Contents of /tags/mkinitrd-6_3_1/busybox/findutils/find.c
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
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Thu Aug 19 12:44:27 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 35712 byte(s)
tagged 'mkinitrd-6_3_1'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini find implementation for busybox |
4 | * |
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * |
7 | * Reworked by David Douthitt <n9ubh@callsign.net> and |
8 | * Matt Kraai <kraai@alumni.carnegiemellon.edu>. |
9 | * |
10 | * Licensed under the GPL version 2, see the file LICENSE in this tarball. |
11 | */ |
12 | |
13 | /* findutils-4.1.20: |
14 | * |
15 | * # find file.txt -exec 'echo {}' '{} {}' ';' |
16 | * find: echo file.txt: No such file or directory |
17 | * # find file.txt -exec 'echo' '{} {}' '; ' |
18 | * find: missing argument to `-exec' |
19 | * # find file.txt -exec 'echo {}' '{} {}' ';' junk |
20 | * find: paths must precede expression |
21 | * # find file.txt -exec 'echo {}' '{} {}' ';' junk ';' |
22 | * find: paths must precede expression |
23 | * # find file.txt -exec 'echo' '{} {}' ';' |
24 | * file.txt file.txt |
25 | * (strace: execve("/bin/echo", ["echo", "file.txt file.txt"], [ 30 vars ])) |
26 | * # find file.txt -exec 'echo' '{} {}' ';' -print -exec pwd ';' |
27 | * file.txt file.txt |
28 | * file.txt |
29 | * /tmp |
30 | * # find -name '*.c' -o -name '*.h' |
31 | * [shows files, *.c and *.h intermixed] |
32 | * # find file.txt -name '*f*' -o -name '*t*' |
33 | * file.txt |
34 | * # find file.txt -name '*z*' -o -name '*t*' |
35 | * file.txt |
36 | * # find file.txt -name '*f*' -o -name '*z*' |
37 | * file.txt |
38 | * |
39 | * # find t z -name '*t*' -print -o -name '*z*' |
40 | * t |
41 | * # find t z t z -name '*t*' -o -name '*z*' -print |
42 | * z |
43 | * z |
44 | * # find t z t z '(' -name '*t*' -o -name '*z*' ')' -o -print |
45 | * (no output) |
46 | */ |
47 | |
48 | /* Testing script |
49 | * ./busybox find "$@" | tee /tmp/bb_find |
50 | * echo ================== |
51 | * /path/to/gnu/find "$@" | tee /tmp/std_find |
52 | * echo ================== |
53 | * diff -u /tmp/std_find /tmp/bb_find && echo Identical |
54 | */ |
55 | |
56 | //applet:IF_FIND(APPLET_NOEXEC(find, find, _BB_DIR_USR_BIN, _BB_SUID_DROP, find)) |
57 | |
58 | //kbuild:lib-$(CONFIG_FIND) += find.o |
59 | |
60 | //config:config FIND |
61 | //config: bool "find" |
62 | //config: default y |
63 | //config: help |
64 | //config: find is used to search your system to find specified files. |
65 | //config: |
66 | //config:config FEATURE_FIND_PRINT0 |
67 | //config: bool "Enable -print0: NUL-terminated output" |
68 | //config: default y |
69 | //config: depends on FIND |
70 | //config: help |
71 | //config: Causes output names to be separated by a NUL character |
72 | //config: rather than a newline. This allows names that contain |
73 | //config: newlines and other whitespace to be more easily |
74 | //config: interpreted by other programs. |
75 | //config: |
76 | //config:config FEATURE_FIND_MTIME |
77 | //config: bool "Enable -mtime: modified time matching" |
78 | //config: default y |
79 | //config: depends on FIND |
80 | //config: help |
81 | //config: Allow searching based on the modification time of |
82 | //config: files, in days. |
83 | //config: |
84 | //config:config FEATURE_FIND_MMIN |
85 | //config: bool "Enable -mmin: modified time matching by minutes" |
86 | //config: default y |
87 | //config: depends on FIND |
88 | //config: help |
89 | //config: Allow searching based on the modification time of |
90 | //config: files, in minutes. |
91 | //config: |
92 | //config:config FEATURE_FIND_PERM |
93 | //config: bool "Enable -perm: permissions matching" |
94 | //config: default y |
95 | //config: depends on FIND |
96 | //config: help |
97 | //config: Enable searching based on file permissions. |
98 | //config: |
99 | //config:config FEATURE_FIND_TYPE |
100 | //config: bool "Enable -type: file type matching (file/dir/link/...)" |
101 | //config: default y |
102 | //config: depends on FIND |
103 | //config: help |
104 | //config: Enable searching based on file type (file, |
105 | //config: directory, socket, device, etc.). |
106 | //config: |
107 | //config:config FEATURE_FIND_XDEV |
108 | //config: bool "Enable -xdev: 'stay in filesystem'" |
109 | //config: default y |
110 | //config: depends on FIND |
111 | //config: help |
112 | //config: This option allows find to restrict searches to a single filesystem. |
113 | //config: |
114 | //config:config FEATURE_FIND_MAXDEPTH |
115 | //config: bool "Enable -maxdepth N" |
116 | //config: default y |
117 | //config: depends on FIND |
118 | //config: help |
119 | //config: This option enables -maxdepth N option. |
120 | //config: |
121 | //config:config FEATURE_FIND_NEWER |
122 | //config: bool "Enable -newer: compare file modification times" |
123 | //config: default y |
124 | //config: depends on FIND |
125 | //config: help |
126 | //config: Support the 'find -newer' option for finding any files which have |
127 | //config: a modified time that is more recent than the specified FILE. |
128 | //config: |
129 | //config:config FEATURE_FIND_INUM |
130 | //config: bool "Enable -inum: inode number matching" |
131 | //config: default y |
132 | //config: depends on FIND |
133 | //config: help |
134 | //config: Support the 'find -inum' option for searching by inode number. |
135 | //config: |
136 | //config:config FEATURE_FIND_EXEC |
137 | //config: bool "Enable -exec: execute commands" |
138 | //config: default y |
139 | //config: depends on FIND |
140 | //config: help |
141 | //config: Support the 'find -exec' option for executing commands based upon |
142 | //config: the files matched. |
143 | //config: |
144 | //config:config FEATURE_FIND_USER |
145 | //config: bool "Enable -user: username/uid matching" |
146 | //config: default y |
147 | //config: depends on FIND |
148 | //config: help |
149 | //config: Support the 'find -user' option for searching by username or uid. |
150 | //config: |
151 | //config:config FEATURE_FIND_GROUP |
152 | //config: bool "Enable -group: group/gid matching" |
153 | //config: default y |
154 | //config: depends on FIND |
155 | //config: help |
156 | //config: Support the 'find -group' option for searching by group name or gid. |
157 | //config: |
158 | //config:config FEATURE_FIND_NOT |
159 | //config: bool "Enable the 'not' (!) operator" |
160 | //config: default y |
161 | //config: depends on FIND |
162 | //config: help |
163 | //config: Support the '!' operator to invert the test results. |
164 | //config: If 'Enable full-blown desktop' is enabled, then will also support |
165 | //config: the non-POSIX notation '-not'. |
166 | //config: |
167 | //config:config FEATURE_FIND_DEPTH |
168 | //config: bool "Enable -depth" |
169 | //config: default y |
170 | //config: depends on FIND |
171 | //config: help |
172 | //config: Process each directory's contents before the directory itself. |
173 | //config: |
174 | //config:config FEATURE_FIND_PAREN |
175 | //config: bool "Enable parens in options" |
176 | //config: default y |
177 | //config: depends on FIND |
178 | //config: help |
179 | //config: Enable usage of parens '(' to specify logical order of arguments. |
180 | //config: |
181 | //config:config FEATURE_FIND_SIZE |
182 | //config: bool "Enable -size: file size matching" |
183 | //config: default y |
184 | //config: depends on FIND |
185 | //config: help |
186 | //config: Support the 'find -size' option for searching by file size. |
187 | //config: |
188 | //config:config FEATURE_FIND_PRUNE |
189 | //config: bool "Enable -prune: exclude subdirectories" |
190 | //config: default y |
191 | //config: depends on FIND |
192 | //config: help |
193 | //config: If the file is a directory, dont descend into it. Useful for |
194 | //config: exclusion .svn and CVS directories. |
195 | //config: |
196 | //config:config FEATURE_FIND_DELETE |
197 | //config: bool "Enable -delete: delete files/dirs" |
198 | //config: default y |
199 | //config: depends on FIND && FEATURE_FIND_DEPTH |
200 | //config: help |
201 | //config: Support the 'find -delete' option for deleting files and directories. |
202 | //config: WARNING: This option can do much harm if used wrong. Busybox will not |
203 | //config: try to protect the user from doing stupid things. Use with care. |
204 | //config: |
205 | //config:config FEATURE_FIND_PATH |
206 | //config: bool "Enable -path: match pathname with shell pattern" |
207 | //config: default y |
208 | //config: depends on FIND |
209 | //config: help |
210 | //config: The -path option matches whole pathname instead of just filename. |
211 | //config: |
212 | //config:config FEATURE_FIND_REGEX |
213 | //config: bool "Enable -regex: match pathname with regex" |
214 | //config: default y |
215 | //config: depends on FIND |
216 | //config: help |
217 | //config: The -regex option matches whole pathname against regular expression. |
218 | //config: |
219 | //config:config FEATURE_FIND_CONTEXT |
220 | //config: bool "Enable -context: security context matching" |
221 | //config: default n |
222 | //config: depends on FIND && SELINUX |
223 | //config: help |
224 | //config: Support the 'find -context' option for matching security context. |
225 | //config: |
226 | //config:config FEATURE_FIND_LINKS |
227 | //config: bool "Enable -links: link count matching" |
228 | //config: default y |
229 | //config: depends on FIND |
230 | //config: help |
231 | //config: Support the 'find -links' option for matching number of links. |
232 | |
233 | #include <fnmatch.h> |
234 | #include "libbb.h" |
235 | #if ENABLE_FEATURE_FIND_REGEX |
236 | #include "xregex.h" |
237 | #endif |
238 | |
239 | /* This is a NOEXEC applet. Be very careful! */ |
240 | |
241 | |
242 | typedef int (*action_fp)(const char *fileName, const struct stat *statbuf, void *) FAST_FUNC; |
243 | |
244 | typedef struct { |
245 | action_fp f; |
246 | #if ENABLE_FEATURE_FIND_NOT |
247 | bool invert; |
248 | #endif |
249 | } action; |
250 | |
251 | #define ACTS(name, ...) typedef struct { action a; __VA_ARGS__ } action_##name; |
252 | #define ACTF(name) \ |
253 | static int FAST_FUNC func_##name(const char *fileName UNUSED_PARAM, \ |
254 | const struct stat *statbuf UNUSED_PARAM, \ |
255 | action_##name* ap UNUSED_PARAM) |
256 | |
257 | ACTS(print) |
258 | ACTS(name, const char *pattern; bool iname;) |
259 | IF_FEATURE_FIND_PATH( ACTS(path, const char *pattern;)) |
260 | IF_FEATURE_FIND_REGEX( ACTS(regex, regex_t compiled_pattern;)) |
261 | IF_FEATURE_FIND_PRINT0( ACTS(print0)) |
262 | IF_FEATURE_FIND_TYPE( ACTS(type, int type_mask;)) |
263 | IF_FEATURE_FIND_PERM( ACTS(perm, char perm_char; mode_t perm_mask;)) |
264 | IF_FEATURE_FIND_MTIME( ACTS(mtime, char mtime_char; unsigned mtime_days;)) |
265 | IF_FEATURE_FIND_MMIN( ACTS(mmin, char mmin_char; unsigned mmin_mins;)) |
266 | IF_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;)) |
267 | IF_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;)) |
268 | IF_FEATURE_FIND_USER( ACTS(user, uid_t uid;)) |
269 | IF_FEATURE_FIND_SIZE( ACTS(size, char size_char; off_t size;)) |
270 | IF_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;)) |
271 | IF_FEATURE_FIND_PAREN( ACTS(paren, action ***subexpr;)) |
272 | IF_FEATURE_FIND_PRUNE( ACTS(prune)) |
273 | IF_FEATURE_FIND_DELETE( ACTS(delete)) |
274 | IF_FEATURE_FIND_EXEC( ACTS(exec, char **exec_argv; unsigned *subst_count; int exec_argc;)) |
275 | IF_FEATURE_FIND_GROUP( ACTS(group, gid_t gid;)) |
276 | IF_FEATURE_FIND_LINKS( ACTS(links, char links_char; int links_count;)) |
277 | |
278 | struct globals { |
279 | IF_FEATURE_FIND_XDEV(dev_t *xdev_dev;) |
280 | IF_FEATURE_FIND_XDEV(int xdev_count;) |
281 | action ***actions; |
282 | bool need_print; |
283 | recurse_flags_t recurse_flags; |
284 | } FIX_ALIASING; |
285 | #define G (*(struct globals*)&bb_common_bufsiz1) |
286 | #define INIT_G() do { \ |
287 | struct G_sizecheck { \ |
288 | char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \ |
289 | }; \ |
290 | /* we have to zero it out because of NOEXEC */ \ |
291 | memset(&G, 0, offsetof(struct globals, need_print)); \ |
292 | G.need_print = 1; \ |
293 | G.recurse_flags = ACTION_RECURSE; \ |
294 | } while (0) |
295 | |
296 | #if ENABLE_FEATURE_FIND_EXEC |
297 | static unsigned count_subst(const char *str) |
298 | { |
299 | unsigned count = 0; |
300 | while ((str = strstr(str, "{}")) != NULL) { |
301 | count++; |
302 | str++; |
303 | } |
304 | return count; |
305 | } |
306 | |
307 | |
308 | static char* subst(const char *src, unsigned count, const char* filename) |
309 | { |
310 | char *buf, *dst, *end; |
311 | size_t flen = strlen(filename); |
312 | /* we replace each '{}' with filename: growth by strlen-2 */ |
313 | buf = dst = xmalloc(strlen(src) + count*(flen-2) + 1); |
314 | while ((end = strstr(src, "{}"))) { |
315 | memcpy(dst, src, end - src); |
316 | dst += end - src; |
317 | src = end + 2; |
318 | memcpy(dst, filename, flen); |
319 | dst += flen; |
320 | } |
321 | strcpy(dst, src); |
322 | return buf; |
323 | } |
324 | #endif |
325 | |
326 | /* Return values of ACTFs ('action functions') are a bit mask: |
327 | * bit 1=1: prune (use SKIP constant for setting it) |
328 | * bit 0=1: matched successfully (TRUE) |
329 | */ |
330 | |
331 | static int exec_actions(action ***appp, const char *fileName, const struct stat *statbuf) |
332 | { |
333 | int cur_group; |
334 | int cur_action; |
335 | int rc = 0; |
336 | action **app, *ap; |
337 | |
338 | /* "action group" is a set of actions ANDed together. |
339 | * groups are ORed together. |
340 | * We simply evaluate each group until we find one in which all actions |
341 | * succeed. */ |
342 | |
343 | /* -prune is special: if it is encountered, then we won't |
344 | * descend into current directory. It doesn't matter whether |
345 | * action group (in which -prune sits) will succeed or not: |
346 | * find * -prune -name 'f*' -o -name 'm*' -- prunes every dir |
347 | * find * -name 'f*' -o -prune -name 'm*' -- prunes all dirs |
348 | * not starting with 'f' */ |
349 | |
350 | /* We invert TRUE bit (bit 0). Now 1 there means 'failure'. |
351 | * and bitwise OR in "rc |= TRUE ^ ap->f()" will: |
352 | * (1) make SKIP (-prune) bit stick; and (2) detect 'failure'. |
353 | * On return, bit is restored. */ |
354 | |
355 | cur_group = -1; |
356 | while ((app = appp[++cur_group]) != NULL) { |
357 | rc &= ~TRUE; /* 'success' so far, clear TRUE bit */ |
358 | cur_action = -1; |
359 | while (1) { |
360 | ap = app[++cur_action]; |
361 | if (!ap) /* all actions in group were successful */ |
362 | return rc ^ TRUE; /* restore TRUE bit */ |
363 | rc |= TRUE ^ ap->f(fileName, statbuf, ap); |
364 | #if ENABLE_FEATURE_FIND_NOT |
365 | if (ap->invert) rc ^= TRUE; |
366 | #endif |
367 | if (rc & TRUE) /* current group failed, try next */ |
368 | break; |
369 | } |
370 | } |
371 | return rc ^ TRUE; /* restore TRUE bit */ |
372 | } |
373 | |
374 | |
375 | ACTF(name) |
376 | { |
377 | const char *tmp = bb_basename(fileName); |
378 | if (tmp != fileName && *tmp == '\0') { |
379 | /* "foo/bar/". Oh no... go back to 'b' */ |
380 | tmp--; |
381 | while (tmp != fileName && *--tmp != '/') |
382 | continue; |
383 | if (*tmp == '/') |
384 | tmp++; |
385 | } |
386 | /* Was using FNM_PERIOD flag too, |
387 | * but somewhere between 4.1.20 and 4.4.0 GNU find stopped using it. |
388 | * find -name '*foo' should match .foo too: |
389 | */ |
390 | return fnmatch(ap->pattern, tmp, (ap->iname ? FNM_CASEFOLD : 0)) == 0; |
391 | } |
392 | |
393 | #if ENABLE_FEATURE_FIND_PATH |
394 | ACTF(path) |
395 | { |
396 | return fnmatch(ap->pattern, fileName, 0) == 0; |
397 | } |
398 | #endif |
399 | #if ENABLE_FEATURE_FIND_REGEX |
400 | ACTF(regex) |
401 | { |
402 | regmatch_t match; |
403 | if (regexec(&ap->compiled_pattern, fileName, 1, &match, 0 /*eflags*/)) |
404 | return 0; /* no match */ |
405 | if (match.rm_so) |
406 | return 0; /* match doesn't start at pos 0 */ |
407 | if (fileName[match.rm_eo]) |
408 | return 0; /* match doesn't end exactly at end of pathname */ |
409 | return 1; |
410 | } |
411 | #endif |
412 | #if ENABLE_FEATURE_FIND_TYPE |
413 | ACTF(type) |
414 | { |
415 | return ((statbuf->st_mode & S_IFMT) == ap->type_mask); |
416 | } |
417 | #endif |
418 | #if ENABLE_FEATURE_FIND_PERM |
419 | ACTF(perm) |
420 | { |
421 | /* -perm +mode: at least one of perm_mask bits are set */ |
422 | if (ap->perm_char == '+') |
423 | return (statbuf->st_mode & ap->perm_mask) != 0; |
424 | /* -perm -mode: all of perm_mask are set */ |
425 | if (ap->perm_char == '-') |
426 | return (statbuf->st_mode & ap->perm_mask) == ap->perm_mask; |
427 | /* -perm mode: file mode must match perm_mask */ |
428 | return (statbuf->st_mode & 07777) == ap->perm_mask; |
429 | } |
430 | #endif |
431 | #if ENABLE_FEATURE_FIND_MTIME |
432 | ACTF(mtime) |
433 | { |
434 | time_t file_age = time(NULL) - statbuf->st_mtime; |
435 | time_t mtime_secs = ap->mtime_days * 24*60*60; |
436 | if (ap->mtime_char == '+') |
437 | return file_age >= mtime_secs + 24*60*60; |
438 | if (ap->mtime_char == '-') |
439 | return file_age < mtime_secs; |
440 | /* just numeric mtime */ |
441 | return file_age >= mtime_secs && file_age < (mtime_secs + 24*60*60); |
442 | } |
443 | #endif |
444 | #if ENABLE_FEATURE_FIND_MMIN |
445 | ACTF(mmin) |
446 | { |
447 | time_t file_age = time(NULL) - statbuf->st_mtime; |
448 | time_t mmin_secs = ap->mmin_mins * 60; |
449 | if (ap->mmin_char == '+') |
450 | return file_age >= mmin_secs + 60; |
451 | if (ap->mmin_char == '-') |
452 | return file_age < mmin_secs; |
453 | /* just numeric mmin */ |
454 | return file_age >= mmin_secs && file_age < (mmin_secs + 60); |
455 | } |
456 | #endif |
457 | #if ENABLE_FEATURE_FIND_NEWER |
458 | ACTF(newer) |
459 | { |
460 | return (ap->newer_mtime < statbuf->st_mtime); |
461 | } |
462 | #endif |
463 | #if ENABLE_FEATURE_FIND_INUM |
464 | ACTF(inum) |
465 | { |
466 | return (statbuf->st_ino == ap->inode_num); |
467 | } |
468 | #endif |
469 | #if ENABLE_FEATURE_FIND_EXEC |
470 | ACTF(exec) |
471 | { |
472 | int i, rc; |
473 | #if ENABLE_USE_PORTABLE_CODE |
474 | char **argv = alloca(sizeof(char*) * (ap->exec_argc + 1)); |
475 | #else /* gcc 4.3.1 generates smaller code: */ |
476 | char *argv[ap->exec_argc + 1]; |
477 | #endif |
478 | for (i = 0; i < ap->exec_argc; i++) |
479 | argv[i] = subst(ap->exec_argv[i], ap->subst_count[i], fileName); |
480 | argv[i] = NULL; /* terminate the list */ |
481 | |
482 | rc = spawn_and_wait(argv); |
483 | if (rc < 0) |
484 | bb_simple_perror_msg(argv[0]); |
485 | |
486 | i = 0; |
487 | while (argv[i]) |
488 | free(argv[i++]); |
489 | return rc == 0; /* return 1 if exitcode 0 */ |
490 | } |
491 | #endif |
492 | #if ENABLE_FEATURE_FIND_USER |
493 | ACTF(user) |
494 | { |
495 | return (statbuf->st_uid == ap->uid); |
496 | } |
497 | #endif |
498 | #if ENABLE_FEATURE_FIND_GROUP |
499 | ACTF(group) |
500 | { |
501 | return (statbuf->st_gid == ap->gid); |
502 | } |
503 | #endif |
504 | #if ENABLE_FEATURE_FIND_PRINT0 |
505 | ACTF(print0) |
506 | { |
507 | printf("%s%c", fileName, '\0'); |
508 | return TRUE; |
509 | } |
510 | #endif |
511 | ACTF(print) |
512 | { |
513 | puts(fileName); |
514 | return TRUE; |
515 | } |
516 | #if ENABLE_FEATURE_FIND_PAREN |
517 | ACTF(paren) |
518 | { |
519 | return exec_actions(ap->subexpr, fileName, statbuf); |
520 | } |
521 | #endif |
522 | #if ENABLE_FEATURE_FIND_SIZE |
523 | ACTF(size) |
524 | { |
525 | if (ap->size_char == '+') |
526 | return statbuf->st_size > ap->size; |
527 | if (ap->size_char == '-') |
528 | return statbuf->st_size < ap->size; |
529 | return statbuf->st_size == ap->size; |
530 | } |
531 | #endif |
532 | #if ENABLE_FEATURE_FIND_PRUNE |
533 | /* |
534 | * -prune: if -depth is not given, return true and do not descend |
535 | * current dir; if -depth is given, return false with no effect. |
536 | * Example: |
537 | * find dir -name 'asm-*' -prune -o -name '*.[chS]' -print |
538 | */ |
539 | ACTF(prune) |
540 | { |
541 | return SKIP + TRUE; |
542 | } |
543 | #endif |
544 | #if ENABLE_FEATURE_FIND_DELETE |
545 | ACTF(delete) |
546 | { |
547 | int rc; |
548 | if (S_ISDIR(statbuf->st_mode)) { |
549 | rc = rmdir(fileName); |
550 | } else { |
551 | rc = unlink(fileName); |
552 | } |
553 | if (rc < 0) |
554 | bb_simple_perror_msg(fileName); |
555 | return TRUE; |
556 | } |
557 | #endif |
558 | #if ENABLE_FEATURE_FIND_CONTEXT |
559 | ACTF(context) |
560 | { |
561 | security_context_t con; |
562 | int rc; |
563 | |
564 | if (G.recurse_flags & ACTION_FOLLOWLINKS) { |
565 | rc = getfilecon(fileName, &con); |
566 | } else { |
567 | rc = lgetfilecon(fileName, &con); |
568 | } |
569 | if (rc < 0) |
570 | return FALSE; |
571 | rc = strcmp(ap->context, con); |
572 | freecon(con); |
573 | return rc == 0; |
574 | } |
575 | #endif |
576 | #if ENABLE_FEATURE_FIND_LINKS |
577 | ACTF(links) |
578 | { |
579 | switch(ap->links_char) { |
580 | case '-' : return (statbuf->st_nlink < ap->links_count); |
581 | case '+' : return (statbuf->st_nlink > ap->links_count); |
582 | default: return (statbuf->st_nlink == ap->links_count); |
583 | } |
584 | } |
585 | #endif |
586 | |
587 | static int FAST_FUNC fileAction(const char *fileName, |
588 | struct stat *statbuf, |
589 | void *userData IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM), |
590 | int depth IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM)) |
591 | { |
592 | int r; |
593 | #if ENABLE_FEATURE_FIND_MAXDEPTH |
594 | #define minmaxdepth ((int*)userData) |
595 | |
596 | if (depth < minmaxdepth[0]) |
597 | return TRUE; /* skip this, continue recursing */ |
598 | if (depth > minmaxdepth[1]) |
599 | return SKIP; /* stop recursing */ |
600 | #endif |
601 | |
602 | r = exec_actions(G.actions, fileName, statbuf); |
603 | /* Had no explicit -print[0] or -exec? then print */ |
604 | if ((r & TRUE) && G.need_print) |
605 | puts(fileName); |
606 | |
607 | #if ENABLE_FEATURE_FIND_MAXDEPTH |
608 | if (S_ISDIR(statbuf->st_mode)) { |
609 | if (depth == minmaxdepth[1]) |
610 | return SKIP; |
611 | } |
612 | #endif |
613 | #if ENABLE_FEATURE_FIND_XDEV |
614 | /* -xdev stops on mountpoints, but AFTER mountpoit itself |
615 | * is processed as usual */ |
616 | if (S_ISDIR(statbuf->st_mode)) { |
617 | if (G.xdev_count) { |
618 | int i; |
619 | for (i = 0; i < G.xdev_count; i++) { |
620 | if (G.xdev_dev[i] == statbuf->st_dev) |
621 | goto found; |
622 | } |
623 | return SKIP; |
624 | found: ; |
625 | } |
626 | } |
627 | #endif |
628 | |
629 | /* Cannot return 0: our caller, recursive_action(), |
630 | * will perror() and skip dirs (if called on dir) */ |
631 | return (r & SKIP) ? SKIP : TRUE; |
632 | #undef minmaxdepth |
633 | } |
634 | |
635 | |
636 | #if ENABLE_FEATURE_FIND_TYPE |
637 | static int find_type(const char *type) |
638 | { |
639 | int mask = 0; |
640 | |
641 | if (*type == 'b') |
642 | mask = S_IFBLK; |
643 | else if (*type == 'c') |
644 | mask = S_IFCHR; |
645 | else if (*type == 'd') |
646 | mask = S_IFDIR; |
647 | else if (*type == 'p') |
648 | mask = S_IFIFO; |
649 | else if (*type == 'f') |
650 | mask = S_IFREG; |
651 | else if (*type == 'l') |
652 | mask = S_IFLNK; |
653 | else if (*type == 's') |
654 | mask = S_IFSOCK; |
655 | |
656 | if (mask == 0 || type[1] != '\0') |
657 | bb_error_msg_and_die(bb_msg_invalid_arg, type, "-type"); |
658 | |
659 | return mask; |
660 | } |
661 | #endif |
662 | |
663 | #if ENABLE_FEATURE_FIND_PERM \ |
664 | || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \ |
665 | || ENABLE_FEATURE_FIND_SIZE || ENABLE_FEATURE_FIND_LINKS |
666 | static const char* plus_minus_num(const char* str) |
667 | { |
668 | if (*str == '-' || *str == '+') |
669 | str++; |
670 | return str; |
671 | } |
672 | #endif |
673 | |
674 | static action*** parse_params(char **argv) |
675 | { |
676 | enum { |
677 | PARM_a , |
678 | PARM_o , |
679 | IF_FEATURE_FIND_NOT( PARM_char_not ,) |
680 | #if ENABLE_DESKTOP |
681 | PARM_and , |
682 | PARM_or , |
683 | IF_FEATURE_FIND_NOT( PARM_not ,) |
684 | #endif |
685 | PARM_print , |
686 | IF_FEATURE_FIND_PRINT0( PARM_print0 ,) |
687 | IF_FEATURE_FIND_DEPTH( PARM_depth ,) |
688 | IF_FEATURE_FIND_PRUNE( PARM_prune ,) |
689 | IF_FEATURE_FIND_DELETE( PARM_delete ,) |
690 | IF_FEATURE_FIND_EXEC( PARM_exec ,) |
691 | IF_FEATURE_FIND_PAREN( PARM_char_brace,) |
692 | /* All options starting from here require argument */ |
693 | PARM_name , |
694 | PARM_iname , |
695 | IF_FEATURE_FIND_PATH( PARM_path ,) |
696 | IF_FEATURE_FIND_REGEX( PARM_regex ,) |
697 | IF_FEATURE_FIND_TYPE( PARM_type ,) |
698 | IF_FEATURE_FIND_PERM( PARM_perm ,) |
699 | IF_FEATURE_FIND_MTIME( PARM_mtime ,) |
700 | IF_FEATURE_FIND_MMIN( PARM_mmin ,) |
701 | IF_FEATURE_FIND_NEWER( PARM_newer ,) |
702 | IF_FEATURE_FIND_INUM( PARM_inum ,) |
703 | IF_FEATURE_FIND_USER( PARM_user ,) |
704 | IF_FEATURE_FIND_GROUP( PARM_group ,) |
705 | IF_FEATURE_FIND_SIZE( PARM_size ,) |
706 | IF_FEATURE_FIND_CONTEXT(PARM_context ,) |
707 | IF_FEATURE_FIND_LINKS( PARM_links ,) |
708 | }; |
709 | |
710 | static const char params[] ALIGN1 = |
711 | "-a\0" |
712 | "-o\0" |
713 | IF_FEATURE_FIND_NOT( "!\0" ) |
714 | #if ENABLE_DESKTOP |
715 | "-and\0" |
716 | "-or\0" |
717 | IF_FEATURE_FIND_NOT( "-not\0" ) |
718 | #endif |
719 | "-print\0" |
720 | IF_FEATURE_FIND_PRINT0( "-print0\0" ) |
721 | IF_FEATURE_FIND_DEPTH( "-depth\0" ) |
722 | IF_FEATURE_FIND_PRUNE( "-prune\0" ) |
723 | IF_FEATURE_FIND_DELETE( "-delete\0" ) |
724 | IF_FEATURE_FIND_EXEC( "-exec\0" ) |
725 | IF_FEATURE_FIND_PAREN( "(\0" ) |
726 | /* All options starting from here require argument */ |
727 | "-name\0" |
728 | "-iname\0" |
729 | IF_FEATURE_FIND_PATH( "-path\0" ) |
730 | IF_FEATURE_FIND_REGEX( "-regex\0" ) |
731 | IF_FEATURE_FIND_TYPE( "-type\0" ) |
732 | IF_FEATURE_FIND_PERM( "-perm\0" ) |
733 | IF_FEATURE_FIND_MTIME( "-mtime\0" ) |
734 | IF_FEATURE_FIND_MMIN( "-mmin\0" ) |
735 | IF_FEATURE_FIND_NEWER( "-newer\0" ) |
736 | IF_FEATURE_FIND_INUM( "-inum\0" ) |
737 | IF_FEATURE_FIND_USER( "-user\0" ) |
738 | IF_FEATURE_FIND_GROUP( "-group\0" ) |
739 | IF_FEATURE_FIND_SIZE( "-size\0" ) |
740 | IF_FEATURE_FIND_CONTEXT("-context\0") |
741 | IF_FEATURE_FIND_LINKS( "-links\0" ) |
742 | ; |
743 | |
744 | action*** appp; |
745 | unsigned cur_group = 0; |
746 | unsigned cur_action = 0; |
747 | IF_FEATURE_FIND_NOT( bool invert_flag = 0; ) |
748 | |
749 | /* This is the only place in busybox where we use nested function. |
750 | * So far more standard alternatives were bigger. */ |
751 | /* Suppress a warning "func without a prototype" */ |
752 | auto action* alloc_action(int sizeof_struct, action_fp f); |
753 | action* alloc_action(int sizeof_struct, action_fp f) |
754 | { |
755 | action *ap; |
756 | appp[cur_group] = xrealloc(appp[cur_group], (cur_action+2) * sizeof(*appp)); |
757 | appp[cur_group][cur_action++] = ap = xmalloc(sizeof_struct); |
758 | appp[cur_group][cur_action] = NULL; |
759 | ap->f = f; |
760 | IF_FEATURE_FIND_NOT( ap->invert = invert_flag; ) |
761 | IF_FEATURE_FIND_NOT( invert_flag = 0; ) |
762 | return ap; |
763 | } |
764 | |
765 | #define ALLOC_ACTION(name) (action_##name*)alloc_action(sizeof(action_##name), (action_fp) func_##name) |
766 | |
767 | appp = xzalloc(2 * sizeof(appp[0])); /* appp[0],[1] == NULL */ |
768 | |
769 | /* Actions have side effects and return a true or false value |
770 | * We implement: -print, -print0, -exec |
771 | * |
772 | * The rest are tests. |
773 | * |
774 | * Tests and actions are grouped by operators |
775 | * ( expr ) Force precedence |
776 | * ! expr True if expr is false |
777 | * -not expr Same as ! expr |
778 | * expr1 [-a[nd]] expr2 And; expr2 is not evaluated if expr1 is false |
779 | * expr1 -o[r] expr2 Or; expr2 is not evaluated if expr1 is true |
780 | * expr1 , expr2 List; both expr1 and expr2 are always evaluated |
781 | * We implement: (), -a, -o |
782 | */ |
783 | while (*argv) { |
784 | const char *arg = argv[0]; |
785 | int parm = index_in_strings(params, arg); |
786 | const char *arg1 = argv[1]; |
787 | |
788 | if (parm >= PARM_name) { |
789 | /* All options starting from -name require argument */ |
790 | if (!arg1) |
791 | bb_error_msg_and_die(bb_msg_requires_arg, arg); |
792 | argv++; |
793 | } |
794 | |
795 | /* We can use big switch() here, but on i386 |
796 | * it doesn't give smaller code. Other arches? */ |
797 | |
798 | /* --- Operators --- */ |
799 | if (parm == PARM_a IF_DESKTOP(|| parm == PARM_and)) { |
800 | /* no further special handling required */ |
801 | } |
802 | else if (parm == PARM_o IF_DESKTOP(|| parm == PARM_or)) { |
803 | /* start new OR group */ |
804 | cur_group++; |
805 | appp = xrealloc(appp, (cur_group+2) * sizeof(*appp)); |
806 | /*appp[cur_group] = NULL; - already NULL */ |
807 | appp[cur_group+1] = NULL; |
808 | cur_action = 0; |
809 | } |
810 | #if ENABLE_FEATURE_FIND_NOT |
811 | else if (parm == PARM_char_not IF_DESKTOP(|| parm == PARM_not)) { |
812 | /* also handles "find ! ! -name 'foo*'" */ |
813 | invert_flag ^= 1; |
814 | } |
815 | #endif |
816 | |
817 | /* --- Tests and actions --- */ |
818 | else if (parm == PARM_print) { |
819 | G.need_print = 0; |
820 | /* GNU find ignores '!' here: "find ! -print" */ |
821 | IF_FEATURE_FIND_NOT( invert_flag = 0; ) |
822 | (void) ALLOC_ACTION(print); |
823 | } |
824 | #if ENABLE_FEATURE_FIND_PRINT0 |
825 | else if (parm == PARM_print0) { |
826 | G.need_print = 0; |
827 | IF_FEATURE_FIND_NOT( invert_flag = 0; ) |
828 | (void) ALLOC_ACTION(print0); |
829 | } |
830 | #endif |
831 | #if ENABLE_FEATURE_FIND_DEPTH |
832 | else if (parm == PARM_depth) { |
833 | G.recurse_flags |= ACTION_DEPTHFIRST; |
834 | } |
835 | #endif |
836 | #if ENABLE_FEATURE_FIND_PRUNE |
837 | else if (parm == PARM_prune) { |
838 | IF_FEATURE_FIND_NOT( invert_flag = 0; ) |
839 | (void) ALLOC_ACTION(prune); |
840 | } |
841 | #endif |
842 | #if ENABLE_FEATURE_FIND_DELETE |
843 | else if (parm == PARM_delete) { |
844 | G.need_print = 0; |
845 | G.recurse_flags |= ACTION_DEPTHFIRST; |
846 | (void) ALLOC_ACTION(delete); |
847 | } |
848 | #endif |
849 | #if ENABLE_FEATURE_FIND_EXEC |
850 | else if (parm == PARM_exec) { |
851 | int i; |
852 | action_exec *ap; |
853 | G.need_print = 0; |
854 | IF_FEATURE_FIND_NOT( invert_flag = 0; ) |
855 | ap = ALLOC_ACTION(exec); |
856 | ap->exec_argv = ++argv; /* first arg after -exec */ |
857 | ap->exec_argc = 0; |
858 | while (1) { |
859 | if (!*argv) /* did not see ';' or '+' until end */ |
860 | bb_error_msg_and_die(bb_msg_requires_arg, "-exec"); |
861 | if (LONE_CHAR(argv[0], ';')) |
862 | break; |
863 | //TODO: implement {} + (like xargs) |
864 | // See: |
865 | // find findutils/ -exec echo ">"{}"<" \; |
866 | // find findutils/ -exec echo ">"{}"<" + |
867 | argv++; |
868 | ap->exec_argc++; |
869 | } |
870 | if (ap->exec_argc == 0) |
871 | bb_error_msg_and_die(bb_msg_requires_arg, arg); |
872 | ap->subst_count = xmalloc(ap->exec_argc * sizeof(int)); |
873 | i = ap->exec_argc; |
874 | while (i--) |
875 | ap->subst_count[i] = count_subst(ap->exec_argv[i]); |
876 | } |
877 | #endif |
878 | #if ENABLE_FEATURE_FIND_PAREN |
879 | else if (parm == PARM_char_brace) { |
880 | action_paren *ap; |
881 | char **endarg; |
882 | unsigned nested = 1; |
883 | |
884 | endarg = argv; |
885 | while (1) { |
886 | if (!*++endarg) |
887 | bb_error_msg_and_die("unpaired '('"); |
888 | if (LONE_CHAR(*endarg, '(')) |
889 | nested++; |
890 | else if (LONE_CHAR(*endarg, ')') && !--nested) { |
891 | *endarg = NULL; |
892 | break; |
893 | } |
894 | } |
895 | ap = ALLOC_ACTION(paren); |
896 | ap->subexpr = parse_params(argv + 1); |
897 | *endarg = (char*) ")"; /* restore NULLed parameter */ |
898 | argv = endarg; |
899 | } |
900 | #endif |
901 | else if (parm == PARM_name || parm == PARM_iname) { |
902 | action_name *ap; |
903 | ap = ALLOC_ACTION(name); |
904 | ap->pattern = arg1; |
905 | ap->iname = (parm == PARM_iname); |
906 | } |
907 | #if ENABLE_FEATURE_FIND_PATH |
908 | else if (parm == PARM_path) { |
909 | action_path *ap; |
910 | ap = ALLOC_ACTION(path); |
911 | ap->pattern = arg1; |
912 | } |
913 | #endif |
914 | #if ENABLE_FEATURE_FIND_REGEX |
915 | else if (parm == PARM_regex) { |
916 | action_regex *ap; |
917 | ap = ALLOC_ACTION(regex); |
918 | xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/); |
919 | } |
920 | #endif |
921 | #if ENABLE_FEATURE_FIND_TYPE |
922 | else if (parm == PARM_type) { |
923 | action_type *ap; |
924 | ap = ALLOC_ACTION(type); |
925 | ap->type_mask = find_type(arg1); |
926 | } |
927 | #endif |
928 | #if ENABLE_FEATURE_FIND_PERM |
929 | /* -perm mode File's permission bits are exactly mode (octal or symbolic). |
930 | * Symbolic modes use mode 0 as a point of departure. |
931 | * -perm -mode All of the permission bits mode are set for the file. |
932 | * -perm +mode Any of the permission bits mode are set for the file. |
933 | */ |
934 | else if (parm == PARM_perm) { |
935 | action_perm *ap; |
936 | ap = ALLOC_ACTION(perm); |
937 | ap->perm_char = arg1[0]; |
938 | arg1 = plus_minus_num(arg1); |
939 | ap->perm_mask = 0; |
940 | if (!bb_parse_mode(arg1, &ap->perm_mask)) |
941 | bb_error_msg_and_die("invalid mode '%s'", arg1); |
942 | } |
943 | #endif |
944 | #if ENABLE_FEATURE_FIND_MTIME |
945 | else if (parm == PARM_mtime) { |
946 | action_mtime *ap; |
947 | ap = ALLOC_ACTION(mtime); |
948 | ap->mtime_char = arg1[0]; |
949 | ap->mtime_days = xatoul(plus_minus_num(arg1)); |
950 | } |
951 | #endif |
952 | #if ENABLE_FEATURE_FIND_MMIN |
953 | else if (parm == PARM_mmin) { |
954 | action_mmin *ap; |
955 | ap = ALLOC_ACTION(mmin); |
956 | ap->mmin_char = arg1[0]; |
957 | ap->mmin_mins = xatoul(plus_minus_num(arg1)); |
958 | } |
959 | #endif |
960 | #if ENABLE_FEATURE_FIND_NEWER |
961 | else if (parm == PARM_newer) { |
962 | struct stat stat_newer; |
963 | action_newer *ap; |
964 | ap = ALLOC_ACTION(newer); |
965 | xstat(arg1, &stat_newer); |
966 | ap->newer_mtime = stat_newer.st_mtime; |
967 | } |
968 | #endif |
969 | #if ENABLE_FEATURE_FIND_INUM |
970 | else if (parm == PARM_inum) { |
971 | action_inum *ap; |
972 | ap = ALLOC_ACTION(inum); |
973 | ap->inode_num = xatoul(arg1); |
974 | } |
975 | #endif |
976 | #if ENABLE_FEATURE_FIND_USER |
977 | else if (parm == PARM_user) { |
978 | action_user *ap; |
979 | ap = ALLOC_ACTION(user); |
980 | ap->uid = bb_strtou(arg1, NULL, 10); |
981 | if (errno) |
982 | ap->uid = xuname2uid(arg1); |
983 | } |
984 | #endif |
985 | #if ENABLE_FEATURE_FIND_GROUP |
986 | else if (parm == PARM_group) { |
987 | action_group *ap; |
988 | ap = ALLOC_ACTION(group); |
989 | ap->gid = bb_strtou(arg1, NULL, 10); |
990 | if (errno) |
991 | ap->gid = xgroup2gid(arg1); |
992 | } |
993 | #endif |
994 | #if ENABLE_FEATURE_FIND_SIZE |
995 | else if (parm == PARM_size) { |
996 | /* -size n[bckw]: file uses n units of space |
997 | * b (default): units are 512-byte blocks |
998 | * c: 1 byte |
999 | * k: kilobytes |
1000 | * w: 2-byte words |
1001 | */ |
1002 | #if ENABLE_LFS |
1003 | #define XATOU_SFX xatoull_sfx |
1004 | #else |
1005 | #define XATOU_SFX xatoul_sfx |
1006 | #endif |
1007 | static const struct suffix_mult find_suffixes[] = { |
1008 | { "c", 1 }, |
1009 | { "w", 2 }, |
1010 | { "", 512 }, |
1011 | { "b", 512 }, |
1012 | { "k", 1024 }, |
1013 | { "", 0 } |
1014 | }; |
1015 | action_size *ap; |
1016 | ap = ALLOC_ACTION(size); |
1017 | ap->size_char = arg1[0]; |
1018 | ap->size = XATOU_SFX(plus_minus_num(arg1), find_suffixes); |
1019 | } |
1020 | #endif |
1021 | #if ENABLE_FEATURE_FIND_CONTEXT |
1022 | else if (parm == PARM_context) { |
1023 | action_context *ap; |
1024 | ap = ALLOC_ACTION(context); |
1025 | ap->context = NULL; |
1026 | /* SELinux headers erroneously declare non-const parameter */ |
1027 | if (selinux_raw_to_trans_context((char*)arg1, &ap->context)) |
1028 | bb_simple_perror_msg(arg1); |
1029 | } |
1030 | #endif |
1031 | #if ENABLE_FEATURE_FIND_LINKS |
1032 | else if (parm == PARM_links) { |
1033 | action_links *ap; |
1034 | ap = ALLOC_ACTION(links); |
1035 | ap->links_char = arg1[0]; |
1036 | ap->links_count = xatoul(plus_minus_num(arg1)); |
1037 | } |
1038 | #endif |
1039 | else { |
1040 | bb_error_msg("unrecognized: %s", arg); |
1041 | bb_show_usage(); |
1042 | } |
1043 | argv++; |
1044 | } |
1045 | return appp; |
1046 | #undef ALLOC_ACTION |
1047 | } |
1048 | |
1049 | //usage:#define find_trivial_usage |
1050 | //usage: "[PATH]... [EXPRESSION]" |
1051 | //usage:#define find_full_usage "\n\n" |
1052 | //usage: "Search for files. The default PATH is the current directory,\n" |
1053 | //usage: "default EXPRESSION is '-print'\n" |
1054 | //usage: "\nEXPRESSION may consist of:" |
1055 | //usage: "\n -follow Follow symlinks" |
1056 | //usage: IF_FEATURE_FIND_XDEV( |
1057 | //usage: "\n -xdev Don't descend directories on other filesystems" |
1058 | //usage: ) |
1059 | //usage: IF_FEATURE_FIND_MAXDEPTH( |
1060 | //usage: "\n -maxdepth N Descend at most N levels. -maxdepth 0 applies" |
1061 | //usage: "\n tests/actions to command line arguments only" |
1062 | //usage: ) |
1063 | //usage: "\n -mindepth N Don't act on first N levels" |
1064 | //usage: "\n -name PATTERN File name (w/o directory name) matches PATTERN" |
1065 | //usage: "\n -iname PATTERN Case insensitive -name" |
1066 | //usage: IF_FEATURE_FIND_PATH( |
1067 | //usage: "\n -path PATTERN Path matches PATTERN" |
1068 | //usage: ) |
1069 | //usage: IF_FEATURE_FIND_REGEX( |
1070 | //usage: "\n -regex PATTERN Path matches regex PATTERN" |
1071 | //usage: ) |
1072 | //usage: IF_FEATURE_FIND_TYPE( |
1073 | //usage: "\n -type X File type is X (X is one of: f,d,l,b,c,...)" |
1074 | //usage: ) |
1075 | //usage: IF_FEATURE_FIND_PERM( |
1076 | //usage: "\n -perm NNN Permissions match any of (+NNN), all of (-NNN)," |
1077 | //usage: "\n or exactly NNN" |
1078 | //usage: ) |
1079 | //usage: IF_FEATURE_FIND_MTIME( |
1080 | //usage: "\n -mtime DAYS Modified time is greater than (+N), less than (-N)," |
1081 | //usage: "\n or exactly N days" |
1082 | //usage: ) |
1083 | //usage: IF_FEATURE_FIND_MMIN( |
1084 | //usage: "\n -mmin MINS Modified time is greater than (+N), less than (-N)," |
1085 | //usage: "\n or exactly N minutes" |
1086 | //usage: ) |
1087 | //usage: IF_FEATURE_FIND_NEWER( |
1088 | //usage: "\n -newer FILE Modified time is more recent than FILE's" |
1089 | //usage: ) |
1090 | //usage: IF_FEATURE_FIND_INUM( |
1091 | //usage: "\n -inum N File has inode number N" |
1092 | //usage: ) |
1093 | //usage: IF_FEATURE_FIND_USER( |
1094 | //usage: "\n -user NAME File is owned by user NAME (numeric user ID allowed)" |
1095 | //usage: ) |
1096 | //usage: IF_FEATURE_FIND_GROUP( |
1097 | //usage: "\n -group NAME File belongs to group NAME (numeric group ID allowed)" |
1098 | //usage: ) |
1099 | //usage: IF_FEATURE_FIND_DEPTH( |
1100 | //usage: "\n -depth Process directory name after traversing it" |
1101 | //usage: ) |
1102 | //usage: IF_FEATURE_FIND_SIZE( |
1103 | //usage: "\n -size N[bck] File size is N (c:bytes,k:kbytes,b:512 bytes(def.))" |
1104 | //usage: "\n +/-N: file size is bigger/smaller than N" |
1105 | //usage: ) |
1106 | //usage: IF_FEATURE_FIND_LINKS( |
1107 | //usage: "\n -links N Number of links is greater than (+N), less than (-N)," |
1108 | //usage: "\n or exactly N" |
1109 | //usage: ) |
1110 | //usage: "\n -print Print (default and assumed)" |
1111 | //usage: IF_FEATURE_FIND_PRINT0( |
1112 | //usage: "\n -print0 Delimit output with null characters rather than" |
1113 | //usage: "\n newlines" |
1114 | //usage: ) |
1115 | //usage: IF_FEATURE_FIND_CONTEXT( |
1116 | //usage: "\n -context File has specified security context" |
1117 | //usage: ) |
1118 | //usage: IF_FEATURE_FIND_EXEC( |
1119 | //usage: "\n -exec CMD ARG ; Run CMD with all instances of {} replaced by the" |
1120 | //usage: "\n matching files" |
1121 | //usage: ) |
1122 | //usage: IF_FEATURE_FIND_PRUNE( |
1123 | //usage: "\n -prune Stop traversing current subtree" |
1124 | //usage: ) |
1125 | //usage: IF_FEATURE_FIND_DELETE( |
1126 | //usage: "\n -delete Delete files, turns on -depth option" |
1127 | //usage: ) |
1128 | //usage: IF_FEATURE_FIND_PAREN( |
1129 | //usage: "\n (EXPR) Group an expression" |
1130 | //usage: ) |
1131 | //usage: |
1132 | //usage:#define find_example_usage |
1133 | //usage: "$ find / -name passwd\n" |
1134 | //usage: "/etc/passwd\n" |
1135 | |
1136 | int find_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
1137 | int find_main(int argc UNUSED_PARAM, char **argv) |
1138 | { |
1139 | static const char options[] ALIGN1 = |
1140 | "-follow\0" |
1141 | IF_FEATURE_FIND_XDEV( "-xdev\0" ) |
1142 | IF_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0") |
1143 | ; |
1144 | enum { |
1145 | OPT_FOLLOW, |
1146 | IF_FEATURE_FIND_XDEV( OPT_XDEV ,) |
1147 | IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,) |
1148 | }; |
1149 | |
1150 | char *arg; |
1151 | char **argp; |
1152 | int i, firstopt, status = EXIT_SUCCESS; |
1153 | #if ENABLE_FEATURE_FIND_MAXDEPTH |
1154 | int minmaxdepth[2] = { 0, INT_MAX }; |
1155 | #else |
1156 | #define minmaxdepth NULL |
1157 | #endif |
1158 | |
1159 | INIT_G(); |
1160 | |
1161 | for (firstopt = 1; argv[firstopt]; firstopt++) { |
1162 | if (argv[firstopt][0] == '-') |
1163 | break; |
1164 | if (ENABLE_FEATURE_FIND_NOT && LONE_CHAR(argv[firstopt], '!')) |
1165 | break; |
1166 | #if ENABLE_FEATURE_FIND_PAREN |
1167 | if (LONE_CHAR(argv[firstopt], '(')) |
1168 | break; |
1169 | #endif |
1170 | } |
1171 | if (firstopt == 1) { |
1172 | argv[0] = (char*)"."; |
1173 | argv--; |
1174 | firstopt++; |
1175 | } |
1176 | |
1177 | /* All options always return true. They always take effect |
1178 | * rather than being processed only when their place in the |
1179 | * expression is reached. |
1180 | * We implement: -follow, -xdev, -maxdepth |
1181 | */ |
1182 | /* Process options, and replace then with -a */ |
1183 | /* (-a will be ignored by recursive parser later) */ |
1184 | argp = &argv[firstopt]; |
1185 | while ((arg = argp[0])) { |
1186 | int opt = index_in_strings(options, arg); |
1187 | if (opt == OPT_FOLLOW) { |
1188 | G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK; |
1189 | argp[0] = (char*)"-a"; |
1190 | } |
1191 | #if ENABLE_FEATURE_FIND_XDEV |
1192 | if (opt == OPT_XDEV) { |
1193 | struct stat stbuf; |
1194 | if (!G.xdev_count) { |
1195 | G.xdev_count = firstopt - 1; |
1196 | G.xdev_dev = xzalloc(G.xdev_count * sizeof(G.xdev_dev[0])); |
1197 | for (i = 1; i < firstopt; i++) { |
1198 | /* not xstat(): shouldn't bomb out on |
1199 | * "find not_exist exist -xdev" */ |
1200 | if (stat(argv[i], &stbuf) == 0) |
1201 | G.xdev_dev[i-1] = stbuf.st_dev; |
1202 | /* else G.xdev_dev[i-1] stays 0 and |
1203 | * won't match any real device dev_t */ |
1204 | } |
1205 | } |
1206 | argp[0] = (char*)"-a"; |
1207 | } |
1208 | #endif |
1209 | #if ENABLE_FEATURE_FIND_MAXDEPTH |
1210 | if (opt == OPT_MINDEPTH || opt == OPT_MINDEPTH + 1) { |
1211 | if (!argp[1]) |
1212 | bb_show_usage(); |
1213 | minmaxdepth[opt - OPT_MINDEPTH] = xatoi_u(argp[1]); |
1214 | argp[0] = (char*)"-a"; |
1215 | argp[1] = (char*)"-a"; |
1216 | argp++; |
1217 | } |
1218 | #endif |
1219 | argp++; |
1220 | } |
1221 | |
1222 | G.actions = parse_params(&argv[firstopt]); |
1223 | |
1224 | for (i = 1; i < firstopt; i++) { |
1225 | if (!recursive_action(argv[i], |
1226 | G.recurse_flags,/* flags */ |
1227 | fileAction, /* file action */ |
1228 | fileAction, /* dir action */ |
1229 | #if ENABLE_FEATURE_FIND_MAXDEPTH |
1230 | minmaxdepth, /* user data */ |
1231 | #else |
1232 | NULL, /* user data */ |
1233 | #endif |
1234 | 0)) /* depth */ |
1235 | status = EXIT_FAILURE; |
1236 | } |
1237 | return status; |
1238 | } |