Contents of /trunk/mkinitrd-magellan/busybox/shell/msh_unused.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (14 years, 3 months ago) by niro
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File size: 104912 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years, 3 months ago) by niro
File MIME type: text/plain
File size: 104912 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* 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 | #include <sys/times.h> |
16 | #include <setjmp.h> |
17 | |
18 | #ifdef STANDALONE |
19 | # ifndef _GNU_SOURCE |
20 | # define _GNU_SOURCE |
21 | # endif |
22 | # include <sys/types.h> |
23 | # include <sys/stat.h> |
24 | # include <sys/wait.h> |
25 | # include <signal.h> |
26 | # include <stdio.h> |
27 | # include <stdlib.h> |
28 | # include <unistd.h> |
29 | # include <string.h> |
30 | # include <errno.h> |
31 | # include <dirent.h> |
32 | # include <fcntl.h> |
33 | # include <ctype.h> |
34 | # include <assert.h> |
35 | # define bb_dev_null "/dev/null" |
36 | # define DEFAULT_SHELL "/proc/self/exe" |
37 | # define bb_banner "busybox standalone" |
38 | # define ENABLE_FEATURE_SH_STANDALONE 0 |
39 | # define bb_msg_memory_exhausted "memory exhausted" |
40 | # define xmalloc(size) malloc(size) |
41 | # define msh_main(argc,argv) main(argc,argv) |
42 | # define safe_read(fd,buf,count) read(fd,buf,count) |
43 | # define nonblock_safe_read(fd,buf,count) read(fd,buf,count) |
44 | # define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1]) |
45 | # define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1]) |
46 | # define NORETURN __attribute__ ((__noreturn__)) |
47 | static int find_applet_by_name(const char *applet) |
48 | { |
49 | return -1; |
50 | } |
51 | static char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) |
52 | { |
53 | unsigned i, out, res; |
54 | assert(sizeof(unsigned) == 4); |
55 | if (buflen) { |
56 | out = 0; |
57 | for (i = 1000000000; i; i /= 10) { |
58 | res = n / i; |
59 | if (res || out || i == 1) { |
60 | if (!--buflen) break; |
61 | out++; |
62 | n -= res*i; |
63 | *buf++ = '0' + res; |
64 | } |
65 | } |
66 | } |
67 | return buf; |
68 | } |
69 | static char *itoa_to_buf(int n, char *buf, unsigned buflen) |
70 | { |
71 | if (buflen && n < 0) { |
72 | n = -n; |
73 | *buf++ = '-'; |
74 | buflen--; |
75 | } |
76 | return utoa_to_buf((unsigned)n, buf, buflen); |
77 | } |
78 | static char local_buf[12]; |
79 | static char *itoa(int n) |
80 | { |
81 | *(itoa_to_buf(n, local_buf, sizeof(local_buf))) = '\0'; |
82 | return local_buf; |
83 | } |
84 | #else |
85 | # include "busybox.h" /* for applet_names */ |
86 | #endif |
87 | |
88 | //#define MSHDEBUG 4 |
89 | |
90 | #ifdef MSHDEBUG |
91 | static int mshdbg = MSHDEBUG; |
92 | |
93 | #define DBGPRINTF(x) if (mshdbg > 0) printf x |
94 | #define DBGPRINTF0(x) if (mshdbg > 0) printf x |
95 | #define DBGPRINTF1(x) if (mshdbg > 1) printf x |
96 | #define DBGPRINTF2(x) if (mshdbg > 2) printf x |
97 | #define DBGPRINTF3(x) if (mshdbg > 3) printf x |
98 | #define DBGPRINTF4(x) if (mshdbg > 4) printf x |
99 | #define DBGPRINTF5(x) if (mshdbg > 5) printf x |
100 | #define DBGPRINTF6(x) if (mshdbg > 6) printf x |
101 | #define DBGPRINTF7(x) if (mshdbg > 7) printf x |
102 | #define DBGPRINTF8(x) if (mshdbg > 8) printf x |
103 | #define DBGPRINTF9(x) if (mshdbg > 9) printf x |
104 | |
105 | static int mshdbg_rc = 0; |
106 | |
107 | #define RCPRINTF(x) if (mshdbg_rc) printf x |
108 | |
109 | #else |
110 | |
111 | #define DBGPRINTF(x) |
112 | #define DBGPRINTF0(x) ((void)0) |
113 | #define DBGPRINTF1(x) ((void)0) |
114 | #define DBGPRINTF2(x) ((void)0) |
115 | #define DBGPRINTF3(x) ((void)0) |
116 | #define DBGPRINTF4(x) ((void)0) |
117 | #define DBGPRINTF5(x) ((void)0) |
118 | #define DBGPRINTF6(x) ((void)0) |
119 | #define DBGPRINTF7(x) ((void)0) |
120 | #define DBGPRINTF8(x) ((void)0) |
121 | #define DBGPRINTF9(x) ((void)0) |
122 | |
123 | #define RCPRINTF(x) ((void)0) |
124 | |
125 | #endif /* MSHDEBUG */ |
126 | |
127 | |
128 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT |
129 | # define DEFAULT_ROOT_PROMPT "\\u:\\w> " |
130 | # define DEFAULT_USER_PROMPT "\\u:\\w$ " |
131 | #else |
132 | # define DEFAULT_ROOT_PROMPT "# " |
133 | # define DEFAULT_USER_PROMPT "$ " |
134 | #endif |
135 | |
136 | |
137 | /* -------- sh.h -------- */ |
138 | /* |
139 | * shell |
140 | */ |
141 | |
142 | #define LINELIM 2100 |
143 | #define NPUSH 8 /* limit to input nesting */ |
144 | |
145 | #undef NOFILE |
146 | #define NOFILE 20 /* Number of open files */ |
147 | #define NUFILE 10 /* Number of user-accessible files */ |
148 | #define FDBASE 10 /* First file usable by Shell */ |
149 | |
150 | /* |
151 | * values returned by wait |
152 | */ |
153 | #define WAITSIG(s) ((s) & 0177) |
154 | #define WAITVAL(s) (((s) >> 8) & 0377) |
155 | #define WAITCORE(s) (((s) & 0200) != 0) |
156 | |
157 | /* |
158 | * library and system definitions |
159 | */ |
160 | typedef void xint; /* base type of jmp_buf, for not broken compilers */ |
161 | |
162 | /* |
163 | * shell components |
164 | */ |
165 | #define NOBLOCK ((struct op *)NULL) |
166 | #define NOWORD ((char *)NULL) |
167 | #define NOWORDS ((char **)NULL) |
168 | #define NOPIPE ((int *)NULL) |
169 | |
170 | /* |
171 | * redirection |
172 | */ |
173 | struct ioword { |
174 | smallint io_flag; /* action (below) */ |
175 | int io_fd; /* fd affected */ |
176 | char *io_name; /* file name */ |
177 | }; |
178 | |
179 | #define IOREAD 1 /* < */ |
180 | #define IOHERE 2 /* << (here file) */ |
181 | #define IOWRITE 4 /* > */ |
182 | #define IOCAT 8 /* >> */ |
183 | #define IOXHERE 16 /* ${}, ` in << */ |
184 | #define IODUP 32 /* >&digit */ |
185 | #define IOCLOSE 64 /* >&- */ |
186 | |
187 | #define IODEFAULT (-1) /* "default" IO fd */ |
188 | |
189 | |
190 | /* |
191 | * Description of a command or an operation on commands. |
192 | * Might eventually use a union. |
193 | */ |
194 | struct op { |
195 | smallint op_type; /* operation type, see Txxxx below */ |
196 | char **op_words; /* arguments to a command */ |
197 | struct ioword **ioact; /* IO actions (eg, < > >>) */ |
198 | struct op *left; |
199 | struct op *right; |
200 | char *str; /* identifier for case and for */ |
201 | }; |
202 | |
203 | #define TCOM 1 /* command */ |
204 | #define TPAREN 2 /* (c-list) */ |
205 | #define TPIPE 3 /* a | b */ |
206 | #define TLIST 4 /* a [&;] b */ |
207 | #define TOR 5 /* || */ |
208 | #define TAND 6 /* && */ |
209 | #define TFOR 7 |
210 | #define TDO 8 |
211 | #define TCASE 9 |
212 | #define TIF 10 |
213 | #define TWHILE 11 |
214 | #define TUNTIL 12 |
215 | #define TELIF 13 |
216 | #define TPAT 14 /* pattern in case */ |
217 | #define TBRACE 15 /* {c-list} */ |
218 | #define TASYNC 16 /* c & */ |
219 | /* Added to support "." file expansion */ |
220 | #define TDOT 17 |
221 | |
222 | /* Strings for names to make debug easier */ |
223 | #ifdef MSHDEBUG |
224 | static const char *const T_CMD_NAMES[] = { |
225 | "PLACEHOLDER", |
226 | "TCOM", |
227 | "TPAREN", |
228 | "TPIPE", |
229 | "TLIST", |
230 | "TOR", |
231 | "TAND", |
232 | "TFOR", |
233 | "TDO", |
234 | "TCASE", |
235 | "TIF", |
236 | "TWHILE", |
237 | "TUNTIL", |
238 | "TELIF", |
239 | "TPAT", |
240 | "TBRACE", |
241 | "TASYNC", |
242 | "TDOT", |
243 | }; |
244 | #endif |
245 | |
246 | #define AREASIZE (90000) |
247 | |
248 | /* |
249 | * flags to control evaluation of words |
250 | */ |
251 | #define DOSUB 1 /* interpret $, `, and quotes */ |
252 | #define DOBLANK 2 /* perform blank interpretation */ |
253 | #define DOGLOB 4 /* interpret [?* */ |
254 | #define DOKEY 8 /* move words with `=' to 2nd arg. list */ |
255 | #define DOTRIM 16 /* trim resulting string */ |
256 | |
257 | #define DOALL (DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM) |
258 | |
259 | |
260 | struct brkcon { |
261 | jmp_buf brkpt; |
262 | struct brkcon *nextlev; |
263 | }; |
264 | |
265 | |
266 | static smallint trapset; /* trap pending (signal number) */ |
267 | |
268 | static smallint yynerrs; /* yacc (flag) */ |
269 | |
270 | /* moved to G: static char line[LINELIM]; */ |
271 | |
272 | #if ENABLE_FEATURE_EDITING |
273 | static char *current_prompt; |
274 | static line_input_t *line_input_state; |
275 | #endif |
276 | |
277 | |
278 | /* |
279 | * other functions |
280 | */ |
281 | static const char *rexecve(char *c, char **v, char **envp); |
282 | static char *evalstr(char *cp, int f); |
283 | static char *putn(int n); |
284 | static char *unquote(char *as); |
285 | static int rlookup(char *n); |
286 | static struct wdblock *glob(char *cp, struct wdblock *wb); |
287 | static int my_getc(int ec); |
288 | static int subgetc(char ec, int quoted); |
289 | static char **makenv(int all, struct wdblock *wb); |
290 | static char **eval(char **ap, int f); |
291 | static int setstatus(int s); |
292 | static int waitfor(int lastpid, int canintr); |
293 | |
294 | static void onintr(int s); /* SIGINT handler */ |
295 | |
296 | static int newenv(int f); |
297 | static void quitenv(void); |
298 | static void next(int f); |
299 | static void setdash(void); |
300 | static void onecommand(void); |
301 | static void runtrap(int i); |
302 | |
303 | |
304 | /* -------- area stuff -------- */ |
305 | |
306 | #define REGSIZE sizeof(struct region) |
307 | #define GROWBY (256) |
308 | /* #define SHRINKBY (64) */ |
309 | #undef SHRINKBY |
310 | #define FREE (32767) |
311 | #define BUSY (0) |
312 | #define ALIGN (sizeof(int)-1) |
313 | |
314 | |
315 | struct region { |
316 | struct region *next; |
317 | int area; |
318 | }; |
319 | |
320 | |
321 | /* -------- grammar stuff -------- */ |
322 | typedef union { |
323 | char *cp; |
324 | char **wp; |
325 | int i; |
326 | struct op *o; |
327 | } YYSTYPE; |
328 | |
329 | #define WORD 256 |
330 | #define LOGAND 257 |
331 | #define LOGOR 258 |
332 | #define BREAK 259 |
333 | #define IF 260 |
334 | #define THEN 261 |
335 | #define ELSE 262 |
336 | #define ELIF 263 |
337 | #define FI 264 |
338 | #define CASE 265 |
339 | #define ESAC 266 |
340 | #define FOR 267 |
341 | #define WHILE 268 |
342 | #define UNTIL 269 |
343 | #define DO 270 |
344 | #define DONE 271 |
345 | #define IN 272 |
346 | /* Added for "." file expansion */ |
347 | #define DOT 273 |
348 | |
349 | #define YYERRCODE 300 |
350 | |
351 | /* flags to yylex */ |
352 | #define CONTIN 01 /* skip new lines to complete command */ |
353 | |
354 | static struct op *pipeline(int cf); |
355 | static struct op *andor(void); |
356 | static struct op *c_list(void); |
357 | static int synio(int cf); |
358 | static void musthave(int c, int cf); |
359 | static struct op *simple(void); |
360 | static struct op *nested(int type, int mark); |
361 | static struct op *command(int cf); |
362 | static struct op *dogroup(int onlydone); |
363 | static struct op *thenpart(void); |
364 | static struct op *elsepart(void); |
365 | static struct op *caselist(void); |
366 | static struct op *casepart(void); |
367 | static char **pattern(void); |
368 | static char **wordlist(void); |
369 | static struct op *list(struct op *t1, struct op *t2); |
370 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp); |
371 | static struct op *newtp(void); |
372 | static struct op *namelist(struct op *t); |
373 | static char **copyw(void); |
374 | static void word(char *cp); |
375 | static struct ioword **copyio(void); |
376 | static struct ioword *io(int u, int f, char *cp); |
377 | static int yylex(int cf); |
378 | static int collect(int c, int c1); |
379 | static int dual(int c); |
380 | static void diag(int ec); |
381 | static char *tree(unsigned size); |
382 | |
383 | /* -------- var.h -------- */ |
384 | |
385 | struct var { |
386 | char *value; |
387 | char *name; |
388 | struct var *next; |
389 | char status; |
390 | }; |
391 | |
392 | #define COPYV 1 /* flag to setval, suggesting copy */ |
393 | #define RONLY 01 /* variable is read-only */ |
394 | #define EXPORT 02 /* variable is to be exported */ |
395 | #define GETCELL 04 /* name & value space was got with getcell */ |
396 | |
397 | static int yyparse(void); |
398 | |
399 | |
400 | /* -------- io.h -------- */ |
401 | /* io buffer */ |
402 | struct iobuf { |
403 | unsigned id; /* buffer id */ |
404 | char buf[512]; /* buffer */ |
405 | char *bufp; /* pointer into buffer */ |
406 | char *ebufp; /* pointer to end of buffer */ |
407 | }; |
408 | |
409 | /* possible arguments to an IO function */ |
410 | struct ioarg { |
411 | const char *aword; |
412 | char **awordlist; |
413 | int afile; /* file descriptor */ |
414 | unsigned afid; /* buffer id */ |
415 | off_t afpos; /* file position */ |
416 | struct iobuf *afbuf; /* buffer for this file */ |
417 | }; |
418 | |
419 | /* an input generator's state */ |
420 | struct io { |
421 | int (*iofn) (struct ioarg *, struct io *); |
422 | struct ioarg *argp; |
423 | int peekc; |
424 | char prev; /* previous character read by readc() */ |
425 | char nlcount; /* for `'s */ |
426 | char xchar; /* for `'s */ |
427 | char task; /* reason for pushed IO */ |
428 | }; |
429 | /* ->task: */ |
430 | #define XOTHER 0 /* none of the below */ |
431 | #define XDOLL 1 /* expanding ${} */ |
432 | #define XGRAVE 2 /* expanding `'s */ |
433 | #define XIO 3 /* file IO */ |
434 | |
435 | |
436 | /* |
437 | * input generators for IO structure |
438 | */ |
439 | static int nlchar(struct ioarg *ap); |
440 | static int strchar(struct ioarg *ap); |
441 | static int qstrchar(struct ioarg *ap); |
442 | static int filechar(struct ioarg *ap); |
443 | static int herechar(struct ioarg *ap); |
444 | static int linechar(struct ioarg *ap); |
445 | static int gravechar(struct ioarg *ap, struct io *iop); |
446 | static int qgravechar(struct ioarg *ap, struct io *iop); |
447 | static int dolchar(struct ioarg *ap); |
448 | static int wdchar(struct ioarg *ap); |
449 | static void scraphere(void); |
450 | static void freehere(int area); |
451 | static void gethere(void); |
452 | static void markhere(char *s, struct ioword *iop); |
453 | static int herein(char *hname, int xdoll); |
454 | static int run(struct ioarg *argp, int (*f) (struct ioarg *)); |
455 | |
456 | |
457 | static int eofc(void); |
458 | static int readc(void); |
459 | static void unget(int c); |
460 | static void ioecho(char c); |
461 | |
462 | |
463 | /* |
464 | * IO control |
465 | */ |
466 | static void pushio(struct ioarg *argp, int (*f) (struct ioarg *)); |
467 | #define PUSHIO(what,arg,gen) ((temparg.what = (arg)), pushio(&temparg,(gen))) |
468 | static int remap(int fd); |
469 | static int openpipe(int *pv); |
470 | static void closepipe(int *pv); |
471 | static struct io *setbase(struct io *ip); |
472 | |
473 | /* -------- word.h -------- */ |
474 | |
475 | #define NSTART 16 /* default number of words to allow for initially */ |
476 | |
477 | struct wdblock { |
478 | short w_bsize; |
479 | short w_nword; |
480 | /* bounds are arbitrary */ |
481 | char *w_words[1]; |
482 | }; |
483 | |
484 | static struct wdblock *addword(char *wd, struct wdblock *wb); |
485 | static struct wdblock *newword(int nw); |
486 | static char **getwords(struct wdblock *wb); |
487 | |
488 | /* -------- misc stuff -------- */ |
489 | |
490 | static int dolabel(struct op *t, char **args); |
491 | static int dohelp(struct op *t, char **args); |
492 | static int dochdir(struct op *t, char **args); |
493 | static int doshift(struct op *t, char **args); |
494 | static int dologin(struct op *t, char **args); |
495 | static int doumask(struct op *t, char **args); |
496 | static int doexec(struct op *t, char **args); |
497 | static int dodot(struct op *t, char **args); |
498 | static int dowait(struct op *t, char **args); |
499 | static int doread(struct op *t, char **args); |
500 | static int doeval(struct op *t, char **args); |
501 | static int dotrap(struct op *t, char **args); |
502 | static int dobreak(struct op *t, char **args); |
503 | static int doexit(struct op *t, char **args); |
504 | static int doexport(struct op *t, char **args); |
505 | static int doreadonly(struct op *t, char **args); |
506 | static int doset(struct op *t, char **args); |
507 | static int dotimes(struct op *t, char **args); |
508 | static int docontinue(struct op *t, char **args); |
509 | |
510 | static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp); |
511 | static int execute(struct op *t, int *pin, int *pout, int no_fork); |
512 | static int iosetup(struct ioword *iop, int pipein, int pipeout); |
513 | static void brkset(struct brkcon *bc); |
514 | static int getsig(char *s); |
515 | static void setsig(int n, sighandler_t f); |
516 | static int getn(char *as); |
517 | static int brkcontin(char *cp, int val); |
518 | static void rdexp(char **wp, void (*f) (struct var *), int key); |
519 | static void badid(char *s); |
520 | static void varput(char *s, int out); |
521 | static int expand(const char *cp, struct wdblock **wbp, int f); |
522 | static char *blank(int f); |
523 | static int dollar(int quoted); |
524 | static int grave(int quoted); |
525 | static void globname(char *we, char *pp); |
526 | static char *generate(char *start1, char *end1, char *middle, char *end); |
527 | static int anyspcl(struct wdblock *wb); |
528 | static void readhere(char **name, char *s, int ec); |
529 | static int xxchar(struct ioarg *ap); |
530 | |
531 | struct here { |
532 | char *h_tag; |
533 | char h_dosub; |
534 | struct ioword *h_iop; |
535 | struct here *h_next; |
536 | }; |
537 | |
538 | static const char *const signame[] = { |
539 | "Signal 0", |
540 | "Hangup", |
541 | NULL, /* interrupt */ |
542 | "Quit", |
543 | "Illegal instruction", |
544 | "Trace/BPT trap", |
545 | "Abort", |
546 | "Bus error", |
547 | "Floating Point Exception", |
548 | "Killed", |
549 | "SIGUSR1", |
550 | "SIGSEGV", |
551 | "SIGUSR2", |
552 | NULL, /* broken pipe */ |
553 | "Alarm clock", |
554 | "Terminated" |
555 | }; |
556 | |
557 | |
558 | typedef int (*builtin_func_ptr)(struct op *, char **); |
559 | |
560 | struct builtincmd { |
561 | const char *name; |
562 | builtin_func_ptr builtinfunc; |
563 | }; |
564 | |
565 | static const struct builtincmd builtincmds[] = { |
566 | { "." , dodot }, |
567 | { ":" , dolabel }, |
568 | { "break" , dobreak }, |
569 | { "cd" , dochdir }, |
570 | { "continue", docontinue }, |
571 | { "eval" , doeval }, |
572 | { "exec" , doexec }, |
573 | { "exit" , doexit }, |
574 | { "export" , doexport }, |
575 | { "help" , dohelp }, |
576 | { "login" , dologin }, |
577 | { "newgrp" , dologin }, |
578 | { "read" , doread }, |
579 | { "readonly", doreadonly }, |
580 | { "set" , doset }, |
581 | { "shift" , doshift }, |
582 | { "times" , dotimes }, |
583 | { "trap" , dotrap }, |
584 | { "umask" , doumask }, |
585 | { "wait" , dowait }, |
586 | { NULL , NULL }, |
587 | }; |
588 | |
589 | static struct op *dowholefile(int /*, int*/); |
590 | |
591 | |
592 | /* Globals */ |
593 | static char **dolv; |
594 | static int dolc; |
595 | static uint8_t exstat; |
596 | static smallint gflg; /* (seems to be a parse error indicator) */ |
597 | static smallint interactive; /* Is this an interactive shell */ |
598 | static smallint execflg; |
599 | static smallint isbreak; /* "break" statement was seen */ |
600 | static int multiline; /* '\n' changed to ';' (counter) */ |
601 | static struct op *outtree; /* result from parser */ |
602 | static xint *failpt; |
603 | static xint *errpt; |
604 | static struct brkcon *brklist; |
605 | static struct wdblock *wdlist; |
606 | static struct wdblock *iolist; |
607 | |
608 | #ifdef MSHDEBUG |
609 | static struct var *mshdbg_var; |
610 | #endif |
611 | static struct var *vlist; /* dictionary */ |
612 | static struct var *homedir; /* home directory */ |
613 | static struct var *prompt; /* main prompt */ |
614 | static struct var *cprompt; /* continuation prompt */ |
615 | static struct var *path; /* search path for commands */ |
616 | static struct var *shell; /* shell to interpret command files */ |
617 | static struct var *ifs; /* field separators */ |
618 | |
619 | static int areanum; /* current allocation area */ |
620 | static smallint intr; /* interrupt pending (bool) */ |
621 | static smallint heedint = 1; /* heed interrupt signals (bool) */ |
622 | static int inparse; |
623 | static char *null = (char*)""; /* null value for variable */ |
624 | static void (*qflag)(int) = SIG_IGN; |
625 | static int startl; |
626 | static int peeksym; |
627 | static int nlseen; |
628 | static int iounit = IODEFAULT; |
629 | static YYSTYPE yylval; |
630 | static char *elinep; /* done in main(): = line + sizeof(line) - 5 */ |
631 | |
632 | static struct here *inhere; /* list of hear docs while parsing */ |
633 | static struct here *acthere; /* list of active here documents */ |
634 | static struct region *areabot; /* bottom of area */ |
635 | static struct region *areatop; /* top of area */ |
636 | static struct region *areanxt; /* starting point of scan */ |
637 | static void *brktop; |
638 | static void *brkaddr; |
639 | |
640 | #define AFID_NOBUF (~0) |
641 | #define AFID_ID 0 |
642 | |
643 | |
644 | /* |
645 | * parsing & execution environment |
646 | */ |
647 | struct env { |
648 | char *linep; |
649 | struct io *iobase; |
650 | struct io *iop; |
651 | xint *errpt; /* void * */ |
652 | int iofd; |
653 | struct env *oenv; |
654 | }; |
655 | |
656 | |
657 | struct globals { |
658 | struct env global_env; |
659 | struct ioarg temparg; // = { .afid = AFID_NOBUF }; /* temporary for PUSHIO */ |
660 | unsigned bufid; // = AFID_ID; /* buffer id counter */ |
661 | char ourtrap[_NSIG + 1]; |
662 | char *trap[_NSIG + 1]; |
663 | struct iobuf sharedbuf; /* in main(): set to { AFID_NOBUF } */ |
664 | struct iobuf mainbuf; /* in main(): set to { AFID_NOBUF } */ |
665 | struct ioarg ioargstack[NPUSH]; |
666 | /* |
667 | * flags: |
668 | * -e: quit on error |
669 | * -k: look for name=value everywhere on command line |
670 | * -n: no execution |
671 | * -t: exit after reading and executing one command |
672 | * -v: echo as read |
673 | * -x: trace |
674 | * -u: unset variables net diagnostic |
675 | */ |
676 | char flags['z' - 'a' + 1]; |
677 | char filechar_cmdbuf[BUFSIZ]; |
678 | char line[LINELIM]; |
679 | char child_cmd[LINELIM]; |
680 | |
681 | struct io iostack[NPUSH]; |
682 | |
683 | char grave__var_name[LINELIM]; |
684 | char grave__alt_value[LINELIM]; |
685 | }; |
686 | |
687 | #define G (*ptr_to_globals) |
688 | #define global_env (G.global_env ) |
689 | #define temparg (G.temparg ) |
690 | #define bufid (G.bufid ) |
691 | #define ourtrap (G.ourtrap ) |
692 | #define trap (G.trap ) |
693 | #define sharedbuf (G.sharedbuf ) |
694 | #define mainbuf (G.mainbuf ) |
695 | #define ioargstack (G.ioargstack ) |
696 | /* this looks weird, but is OK ... we index FLAG with 'a'...'z' */ |
697 | #define FLAG (G.flags - 'a' ) |
698 | #define filechar_cmdbuf (G.filechar_cmdbuf) |
699 | #define line (G.line ) |
700 | #define child_cmd (G.child_cmd ) |
701 | #define iostack (G.iostack ) |
702 | #define INIT_G() do { \ |
703 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
704 | global_env.linep = line; \ |
705 | global_env.iobase = iostack; \ |
706 | global_env.iop = iostack - 1; \ |
707 | global_env.iofd = FDBASE; \ |
708 | temparg.afid = AFID_NOBUF; \ |
709 | bufid = AFID_ID; \ |
710 | } while (0) |
711 | |
712 | |
713 | /* in substitution */ |
714 | #define INSUB() (global_env.iop->task == XGRAVE || global_env.iop->task == XDOLL) |
715 | |
716 | #define RUN(what, arg, gen) ((temparg.what = (arg)), run(&temparg, (gen))) |
717 | |
718 | #ifdef MSHDEBUG |
719 | static void print_tree(struct op *head) |
720 | { |
721 | if (head == NULL) { |
722 | DBGPRINTF(("PRINT_TREE: no tree\n")); |
723 | return; |
724 | } |
725 | |
726 | DBGPRINTF(("NODE: %p, left %p, right %p\n", head, head->left, |
727 | head->right)); |
728 | |
729 | if (head->left) |
730 | print_tree(head->left); |
731 | |
732 | if (head->right) |
733 | print_tree(head->right); |
734 | } |
735 | #endif /* MSHDEBUG */ |
736 | |
737 | |
738 | /* |
739 | * IO functions |
740 | */ |
741 | static void prs(const char *s) |
742 | { |
743 | if (*s) |
744 | xwrite_str(STDERR_FILENO, s); |
745 | } |
746 | |
747 | static void prn(unsigned u) |
748 | { |
749 | prs(itoa(u)); |
750 | } |
751 | |
752 | static void echo(char **wp) |
753 | { |
754 | int i; |
755 | |
756 | prs("+"); |
757 | for (i = 0; wp[i]; i++) { |
758 | if (i) |
759 | prs(" "); |
760 | prs(wp[i]); |
761 | } |
762 | prs("\n"); |
763 | } |
764 | |
765 | static void closef(int i) |
766 | { |
767 | if (i > 2) |
768 | close(i); |
769 | } |
770 | |
771 | static void closeall(void) |
772 | { |
773 | int u; |
774 | |
775 | for (u = NUFILE; u < NOFILE;) |
776 | close(u++); |
777 | } |
778 | |
779 | |
780 | /* fail but return to process next command */ |
781 | static void fail(void) NORETURN; |
782 | static void fail(void) |
783 | { |
784 | longjmp(failpt, 1); |
785 | /* NOTREACHED */ |
786 | } |
787 | |
788 | /* abort shell (or fail in subshell) */ |
789 | static void leave(void) NORETURN; |
790 | static void leave(void) |
791 | { |
792 | DBGPRINTF(("LEAVE: leave called!\n")); |
793 | |
794 | if (execflg) |
795 | fail(); |
796 | scraphere(); |
797 | freehere(1); |
798 | runtrap(0); |
799 | _exit(exstat); |
800 | /* NOTREACHED */ |
801 | } |
802 | |
803 | static void warn(const char *s) |
804 | { |
805 | if (*s) { |
806 | prs(s); |
807 | if (!exstat) |
808 | exstat = 255; |
809 | } |
810 | prs("\n"); |
811 | if (FLAG['e']) |
812 | leave(); |
813 | } |
814 | |
815 | static void err(const char *s) |
816 | { |
817 | warn(s); |
818 | if (FLAG['n']) |
819 | return; |
820 | if (!interactive) |
821 | leave(); |
822 | if (global_env.errpt) |
823 | longjmp(global_env.errpt, 1); |
824 | closeall(); |
825 | global_env.iop = global_env.iobase = iostack; |
826 | } |
827 | |
828 | |
829 | /* -------- area.c -------- */ |
830 | |
831 | /* |
832 | * All memory between (char *)areabot and (char *)(areatop+1) is |
833 | * exclusively administered by the area management routines. |
834 | * It is assumed that sbrk() and brk() manipulate the high end. |
835 | */ |
836 | |
837 | #define sbrk(X) ({ \ |
838 | void * __q = (void *)-1; \ |
839 | if (brkaddr + (int)(X) < brktop) { \ |
840 | __q = brkaddr; \ |
841 | brkaddr += (int)(X); \ |
842 | } \ |
843 | __q; \ |
844 | }) |
845 | |
846 | static void initarea(void) |
847 | { |
848 | brkaddr = xmalloc(AREASIZE); |
849 | brktop = brkaddr + AREASIZE; |
850 | |
851 | while ((long) sbrk(0) & ALIGN) |
852 | sbrk(1); |
853 | areabot = (struct region *) sbrk(REGSIZE); |
854 | |
855 | areabot->next = areabot; |
856 | areabot->area = BUSY; |
857 | areatop = areabot; |
858 | areanxt = areabot; |
859 | } |
860 | |
861 | static char *getcell(unsigned nbytes) |
862 | { |
863 | int nregio; |
864 | struct region *p, *q; |
865 | int i; |
866 | |
867 | if (nbytes == 0) { |
868 | puts("getcell(0)"); |
869 | abort(); |
870 | } |
871 | /* silly and defeats the algorithm */ |
872 | /* |
873 | * round upwards and add administration area |
874 | */ |
875 | nregio = (nbytes + (REGSIZE - 1)) / REGSIZE + 1; |
876 | p = areanxt; |
877 | for (;;) { |
878 | if (p->area > areanum) { |
879 | /* |
880 | * merge free cells |
881 | */ |
882 | while ((q = p->next)->area > areanum && q != areanxt) |
883 | p->next = q->next; |
884 | /* |
885 | * exit loop if cell big enough |
886 | */ |
887 | if (q >= p + nregio) |
888 | goto found; |
889 | } |
890 | p = p->next; |
891 | if (p == areanxt) |
892 | break; |
893 | } |
894 | i = nregio >= GROWBY ? nregio : GROWBY; |
895 | p = (struct region *) sbrk(i * REGSIZE); |
896 | if (p == (struct region *) -1) |
897 | return NULL; |
898 | p--; |
899 | if (p != areatop) { |
900 | puts("not contig"); |
901 | abort(); /* allocated areas are contiguous */ |
902 | } |
903 | q = p + i; |
904 | p->next = q; |
905 | p->area = FREE; |
906 | q->next = areabot; |
907 | q->area = BUSY; |
908 | areatop = q; |
909 | found: |
910 | /* |
911 | * we found a FREE area big enough, pointed to by 'p', and up to 'q' |
912 | */ |
913 | areanxt = p + nregio; |
914 | if (areanxt < q) { |
915 | /* |
916 | * split into requested area and rest |
917 | */ |
918 | if (areanxt + 1 > q) { |
919 | puts("OOM"); |
920 | abort(); /* insufficient space left for admin */ |
921 | } |
922 | areanxt->next = q; |
923 | areanxt->area = FREE; |
924 | p->next = areanxt; |
925 | } |
926 | p->area = areanum; |
927 | return (char *) (p + 1); |
928 | } |
929 | |
930 | static void freecell(char *cp) |
931 | { |
932 | struct region *p; |
933 | |
934 | p = (struct region *) cp; |
935 | if (p != NULL) { |
936 | p--; |
937 | if (p < areanxt) |
938 | areanxt = p; |
939 | p->area = FREE; |
940 | } |
941 | } |
942 | #define DELETE(obj) freecell((char *)obj) |
943 | |
944 | static void freearea(int a) |
945 | { |
946 | struct region *p, *top; |
947 | |
948 | top = areatop; |
949 | for (p = areabot; p != top; p = p->next) |
950 | if (p->area >= a) |
951 | p->area = FREE; |
952 | } |
953 | |
954 | static void setarea(char *cp, int a) |
955 | { |
956 | struct region *p; |
957 | |
958 | p = (struct region *) cp; |
959 | if (p != NULL) |
960 | (p - 1)->area = a; |
961 | } |
962 | |
963 | static int getarea(char *cp) |
964 | { |
965 | return ((struct region *) cp - 1)->area; |
966 | } |
967 | |
968 | static void garbage(void) |
969 | { |
970 | struct region *p, *q, *top; |
971 | |
972 | top = areatop; |
973 | for (p = areabot; p != top; p = p->next) { |
974 | if (p->area > areanum) { |
975 | while ((q = p->next)->area > areanum) |
976 | p->next = q->next; |
977 | areanxt = p; |
978 | } |
979 | } |
980 | #ifdef SHRINKBY |
981 | if (areatop >= q + SHRINKBY && q->area > areanum) { |
982 | brk((char *) (q + 1)); |
983 | q->next = areabot; |
984 | q->area = BUSY; |
985 | areatop = q; |
986 | } |
987 | #endif |
988 | } |
989 | |
990 | static void *get_space(int n) |
991 | { |
992 | char *cp; |
993 | |
994 | cp = getcell(n); |
995 | if (cp == NULL) |
996 | err("out of string space"); |
997 | return cp; |
998 | } |
999 | |
1000 | static char *strsave(const char *s, int a) |
1001 | { |
1002 | char *cp; |
1003 | |
1004 | cp = get_space(strlen(s) + 1); |
1005 | if (cp == NULL) { |
1006 | // FIXME: I highly doubt this is good. |
1007 | return (char*)""; |
1008 | } |
1009 | setarea(cp, a); |
1010 | strcpy(cp, s); |
1011 | return cp; |
1012 | } |
1013 | |
1014 | |
1015 | /* -------- var.c -------- */ |
1016 | |
1017 | static int eqname(const char *n1, const char *n2) |
1018 | { |
1019 | for (; *n1 != '=' && *n1 != '\0'; n1++) |
1020 | if (*n2++ != *n1) |
1021 | return 0; |
1022 | return *n2 == '\0' || *n2 == '='; |
1023 | } |
1024 | |
1025 | static const char *findeq(const char *cp) |
1026 | { |
1027 | while (*cp != '\0' && *cp != '=') |
1028 | cp++; |
1029 | return cp; |
1030 | } |
1031 | |
1032 | /* |
1033 | * Find the given name in the dictionary |
1034 | * and return its value. If the name was |
1035 | * not previously there, enter it now and |
1036 | * return a null value. |
1037 | */ |
1038 | static struct var *lookup(const char *n) |
1039 | { |
1040 | // FIXME: dirty hack |
1041 | static struct var dummy; |
1042 | |
1043 | struct var *vp; |
1044 | const char *cp; |
1045 | char *xp; |
1046 | int c; |
1047 | |
1048 | if (isdigit(*n)) { |
1049 | dummy.name = (char*)n; |
1050 | for (c = 0; isdigit(*n) && c < 1000; n++) |
1051 | c = c * 10 + *n - '0'; |
1052 | dummy.status = RONLY; |
1053 | dummy.value = (c <= dolc ? dolv[c] : null); |
1054 | return &dummy; |
1055 | } |
1056 | |
1057 | for (vp = vlist; vp; vp = vp->next) |
1058 | if (eqname(vp->name, n)) |
1059 | return vp; |
1060 | |
1061 | cp = findeq(n); |
1062 | vp = get_space(sizeof(*vp)); |
1063 | if (vp == 0 || (vp->name = get_space((int) (cp - n) + 2)) == NULL) { |
1064 | dummy.name = dummy.value = (char*)""; |
1065 | return &dummy; |
1066 | } |
1067 | |
1068 | xp = vp->name; |
1069 | while ((*xp = *n++) != '\0' && *xp != '=') |
1070 | xp++; |
1071 | *xp++ = '='; |
1072 | *xp = '\0'; |
1073 | setarea((char *) vp, 0); |
1074 | setarea((char *) vp->name, 0); |
1075 | vp->value = null; |
1076 | vp->next = vlist; |
1077 | vp->status = GETCELL; |
1078 | vlist = vp; |
1079 | return vp; |
1080 | } |
1081 | |
1082 | /* |
1083 | * if name is not NULL, it must be |
1084 | * a prefix of the space `val', |
1085 | * and end with `='. |
1086 | * this is all so that exporting |
1087 | * values is reasonably painless. |
1088 | */ |
1089 | static void nameval(struct var *vp, const char *val, const char *name) |
1090 | { |
1091 | const char *cp; |
1092 | char *xp; |
1093 | int fl; |
1094 | |
1095 | if (vp->status & RONLY) { |
1096 | xp = vp->name; |
1097 | while (*xp && *xp != '=') |
1098 | fputc(*xp++, stderr); |
1099 | err(" is read-only"); |
1100 | return; |
1101 | } |
1102 | fl = 0; |
1103 | if (name == NULL) { |
1104 | xp = get_space(strlen(vp->name) + strlen(val) + 2); |
1105 | if (xp == NULL) |
1106 | return; |
1107 | /* make string: name=value */ |
1108 | setarea(xp, 0); |
1109 | name = xp; |
1110 | cp = vp->name; |
1111 | while ((*xp = *cp++) != '\0' && *xp != '=') |
1112 | xp++; |
1113 | *xp++ = '='; |
1114 | strcpy(xp, val); |
1115 | val = xp; |
1116 | fl = GETCELL; |
1117 | } |
1118 | if (vp->status & GETCELL) |
1119 | freecell(vp->name); /* form new string `name=value' */ |
1120 | vp->name = (char*)name; |
1121 | vp->value = (char*)val; |
1122 | vp->status |= fl; |
1123 | } |
1124 | |
1125 | /* |
1126 | * give variable at `vp' the value `val'. |
1127 | */ |
1128 | static void setval(struct var *vp, const char *val) |
1129 | { |
1130 | nameval(vp, val, NULL); |
1131 | } |
1132 | |
1133 | static void export(struct var *vp) |
1134 | { |
1135 | vp->status |= EXPORT; |
1136 | } |
1137 | |
1138 | static void ronly(struct var *vp) |
1139 | { |
1140 | if (isalpha(vp->name[0]) || vp->name[0] == '_') /* not an internal symbol */ |
1141 | vp->status |= RONLY; |
1142 | } |
1143 | |
1144 | static int isassign(const char *s) |
1145 | { |
1146 | unsigned char c; |
1147 | DBGPRINTF7(("ISASSIGN: enter, s=%s\n", s)); |
1148 | |
1149 | c = *s; |
1150 | /* no isalpha() - we shouldn't use locale */ |
1151 | /* c | 0x20 - lowercase (Latin) letters */ |
1152 | if (c != '_' && (unsigned)((c|0x20) - 'a') > 25) |
1153 | /* not letter */ |
1154 | return 0; |
1155 | |
1156 | while (1) { |
1157 | c = *++s; |
1158 | if (c == '=') |
1159 | return 1; |
1160 | if (c == '\0') |
1161 | return 0; |
1162 | if (c != '_' |
1163 | && (unsigned)(c - '0') > 9 /* not number */ |
1164 | && (unsigned)((c|0x20) - 'a') > 25 /* not letter */ |
1165 | ) { |
1166 | return 0; |
1167 | } |
1168 | } |
1169 | } |
1170 | |
1171 | static int assign(const char *s, int cf) |
1172 | { |
1173 | const char *cp; |
1174 | struct var *vp; |
1175 | |
1176 | DBGPRINTF7(("ASSIGN: enter, s=%s, cf=%d\n", s, cf)); |
1177 | |
1178 | if (!isalpha(*s) && *s != '_') |
1179 | return 0; |
1180 | for (cp = s; *cp != '='; cp++) |
1181 | if (*cp == '\0' || (!isalnum(*cp) && *cp != '_')) |
1182 | return 0; |
1183 | vp = lookup(s); |
1184 | nameval(vp, ++cp, cf == COPYV ? NULL : s); |
1185 | if (cf != COPYV) |
1186 | vp->status &= ~GETCELL; |
1187 | return 1; |
1188 | } |
1189 | |
1190 | static int checkname(char *cp) |
1191 | { |
1192 | DBGPRINTF7(("CHECKNAME: enter, cp=%s\n", cp)); |
1193 | |
1194 | if (!isalpha(*cp++) && *(cp - 1) != '_') |
1195 | return 0; |
1196 | while (*cp) |
1197 | if (!isalnum(*cp++) && *(cp - 1) != '_') |
1198 | return 0; |
1199 | return 1; |
1200 | } |
1201 | |
1202 | static void putvlist(int f, int out) |
1203 | { |
1204 | struct var *vp; |
1205 | |
1206 | for (vp = vlist; vp; vp = vp->next) { |
1207 | if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) { |
1208 | if (vp->status & EXPORT) |
1209 | write(out, "export ", 7); |
1210 | if (vp->status & RONLY) |
1211 | write(out, "readonly ", 9); |
1212 | write(out, vp->name, (int) (findeq(vp->name) - vp->name)); |
1213 | write(out, "\n", 1); |
1214 | } |
1215 | } |
1216 | } |
1217 | |
1218 | |
1219 | /* |
1220 | * trap handling |
1221 | */ |
1222 | static void sig(int i) |
1223 | { |
1224 | trapset = i; |
1225 | signal(i, sig); |
1226 | } |
1227 | |
1228 | static void runtrap(int i) |
1229 | { |
1230 | char *trapstr; |
1231 | |
1232 | trapstr = trap[i]; |
1233 | if (trapstr == NULL) |
1234 | return; |
1235 | |
1236 | if (i == 0) |
1237 | trap[i] = NULL; |
1238 | |
1239 | RUN(aword, trapstr, nlchar); |
1240 | } |
1241 | |
1242 | |
1243 | static void setdash(void) |
1244 | { |
1245 | char *cp; |
1246 | int c; |
1247 | char m['z' - 'a' + 1]; |
1248 | |
1249 | cp = m; |
1250 | for (c = 'a'; c <= 'z'; c++) |
1251 | if (FLAG[c]) |
1252 | *cp++ = c; |
1253 | *cp = '\0'; |
1254 | setval(lookup("-"), m); |
1255 | } |
1256 | |
1257 | static int newfile(char *s) |
1258 | { |
1259 | int f; |
1260 | |
1261 | DBGPRINTF7(("NEWFILE: opening %s\n", s)); |
1262 | |
1263 | f = 0; |
1264 | if (NOT_LONE_DASH(s)) { |
1265 | DBGPRINTF(("NEWFILE: s is %s\n", s)); |
1266 | f = open(s, O_RDONLY); |
1267 | if (f < 0) { |
1268 | prs(s); |
1269 | err(": can't open"); |
1270 | return 1; |
1271 | } |
1272 | } |
1273 | |
1274 | next(remap(f)); |
1275 | return 0; |
1276 | } |
1277 | |
1278 | |
1279 | #ifdef UNUSED |
1280 | struct op *scantree(struct op *head) |
1281 | { |
1282 | struct op *dotnode; |
1283 | |
1284 | if (head == NULL) |
1285 | return NULL; |
1286 | |
1287 | if (head->left != NULL) { |
1288 | dotnode = scantree(head->left); |
1289 | if (dotnode) |
1290 | return dotnode; |
1291 | } |
1292 | |
1293 | if (head->right != NULL) { |
1294 | dotnode = scantree(head->right); |
1295 | if (dotnode) |
1296 | return dotnode; |
1297 | } |
1298 | |
1299 | if (head->op_words == NULL) |
1300 | return NULL; |
1301 | |
1302 | DBGPRINTF5(("SCANTREE: checking node %p\n", head)); |
1303 | |
1304 | if ((head->op_type != TDOT) && LONE_CHAR(head->op_words[0], '.')) { |
1305 | DBGPRINTF5(("SCANTREE: dot found in node %p\n", head)); |
1306 | return head; |
1307 | } |
1308 | |
1309 | return NULL; |
1310 | } |
1311 | #endif |
1312 | |
1313 | |
1314 | static void onecommand(void) |
1315 | { |
1316 | int i; |
1317 | jmp_buf m1; |
1318 | |
1319 | DBGPRINTF(("ONECOMMAND: enter, outtree=%p\n", outtree)); |
1320 | |
1321 | while (global_env.oenv) |
1322 | quitenv(); |
1323 | |
1324 | areanum = 1; |
1325 | freehere(areanum); |
1326 | freearea(areanum); |
1327 | garbage(); |
1328 | wdlist = NULL; |
1329 | iolist = NULL; |
1330 | global_env.errpt = NULL; |
1331 | global_env.linep = line; |
1332 | yynerrs = 0; |
1333 | multiline = 0; |
1334 | inparse = 1; |
1335 | intr = 0; |
1336 | execflg = 0; |
1337 | |
1338 | failpt = m1; |
1339 | setjmp(failpt); /* Bruce Evans' fix */ |
1340 | failpt = m1; |
1341 | if (setjmp(failpt) || yyparse() || intr) { |
1342 | DBGPRINTF(("ONECOMMAND: this is not good.\n")); |
1343 | |
1344 | while (global_env.oenv) |
1345 | quitenv(); |
1346 | scraphere(); |
1347 | if (!interactive && intr) |
1348 | leave(); |
1349 | inparse = 0; |
1350 | intr = 0; |
1351 | return; |
1352 | } |
1353 | |
1354 | inparse = 0; |
1355 | brklist = 0; |
1356 | intr = 0; |
1357 | execflg = 0; |
1358 | |
1359 | if (!FLAG['n']) { |
1360 | DBGPRINTF(("ONECOMMAND: calling execute, t=outtree=%p\n", |
1361 | outtree)); |
1362 | execute(outtree, NOPIPE, NOPIPE, /* no_fork: */ 0); |
1363 | } |
1364 | |
1365 | if (!interactive && intr) { |
1366 | execflg = 0; |
1367 | leave(); |
1368 | } |
1369 | |
1370 | i = trapset; |
1371 | if (i != 0) { |
1372 | trapset = 0; |
1373 | runtrap(i); |
1374 | } |
1375 | } |
1376 | |
1377 | static int newenv(int f) |
1378 | { |
1379 | struct env *ep; |
1380 | |
1381 | DBGPRINTF(("NEWENV: f=%d (indicates quitenv and return)\n", f)); |
1382 | |
1383 | if (f) { |
1384 | quitenv(); |
1385 | return 1; |
1386 | } |
1387 | |
1388 | ep = get_space(sizeof(*ep)); |
1389 | if (ep == NULL) { |
1390 | while (global_env.oenv) |
1391 | quitenv(); |
1392 | fail(); |
1393 | } |
1394 | *ep = global_env; |
1395 | global_env.oenv = ep; |
1396 | global_env.errpt = errpt; |
1397 | |
1398 | return 0; |
1399 | } |
1400 | |
1401 | static void quitenv(void) |
1402 | { |
1403 | struct env *ep; |
1404 | int fd; |
1405 | |
1406 | DBGPRINTF(("QUITENV: global_env.oenv=%p\n", global_env.oenv)); |
1407 | |
1408 | ep = global_env.oenv; |
1409 | if (ep != NULL) { |
1410 | fd = global_env.iofd; |
1411 | global_env = *ep; |
1412 | /* should close `'d files */ |
1413 | DELETE(ep); |
1414 | while (--fd >= global_env.iofd) |
1415 | close(fd); |
1416 | } |
1417 | } |
1418 | |
1419 | /* |
1420 | * Is character c in s? |
1421 | */ |
1422 | static int any(int c, const char *s) |
1423 | { |
1424 | while (*s) |
1425 | if (*s++ == c) |
1426 | return 1; |
1427 | return 0; |
1428 | } |
1429 | |
1430 | /* |
1431 | * Is any character from s1 in s2? |
1432 | */ |
1433 | static int anys(const char *s1, const char *s2) |
1434 | { |
1435 | while (*s1) |
1436 | if (any(*s1++, s2)) |
1437 | return 1; |
1438 | return 0; |
1439 | } |
1440 | |
1441 | static char *putn(int n) |
1442 | { |
1443 | return itoa(n); |
1444 | } |
1445 | |
1446 | static void next(int f) |
1447 | { |
1448 | PUSHIO(afile, f, filechar); |
1449 | } |
1450 | |
1451 | static void onintr(int s UNUSED_PARAM) /* ANSI C requires a parameter */ |
1452 | { |
1453 | signal(SIGINT, onintr); |
1454 | intr = 1; |
1455 | if (interactive) { |
1456 | if (inparse) { |
1457 | prs("\n"); |
1458 | fail(); |
1459 | } |
1460 | } else if (heedint) { |
1461 | execflg = 0; |
1462 | leave(); |
1463 | } |
1464 | } |
1465 | |
1466 | |
1467 | /* -------- gmatch.c -------- */ |
1468 | /* |
1469 | * int gmatch(string, pattern) |
1470 | * char *string, *pattern; |
1471 | * |
1472 | * Match a pattern as in sh(1). |
1473 | */ |
1474 | |
1475 | #define CMASK 0377 |
1476 | #define QUOTE 0200 |
1477 | #define QMASK (CMASK & ~QUOTE) |
1478 | #define NOT '!' /* might use ^ */ |
1479 | |
1480 | static const char *cclass(const char *p, int sub) |
1481 | { |
1482 | int c, d, not, found; |
1483 | |
1484 | not = (*p == NOT); |
1485 | if (not != 0) |
1486 | p++; |
1487 | found = not; |
1488 | do { |
1489 | if (*p == '\0') |
1490 | return NULL; |
1491 | c = *p & CMASK; |
1492 | if (p[1] == '-' && p[2] != ']') { |
1493 | d = p[2] & CMASK; |
1494 | p++; |
1495 | } else |
1496 | d = c; |
1497 | if (c == sub || (c <= sub && sub <= d)) |
1498 | found = !not; |
1499 | } while (*++p != ']'); |
1500 | return found ? p + 1 : NULL; |
1501 | } |
1502 | |
1503 | static int gmatch(const char *s, const char *p) |
1504 | { |
1505 | int sc, pc; |
1506 | |
1507 | if (s == NULL || p == NULL) |
1508 | return 0; |
1509 | |
1510 | while ((pc = *p++ & CMASK) != '\0') { |
1511 | sc = *s++ & QMASK; |
1512 | switch (pc) { |
1513 | case '[': |
1514 | p = cclass(p, sc); |
1515 | if (p == NULL) |
1516 | return 0; |
1517 | break; |
1518 | |
1519 | case '?': |
1520 | if (sc == 0) |
1521 | return 0; |
1522 | break; |
1523 | |
1524 | case '*': |
1525 | s--; |
1526 | do { |
1527 | if (*p == '\0' || gmatch(s, p)) |
1528 | return 1; |
1529 | } while (*s++ != '\0'); |
1530 | return 0; |
1531 | |
1532 | default: |
1533 | if (sc != (pc & ~QUOTE)) |
1534 | return 0; |
1535 | } |
1536 | } |
1537 | return *s == '\0'; |
1538 | } |
1539 | |
1540 | |
1541 | /* -------- csyn.c -------- */ |
1542 | /* |
1543 | * shell: syntax (C version) |
1544 | */ |
1545 | |
1546 | static void yyerror(const char *s) NORETURN; |
1547 | static void yyerror(const char *s) |
1548 | { |
1549 | yynerrs = 1; |
1550 | if (interactive && global_env.iop <= iostack) { |
1551 | multiline = 0; |
1552 | while (eofc() == 0 && yylex(0) != '\n') |
1553 | continue; |
1554 | } |
1555 | err(s); |
1556 | fail(); |
1557 | } |
1558 | |
1559 | static void zzerr(void) NORETURN; |
1560 | static void zzerr(void) |
1561 | { |
1562 | yyerror("syntax error"); |
1563 | } |
1564 | |
1565 | int yyparse(void) |
1566 | { |
1567 | DBGPRINTF7(("YYPARSE: enter...\n")); |
1568 | |
1569 | startl = 1; |
1570 | peeksym = 0; |
1571 | yynerrs = 0; |
1572 | outtree = c_list(); |
1573 | musthave('\n', 0); |
1574 | return yynerrs; /* 0/1 */ |
1575 | } |
1576 | |
1577 | static struct op *pipeline(int cf) |
1578 | { |
1579 | struct op *t, *p; |
1580 | int c; |
1581 | |
1582 | DBGPRINTF7(("PIPELINE: enter, cf=%d\n", cf)); |
1583 | |
1584 | t = command(cf); |
1585 | |
1586 | DBGPRINTF9(("PIPELINE: t=%p\n", t)); |
1587 | |
1588 | if (t != NULL) { |
1589 | while ((c = yylex(0)) == '|') { |
1590 | p = command(CONTIN); |
1591 | if (p == NULL) { |
1592 | DBGPRINTF8(("PIPELINE: error!\n")); |
1593 | zzerr(); |
1594 | } |
1595 | |
1596 | if (t->op_type != TPAREN && t->op_type != TCOM) { |
1597 | /* shell statement */ |
1598 | t = block(TPAREN, t, NOBLOCK, NOWORDS); |
1599 | } |
1600 | |
1601 | t = block(TPIPE, t, p, NOWORDS); |
1602 | } |
1603 | peeksym = c; |
1604 | } |
1605 | |
1606 | DBGPRINTF7(("PIPELINE: returning t=%p\n", t)); |
1607 | return t; |
1608 | } |
1609 | |
1610 | static struct op *andor(void) |
1611 | { |
1612 | struct op *t, *p; |
1613 | int c; |
1614 | |
1615 | DBGPRINTF7(("ANDOR: enter...\n")); |
1616 | |
1617 | t = pipeline(0); |
1618 | |
1619 | DBGPRINTF9(("ANDOR: t=%p\n", t)); |
1620 | |
1621 | if (t != NULL) { |
1622 | while ((c = yylex(0)) == LOGAND || c == LOGOR) { |
1623 | p = pipeline(CONTIN); |
1624 | if (p == NULL) { |
1625 | DBGPRINTF8(("ANDOR: error!\n")); |
1626 | zzerr(); |
1627 | } |
1628 | |
1629 | t = block(c == LOGAND ? TAND : TOR, t, p, NOWORDS); |
1630 | } |
1631 | |
1632 | peeksym = c; |
1633 | } |
1634 | |
1635 | DBGPRINTF7(("ANDOR: returning t=%p\n", t)); |
1636 | return t; |
1637 | } |
1638 | |
1639 | static struct op *c_list(void) |
1640 | { |
1641 | struct op *t, *p; |
1642 | int c; |
1643 | |
1644 | DBGPRINTF7(("C_LIST: enter...\n")); |
1645 | |
1646 | t = andor(); |
1647 | |
1648 | if (t != NULL) { |
1649 | peeksym = yylex(0); |
1650 | if (peeksym == '&') |
1651 | t = block(TASYNC, t, NOBLOCK, NOWORDS); |
1652 | |
1653 | while ((c = yylex(0)) == ';' || c == '&' |
1654 | || (multiline && c == '\n') |
1655 | ) { |
1656 | p = andor(); |
1657 | if (p== NULL) |
1658 | return t; |
1659 | |
1660 | peeksym = yylex(0); |
1661 | if (peeksym == '&') |
1662 | p = block(TASYNC, p, NOBLOCK, NOWORDS); |
1663 | |
1664 | t = list(t, p); |
1665 | } /* WHILE */ |
1666 | |
1667 | peeksym = c; |
1668 | } |
1669 | /* IF */ |
1670 | DBGPRINTF7(("C_LIST: returning t=%p\n", t)); |
1671 | return t; |
1672 | } |
1673 | |
1674 | static int synio(int cf) |
1675 | { |
1676 | struct ioword *iop; |
1677 | int i; |
1678 | int c; |
1679 | |
1680 | DBGPRINTF7(("SYNIO: enter, cf=%d\n", cf)); |
1681 | |
1682 | c = yylex(cf); |
1683 | if (c != '<' && c != '>') { |
1684 | peeksym = c; |
1685 | return 0; |
1686 | } |
1687 | |
1688 | i = yylval.i; |
1689 | musthave(WORD, 0); |
1690 | iop = io(iounit, i, yylval.cp); |
1691 | iounit = IODEFAULT; |
1692 | |
1693 | if (i & IOHERE) |
1694 | markhere(yylval.cp, iop); |
1695 | |
1696 | DBGPRINTF7(("SYNIO: returning 1\n")); |
1697 | return 1; |
1698 | } |
1699 | |
1700 | static void musthave(int c, int cf) |
1701 | { |
1702 | peeksym = yylex(cf); |
1703 | if (peeksym != c) { |
1704 | DBGPRINTF7(("MUSTHAVE: error!\n")); |
1705 | zzerr(); |
1706 | } |
1707 | |
1708 | peeksym = 0; |
1709 | } |
1710 | |
1711 | static struct op *simple(void) |
1712 | { |
1713 | struct op *t; |
1714 | |
1715 | t = NULL; |
1716 | for (;;) { |
1717 | switch (peeksym = yylex(0)) { |
1718 | case '<': |
1719 | case '>': |
1720 | (void) synio(0); |
1721 | break; |
1722 | |
1723 | case WORD: |
1724 | if (t == NULL) { |
1725 | t = newtp(); |
1726 | t->op_type = TCOM; |
1727 | } |
1728 | peeksym = 0; |
1729 | word(yylval.cp); |
1730 | break; |
1731 | |
1732 | default: |
1733 | return t; |
1734 | } |
1735 | } |
1736 | } |
1737 | |
1738 | static struct op *nested(int type, int mark) |
1739 | { |
1740 | struct op *t; |
1741 | |
1742 | DBGPRINTF3(("NESTED: enter, type=%d, mark=%d\n", type, mark)); |
1743 | |
1744 | multiline++; |
1745 | t = c_list(); |
1746 | musthave(mark, 0); |
1747 | multiline--; |
1748 | return block(type, t, NOBLOCK, NOWORDS); |
1749 | } |
1750 | |
1751 | static struct op *command(int cf) |
1752 | { |
1753 | struct op *t; |
1754 | struct wdblock *iosave; |
1755 | int c; |
1756 | |
1757 | DBGPRINTF(("COMMAND: enter, cf=%d\n", cf)); |
1758 | |
1759 | iosave = iolist; |
1760 | iolist = NULL; |
1761 | |
1762 | if (multiline) |
1763 | cf |= CONTIN; |
1764 | |
1765 | while (synio(cf)) |
1766 | cf = 0; |
1767 | |
1768 | c = yylex(cf); |
1769 | |
1770 | switch (c) { |
1771 | default: |
1772 | peeksym = c; |
1773 | t = simple(); |
1774 | if (t == NULL) { |
1775 | if (iolist == NULL) |
1776 | return NULL; |
1777 | t = newtp(); |
1778 | t->op_type = TCOM; |
1779 | } |
1780 | break; |
1781 | |
1782 | case '(': |
1783 | t = nested(TPAREN, ')'); |
1784 | break; |
1785 | |
1786 | case '{': |
1787 | t = nested(TBRACE, '}'); |
1788 | break; |
1789 | |
1790 | case FOR: |
1791 | t = newtp(); |
1792 | t->op_type = TFOR; |
1793 | musthave(WORD, 0); |
1794 | startl = 1; |
1795 | t->str = yylval.cp; |
1796 | multiline++; |
1797 | t->op_words = wordlist(); |
1798 | c = yylex(0); |
1799 | if (c != '\n' && c != ';') |
1800 | peeksym = c; |
1801 | t->left = dogroup(0); |
1802 | multiline--; |
1803 | break; |
1804 | |
1805 | case WHILE: |
1806 | case UNTIL: |
1807 | multiline++; |
1808 | t = newtp(); |
1809 | t->op_type = (c == WHILE ? TWHILE : TUNTIL); |
1810 | t->left = c_list(); |
1811 | t->right = dogroup(1); |
1812 | /* t->op_words = NULL; - newtp() did this */ |
1813 | multiline--; |
1814 | break; |
1815 | |
1816 | case CASE: |
1817 | t = newtp(); |
1818 | t->op_type = TCASE; |
1819 | musthave(WORD, 0); |
1820 | t->str = yylval.cp; |
1821 | startl++; |
1822 | multiline++; |
1823 | musthave(IN, CONTIN); |
1824 | startl++; |
1825 | |
1826 | t->left = caselist(); |
1827 | |
1828 | musthave(ESAC, 0); |
1829 | multiline--; |
1830 | break; |
1831 | |
1832 | case IF: |
1833 | multiline++; |
1834 | t = newtp(); |
1835 | t->op_type = TIF; |
1836 | t->left = c_list(); |
1837 | t->right = thenpart(); |
1838 | musthave(FI, 0); |
1839 | multiline--; |
1840 | break; |
1841 | |
1842 | case DOT: |
1843 | t = newtp(); |
1844 | t->op_type = TDOT; |
1845 | |
1846 | musthave(WORD, 0); /* gets name of file */ |
1847 | DBGPRINTF7(("COMMAND: DOT clause, yylval.cp is %s\n", yylval.cp)); |
1848 | |
1849 | word(yylval.cp); /* add word to wdlist */ |
1850 | word(NOWORD); /* terminate wdlist */ |
1851 | t->op_words = copyw(); /* dup wdlist */ |
1852 | break; |
1853 | |
1854 | } |
1855 | |
1856 | while (synio(0)) |
1857 | continue; |
1858 | |
1859 | t = namelist(t); |
1860 | iolist = iosave; |
1861 | |
1862 | DBGPRINTF(("COMMAND: returning %p\n", t)); |
1863 | |
1864 | return t; |
1865 | } |
1866 | |
1867 | static struct op *dowholefile(int type /*, int mark*/) |
1868 | { |
1869 | struct op *t; |
1870 | |
1871 | DBGPRINTF(("DOWHOLEFILE: enter, type=%d\n", type /*, mark*/)); |
1872 | |
1873 | multiline++; |
1874 | t = c_list(); |
1875 | multiline--; |
1876 | t = block(type, t, NOBLOCK, NOWORDS); |
1877 | DBGPRINTF(("DOWHOLEFILE: return t=%p\n", t)); |
1878 | return t; |
1879 | } |
1880 | |
1881 | static struct op *dogroup(int onlydone) |
1882 | { |
1883 | int c; |
1884 | struct op *mylist; |
1885 | |
1886 | c = yylex(CONTIN); |
1887 | if (c == DONE && onlydone) |
1888 | return NULL; |
1889 | if (c != DO) |
1890 | zzerr(); |
1891 | mylist = c_list(); |
1892 | musthave(DONE, 0); |
1893 | return mylist; |
1894 | } |
1895 | |
1896 | static struct op *thenpart(void) |
1897 | { |
1898 | int c; |
1899 | struct op *t; |
1900 | |
1901 | c = yylex(0); |
1902 | if (c != THEN) { |
1903 | peeksym = c; |
1904 | return NULL; |
1905 | } |
1906 | t = newtp(); |
1907 | /*t->op_type = 0; - newtp() did this */ |
1908 | t->left = c_list(); |
1909 | if (t->left == NULL) |
1910 | zzerr(); |
1911 | t->right = elsepart(); |
1912 | return t; |
1913 | } |
1914 | |
1915 | static struct op *elsepart(void) |
1916 | { |
1917 | int c; |
1918 | struct op *t; |
1919 | |
1920 | switch (c = yylex(0)) { |
1921 | case ELSE: |
1922 | t = c_list(); |
1923 | if (t == NULL) |
1924 | zzerr(); |
1925 | return t; |
1926 | |
1927 | case ELIF: |
1928 | t = newtp(); |
1929 | t->op_type = TELIF; |
1930 | t->left = c_list(); |
1931 | t->right = thenpart(); |
1932 | return t; |
1933 | |
1934 | default: |
1935 | peeksym = c; |
1936 | return NULL; |
1937 | } |
1938 | } |
1939 | |
1940 | static struct op *caselist(void) |
1941 | { |
1942 | struct op *t; |
1943 | |
1944 | t = NULL; |
1945 | while ((peeksym = yylex(CONTIN)) != ESAC) { |
1946 | DBGPRINTF(("CASELIST, doing yylex, peeksym=%d\n", peeksym)); |
1947 | t = list(t, casepart()); |
1948 | } |
1949 | |
1950 | DBGPRINTF(("CASELIST, returning t=%p\n", t)); |
1951 | return t; |
1952 | } |
1953 | |
1954 | static struct op *casepart(void) |
1955 | { |
1956 | struct op *t; |
1957 | |
1958 | DBGPRINTF7(("CASEPART: enter...\n")); |
1959 | |
1960 | t = newtp(); |
1961 | t->op_type = TPAT; |
1962 | t->op_words = pattern(); |
1963 | musthave(')', 0); |
1964 | t->left = c_list(); |
1965 | peeksym = yylex(CONTIN); |
1966 | if (peeksym != ESAC) |
1967 | musthave(BREAK, CONTIN); |
1968 | |
1969 | DBGPRINTF7(("CASEPART: made newtp(TPAT, t=%p)\n", t)); |
1970 | |
1971 | return t; |
1972 | } |
1973 | |
1974 | static char **pattern(void) |
1975 | { |
1976 | int c, cf; |
1977 | |
1978 | cf = CONTIN; |
1979 | do { |
1980 | musthave(WORD, cf); |
1981 | word(yylval.cp); |
1982 | cf = 0; |
1983 | c = yylex(0); |
1984 | } while (c == '|'); |
1985 | peeksym = c; |
1986 | word(NOWORD); |
1987 | |
1988 | return copyw(); |
1989 | } |
1990 | |
1991 | static char **wordlist(void) |
1992 | { |
1993 | int c; |
1994 | |
1995 | c = yylex(0); |
1996 | if (c != IN) { |
1997 | peeksym = c; |
1998 | return NULL; |
1999 | } |
2000 | startl = 0; |
2001 | while ((c = yylex(0)) == WORD) |
2002 | word(yylval.cp); |
2003 | word(NOWORD); |
2004 | peeksym = c; |
2005 | return copyw(); |
2006 | } |
2007 | |
2008 | /* |
2009 | * supporting functions |
2010 | */ |
2011 | static struct op *list(struct op *t1, struct op *t2) |
2012 | { |
2013 | DBGPRINTF7(("LIST: enter, t1=%p, t2=%p\n", t1, t2)); |
2014 | |
2015 | if (t1 == NULL) |
2016 | return t2; |
2017 | if (t2 == NULL) |
2018 | return t1; |
2019 | |
2020 | return block(TLIST, t1, t2, NOWORDS); |
2021 | } |
2022 | |
2023 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp) |
2024 | { |
2025 | struct op *t; |
2026 | |
2027 | DBGPRINTF7(("BLOCK: enter, type=%d (%s)\n", type, T_CMD_NAMES[type])); |
2028 | |
2029 | t = newtp(); |
2030 | t->op_type = type; |
2031 | t->left = t1; |
2032 | t->right = t2; |
2033 | t->op_words = wp; |
2034 | |
2035 | DBGPRINTF7(("BLOCK: inserted %p between %p and %p\n", t, t1, t2)); |
2036 | |
2037 | return t; |
2038 | } |
2039 | |
2040 | /* See if given string is a shell multiline (FOR, IF, etc) */ |
2041 | static int rlookup(char *n) |
2042 | { |
2043 | struct res { |
2044 | char r_name[6]; |
2045 | int16_t r_val; |
2046 | }; |
2047 | static const struct res restab[] = { |
2048 | { "for" , FOR }, |
2049 | { "case" , CASE }, |
2050 | { "esac" , ESAC }, |
2051 | { "while", WHILE }, |
2052 | { "do" , DO }, |
2053 | { "done" , DONE }, |
2054 | { "if" , IF }, |
2055 | { "in" , IN }, |
2056 | { "then" , THEN }, |
2057 | { "else" , ELSE }, |
2058 | { "elif" , ELIF }, |
2059 | { "until", UNTIL }, |
2060 | { "fi" , FI }, |
2061 | { ";;" , BREAK }, |
2062 | { "||" , LOGOR }, |
2063 | { "&&" , LOGAND }, |
2064 | { "{" , '{' }, |
2065 | { "}" , '}' }, |
2066 | { "." , DOT }, |
2067 | { "" , 0 }, |
2068 | }; |
2069 | |
2070 | const struct res *rp; |
2071 | |
2072 | DBGPRINTF7(("RLOOKUP: enter, n is %s\n", n)); |
2073 | |
2074 | for (rp = restab; rp->r_name[0]; rp++) |
2075 | if (strcmp(rp->r_name, n) == 0) { |
2076 | DBGPRINTF7(("RLOOKUP: match, returning %d\n", rp->r_val)); |
2077 | return rp->r_val; /* Return numeric code for shell multiline */ |
2078 | } |
2079 | |
2080 | DBGPRINTF7(("RLOOKUP: NO match, returning 0\n")); |
2081 | return 0; /* Not a shell multiline */ |
2082 | } |
2083 | |
2084 | static struct op *newtp(void) |
2085 | { |
2086 | struct op *t; |
2087 | |
2088 | t = (struct op *) tree(sizeof(*t)); |
2089 | memset(t, 0, sizeof(*t)); |
2090 | |
2091 | DBGPRINTF3(("NEWTP: allocated %p\n", t)); |
2092 | |
2093 | return t; |
2094 | } |
2095 | |
2096 | static struct op *namelist(struct op *t) |
2097 | { |
2098 | DBGPRINTF7(("NAMELIST: enter, t=%p, type %s, iolist=%p\n", t, |
2099 | T_CMD_NAMES[t->op_type], iolist)); |
2100 | |
2101 | if (iolist) { |
2102 | iolist = addword((char *) NULL, iolist); |
2103 | t->ioact = copyio(); |
2104 | } else |
2105 | t->ioact = NULL; |
2106 | |
2107 | if (t->op_type != TCOM) { |
2108 | if (t->op_type != TPAREN && t->ioact != NULL) { |
2109 | t = block(TPAREN, t, NOBLOCK, NOWORDS); |
2110 | t->ioact = t->left->ioact; |
2111 | t->left->ioact = NULL; |
2112 | } |
2113 | return t; |
2114 | } |
2115 | |
2116 | word(NOWORD); |
2117 | t->op_words = copyw(); |
2118 | |
2119 | return t; |
2120 | } |
2121 | |
2122 | static char **copyw(void) |
2123 | { |
2124 | char **wd; |
2125 | |
2126 | wd = getwords(wdlist); |
2127 | wdlist = NULL; |
2128 | return wd; |
2129 | } |
2130 | |
2131 | static void word(char *cp) |
2132 | { |
2133 | wdlist = addword(cp, wdlist); |
2134 | } |
2135 | |
2136 | static struct ioword **copyio(void) |
2137 | { |
2138 | struct ioword **iop; |
2139 | |
2140 | iop = (struct ioword **) getwords(iolist); |
2141 | iolist = NULL; |
2142 | return iop; |
2143 | } |
2144 | |
2145 | static struct ioword *io(int u, int f, char *cp) |
2146 | { |
2147 | struct ioword *iop; |
2148 | |
2149 | iop = (struct ioword *) tree(sizeof(*iop)); |
2150 | iop->io_fd = u; |
2151 | iop->io_flag = f; |
2152 | iop->io_name = cp; |
2153 | iolist = addword((char *) iop, iolist); |
2154 | return iop; |
2155 | } |
2156 | |
2157 | static int yylex(int cf) |
2158 | { |
2159 | int c, c1; |
2160 | int atstart; |
2161 | |
2162 | c = peeksym; |
2163 | if (c > 0) { |
2164 | peeksym = 0; |
2165 | if (c == '\n') |
2166 | startl = 1; |
2167 | return c; |
2168 | } |
2169 | |
2170 | nlseen = 0; |
2171 | atstart = startl; |
2172 | startl = 0; |
2173 | yylval.i = 0; |
2174 | global_env.linep = line; |
2175 | |
2176 | /* MALAMO */ |
2177 | line[LINELIM - 1] = '\0'; |
2178 | |
2179 | loop: |
2180 | while ((c = my_getc(0)) == ' ' || c == '\t') /* Skip whitespace */ |
2181 | continue; |
2182 | |
2183 | switch (c) { |
2184 | default: |
2185 | if (any(c, "0123456789")) { |
2186 | c1 = my_getc(0); |
2187 | unget(c1); |
2188 | if (c1 == '<' || c1 == '>') { |
2189 | iounit = c - '0'; |
2190 | goto loop; |
2191 | } |
2192 | *global_env.linep++ = c; |
2193 | c = c1; |
2194 | } |
2195 | break; |
2196 | |
2197 | case '#': /* Comment, skip to next newline or End-of-string */ |
2198 | while ((c = my_getc(0)) != '\0' && c != '\n') |
2199 | continue; |
2200 | unget(c); |
2201 | goto loop; |
2202 | |
2203 | case 0: |
2204 | DBGPRINTF5(("YYLEX: return 0, c=%d\n", c)); |
2205 | return c; |
2206 | |
2207 | case '$': |
2208 | DBGPRINTF9(("YYLEX: found $\n")); |
2209 | *global_env.linep++ = c; |
2210 | c = my_getc(0); |
2211 | if (c == '{') { |
2212 | c = collect(c, '}'); |
2213 | if (c != '\0') |
2214 | return c; |
2215 | goto pack; |
2216 | } |
2217 | break; |
2218 | |
2219 | case '`': |
2220 | case '\'': |
2221 | case '"': |
2222 | c = collect(c, c); |
2223 | if (c != '\0') |
2224 | return c; |
2225 | goto pack; |
2226 | |
2227 | case '|': |
2228 | case '&': |
2229 | case ';': |
2230 | startl = 1; |
2231 | /* If more chars process them, else return NULL char */ |
2232 | c1 = dual(c); |
2233 | if (c1 != '\0') |
2234 | return c1; |
2235 | return c; |
2236 | |
2237 | case '^': |
2238 | startl = 1; |
2239 | return '|'; |
2240 | case '>': |
2241 | case '<': |
2242 | diag(c); |
2243 | return c; |
2244 | |
2245 | case '\n': |
2246 | nlseen++; |
2247 | gethere(); |
2248 | startl = 1; |
2249 | if (multiline || cf & CONTIN) { |
2250 | if (interactive && global_env.iop <= iostack) { |
2251 | #if ENABLE_FEATURE_EDITING |
2252 | current_prompt = cprompt->value; |
2253 | #else |
2254 | prs(cprompt->value); |
2255 | #endif |
2256 | } |
2257 | if (cf & CONTIN) |
2258 | goto loop; |
2259 | } |
2260 | return c; |
2261 | |
2262 | case '(': |
2263 | case ')': |
2264 | startl = 1; |
2265 | return c; |
2266 | } |
2267 | |
2268 | unget(c); |
2269 | |
2270 | pack: |
2271 | while ((c = my_getc(0)) != '\0' && !any(c, "`$ '\"\t;&<>()|^\n")) { |
2272 | if (global_env.linep >= elinep) |
2273 | err("word too long"); |
2274 | else |
2275 | *global_env.linep++ = c; |
2276 | }; |
2277 | |
2278 | unget(c); |
2279 | |
2280 | if (any(c, "\"'`$")) |
2281 | goto loop; |
2282 | |
2283 | *global_env.linep++ = '\0'; |
2284 | |
2285 | if (atstart) { |
2286 | c = rlookup(line); |
2287 | if (c != 0) { |
2288 | startl = 1; |
2289 | return c; |
2290 | } |
2291 | } |
2292 | |
2293 | yylval.cp = strsave(line, areanum); |
2294 | return WORD; |
2295 | } |
2296 | |
2297 | |
2298 | static int collect(int c, int c1) |
2299 | { |
2300 | char s[2]; |
2301 | |
2302 | DBGPRINTF8(("COLLECT: enter, c=%d, c1=%d\n", c, c1)); |
2303 | |
2304 | *global_env.linep++ = c; |
2305 | while ((c = my_getc(c1)) != c1) { |
2306 | if (c == 0) { |
2307 | unget(c); |
2308 | s[0] = c1; |
2309 | s[1] = 0; |
2310 | prs("no closing "); |
2311 | yyerror(s); |
2312 | return YYERRCODE; |
2313 | } |
2314 | if (interactive && c == '\n' && global_env.iop <= iostack) { |
2315 | #if ENABLE_FEATURE_EDITING |
2316 | current_prompt = cprompt->value; |
2317 | #else |
2318 | prs(cprompt->value); |
2319 | #endif |
2320 | } |
2321 | *global_env.linep++ = c; |
2322 | } |
2323 | |
2324 | *global_env.linep++ = c; |
2325 | |
2326 | DBGPRINTF8(("COLLECT: return 0, line is %s\n", line)); |
2327 | |
2328 | return 0; |
2329 | } |
2330 | |
2331 | /* "multiline commands" helper func */ |
2332 | /* see if next 2 chars form a shell multiline */ |
2333 | static int dual(int c) |
2334 | { |
2335 | char s[3]; |
2336 | char *cp = s; |
2337 | |
2338 | DBGPRINTF8(("DUAL: enter, c=%d\n", c)); |
2339 | |
2340 | *cp++ = c; /* c is the given "peek" char */ |
2341 | *cp++ = my_getc(0); /* get next char of input */ |
2342 | *cp = '\0'; /* add EOS marker */ |
2343 | |
2344 | c = rlookup(s); /* see if 2 chars form a shell multiline */ |
2345 | if (c == 0) |
2346 | unget(*--cp); /* String is not a shell multiline, put peek char back */ |
2347 | |
2348 | return c; /* String is multiline, return numeric multiline (restab) code */ |
2349 | } |
2350 | |
2351 | static void diag(int ec) |
2352 | { |
2353 | int c; |
2354 | |
2355 | DBGPRINTF8(("DIAG: enter, ec=%d\n", ec)); |
2356 | |
2357 | c = my_getc(0); |
2358 | if (c == '>' || c == '<') { |
2359 | if (c != ec) |
2360 | zzerr(); |
2361 | yylval.i = (ec == '>' ? IOWRITE | IOCAT : IOHERE); |
2362 | c = my_getc(0); |
2363 | } else |
2364 | yylval.i = (ec == '>' ? IOWRITE : IOREAD); |
2365 | if (c != '&' || yylval.i == IOHERE) |
2366 | unget(c); |
2367 | else |
2368 | yylval.i |= IODUP; |
2369 | } |
2370 | |
2371 | static char *tree(unsigned size) |
2372 | { |
2373 | char *t; |
2374 | |
2375 | t = getcell(size); |
2376 | if (t == NULL) { |
2377 | DBGPRINTF2(("TREE: getcell(%d) failed!\n", size)); |
2378 | prs("command line too complicated\n"); |
2379 | fail(); |
2380 | /* NOTREACHED */ |
2381 | } |
2382 | return t; |
2383 | } |
2384 | |
2385 | |
2386 | /* VARARGS1 */ |
2387 | /* ARGSUSED */ |
2388 | |
2389 | /* -------- exec.c -------- */ |
2390 | |
2391 | static struct op **find1case(struct op *t, const char *w) |
2392 | { |
2393 | struct op *t1; |
2394 | struct op **tp; |
2395 | char **wp; |
2396 | char *cp; |
2397 | |
2398 | if (t == NULL) { |
2399 | DBGPRINTF3(("FIND1CASE: enter, t==NULL, returning.\n")); |
2400 | return NULL; |
2401 | } |
2402 | |
2403 | DBGPRINTF3(("FIND1CASE: enter, t->op_type=%d (%s)\n", t->op_type, |
2404 | T_CMD_NAMES[t->op_type])); |
2405 | |
2406 | if (t->op_type == TLIST) { |
2407 | tp = find1case(t->left, w); |
2408 | if (tp != NULL) { |
2409 | DBGPRINTF3(("FIND1CASE: found one to the left, returning tp=%p\n", tp)); |
2410 | return tp; |
2411 | } |
2412 | t1 = t->right; /* TPAT */ |
2413 | } else |
2414 | t1 = t; |
2415 | |
2416 | for (wp = t1->op_words; *wp;) { |
2417 | cp = evalstr(*wp++, DOSUB); |
2418 | if (cp && gmatch(w, cp)) { |
2419 | DBGPRINTF3(("FIND1CASE: returning &t1->left= %p.\n", |
2420 | &t1->left)); |
2421 | return &t1->left; |
2422 | } |
2423 | } |
2424 | |
2425 | DBGPRINTF(("FIND1CASE: returning NULL\n")); |
2426 | return NULL; |
2427 | } |
2428 | |
2429 | static struct op *findcase(struct op *t, const char *w) |
2430 | { |
2431 | struct op **tp; |
2432 | |
2433 | tp = find1case(t, w); |
2434 | return tp != NULL ? *tp : NULL; |
2435 | } |
2436 | |
2437 | /* |
2438 | * execute tree |
2439 | */ |
2440 | |
2441 | static int execute(struct op *t, int *pin, int *pout, int no_fork) |
2442 | { |
2443 | struct op *t1; |
2444 | volatile int i, rv, a; |
2445 | const char *cp; |
2446 | char **wp, **wp2; |
2447 | struct var *vp; |
2448 | struct op *outtree_save; |
2449 | struct brkcon bc; |
2450 | |
2451 | #if __GNUC__ |
2452 | /* Avoid longjmp clobbering */ |
2453 | (void) ℘ |
2454 | #endif |
2455 | |
2456 | if (t == NULL) { |
2457 | DBGPRINTF4(("EXECUTE: enter, t==null, returning.\n")); |
2458 | return 0; |
2459 | } |
2460 | |
2461 | DBGPRINTF(("EXECUTE: t=%p, t->op_type=%d (%s), t->op_words is %s\n", t, |
2462 | t->op_type, T_CMD_NAMES[t->op_type], |
2463 | ((t->op_words == NULL) ? "NULL" : t->op_words[0]))); |
2464 | |
2465 | rv = 0; |
2466 | a = areanum++; |
2467 | wp2 = t->op_words; |
2468 | wp = (wp2 != NULL) |
2469 | ? eval(wp2, t->op_type == TCOM ? DOALL : DOALL & ~DOKEY) |
2470 | : NULL; |
2471 | |
2472 | switch (t->op_type) { |
2473 | case TDOT: |
2474 | DBGPRINTF3(("EXECUTE: TDOT\n")); |
2475 | |
2476 | outtree_save = outtree; |
2477 | |
2478 | newfile(evalstr(t->op_words[0], DOALL)); |
2479 | |
2480 | t->left = dowholefile(TLIST /*, 0*/); |
2481 | t->right = NULL; |
2482 | |
2483 | outtree = outtree_save; |
2484 | |
2485 | if (t->left) |
2486 | rv = execute(t->left, pin, pout, /* no_fork: */ 0); |
2487 | if (t->right) |
2488 | rv = execute(t->right, pin, pout, /* no_fork: */ 0); |
2489 | break; |
2490 | |
2491 | case TPAREN: |
2492 | rv = execute(t->left, pin, pout, /* no_fork: */ 0); |
2493 | break; |
2494 | |
2495 | case TCOM: |
2496 | rv = forkexec(t, pin, pout, no_fork, wp); |
2497 | break; |
2498 | |
2499 | case TPIPE: |
2500 | { |
2501 | int pv[2]; |
2502 | |
2503 | rv = openpipe(pv); |
2504 | if (rv < 0) |
2505 | break; |
2506 | pv[0] = remap(pv[0]); |
2507 | pv[1] = remap(pv[1]); |
2508 | (void) execute(t->left, pin, pv, /* no_fork: */ 0); |
2509 | rv = execute(t->right, pv, pout, /* no_fork: */ 0); |
2510 | } |
2511 | break; |
2512 | |
2513 | case TLIST: |
2514 | (void) execute(t->left, pin, pout, /* no_fork: */ 0); |
2515 | rv = execute(t->right, pin, pout, /* no_fork: */ 0); |
2516 | break; |
2517 | |
2518 | case TASYNC: |
2519 | { |
2520 | smallint hinteractive = interactive; |
2521 | |
2522 | DBGPRINTF7(("EXECUTE: TASYNC clause, calling vfork()...\n")); |
2523 | |
2524 | i = vfork(); |
2525 | if (i == 0) { /* child */ |
2526 | signal(SIGINT, SIG_IGN); |
2527 | signal(SIGQUIT, SIG_IGN); |
2528 | if (interactive) |
2529 | signal(SIGTERM, SIG_DFL); |
2530 | interactive = 0; |
2531 | if (pin == NULL) { |
2532 | close(0); |
2533 | xopen(bb_dev_null, O_RDONLY); |
2534 | } |
2535 | _exit(execute(t->left, pin, pout, /* no_fork: */ 1)); |
2536 | } |
2537 | interactive = hinteractive; |
2538 | if (i != -1) { |
2539 | setval(lookup("!"), putn(i)); |
2540 | closepipe(pin); |
2541 | if (interactive) { |
2542 | prs(putn(i)); |
2543 | prs("\n"); |
2544 | } |
2545 | } else |
2546 | rv = -1; |
2547 | setstatus(rv); |
2548 | } |
2549 | break; |
2550 | |
2551 | case TOR: |
2552 | case TAND: |
2553 | rv = execute(t->left, pin, pout, /* no_fork: */ 0); |
2554 | t1 = t->right; |
2555 | if (t1 != NULL && (rv == 0) == (t->op_type == TAND)) |
2556 | rv = execute(t1, pin, pout, /* no_fork: */ 0); |
2557 | break; |
2558 | |
2559 | case TFOR: |
2560 | if (wp == NULL) { |
2561 | wp = dolv + 1; |
2562 | i = dolc; |
2563 | if (i < 0) |
2564 | i = 0; |
2565 | } else { |
2566 | i = -1; |
2567 | while (*wp++ != NULL) |
2568 | continue; |
2569 | } |
2570 | vp = lookup(t->str); |
2571 | while (setjmp(bc.brkpt)) |
2572 | if (isbreak) |
2573 | goto broken; |
2574 | /* Restore areanum value. It may be incremented by execute() |
2575 | * below, and then "continue" may jump back to setjmp above */ |
2576 | areanum = a + 1; |
2577 | freearea(areanum + 1); |
2578 | brkset(&bc); |
2579 | for (t1 = t->left; i-- && *wp != NULL;) { |
2580 | setval(vp, *wp++); |
2581 | rv = execute(t1, pin, pout, /* no_fork: */ 0); |
2582 | } |
2583 | brklist = brklist->nextlev; |
2584 | break; |
2585 | |
2586 | case TWHILE: |
2587 | case TUNTIL: |
2588 | while (setjmp(bc.brkpt)) |
2589 | if (isbreak) |
2590 | goto broken; |
2591 | /* Restore areanum value. It may be incremented by execute() |
2592 | * below, and then "continue" may jump back to setjmp above */ |
2593 | areanum = a + 1; |
2594 | freearea(areanum + 1); |
2595 | brkset(&bc); |
2596 | t1 = t->left; |
2597 | while ((execute(t1, pin, pout, /* no_fork: */ 0) == 0) == (t->op_type == TWHILE)) |
2598 | rv = execute(t->right, pin, pout, /* no_fork: */ 0); |
2599 | brklist = brklist->nextlev; |
2600 | break; |
2601 | |
2602 | case TIF: |
2603 | case TELIF: |
2604 | if (t->right != NULL) { |
2605 | rv = !execute(t->left, pin, pout, /* no_fork: */ 0) ? |
2606 | execute(t->right->left, pin, pout, /* no_fork: */ 0) : |
2607 | execute(t->right->right, pin, pout, /* no_fork: */ 0); |
2608 | } |
2609 | break; |
2610 | |
2611 | case TCASE: |
2612 | cp = evalstr(t->str, DOSUB | DOTRIM); |
2613 | if (cp == NULL) |
2614 | cp = ""; |
2615 | |
2616 | DBGPRINTF7(("EXECUTE: TCASE, t->str is %s, cp is %s\n", |
2617 | ((t->str == NULL) ? "NULL" : t->str), |
2618 | ((cp == NULL) ? "NULL" : cp))); |
2619 | |
2620 | t1 = findcase(t->left, cp); |
2621 | if (t1 != NULL) { |
2622 | DBGPRINTF7(("EXECUTE: TCASE, calling execute(t=%p, t1=%p)...\n", t, t1)); |
2623 | rv = execute(t1, pin, pout, /* no_fork: */ 0); |
2624 | DBGPRINTF7(("EXECUTE: TCASE, back from execute(t=%p, t1=%p)...\n", t, t1)); |
2625 | } |
2626 | break; |
2627 | |
2628 | case TBRACE: |
2629 | /* |
2630 | iopp = t->ioact; |
2631 | if (i) |
2632 | while (*iopp) |
2633 | if (iosetup(*iopp++, pin!=NULL, pout!=NULL)) { |
2634 | rv = -1; |
2635 | break; |
2636 | } |
2637 | */ |
2638 | if (rv >= 0) { |
2639 | t1 = t->left; |
2640 | if (t1) { |
2641 | rv = execute(t1, pin, pout, /* no_fork: */ 0); |
2642 | } |
2643 | } |
2644 | break; |
2645 | |
2646 | }; |
2647 | |
2648 | broken: |
2649 | // Restoring op_words is most likely not needed now: see comment in forkexec() |
2650 | // (also take a look at exec builtin (doexec) - it touches t->op_words) |
2651 | t->op_words = wp2; |
2652 | isbreak = 0; |
2653 | freehere(areanum); |
2654 | freearea(areanum); |
2655 | areanum = a; |
2656 | if (interactive && intr) { |
2657 | closeall(); |
2658 | fail(); |
2659 | } |
2660 | |
2661 | i = trapset; |
2662 | if (i != 0) { |
2663 | trapset = 0; |
2664 | runtrap(i); |
2665 | } |
2666 | |
2667 | DBGPRINTF(("EXECUTE: returning from t=%p, rv=%d\n", t, rv)); |
2668 | return rv; |
2669 | } |
2670 | |
2671 | static builtin_func_ptr inbuilt(const char *s) |
2672 | { |
2673 | const struct builtincmd *bp; |
2674 | |
2675 | for (bp = builtincmds; bp->name; bp++) |
2676 | if (strcmp(bp->name, s) == 0) |
2677 | return bp->builtinfunc; |
2678 | return NULL; |
2679 | } |
2680 | |
2681 | static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp) |
2682 | { |
2683 | pid_t newpid; |
2684 | int i; |
2685 | builtin_func_ptr bltin = NULL; |
2686 | const char *bltin_name = NULL; |
2687 | const char *cp; |
2688 | struct ioword **iopp; |
2689 | int resetsig; |
2690 | char **owp; |
2691 | int forked; |
2692 | |
2693 | int *hpin = pin; |
2694 | int *hpout = pout; |
2695 | char *hwp; |
2696 | smallint hinteractive; |
2697 | smallint hintr; |
2698 | smallint hexecflg; |
2699 | struct brkcon *hbrklist; |
2700 | |
2701 | #if __GNUC__ |
2702 | /* Avoid longjmp clobbering */ |
2703 | (void) &pin; |
2704 | (void) &pout; |
2705 | (void) ℘ |
2706 | (void) &bltin; |
2707 | (void) &cp; |
2708 | (void) &resetsig; |
2709 | (void) &owp; |
2710 | #endif |
2711 | |
2712 | DBGPRINTF(("FORKEXEC: t=%p, pin %p, pout %p, no_fork %d\n", t, pin, |
2713 | pout, no_fork)); |
2714 | DBGPRINTF7(("FORKEXEC: t->op_words is %s\n", |
2715 | ((t->op_words == NULL) ? "NULL" : t->op_words[0]))); |
2716 | owp = wp; |
2717 | resetsig = 0; |
2718 | if (t->op_type == TCOM) { |
2719 | while (*wp++ != NULL) |
2720 | continue; |
2721 | cp = *wp; |
2722 | |
2723 | /* strip all initial assignments */ |
2724 | /* FIXME: not correct wrt PATH=yyy command etc */ |
2725 | if (FLAG['x']) { |
2726 | DBGPRINTF9(("FORKEXEC: echo'ing, cp=%p, wp=%p, owp=%p\n", |
2727 | cp, wp, owp)); |
2728 | echo(cp ? wp : owp); |
2729 | } |
2730 | |
2731 | if (cp == NULL) { |
2732 | if (t->ioact == NULL) { |
2733 | while ((cp = *owp++) != NULL && assign(cp, COPYV)) |
2734 | continue; |
2735 | DBGPRINTF(("FORKEXEC: returning setstatus(0)\n")); |
2736 | return setstatus(0); |
2737 | } |
2738 | } else { /* cp != NULL */ |
2739 | bltin_name = cp; |
2740 | bltin = inbuilt(cp); |
2741 | } |
2742 | } |
2743 | |
2744 | forked = 0; |
2745 | // We were pointing t->op_words to temporary (expanded) arg list: |
2746 | // t->op_words = wp; |
2747 | // and restored it later (in execute()), but "break" |
2748 | // longjmps away (at "Run builtin" below), leaving t->op_words clobbered! |
2749 | // See http://bugs.busybox.net/view.php?id=846. |
2750 | // Now we do not touch t->op_words, but separately pass wp as param list |
2751 | // to builtins |
2752 | DBGPRINTF(("FORKEXEC: bltin %p, no_fork %d, owp %p\n", bltin, |
2753 | no_fork, owp)); |
2754 | /* Don't fork if it is a lone builtin (not in pipe) |
2755 | * OR we are told to _not_ fork */ |
2756 | if ((!bltin || pin || pout) /* not lone bltin AND */ |
2757 | && !no_fork /* not told to avoid fork */ |
2758 | ) { |
2759 | /* Save values in case child alters them after vfork */ |
2760 | hpin = pin; |
2761 | hpout = pout; |
2762 | hwp = *wp; |
2763 | hinteractive = interactive; |
2764 | hintr = intr; |
2765 | hbrklist = brklist; |
2766 | hexecflg = execflg; |
2767 | |
2768 | DBGPRINTF3(("FORKEXEC: calling vfork()...\n")); |
2769 | newpid = vfork(); |
2770 | if (newpid == -1) { |
2771 | DBGPRINTF(("FORKEXEC: ERROR, can't vfork()!\n")); |
2772 | return -1; |
2773 | } |
2774 | |
2775 | if (newpid > 0) { /* Parent */ |
2776 | /* Restore values */ |
2777 | pin = hpin; |
2778 | pout = hpout; |
2779 | *wp = hwp; |
2780 | interactive = hinteractive; |
2781 | intr = hintr; |
2782 | brklist = hbrklist; |
2783 | execflg = hexecflg; |
2784 | |
2785 | closepipe(pin); |
2786 | return (pout == NULL ? setstatus(waitfor(newpid, 0)) : 0); |
2787 | } |
2788 | |
2789 | /* Child */ |
2790 | DBGPRINTF(("FORKEXEC: child process, bltin=%p (%s)\n", bltin, bltin_name)); |
2791 | if (interactive) { |
2792 | signal(SIGINT, SIG_IGN); |
2793 | signal(SIGQUIT, SIG_IGN); |
2794 | resetsig = 1; |
2795 | } |
2796 | interactive = 0; |
2797 | intr = 0; |
2798 | forked = 1; |
2799 | brklist = 0; |
2800 | execflg = 0; |
2801 | } |
2802 | |
2803 | if (owp) |
2804 | while ((cp = *owp++) != NULL && assign(cp, COPYV)) |
2805 | if (!bltin) |
2806 | export(lookup(cp)); |
2807 | |
2808 | if (pin) { /* NB: close _first_, then move fds! */ |
2809 | close(pin[1]); |
2810 | xmove_fd(pin[0], 0); |
2811 | } |
2812 | if (pout) { |
2813 | close(pout[0]); |
2814 | xmove_fd(pout[1], 1); |
2815 | } |
2816 | |
2817 | iopp = t->ioact; |
2818 | if (iopp) { |
2819 | if (bltin && bltin != doexec) { |
2820 | prs(bltin_name); |
2821 | err(": can't redirect shell command"); |
2822 | if (forked) |
2823 | _exit(-1); |
2824 | return -1; |
2825 | } |
2826 | while (*iopp) { |
2827 | if (iosetup(*iopp++, pin != NULL, pout != NULL)) { |
2828 | /* system-detected error */ |
2829 | if (forked) |
2830 | _exit(-1); |
2831 | return -1; |
2832 | } |
2833 | } |
2834 | } |
2835 | |
2836 | if (bltin) { |
2837 | if (forked || pin || pout) { |
2838 | /* Builtin in pipe: disallowed */ |
2839 | /* TODO: allow "exec"? */ |
2840 | prs(bltin_name); |
2841 | err(": can't run builtin as part of pipe"); |
2842 | if (forked) |
2843 | _exit(-1); |
2844 | return -1; |
2845 | } |
2846 | /* Run builtin */ |
2847 | i = setstatus(bltin(t, wp)); |
2848 | if (forked) |
2849 | _exit(i); |
2850 | DBGPRINTF(("FORKEXEC: returning i=%d\n", i)); |
2851 | return i; |
2852 | } |
2853 | |
2854 | /* should use FIOCEXCL */ |
2855 | for (i = FDBASE; i < NOFILE; i++) |
2856 | close(i); |
2857 | if (resetsig) { |
2858 | signal(SIGINT, SIG_DFL); |
2859 | signal(SIGQUIT, SIG_DFL); |
2860 | } |
2861 | |
2862 | if (t->op_type == TPAREN) |
2863 | _exit(execute(t->left, NOPIPE, NOPIPE, /* no_fork: */ 1)); |
2864 | if (wp[0] == NULL) |
2865 | _exit(EXIT_SUCCESS); |
2866 | |
2867 | cp = rexecve(wp[0], wp, makenv(0, NULL)); |
2868 | prs(wp[0]); |
2869 | prs(": "); |
2870 | err(cp); |
2871 | if (!execflg) |
2872 | trap[0] = NULL; |
2873 | |
2874 | DBGPRINTF(("FORKEXEC: calling leave(), pid=%d\n", getpid())); |
2875 | |
2876 | leave(); |
2877 | /* NOTREACHED */ |
2878 | return 0; |
2879 | } |
2880 | |
2881 | /* |
2882 | * 0< 1> are ignored as required |
2883 | * within pipelines. |
2884 | */ |
2885 | static int iosetup(struct ioword *iop, int pipein, int pipeout) |
2886 | { |
2887 | int u = -1; |
2888 | char *cp = NULL; |
2889 | const char *msg; |
2890 | |
2891 | DBGPRINTF(("IOSETUP: iop %p, pipein %i, pipeout %i\n", iop, |
2892 | pipein, pipeout)); |
2893 | |
2894 | if (iop->io_fd == IODEFAULT) /* take default */ |
2895 | iop->io_fd = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1; |
2896 | |
2897 | if (pipein && iop->io_fd == 0) |
2898 | return 0; |
2899 | |
2900 | if (pipeout && iop->io_fd == 1) |
2901 | return 0; |
2902 | |
2903 | msg = iop->io_flag & (IOREAD | IOHERE) ? "open" : "create"; |
2904 | if ((iop->io_flag & IOHERE) == 0) { |
2905 | cp = iop->io_name; /* huh?? */ |
2906 | cp = evalstr(cp, DOSUB | DOTRIM); |
2907 | if (cp == NULL) |
2908 | return 1; |
2909 | } |
2910 | |
2911 | if (iop->io_flag & IODUP) { |
2912 | if (cp[1] || (!isdigit(*cp) && *cp != '-')) { |
2913 | prs(cp); |
2914 | err(": illegal >& argument"); |
2915 | return 1; |
2916 | } |
2917 | if (*cp == '-') |
2918 | iop->io_flag = IOCLOSE; |
2919 | iop->io_flag &= ~(IOREAD | IOWRITE); |
2920 | } |
2921 | |
2922 | switch (iop->io_flag) { |
2923 | case IOREAD: |
2924 | u = open(cp, O_RDONLY); |
2925 | break; |
2926 | |
2927 | case IOHERE: |
2928 | case IOHERE | IOXHERE: |
2929 | u = herein(iop->io_name, iop->io_flag & IOXHERE); |
2930 | cp = (char*)"here file"; |
2931 | break; |
2932 | |
2933 | case IOWRITE | IOCAT: |
2934 | u = open(cp, O_WRONLY); |
2935 | if (u >= 0) { |
2936 | lseek(u, (long) 0, SEEK_END); |
2937 | break; |
2938 | } |
2939 | /* fall through to creation if >>file doesn't exist */ |
2940 | |
2941 | case IOWRITE: |
2942 | u = creat(cp, 0666); |
2943 | break; |
2944 | |
2945 | case IODUP: |
2946 | u = dup2(*cp - '0', iop->io_fd); |
2947 | break; |
2948 | |
2949 | case IOCLOSE: |
2950 | close(iop->io_fd); |
2951 | return 0; |
2952 | } |
2953 | |
2954 | if (u < 0) { |
2955 | prs(cp); |
2956 | prs(": can't "); |
2957 | warn(msg); |
2958 | return 1; |
2959 | } |
2960 | xmove_fd(u, iop->io_fd); |
2961 | return 0; |
2962 | } |
2963 | |
2964 | /* |
2965 | * Enter a new loop level (marked for break/continue). |
2966 | */ |
2967 | static void brkset(struct brkcon *bc) |
2968 | { |
2969 | bc->nextlev = brklist; |
2970 | brklist = bc; |
2971 | } |
2972 | |
2973 | /* |
2974 | * Wait for the last process created. |
2975 | * Print a message for each process found |
2976 | * that was killed by a signal. |
2977 | * Ignore interrupt signals while waiting |
2978 | * unless `canintr' is true. |
2979 | */ |
2980 | static int waitfor(int lastpid, int canintr) |
2981 | { |
2982 | int pid, rv; |
2983 | int s; |
2984 | smallint oheedint = heedint; |
2985 | |
2986 | heedint = 0; |
2987 | rv = 0; |
2988 | do { |
2989 | pid = wait(&s); |
2990 | if (pid == -1) { |
2991 | if (errno != EINTR || canintr) |
2992 | break; |
2993 | } else { |
2994 | rv = WAITSIG(s); |
2995 | if (rv != 0) { |
2996 | if (rv < ARRAY_SIZE(signame)) { |
2997 | if (signame[rv] != NULL) { |
2998 | if (pid != lastpid) { |
2999 | prn(pid); |
3000 | prs(": "); |
3001 | } |
3002 | prs(signame[rv]); |
3003 | } |
3004 | } else { |
3005 | if (pid != lastpid) { |
3006 | prn(pid); |
3007 | prs(": "); |
3008 | } |
3009 | prs("Signal "); |
3010 | prn(rv); |
3011 | prs(" "); |
3012 | } |
3013 | if (WAITCORE(s)) |
3014 | prs(" - core dumped"); |
3015 | if (rv >= ARRAY_SIZE(signame) || signame[rv]) |
3016 | prs("\n"); |
3017 | rv |= 0x80; |
3018 | } else |
3019 | rv = WAITVAL(s); |
3020 | } |
3021 | } while (pid != lastpid); |
3022 | heedint = oheedint; |
3023 | if (intr) { |
3024 | if (interactive) { |
3025 | if (canintr) |
3026 | intr = 0; |
3027 | } else { |
3028 | if (exstat == 0) |
3029 | exstat = rv; |
3030 | onintr(0); |
3031 | } |
3032 | } |
3033 | return rv; |
3034 | } |
3035 | |
3036 | static int setstatus(int s) |
3037 | { |
3038 | exstat = s; |
3039 | setval(lookup("?"), putn(s)); |
3040 | return s; |
3041 | } |
3042 | |
3043 | /* |
3044 | * PATH-searching interface to execve. |
3045 | * If getenv("PATH") were kept up-to-date, |
3046 | * execvp might be used. |
3047 | */ |
3048 | static const char *rexecve(char *c, char **v, char **envp) |
3049 | { |
3050 | const char *sp; |
3051 | char *tp; |
3052 | int asis = 0; |
3053 | char *name = c; |
3054 | |
3055 | if (ENABLE_FEATURE_SH_STANDALONE) { |
3056 | if (find_applet_by_name(name) >= 0) { |
3057 | /* We have to exec here since we vforked. Running |
3058 | * run_applet_and_exit() won't work and bad things |
3059 | * will happen. */ |
3060 | execve(bb_busybox_exec_path, v, envp); |
3061 | } |
3062 | } |
3063 | |
3064 | DBGPRINTF(("REXECVE: c=%p, v=%p, envp=%p\n", c, v, envp)); |
3065 | |
3066 | sp = any('/', c) ? "" : path->value; |
3067 | asis = (*sp == '\0'); |
3068 | while (asis || *sp != '\0') { |
3069 | asis = 0; |
3070 | tp = global_env.linep; |
3071 | for (; *sp != '\0'; tp++) { |
3072 | *tp = *sp++; |
3073 | if (*tp == ':') { |
3074 | asis = (*sp == '\0'); |
3075 | break; |
3076 | } |
3077 | } |
3078 | if (tp != global_env.linep) |
3079 | *tp++ = '/'; |
3080 | strcpy(tp, c); |
3081 | |
3082 | DBGPRINTF3(("REXECVE: global_env.linep is %s\n", global_env.linep)); |
3083 | |
3084 | execve(global_env.linep, v, envp); |
3085 | |
3086 | switch (errno) { |
3087 | case ENOEXEC: |
3088 | /* File is executable but file format isnt recognized */ |
3089 | /* Run it as a shell script */ |
3090 | /* (execve above didnt do it itself, unlike execvp) */ |
3091 | *v = global_env.linep; |
3092 | v--; |
3093 | tp = *v; |
3094 | *v = (char*)DEFAULT_SHELL; |
3095 | execve(DEFAULT_SHELL, v, envp); |
3096 | *v = tp; |
3097 | return "no shell"; |
3098 | |
3099 | case ENOMEM: |
3100 | return (char *) bb_msg_memory_exhausted; |
3101 | |
3102 | case E2BIG: |
3103 | return "argument list too long"; |
3104 | } |
3105 | } |
3106 | if (errno == ENOENT) { |
3107 | exstat = 127; /* standards require this */ |
3108 | return "not found"; |
3109 | } |
3110 | exstat = 126; /* mimic bash */ |
3111 | return "can't execute"; |
3112 | } |
3113 | |
3114 | /* |
3115 | * Run the command produced by generator `f' |
3116 | * applied to stream `arg'. |
3117 | */ |
3118 | static int run(struct ioarg *argp, int (*f) (struct ioarg *)) |
3119 | { |
3120 | struct op *otree; |
3121 | struct wdblock *swdlist; |
3122 | struct wdblock *siolist; |
3123 | jmp_buf ev, rt; |
3124 | xint *ofail; |
3125 | int rv; |
3126 | |
3127 | #if __GNUC__ |
3128 | /* Avoid longjmp clobbering */ |
3129 | (void) &rv; |
3130 | #endif |
3131 | |
3132 | DBGPRINTF(("RUN: enter, areanum %d, outtree %p, failpt %p\n", |
3133 | areanum, outtree, failpt)); |
3134 | |
3135 | areanum++; |
3136 | swdlist = wdlist; |
3137 | siolist = iolist; |
3138 | otree = outtree; |
3139 | ofail = failpt; |
3140 | rv = -1; |
3141 | |
3142 | errpt = ev; |
3143 | if (newenv(setjmp(errpt)) == 0) { |
3144 | wdlist = NULL; |
3145 | iolist = NULL; |
3146 | pushio(argp, f); |
3147 | global_env.iobase = global_env.iop; |
3148 | yynerrs = 0; |
3149 | failpt = rt; |
3150 | if (setjmp(failpt) == 0 && yyparse() == 0) |
3151 | rv = execute(outtree, NOPIPE, NOPIPE, /* no_fork: */ 0); |
3152 | quitenv(); |
3153 | } else { |
3154 | DBGPRINTF(("RUN: error from newenv()!\n")); |
3155 | } |
3156 | |
3157 | wdlist = swdlist; |
3158 | iolist = siolist; |
3159 | failpt = ofail; |
3160 | outtree = otree; |
3161 | freearea(areanum--); |
3162 | |
3163 | return rv; |
3164 | } |
3165 | |
3166 | /* -------- do.c -------- */ |
3167 | |
3168 | /* |
3169 | * built-in commands: doX |
3170 | */ |
3171 | |
3172 | static int dohelp(struct op *t UNUSED_PARAM, char **args UNUSED_PARAM) |
3173 | { |
3174 | int col; |
3175 | const struct builtincmd *x; |
3176 | |
3177 | printf( |
3178 | "Built-in commands:\n" |
3179 | "------------------\n"); |
3180 | |
3181 | col = 0; |
3182 | x = builtincmds; |
3183 | while (x->name) { |
3184 | col += printf("%c%s", ((col == 0) ? '\t' : ' '), x->name); |
3185 | if (col > 60) { |
3186 | bb_putchar('\n'); |
3187 | col = 0; |
3188 | } |
3189 | x++; |
3190 | } |
3191 | #if ENABLE_FEATURE_SH_STANDALONE |
3192 | { |
3193 | const char *applet = applet_names; |
3194 | |
3195 | while (*applet) { |
3196 | col += printf("%c%s", ((col == 0) ? '\t' : ' '), applet); |
3197 | if (col > 60) { |
3198 | bb_putchar('\n'); |
3199 | col = 0; |
3200 | } |
3201 | applet += strlen(applet) + 1; |
3202 | } |
3203 | } |
3204 | #endif |
3205 | puts("\n"); |
3206 | return EXIT_SUCCESS; |
3207 | } |
3208 | |
3209 | static int dolabel(struct op *t UNUSED_PARAM, char **args UNUSED_PARAM) |
3210 | { |
3211 | return 0; |
3212 | } |
3213 | |
3214 | static int dochdir(struct op *t UNUSED_PARAM, char **args) |
3215 | { |
3216 | const char *cp, *er; |
3217 | |
3218 | cp = args[1]; |
3219 | if (cp == NULL) { |
3220 | cp = homedir->value; |
3221 | if (cp != NULL) |
3222 | goto do_cd; |
3223 | er = ": no home directory"; |
3224 | } else { |
3225 | do_cd: |
3226 | if (chdir(cp) >= 0) |
3227 | return 0; |
3228 | er = ": bad directory"; |
3229 | } |
3230 | prs(cp != NULL ? cp : "cd"); |
3231 | err(er); |
3232 | return 1; |
3233 | } |
3234 | |
3235 | static int doshift(struct op *t UNUSED_PARAM, char **args) |
3236 | { |
3237 | int n; |
3238 | |
3239 | n = args[1] ? getn(args[1]) : 1; |
3240 | if (dolc < n) { |
3241 | err("nothing to shift"); |
3242 | return 1; |
3243 | } |
3244 | dolv[n] = dolv[0]; |
3245 | dolv += n; |
3246 | dolc -= n; |
3247 | setval(lookup("#"), putn(dolc)); |
3248 | return 0; |
3249 | } |
3250 | |
3251 | /* |
3252 | * execute login and newgrp directly |
3253 | */ |
3254 | static int dologin(struct op *t UNUSED_PARAM, char **args) |
3255 | { |
3256 | const char *cp; |
3257 | |
3258 | if (interactive) { |
3259 | signal(SIGINT, SIG_DFL); |
3260 | signal(SIGQUIT, SIG_DFL); |
3261 | } |
3262 | cp = rexecve(args[0], args, makenv(0, NULL)); |
3263 | prs(args[0]); |
3264 | prs(": "); |
3265 | err(cp); |
3266 | return 1; |
3267 | } |
3268 | |
3269 | static int doumask(struct op *t UNUSED_PARAM, char **args) |
3270 | { |
3271 | int i; |
3272 | char *cp; |
3273 | |
3274 | cp = args[1]; |
3275 | if (cp == NULL) { |
3276 | i = umask(0); |
3277 | umask(i); |
3278 | printf("%04o\n", i); |
3279 | } else { |
3280 | i = bb_strtou(cp, NULL, 8); |
3281 | if (errno) { |
3282 | err("umask: bad octal number"); |
3283 | return 1; |
3284 | } |
3285 | umask(i); |
3286 | } |
3287 | return 0; |
3288 | } |
3289 | |
3290 | static int doexec(struct op *t, char **args) |
3291 | { |
3292 | jmp_buf ex; |
3293 | xint *ofail; |
3294 | char **sv_words; |
3295 | |
3296 | t->ioact = NULL; |
3297 | if (!args[1]) |
3298 | return 1; |
3299 | |
3300 | execflg = 1; |
3301 | ofail = failpt; |
3302 | failpt = ex; |
3303 | |
3304 | sv_words = t->op_words; |
3305 | t->op_words = args + 1; |
3306 | // TODO: test what will happen with "exec break" - |
3307 | // will it leave t->op_words pointing to garbage? |
3308 | // (see http://bugs.busybox.net/view.php?id=846) |
3309 | if (setjmp(failpt) == 0) |
3310 | execute(t, NOPIPE, NOPIPE, /* no_fork: */ 1); |
3311 | t->op_words = sv_words; |
3312 | |
3313 | failpt = ofail; |
3314 | execflg = 0; |
3315 | |
3316 | return 1; |
3317 | } |
3318 | |
3319 | static int dodot(struct op *t UNUSED_PARAM, char **args) |
3320 | { |
3321 | int i; |
3322 | const char *sp; |
3323 | char *tp; |
3324 | char *cp; |
3325 | int maltmp; |
3326 | |
3327 | DBGPRINTF(("DODOT: enter, t=%p, tleft %p, tright %p, global_env.linep is %s\n", |
3328 | t, t->left, t->right, ((global_env.linep == NULL) ? "NULL" : global_env.linep))); |
3329 | |
3330 | cp = args[1]; |
3331 | if (cp == NULL) { |
3332 | DBGPRINTF(("DODOT: bad args, ret 0\n")); |
3333 | return 0; |
3334 | } |
3335 | DBGPRINTF(("DODOT: cp is %s\n", cp)); |
3336 | |
3337 | sp = any('/', cp) ? ":" : path->value; |
3338 | |
3339 | DBGPRINTF(("DODOT: sp is %s, global_env.linep is %s\n", |
3340 | ((sp == NULL) ? "NULL" : sp), |
3341 | ((global_env.linep == NULL) ? "NULL" : global_env.linep))); |
3342 | |
3343 | while (*sp) { |
3344 | tp = global_env.linep; |
3345 | while (*sp && (*tp = *sp++) != ':') |
3346 | tp++; |
3347 | if (tp != global_env.linep) |
3348 | *tp++ = '/'; |
3349 | strcpy(tp, cp); |
3350 | |
3351 | /* Original code */ |
3352 | i = open(global_env.linep, O_RDONLY); |
3353 | if (i >= 0) { |
3354 | exstat = 0; |
3355 | maltmp = remap(i); |
3356 | DBGPRINTF(("DODOT: remap=%d, exstat=%d, global_env.iofd %d, i %d, global_env.linep is %s\n", |
3357 | maltmp, exstat, global_env.iofd, i, global_env.linep)); |
3358 | |
3359 | next(maltmp); /* Basically a PUSHIO */ |
3360 | |
3361 | DBGPRINTF(("DODOT: returning exstat=%d\n", exstat)); |
3362 | |
3363 | return exstat; |
3364 | } |
3365 | } /* while */ |
3366 | |
3367 | prs(cp); |
3368 | err(": not found"); |
3369 | |
3370 | return -1; |
3371 | } |
3372 | |
3373 | static int dowait(struct op *t UNUSED_PARAM, char **args) |
3374 | { |
3375 | int i; |
3376 | char *cp; |
3377 | |
3378 | cp = args[1]; |
3379 | if (cp != NULL) { |
3380 | i = getn(cp); |
3381 | if (i == 0) |
3382 | return 0; |
3383 | } else |
3384 | i = -1; |
3385 | setstatus(waitfor(i, 1)); |
3386 | return 0; |
3387 | } |
3388 | |
3389 | static int doread(struct op *t UNUSED_PARAM, char **args) |
3390 | { |
3391 | char *cp, **wp; |
3392 | int nb = 0; |
3393 | int nl = 0; |
3394 | |
3395 | if (args[1] == NULL) { |
3396 | err("Usage: read name ..."); |
3397 | return 1; |
3398 | } |
3399 | for (wp = args + 1; *wp; wp++) { |
3400 | for (cp = global_env.linep; !nl && cp < elinep - 1; cp++) { |
3401 | nb = nonblock_safe_read(STDIN_FILENO, cp, sizeof(*cp)); |
3402 | if (nb != sizeof(*cp)) |
3403 | break; |
3404 | nl = (*cp == '\n'); |
3405 | if (nl || (wp[1] && any(*cp, ifs->value))) |
3406 | break; |
3407 | } |
3408 | *cp = '\0'; |
3409 | if (nb <= 0) |
3410 | break; |
3411 | setval(lookup(*wp), global_env.linep); |
3412 | } |
3413 | return nb <= 0; |
3414 | } |
3415 | |
3416 | static int doeval(struct op *t UNUSED_PARAM, char **args) |
3417 | { |
3418 | return RUN(awordlist, args + 1, wdchar); |
3419 | } |
3420 | |
3421 | static int dotrap(struct op *t UNUSED_PARAM, char **args) |
3422 | { |
3423 | int n, i; |
3424 | int resetsig; |
3425 | |
3426 | if (args[1] == NULL) { |
3427 | for (i = 0; i <= _NSIG; i++) |
3428 | if (trap[i]) { |
3429 | prn(i); |
3430 | prs(": "); |
3431 | prs(trap[i]); |
3432 | prs("\n"); |
3433 | } |
3434 | return 0; |
3435 | } |
3436 | resetsig = isdigit(args[1][0]); |
3437 | for (i = resetsig ? 1 : 2; args[i] != NULL; ++i) { |
3438 | n = getsig(args[i]); |
3439 | freecell(trap[n]); |
3440 | trap[n] = 0; |
3441 | if (!resetsig) { |
3442 | if (args[1][0] != '\0') { |
3443 | trap[n] = strsave(args[1], 0); |
3444 | setsig(n, sig); |
3445 | } else |
3446 | setsig(n, SIG_IGN); |
3447 | } else { |
3448 | if (interactive) { |
3449 | if (n == SIGINT) |
3450 | setsig(n, onintr); |
3451 | else |
3452 | setsig(n, n == SIGQUIT ? SIG_IGN : SIG_DFL); |
3453 | } else |
3454 | setsig(n, SIG_DFL); |
3455 | } |
3456 | } |
3457 | return 0; |
3458 | } |
3459 | |
3460 | static int getsig(char *s) |
3461 | { |
3462 | int n; |
3463 | |
3464 | n = getn(s); |
3465 | if (n < 0 || n > _NSIG) { |
3466 | err("trap: bad signal number"); |
3467 | n = 0; |
3468 | } |
3469 | return n; |
3470 | } |
3471 | |
3472 | static void setsig(int n, sighandler_t f) |
3473 | { |
3474 | if (n == 0) |
3475 | return; |
3476 | if (signal(n, SIG_IGN) != SIG_IGN || ourtrap[n]) { |
3477 | ourtrap[n] = 1; |
3478 | signal(n, f); |
3479 | } |
3480 | } |
3481 | |
3482 | static int getn(char *as) |
3483 | { |
3484 | char *s; |
3485 | int n, m; |
3486 | |
3487 | s = as; |
3488 | m = 1; |
3489 | if (*s == '-') { |
3490 | m = -1; |
3491 | s++; |
3492 | } |
3493 | for (n = 0; isdigit(*s); s++) |
3494 | n = (n * 10) + (*s - '0'); |
3495 | if (*s) { |
3496 | prs(as); |
3497 | err(": bad number"); |
3498 | } |
3499 | return n * m; |
3500 | } |
3501 | |
3502 | static int dobreak(struct op *t UNUSED_PARAM, char **args) |
3503 | { |
3504 | return brkcontin(args[1], 1); |
3505 | } |
3506 | |
3507 | static int docontinue(struct op *t UNUSED_PARAM, char **args) |
3508 | { |
3509 | return brkcontin(args[1], 0); |
3510 | } |
3511 | |
3512 | static int brkcontin(char *cp, int val) |
3513 | { |
3514 | struct brkcon *bc; |
3515 | int nl; |
3516 | |
3517 | nl = cp == NULL ? 1 : getn(cp); |
3518 | if (nl <= 0) |
3519 | nl = 999; |
3520 | do { |
3521 | bc = brklist; |
3522 | if (bc == NULL) |
3523 | break; |
3524 | brklist = bc->nextlev; |
3525 | } while (--nl); |
3526 | if (nl) { |
3527 | err("bad break/continue level"); |
3528 | return 1; |
3529 | } |
3530 | isbreak = (val != 0); |
3531 | longjmp(bc->brkpt, 1); |
3532 | /* NOTREACHED */ |
3533 | } |
3534 | |
3535 | static int doexit(struct op *t UNUSED_PARAM, char **args) |
3536 | { |
3537 | char *cp; |
3538 | |
3539 | execflg = 0; |
3540 | cp = args[1]; |
3541 | if (cp != NULL) |
3542 | setstatus(getn(cp)); |
3543 | |
3544 | DBGPRINTF(("DOEXIT: calling leave(), t=%p\n", t)); |
3545 | |
3546 | leave(); |
3547 | /* NOTREACHED */ |
3548 | return 0; |
3549 | } |
3550 | |
3551 | static int doexport(struct op *t UNUSED_PARAM, char **args) |
3552 | { |
3553 | rdexp(args + 1, export, EXPORT); |
3554 | return 0; |
3555 | } |
3556 | |
3557 | static int doreadonly(struct op *t UNUSED_PARAM, char **args) |
3558 | { |
3559 | rdexp(args + 1, ronly, RONLY); |
3560 | return 0; |
3561 | } |
3562 | |
3563 | static void rdexp(char **wp, void (*f) (struct var *), int key) |
3564 | { |
3565 | DBGPRINTF6(("RDEXP: enter, wp=%p, func=%p, key=%d\n", wp, f, key)); |
3566 | DBGPRINTF6(("RDEXP: *wp=%s\n", *wp)); |
3567 | |
3568 | if (*wp != NULL) { |
3569 | for (; *wp != NULL; wp++) { |
3570 | if (isassign(*wp)) { |
3571 | char *cp; |
3572 | |
3573 | assign(*wp, COPYV); |
3574 | for (cp = *wp; *cp != '='; cp++) |
3575 | continue; |
3576 | *cp = '\0'; |
3577 | } |
3578 | if (checkname(*wp)) |
3579 | (*f) (lookup(*wp)); |
3580 | else |
3581 | badid(*wp); |
3582 | } |
3583 | } else |
3584 | putvlist(key, 1); |
3585 | } |
3586 | |
3587 | static void badid(char *s) |
3588 | { |
3589 | prs(s); |
3590 | err(": bad identifier"); |
3591 | } |
3592 | |
3593 | static int doset(struct op *t UNUSED_PARAM, char **args) |
3594 | { |
3595 | struct var *vp; |
3596 | char *cp; |
3597 | int n; |
3598 | |
3599 | cp = args[1]; |
3600 | if (cp == NULL) { |
3601 | for (vp = vlist; vp; vp = vp->next) |
3602 | varput(vp->name, STDOUT_FILENO); |
3603 | return 0; |
3604 | } |
3605 | if (*cp == '-') { |
3606 | args++; |
3607 | if (*++cp == 0) |
3608 | FLAG['x'] = FLAG['v'] = 0; |
3609 | else { |
3610 | for (; *cp; cp++) { |
3611 | switch (*cp) { |
3612 | case 'e': |
3613 | if (!interactive) |
3614 | FLAG['e']++; |
3615 | break; |
3616 | |
3617 | default: |
3618 | if (*cp >= 'a' && *cp <= 'z') |
3619 | FLAG[(int) *cp]++; |
3620 | break; |
3621 | } |
3622 | } |
3623 | } |
3624 | setdash(); |
3625 | } |
3626 | if (args[1]) { |
3627 | args[0] = dolv[0]; |
3628 | for (n = 1; args[n]; n++) |
3629 | setarea((char *) args[n], 0); |
3630 | dolc = n - 1; |
3631 | dolv = args; |
3632 | setval(lookup("#"), putn(dolc)); |
3633 | setarea((char *) (dolv - 1), 0); |
3634 | } |
3635 | return 0; |
3636 | } |
3637 | |
3638 | static void varput(char *s, int out) |
3639 | { |
3640 | if (isalnum(*s) || *s == '_') { |
3641 | xwrite_str(out, s); |
3642 | xwrite(out, "\n", 1); |
3643 | } |
3644 | } |
3645 | |
3646 | |
3647 | /* |
3648 | * Copyright (c) 1999 Herbert Xu <herbert@debian.org> |
3649 | * This file contains code for the times builtin. |
3650 | */ |
3651 | static void times_fmt(char *buf, clock_t val, unsigned clk_tck) |
3652 | { |
3653 | unsigned min, sec; |
3654 | if (sizeof(val) > sizeof(int)) |
3655 | sec = ((unsigned long)val) / clk_tck; |
3656 | else |
3657 | sec = ((unsigned)val) / clk_tck; |
3658 | min = sec / 60; |
3659 | #if ENABLE_DESKTOP |
3660 | sprintf(buf, "%um%u.%03us", min, (sec - min * 60), |
3661 | /* msec: */ ((unsigned)(val - (clock_t)sec * clk_tck)) * 1000 / clk_tck |
3662 | ); |
3663 | #else |
3664 | sprintf(buf, "%um%us", min, (sec - min * 60)); |
3665 | #endif |
3666 | } |
3667 | |
3668 | static int dotimes(struct op *t UNUSED_PARAM, char **args UNUSED_PARAM) |
3669 | { |
3670 | struct tms buf; |
3671 | unsigned clk_tck = sysconf(_SC_CLK_TCK); |
3672 | /* How much do we need for "NmN.NNNs" ? */ |
3673 | enum { TIMEBUF_SIZE = sizeof(int)*3 + sizeof(int)*3 + 6 }; |
3674 | char u[TIMEBUF_SIZE], s[TIMEBUF_SIZE]; |
3675 | char cu[TIMEBUF_SIZE], cs[TIMEBUF_SIZE]; |
3676 | |
3677 | times(&buf); |
3678 | |
3679 | times_fmt(u, buf.tms_utime, clk_tck); |
3680 | times_fmt(s, buf.tms_stime, clk_tck); |
3681 | times_fmt(cu, buf.tms_cutime, clk_tck); |
3682 | times_fmt(cs, buf.tms_cstime, clk_tck); |
3683 | |
3684 | printf("%s %s\n%s %s\n", u, s, cu, cs); |
3685 | return 0; |
3686 | } |
3687 | |
3688 | |
3689 | /* -------- eval.c -------- */ |
3690 | |
3691 | /* |
3692 | * ${} |
3693 | * `command` |
3694 | * blank interpretation |
3695 | * quoting |
3696 | * glob |
3697 | */ |
3698 | |
3699 | static char **eval(char **ap, int f) |
3700 | { |
3701 | struct wdblock *wb; |
3702 | char **wp; |
3703 | char **wf; |
3704 | jmp_buf ev; |
3705 | |
3706 | #if __GNUC__ |
3707 | /* Avoid longjmp clobbering */ |
3708 | (void) ℘ |
3709 | (void) ≈ |
3710 | #endif |
3711 | |
3712 | DBGPRINTF4(("EVAL: enter, f=%d\n", f)); |
3713 | |
3714 | wp = NULL; |
3715 | wb = NULL; |
3716 | wf = NULL; |
3717 | errpt = ev; |
3718 | if (newenv(setjmp(errpt)) == 0) { |
3719 | while (*ap && isassign(*ap)) |
3720 | expand(*ap++, &wb, f & ~DOGLOB); |
3721 | if (FLAG['k']) { |
3722 | for (wf = ap; *wf; wf++) { |
3723 | if (isassign(*wf)) |
3724 | expand(*wf, &wb, f & ~DOGLOB); |
3725 | } |
3726 | } |
3727 | for (wb = addword((char *) NULL, wb); *ap; ap++) { |
3728 | if (!FLAG['k'] || !isassign(*ap)) |
3729 | expand(*ap, &wb, f & ~DOKEY); |
3730 | } |
3731 | wb = addword((char *) 0, wb); |
3732 | wp = getwords(wb); |
3733 | quitenv(); |
3734 | } else |
3735 | gflg = 1; |
3736 | |
3737 | return gflg ? (char **) NULL : wp; |
3738 | } |
3739 | |
3740 | |
3741 | /* |
3742 | * Make the exported environment from the exported |
3743 | * names in the dictionary. Keyword assignments |
3744 | * will already have been done. |
3745 | */ |
3746 | static char **makenv(int all, struct wdblock *wb) |
3747 | { |
3748 | struct var *vp; |
3749 | |
3750 | DBGPRINTF5(("MAKENV: enter, all=%d\n", all)); |
3751 | |
3752 | for (vp = vlist; vp; vp = vp->next) |
3753 | if (all || vp->status & EXPORT) |
3754 | wb = addword(vp->name, wb); |
3755 | wb = addword((char *) 0, wb); |
3756 | return getwords(wb); |
3757 | } |
3758 | |
3759 | static int expand(const char *cp, struct wdblock **wbp, int f) |
3760 | { |
3761 | jmp_buf ev; |
3762 | char *xp; |
3763 | |
3764 | #if __GNUC__ |
3765 | /* Avoid longjmp clobbering */ |
3766 | (void) &cp; |
3767 | #endif |
3768 | |
3769 | DBGPRINTF3(("EXPAND: enter, f=%d\n", f)); |
3770 | |
3771 | gflg = 0; |
3772 | |
3773 | if (cp == NULL) |
3774 | return 0; |
3775 | |
3776 | if (!anys("$`'\"", cp) && !anys(ifs->value, cp) |
3777 | && ((f & DOGLOB) == 0 || !anys("[*?", cp)) |
3778 | ) { |
3779 | xp = strsave(cp, areanum); |
3780 | if (f & DOTRIM) |
3781 | unquote(xp); |
3782 | *wbp = addword(xp, *wbp); |
3783 | return 1; |
3784 | } |
3785 | errpt = ev; |
3786 | if (newenv(setjmp(errpt)) == 0) { |
3787 | PUSHIO(aword, cp, strchar); |
3788 | global_env.iobase = global_env.iop; |
3789 | while ((xp = blank(f)) && gflg == 0) { |
3790 | global_env.linep = xp; |
3791 | xp = strsave(xp, areanum); |
3792 | if ((f & DOGLOB) == 0) { |
3793 | if (f & DOTRIM) |
3794 | unquote(xp); |
3795 | *wbp = addword(xp, *wbp); |
3796 | } else |
3797 | *wbp = glob(xp, *wbp); |
3798 | } |
3799 | quitenv(); |
3800 | } else |
3801 | gflg = 1; |
3802 | return gflg == 0; |
3803 | } |
3804 | |
3805 | static char *evalstr(char *cp, int f) |
3806 | { |
3807 | struct wdblock *wb; |
3808 | |
3809 | DBGPRINTF6(("EVALSTR: enter, cp=%p, f=%d\n", cp, f)); |
3810 | |
3811 | wb = NULL; |
3812 | if (expand(cp, &wb, f)) { |
3813 | if (wb == NULL || wb->w_nword == 0 |
3814 | || (cp = wb->w_words[0]) == NULL |
3815 | ) { |
3816 | // TODO: I suspect that |
3817 | // char *evalstr(char *cp, int f) is actually |
3818 | // const char *evalstr(const char *cp, int f)! |
3819 | cp = (char*)""; |
3820 | } |
3821 | DELETE(wb); |
3822 | } else |
3823 | cp = NULL; |
3824 | return cp; |
3825 | } |
3826 | |
3827 | |
3828 | /* |
3829 | * Blank interpretation and quoting |
3830 | */ |
3831 | static char *blank(int f) |
3832 | { |
3833 | int c, c1; |
3834 | char *sp; |
3835 | int scanequals, foundequals; |
3836 | |
3837 | DBGPRINTF3(("BLANK: enter, f=%d\n", f)); |
3838 | |
3839 | sp = global_env.linep; |
3840 | scanequals = f & DOKEY; |
3841 | foundequals = 0; |
3842 | |
3843 | loop: |
3844 | c = subgetc('"', foundequals); |
3845 | switch (c) { |
3846 | case 0: |
3847 | if (sp == global_env.linep) |
3848 | return 0; |
3849 | *global_env.linep++ = 0; |
3850 | return sp; |
3851 | |
3852 | default: |
3853 | if (f & DOBLANK && any(c, ifs->value)) |
3854 | goto loop; |
3855 | break; |
3856 | |
3857 | case '"': |
3858 | case '\'': |
3859 | scanequals = 0; |
3860 | if (INSUB()) |
3861 | break; |
3862 | for (c1 = c; (c = subgetc(c1, 1)) != c1;) { |
3863 | if (c == 0) |
3864 | break; |
3865 | if (c == '\'' || !any(c, "$`\"")) |
3866 | c |= QUOTE; |
3867 | *global_env.linep++ = c; |
3868 | } |
3869 | c = 0; |
3870 | } |
3871 | unget(c); |
3872 | if (!isalpha(c) && c != '_') |
3873 | scanequals = 0; |
3874 | for (;;) { |
3875 | c = subgetc('"', foundequals); |
3876 | if (c == 0 || |
3877 | f & (DOBLANK && any(c, ifs->value)) || |
3878 | (!INSUB() && any(c, "\"'"))) { |
3879 | scanequals = 0; |
3880 | unget(c); |
3881 | if (any(c, "\"'")) |
3882 | goto loop; |
3883 | break; |
3884 | } |
3885 | if (scanequals) { |
3886 | if (c == '=') { |
3887 | foundequals = 1; |
3888 | scanequals = 0; |
3889 | } else if (!isalnum(c) && c != '_') |
3890 | scanequals = 0; |
3891 | } |
3892 | *global_env.linep++ = c; |
3893 | } |
3894 | *global_env.linep++ = 0; |
3895 | return sp; |
3896 | } |
3897 | |
3898 | /* |
3899 | * Get characters, substituting for ` and $ |
3900 | */ |
3901 | static int subgetc(char ec, int quoted) |
3902 | { |
3903 | char c; |
3904 | |
3905 | DBGPRINTF3(("SUBGETC: enter, quoted=%d\n", quoted)); |
3906 | |
3907 | again: |
3908 | c = my_getc(ec); |
3909 | if (!INSUB() && ec != '\'') { |
3910 | if (c == '`') { |
3911 | if (grave(quoted) == 0) |
3912 | return 0; |
3913 | global_env.iop->task = XGRAVE; |
3914 | goto again; |
3915 | } |
3916 | if (c == '$') { |
3917 | c = dollar(quoted); |
3918 | if (c == 0) { |
3919 | global_env.iop->task = XDOLL; |
3920 | goto again; |
3921 | } |
3922 | } |
3923 | } |
3924 | return c; |
3925 | } |
3926 | |
3927 | /* |
3928 | * Prepare to generate the string returned by ${} substitution. |
3929 | */ |
3930 | static int dollar(int quoted) |
3931 | { |
3932 | int otask; |
3933 | struct io *oiop; |
3934 | char *dolp; |
3935 | char *s, c, *cp = NULL; |
3936 | struct var *vp; |
3937 | |
3938 | DBGPRINTF3(("DOLLAR: enter, quoted=%d\n", quoted)); |
3939 | |
3940 | c = readc(); |
3941 | s = global_env.linep; |
3942 | if (c != '{') { |
3943 | *global_env.linep++ = c; |
3944 | if (isalpha(c) || c == '_') { |
3945 | while ((c = readc()) != 0 && (isalnum(c) || c == '_')) |
3946 | if (global_env.linep < elinep) |
3947 | *global_env.linep++ = c; |
3948 | unget(c); |
3949 | } |
3950 | c = 0; |
3951 | } else { |
3952 | oiop = global_env.iop; |
3953 | otask = global_env.iop->task; |
3954 | |
3955 | global_env.iop->task = XOTHER; |
3956 | while ((c = subgetc('"', 0)) != 0 && c != '}' && c != '\n') |
3957 | if (global_env.linep < elinep) |
3958 | *global_env.linep++ = c; |
3959 | if (oiop == global_env.iop) |
3960 | global_env.iop->task = otask; |
3961 | if (c != '}') { |
3962 | err("unclosed ${"); |
3963 | gflg = 1; |
3964 | return c; |
3965 | } |
3966 | } |
3967 | if (global_env.linep >= elinep) { |
3968 | err("string in ${} too long"); |
3969 | gflg = 1; |
3970 | global_env.linep -= 10; |
3971 | } |
3972 | *global_env.linep = 0; |
3973 | if (*s) |
3974 | for (cp = s + 1; *cp; cp++) |
3975 | if (any(*cp, "=-+?")) { |
3976 | c = *cp; |
3977 | *cp++ = 0; |
3978 | break; |
3979 | } |
3980 | if (s[1] == 0 && (*s == '*' || *s == '@')) { |
3981 | if (dolc > 1) { |
3982 | /* currently this does not distinguish $* and $@ */ |
3983 | /* should check dollar */ |
3984 | global_env.linep = s; |
3985 | PUSHIO(awordlist, dolv + 1, dolchar); |
3986 | return 0; |
3987 | } else { /* trap the nasty ${=} */ |
3988 | s[0] = '1'; |
3989 | s[1] = '\0'; |
3990 | } |
3991 | } |
3992 | vp = lookup(s); |
3993 | dolp = vp->value; |
3994 | if (dolp == null) { |
3995 | switch (c) { |
3996 | case '=': |
3997 | if (isdigit(*s)) { |
3998 | err("can't use ${...=...} with $n"); |
3999 | gflg = 1; |
4000 | break; |
4001 | } |
4002 | setval(vp, cp); |
4003 | dolp = vp->value; |
4004 | break; |
4005 | |
4006 | case '-': |
4007 | dolp = strsave(cp, areanum); |
4008 | break; |
4009 | |
4010 | case '?': |
4011 | if (*cp == 0) { |
4012 | prs("missing value for "); |
4013 | err(s); |
4014 | } else |
4015 | err(cp); |
4016 | gflg = 1; |
4017 | break; |
4018 | } |
4019 | } else if (c == '+') |
4020 | dolp = strsave(cp, areanum); |
4021 | if (FLAG['u'] && dolp == null) { |
4022 | prs("unset variable: "); |
4023 | err(s); |
4024 | gflg = 1; |
4025 | } |
4026 | global_env.linep = s; |
4027 | PUSHIO(aword, dolp, quoted ? qstrchar : strchar); |
4028 | return 0; |
4029 | } |
4030 | |
4031 | /* |
4032 | * Run the command in `...` and read its output. |
4033 | */ |
4034 | |
4035 | static int grave(int quoted) |
4036 | { |
4037 | /* moved to G: static char child_cmd[LINELIM]; */ |
4038 | |
4039 | const char *cp; |
4040 | int i; |
4041 | int j; |
4042 | int pf[2]; |
4043 | const char *src; |
4044 | char *dest; |
4045 | int count; |
4046 | int ignore; |
4047 | int ignore_once; |
4048 | char *argument_list[4]; |
4049 | struct wdblock *wb = NULL; |
4050 | |
4051 | #if __GNUC__ |
4052 | /* Avoid longjmp clobbering */ |
4053 | (void) &cp; |
4054 | #endif |
4055 | |
4056 | for (cp = global_env.iop->argp->aword; *cp != '`'; cp++) { |
4057 | if (*cp == 0) { |
4058 | err("no closing `"); |
4059 | return 0; |
4060 | } |
4061 | } |
4062 | |
4063 | /* string copy with dollar expansion */ |
4064 | src = global_env.iop->argp->aword; |
4065 | dest = child_cmd; |
4066 | count = 0; |
4067 | ignore = 0; |
4068 | ignore_once = 0; |
4069 | while ((*src != '`') && (count < LINELIM)) { |
4070 | if (*src == '\'') |
4071 | ignore = !ignore; |
4072 | if (*src == '\\') |
4073 | ignore_once = 1; |
4074 | if (*src == '$' && !ignore && !ignore_once) { |
4075 | struct var *vp; |
4076 | /* moved to G to reduce stack usage |
4077 | char var_name[LINELIM]; |
4078 | char alt_value[LINELIM]; |
4079 | */ |
4080 | #define var_name (G.grave__var_name) |
4081 | #define alt_value (G.grave__alt_value) |
4082 | int var_index = 0; |
4083 | int alt_index = 0; |
4084 | char operator = 0; |
4085 | int braces = 0; |
4086 | char *value; |
4087 | |
4088 | src++; |
4089 | if (*src == '{') { |
4090 | braces = 1; |
4091 | src++; |
4092 | } |
4093 | |
4094 | var_name[var_index++] = *src++; |
4095 | while (isalnum(*src) || *src=='_') |
4096 | var_name[var_index++] = *src++; |
4097 | var_name[var_index] = 0; |
4098 | |
4099 | if (braces) { |
4100 | switch (*src) { |
4101 | case '}': |
4102 | break; |
4103 | case '-': |
4104 | case '=': |
4105 | case '+': |
4106 | case '?': |
4107 | operator = * src; |
4108 | break; |
4109 | default: |
4110 | err("unclosed ${\n"); |
4111 | return 0; |
4112 | } |
4113 | if (operator) { |
4114 | src++; |
4115 | while (*src && (*src != '}')) { |
4116 | alt_value[alt_index++] = *src++; |
4117 | } |
4118 | alt_value[alt_index] = 0; |
4119 | if (*src != '}') { |
4120 | err("unclosed ${\n"); |
4121 | return 0; |
4122 | } |
4123 | } |
4124 | src++; |
4125 | } |
4126 | |
4127 | if (isalpha(*var_name)) { |
4128 | /* let subshell handle it instead */ |
4129 | |
4130 | char *namep = var_name; |
4131 | |
4132 | *dest++ = '$'; |
4133 | if (braces) |
4134 | *dest++ = '{'; |
4135 | while (*namep) |
4136 | *dest++ = *namep++; |
4137 | if (operator) { |
4138 | char *altp = alt_value; |
4139 | *dest++ = operator; |
4140 | while (*altp) |
4141 | *dest++ = *altp++; |
4142 | } |
4143 | if (braces) |
4144 | *dest++ = '}'; |
4145 | |
4146 | wb = addword(lookup(var_name)->name, wb); |
4147 | } else { |
4148 | /* expand */ |
4149 | |
4150 | vp = lookup(var_name); |
4151 | if (vp->value != null) |
4152 | value = (operator == '+') ? |
4153 | alt_value : vp->value; |
4154 | else if (operator == '?') { |
4155 | err(alt_value); |
4156 | return 0; |
4157 | } else if (alt_index && (operator != '+')) { |
4158 | value = alt_value; |
4159 | if (operator == '=') |
4160 | setval(vp, value); |
4161 | } else |
4162 | continue; |
4163 | |
4164 | while (*value && (count < LINELIM)) { |
4165 | *dest++ = *value++; |
4166 | count++; |
4167 | } |
4168 | } |
4169 | #undef var_name |
4170 | #undef alt_value |
4171 | } else { |
4172 | *dest++ = *src++; |
4173 | count++; |
4174 | ignore_once = 0; |
4175 | } |
4176 | } |
4177 | *dest = '\0'; |
4178 | |
4179 | if (openpipe(pf) < 0) |
4180 | return 0; |
4181 | |
4182 | while ((i = vfork()) == -1 && errno == EAGAIN) |
4183 | continue; |
4184 | |
4185 | DBGPRINTF3(("GRAVE: i is %p\n", io)); |
4186 | |
4187 | if (i < 0) { |
4188 | closepipe(pf); |
4189 | err((char *) bb_msg_memory_exhausted); |
4190 | return 0; |
4191 | } |
4192 | if (i != 0) { |
4193 | waitpid(i, NULL, 0); // safe_waitpid? |
4194 | global_env.iop->argp->aword = ++cp; |
4195 | close(pf[1]); |
4196 | PUSHIO(afile, remap(pf[0]), |
4197 | (int (*)(struct ioarg *)) ((quoted) ? qgravechar : gravechar)); |
4198 | return 1; |
4199 | } |
4200 | /* allow trapped signals */ |
4201 | /* XXX - Maybe this signal stuff should go as well? */ |
4202 | for (j = 0; j <= _NSIG; j++) |
4203 | if (ourtrap[j] && signal(j, SIG_IGN) != SIG_IGN) |
4204 | signal(j, SIG_DFL); |
4205 | |
4206 | /* Testcase where below checks are needed: |
4207 | * close stdout & run this script: |
4208 | * files=`ls` |
4209 | * echo "$files" >zz |
4210 | */ |
4211 | xmove_fd(pf[1], 1); |
4212 | if (pf[0] != 1) |
4213 | close(pf[0]); |
4214 | |
4215 | argument_list[0] = (char *) DEFAULT_SHELL; |
4216 | argument_list[1] = (char *) "-c"; |
4217 | argument_list[2] = child_cmd; |
4218 | argument_list[3] = NULL; |
4219 | |
4220 | cp = rexecve(argument_list[0], argument_list, makenv(1, wb)); |
4221 | prs(argument_list[0]); |
4222 | prs(": "); |
4223 | err(cp); |
4224 | _exit(EXIT_FAILURE); |
4225 | } |
4226 | |
4227 | |
4228 | static char *unquote(char *as) |
4229 | { |
4230 | char *s; |
4231 | |
4232 | s = as; |
4233 | if (s != NULL) |
4234 | while (*s) |
4235 | *s++ &= ~QUOTE; |
4236 | return as; |
4237 | } |
4238 | |
4239 | /* -------- glob.c -------- */ |
4240 | |
4241 | /* |
4242 | * glob |
4243 | */ |
4244 | |
4245 | #define scopy(x) strsave((x), areanum) |
4246 | #define BLKSIZ 512 |
4247 | #define NDENT ((BLKSIZ+sizeof(struct dirent)-1)/sizeof(struct dirent)) |
4248 | |
4249 | static struct wdblock *cl, *nl; |
4250 | static const char spcl[] ALIGN1= "[?*"; |
4251 | |
4252 | static struct wdblock *glob(char *cp, struct wdblock *wb) |
4253 | { |
4254 | int i; |
4255 | char *pp; |
4256 | |
4257 | if (cp == 0) |
4258 | return wb; |
4259 | i = 0; |
4260 | for (pp = cp; *pp; pp++) |
4261 | if (any(*pp, spcl)) |
4262 | i++; |
4263 | else if (!any(*pp & ~QUOTE, spcl)) |
4264 | *pp &= ~QUOTE; |
4265 | if (i != 0) { |
4266 | for (cl = addword(scopy(cp), NULL); anyspcl(cl); cl = nl) { |
4267 | nl = newword(cl->w_nword * 2); |
4268 | for (i = 0; i < cl->w_nword; i++) { /* for each argument */ |
4269 | for (pp = cl->w_words[i]; *pp; pp++) |
4270 | if (any(*pp, spcl)) { |
4271 | globname(cl->w_words[i], pp); |
4272 | break; |
4273 | } |
4274 | if (*pp == '\0') |
4275 | nl = addword(scopy(cl->w_words[i]), nl); |
4276 | } |
4277 | for (i = 0; i < cl->w_nword; i++) |
4278 | DELETE(cl->w_words[i]); |
4279 | DELETE(cl); |
4280 | } |
4281 | if (cl->w_nword) { |
4282 | for (i = 0; i < cl->w_nword; i++) |
4283 | unquote(cl->w_words[i]); |
4284 | qsort_string_vector(cl->w_words, cl->w_nword); |
4285 | for (i = 0; i < cl->w_nword; i++) |
4286 | wb = addword(cl->w_words[i], wb); |
4287 | DELETE(cl); |
4288 | return wb; |
4289 | } |
4290 | } |
4291 | wb = addword(unquote(cp), wb); |
4292 | return wb; |
4293 | } |
4294 | |
4295 | static void globname(char *we, char *pp) |
4296 | { |
4297 | char *np, *cp; |
4298 | char *name, *gp, *dp; |
4299 | int k; |
4300 | DIR *dirp; |
4301 | struct dirent *de; |
4302 | char dname[NAME_MAX + 1]; |
4303 | struct stat dbuf; |
4304 | |
4305 | for (np = we; np != pp; pp--) |
4306 | if (pp[-1] == '/') |
4307 | break; |
4308 | dp = cp = get_space((int) (pp - np) + 3); |
4309 | while (np < pp) |
4310 | *cp++ = *np++; |
4311 | *cp++ = '.'; |
4312 | *cp = '\0'; |
4313 | gp = cp = get_space(strlen(pp) + 1); |
4314 | while (*np && *np != '/') |
4315 | *cp++ = *np++; |
4316 | *cp = '\0'; |
4317 | dirp = opendir(dp); |
4318 | if (dirp == 0) { |
4319 | DELETE(dp); |
4320 | DELETE(gp); |
4321 | return; |
4322 | } |
4323 | dname[NAME_MAX] = '\0'; |
4324 | while ((de = readdir(dirp)) != NULL) { |
4325 | /* XXX Hmmm... What this could be? (abial) */ |
4326 | /* if (ent[j].d_ino == 0) continue; |
4327 | */ |
4328 | strncpy(dname, de->d_name, NAME_MAX); |
4329 | if (dname[0] == '.') |
4330 | if (*gp != '.') |
4331 | continue; |
4332 | for (k = 0; k < NAME_MAX; k++) |
4333 | if (any(dname[k], spcl)) |
4334 | dname[k] |= QUOTE; |
4335 | if (gmatch(dname, gp)) { |
4336 | name = generate(we, pp, dname, np); |
4337 | if (*np && !anys(np, spcl)) { |
4338 | if (stat(name, &dbuf)) { |
4339 | DELETE(name); |
4340 | continue; |
4341 | } |
4342 | } |
4343 | nl = addword(name, nl); |
4344 | } |
4345 | } |
4346 | closedir(dirp); |
4347 | DELETE(dp); |
4348 | DELETE(gp); |
4349 | } |
4350 | |
4351 | /* |
4352 | * generate a pathname as below. |
4353 | * start..end1 / middle end |
4354 | * the slashes come for free |
4355 | */ |
4356 | static char *generate(char *start1, char *end1, char *middle, char *end) |
4357 | { |
4358 | char *p; |
4359 | char *op, *xp; |
4360 | |
4361 | p = op = get_space((int)(end1 - start1) + strlen(middle) + strlen(end) + 2); |
4362 | xp = start1; |
4363 | while (xp != end1) |
4364 | *op++ = *xp++; |
4365 | xp = middle; |
4366 | while (*xp != '\0') |
4367 | *op++ = *xp++; |
4368 | strcpy(op, end); |
4369 | return p; |
4370 | } |
4371 | |
4372 | static int anyspcl(struct wdblock *wb) |
4373 | { |
4374 | int i; |
4375 | char **wd; |
4376 | |
4377 | wd = wb->w_words; |
4378 | for (i = 0; i < wb->w_nword; i++) |
4379 | if (anys(spcl, *wd++)) |
4380 | return 1; |
4381 | return 0; |
4382 | } |
4383 | |
4384 | |
4385 | /* -------- word.c -------- */ |
4386 | |
4387 | static struct wdblock *newword(int nw) |
4388 | { |
4389 | struct wdblock *wb; |
4390 | |
4391 | wb = get_space(sizeof(*wb) + nw * sizeof(char *)); |
4392 | wb->w_bsize = nw; |
4393 | wb->w_nword = 0; |
4394 | return wb; |
4395 | } |
4396 | |
4397 | static struct wdblock *addword(char *wd, struct wdblock *wb) |
4398 | { |
4399 | struct wdblock *wb2; |
4400 | int nw; |
4401 | |
4402 | if (wb == NULL) |
4403 | wb = newword(NSTART); |
4404 | nw = wb->w_nword; |
4405 | if (nw >= wb->w_bsize) { |
4406 | wb2 = newword(nw * 2); |
4407 | memcpy((char *) wb2->w_words, (char *) wb->w_words, |
4408 | nw * sizeof(char *)); |
4409 | wb2->w_nword = nw; |
4410 | DELETE(wb); |
4411 | wb = wb2; |
4412 | } |
4413 | wb->w_words[wb->w_nword++] = wd; |
4414 | return wb; |
4415 | } |
4416 | |
4417 | static char **getwords(struct wdblock *wb) |
4418 | { |
4419 | char **wd; |
4420 | int nb; |
4421 | |
4422 | if (wb == NULL) |
4423 | return NULL; |
4424 | if (wb->w_nword == 0) { |
4425 | DELETE(wb); |
4426 | return NULL; |
4427 | } |
4428 | nb = sizeof(*wd) * wb->w_nword; |
4429 | wd = get_space(nb); |
4430 | memcpy(wd, wb->w_words, nb); |
4431 | DELETE(wb); /* perhaps should done by caller */ |
4432 | return wd; |
4433 | } |
4434 | |
4435 | |
4436 | /* -------- io.c -------- */ |
4437 | |
4438 | /* |
4439 | * shell IO |
4440 | */ |
4441 | |
4442 | static int my_getc(int ec) |
4443 | { |
4444 | int c; |
4445 | |
4446 | if (global_env.linep > elinep) { |
4447 | while ((c = readc()) != '\n' && c) |
4448 | continue; |
4449 | err("input line too long"); |
4450 | gflg = 1; |
4451 | return c; |
4452 | } |
4453 | c = readc(); |
4454 | if ((ec != '\'') && (ec != '`') && (global_env.iop->task != XGRAVE)) { |
4455 | if (c == '\\') { |
4456 | c = readc(); |
4457 | if (c == '\n' && ec != '\"') |
4458 | return my_getc(ec); |
4459 | c |= QUOTE; |
4460 | } |
4461 | } |
4462 | return c; |
4463 | } |
4464 | |
4465 | static void unget(int c) |
4466 | { |
4467 | if (global_env.iop >= global_env.iobase) |
4468 | global_env.iop->peekc = c; |
4469 | } |
4470 | |
4471 | static int eofc(void) |
4472 | { |
4473 | return global_env.iop < global_env.iobase || (global_env.iop->peekc == 0 && global_env.iop->prev == 0); |
4474 | } |
4475 | |
4476 | static int readc(void) |
4477 | { |
4478 | int c; |
4479 | |
4480 | RCPRINTF(("READC: global_env.iop %p, global_env.iobase %p\n", global_env.iop, global_env.iobase)); |
4481 | |
4482 | for (; global_env.iop >= global_env.iobase; global_env.iop--) { |
4483 | RCPRINTF(("READC: global_env.iop %p, peekc 0x%x\n", global_env.iop, global_env.iop->peekc)); |
4484 | c = global_env.iop->peekc; |
4485 | if (c != '\0') { |
4486 | global_env.iop->peekc = 0; |
4487 | return c; |
4488 | } |
4489 | if (global_env.iop->prev != 0) { |
4490 | c = (*global_env.iop->iofn)(global_env.iop->argp, global_env.iop); |
4491 | if (c != '\0') { |
4492 | if (c == -1) { |
4493 | global_env.iop++; |
4494 | continue; |
4495 | } |
4496 | if (global_env.iop == iostack) |
4497 | ioecho(c); |
4498 | global_env.iop->prev = c; |
4499 | return c; |
4500 | } |
4501 | if (global_env.iop->task == XIO && global_env.iop->prev != '\n') { |
4502 | global_env.iop->prev = 0; |
4503 | if (global_env.iop == iostack) |
4504 | ioecho('\n'); |
4505 | return '\n'; |
4506 | } |
4507 | } |
4508 | if (global_env.iop->task == XIO) { |
4509 | if (multiline) { |
4510 | global_env.iop->prev = 0; |
4511 | return 0; |
4512 | } |
4513 | if (interactive && global_env.iop == iostack + 1) { |
4514 | #if ENABLE_FEATURE_EDITING |
4515 | current_prompt = prompt->value; |
4516 | #else |
4517 | prs(prompt->value); |
4518 | #endif |
4519 | } |
4520 | } |
4521 | } /* FOR */ |
4522 | |
4523 | if (global_env.iop >= iostack) { |
4524 | RCPRINTF(("READC: return 0, global_env.iop %p\n", global_env.iop)); |
4525 | return 0; |
4526 | } |
4527 | |
4528 | DBGPRINTF(("READC: leave()...\n")); |
4529 | leave(); |
4530 | /* NOTREACHED */ |
4531 | return 0; |
4532 | } |
4533 | |
4534 | static void ioecho(char c) |
4535 | { |
4536 | if (FLAG['v']) |
4537 | write(STDERR_FILENO, &c, sizeof c); |
4538 | } |
4539 | |
4540 | static void pushio(struct ioarg *argp, int (*fn) (struct ioarg *)) |
4541 | { |
4542 | DBGPRINTF(("PUSHIO: argp %p, argp->afid 0x%x, global_env.iop %p\n", argp, |
4543 | argp->afid, global_env.iop)); |
4544 | |
4545 | /* Set env ptr for io source to next array spot and check for array overflow */ |
4546 | if (++global_env.iop >= &iostack[NPUSH]) { |
4547 | global_env.iop--; |
4548 | err("Shell input nested too deeply"); |
4549 | gflg = 1; |
4550 | return; |
4551 | } |
4552 | |
4553 | /* We did not overflow the NPUSH array spots so setup data structs */ |
4554 | |
4555 | global_env.iop->iofn = (int (*)(struct ioarg *, struct io *)) fn; /* Store data source func ptr */ |
4556 | |
4557 | if (argp->afid != AFID_NOBUF) |
4558 | global_env.iop->argp = argp; |
4559 | else { |
4560 | |
4561 | global_env.iop->argp = ioargstack + (global_env.iop - iostack); /* MAL - index into stack */ |
4562 | *global_env.iop->argp = *argp; /* copy data from temp area into stack spot */ |
4563 | |
4564 | /* MAL - mainbuf is for 1st data source (command line?) and all nested use a single shared buffer? */ |
4565 | |
4566 | if (global_env.iop == &iostack[0]) |
4567 | global_env.iop->argp->afbuf = &mainbuf; |
4568 | else |
4569 | global_env.iop->argp->afbuf = &sharedbuf; |
4570 | |
4571 | /* MAL - if not a termimal AND (commandline OR readable file) then give it a buffer id? */ |
4572 | /* This line appears to be active when running scripts from command line */ |
4573 | if ((isatty(global_env.iop->argp->afile) == 0) |
4574 | && (global_env.iop == &iostack[0] |
4575 | || lseek(global_env.iop->argp->afile, 0L, SEEK_CUR) != -1)) { |
4576 | if (++bufid == AFID_NOBUF) /* counter rollover check, AFID_NOBUF = 11111111 */ |
4577 | bufid = AFID_ID; /* AFID_ID = 0 */ |
4578 | |
4579 | global_env.iop->argp->afid = bufid; /* assign buffer id */ |
4580 | } |
4581 | |
4582 | DBGPRINTF(("PUSHIO: iostack %p, global_env.iop %p, afbuf %p\n", |
4583 | iostack, global_env.iop, global_env.iop->argp->afbuf)); |
4584 | DBGPRINTF(("PUSHIO: mbuf %p, sbuf %p, bid %d, global_env.iop %p\n", |
4585 | &mainbuf, &sharedbuf, bufid, global_env.iop)); |
4586 | |
4587 | } |
4588 | |
4589 | global_env.iop->prev = ~'\n'; |
4590 | global_env.iop->peekc = 0; |
4591 | global_env.iop->xchar = 0; |
4592 | global_env.iop->nlcount = 0; |
4593 | |
4594 | if (fn == filechar || fn == linechar) |
4595 | global_env.iop->task = XIO; |
4596 | else if (fn == (int (*)(struct ioarg *)) gravechar |
4597 | || fn == (int (*)(struct ioarg *)) qgravechar) |
4598 | global_env.iop->task = XGRAVE; |
4599 | else |
4600 | global_env.iop->task = XOTHER; |
4601 | } |
4602 | |
4603 | static struct io *setbase(struct io *ip) |
4604 | { |
4605 | struct io *xp; |
4606 | |
4607 | xp = global_env.iobase; |
4608 | global_env.iobase = ip; |
4609 | return xp; |
4610 | } |
4611 | |
4612 | /* |
4613 | * Input generating functions |
4614 | */ |
4615 | |
4616 | /* |
4617 | * Produce the characters of a string, then a newline, then NUL. |
4618 | */ |
4619 | static int nlchar(struct ioarg *ap) |
4620 | { |
4621 | char c; |
4622 | |
4623 | if (ap->aword == NULL) |
4624 | return '\0'; |
4625 | c = *ap->aword++; |
4626 | if (c == '\0') { |
4627 | ap->aword = NULL; |
4628 | return '\n'; |
4629 | } |
4630 | return c; |
4631 | } |
4632 | |
4633 | /* |
4634 | * Given a list of words, produce the characters |
4635 | * in them, with a space after each word. |
4636 | */ |
4637 | static int wdchar(struct ioarg *ap) |
4638 | { |
4639 | char c; |
4640 | char **wl; |
4641 | |
4642 | wl = ap->awordlist; |
4643 | if (wl == NULL) |
4644 | return 0; |
4645 | if (*wl != NULL) { |
4646 | c = *(*wl)++; |
4647 | if (c != 0) |
4648 | return c & 0177; |
4649 | ap->awordlist++; |
4650 | return ' '; |
4651 | } |
4652 | ap->awordlist = NULL; |
4653 | return '\n'; |
4654 | } |
4655 | |
4656 | /* |
4657 | * Return the characters of a list of words, |
4658 | * producing a space between them. |
4659 | */ |
4660 | static int dolchar(struct ioarg *ap) |
4661 | { |
4662 | char *wp; |
4663 | |
4664 | wp = *ap->awordlist++; |
4665 | if (wp != NULL) { |
4666 | PUSHIO(aword, wp, *ap->awordlist == NULL ? strchar : xxchar); |
4667 | return -1; |
4668 | } |
4669 | return 0; |
4670 | } |
4671 | |
4672 | static int xxchar(struct ioarg *ap) |
4673 | { |
4674 | int c; |
4675 | |
4676 | if (ap->aword == NULL) |
4677 | return 0; |
4678 | c = *ap->aword++; |
4679 | if (c == '\0') { |
4680 | ap->aword = NULL; |
4681 | return ' '; |
4682 | } |
4683 | return c; |
4684 | } |
4685 | |
4686 | /* |
4687 | * Produce the characters from a single word (string). |
4688 | */ |
4689 | static int strchar(struct ioarg *ap) |
4690 | { |
4691 | if (ap->aword == NULL) |
4692 | return 0; |
4693 | return *ap->aword++; |
4694 | } |
4695 | |
4696 | /* |
4697 | * Produce quoted characters from a single word (string). |
4698 | */ |
4699 | static int qstrchar(struct ioarg *ap) |
4700 | { |
4701 | int c; |
4702 | |
4703 | if (ap->aword == NULL) |
4704 | return 0; |
4705 | c = *ap->aword++; |
4706 | if (c) |
4707 | c |= QUOTE; |
4708 | return c; |
4709 | } |
4710 | |
4711 | /* |
4712 | * Return the characters from a file. |
4713 | */ |
4714 | static int filechar(struct ioarg *ap) |
4715 | { |
4716 | int i; |
4717 | char c; |
4718 | struct iobuf *bp = ap->afbuf; |
4719 | |
4720 | if (ap->afid != AFID_NOBUF) { |
4721 | i = (ap->afid != bp->id); |
4722 | if (i || bp->bufp == bp->ebufp) { |
4723 | if (i) |
4724 | lseek(ap->afile, ap->afpos, SEEK_SET); |
4725 | |
4726 | i = nonblock_safe_read(ap->afile, bp->buf, sizeof(bp->buf)); |
4727 | if (i <= 0) { |
4728 | closef(ap->afile); |
4729 | return 0; |
4730 | } |
4731 | |
4732 | bp->id = ap->afid; |
4733 | bp->bufp = bp->buf; |
4734 | bp->ebufp = bp->bufp + i; |
4735 | } |
4736 | |
4737 | ap->afpos++; |
4738 | return *bp->bufp++ & 0177; |
4739 | } |
4740 | #if ENABLE_FEATURE_EDITING |
4741 | if (interactive && isatty(ap->afile)) { |
4742 | /* moved to G: static char filechar_cmdbuf[BUFSIZ]; */ |
4743 | static int position = 0, size = 0; |
4744 | |
4745 | while (size == 0 || position >= size) { |
4746 | size = read_line_input(current_prompt, filechar_cmdbuf, BUFSIZ, line_input_state); |
4747 | if (size < 0) /* Error/EOF */ |
4748 | exit(EXIT_SUCCESS); |
4749 | position = 0; |
4750 | /* if Ctrl-C, size == 0 and loop will repeat */ |
4751 | } |
4752 | c = filechar_cmdbuf[position]; |
4753 | position++; |
4754 | return c; |
4755 | } |
4756 | #endif |
4757 | i = nonblock_safe_read(ap->afile, &c, sizeof(c)); |
4758 | return i == sizeof(c) ? (c & 0x7f) : (closef(ap->afile), 0); |
4759 | } |
4760 | |
4761 | /* |
4762 | * Return the characters from a here temp file. |
4763 | */ |
4764 | static int herechar(struct ioarg *ap) |
4765 | { |
4766 | char c; |
4767 | |
4768 | if (nonblock_safe_read(ap->afile, &c, sizeof(c)) != sizeof(c)) { |
4769 | close(ap->afile); |
4770 | c = '\0'; |
4771 | } |
4772 | return c; |
4773 | } |
4774 | |
4775 | /* |
4776 | * Return the characters produced by a process (`...`). |
4777 | * Quote them if required, and remove any trailing newline characters. |
4778 | */ |
4779 | static int gravechar(struct ioarg *ap, struct io *iop) |
4780 | { |
4781 | int c; |
4782 | |
4783 | c = qgravechar(ap, iop) & ~QUOTE; |
4784 | if (c == '\n') |
4785 | c = ' '; |
4786 | return c; |
4787 | } |
4788 | |
4789 | static int qgravechar(struct ioarg *ap, struct io *iop) |
4790 | { |
4791 | int c; |
4792 | |
4793 | DBGPRINTF3(("QGRAVECHAR: enter, ap=%p, iop=%p\n", ap, iop)); |
4794 | |
4795 | if (iop->xchar) { |
4796 | if (iop->nlcount) { |
4797 | iop->nlcount--; |
4798 | return '\n' | QUOTE; |
4799 | } |
4800 | c = iop->xchar; |
4801 | iop->xchar = 0; |
4802 | } else if ((c = filechar(ap)) == '\n') { |
4803 | iop->nlcount = 1; |
4804 | while ((c = filechar(ap)) == '\n') |
4805 | iop->nlcount++; |
4806 | iop->xchar = c; |
4807 | if (c == 0) |
4808 | return c; |
4809 | iop->nlcount--; |
4810 | c = '\n'; |
4811 | } |
4812 | return c != 0 ? c | QUOTE : 0; |
4813 | } |
4814 | |
4815 | /* |
4816 | * Return a single command (usually the first line) from a file. |
4817 | */ |
4818 | static int linechar(struct ioarg *ap) |
4819 | { |
4820 | int c; |
4821 | |
4822 | c = filechar(ap); |
4823 | if (c == '\n') { |
4824 | if (!multiline) { |
4825 | closef(ap->afile); |
4826 | ap->afile = -1; /* illegal value */ |
4827 | } |
4828 | } |
4829 | return c; |
4830 | } |
4831 | |
4832 | /* |
4833 | * Remap fd into shell's fd space |
4834 | */ |
4835 | static int remap(int fd) |
4836 | { |
4837 | int i; |
4838 | int map[NOFILE]; |
4839 | int newfd; |
4840 | |
4841 | DBGPRINTF(("REMAP: fd=%d, global_env.iofd=%d\n", fd, global_env.iofd)); |
4842 | |
4843 | if (fd < global_env.iofd) { |
4844 | for (i = 0; i < NOFILE; i++) |
4845 | map[i] = 0; |
4846 | |
4847 | do { |
4848 | map[fd] = 1; |
4849 | newfd = dup(fd); |
4850 | fd = newfd; |
4851 | } while (fd >= 0 && fd < global_env.iofd); |
4852 | |
4853 | for (i = 0; i < NOFILE; i++) |
4854 | if (map[i]) |
4855 | close(i); |
4856 | |
4857 | if (fd < 0) |
4858 | err("too many files open in shell"); |
4859 | } |
4860 | |
4861 | return fd; |
4862 | } |
4863 | |
4864 | static int openpipe(int *pv) |
4865 | { |
4866 | int i; |
4867 | |
4868 | i = pipe(pv); |
4869 | if (i < 0) |
4870 | err("can't create pipe - try again"); |
4871 | return i; |
4872 | } |
4873 | |
4874 | static void closepipe(int *pv) |
4875 | { |
4876 | if (pv != NULL) { |
4877 | close(pv[0]); |
4878 | close(pv[1]); |
4879 | } |
4880 | } |
4881 | |
4882 | |
4883 | /* -------- here.c -------- */ |
4884 | |
4885 | /* |
4886 | * here documents |
4887 | */ |
4888 | |
4889 | static void markhere(char *s, struct ioword *iop) |
4890 | { |
4891 | struct here *h, *lh; |
4892 | |
4893 | DBGPRINTF7(("MARKHERE: enter, s=%p\n", s)); |
4894 | |
4895 | h = get_space(sizeof(struct here)); |
4896 | if (h == NULL) |
4897 | return; |
4898 | |
4899 | h->h_tag = evalstr(s, DOSUB); |
4900 | if (h->h_tag == 0) |
4901 | return; |
4902 | |
4903 | h->h_iop = iop; |
4904 | iop->io_name = 0; |
4905 | h->h_next = NULL; |
4906 | if (inhere == 0) |
4907 | inhere = h; |
4908 | else { |
4909 | for (lh = inhere; lh != NULL; lh = lh->h_next) { |
4910 | if (lh->h_next == 0) { |
4911 | lh->h_next = h; |
4912 | break; |
4913 | } |
4914 | } |
4915 | } |
4916 | iop->io_flag |= IOHERE | IOXHERE; |
4917 | for (s = h->h_tag; *s; s++) { |
4918 | if (*s & QUOTE) { |
4919 | iop->io_flag &= ~IOXHERE; |
4920 | *s &= ~QUOTE; |
4921 | } |
4922 | } |
4923 | h->h_dosub = ((iop->io_flag & IOXHERE) ? '\0' : '\''); |
4924 | } |
4925 | |
4926 | static void gethere(void) |
4927 | { |
4928 | struct here *h, *hp; |
4929 | |
4930 | DBGPRINTF7(("GETHERE: enter...\n")); |
4931 | |
4932 | /* Scan here files first leaving inhere list in place */ |
4933 | for (hp = h = inhere; h != NULL; hp = h, h = h->h_next) |
4934 | readhere(&h->h_iop->io_name, h->h_tag, h->h_dosub /* NUL or ' */); |
4935 | |
4936 | /* Make inhere list active - keep list intact for scraphere */ |
4937 | if (hp != NULL) { |
4938 | hp->h_next = acthere; |
4939 | acthere = inhere; |
4940 | inhere = NULL; |
4941 | } |
4942 | } |
4943 | |
4944 | static void readhere(char **name, char *s, int ec) |
4945 | { |
4946 | int tf; |
4947 | char tname[30] = ".msh_XXXXXX"; |
4948 | int c; |
4949 | jmp_buf ev; |
4950 | char myline[LINELIM + 1]; |
4951 | char *thenext; |
4952 | |
4953 | DBGPRINTF7(("READHERE: enter, name=%p, s=%p\n", name, s)); |
4954 | |
4955 | tf = mkstemp(tname); |
4956 | if (tf < 0) |
4957 | return; |
4958 | |
4959 | *name = strsave(tname, areanum); |
4960 | errpt = ev; |
4961 | if (newenv(setjmp(errpt)) != 0) |
4962 | unlink(tname); |
4963 | else { |
4964 | pushio(global_env.iop->argp, (int (*)(struct ioarg *)) global_env.iop->iofn); |
4965 | global_env.iobase = global_env.iop; |
4966 | for (;;) { |
4967 | if (interactive && global_env.iop <= iostack) { |
4968 | #if ENABLE_FEATURE_EDITING |
4969 | current_prompt = cprompt->value; |
4970 | #else |
4971 | prs(cprompt->value); |
4972 | #endif |
4973 | } |
4974 | thenext = myline; |
4975 | while ((c = my_getc(ec)) != '\n' && c) { |
4976 | if (ec == '\'') |
4977 | c &= ~QUOTE; |
4978 | if (thenext >= &myline[LINELIM]) { |
4979 | c = 0; |
4980 | break; |
4981 | } |
4982 | *thenext++ = c; |
4983 | } |
4984 | *thenext = 0; |
4985 | if (strcmp(s, myline) == 0 || c == 0) |
4986 | break; |
4987 | *thenext++ = '\n'; |
4988 | write(tf, myline, (int) (thenext - myline)); |
4989 | } |
4990 | if (c == 0) { |
4991 | prs("here document `"); |
4992 | prs(s); |
4993 | err("' unclosed"); |
4994 | } |
4995 | quitenv(); |
4996 | } |
4997 | close(tf); |
4998 | } |
4999 | |
5000 | /* |
5001 | * open here temp file. |
5002 | * if unquoted here, expand here temp file into second temp file. |
5003 | */ |
5004 | static int herein(char *hname, int xdoll) |
5005 | { |
5006 | int hf; |
5007 | int tf; |
5008 | |
5009 | #if __GNUC__ |
5010 | /* Avoid longjmp clobbering */ |
5011 | (void) &tf; |
5012 | #endif |
5013 | if (hname == NULL) |
5014 | return -1; |
5015 | |
5016 | DBGPRINTF7(("HEREIN: hname is %s, xdoll=%d\n", hname, xdoll)); |
5017 | |
5018 | hf = open(hname, O_RDONLY); |
5019 | if (hf < 0) |
5020 | return -1; |
5021 | |
5022 | if (xdoll) { |
5023 | char c; |
5024 | char tname[30] = ".msh_XXXXXX"; |
5025 | jmp_buf ev; |
5026 | |
5027 | tf = mkstemp(tname); |
5028 | if (tf < 0) |
5029 | return -1; |
5030 | errpt = ev; |
5031 | if (newenv(setjmp(errpt)) == 0) { |
5032 | PUSHIO(afile, hf, herechar); |
5033 | setbase(global_env.iop); |
5034 | while ((c = subgetc(0, 0)) != 0) { |
5035 | c &= ~QUOTE; |
5036 | write(tf, &c, sizeof c); |
5037 | } |
5038 | quitenv(); |
5039 | } else |
5040 | unlink(tname); |
5041 | close(tf); |
5042 | tf = open(tname, O_RDONLY); |
5043 | unlink(tname); |
5044 | return tf; |
5045 | } |
5046 | return hf; |
5047 | } |
5048 | |
5049 | static void scraphere(void) |
5050 | { |
5051 | struct here *h; |
5052 | |
5053 | DBGPRINTF7(("SCRAPHERE: enter...\n")); |
5054 | |
5055 | for (h = inhere; h != NULL; h = h->h_next) { |
5056 | if (h->h_iop && h->h_iop->io_name) |
5057 | unlink(h->h_iop->io_name); |
5058 | } |
5059 | inhere = NULL; |
5060 | } |
5061 | |
5062 | /* unlink here temp files before a freearea(area) */ |
5063 | static void freehere(int area) |
5064 | { |
5065 | struct here *h, *hl; |
5066 | |
5067 | DBGPRINTF6(("FREEHERE: enter, area=%d\n", area)); |
5068 | |
5069 | hl = NULL; |
5070 | for (h = acthere; h != NULL; h = h->h_next) { |
5071 | if (getarea((char *) h) >= area) { |
5072 | if (h->h_iop->io_name != NULL) |
5073 | unlink(h->h_iop->io_name); |
5074 | if (hl == NULL) |
5075 | acthere = h->h_next; |
5076 | else |
5077 | hl->h_next = h->h_next; |
5078 | } else { |
5079 | hl = h; |
5080 | } |
5081 | } |
5082 | } |
5083 | |
5084 | |
5085 | /* -------- sh.c -------- */ |
5086 | /* |
5087 | * shell |
5088 | */ |
5089 | |
5090 | int msh_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
5091 | int msh_main(int argc, char **argv) |
5092 | { |
5093 | int f; |
5094 | char *s; |
5095 | int cflag; |
5096 | char *name, **ap; |
5097 | int (*iof) (struct ioarg *); |
5098 | |
5099 | INIT_G(); |
5100 | |
5101 | sharedbuf.id = AFID_NOBUF; |
5102 | mainbuf.id = AFID_NOBUF; |
5103 | elinep = line + sizeof(line) - 5; |
5104 | |
5105 | #if ENABLE_FEATURE_EDITING |
5106 | line_input_state = new_line_input_t(FOR_SHELL); |
5107 | #endif |
5108 | |
5109 | DBGPRINTF(("MSH_MAIN: argc %d, environ %p\n", argc, environ)); |
5110 | |
5111 | initarea(); |
5112 | ap = environ; |
5113 | if (ap != NULL) { |
5114 | while (*ap) |
5115 | assign(*ap++, !COPYV); |
5116 | for (ap = environ; *ap;) |
5117 | export(lookup(*ap++)); |
5118 | } |
5119 | closeall(); |
5120 | areanum = 1; |
5121 | |
5122 | shell = lookup("SHELL"); |
5123 | if (shell->value == null) |
5124 | setval(shell, (char *)DEFAULT_SHELL); |
5125 | export(shell); |
5126 | |
5127 | homedir = lookup("HOME"); |
5128 | if (homedir->value == null) |
5129 | setval(homedir, "/"); |
5130 | export(homedir); |
5131 | |
5132 | setval(lookup("$"), putn(getpid())); |
5133 | |
5134 | path = lookup("PATH"); |
5135 | if (path->value == null) { |
5136 | /* Can be merged with same string elsewhere in bbox */ |
5137 | if (geteuid() == 0) |
5138 | setval(path, bb_default_root_path); |
5139 | else |
5140 | setval(path, bb_default_path); |
5141 | } |
5142 | export(path); |
5143 | |
5144 | ifs = lookup("IFS"); |
5145 | if (ifs->value == null) |
5146 | setval(ifs, " \t\n"); |
5147 | |
5148 | #ifdef MSHDEBUG |
5149 | mshdbg_var = lookup("MSHDEBUG"); |
5150 | if (mshdbg_var->value == null) |
5151 | setval(mshdbg_var, "0"); |
5152 | #endif |
5153 | |
5154 | prompt = lookup("PS1"); |
5155 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT |
5156 | if (prompt->value == null) |
5157 | #endif |
5158 | setval(prompt, DEFAULT_USER_PROMPT); |
5159 | if (geteuid() == 0) { |
5160 | setval(prompt, DEFAULT_ROOT_PROMPT); |
5161 | prompt->status &= ~EXPORT; |
5162 | } |
5163 | cprompt = lookup("PS2"); |
5164 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT |
5165 | if (cprompt->value == null) |
5166 | #endif |
5167 | setval(cprompt, "> "); |
5168 | |
5169 | iof = filechar; |
5170 | cflag = 0; |
5171 | name = *argv++; |
5172 | if (--argc >= 1) { |
5173 | if (argv[0][0] == '-' && argv[0][1] != '\0') { |
5174 | for (s = argv[0] + 1; *s; s++) |
5175 | switch (*s) { |
5176 | case 'c': |
5177 | prompt->status &= ~EXPORT; |
5178 | cprompt->status &= ~EXPORT; |
5179 | setval(prompt, ""); |
5180 | setval(cprompt, ""); |
5181 | cflag = 1; |
5182 | if (--argc > 0) |
5183 | PUSHIO(aword, *++argv, iof = nlchar); |
5184 | break; |
5185 | |
5186 | case 'q': |
5187 | qflag = SIG_DFL; |
5188 | break; |
5189 | |
5190 | case 's': |
5191 | /* standard input */ |
5192 | break; |
5193 | |
5194 | case 't': |
5195 | prompt->status &= ~EXPORT; |
5196 | setval(prompt, ""); |
5197 | iof = linechar; |
5198 | break; |
5199 | |
5200 | case 'i': |
5201 | interactive = 1; |
5202 | default: |
5203 | if (*s >= 'a' && *s <= 'z') |
5204 | FLAG[(int) *s]++; |
5205 | } |
5206 | } else { |
5207 | argv--; |
5208 | argc++; |
5209 | } |
5210 | |
5211 | if (iof == filechar && --argc > 0) { |
5212 | setval(prompt, ""); |
5213 | setval(cprompt, ""); |
5214 | prompt->status &= ~EXPORT; |
5215 | cprompt->status &= ~EXPORT; |
5216 | |
5217 | /* Shell is non-interactive, activate printf-based debug */ |
5218 | #ifdef MSHDEBUG |
5219 | mshdbg = mshdbg_var->value[0] - '0'; |
5220 | if (mshdbg < 0) |
5221 | mshdbg = 0; |
5222 | #endif |
5223 | DBGPRINTF(("MSH_MAIN: calling newfile()\n")); |
5224 | |
5225 | name = *++argv; |
5226 | if (newfile(name)) |
5227 | exit(EXIT_FAILURE); /* Exit on error */ |
5228 | } |
5229 | } |
5230 | |
5231 | setdash(); |
5232 | |
5233 | /* This won't be true if PUSHIO has been called, say from newfile() above */ |
5234 | if (global_env.iop < iostack) { |
5235 | PUSHIO(afile, 0, iof); |
5236 | if (isatty(0) && isatty(1) && !cflag) { |
5237 | interactive = 1; |
5238 | #if !ENABLE_FEATURE_SH_EXTRA_QUIET |
5239 | #ifdef MSHDEBUG |
5240 | printf("\n\n%s built-in shell (msh with debug)\n", bb_banner); |
5241 | #else |
5242 | printf("\n\n%s built-in shell (msh)\n", bb_banner); |
5243 | #endif |
5244 | printf("Enter 'help' for a list of built-in commands.\n\n"); |
5245 | #endif |
5246 | } |
5247 | } |
5248 | |
5249 | signal(SIGQUIT, qflag); |
5250 | if (name && name[0] == '-') { |
5251 | interactive = 1; |
5252 | f = open(".profile", O_RDONLY); |
5253 | if (f >= 0) |
5254 | next(remap(f)); |
5255 | f = open("/etc/profile", O_RDONLY); |
5256 | if (f >= 0) |
5257 | next(remap(f)); |
5258 | } |
5259 | if (interactive) |
5260 | signal(SIGTERM, sig); |
5261 | |
5262 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
5263 | signal(SIGINT, onintr); |
5264 | |
5265 | /* Handle "msh SCRIPT VAR=val params..." */ |
5266 | /* Disabled: bash does not do it! */ |
5267 | #if 0 |
5268 | argv++; |
5269 | /* skip leading args of the form VAR=val */ |
5270 | while (*argv && assign(*argv, !COPYV)) { |
5271 | argc--; |
5272 | argv++; |
5273 | } |
5274 | argv--; |
5275 | #endif |
5276 | dolv = argv; |
5277 | dolc = argc; |
5278 | dolv[0] = name; |
5279 | |
5280 | setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc)); |
5281 | |
5282 | DBGPRINTF(("MSH_MAIN: begin FOR loop, interactive %d, global_env.iop %p, iostack %p\n", interactive, global_env.iop, iostack)); |
5283 | |
5284 | for (;;) { |
5285 | if (interactive && global_env.iop <= iostack) { |
5286 | #if ENABLE_FEATURE_EDITING |
5287 | current_prompt = prompt->value; |
5288 | #else |
5289 | prs(prompt->value); |
5290 | #endif |
5291 | } |
5292 | onecommand(); |
5293 | /* Ensure that getenv("PATH") stays current */ |
5294 | setenv("PATH", path->value, 1); |
5295 | } |
5296 | |
5297 | DBGPRINTF(("MSH_MAIN: returning.\n")); |
5298 | } |
5299 | |
5300 | |
5301 | /* |
5302 | * Copyright (c) 1987,1997, Prentice Hall |
5303 | * All rights reserved. |
5304 | * |
5305 | * Redistribution and use of the MINIX operating system in source and |
5306 | * binary forms, with or without modification, are permitted provided |
5307 | * that the following conditions are met: |
5308 | * |
5309 | * Redistributions of source code must retain the above copyright |
5310 | * notice, this list of conditions and the following disclaimer. |
5311 | * |
5312 | * Redistributions in binary form must reproduce the above |
5313 | * copyright notice, this list of conditions and the following |
5314 | * disclaimer in the documentation and/or other materials provided |
5315 | * with the distribution. |
5316 | * |
5317 | * Neither the name of Prentice Hall nor the names of the software |
5318 | * authors or contributors may be used to endorse or promote |
5319 | * products derived from this software without specific prior |
5320 | * written permission. |
5321 | * |
5322 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND |
5323 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
5324 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
5325 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
5326 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE |
5327 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
5328 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
5329 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
5330 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
5331 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
5332 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
5333 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
5334 | * |
5335 | */ |