532 | |
2121 | return t; | ||
2122 | } | ||
2123 | |||
2124 | static char **copyw(void) | ||
2125 | { | ||
2126 | char **wd; | ||
2127 | |||
2128 | wd = getwords(wdlist); | ||
2129 | niro | 816 | wdlist = NULL; |
2130 | niro | 532 | return wd; |
2131 | } | ||
2132 | |||
2133 | static void word(char *cp) | ||
2134 | { | ||
2135 | wdlist = addword(cp, wdlist); | ||
2136 | } | ||
2137 | |||
2138 | static struct ioword **copyio(void) | ||
2139 | { | ||
2140 | struct ioword **iop; | ||
2141 | |||
2142 | iop = (struct ioword **) getwords(iolist); | ||
2143 | niro | 816 | iolist = NULL; |
2144 | niro | 532 | return iop; |
2145 | } | ||
2146 | |||
2147 | static struct ioword *io(int u, int f, char *cp) | ||
2148 | { | ||
2149 | struct ioword *iop; | ||
2150 | |||
2151 | iop = (struct ioword *) tree(sizeof(*iop)); | ||
2152 | niro | 816 | iop->io_fd = u; |
2153 | niro | 532 | iop->io_flag = f; |
2154 | iop->io_name = cp; | ||
2155 | iolist = addword((char *) iop, iolist); | ||
2156 | return iop; | ||
2157 | } | ||
2158 | |||
2159 | static int yylex(int cf) | ||
2160 | { | ||
2161 | int c, c1; | ||
2162 | int atstart; | ||
2163 | |||
2164 | c = peeksym; | ||
2165 | if (c > 0) { | ||
2166 | peeksym = 0; | ||
2167 | if (c == '\n') | ||
2168 | startl = 1; | ||
2169 | return c; | ||
2170 | } | ||
2171 | |||
2172 | nlseen = 0; | ||
2173 | atstart = startl; | ||
2174 | startl = 0; | ||
2175 | yylval.i = 0; | ||
2176 | niro | 816 | global_env.linep = line; |
2177 | niro | 532 | |
2178 | /* MALAMO */ | ||
2179 | line[LINELIM - 1] = '\0'; | ||
2180 | |||
2181 | niro | 816 | loop: |
2182 | niro | 532 | while ((c = my_getc(0)) == ' ' || c == '\t') /* Skip whitespace */ |
2183 | niro | 816 | continue; |
2184 | niro | 532 | |
2185 | switch (c) { | ||
2186 | default: | ||
2187 | if (any(c, "0123456789")) { | ||
2188 | niro | 816 | c1 = my_getc(0); |
2189 | unget(c1); | ||
2190 | niro | 532 | if (c1 == '<' || c1 == '>') { |
2191 | iounit = c - '0'; | ||
2192 | goto loop; | ||
2193 | } | ||
2194 | niro | 816 | *global_env.linep++ = c; |
2195 | niro | 532 | c = c1; |
2196 | } | ||
2197 | break; | ||
2198 | |||
2199 | niro | 816 | case '#': /* Comment, skip to next newline or End-of-string */ |
2200 | while ((c = my_getc(0)) != '\0' && c != '\n') | ||
2201 | continue; | ||
2202 | niro | 532 | unget(c); |
2203 | goto loop; | ||
2204 | |||
2205 | case 0: | ||
2206 | DBGPRINTF5(("YYLEX: return 0, c=%d\n", c)); | ||
2207 | return c; | ||
2208 | |||
2209 | case '$': | ||
2210 | DBGPRINTF9(("YYLEX: found $\n")); | ||
2211 | niro | 816 | *global_env.linep++ = c; |
2212 | c = my_getc(0); | ||
2213 | if (c == '{') { | ||
2214 | c = collect(c, '}'); | ||
2215 | if (c != '\0') | ||
2216 | niro | 532 | return c; |
2217 | goto pack; | ||
2218 | } | ||
2219 | break; | ||
2220 | |||
2221 | case '`': | ||
2222 | case '\'': | ||
2223 | case '"': | ||
2224 | niro | 816 | c = collect(c, c); |
2225 | if (c != '\0') | ||
2226 | niro | 532 | return c; |
2227 | goto pack; | ||
2228 | |||
2229 | case '|': | ||
2230 | case '&': | ||
2231 | case ';': | ||
2232 | startl = 1; | ||
2233 | /* If more chars process them, else return NULL char */ | ||
2234 | niro | 816 | c1 = dual(c); |
2235 | if (c1 != '\0') | ||
2236 | niro | 532 | return c1; |
2237 | niro | 816 | return c; |
2238 | niro | 532 | |
2239 | case '^': | ||
2240 | startl = 1; | ||
2241 | return '|'; | ||
2242 | case '>': | ||
2243 | case '<': | ||
2244 | diag(c); | ||
2245 | return c; | ||
2246 | |||
2247 | case '\n': | ||
2248 | nlseen++; | ||
2249 | gethere(); | ||
2250 | startl = 1; | ||
2251 | if (multiline || cf & CONTIN) { | ||
2252 | niro | 816 | if (interactive && global_env.iop <= iostack) { |
2253 | #if ENABLE_FEATURE_EDITING | ||
2254 | niro | 532 | current_prompt = cprompt->value; |
2255 | #else | ||
2256 | prs(cprompt->value); | ||
2257 | #endif | ||
2258 | } | ||
2259 | if (cf & CONTIN) | ||
2260 | goto loop; | ||
2261 | } | ||
2262 | return c; | ||
2263 | |||
2264 | case '(': | ||
2265 | case ')': | ||
2266 | startl = 1; | ||
2267 | return c; | ||
2268 | } | ||
2269 | |||
2270 | unget(c); | ||
2271 | |||
2272 | niro | 816 | pack: |
2273 | while ((c = my_getc(0)) != '\0' && !any(c, "`$ '\"\t;&<>()|^\n")) { | ||
2274 | if (global_env.linep >= elinep) | ||
2275 | niro | 532 | err("word too long"); |
2276 | else | ||
2277 | niro | 816 | *global_env.linep++ = c; |
2278 | niro | 532 | }; |
2279 | |||
2280 | unget(c); | ||
2281 | |||
2282 | if (any(c, "\"'`$")) | ||
2283 | goto loop; | ||
2284 | |||
2285 | niro | 816 | *global_env.linep++ = '\0'; |
2286 | niro | 532 | |
2287 | niro | 816 | if (atstart) { |
2288 | c = rlookup(line); | ||
2289 | if (c != 0) { | ||
2290 | startl = 1; | ||
2291 | return c; | ||
2292 | } | ||
2293 | niro | 532 | } |
2294 | |||
2295 | yylval.cp = strsave(line, areanum); | ||
2296 | return WORD; | ||
2297 | } | ||
2298 | |||
2299 | |||
2300 | static int collect(int c, int c1) | ||
2301 | { | ||
2302 | char s[2]; | ||
2303 | |||
2304 | DBGPRINTF8(("COLLECT: enter, c=%d, c1=%d\n", c, c1)); | ||
2305 | |||
2306 | niro | 816 | *global_env.linep++ = c; |
2307 | niro | 532 | while ((c = my_getc(c1)) != c1) { |
2308 | if (c == 0) { | ||
2309 | unget(c); | ||
2310 | s[0] = c1; | ||
2311 | s[1] = 0; | ||
2312 | prs("no closing "); | ||
2313 | yyerror(s); | ||
2314 | return YYERRCODE; | ||
2315 | } | ||
2316 | niro | 816 | if (interactive && c == '\n' && global_env.iop <= iostack) { |
2317 | #if ENABLE_FEATURE_EDITING | ||
2318 | niro | 532 | current_prompt = cprompt->value; |
2319 | #else | ||
2320 | prs(cprompt->value); | ||
2321 | #endif | ||
2322 | } | ||
2323 | niro | 816 | *global_env.linep++ = c; |
2324 | niro | 532 | } |
2325 | |||
2326 | niro | 816 | *global_env.linep++ = c; |
2327 | niro | 532 | |
2328 | DBGPRINTF8(("COLLECT: return 0, line is %s\n", line)); | ||
2329 | |||
2330 | return 0; | ||
2331 | } | ||
2332 | |||
2333 | /* "multiline commands" helper func */ | ||
2334 | /* see if next 2 chars form a shell multiline */ | ||
2335 | static int dual(int c) | ||
2336 | { | ||
2337 | char s[3]; | ||
2338 | char *cp = s; | ||
2339 | |||
2340 | DBGPRINTF8(("DUAL: enter, c=%d\n", c)); | ||
2341 | |||
2342 | niro | 816 | *cp++ = c; /* c is the given "peek" char */ |
2343 | *cp++ = my_getc(0); /* get next char of input */ | ||
2344 | *cp = '\0'; /* add EOS marker */ | ||
2345 | niro | 532 | |
2346 | niro | 816 | c = rlookup(s); /* see if 2 chars form a shell multiline */ |
2347 | niro | 532 | if (c == 0) |
2348 | niro | 816 | unget(*--cp); /* String is not a shell multiline, put peek char back */ |
2349 | niro | 532 | |
2350 | niro | 816 | return c; /* String is multiline, return numeric multiline (restab) code */ |
2351 | niro | 532 | } |
2352 | |||
2353 | static void diag(int ec) | ||
2354 | { | ||
2355 | int c; | ||
2356 | |||
2357 | DBGPRINTF8(("DIAG: enter, ec=%d\n", ec)); | ||
2358 | |||
2359 | c = my_getc(0); | ||
2360 | if (c == '>' || c == '<') { | ||
2361 | if (c != ec) | ||
2362 | zzerr(); | ||
2363 | niro | 816 | yylval.i = (ec == '>' ? IOWRITE | IOCAT : IOHERE); |
2364 | niro | 532 | c = my_getc(0); |
2365 | } else | ||
2366 | niro | 816 | yylval.i = (ec == '>' ? IOWRITE : IOREAD); |
2367 | niro | 532 | if (c != '&' || yylval.i == IOHERE) |
2368 | unget(c); | ||
2369 | else | ||
2370 | yylval.i |= IODUP; | ||
2371 | } | ||
2372 | |||
2373 | static char *tree(unsigned size) | ||
2374 | { | ||
2375 | char *t; | ||
2376 | |||
2377 | t = getcell(size); | ||
2378 | if (t == NULL) { | ||
2379 | DBGPRINTF2(("TREE: getcell(%d) failed!\n", size)); | ||
2380 | prs("command line too complicated\n"); | ||
2381 | fail(); | ||
2382 | /* NOTREACHED */ | ||
2383 | } | ||
2384 | return t; | ||
2385 | } | ||
2386 | |||
2387 | niro | 816 | |
2388 | niro | 532 | /* VARARGS1 */ |
2389 | /* ARGSUSED */ | ||
2390 | |||
2391 | /* -------- exec.c -------- */ | ||
2392 | |||
2393 | niro | 816 | static struct op **find1case(struct op *t, const char *w) |
2394 | { | ||
2395 | struct op *t1; | ||
2396 | struct op **tp; | ||
2397 | char **wp; | ||
2398 | char *cp; | ||
2399 | |||
2400 | if (t == NULL) { | ||
2401 | DBGPRINTF3(("FIND1CASE: enter, t==NULL, returning.\n")); | ||
2402 | return NULL; | ||
2403 | } | ||
2404 | |||
2405 | DBGPRINTF3(("FIND1CASE: enter, t->op_type=%d (%s)\n", t->op_type, | ||
2406 | T_CMD_NAMES[t->op_type])); | ||
2407 | |||
2408 | if (t->op_type == TLIST) { | ||
2409 | tp = find1case(t->left, w); | ||
2410 | if (tp != NULL) { | ||
2411 | DBGPRINTF3(("FIND1CASE: found one to the left, returning tp=%p\n", tp)); | ||
2412 | return tp; | ||
2413 | } | ||
2414 | t1 = t->right; /* TPAT */ | ||
2415 | } else | ||
2416 | t1 = t; | ||
2417 | |||
2418 | for (wp = t1->op_words; *wp;) { | ||
2419 | cp = evalstr(*wp++, DOSUB); | ||
2420 | if (cp && gmatch(w, cp)) { | ||
2421 | DBGPRINTF3(("FIND1CASE: returning &t1->left= %p.\n", | ||
2422 | &t1->left)); | ||
2423 | return &t1->left; | ||
2424 | } | ||
2425 | } | ||
2426 | |||
2427 | DBGPRINTF(("FIND1CASE: returning NULL\n")); | ||
2428 | return NULL; | ||
2429 | } | ||
2430 | |||
2431 | static struct op *findcase(struct op *t, const char *w) | ||
2432 | { | ||
2433 | struct op **tp; | ||
2434 | |||
2435 | tp = find1case(t, w); | ||
2436 | return tp != NULL ? *tp : NULL; | ||
2437 | } | ||
2438 | |||
2439 | niro | 532 | /* |
2440 | * execute tree | ||
2441 | */ | ||
2442 | |||
2443 | niro | 816 | static int execute(struct op *t, int *pin, int *pout, int no_fork) |
2444 | niro | 532 | { |
2445 | struct op *t1; | ||
2446 | volatile int i, rv, a; | ||
2447 | niro | 816 | const char *cp; |
2448 | char **wp, **wp2; | ||
2449 | niro | 532 | struct var *vp; |
2450 | struct op *outtree_save; | ||
2451 | struct brkcon bc; | ||
2452 | |||
2453 | #if __GNUC__ | ||
2454 | /* Avoid longjmp clobbering */ | ||
2455 | (void) ℘ | ||
2456 | #endif | ||
2457 | |||
2458 | if (t == NULL) { | ||
2459 | DBGPRINTF4(("EXECUTE: enter, t==null, returning.\n")); | ||
2460 | return 0; | ||
2461 | } | ||
2462 | |||
2463 | niro | 816 | DBGPRINTF(("EXECUTE: t=%p, t->op_type=%d (%s), t->op_words is %s\n", t, |
2464 | t->op_type, T_CMD_NAMES[t->op_type], | ||
2465 | ((t->op_words == NULL) ? "NULL" : t->op_words[0]))); | ||
2466 | niro | 532 | |
2467 | rv = 0; | ||
2468 | a = areanum++; | ||
2469 | niro | 816 | wp2 = t->op_words; |
2470 | wp = (wp2 != NULL) | ||
2471 | ? eval(wp2, t->op_type == TCOM ? DOALL : DOALL & ~DOKEY) | ||
2472 | niro | 532 | : NULL; |
2473 | |||
2474 | niro | 816 | switch (t->op_type) { |
2475 | niro | 532 | case TDOT: |
2476 | DBGPRINTF3(("EXECUTE: TDOT\n")); | ||
2477 | |||
2478 | outtree_save = outtree; | ||
2479 | |||
2480 | niro | 816 | newfile(evalstr(t->op_words[0], DOALL)); |
2481 | niro | 532 | |
2482 | niro | 816 | t->left = dowholefile(TLIST /*, 0*/); |
2483 | niro | 532 | t->right = NULL; |
2484 | |||
2485 | outtree = outtree_save; | ||
2486 | |||
2487 | if (t->left) | ||
2488 | niro | 816 | rv = execute(t->left, pin, pout, /* no_fork: */ 0); |
2489 | niro | 532 | if (t->right) |
2490 | niro | 816 | rv = execute(t->right, pin, pout, /* no_fork: */ 0); |
2491 | niro | 532 | break; |
2492 | |||
2493 | case TPAREN: | ||
2494 | niro | 816 | rv = execute(t->left, pin, pout, /* no_fork: */ 0); |
2495 | niro | 532 | break; |
2496 | |||
2497 | case TCOM: | ||
2498 | niro | 816 | rv = forkexec(t, pin, pout, no_fork, wp); |
2499 | niro | 532 | break; |
2500 | |||
2501 | case TPIPE: | ||
2502 | { | ||
2503 | int pv[2]; | ||
2504 | |||
2505 | rv = openpipe(pv); | ||
2506 | if (rv < 0) | ||
2507 | break; | ||
2508 | pv[0] = remap(pv[0]); | ||
2509 | pv[1] = remap(pv[1]); | ||
2510 | niro | 816 | (void) execute(t->left, pin, pv, /* no_fork: */ 0); |
2511 | rv = execute(t->right, pv, pout, /* no_fork: */ 0); | ||
2512 | niro | 532 | } |
2513 | break; | ||
2514 | |||
2515 | case TLIST: | ||
2516 | niro | 816 | (void) execute(t->left, pin, pout, /* no_fork: */ 0); |
2517 | rv = execute(t->right, pin, pout, /* no_fork: */ 0); | ||
2518 | niro | 532 | break; |
2519 | |||
2520 | case TASYNC: | ||
2521 | { | ||
2522 | niro | 816 | smallint hinteractive = interactive; |
2523 | niro | 532 | |
2524 | DBGPRINTF7(("EXECUTE: TASYNC clause, calling vfork()...\n")); | ||
2525 | |||
2526 | i = vfork(); | ||
2527 | niro | 816 | if (i == 0) { /* child */ |
2528 | niro | 532 | signal(SIGINT, SIG_IGN); |
2529 | signal(SIGQUIT, SIG_IGN); | ||
2530 | if (interactive) | ||
2531 | signal(SIGTERM, SIG_DFL); | ||
2532 | interactive = 0; | ||
2533 | if (pin == NULL) { | ||
2534 | close(0); | ||
2535 | niro | 816 | xopen(bb_dev_null, O_RDONLY); |
2536 | niro | 532 | } |
2537 | niro | 816 | _exit(execute(t->left, pin, pout, /* no_fork: */ 1)); |
2538 | niro | 532 | } |
2539 | niro | 816 | interactive = hinteractive; |
2540 | if (i != -1) { | ||
2541 | setval(lookup("!"), putn(i)); | ||
2542 | closepipe(pin); | ||
2543 | if (interactive) { | ||
2544 | prs(putn(i)); | ||
2545 | prs("\n"); | ||
2546 | } | ||
2547 | } else | ||
2548 | rv = -1; | ||
2549 | setstatus(rv); | ||
2550 | niro | 532 | } |
2551 | break; | ||
2552 | |||
2553 | case TOR: | ||
2554 | case TAND: | ||
2555 | niro | 816 | rv = execute(t->left, pin, pout, /* no_fork: */ 0); |
2556 | niro | 532 | t1 = t->right; |
2557 | niro | 816 | if (t1 != NULL && (rv == 0) == (t->op_type == TAND)) |
2558 | rv = execute(t1, pin, pout, /* no_fork: */ 0); | ||
2559 | niro | 532 | break; |
2560 | |||
2561 | case TFOR: | ||
2562 | if (wp == NULL) { | ||
2563 | wp = dolv + 1; | ||
2564 | niro | 816 | i = dolc; |
2565 | if (i < 0) | ||
2566 | niro | 532 | i = 0; |
2567 | } else { | ||
2568 | i = -1; | ||
2569 | niro | 816 | while (*wp++ != NULL) |
2570 | continue; | ||
2571 | niro | 532 | } |
2572 | vp = lookup(t->str); | ||
2573 | while (setjmp(bc.brkpt)) | ||
2574 | if (isbreak) | ||
2575 | goto broken; | ||
2576 | niro | 816 | /* Restore areanum value. It may be incremented by execute() |
2577 | * below, and then "continue" may jump back to setjmp above */ | ||
2578 | areanum = a + 1; | ||
2579 | freearea(areanum + 1); | ||
2580 | niro | 532 | brkset(&bc); |
2581 | for (t1 = t->left; i-- && *wp != NULL;) { | ||
2582 | setval(vp, *wp++); | ||
2583 | niro | 816 | rv = execute(t1, pin, pout, /* no_fork: */ 0); |
2584 | niro | 532 | } |
2585 | brklist = brklist->nextlev; | ||
2586 | break; | ||
2587 | |||
2588 | case TWHILE: | ||
2589 | case TUNTIL: | ||
2590 | while (setjmp(bc.brkpt)) | ||
2591 | if (isbreak) | ||
2592 | goto broken; | ||
2593 | niro | 816 | /* Restore areanum value. It may be incremented by execute() |
2594 | * below, and then "continue" may jump back to setjmp above */ | ||
2595 | areanum = a + 1; | ||
2596 | freearea(areanum + 1); | ||
2597 | niro | 532 | brkset(&bc); |
2598 | t1 = t->left; | ||
2599 | niro | 816 | while ((execute(t1, pin, pout, /* no_fork: */ 0) == 0) == (t->op_type == TWHILE)) |
2600 | rv = execute(t->right, pin, pout, /* no_fork: */ 0); | ||
2601 | niro | 532 | brklist = brklist->nextlev; |
2602 | break; | ||
2603 | |||
2604 | case TIF: | ||
2605 | case TELIF: | ||
2606 | if (t->right != NULL) { | ||
2607 | niro | 816 | rv = !execute(t->left, pin, pout, /* no_fork: */ 0) ? |
2608 | execute(t->right->left, pin, pout, /* no_fork: */ 0) : | ||
2609 | execute(t->right->right, pin, pout, /* no_fork: */ 0); | ||
2610 | niro | 532 | } |
2611 | break; | ||
2612 | |||
2613 | case TCASE: | ||
2614 | cp = evalstr(t->str, DOSUB | DOTRIM); | ||
2615 | niro | 816 | if (cp == NULL) |
2616 | niro | 532 | cp = ""; |
2617 | |||
2618 | DBGPRINTF7(("EXECUTE: TCASE, t->str is %s, cp is %s\n", | ||
2619 | ((t->str == NULL) ? "NULL" : t->str), | ||
2620 | ((cp == NULL) ? "NULL" : cp))); | ||
2621 | |||
2622 | t1 = findcase(t->left, cp); | ||
2623 | if (t1 != NULL) { | ||
2624 | DBGPRINTF7(("EXECUTE: TCASE, calling execute(t=%p, t1=%p)...\n", t, t1)); | ||
2625 | niro | 816 | rv = execute(t1, pin, pout, /* no_fork: */ 0); |
2626 | niro | 532 | DBGPRINTF7(("EXECUTE: TCASE, back from execute(t=%p, t1=%p)...\n", t, t1)); |
2627 | } | ||
2628 | break; | ||
2629 | |||
2630 | case TBRACE: | ||
2631 | /* | ||
2632 | niro | 816 | iopp = t->ioact; |
2633 | if (i) | ||
2634 | niro | 532 | while (*iopp) |
2635 | if (iosetup(*iopp++, pin!=NULL, pout!=NULL)) { | ||
2636 | rv = -1; | ||
2637 | break; | ||
2638 | } | ||
2639 | */ | ||
2640 | niro | 816 | if (rv >= 0) { |
2641 | t1 = t->left; | ||
2642 | if (t1) { | ||
2643 | rv = execute(t1, pin, pout, /* no_fork: */ 0); | ||
2644 | } | ||
2645 | } | ||
2646 | niro | 532 | break; |
2647 | |||
2648 | }; | ||
2649 | |||
2650 | niro | 816 | broken: |
2651 | // Restoring op_words is most likely not needed now: see comment in forkexec() | ||
2652 | // (also take a look at exec builtin (doexec) - it touches t->op_words) | ||
2653 | t->op_words = wp2; | ||
2654 | niro | 532 | isbreak = 0; |
2655 | freehere(areanum); | ||
2656 | freearea(areanum); | ||
2657 | areanum = a; | ||
2658 | if (interactive && intr) { | ||
2659 | closeall(); | ||
2660 | fail(); | ||
2661 | } | ||
2662 | |||
2663 | i = trapset; | ||
2664 | if (i != 0) { | ||
2665 | trapset = 0; | ||
2666 | runtrap(i); | ||
2667 | } | ||
2668 | |||
2669 | DBGPRINTF(("EXECUTE: returning from t=%p, rv=%d\n", t, rv)); | ||
2670 | return rv; | ||
2671 | } | ||
2672 | |||
2673 | niro | 816 | static builtin_func_ptr inbuilt(const char *s) |
2674 | niro | 532 | { |
2675 | niro | 816 | const struct builtincmd *bp; |
2676 | |||
2677 | for (bp = builtincmds; bp->name; bp++) | ||
2678 | if (strcmp(bp->name, s) == 0) | ||
2679 | return bp->builtinfunc; | ||
2680 | return NULL; | ||
2681 | } | ||
2682 | |||
2683 | static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp) | ||
2684 | { | ||
2685 | niro | 532 | pid_t newpid; |
2686 | niro | 816 | int i; |
2687 | builtin_func_ptr bltin = NULL; | ||
2688 | const char *bltin_name = NULL; | ||
2689 | const char *cp; | ||
2690 | niro | 532 | struct ioword **iopp; |
2691 | int resetsig; | ||
2692 | char **owp; | ||
2693 | niro | 816 | int forked; |
2694 | niro | 532 | |
2695 | int *hpin = pin; | ||
2696 | int *hpout = pout; | ||
2697 | char *hwp; | ||
2698 | niro | 816 | smallint hinteractive; |
2699 | smallint hintr; | ||
2700 | smallint hexecflg; | ||
2701 | niro | 532 | struct brkcon *hbrklist; |
2702 | |||
2703 | #if __GNUC__ | ||
2704 | /* Avoid longjmp clobbering */ | ||
2705 | (void) &pin; | ||
2706 | (void) &pout; | ||
2707 | (void) ℘ | ||
2708 | niro | 816 | (void) &bltin; |
2709 | niro | 532 | (void) &cp; |
2710 | (void) &resetsig; | ||
2711 | (void) &owp; | ||
2712 | #endif | ||
2713 | |||
2714 | niro | 816 | DBGPRINTF(("FORKEXEC: t=%p, pin %p, pout %p, no_fork %d\n", t, pin, |
2715 | pout, no_fork)); | ||
2716 | DBGPRINTF7(("FORKEXEC: t->op_words is %s\n", | ||
2717 | ((t->op_words == NULL) ? "NULL" : t->op_words[0]))); | ||
2718 | niro | 532 | owp = wp; |
2719 | resetsig = 0; | ||
2720 | niro | 816 | if (t->op_type == TCOM) { |
2721 | while (*wp++ != NULL) | ||
2722 | continue; | ||
2723 | niro | 532 | cp = *wp; |
2724 | |||
2725 | /* strip all initial assignments */ | ||
2726 | niro | 816 | /* FIXME: not correct wrt PATH=yyy command etc */ |
2727 | if (FLAG['x']) { | ||
2728 | niro | 532 | DBGPRINTF9(("FORKEXEC: echo'ing, cp=%p, wp=%p, owp=%p\n", |
2729 | cp, wp, owp)); | ||
2730 | echo(cp ? wp : owp); | ||
2731 | } | ||
2732 | |||
2733 | niro | 816 | if (cp == NULL) { |
2734 | if (t->ioact == NULL) { | ||
2735 | while ((cp = *owp++) != NULL && assign(cp, COPYV)) | ||
2736 | continue; | ||
2737 | DBGPRINTF(("FORKEXEC: returning setstatus(0)\n")); | ||
2738 | return setstatus(0); | ||
2739 | } | ||
2740 | } else { /* cp != NULL */ | ||
2741 | bltin_name = cp; | ||
2742 | bltin = inbuilt(cp); | ||
2743 | niro | 532 | } |
2744 | } | ||
2745 | |||
2746 | niro | 816 | forked = 0; |
2747 | // We were pointing t->op_words to temporary (expanded) arg list: | ||
2748 | // t->op_words = wp; | ||
2749 | // and restored it later (in execute()), but "break" | ||
2750 | // longjmps away (at "Run builtin" below), leaving t->op_words clobbered! | ||
2751 | // See http://bugs.busybox.net/view.php?id=846. | ||
2752 | // Now we do not touch t->op_words, but separately pass wp as param list | ||
2753 | // to builtins | ||
2754 | DBGPRINTF(("FORKEXEC: bltin %p, no_fork %d, owp %p\n", bltin, | ||
2755 | no_fork, owp)); | ||
2756 | /* Don't fork if it is a lone builtin (not in pipe) | ||
2757 | * OR we are told to _not_ fork */ | ||
2758 | if ((!bltin || pin || pout) /* not lone bltin AND */ | ||
2759 | && !no_fork /* not told to avoid fork */ | ||
2760 | ) { | ||
2761 | /* Save values in case child alters them after vfork */ | ||
2762 | niro | 532 | hpin = pin; |
2763 | hpout = pout; | ||
2764 | hwp = *wp; | ||
2765 | hinteractive = interactive; | ||
2766 | hintr = intr; | ||
2767 | hbrklist = brklist; | ||
2768 | hexecflg = execflg; | ||
2769 | |||
2770 | DBGPRINTF3(("FORKEXEC: calling vfork()...\n")); | ||
2771 | newpid = vfork(); | ||
2772 | if (newpid == -1) { | ||
2773 | niro | 816 | DBGPRINTF(("FORKEXEC: ERROR, can't vfork()!\n")); |
2774 | niro | 532 | return -1; |
2775 | } | ||
2776 | |||
2777 | niro | 816 | if (newpid > 0) { /* Parent */ |
2778 | niro | 532 | /* Restore values */ |
2779 | pin = hpin; | ||
2780 | pout = hpout; | ||
2781 | *wp = hwp; | ||
2782 | interactive = hinteractive; | ||
2783 | intr = hintr; | ||
2784 | brklist = hbrklist; | ||
2785 | execflg = hexecflg; | ||
2786 | |||
2787 | niro | 816 | closepipe(pin); |
2788 | niro | 532 | return (pout == NULL ? setstatus(waitfor(newpid, 0)) : 0); |
2789 | } | ||
2790 | |||
2791 | niro | 816 | /* Child */ |
2792 | DBGPRINTF(("FORKEXEC: child process, bltin=%p (%s)\n", bltin, bltin_name)); | ||
2793 | niro | 532 | if (interactive) { |
2794 | signal(SIGINT, SIG_IGN); | ||
2795 | signal(SIGQUIT, SIG_IGN); | ||
2796 | resetsig = 1; | ||
2797 | } | ||
2798 | interactive = 0; | ||
2799 | intr = 0; | ||
2800 | forked = 1; | ||
2801 | brklist = 0; | ||
2802 | execflg = 0; | ||
2803 | } | ||
2804 | |||
2805 | niro | 816 | if (owp) |
2806 | niro | 532 | while ((cp = *owp++) != NULL && assign(cp, COPYV)) |
2807 | niro | 816 | if (!bltin) |
2808 | niro | 532 | export(lookup(cp)); |
2809 | |||
2810 | niro | 816 | if (pin) { /* NB: close _first_, then move fds! */ |
2811 | close(pin[1]); | ||
2812 | xmove_fd(pin[0], 0); | ||
2813 | niro | 532 | } |
2814 | niro | 816 | if (pout) { |
2815 | close(pout[0]); | ||
2816 | xmove_fd(pout[1], 1); | ||
2817 | niro | 532 | } |
2818 | |||
2819 | iopp = t->ioact; | ||
2820 | niro | 816 | if (iopp) { |
2821 | if (bltin && bltin != doexec) { | ||
2822 | prs(bltin_name); | ||
2823 | err(": can't redirect shell command"); | ||
2824 | niro | 532 | if (forked) |
2825 | _exit(-1); | ||
2826 | return -1; | ||
2827 | } | ||
2828 | niro | 816 | while (*iopp) { |
2829 | niro | 532 | if (iosetup(*iopp++, pin != NULL, pout != NULL)) { |
2830 | niro | 816 | /* system-detected error */ |
2831 | niro | 532 | if (forked) |
2832 | niro | 816 | _exit(-1); |
2833 | return -1; | ||
2834 | niro | 532 | } |
2835 | niro | 816 | } |
2836 | niro | 532 | } |
2837 | |||
2838 | niro | 816 | if (bltin) { |
2839 | if (forked || pin || pout) { | ||
2840 | /* Builtin in pipe: disallowed */ | ||
2841 | /* TODO: allow "exec"? */ | ||
2842 | prs(bltin_name); | ||
2843 | err(": can't run builtin as part of pipe"); | ||
2844 | if (forked) | ||
2845 | _exit(-1); | ||
2846 | return -1; | ||
2847 | } | ||
2848 | /* Run builtin */ | ||
2849 | i = setstatus(bltin(t, wp)); | ||
2850 | niro | 532 | if (forked) |
2851 | _exit(i); | ||
2852 | DBGPRINTF(("FORKEXEC: returning i=%d\n", i)); | ||
2853 | return i; | ||
2854 | } | ||
2855 | |||
2856 | /* should use FIOCEXCL */ | ||
2857 | for (i = FDBASE; i < NOFILE; i++) | ||
2858 | close(i); | ||
2859 | if (resetsig) { | ||
2860 | signal(SIGINT, SIG_DFL); | ||
2861 | signal(SIGQUIT, SIG_DFL); | ||
2862 | } | ||
2863 | |||
2864 | niro | 816 | if (t->op_type == TPAREN) |
2865 | _exit(execute(t->left, NOPIPE, NOPIPE, /* no_fork: */ 1)); | ||
2866 | niro | 532 | if (wp[0] == NULL) |
2867 | niro | 816 | _exit(EXIT_SUCCESS); |
2868 | niro | 532 | |
2869 | cp = rexecve(wp[0], wp, makenv(0, NULL)); | ||
2870 | prs(wp[0]); | ||
2871 | prs(": "); | ||
2872 | err(cp); | ||
2873 | if (!execflg) | ||
2874 | trap[0] = NULL; | ||
2875 | |||
2876 | niro | 816 | DBGPRINTF(("FORKEXEC: calling leave(), pid=%d\n", getpid())); |
2877 | niro | 532 | |
2878 | leave(); | ||
2879 | /* NOTREACHED */ | ||
2880 | niro | 816 | return 0; |
2881 | niro | 532 | } |
2882 | |||
2883 | /* | ||
2884 | * 0< 1> are ignored as required | ||
2885 | * within pipelines. | ||
2886 | */ | ||
2887 | static int iosetup(struct ioword *iop, int pipein, int pipeout) | ||
2888 | { | ||
2889 | int u = -1; | ||
2890 | niro | 816 | char *cp = NULL; |
2891 | const char *msg; | ||
2892 | niro | 532 | |
2893 | DBGPRINTF(("IOSETUP: iop %p, pipein %i, pipeout %i\n", iop, | ||
2894 | pipein, pipeout)); | ||
2895 | |||
2896 | niro | 816 | if (iop->io_fd == IODEFAULT) /* take default */ |
2897 | iop->io_fd = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1; | ||
2898 | niro | 532 | |
2899 | niro | 816 | if (pipein && iop->io_fd == 0) |
2900 | niro | 532 | return 0; |
2901 | |||
2902 | niro | 816 | if (pipeout && iop->io_fd == 1) |
2903 | niro | 532 | return 0; |
2904 | |||
2905 | msg = iop->io_flag & (IOREAD | IOHERE) ? "open" : "create"; | ||
2906 | if ((iop->io_flag & IOHERE) == 0) { | ||
2907 | niro | 816 | cp = iop->io_name; /* huh?? */ |
2908 | cp = evalstr(cp, DOSUB | DOTRIM); | ||
2909 | if (cp == NULL) | ||
2910 | niro | 532 | return 1; |
2911 | } | ||
2912 | |||
2913 | if (iop->io_flag & IODUP) { | ||
2914 | if (cp[1] || (!isdigit(*cp) && *cp != '-')) { | ||
2915 | prs(cp); | ||
2916 | err(": illegal >& argument"); | ||
2917 | return 1; | ||
2918 | } | ||
2919 | if (*cp == '-') | ||
2920 | iop->io_flag = IOCLOSE; | ||
2921 | iop->io_flag &= ~(IOREAD | IOWRITE); | ||
2922 | } | ||
2923 | niro | 816 | |
2924 | niro | 532 | switch (iop->io_flag) { |
2925 | case IOREAD: | ||
2926 | niro | 816 | u = open(cp, O_RDONLY); |
2927 | niro | 532 | break; |
2928 | |||
2929 | case IOHERE: | ||
2930 | case IOHERE | IOXHERE: | ||
2931 | u = herein(iop->io_name, iop->io_flag & IOXHERE); | ||
2932 | niro | 816 | cp = (char*)"here file"; |
2933 | niro | 532 | break; |
2934 | |||
2935 | case IOWRITE | IOCAT: | ||
2936 | niro | 816 | u = open(cp, O_WRONLY); |
2937 | if (u >= 0) { | ||
2938 | niro | 532 | lseek(u, (long) 0, SEEK_END); |
2939 | break; | ||
2940 | } | ||
2941 | niro | 816 | /* fall through to creation if >>file doesn't exist */ |
2942 | |||
2943 | niro | 532 | case IOWRITE: |
2944 | u = creat(cp, 0666); | ||
2945 | break; | ||
2946 | |||
2947 | case IODUP: | ||
2948 | niro | 816 | u = dup2(*cp - '0', iop->io_fd); |
2949 | niro | 532 | break; |
2950 | |||
2951 | case IOCLOSE: | ||
2952 | niro | 816 | close(iop->io_fd); |
2953 | niro | 532 | return 0; |
2954 | } | ||
2955 | niro | 816 | |
2956 | niro | 532 | if (u < 0) { |
2957 | prs(cp); | ||
2958 | niro | 816 | prs(": can't "); |
2959 | niro | 532 | warn(msg); |
2960 | return 1; | ||
2961 | } | ||
2962 | niro | 816 | xmove_fd(u, iop->io_fd); |
2963 | niro | 532 | return 0; |
2964 | } | ||
2965 | |||
2966 | /* | ||
2967 | * Enter a new loop level (marked for break/continue). | ||
2968 | */ | ||
2969 | static void brkset(struct brkcon *bc) | ||
2970 | { | ||
2971 | bc->nextlev = brklist; | ||
2972 | brklist = bc; | ||
2973 | } | ||
2974 | |||
2975 | /* | ||
2976 | * Wait for the last process created. | ||
2977 | * Print a message for each process found | ||
2978 | * that was killed by a signal. | ||
2979 | * Ignore interrupt signals while waiting | ||
2980 | * unless `canintr' is true. | ||
2981 | */ | ||
2982 | static int waitfor(int lastpid, int canintr) | ||
2983 | { | ||
2984 | int pid, rv; | ||
2985 | int s; | ||
2986 | niro | 816 | smallint oheedint = heedint; |
2987 | niro | 532 | |
2988 | heedint = 0; | ||
2989 | rv = 0; | ||
2990 | do { | ||
2991 | pid = wait(&s); | ||
2992 | if (pid == -1) { | ||
2993 | if (errno != EINTR || canintr) | ||
2994 | break; | ||
2995 | } else { | ||
2996 | rv = WAITSIG(s); | ||
2997 | if (rv != 0) { | ||
2998 | niro | 816 | if (rv < ARRAY_SIZE(signame)) { |
2999 | niro | 532 | if (signame[rv] != NULL) { |
3000 | if (pid != lastpid) { | ||
3001 | prn(pid); | ||
3002 | prs(": "); | ||
3003 | } | ||
3004 | prs(signame[rv]); | ||
3005 | } | ||
3006 | } else { | ||
3007 | if (pid != lastpid) { | ||
3008 | prn(pid); | ||
3009 | prs(": "); | ||
3010 | } | ||
3011 | prs("Signal "); | ||
3012 | prn(rv); | ||
3013 | prs(" "); | ||
3014 | } | ||
3015 | if (WAITCORE(s)) | ||
3016 | prs(" - core dumped"); | ||
3017 | niro | 816 | if (rv >= ARRAY_SIZE(signame) || signame[rv]) |
3018 | niro | 532 | prs("\n"); |
3019 | niro | 816 | rv |= 0x80; |
3020 | niro | 532 | } else |
3021 | rv = WAITVAL(s); | ||
3022 | } | ||
3023 | } while (pid != lastpid); | ||
3024 | heedint = oheedint; | ||
3025 | if (intr) { | ||
3026 | if (interactive) { | ||
3027 | if (canintr) | ||
3028 | intr = 0; | ||
3029 | } else { | ||
3030 | if (exstat == 0) | ||
3031 | exstat = rv; | ||
3032 | onintr(0); | ||
3033 | } | ||
3034 | } | ||
3035 | return rv; | ||
3036 | } | ||
3037 | |||
3038 | static int setstatus(int s) | ||
3039 | { | ||
3040 | exstat = s; | ||
3041 | setval(lookup("?"), putn(s)); | ||
3042 | return s; | ||
3043 | } | ||
3044 | |||
3045 | /* | ||
3046 | * PATH-searching interface to execve. | ||
3047 | * If getenv("PATH") were kept up-to-date, | ||
3048 | * execvp might be used. | ||
3049 | */ | ||
3050 | niro | 816 | static const char *rexecve(char *c, char **v, char **envp) |
3051 | niro | 532 | { |
3052 | niro | 816 | const char *sp; |
3053 | char *tp; | ||
3054 | int asis = 0; | ||
3055 | niro | 532 | char *name = c; |
3056 | |||
3057 | niro | 816 | if (ENABLE_FEATURE_SH_STANDALONE) { |
3058 | if (find_applet_by_name(name) >= 0) { | ||
3059 | niro | 532 | /* We have to exec here since we vforked. Running |
3060 | niro | 816 | * run_applet_and_exit() won't work and bad things |
3061 | niro | 532 | * will happen. */ |
3062 | niro | 816 | execve(bb_busybox_exec_path, v, envp); |
3063 | niro | 532 | } |
3064 | } | ||
3065 | |||
3066 | DBGPRINTF(("REXECVE: c=%p, v=%p, envp=%p\n", c, v, envp)); | ||
3067 | |||
3068 | sp = any('/', c) ? "" : path->value; | ||
3069 | niro | 816 | asis = (*sp == '\0'); |
3070 | niro | 532 | while (asis || *sp != '\0') { |
3071 | asis = 0; | ||
3072 | niro | 816 | tp = global_env.linep; |
3073 | for (; *sp != '\0'; tp++) { | ||
3074 | *tp = *sp++; | ||
3075 | if (*tp == ':') { | ||
3076 | asis = (*sp == '\0'); | ||
3077 | niro | 532 | break; |
3078 | } | ||
3079 | niro | 816 | } |
3080 | if (tp != global_env.linep) | ||
3081 | niro | 532 | *tp++ = '/'; |
3082 | niro | 816 | strcpy(tp, c); |
3083 | niro | 532 | |
3084 | niro | 816 | DBGPRINTF3(("REXECVE: global_env.linep is %s\n", global_env.linep)); |
3085 | niro | 532 | |
3086 | niro | 816 | execve(global_env.linep, v, envp); |
3087 | niro | 532 | |
3088 | switch (errno) { | ||
3089 | case ENOEXEC: | ||
3090 | niro | 816 | /* File is executable but file format isnt recognized */ |
3091 | /* Run it as a shell script */ | ||
3092 | /* (execve above didnt do it itself, unlike execvp) */ | ||
3093 | *v = global_env.linep; | ||
3094 | v--; | ||
3095 | tp = *v; | ||
3096 | *v = (char*)DEFAULT_SHELL; | ||
3097 | niro | 532 | execve(DEFAULT_SHELL, v, envp); |
3098 | *v = tp; | ||
3099 | niro | 816 | return "no shell"; |
3100 | niro | 532 | |
3101 | case ENOMEM: | ||
3102 | return (char *) bb_msg_memory_exhausted; | ||
3103 | |||
3104 | case E2BIG: | ||
3105 | return "argument list too long"; | ||
3106 | } | ||
3107 | } | ||
3108 | niro | 816 | if (errno == ENOENT) { |
3109 | exstat = 127; /* standards require this */ | ||
3110 | return "not found"; | ||
3111 | } | ||
3112 | exstat = 126; /* mimic bash */ | ||
3113 | return "can't execute"; | ||
3114 | niro | 532 | } |
3115 | |||
3116 | /* | ||
3117 | * Run the command produced by generator `f' | ||
3118 | * applied to stream `arg'. | ||
3119 | */ | ||
3120 | static int run(struct ioarg *argp, int (*f) (struct ioarg *)) | ||
3121 | { | ||
3122 | struct op *otree; | ||
3123 | struct wdblock *swdlist; | ||
3124 | struct wdblock *siolist; | ||
3125 | jmp_buf ev, rt; | ||
3126 | xint *ofail; | ||
3127 | int rv; | ||
3128 | |||
3129 | #if __GNUC__ | ||
3130 | /* Avoid longjmp clobbering */ | ||
3131 | (void) &rv; | ||
3132 | #endif | ||
3133 | |||
3134 | DBGPRINTF(("RUN: enter, areanum %d, outtree %p, failpt %p\n", | ||
3135 | areanum, outtree, failpt)); | ||
3136 | |||
3137 | areanum++; | ||
3138 | swdlist = wdlist; | ||
3139 | siolist = iolist; | ||
3140 | otree = outtree; | ||
3141 | ofail = failpt; | ||
3142 | rv = -1; | ||
3143 | |||
3144 | errpt = ev; | ||
3145 | if (newenv(setjmp(errpt)) == 0) { | ||
3146 | niro | 816 | wdlist = NULL; |
3147 | iolist = NULL; | ||
3148 | niro | 532 | pushio(argp, f); |
3149 | niro | 816 | global_env.iobase = global_env.iop; |
3150 | niro | 532 | yynerrs = 0; |
3151 | failpt = rt; | ||
3152 | if (setjmp(failpt) == 0 && yyparse() == 0) | ||
3153 | niro | 816 | rv = execute(outtree, NOPIPE, NOPIPE, /* no_fork: */ 0); |
3154 | niro | 532 | quitenv(); |
3155 | } else { | ||
3156 | DBGPRINTF(("RUN: error from newenv()!\n")); | ||
3157 | } | ||
3158 | |||
3159 | wdlist = swdlist; | ||
3160 | iolist = siolist; | ||
3161 | failpt = ofail; | ||
3162 | outtree = otree; | ||
3163 | freearea(areanum--); | ||
3164 | |||
3165 | return rv; | ||
3166 | } | ||
3167 | |||
3168 | /* -------- do.c -------- */ | ||
3169 | |||
3170 | /* | ||
3171 | * built-in commands: doX | ||
3172 | */ | ||
3173 | |||
3174 | niro | 816 | static int dohelp(struct op *t UNUSED_PARAM, char **args UNUSED_PARAM) |
3175 | niro | 532 | { |
3176 | int col; | ||
3177 | const struct builtincmd *x; | ||
3178 | |||
3179 | puts("\nBuilt-in commands:\n" | ||
3180 | "-------------------"); | ||
3181 | |||
3182 | niro | 816 | col = 0; |
3183 | x = builtincmds; | ||
3184 | while (x->name) { | ||
3185 | col += printf("%c%s", ((col == 0) ? '\t' : ' '), x->name); | ||
3186 | niro | 532 | if (col > 60) { |
3187 | niro | 816 | bb_putchar('\n'); |
3188 | niro | 532 | col = 0; |
3189 | } | ||
3190 | niro | 816 | x++; |
3191 | niro | 532 | } |
3192 | niro | 816 | #if ENABLE_FEATURE_SH_STANDALONE |
3193 | niro | 532 | { |
3194 | niro | 816 | const char *applet = applet_names; |
3195 | niro | 532 | |
3196 | niro | 816 | while (*applet) { |
3197 | col += printf("%c%s", ((col == 0) ? '\t' : ' '), applet); | ||
3198 | niro | 532 | if (col > 60) { |
3199 | niro | 816 | bb_putchar('\n'); |
3200 | niro | 532 | col = 0; |
3201 | } | ||
3202 | niro | 816 | applet += strlen(applet) + 1; |
3203 | niro | 532 | } |
3204 | } | ||
3205 | #endif | ||
3206 | puts("\n"); | ||
3207 | return EXIT_SUCCESS; | ||
3208 | } | ||
3209 | |||
3210 | niro | 816 | static int dolabel(struct op *t UNUSED_PARAM, char **args UNUSED_PARAM) |
3211 | niro | 532 | { |
3212 | return 0; | ||
3213 | } | ||
3214 | |||
3215 | niro | 816 | static int dochdir(struct op *t UNUSED_PARAM, char **args) |
3216 | niro | 532 | { |
3217 | niro | 816 | const char *cp, *er; |
3218 | niro | 532 | |
3219 | niro | 816 | cp = args[1]; |
3220 | if (cp == NULL) { | ||
3221 | cp = homedir->value; | ||
3222 | if (cp != NULL) | ||
3223 | goto do_cd; | ||
3224 | niro | 532 | er = ": no home directory"; |
3225 | niro | 816 | } else { |
3226 | do_cd: | ||
3227 | if (chdir(cp) >= 0) | ||
3228 | return 0; | ||
3229 | niro | 532 | er = ": bad directory"; |
3230 | niro | 816 | } |
3231 | niro | 532 | prs(cp != NULL ? cp : "cd"); |
3232 | err(er); | ||
3233 | return 1; | ||
3234 | } | ||
3235 | |||
3236 | niro | 816 | static int doshift(struct op *t UNUSED_PARAM, char **args) |
3237 | niro | 532 | { |
3238 | int n; | ||
3239 | |||
3240 | niro | 816 | n = args[1] ? getn(args[1]) : 1; |
3241 | niro | 532 | if (dolc < n) { |
3242 | err("nothing to shift"); | ||
3243 | return 1; | ||
3244 | } | ||
3245 | dolv[n] = dolv[0]; | ||
3246 | dolv += n; | ||
3247 | dolc -= n; | ||
3248 | setval(lookup("#"), putn(dolc)); | ||
3249 | return 0; | ||
3250 | } | ||
3251 | |||
3252 | /* | ||
3253 | * execute login and newgrp directly | ||
3254 | */ | ||
3255 | niro | 816 | static int dologin(struct op *t UNUSED_PARAM, char **args) |
3256 | niro | 532 | { |
3257 | niro | 816 | const char *cp; |
3258 | niro | 532 | |
3259 | if (interactive) { | ||
3260 | signal(SIGINT, SIG_DFL); | ||
3261 | signal(SIGQUIT, SIG_DFL); | ||
3262 | } | ||
3263 | niro | 816 | cp = rexecve(args[0], args, makenv(0, NULL)); |
3264 | prs(args[0]); | ||
3265 | niro | 532 | prs(": "); |
3266 | err(cp); | ||
3267 | return 1; | ||
3268 | } | ||
3269 | |||
3270 | niro | 816 | static int doumask(struct op *t UNUSED_PARAM, char **args) |
3271 | niro | 532 | { |
3272 | niro | 816 | int i; |
3273 | niro | 532 | char *cp; |
3274 | |||
3275 | niro | 816 | cp = args[1]; |
3276 | niro | 532 | if (cp == NULL) { |
3277 | i = umask(0); | ||
3278 | umask(i); | ||
3279 | niro | 816 | printf("%04o\n", i); |
3280 | niro | 532 | } else { |
3281 | niro | 816 | i = bb_strtou(cp, NULL, 8); |
3282 | if (errno) { | ||
3283 | err("umask: bad octal number"); | ||
3284 | return 1; | ||
3285 | } | ||
3286 | umask(i); | ||
3287 | niro | 532 | } |
3288 | return 0; | ||
3289 | } | ||
3290 | |||
3291 | niro | 816 | static int doexec(struct op *t, char **args) |
3292 | niro | 532 | { |
3293 | jmp_buf ex; | ||
3294 | xint *ofail; | ||
3295 | niro | 816 | char **sv_words; |
3296 | niro | 532 | |
3297 | t->ioact = NULL; | ||
3298 | niro | 816 | if (!args[1]) |
3299 | niro | 532 | return 1; |
3300 | niro | 816 | |
3301 | niro | 532 | execflg = 1; |
3302 | ofail = failpt; | ||
3303 | failpt = ex; | ||
3304 | niro | 816 | |
3305 | sv_words = t->op_words; | ||
3306 | t->op_words = args + 1; | ||
3307 | // TODO: test what will happen with "exec break" - | ||
3308 | // will it leave t->op_words pointing to garbage? | ||
3309 | // (see http://bugs.busybox.net/view.php?id=846) | ||
3310 | niro | 532 | if (setjmp(failpt) == 0) |
3311 | niro | 816 | execute(t, NOPIPE, NOPIPE, /* no_fork: */ 1); |
3312 | t->op_words = sv_words; | ||
3313 | |||
3314 | niro | 532 | failpt = ofail; |
3315 | execflg = 0; | ||
3316 | niro | 816 | |
3317 | niro | 532 | return 1; |
3318 | } | ||
3319 | |||
3320 | niro | 816 | static int dodot(struct op *t UNUSED_PARAM, char **args) |
3321 | niro | 532 | { |
3322 | int i; | ||
3323 | niro | 816 | const char *sp; |
3324 | char *tp; | ||
3325 | niro | 532 | char *cp; |
3326 | int maltmp; | ||
3327 | |||
3328 | niro | 816 | DBGPRINTF(("DODOT: enter, t=%p, tleft %p, tright %p, global_env.linep is %s\n", |
3329 | t, t->left, t->right, ((global_env.linep == NULL) ? "NULL" : global_env.linep))); | ||
3330 | niro | 532 | |
3331 | niro | 816 | cp = args[1]; |
3332 | niro | 532 | if (cp == NULL) { |
3333 | DBGPRINTF(("DODOT: bad args, ret 0\n")); | ||
3334 | return 0; | ||
3335 | } | ||
3336 | niro | 816 | DBGPRINTF(("DODOT: cp is %s\n", cp)); |
3337 | niro | 532 | |
3338 | sp = any('/', cp) ? ":" : path->value; | ||
3339 | |||
3340 | niro | 816 | DBGPRINTF(("DODOT: sp is %s, global_env.linep is %s\n", |
3341 | niro | 532 | ((sp == NULL) ? "NULL" : sp), |
3342 | niro | 816 | ((global_env.linep == NULL) ? "NULL" : global_env.linep))); |
3343 | niro | 532 | |
3344 | while (*sp) { | ||
3345 | niro | 816 | tp = global_env.linep; |
3346 | niro | 532 | while (*sp && (*tp = *sp++) != ':') |
3347 | tp++; | ||
3348 | niro | 816 | if (tp != global_env.linep) |
3349 | niro | 532 | *tp++ = '/'; |
3350 | niro | 816 | strcpy(tp, cp); |
3351 | niro | 532 | |
3352 | /* Original code */ | ||
3353 | niro | 816 | i = open(global_env.linep, O_RDONLY); |
3354 | niro | 532 | if (i >= 0) { |
3355 | exstat = 0; | ||
3356 | maltmp = remap(i); | ||
3357 | niro | 816 | DBGPRINTF(("DODOT: remap=%d, exstat=%d, global_env.iofd %d, i %d, global_env.linep is %s\n", |
3358 | maltmp, exstat, global_env.iofd, i, global_env.linep)); | ||
3359 | niro | 532 | |
3360 | next(maltmp); /* Basically a PUSHIO */ | ||
3361 | |||
3362 | DBGPRINTF(("DODOT: returning exstat=%d\n", exstat)); | ||
3363 | |||
3364 | return exstat; | ||
3365 | } | ||
3366 | niro | 816 | } /* while */ |
3367 | niro | 532 | |
3368 | prs(cp); | ||
3369 | err(": not found"); | ||
3370 | |||
3371 | return -1; | ||
3372 | } | ||
3373 | |||
3374 | niro | 816 | static int dowait(struct op *t UNUSED_PARAM, char **args) |
3375 | niro | 532 | { |
3376 | int i; | ||
3377 | char *cp; | ||
3378 | |||
3379 | niro | 816 | cp = args[1]; |
3380 | niro | 532 | if (cp != NULL) { |
3381 | i = getn(cp); | ||
3382 | if (i == 0) | ||
3383 | return 0; | ||
3384 | } else | ||
3385 | i = -1; | ||
3386 | setstatus(waitfor(i, 1)); | ||
3387 | return 0; | ||
3388 | } | ||
3389 | |||
3390 | niro | 816 | static int doread(struct op *t UNUSED_PARAM, char **args) |
3391 | niro | 532 | { |
3392 | char *cp, **wp; | ||
3393 | int nb = 0; | ||
3394 | int nl = 0; | ||
3395 | |||
3396 | niro | 816 | if (args[1] == NULL) { |
3397 | niro | 532 | err("Usage: read name ..."); |
3398 | return 1; | ||
3399 | } | ||
3400 | niro | 816 | for (wp = args + 1; *wp; wp++) { |
3401 | for (cp = global_env.linep; !nl && cp < elinep - 1; cp++) { | ||
3402 | nb = nonblock_safe_read(STDIN_FILENO, cp, sizeof(*cp)); | ||
3403 | if (nb != sizeof(*cp)) | ||
3404 | niro | 532 | break; |
3405 | niro | 816 | nl = (*cp == '\n'); |
3406 | if (nl || (wp[1] && any(*cp, ifs->value))) | ||
3407 | break; | ||
3408 | niro | 532 | } |
3409 | niro | 816 | *cp = '\0'; |
3410 | niro | 532 | if (nb <= 0) |
3411 | break; | ||
3412 | niro | 816 | setval(lookup(*wp), global_env.linep); |
3413 | niro | 532 | } |
3414 | return nb <= 0; | ||
3415 | } | ||
3416 | |||
3417 | niro | 816 | static int doeval(struct op *t UNUSED_PARAM, char **args) |
3418 | niro | 532 | { |
3419 | niro | 816 | return RUN(awordlist, args + 1, wdchar); |
3420 | niro | 532 | } |
3421 | |||
3422 | niro | 816 | static int dotrap(struct op *t UNUSED_PARAM, char **args) |
3423 | niro | 532 | { |
3424 | int n, i; | ||
3425 | int resetsig; | ||
3426 | |||
3427 | niro | 816 | if (args[1] == NULL) { |
3428 | niro | 532 | for (i = 0; i <= _NSIG; i++) |
3429 | if (trap[i]) { | ||
3430 | prn(i); | ||
3431 | prs(": "); | ||
3432 | prs(trap[i]); | ||
3433 | prs("\n"); | ||
3434 | } | ||
3435 | return 0; | ||
3436 | } | ||
3437 | niro | 816 | resetsig = isdigit(args[1][0]); |
3438 | for (i = resetsig ? 1 : 2; args[i] != NULL; ++i) { | ||
3439 | n = getsig(args[i]); | ||
3440 | niro | 532 | freecell(trap[n]); |
3441 | trap[n] = 0; | ||
3442 | if (!resetsig) { | ||
3443 | niro | 816 | if (args[1][0] != '\0') { |
3444 | trap[n] = strsave(args[1], 0); | ||
3445 | niro | 532 | setsig(n, sig); |
3446 | } else | ||
3447 | setsig(n, SIG_IGN); | ||
3448 | } else { | ||
3449 | niro | 816 | if (interactive) { |
3450 | niro | 532 | if (n == SIGINT) |
3451 | setsig(n, onintr); | ||
3452 | else | ||
3453 | setsig(n, n == SIGQUIT ? SIG_IGN : SIG_DFL); | ||
3454 | niro | 816 | } else |
3455 | niro | 532 | setsig(n, SIG_DFL); |
3456 | } | ||
3457 | } | ||
3458 | return 0; | ||
3459 | } | ||
3460 | |||
3461 | static int getsig(char *s) | ||
3462 | { | ||
3463 | int n; | ||
3464 | |||
3465 | n = getn(s); | ||
3466 | if (n < 0 || n > _NSIG) { | ||
3467 | err("trap: bad signal number"); | ||
3468 | n = 0; | ||
3469 | } | ||
3470 | return n; | ||
3471 | } | ||
3472 | |||
3473 | static void setsig(int n, sighandler_t f) | ||
3474 | { | ||
3475 | if (n == 0) | ||
3476 | return; | ||
3477 | if (signal(n, SIG_IGN) != SIG_IGN || ourtrap[n]) { | ||
3478 | ourtrap[n] = 1; | ||
3479 | signal(n, f); | ||
3480 | } | ||
3481 | } | ||
3482 | |||
3483 | static int getn(char *as) | ||
3484 | { | ||
3485 | char *s; | ||
3486 | int n, m; | ||
3487 | |||
3488 | s = as; | ||
3489 | m = 1; | ||
3490 | if (*s == '-') { | ||
3491 | m = -1; | ||
3492 | s++; | ||
3493 | } | ||
3494 | for (n = 0; isdigit(*s); s++) | ||
3495 | n = (n * 10) + (*s - '0'); | ||
3496 | if (*s) { | ||
3497 | prs(as); | ||
3498 | err(": bad number"); | ||
3499 | } | ||
3500 | return n * m; | ||
3501 | } | ||
3502 | |||
3503 | niro | 816 | static int dobreak(struct op *t UNUSED_PARAM, char **args) |
3504 | niro | 532 | { |
3505 | niro | 816 | return brkcontin(args[1], 1); |
3506 | niro | 532 | } |
3507 | |||
3508 | niro | 816 | static int docontinue(struct op *t UNUSED_PARAM, char **args) |
3509 | niro | 532 | { |
3510 | niro | 816 | return brkcontin(args[1], 0); |
3511 | niro | 532 | } |
3512 | |||
3513 | static int brkcontin(char *cp, int val) | ||
3514 | { | ||
3515 | struct brkcon *bc; | ||
3516 | int nl; | ||
3517 | |||
3518 | nl = cp == NULL ? 1 : getn(cp); | ||
3519 | if (nl <= 0) | ||
3520 | nl = 999; | ||
3521 | do { | ||
3522 | niro | 816 | bc = brklist; |
3523 | if (bc == NULL) | ||
3524 | niro | 532 | break; |
3525 | brklist = bc->nextlev; | ||
3526 | } while (--nl); | ||
3527 | if (nl) { | ||
3528 | err("bad break/continue level"); | ||
3529 | return 1; | ||
3530 | } | ||
3531 | niro | 816 | isbreak = (val != 0); |
3532 | niro | 532 | longjmp(bc->brkpt, 1); |
3533 | /* NOTREACHED */ | ||
3534 | } | ||
3535 | |||
3536 | niro | 816 | static int doexit(struct op *t UNUSED_PARAM, char **args) |
3537 | niro | 532 | { |
3538 | char *cp; | ||
3539 | |||
3540 | execflg = 0; | ||
3541 | niro | 816 | cp = args[1]; |
3542 | if (cp != NULL) | ||
3543 | niro | 532 | setstatus(getn(cp)); |
3544 | |||
3545 | DBGPRINTF(("DOEXIT: calling leave(), t=%p\n", t)); | ||
3546 | |||
3547 | leave(); | ||
3548 | /* NOTREACHED */ | ||
3549 | return 0; | ||
3550 | } | ||
3551 | |||
3552 | niro | 816 | static int doexport(struct op *t UNUSED_PARAM, char **args) |
3553 | niro | 532 | { |
3554 | niro | 816 | rdexp(args + 1, export, EXPORT); |
3555 | niro | 532 | return 0; |
3556 | } | ||
3557 | |||
3558 | niro | 816 | static int doreadonly(struct op *t UNUSED_PARAM, char **args) |
3559 | niro | 532 | { |
3560 | niro | 816 | rdexp(args + 1, ronly, RONLY); |
3561 | niro | 532 | return 0; |
3562 | } | ||
3563 | |||
3564 | static void rdexp(char **wp, void (*f) (struct var *), int key) | ||
3565 | { | ||
3566 | DBGPRINTF6(("RDEXP: enter, wp=%p, func=%p, key=%d\n", wp, f, key)); | ||
3567 | DBGPRINTF6(("RDEXP: *wp=%s\n", *wp)); | ||
3568 | |||
3569 | if (*wp != NULL) { | ||
3570 | for (; *wp != NULL; wp++) { | ||
3571 | if (isassign(*wp)) { | ||
3572 | char *cp; | ||
3573 | |||
3574 | assign(*wp, COPYV); | ||
3575 | niro | 816 | for (cp = *wp; *cp != '='; cp++) |
3576 | continue; | ||
3577 | niro | 532 | *cp = '\0'; |
3578 | } | ||
3579 | if (checkname(*wp)) | ||
3580 | (*f) (lookup(*wp)); | ||
3581 | else | ||
3582 | badid(*wp); | ||
3583 | } | ||
3584 | } else | ||
3585 | putvlist(key, 1); | ||
3586 | } | ||
3587 | |||
3588 | static void badid(char *s) | ||
3589 | { | ||
3590 | prs(s); | ||
3591 | err(": bad identifier"); | ||
3592 | } | ||
3593 | |||
3594 | niro | 816 | static int doset(struct op *t UNUSED_PARAM, char **args) |
3595 | niro | 532 | { |
3596 | struct var *vp; | ||
3597 | char *cp; | ||
3598 | int n; | ||
3599 | |||
3600 | niro | 816 | cp = args[1]; |
3601 | niro | 532 | if (cp == NULL) { |
3602 | for (vp = vlist; vp; vp = vp->next) | ||
3603 | varput(vp->name, 1); | ||
3604 | return 0; | ||
3605 | } | ||
3606 | if (*cp == '-') { | ||
3607 | niro | 816 | args++; |
3608 | niro | 532 | if (*++cp == 0) |
3609 | niro | 816 | FLAG['x'] = FLAG['v'] = 0; |
3610 | else { | ||
3611 | for (; *cp; cp++) { | ||
3612 | niro | 532 | switch (*cp) { |
3613 | case 'e': | ||
3614 | if (!interactive) | ||
3615 | niro | 816 | FLAG['e']++; |
3616 | niro | 532 | break; |
3617 | |||
3618 | default: | ||
3619 | if (*cp >= 'a' && *cp <= 'z') | ||
3620 | niro | 816 | FLAG[(int) *cp]++; |
3621 | niro | 532 | break; |
3622 | } | ||
3623 | niro | 816 | } |
3624 | } | ||
3625 | niro | 532 | setdash(); |
3626 | } | ||
3627 | niro | 816 | if (args[1]) { |
3628 | args[0] = dolv[0]; | ||
3629 | for (n = 1; args[n]; n++) | ||
3630 | setarea((char *) args[n], 0); | ||
3631 | niro | 532 | dolc = n - 1; |
3632 | niro | 816 | dolv = args; |
3633 | niro | 532 | setval(lookup("#"), putn(dolc)); |
3634 | setarea((char *) (dolv - 1), 0); | ||
3635 | } | ||
3636 | return 0; | ||
3637 | } | ||
3638 | |||
3639 | static void varput(char *s, int out) | ||
3640 | { | ||
3641 | if (isalnum(*s) || *s == '_') { | ||
3642 | write(out, s, strlen(s)); | ||
3643 | write(out, "\n", 1); | ||
3644 | } | ||
3645 | } | ||
3646 | |||
3647 | |||
3648 | /* | ||
3649 | * Copyright (c) 1999 Herbert Xu <herbert@debian.org> | ||
3650 | * This file contains code for the times builtin. | ||
3651 | */ | ||
3652 | niro | 816 | static void times_fmt(char *buf, clock_t val, unsigned clk_tck) |
3653 | niro | 532 | { |
3654 | niro | 816 | unsigned min, sec; |
3655 | if (sizeof(val) > sizeof(int)) | ||
3656 | sec = ((unsigned long)val) / clk_tck; | ||
3657 | else | ||
3658 | sec = ((unsigned)val) / clk_tck; | ||
3659 | min = sec / 60; | ||
3660 | #if ENABLE_DESKTOP | ||
3661 | sprintf(buf, "%um%u.%03us", min, (sec - min * 60), | ||
3662 | /* msec: */ ((unsigned)(val - (clock_t)sec * clk_tck)) * 1000 / clk_tck | ||
3663 | ); | ||
3664 | #else | ||
3665 | sprintf(buf, "%um%us", min, (sec - min * 60)); | ||
3666 | #endif | ||
3667 | } | ||
3668 | |||
3669 | static int dotimes(struct op *t UNUSED_PARAM, char **args UNUSED_PARAM) | ||
3670 | { | ||
3671 | niro | 532 | struct tms buf; |
3672 | niro | 816 | unsigned clk_tck = sysconf(_SC_CLK_TCK); |
3673 | /* How much do we need for "NmN.NNNs" ? */ | ||
3674 | enum { TIMEBUF_SIZE = sizeof(int)*3 + sizeof(int)*3 + 6 }; | ||
3675 | char u[TIMEBUF_SIZE], s[TIMEBUF_SIZE]; | ||
3676 | char cu[TIMEBUF_SIZE], cs[TIMEBUF_SIZE]; | ||
3677 | niro | 532 | |
3678 | times(&buf); | ||
3679 | niro | 816 | |
3680 | times_fmt(u, buf.tms_utime, clk_tck); | ||
3681 | times_fmt(s, buf.tms_stime, clk_tck); | ||
3682 | times_fmt(cu, buf.tms_cutime, clk_tck); | ||
3683 | times_fmt(cs, buf.tms_cstime, clk_tck); | ||
3684 | |||
3685 | printf("%s %s\n%s %s\n", u, s, cu, cs); | ||
3686 | niro | 532 | return 0; |
3687 | } | ||
3688 | |||
3689 | |||
3690 | /* -------- eval.c -------- */ | ||
3691 | |||
3692 | /* | ||
3693 | * ${} | ||
3694 | * `command` | ||
3695 | * blank interpretation | ||
3696 | * quoting | ||
3697 | * glob | ||
3698 | */ | ||
3699 | |||
3700 | static char **eval(char **ap, int f) | ||
3701 | { | ||
3702 | struct wdblock *wb; | ||
3703 | char **wp; | ||
3704 | char **wf; | ||
3705 | jmp_buf ev; | ||
3706 | |||
3707 | #if __GNUC__ | ||
3708 | /* Avoid longjmp clobbering */ | ||
3709 | (void) ℘ | ||
3710 | (void) ≈ | ||
3711 | #endif | ||
3712 | |||
3713 | DBGPRINTF4(("EVAL: enter, f=%d\n", f)); | ||
3714 | |||
3715 | wp = NULL; | ||
3716 | wb = NULL; | ||
3717 | wf = NULL; | ||
3718 | errpt = ev; | ||
3719 | if (newenv(setjmp(errpt)) == 0) { | ||
3720 | while (*ap && isassign(*ap)) | ||
3721 | expand(*ap++, &wb, f & ~DOGLOB); | ||
3722 | niro | 816 | if (FLAG['k']) { |
3723 | niro | 532 | for (wf = ap; *wf; wf++) { |
3724 | if (isassign(*wf)) | ||
3725 | expand(*wf, &wb, f & ~DOGLOB); | ||
3726 | } | ||
3727 | } | ||
3728 | niro | 816 | for (wb = addword((char *) NULL, wb); *ap; ap++) { |
3729 | if (!FLAG['k'] || !isassign(*ap)) | ||
3730 | niro | 532 | expand(*ap, &wb, f & ~DOKEY); |
3731 | } | ||
3732 | wb = addword((char *) 0, wb); | ||
3733 | wp = getwords(wb); | ||
3734 | quitenv(); | ||
3735 | } else | ||
3736 | gflg = 1; | ||
3737 | |||
3738 | return gflg ? (char **) NULL : wp; | ||
3739 | } | ||
3740 | |||
3741 | niro | 816 | |
3742 | niro | 532 | /* |
3743 | * Make the exported environment from the exported | ||
3744 | * names in the dictionary. Keyword assignments | ||
3745 | * will already have been done. | ||
3746 | */ | ||
3747 | static char **makenv(int all, struct wdblock *wb) | ||
3748 | { | ||
3749 | struct var *vp; | ||
3750 | |||
3751 | DBGPRINTF5(("MAKENV: enter, all=%d\n", all)); | ||
3752 | |||
3753 | for (vp = vlist; vp; vp = vp->next) | ||
3754 | if (all || vp->status & EXPORT) | ||
3755 | wb = addword(vp->name, wb); | ||
3756 | wb = addword((char *) 0, wb); | ||
3757 | return getwords(wb); | ||
3758 | } | ||
3759 | |||
3760 | niro | 816 | static int expand(const char *cp, struct wdblock **wbp, int f) |
3761 | niro | 532 | { |
3762 | jmp_buf ev; | ||
3763 | niro | 816 | char *xp; |
3764 | niro | 532 | |
3765 | #if __GNUC__ | ||
3766 | /* Avoid longjmp clobbering */ | ||
3767 | (void) &cp; | ||
3768 | #endif | ||
3769 | |||
3770 | DBGPRINTF3(("EXPAND: enter, f=%d\n", f)); | ||
3771 | |||
3772 | gflg = 0; | ||
3773 | |||
3774 | if (cp == NULL) | ||
3775 | return 0; | ||
3776 | |||
3777 | niro | 816 | if (!anys("$`'\"", cp) && !anys(ifs->value, cp) |
3778 | && ((f & DOGLOB) == 0 || !anys("[*?", cp)) | ||
3779 | ) { | ||
3780 | xp = strsave(cp, areanum); | ||
3781 | niro | 532 | if (f & DOTRIM) |
3782 | niro | 816 | unquote(xp); |
3783 | *wbp = addword(xp, *wbp); | ||
3784 | niro | 532 | return 1; |
3785 | } | ||
3786 | niro | 816 | errpt = ev; |
3787 | if (newenv(setjmp(errpt)) == 0) { | ||
3788 | niro | 532 | PUSHIO(aword, cp, strchar); |
3789 | niro | 816 | global_env.iobase = global_env.iop; |
3790 | while ((xp = blank(f)) && gflg == 0) { | ||
3791 | global_env.linep = xp; | ||
3792 | xp = strsave(xp, areanum); | ||
3793 | niro | 532 | if ((f & DOGLOB) == 0) { |
3794 | if (f & DOTRIM) | ||
3795 | niro | 816 | unquote(xp); |
3796 | *wbp = addword(xp, *wbp); | ||
3797 | niro | 532 | } else |
3798 | niro | 816 | *wbp = glob(xp, *wbp); |
3799 | niro | 532 | } |
3800 | quitenv(); | ||
3801 | } else | ||
3802 | gflg = 1; | ||
3803 | return gflg == 0; | ||
3804 | } | ||
3805 | |||
3806 | niro | 816 | static char *evalstr(char *cp, int f) |
3807 | { | ||
3808 | struct wdblock *wb; | ||
3809 | |||
3810 | DBGPRINTF6(("EVALSTR: enter, cp=%p, f=%d\n", cp, f)); | ||
3811 | |||
3812 | wb = NULL; | ||
3813 | if (expand(cp, &wb, f)) { | ||
3814 | if (wb == NULL || wb->w_nword == 0 | ||
3815 | || (cp = wb->w_words[0]) == NULL | ||
3816 | ) { | ||
3817 | // TODO: I suspect that | ||
3818 | // char *evalstr(char *cp, int f) is actually | ||
3819 | // const char *evalstr(const char *cp, int f)! | ||
3820 | cp = (char*)""; | ||
3821 | } | ||
3822 | DELETE(wb); | ||
3823 | } else | ||
3824 | cp = NULL; | ||
3825 | return cp; | ||
3826 | } | ||
3827 | |||
3828 | |||
3829 | niro | 532 | /* |
3830 | * Blank interpretation and quoting | ||
3831 | */ | ||
3832 | static char *blank(int f) | ||
3833 | { | ||
3834 | int c, c1; | ||
3835 | char *sp; | ||
3836 | int scanequals, foundequals; | ||
3837 | |||
3838 | DBGPRINTF3(("BLANK: enter, f=%d\n", f)); | ||
3839 | |||
3840 | niro | 816 | sp = global_env.linep; |
3841 | niro | 532 | scanequals = f & DOKEY; |
3842 | foundequals = 0; | ||
3843 | |||
3844 | loop: | ||
3845 | c = subgetc('"', foundequals); | ||
3846 | switch (c) { | ||
3847 | case 0: | ||
3848 | niro | 816 | if (sp == global_env.linep) |
3849 | niro | 532 | return 0; |
3850 | niro | 816 | *global_env.linep++ = 0; |
3851 | niro | 532 | return sp; |
3852 | |||
3853 | default: | ||
3854 | if (f & DOBLANK && any(c, ifs->value)) | ||
3855 | goto loop; | ||
3856 | break; | ||
3857 | |||
3858 | case '"': | ||
3859 | case '\'': | ||
3860 | scanequals = 0; | ||
3861 | if (INSUB()) | ||
3862 | break; | ||
3863 | for (c1 = c; (c = subgetc(c1, 1)) != c1;) { | ||
3864 | if (c == 0) | ||
3865 | break; | ||
3866 | if (c == '\'' || !any(c, "$`\"")) | ||
3867 | c |= QUOTE; | ||
3868 | niro | 816 | *global_env.linep++ = c; |
3869 | niro | 532 | } |
3870 | c = 0; | ||
3871 | } | ||
3872 | unget(c); | ||
3873 | if (!isalpha(c) && c != '_') | ||
3874 | scanequals = 0; | ||
3875 | for (;;) { | ||
3876 | c = subgetc('"', foundequals); | ||
3877 | if (c == 0 || | ||
3878 | f & (DOBLANK && any(c, ifs->value)) || | ||
3879 | (!INSUB() && any(c, "\"'"))) { | ||
3880 | scanequals = 0; | ||
3881 | unget(c); | ||
3882 | if (any(c, "\"'")) | ||
3883 | goto loop; | ||
3884 | break; | ||
3885 | } | ||
3886 | if (scanequals) { | ||
3887 | if (c == '=') { | ||
3888 | foundequals = 1; | ||
3889 | scanequals = 0; | ||
3890 | } else if (!isalnum(c) && c != '_') | ||
3891 | scanequals = 0; | ||
3892 | } | ||
3893 | niro | 816 | *global_env.linep++ = c; |
3894 | niro | 532 | } |
3895 | niro | 816 | *global_env.linep++ = 0; |
3896 | niro | 532 | return sp; |
3897 | } | ||
3898 | |||
3899 | /* | ||
3900 | * Get characters, substituting for ` and $ | ||
3901 | */ | ||
3902 | static int subgetc(char ec, int quoted) | ||
3903 | { | ||
3904 | char c; | ||
3905 | |||
3906 | DBGPRINTF3(("SUBGETC: enter, quoted=%d\n", quoted)); | ||
3907 | |||
3908 | again: | ||
3909 | c = my_getc(ec); | ||
3910 | if (!INSUB() && ec != '\'') { | ||
3911 | if (c == '`') { | ||
3912 | if (grave(quoted) == 0) | ||
3913 | return 0; | ||
3914 | niro | 816 | global_env.iop->task = XGRAVE; |
3915 | niro | 532 | goto again; |
3916 | } | ||
3917 | niro | 816 | if (c == '$') { |
3918 | c = dollar(quoted); | ||
3919 | if (c == 0) { | ||
3920 | global_env.iop->task = XDOLL; | ||
3921 | goto again; | ||
3922 | } | ||
3923 | niro | 532 | } |
3924 | } | ||
3925 | return c; | ||
3926 | } | ||
3927 | |||
3928 | /* | ||
3929 | * Prepare to generate the string returned by ${} substitution. | ||
3930 | */ | ||
3931 | static int dollar(int quoted) | ||
3932 | { | ||
3933 | int otask; | ||
3934 | struct io *oiop; | ||
3935 | char *dolp; | ||
3936 | char *s, c, *cp = NULL; | ||
3937 | struct var *vp; | ||
3938 | |||
3939 | DBGPRINTF3(("DOLLAR: enter, quoted=%d\n", quoted)); | ||
3940 | |||
3941 | c = readc(); | ||
3942 | niro | 816 | s = global_env.linep; |
3943 | niro | 532 | if (c != '{') { |
3944 | niro | 816 | *global_env.linep++ = c; |
3945 | niro | 532 | if (isalpha(c) || c == '_') { |
3946 | while ((c = readc()) != 0 && (isalnum(c) || c == '_')) | ||
3947 | niro | 816 | if (global_env.linep < elinep) |
3948 | *global_env.linep++ = c; | ||
3949 | niro | 532 | unget(c); |
3950 | } | ||
3951 | c = 0; | ||
3952 | } else { | ||
3953 | niro | 816 | oiop = global_env.iop; |
3954 | otask = global_env.iop->task; | ||
3955 | niro | 532 | |
3956 | niro | 816 | global_env.iop->task = XOTHER; |
3957 | niro | 532 | while ((c = subgetc('"', 0)) != 0 && c != '}' && c != '\n') |
3958 | niro | 816 | if (global_env.linep < elinep) |
3959 | *global_env.linep++ = c; | ||
3960 | if (oiop == global_env.iop) | ||
3961 | global_env.iop->task = otask; | ||
3962 | niro | 532 | if (c != '}') { |
3963 | err("unclosed ${"); | ||
3964 | niro | 816 | gflg = 1; |
3965 | niro | 532 | return c; |
3966 | } | ||
3967 | } | ||
3968 | niro | 816 | if (global_env.linep >= elinep) { |
3969 | niro | 532 | err("string in ${} too long"); |
3970 | niro | 816 | gflg = 1; |
3971 | global_env.linep -= 10; | ||
3972 | niro | 532 | } |
3973 | niro | 816 | *global_env.linep = 0; |
3974 | niro | 532 | if (*s) |
3975 | for (cp = s + 1; *cp; cp++) | ||
3976 | if (any(*cp, "=-+?")) { | ||
3977 | c = *cp; | ||
3978 | *cp++ = 0; | ||
3979 | break; | ||
3980 | } | ||
3981 | if (s[1] == 0 && (*s == '*' || *s == '@')) { | ||
3982 | if (dolc > 1) { | ||
3983 | /* currently this does not distinguish $* and $@ */ | ||
3984 | /* should check dollar */ | ||
3985 | niro | 816 | global_env.linep = s; |
3986 | niro | 532 | PUSHIO(awordlist, dolv + 1, dolchar); |
3987 | return 0; | ||
3988 | } else { /* trap the nasty ${=} */ | ||
3989 | s[0] = '1'; | ||
3990 | niro | 816 | s[1] = '\0'; |
3991 | niro | 532 | } |
3992 | } | ||
3993 | vp = lookup(s); | ||
3994 | niro | 816 | dolp = vp->value; |
3995 | if (dolp == null) { | ||
3996 | niro | 532 | switch (c) { |
3997 | case '=': | ||
3998 | if (isdigit(*s)) { | ||
3999 | niro | 816 | err("can't use ${...=...} with $n"); |
4000 | gflg = 1; | ||
4001 | niro | 532 | break; |
4002 | } | ||
4003 | setval(vp, cp); | ||
4004 | dolp = vp->value; | ||
4005 | break; | ||
4006 | |||
4007 | case '-': | ||
4008 | dolp = strsave(cp, areanum); | ||
4009 | break; | ||
4010 | |||
4011 | case '?': | ||
4012 | if (*cp == 0) { | ||
4013 | prs("missing value for "); | ||
4014 | err(s); | ||
4015 | } else | ||
4016 | err(cp); | ||
4017 | niro | 816 | gflg = 1; |
4018 | niro | 532 | break; |
4019 | } | ||
4020 | } else if (c == '+') | ||
4021 | dolp = strsave(cp, areanum); | ||
4022 | niro | 816 | if (FLAG['u'] && dolp == null) { |
4023 | niro | 532 | prs("unset variable: "); |
4024 | err(s); | ||
4025 | niro | 816 | gflg = 1; |
4026 | niro | 532 | } |
4027 | niro | 816 | global_env.linep = s; |
4028 | niro | 532 | PUSHIO(aword, dolp, quoted ? qstrchar : strchar); |
4029 | return 0; | ||
4030 | } | ||
4031 | |||
4032 | /* | ||
4033 | * Run the command in `...` and read its output. | ||
4034 | */ | ||
4035 | |||
4036 | static int grave(int quoted) | ||
4037 | { | ||
4038 | niro | 816 | /* moved to G: static char child_cmd[LINELIM]; */ |
4039 | |||
4040 | const char *cp; | ||
4041 | niro | 532 | int i; |
4042 | int j; | ||
4043 | int pf[2]; | ||
4044 | niro | 816 | const char *src; |
4045 | niro | 532 | char *dest; |
4046 | int count; | ||
4047 | int ignore; | ||
4048 | int ignore_once; | ||
4049 | char *argument_list[4]; | ||
4050 | struct wdblock *wb = NULL; | ||
4051 | |||
4052 | #if __GNUC__ | ||
4053 | /* Avoid longjmp clobbering */ | ||
4054 | (void) &cp; | ||
4055 | #endif | ||
4056 | |||
4057 | niro | 816 | for (cp = global_env.iop->argp->aword; *cp != '`'; cp++) { |
4058 | niro | 532 | if (*cp == 0) { |
4059 | err("no closing `"); | ||
4060 | return 0; | ||
4061 | } | ||
4062 | niro | 816 | } |
4063 | niro | 532 | |
4064 | /* string copy with dollar expansion */ | ||
4065 | niro | 816 | src = global_env.iop->argp->aword; |
4066 | niro | 532 | dest = child_cmd; |
4067 | count = 0; | ||
4068 | ignore = 0; | ||
4069 | ignore_once = 0; | ||
4070 | while ((*src != '`') && (count < LINELIM)) { | ||
4071 | if (*src == '\'') | ||
4072 | ignore = !ignore; | ||
4073 | if (*src == '\\') | ||
4074 | ignore_once = 1; | ||
4075 | if (*src == '$' && !ignore && !ignore_once) { | ||
4076 | struct var *vp; | ||
4077 | niro | 816 | /* moved to G to reduce stack usage |
4078 | niro | 532 | char var_name[LINELIM]; |
4079 | char alt_value[LINELIM]; | ||
4080 | niro | 816 | */ |
4081 | #define var_name (G.grave__var_name) | ||
4082 | #define alt_value (G.grave__alt_value) | ||
4083 | niro | 532 | int var_index = 0; |
4084 | int alt_index = 0; | ||
4085 | char operator = 0; | ||
4086 | int braces = 0; | ||
4087 | char *value; | ||
4088 | |||
4089 | src++; | ||
4090 | if (*src == '{') { | ||
4091 | braces = 1; | ||
4092 | src++; | ||
4093 | } | ||
4094 | |||
4095 | var_name[var_index++] = *src++; | ||
4096 | while (isalnum(*src) || *src=='_') | ||
4097 | var_name[var_index++] = *src++; | ||
4098 | var_name[var_index] = 0; | ||
4099 | |||
4100 | if (braces) { | ||
4101 | switch (*src) { | ||
4102 | case '}': | ||
4103 | break; | ||
4104 | case '-': | ||
4105 | case '=': | ||
4106 | case '+': | ||
4107 | case '?': | ||
4108 | operator = * src; | ||
4109 | break; | ||
4110 | default: | ||
4111 | err("unclosed ${\n"); | ||
4112 | return 0; | ||
4113 | } | ||
4114 | if (operator) { | ||
4115 | src++; | ||
4116 | while (*src && (*src != '}')) { | ||
4117 | alt_value[alt_index++] = *src++; | ||
4118 | } | ||
4119 | alt_value[alt_index] = 0; | ||
4120 | if (*src != '}') { | ||
4121 | err("unclosed ${\n"); | ||
4122 | return 0; | ||
4123 | } | ||
4124 | } | ||
4125 | src++; | ||
4126 | } | ||
4127 | |||
4128 | if (isalpha(*var_name)) { | ||
4129 | /* let subshell handle it instead */ | ||
4130 | |||
4131 | char *namep = var_name; | ||
4132 | |||
4133 | *dest++ = '$'; | ||
4134 | if (braces) | ||
4135 | *dest++ = '{'; | ||
4136 | while (*namep) | ||
4137 | *dest++ = *namep++; | ||
4138 | if (operator) { | ||
4139 | char *altp = alt_value; | ||
4140 | *dest++ = operator; | ||
4141 | while (*altp) | ||
4142 | *dest++ = *altp++; | ||
4143 | } | ||
4144 | if (braces) | ||
4145 | *dest++ = '}'; | ||
4146 | |||
4147 | wb = addword(lookup(var_name)->name, wb); | ||
4148 | } else { | ||
4149 | /* expand */ | ||
4150 | |||
4151 | vp = lookup(var_name); | ||
4152 | if (vp->value != null) | ||
4153 | value = (operator == '+') ? | ||
4154 | alt_value : vp->value; | ||
4155 | else if (operator == '?') { | ||
4156 | err(alt_value); | ||
4157 | return 0; | ||
4158 | } else if (alt_index && (operator != '+')) { | ||
4159 | value = alt_value; | ||
4160 | if (operator == '=') | ||
4161 | setval(vp, value); | ||
4162 | } else | ||
4163 | continue; | ||
4164 | |||
4165 | while (*value && (count < LINELIM)) { | ||
4166 | *dest++ = *value++; | ||
4167 | count++; | ||
4168 | } | ||
4169 | } | ||
4170 | niro | 816 | #undef var_name |
4171 | #undef alt_value | ||
4172 | niro | 532 | } else { |
4173 | *dest++ = *src++; | ||
4174 | count++; | ||
4175 | ignore_once = 0; | ||
4176 | } | ||
4177 | } | ||
4178 | *dest = '\0'; | ||
4179 | |||
4180 | if (openpipe(pf) < 0) | ||
4181 | return 0; | ||
4182 | |||
4183 | niro | 816 | while ((i = vfork()) == -1 && errno == EAGAIN) |
4184 | continue; | ||
4185 | niro | 532 | |
4186 | DBGPRINTF3(("GRAVE: i is %p\n", io)); | ||
4187 | |||
4188 | if (i < 0) { | ||
4189 | closepipe(pf); | ||
4190 | err((char *) bb_msg_memory_exhausted); | ||
4191 | return 0; | ||
4192 | } | ||
4193 | if (i != 0) { | ||
4194 | niro | 816 | waitpid(i, NULL, 0); // safe_waitpid? |
4195 | global_env.iop->argp->aword = ++cp; | ||
4196 | niro | 532 | close(pf[1]); |
4197 | PUSHIO(afile, remap(pf[0]), | ||
4198 | niro | 816 | (int (*)(struct ioarg *)) ((quoted) ? qgravechar : gravechar)); |
4199 | niro | 532 | return 1; |
4200 | } | ||
4201 | /* allow trapped signals */ | ||
4202 | /* XXX - Maybe this signal stuff should go as well? */ | ||
4203 | for (j = 0; j <= _NSIG; j++) | ||
4204 | if (ourtrap[j] && signal(j, SIG_IGN) != SIG_IGN) | ||
4205 | signal(j, SIG_DFL); | ||
4206 | |||
4207 | niro | 816 | /* Testcase where below checks are needed: |
4208 | * close stdout & run this script: | ||
4209 | * files=`ls` | ||
4210 | * echo "$files" >zz | ||
4211 | */ | ||
4212 | xmove_fd(pf[1], 1); | ||
4213 | if (pf[0] != 1) | ||
4214 | close(pf[0]); | ||
4215 | niro | 532 | |
4216 | argument_list[0] = (char *) DEFAULT_SHELL; | ||
4217 | niro | 816 | argument_list[1] = (char *) "-c"; |
4218 | niro | 532 | argument_list[2] = child_cmd; |
4219 | niro | 816 | argument_list[3] = NULL; |
4220 | niro | 532 | |
4221 | cp = rexecve(argument_list[0], argument_list, makenv(1, wb)); | ||
4222 | prs(argument_list[0]); | ||
4223 | prs(": "); | ||
4224 | err(cp); | ||
4225 | niro | 816 | _exit(EXIT_FAILURE); |
4226 | niro | 532 | } |
4227 | |||
4228 | |||
4229 | static char *unquote(char *as) | ||
4230 | { | ||
4231 | char *s; | ||
4232 | |||
4233 | s = as; | ||
4234 | if (s != NULL) | ||
4235 | while (*s) | ||
4236 | *s++ &= ~QUOTE; | ||
4237 | return as; | ||
4238 | } | ||
4239 | |||
4240 | /* -------- glob.c -------- */ | ||
4241 | |||
4242 | /* | ||
4243 | * glob | ||
4244 | */ | ||
4245 | |||
4246 | #define scopy(x) strsave((x), areanum) | ||
4247 | #define BLKSIZ 512 | ||
4248 | #define NDENT ((BLKSIZ+sizeof(struct dirent)-1)/sizeof(struct dirent)) | ||
4249 | |||
4250 | static struct wdblock *cl, *nl; | ||
4251 | niro | 816 | static const char spcl[] ALIGN1= "[?*"; |
4252 | niro | 532 | |
4253 | static struct wdblock *glob(char *cp, struct wdblock *wb) | ||
4254 | { | ||
4255 | int i; | ||
4256 | char *pp; | ||
4257 | |||
4258 | if (cp == 0) | ||
4259 | return wb; | ||
4260 | i = 0; | ||
4261 | for (pp = cp; *pp; pp++) | ||
4262 | if (any(*pp, spcl)) | ||
4263 | i++; | ||
4264 | else if (!any(*pp & ~QUOTE, spcl)) | ||
4265 | *pp &= ~QUOTE; | ||
4266 | if (i != 0) { | ||
4267 | niro | 816 | for (cl = addword(scopy(cp), NULL); anyspcl(cl); cl = nl) { |
4268 | niro | 532 | nl = newword(cl->w_nword * 2); |
4269 | for (i = 0; i < cl->w_nword; i++) { /* for each argument */ | ||
4270 | for (pp = cl->w_words[i]; *pp; pp++) | ||
4271 | if (any(*pp, spcl)) { | ||
4272 | globname(cl->w_words[i], pp); | ||
4273 | break; | ||
4274 | } | ||
4275 | if (*pp == '\0') | ||
4276 | nl = addword(scopy(cl->w_words[i]), nl); | ||
4277 | } | ||
4278 | for (i = 0; i < cl->w_nword; i++) | ||
4279 | DELETE(cl->w_words[i]); | ||
4280 | DELETE(cl); | ||
4281 | } | ||
4282 | if (cl->w_nword) { | ||
4283 | for (i = 0; i < cl->w_nword; i++) | ||
4284 | niro | 816 | unquote(cl->w_words[i]); |
4285 | qsort_string_vector(cl->w_words, cl->w_nword); | ||
4286 | for (i = 0; i < cl->w_nword; i++) | ||
4287 | niro | 532 | wb = addword(cl->w_words[i], wb); |
4288 | DELETE(cl); | ||
4289 | return wb; | ||
4290 | } | ||
4291 | } | ||
4292 | wb = addword(unquote(cp), wb); | ||
4293 | return wb; | ||
4294 | } | ||
4295 | |||
4296 | static void globname(char *we, char *pp) | ||
4297 | { | ||
4298 | char *np, *cp; | ||
4299 | char *name, *gp, *dp; | ||
4300 | int k; | ||
4301 | DIR *dirp; | ||
4302 | struct dirent *de; | ||
4303 | char dname[NAME_MAX + 1]; | ||
4304 | struct stat dbuf; | ||
4305 | |||
4306 | for (np = we; np != pp; pp--) | ||
4307 | if (pp[-1] == '/') | ||
4308 | break; | ||
4309 | niro | 816 | dp = cp = get_space((int) (pp - np) + 3); |
4310 | while (np < pp) | ||
4311 | niro | 532 | *cp++ = *np++; |
4312 | *cp++ = '.'; | ||
4313 | *cp = '\0'; | ||
4314 | niro | 816 | gp = cp = get_space(strlen(pp) + 1); |
4315 | while (*np && *np != '/') | ||
4316 | niro | 532 | *cp++ = *np++; |
4317 | *cp = '\0'; | ||
4318 | dirp = opendir(dp); | ||
4319 | if (dirp == 0) { | ||
4320 | DELETE(dp); | ||
4321 | DELETE(gp); | ||
4322 | return; | ||
4323 | } | ||
4324 | dname[NAME_MAX] = '\0'; | ||
4325 | while ((de = readdir(dirp)) != NULL) { | ||
4326 | /* XXX Hmmm... What this could be? (abial) */ | ||
4327 | niro | 816 | /* if (ent[j].d_ino == 0) continue; |
4328 | niro | 532 | */ |
4329 | strncpy(dname, de->d_name, NAME_MAX); | ||
4330 | if (dname[0] == '.') | ||
4331 | if (*gp != '.') | ||
4332 | continue; | ||
4333 | for (k = 0; k < NAME_MAX; k++) | ||
4334 | if (any(dname[k], spcl)) | ||
4335 | dname[k] |= QUOTE; | ||
4336 | if (gmatch(dname, gp)) { | ||
4337 | name = generate(we, pp, dname, np); | ||
4338 | if (*np && !anys(np, spcl)) { | ||
4339 | if (stat(name, &dbuf)) { | ||
4340 | DELETE(name); | ||
4341 | continue; | ||
4342 | } | ||
4343 | } | ||
4344 | nl = addword(name, nl); | ||
4345 | } | ||
4346 | } | ||
4347 | closedir(dirp); | ||
4348 | DELETE(dp); | ||
4349 | DELETE(gp); | ||
4350 | } | ||
4351 | |||
4352 | /* | ||
4353 | * generate a pathname as below. | ||
4354 | * start..end1 / middle end | ||
4355 | * the slashes come for free | ||
4356 | */ | ||
4357 | static char *generate(char *start1, char *end1, char *middle, char *end) | ||
4358 | { | ||
4359 | char *p; | ||
4360 | char *op, *xp; | ||
4361 | |||
4362 | niro | 816 | p = op = get_space((int)(end1 - start1) + strlen(middle) + strlen(end) + 2); |
4363 | xp = start1; | ||
4364 | while (xp != end1) | ||
4365 | niro | 532 | *op++ = *xp++; |
4366 | niro | 816 | xp = middle; |
4367 | while (*xp != '\0') | ||
4368 | *op++ = *xp++; | ||
4369 | strcpy(op, end); | ||
4370 | niro | 532 | return p; |
4371 | } | ||
4372 | |||
4373 | static int anyspcl(struct wdblock *wb) | ||
4374 | { | ||
4375 | int i; | ||
4376 | char **wd; | ||
4377 | |||
4378 | wd = wb->w_words; | ||
4379 | for (i = 0; i < wb->w_nword; i++) | ||
4380 | if (anys(spcl, *wd++)) | ||
4381 | return 1; | ||
4382 | return 0; | ||
4383 | } | ||
4384 | |||
4385 | |||
4386 | /* -------- word.c -------- */ | ||
4387 | |||
4388 | static struct wdblock *newword(int nw) | ||
4389 | { | ||
4390 | struct wdblock *wb; | ||
4391 | |||
4392 | niro | 816 | wb = get_space(sizeof(*wb) + nw * sizeof(char *)); |
4393 | niro | 532 | wb->w_bsize = nw; |
4394 | wb->w_nword = 0; | ||
4395 | return wb; | ||
4396 | } | ||
4397 | |||
4398 | static struct wdblock *addword(char *wd, struct wdblock *wb) | ||
4399 | { | ||
4400 | struct wdblock *wb2; | ||
4401 | int nw; | ||
4402 | |||
4403 | if (wb == NULL) | ||
4404 | wb = newword(NSTART); | ||
4405 | nw = wb->w_nword; | ||
4406 | if (nw >= wb->w_bsize) { | ||
4407 | wb2 = newword(nw * 2); | ||
4408 | memcpy((char *) wb2->w_words, (char *) wb->w_words, | ||
4409 | nw * sizeof(char *)); | ||
4410 | wb2->w_nword = nw; | ||
4411 | DELETE(wb); | ||
4412 | wb = wb2; | ||
4413 | } | ||
4414 | wb->w_words[wb->w_nword++] = wd; | ||
4415 | return wb; | ||
4416 | } | ||
4417 | |||
4418 | niro | 816 | static char **getwords(struct wdblock *wb) |
4419 | niro | 532 | { |
4420 | char **wd; | ||
4421 | int nb; | ||
4422 | |||
4423 | if (wb == NULL) | ||
4424 | return NULL; | ||
4425 | if (wb->w_nword == 0) { | ||
4426 | DELETE(wb); | ||
4427 | return NULL; | ||
4428 | } | ||
4429 | niro | 816 | nb = sizeof(*wd) * wb->w_nword; |
4430 | wd = get_space(nb); | ||
4431 | memcpy(wd, wb->w_words, nb); | ||
4432 | DELETE(wb); /* perhaps should done by caller */ | ||
4433 | niro | 532 | return wd; |
4434 | } | ||
4435 | |||
4436 | |||
4437 | /* -------- io.c -------- */ | ||
4438 | |||
4439 | /* | ||
4440 | * shell IO | ||
4441 | */ | ||
4442 | |||
4443 | static int my_getc(int ec) | ||
4444 | { | ||
4445 | int c; | ||
4446 | |||
4447 | niro | 816 | if (global_env.linep > elinep) { |
4448 | while ((c = readc()) != '\n' && c) | ||
4449 | continue; | ||
4450 | niro | 532 | err("input line too long"); |
4451 | niro | 816 | gflg = 1; |
4452 | niro | 532 | return c; |
4453 | } | ||
4454 | c = readc(); | ||
4455 | niro | 816 | if ((ec != '\'') && (ec != '`') && (global_env.iop->task != XGRAVE)) { |
4456 | niro | 532 | if (c == '\\') { |
4457 | c = readc(); | ||
4458 | if (c == '\n' && ec != '\"') | ||
4459 | return my_getc(ec); | ||
4460 | c |= QUOTE; | ||
4461 | } | ||
4462 | } | ||
4463 | return c; | ||
4464 | } | ||
4465 | |||
4466 | static void unget(int c) | ||
4467 | { | ||
4468 | niro | 816 | if (global_env.iop >= global_env.iobase) |
4469 | global_env.iop->peekc = c; | ||
4470 | niro | 532 | } |
4471 | |||
4472 | static int eofc(void) | ||
4473 | { | ||
4474 | niro | 816 | return global_env.iop < global_env.iobase || (global_env.iop->peekc == 0 && global_env.iop->prev == 0); |
4475 | niro | 532 | } |
4476 | |||
4477 | static int readc(void) | ||
4478 | { | ||
4479 | int c; | ||
4480 | |||
4481 | niro | 816 | RCPRINTF(("READC: global_env.iop %p, global_env.iobase %p\n", global_env.iop, global_env.iobase)); |
4482 | niro | 532 | |
4483 | niro | 816 | for (; global_env.iop >= global_env.iobase; global_env.iop--) { |
4484 | RCPRINTF(("READC: global_env.iop %p, peekc 0x%x\n", global_env.iop, global_env.iop->peekc)); | ||
4485 | c = global_env.iop->peekc; | ||
4486 | niro | 532 | if (c != '\0') { |
4487 | niro | 816 | global_env.iop->peekc = 0; |
4488 | niro | 532 | return c; |
4489 | niro | 816 | } |
4490 | if (global_env.iop->prev != 0) { | ||
4491 | c = (*global_env.iop->iofn)(global_env.iop->argp, global_env.iop); | ||
4492 | if (c != '\0') { | ||
4493 | if (c == -1) { | ||
4494 | global_env.iop++; | ||
4495 | continue; | ||
4496 | niro | 532 | } |
4497 | niro | 816 | if (global_env.iop == iostack) |
4498 | ioecho(c); | ||
4499 | global_env.iop->prev = c; | ||
4500 | return c; | ||
4501 | niro | 532 | } |
4502 | niro | 816 | if (global_env.iop->task == XIO && global_env.iop->prev != '\n') { |
4503 | global_env.iop->prev = 0; | ||
4504 | if (global_env.iop == iostack) | ||
4505 | ioecho('\n'); | ||
4506 | return '\n'; | ||
4507 | } | ||
4508 | } | ||
4509 | if (global_env.iop->task == XIO) { | ||
4510 | if (multiline) { | ||
4511 | global_env.iop->prev = 0; | ||
4512 | return 0; | ||
4513 | } | ||
4514 | if (interactive && global_env.iop == iostack + 1) { | ||
4515 | #if ENABLE_FEATURE_EDITING | ||
4516 | current_prompt = prompt->value; | ||
4517 | niro | 532 | #else |
4518 | niro | 816 | prs(prompt->value); |
4519 | niro | 532 | #endif |
4520 | } | ||
4521 | } | ||
4522 | } /* FOR */ | ||
4523 | |||
4524 | niro | 816 | if (global_env.iop >= iostack) { |
4525 | RCPRINTF(("READC: return 0, global_env.iop %p\n", global_env.iop)); | ||
4526 | niro | 532 | return 0; |
4527 | } | ||
4528 | |||
4529 | DBGPRINTF(("READC: leave()...\n")); | ||
4530 | leave(); | ||
4531 | /* NOTREACHED */ | ||
4532 | return 0; | ||
4533 | } | ||
4534 | |||
4535 | static void ioecho(char c) | ||
4536 | { | ||
4537 | niro | 816 | if (FLAG['v']) |
4538 | write(STDERR_FILENO, &c, sizeof c); | ||
4539 | niro | 532 | } |
4540 | |||
4541 | static void pushio(struct ioarg *argp, int (*fn) (struct ioarg *)) | ||
4542 | { | ||
4543 | niro | 816 | DBGPRINTF(("PUSHIO: argp %p, argp->afid 0x%x, global_env.iop %p\n", argp, |
4544 | argp->afid, global_env.iop)); | ||
4545 | niro | 532 | |
4546 | /* Set env ptr for io source to next array spot and check for array overflow */ | ||
4547 | niro | 816 | if (++global_env.iop >= &iostack[NPUSH]) { |
4548 | global_env.iop--; | ||
4549 | niro | 532 | err("Shell input nested too deeply"); |
4550 | niro | 816 | gflg = 1; |
4551 | niro | 532 | return; |
4552 | } | ||
4553 | |||
4554 | /* We did not overflow the NPUSH array spots so setup data structs */ | ||
4555 | |||
4556 | niro | 816 | global_env.iop->iofn = (int (*)(struct ioarg *, struct io *)) fn; /* Store data source func ptr */ |
4557 | niro | 532 | |
4558 | if (argp->afid != AFID_NOBUF) | ||
4559 | niro | 816 | global_env.iop->argp = argp; |
4560 | niro | 532 | else { |
4561 | |||
4562 | niro | 816 | global_env.iop->argp = ioargstack + (global_env.iop - iostack); /* MAL - index into stack */ |
4563 | *global_env.iop->argp = *argp; /* copy data from temp area into stack spot */ | ||
4564 | niro | 532 | |
4565 | /* MAL - mainbuf is for 1st data source (command line?) and all nested use a single shared buffer? */ | ||
4566 | |||
4567 | niro | 816 | if (global_env.iop == &iostack[0]) |
4568 | global_env.iop->argp->afbuf = &mainbuf; | ||
4569 | niro | 532 | else |
4570 | niro | 816 | global_env.iop->argp->afbuf = &sharedbuf; |
4571 | niro | 532 | |
4572 | /* MAL - if not a termimal AND (commandline OR readable file) then give it a buffer id? */ | ||
4573 | /* This line appears to be active when running scripts from command line */ | ||
4574 | niro | 816 | if ((isatty(global_env.iop->argp->afile) == 0) |
4575 | && (global_env.iop == &iostack[0] | ||
4576 | || lseek(global_env.iop->argp->afile, 0L, SEEK_CUR) != -1)) { | ||
4577 | niro | 532 | if (++bufid == AFID_NOBUF) /* counter rollover check, AFID_NOBUF = 11111111 */ |
4578 | bufid = AFID_ID; /* AFID_ID = 0 */ | ||
4579 | |||
4580 | niro | 816 | global_env.iop->argp->afid = bufid; /* assign buffer id */ |
4581 | niro | 532 | } |
4582 | |||
4583 | niro | 816 | DBGPRINTF(("PUSHIO: iostack %p, global_env.iop %p, afbuf %p\n", |
4584 | iostack, global_env.iop, global_env.iop->argp->afbuf)); | ||
4585 | DBGPRINTF(("PUSHIO: mbuf %p, sbuf %p, bid %d, global_env.iop %p\n", | ||
4586 | &mainbuf, &sharedbuf, bufid, global_env.iop)); | ||
4587 | niro | 532 | |
4588 | } | ||
4589 | |||
4590 | niro | 816 | global_env.iop->prev = ~'\n'; |
4591 | global_env.iop->peekc = 0; | ||
4592 | global_env.iop->xchar = 0; | ||
4593 | global_env.iop->nlcount = 0; | ||
4594 | niro | 532 | |
4595 | if (fn == filechar || fn == linechar) | ||
4596 | niro | 816 | global_env.iop->task = XIO; |
4597 | niro | 532 | else if (fn == (int (*)(struct ioarg *)) gravechar |
4598 | niro | 816 | || fn == (int (*)(struct ioarg *)) qgravechar) |
4599 | global_env.iop->task = XGRAVE; | ||
4600 | niro | 532 | else |
4601 | niro | 816 | global_env.iop->task = XOTHER; |
4602 | niro | 532 | } |
4603 | |||
4604 | static struct io *setbase(struct io *ip) | ||
4605 | { | ||
4606 | struct io *xp; | ||
4607 | |||
4608 | niro | 816 | xp = global_env.iobase; |
4609 | global_env.iobase = ip; | ||
4610 | niro | 532 | return xp; |
4611 | } | ||
4612 | |||
4613 | /* | ||
4614 | * Input generating functions | ||
4615 | */ | ||
4616 | |||
4617 | /* | ||
4618 | niro | 816 | * Produce the characters of a string, then a newline, then NUL. |
4619 | niro | 532 | */ |
4620 | static int nlchar(struct ioarg *ap) | ||
4621 | { | ||
4622 | niro | 816 | char c; |
4623 | niro | 532 | |
4624 | if (ap->aword == NULL) | ||
4625 | niro | 816 | return '\0'; |
4626 | c = *ap->aword++; | ||
4627 | if (c == '\0') { | ||
4628 | niro | 532 | ap->aword = NULL; |
4629 | return '\n'; | ||
4630 | } | ||
4631 | return c; | ||
4632 | } | ||
4633 | |||
4634 | /* | ||
4635 | * Given a list of words, produce the characters | ||
4636 | * in them, with a space after each word. | ||
4637 | */ | ||
4638 | static int wdchar(struct ioarg *ap) | ||
4639 | { | ||
4640 | char c; | ||
4641 | char **wl; | ||
4642 | |||
4643 | wl = ap->awordlist; | ||
4644 | if (wl == NULL) | ||
4645 | return 0; | ||
4646 | if (*wl != NULL) { | ||
4647 | c = *(*wl)++; | ||
4648 | if (c != 0) | ||
4649 | return c & 0177; | ||
4650 | ap->awordlist++; | ||
4651 | return ' '; | ||
4652 | } | ||
4653 | ap->awordlist = NULL; | ||
4654 | return '\n'; | ||
4655 | } | ||
4656 | |||
4657 | /* | ||
4658 | * Return the characters of a list of words, | ||
4659 | * producing a space between them. | ||
4660 | */ | ||
4661 | static int dolchar(struct ioarg *ap) | ||
4662 | { | ||
4663 | char *wp; | ||
4664 | |||
4665 | wp = *ap->awordlist++; | ||
4666 | if (wp != NULL) { | ||
4667 | PUSHIO(aword, wp, *ap->awordlist == NULL ? strchar : xxchar); | ||
4668 | return -1; | ||
4669 | } | ||
4670 | return 0; | ||
4671 | } | ||
4672 | |||
4673 | static int xxchar(struct ioarg *ap) | ||
4674 | { | ||
4675 | int c; | ||
4676 | |||
4677 | if (ap->aword == NULL) | ||
4678 | return 0; | ||
4679 | c = *ap->aword++; | ||
4680 | if (c == '\0') { | ||
4681 | ap->aword = NULL; | ||
4682 | return ' '; | ||
4683 | } | ||
4684 | return c; | ||
4685 | } | ||
4686 | |||
4687 | /* | ||
4688 | * Produce the characters from a single word (string). | ||
4689 | */ | ||
4690 | static int strchar(struct ioarg *ap) | ||
4691 | { | ||
4692 | if (ap->aword == NULL) | ||
4693 | return 0; | ||
4694 | return *ap->aword++; | ||
4695 | } | ||
4696 | |||
4697 | /* | ||
4698 | * Produce quoted characters from a single word (string). | ||
4699 | */ | ||
4700 | static int qstrchar(struct ioarg *ap) | ||
4701 | { | ||
4702 | int c; | ||
4703 | |||
4704 | if (ap->aword == NULL) | ||
4705 | return 0; | ||
4706 | c = *ap->aword++; | ||
4707 | if (c) | ||
4708 | c |= QUOTE; | ||
4709 | return c; | ||
4710 | } | ||
4711 | |||
4712 | /* | ||
4713 | * Return the characters from a file. | ||
4714 | */ | ||
4715 | static int filechar(struct ioarg *ap) | ||
4716 | { | ||
4717 | int i; | ||
4718 | char c; | ||
4719 | struct iobuf *bp = ap->afbuf; | ||
4720 | |||
4721 | if (ap->afid != AFID_NOBUF) { | ||
4722 | i = (ap->afid != bp->id); | ||
4723 | if (i || bp->bufp == bp->ebufp) { | ||
4724 | if (i) | ||
4725 | lseek(ap->afile, ap->afpos, SEEK_SET); | ||
4726 | |||
4727 | niro | 816 | i = nonblock_safe_read(ap->afile, bp->buf, sizeof(bp->buf)); |
4728 | niro | 532 | if (i <= 0) { |
4729 | closef(ap->afile); | ||
4730 | return 0; | ||
4731 | } | ||
4732 | |||
4733 | bp->id = ap->afid; | ||
4734 | bp->bufp = bp->buf; | ||
4735 | bp->ebufp = bp->bufp + i; | ||
4736 | } | ||
4737 | |||
4738 | ap->afpos++; | ||
4739 | return *bp->bufp++ & 0177; | ||
4740 | } | ||
4741 | niro | 816 | #if ENABLE_FEATURE_EDITING |
4742 | niro | 532 | if (interactive && isatty(ap->afile)) { |
4743 | niro | 816 | /* moved to G: static char filechar_cmdbuf[BUFSIZ]; */ |
4744 | niro | 532 | static int position = 0, size = 0; |
4745 | |||
4746 | while (size == 0 || position >= size) { | ||
4747 | niro | 816 | size = read_line_input(current_prompt, filechar_cmdbuf, BUFSIZ, line_input_state); |
4748 | if (size < 0) /* Error/EOF */ | ||
4749 | exit(EXIT_SUCCESS); | ||
4750 | niro | 532 | position = 0; |
4751 | niro | 816 | /* if Ctrl-C, size == 0 and loop will repeat */ |
4752 | niro | 532 | } |
4753 | niro | 816 | c = filechar_cmdbuf[position]; |
4754 | niro | 532 | position++; |
4755 | return c; | ||
4756 | niro | 816 | } |
4757 | niro | 532 | #endif |
4758 | niro | 816 | i = nonblock_safe_read(ap->afile, &c, sizeof(c)); |
4759 | return i == sizeof(c) ? (c & 0x7f) : (closef(ap->afile), 0); | ||
4760 | niro | 532 | } |
4761 | |||
4762 | /* | ||
4763 | * Return the characters from a here temp file. | ||
4764 | */ | ||
4765 | static int herechar(struct ioarg *ap) | ||
4766 | { | ||
4767 | char c; | ||
4768 | |||
4769 | niro | 816 | if (nonblock_safe_read(ap->afile, &c, sizeof(c)) != sizeof(c)) { |
4770 | niro | 532 | close(ap->afile); |
4771 | niro | 816 | c = '\0'; |
4772 | niro | 532 | } |
4773 | return c; | ||
4774 | } | ||
4775 | |||
4776 | /* | ||
4777 | * Return the characters produced by a process (`...`). | ||
4778 | * Quote them if required, and remove any trailing newline characters. | ||
4779 | */ | ||
4780 | static int gravechar(struct ioarg *ap, struct io *iop) | ||
4781 | { | ||
4782 | int c; | ||
4783 | |||
4784 | c = qgravechar(ap, iop) & ~QUOTE; | ||
4785 | if (c == '\n') | ||
4786 | c = ' '; | ||
4787 | return c; | ||
4788 | } | ||
4789 | |||
4790 | static int qgravechar(struct ioarg *ap, struct io *iop) | ||
4791 | { | ||
4792 | int c; | ||
4793 | |||
4794 | DBGPRINTF3(("QGRAVECHAR: enter, ap=%p, iop=%p\n", ap, iop)); | ||
4795 | |||
4796 | if (iop->xchar) { | ||
4797 | if (iop->nlcount) { | ||
4798 | iop->nlcount--; | ||
4799 | return '\n' | QUOTE; | ||
4800 | } | ||
4801 | c = iop->xchar; | ||
4802 | iop->xchar = 0; | ||
4803 | } else if ((c = filechar(ap)) == '\n') { | ||
4804 | iop->nlcount = 1; | ||
4805 | while ((c = filechar(ap)) == '\n') | ||
4806 | iop->nlcount++; | ||
4807 | iop->xchar = c; | ||
4808 | if (c == 0) | ||
4809 | return c; | ||
4810 | iop->nlcount--; | ||
4811 | c = '\n'; | ||
4812 | } | ||
4813 | return c != 0 ? c | QUOTE : 0; | ||
4814 | } | ||
4815 | |||
4816 | /* | ||
4817 | * Return a single command (usually the first line) from a file. | ||
4818 | */ | ||
4819 | static int linechar(struct ioarg *ap) | ||
4820 | { | ||
4821 | int c; | ||
4822 | |||
4823 | c = filechar(ap); | ||
4824 | if (c == '\n') { | ||
4825 | if (!multiline) { | ||
4826 | closef(ap->afile); | ||
4827 | ap->afile = -1; /* illegal value */ | ||
4828 | } | ||
4829 | } | ||
4830 | return c; | ||
4831 | } | ||
4832 | |||
4833 | /* | ||
4834 | niro | 816 | * Remap fd into shell's fd space |
4835 | niro | 532 | */ |
4836 | static int remap(int fd) | ||
4837 | { | ||
4838 | int i; | ||
4839 | int map[NOFILE]; | ||
4840 | int newfd; | ||
4841 | |||
4842 | niro | 816 | DBGPRINTF(("REMAP: fd=%d, global_env.iofd=%d\n", fd, global_env.iofd)); |
4843 | niro | 532 | |
4844 | niro | 816 | if (fd < global_env.iofd) { |
4845 | niro | 532 | for (i = 0; i < NOFILE; i++) |
4846 | map[i] = 0; | ||
4847 | |||
4848 | do { | ||
4849 | map[fd] = 1; | ||
4850 | newfd = dup(fd); | ||
4851 | fd = newfd; | ||
4852 | niro | 816 | } while (fd >= 0 && fd < global_env.iofd); |
4853 | niro | 532 | |
4854 | for (i = 0; i < NOFILE; i++) | ||
4855 | if (map[i]) | ||
4856 | close(i); | ||
4857 | |||
4858 | if (fd < 0) | ||
4859 | err("too many files open in shell"); | ||
4860 | } | ||
4861 | |||
4862 | return fd; | ||
4863 | } | ||
4864 | |||
4865 | static int openpipe(int *pv) | ||
4866 | { | ||
4867 | int i; | ||
4868 | |||
4869 | i = pipe(pv); | ||
4870 | if (i < 0) | ||
4871 | err("can't create pipe - try again"); | ||
4872 | return i; | ||
4873 | } | ||
4874 | |||
4875 | static void closepipe(int *pv) | ||
4876 | { | ||
4877 | if (pv != NULL) { | ||
4878 | niro | 816 | close(pv[0]); |
4879 | close(pv[1]); | ||
4880 | niro | 532 | } |
4881 | } | ||
4882 | |||
4883 | niro | 816 | |
4884 | niro | 532 | /* -------- here.c -------- */ |
4885 | |||
4886 | /* | ||
4887 | * here documents | ||
4888 | */ | ||
4889 | |||
4890 | static void markhere(char *s, struct ioword *iop) | ||
4891 | { | ||
4892 | struct here *h, *lh; | ||
4893 | |||
4894 | DBGPRINTF7(("MARKHERE: enter, s=%p\n", s)); | ||
4895 | |||
4896 | niro | 816 | h = get_space(sizeof(struct here)); |
4897 | if (h == NULL) | ||
4898 | niro | 532 | return; |
4899 | |||
4900 | h->h_tag = evalstr(s, DOSUB); | ||
4901 | if (h->h_tag == 0) | ||
4902 | return; | ||
4903 | |||
4904 | h->h_iop = iop; | ||
4905 | iop->io_name = 0; | ||
4906 | h->h_next = NULL; | ||
4907 | if (inhere == 0) | ||
4908 | inhere = h; | ||
4909 | niro | 816 | else { |
4910 | for (lh = inhere; lh != NULL; lh = lh->h_next) { | ||
4911 | niro | 532 | if (lh->h_next == 0) { |
4912 | lh->h_next = h; | ||
4913 | break; | ||
4914 | } | ||
4915 | niro | 816 | } |
4916 | } | ||
4917 | niro | 532 | iop->io_flag |= IOHERE | IOXHERE; |
4918 | niro | 816 | for (s = h->h_tag; *s; s++) { |
4919 | niro | 532 | if (*s & QUOTE) { |
4920 | iop->io_flag &= ~IOXHERE; | ||
4921 | *s &= ~QUOTE; | ||
4922 | } | ||
4923 | niro | 816 | } |
4924 | h->h_dosub = ((iop->io_flag & IOXHERE) ? '\0' : '\''); | ||
4925 | niro | 532 | } |
4926 | |||
4927 | static void gethere(void) | ||
4928 | { | ||
4929 | struct here *h, *hp; | ||
4930 | |||
4931 | DBGPRINTF7(("GETHERE: enter...\n")); | ||
4932 | |||
4933 | /* Scan here files first leaving inhere list in place */ | ||
4934 | for (hp = h = inhere; h != NULL; hp = h, h = h->h_next) | ||
4935 | niro | 816 | readhere(&h->h_iop->io_name, h->h_tag, h->h_dosub /* NUL or ' */); |
4936 | niro | 532 | |
4937 | /* Make inhere list active - keep list intact for scraphere */ | ||
4938 | if (hp != NULL) { | ||
4939 | hp->h_next = acthere; | ||
4940 | acthere = inhere; | ||
4941 | inhere = NULL; | ||
4942 | } | ||
4943 | } | ||
4944 | |||
4945 | static void readhere(char **name, char *s, int ec) | ||
4946 | { | ||
4947 | int tf; | ||
4948 | char tname[30] = ".msh_XXXXXX"; | ||
4949 | int c; | ||
4950 | jmp_buf ev; | ||
4951 | char myline[LINELIM + 1]; | ||
4952 | char *thenext; | ||
4953 | |||
4954 | DBGPRINTF7(("READHERE: enter, name=%p, s=%p\n", name, s)); | ||
4955 | |||
4956 | tf = mkstemp(tname); | ||
4957 | if (tf < 0) | ||
4958 | return; | ||
4959 | |||
4960 | *name = strsave(tname, areanum); | ||
4961 | errpt = ev; | ||
4962 | if (newenv(setjmp(errpt)) != 0) | ||
4963 | unlink(tname); | ||
4964 | else { | ||
4965 | niro | 816 | pushio(global_env.iop->argp, (int (*)(struct ioarg *)) global_env.iop->iofn); |
4966 | global_env.iobase = global_env.iop; | ||
4967 | niro | 532 | for (;;) { |
4968 | niro | 816 | if (interactive && global_env.iop <= iostack) { |
4969 | #if ENABLE_FEATURE_EDITING | ||
4970 | niro | 532 | current_prompt = cprompt->value; |
4971 | #else | ||
4972 | prs(cprompt->value); | ||
4973 | #endif | ||
4974 | } | ||
4975 | thenext = myline; | ||
4976 | while ((c = my_getc(ec)) != '\n' && c) { | ||
4977 | if (ec == '\'') | ||
4978 | c &= ~QUOTE; | ||
4979 | if (thenext >= &myline[LINELIM]) { | ||
4980 | c = 0; | ||
4981 | break; | ||
4982 | } | ||
4983 | *thenext++ = c; | ||
4984 | } | ||
4985 | *thenext = 0; | ||
4986 | if (strcmp(s, myline) == 0 || c == 0) | ||
4987 | break; | ||
4988 | *thenext++ = '\n'; | ||
4989 | write(tf, myline, (int) (thenext - myline)); | ||
4990 | } | ||
4991 | if (c == 0) { | ||
4992 | prs("here document `"); | ||
4993 | prs(s); | ||
4994 | err("' unclosed"); | ||
4995 | } | ||
4996 | quitenv(); | ||
4997 | } | ||
4998 | close(tf); | ||
4999 | } | ||
5000 | |||
5001 | /* | ||
5002 | * open here temp file. | ||
5003 | * if unquoted here, expand here temp file into second temp file. | ||
5004 | */ | ||
5005 | static int herein(char *hname, int xdoll) | ||
5006 | { | ||
5007 | int hf; | ||
5008 | int tf; | ||
5009 | |||
5010 | #if __GNUC__ | ||
5011 | /* Avoid longjmp clobbering */ | ||
5012 | (void) &tf; | ||
5013 | #endif | ||
5014 | if (hname == NULL) | ||
5015 | return -1; | ||
5016 | |||
5017 | DBGPRINTF7(("HEREIN: hname is %s, xdoll=%d\n", hname, xdoll)); | ||
5018 | |||
5019 | niro | 816 | hf = open(hname, O_RDONLY); |
5020 | niro | 532 | if (hf < 0) |
5021 | return -1; | ||
5022 | |||
5023 | if (xdoll) { | ||
5024 | char c; | ||
5025 | char tname[30] = ".msh_XXXXXX"; | ||
5026 | jmp_buf ev; | ||
5027 | |||
5028 | tf = mkstemp(tname); | ||
5029 | if (tf < 0) | ||
5030 | return -1; | ||
5031 | niro | 816 | errpt = ev; |
5032 | if (newenv(setjmp(errpt)) == 0) { | ||
5033 | niro | 532 | PUSHIO(afile, hf, herechar); |
5034 | niro | 816 | setbase(global_env.iop); |
5035 | niro | 532 | while ((c = subgetc(0, 0)) != 0) { |
5036 | c &= ~QUOTE; | ||
5037 | write(tf, &c, sizeof c); | ||
5038 | } | ||
5039 | quitenv(); | ||
5040 | } else | ||
5041 | unlink(tname); | ||
5042 | close(tf); | ||
5043 | niro | 816 | tf = open(tname, O_RDONLY); |
5044 | niro | 532 | unlink(tname); |
5045 | return tf; | ||
5046 | niro | 816 | } |
5047 | return hf; | ||
5048 | niro | 532 | } |
5049 | |||
5050 | static void scraphere(void) | ||
5051 | { | ||
5052 | struct here *h; | ||
5053 | |||
5054 | DBGPRINTF7(("SCRAPHERE: enter...\n")); | ||
5055 | |||
5056 | for (h = inhere; h != NULL; h = h->h_next) { | ||
5057 | if (h->h_iop && h->h_iop->io_name) | ||
5058 | unlink(h->h_iop->io_name); | ||
5059 | } | ||
5060 | inhere = NULL; | ||
5061 | } | ||
5062 | |||
5063 | /* unlink here temp files before a freearea(area) */ | ||
5064 | static void freehere(int area) | ||
5065 | { | ||
5066 | struct here *h, *hl; | ||
5067 | |||
5068 | DBGPRINTF6(("FREEHERE: enter, area=%d\n", area)); | ||
5069 | |||
5070 | hl = NULL; | ||
5071 | niro | 816 | for (h = acthere; h != NULL; h = h->h_next) { |
5072 | niro | 532 | if (getarea((char *) h) >= area) { |
5073 | if (h->h_iop->io_name != NULL) | ||
5074 | unlink(h->h_iop->io_name); | ||
5075 | if (hl == NULL) | ||
5076 | acthere = h->h_next; | ||
5077 | else | ||
5078 | hl->h_next = h->h_next; | ||
5079 | niro | 816 | } else { |
5080 | niro | 532 | hl = h; |
5081 | niro | 816 | } |
5082 | } | ||
5083 | niro | 532 | } |
5084 | |||
5085 | |||
5086 | niro | 816 | /* -------- sh.c -------- */ |
5087 | /* | ||
5088 | * shell | ||
5089 | */ | ||
5090 | niro | 532 | |
5091 | niro | 816 | int msh_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
5092 | int msh_main(int argc, char **argv) | ||
5093 | { | ||
5094 | int f; | ||
5095 | char *s; | ||
5096 | int cflag; | ||
5097 | char *name, **ap; | ||
5098 | int (*iof) (struct ioarg *); | ||
5099 | |||
5100 | INIT_G(); | ||
5101 | |||
5102 | sharedbuf.id = AFID_NOBUF; | ||
5103 | mainbuf.id = AFID_NOBUF; | ||
5104 | elinep = line + sizeof(line) - 5; | ||
5105 | |||
5106 | #if ENABLE_FEATURE_EDITING | ||
5107 | line_input_state = new_line_input_t(FOR_SHELL); | ||
5108 | #endif | ||
5109 | |||
5110 | DBGPRINTF(("MSH_MAIN: argc %d, environ %p\n", argc, environ)); | ||
5111 | |||
5112 | initarea(); | ||
5113 | ap = environ; | ||
5114 | if (ap != NULL) { | ||
5115 | while (*ap) | ||
5116 | assign(*ap++, !COPYV); | ||
5117 | for (ap = environ; *ap;) | ||
5118 | export(lookup(*ap++)); | ||
5119 | } | ||
5120 | closeall(); | ||
5121 | areanum = 1; | ||
5122 | |||
5123 | shell = lookup("SHELL"); | ||
5124 | if (shell->value == null) | ||
5125 | setval(shell, (char *)DEFAULT_SHELL); | ||
5126 | export(shell); | ||
5127 | |||
5128 | homedir = lookup("HOME"); | ||
5129 | if (homedir->value == null) | ||
5130 | setval(homedir, "/"); | ||
5131 | export(homedir); | ||
5132 | |||
5133 | setval(lookup("$"), putn(getpid())); | ||
5134 | |||
5135 | path = lookup("PATH"); | ||
5136 | if (path->value == null) { | ||
5137 | /* Can be merged with same string elsewhere in bbox */ | ||
5138 | if (geteuid() == 0) | ||
5139 | setval(path, bb_default_root_path); | ||
5140 | else | ||
5141 | setval(path, bb_default_path); | ||
5142 | } | ||
5143 | export(path); | ||
5144 | |||
5145 | ifs = lookup("IFS"); | ||
5146 | if (ifs->value == null) | ||
5147 | setval(ifs, " \t\n"); | ||
5148 | |||
5149 | #ifdef MSHDEBUG | ||
5150 | mshdbg_var = lookup("MSHDEBUG"); | ||
5151 | if (mshdbg_var->value == null) | ||
5152 | setval(mshdbg_var, "0"); | ||
5153 | #endif | ||
5154 | |||
5155 | prompt = lookup("PS1"); | ||
5156 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT | ||
5157 | if (prompt->value == null) | ||
5158 | #endif | ||
5159 | setval(prompt, DEFAULT_USER_PROMPT); | ||
5160 | if (geteuid() == 0) { | ||
5161 | setval(prompt, DEFAULT_ROOT_PROMPT); | ||
5162 | prompt->status &= ~EXPORT; | ||
5163 | } | ||
5164 | cprompt = lookup("PS2"); | ||
5165 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT | ||
5166 | if (cprompt->value == null) | ||
5167 | #endif | ||
5168 | setval(cprompt, "> "); | ||
5169 | |||
5170 | iof = filechar; | ||
5171 | cflag = 0; | ||
5172 | name = *argv++; | ||
5173 | if (--argc >= 1) { | ||
5174 | if (argv[0][0] == '-' && argv[0][1] != '\0') { | ||
5175 | for (s = argv[0] + 1; *s; s++) | ||
5176 | switch (*s) { | ||
5177 | case 'c': | ||
5178 | prompt->status &= ~EXPORT; | ||
5179 | cprompt->status &= ~EXPORT; | ||
5180 | setval(prompt, ""); | ||
5181 | setval(cprompt, ""); | ||
5182 | cflag = 1; | ||
5183 | if (--argc > 0) | ||
5184 | PUSHIO(aword, *++argv, iof = nlchar); | ||
5185 | break; | ||
5186 | |||
5187 | case 'q': | ||
5188 | qflag = SIG_DFL; | ||
5189 | break; | ||
5190 | |||
5191 | case 's': | ||
5192 | /* standard input */ | ||
5193 | break; | ||
5194 | |||
5195 | case 't': | ||
5196 | prompt->status &= ~EXPORT; | ||
5197 | setval(prompt, ""); | ||
5198 | iof = linechar; | ||
5199 | break; | ||
5200 | |||
5201 | case 'i': | ||
5202 | interactive = 1; | ||
5203 | default: | ||
5204 | if (*s >= 'a' && *s <= 'z') | ||
5205 | FLAG[(int) *s]++; | ||
5206 | } | ||
5207 | } else { | ||
5208 | argv--; | ||
5209 | argc++; | ||
5210 | } | ||
5211 | |||
5212 | if (iof == filechar && --argc > 0) { | ||
5213 | setval(prompt, ""); | ||
5214 | setval(cprompt, ""); | ||
5215 | prompt->status &= ~EXPORT; | ||
5216 | cprompt->status &= ~EXPORT; | ||
5217 | |||
5218 | /* Shell is non-interactive, activate printf-based debug */ | ||
5219 | #ifdef MSHDEBUG | ||
5220 | mshdbg = mshdbg_var->value[0] - '0'; | ||
5221 | if (mshdbg < 0) | ||
5222 | mshdbg = 0; | ||
5223 | #endif | ||
5224 | DBGPRINTF(("MSH_MAIN: calling newfile()\n")); | ||
5225 | |||
5226 | name = *++argv; | ||
5227 | if (newfile(name)) | ||
5228 | exit(EXIT_FAILURE); /* Exit on error */ | ||
5229 | } | ||
5230 | } | ||
5231 | |||
5232 | setdash(); | ||
5233 | |||
5234 | /* This won't be true if PUSHIO has been called, say from newfile() above */ | ||
5235 | if (global_env.iop < iostack) { | ||
5236 | PUSHIO(afile, 0, iof); | ||
5237 | if (isatty(0) && isatty(1) && !cflag) { | ||
5238 | interactive = 1; | ||
5239 | #if !ENABLE_FEATURE_SH_EXTRA_QUIET | ||
5240 | #ifdef MSHDEBUG | ||
5241 | printf("\n\n%s built-in shell (msh with debug)\n", bb_banner); | ||
5242 | #else | ||
5243 | printf("\n\n%s built-in shell (msh)\n", bb_banner); | ||
5244 | #endif | ||
5245 | printf("Enter 'help' for a list of built-in commands.\n\n"); | ||
5246 | #endif | ||
5247 | } | ||
5248 | } | ||
5249 | |||
5250 | signal(SIGQUIT, qflag); | ||
5251 | if (name && name[0] == '-') { | ||
5252 | interactive = 1; | ||
5253 | f = open(".profile", O_RDONLY); | ||
5254 | if (f >= 0) | ||
5255 | next(remap(f)); | ||
5256 | f = open("/etc/profile", O_RDONLY); | ||
5257 | if (f >= 0) | ||
5258 | next(remap(f)); | ||
5259 | } | ||
5260 | if (interactive) | ||
5261 | signal(SIGTERM, sig); | ||
5262 | |||
5263 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) | ||
5264 | signal(SIGINT, onintr); | ||
5265 | |||
5266 | /* Handle "msh SCRIPT VAR=val params..." */ | ||
5267 | /* Disabled: bash does not do it! */ | ||
5268 | #if 0 | ||
5269 | argv++; | ||
5270 | /* skip leading args of the form VAR=val */ | ||
5271 | while (*argv && assign(*argv, !COPYV)) { | ||
5272 | argc--; | ||
5273 | argv++; | ||
5274 | } | ||
5275 | argv--; | ||
5276 | #endif | ||
5277 | dolv = argv; | ||
5278 | dolc = argc; | ||
5279 | dolv[0] = name; | ||
5280 | |||
5281 | setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc)); | ||
5282 | |||
5283 | DBGPRINTF(("MSH_MAIN: begin FOR loop, interactive %d, global_env.iop %p, iostack %p\n", interactive, global_env.iop, iostack)); | ||
5284 | |||
5285 | for (;;) { | ||
5286 | if (interactive && global_env.iop <= iostack) { | ||
5287 | #if ENABLE_FEATURE_EDITING | ||
5288 | current_prompt = prompt->value; | ||
5289 | #else | ||
5290 | prs(prompt->value); | ||
5291 | #endif | ||
5292 | } | ||
5293 | onecommand(); | ||
5294 | /* Ensure that getenv("PATH") stays current */ | ||
5295 | setenv("PATH", path->value, 1); | ||
5296 | } | ||
5297 | |||
5298 | DBGPRINTF(("MSH_MAIN: returning.\n")); | ||
5299 | } | ||
5300 | |||
5301 | |||
5302 | niro | 532 | /* |
5303 | * Copyright (c) 1987,1997, Prentice Hall | ||
5304 | * All rights reserved. | ||
5305 | * | ||
5306 | * Redistribution and use of the MINIX operating system in source and | ||
5307 | * binary forms, with or without modification, are permitted provided | ||
5308 | * that the following conditions are met: | ||
5309 | * | ||
5310 | * Redistributions of source code must retain the above copyright | ||
5311 | * notice, this list of conditions and the following disclaimer. | ||
5312 | * | ||
5313 | * Redistributions in binary form must reproduce the above | ||
5314 | * copyright notice, this list of conditions and the following | ||
5315 | * disclaimer in the documentation and/or other materials provided | ||
5316 | * with the distribution. | ||
5317 | * | ||
5318 | * Neither the name of Prentice Hall nor the names of the software | ||
5319 | * authors or contributors may be used to endorse or promote | ||
5320 | * products derived from this software without specific prior | ||
5321 | * written permission. | ||
5322 | * | ||
5323 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND | ||
5324 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, | ||
5325 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
5326 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | ||
5327 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE | ||
5328 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
5329 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
5330 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | ||
5331 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | ||
5332 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE | ||
5333 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | ||
5334 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
5335 | * | ||
5336 | */ |