source: MondoRescue/branches/3.2/mindi-busybox/findutils/find.c@ 3186

Last change on this file since 3186 was 2725, checked in by Bruno Cornec, 13 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
File size: 35.1 KB
Line 
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 GPLv2, see file LICENSE in this source tree.
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
242typedef int (*action_fp)(const char *fileName, const struct stat *statbuf, void *) FAST_FUNC;
243
244typedef 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;)
259IF_FEATURE_FIND_PATH( ACTS(path, const char *pattern;))
260IF_FEATURE_FIND_REGEX( ACTS(regex, regex_t compiled_pattern;))
261IF_FEATURE_FIND_PRINT0( ACTS(print0))
262IF_FEATURE_FIND_TYPE( ACTS(type, int type_mask;))
263IF_FEATURE_FIND_PERM( ACTS(perm, char perm_char; mode_t perm_mask;))
264IF_FEATURE_FIND_MTIME( ACTS(mtime, char mtime_char; unsigned mtime_days;))
265IF_FEATURE_FIND_MMIN( ACTS(mmin, char mmin_char; unsigned mmin_mins;))
266IF_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;))
267IF_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;))
268IF_FEATURE_FIND_USER( ACTS(user, uid_t uid;))
269IF_FEATURE_FIND_SIZE( ACTS(size, char size_char; off_t size;))
270IF_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;))
271IF_FEATURE_FIND_PAREN( ACTS(paren, action ***subexpr;))
272IF_FEATURE_FIND_PRUNE( ACTS(prune))
273IF_FEATURE_FIND_DELETE( ACTS(delete))
274IF_FEATURE_FIND_EXEC( ACTS(exec, char **exec_argv; unsigned *subst_count; int exec_argc;))
275IF_FEATURE_FIND_GROUP( ACTS(group, gid_t gid;))
276IF_FEATURE_FIND_LINKS( ACTS(links, char links_char; int links_count;))
277
278struct 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
297static 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
308static 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
331static 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
375ACTF(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
394ACTF(path)
395{
396 return fnmatch(ap->pattern, fileName, 0) == 0;
397}
398#endif
399#if ENABLE_FEATURE_FIND_REGEX
400ACTF(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
413ACTF(type)
414{
415 return ((statbuf->st_mode & S_IFMT) == ap->type_mask);
416}
417#endif
418#if ENABLE_FEATURE_FIND_PERM
419ACTF(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
432ACTF(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
445ACTF(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
458ACTF(newer)
459{
460 return (ap->newer_mtime < statbuf->st_mtime);
461}
462#endif
463#if ENABLE_FEATURE_FIND_INUM
464ACTF(inum)
465{
466 return (statbuf->st_ino == ap->inode_num);
467}
468#endif
469#if ENABLE_FEATURE_FIND_EXEC
470ACTF(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
493ACTF(user)
494{
495 return (statbuf->st_uid == ap->uid);
496}
497#endif
498#if ENABLE_FEATURE_FIND_GROUP
499ACTF(group)
500{
501 return (statbuf->st_gid == ap->gid);
502}
503#endif
504#if ENABLE_FEATURE_FIND_PRINT0
505ACTF(print0)
506{
507 printf("%s%c", fileName, '\0');
508 return TRUE;
509}
510#endif
511ACTF(print)
512{
513 puts(fileName);
514 return TRUE;
515}
516#if ENABLE_FEATURE_FIND_PAREN
517ACTF(paren)
518{
519 return exec_actions(ap->subexpr, fileName, statbuf);
520}
521#endif
522#if ENABLE_FEATURE_FIND_SIZE
523ACTF(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 */
539ACTF(prune)
540{
541 return SKIP + TRUE;
542}
543#endif
544#if ENABLE_FEATURE_FIND_DELETE
545ACTF(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
559ACTF(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
577ACTF(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
587static 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
637static 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
666static const char* plus_minus_num(const char* str)
667{
668 if (*str == '-' || *str == '+')
669 str++;
670 return str;
671}
672#endif
673
674static 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 /* Auto decl suppresses "func without a prototype" warning: */
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 = xzalloc(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; - ALLOC_ACTION did it */
858 while (1) {
859 if (!*argv) /* did not see ';' or '+' until end */
860 bb_error_msg_and_die(bb_msg_requires_arg, "-exec");
861 // find -exec echo Foo ">{}<" ";"
862 // executes "echo Foo <filename>",
863 // find -exec echo Foo ">{}<" "+"
864 // executes "echo Foo <filename1> <filename2> <filename3>...".
865 // TODO (so far we treat "+" just like ";")
866 if ((argv[0][0] == ';' || argv[0][0] == '+')
867 && argv[0][1] == '\0'
868 ) {
869 break;
870 }
871 argv++;
872 ap->exec_argc++;
873 }
874 if (ap->exec_argc == 0)
875 bb_error_msg_and_die(bb_msg_requires_arg, arg);
876 ap->subst_count = xmalloc(ap->exec_argc * sizeof(int));
877 i = ap->exec_argc;
878 while (i--)
879 ap->subst_count[i] = count_subst(ap->exec_argv[i]);
880 }
881#endif
882#if ENABLE_FEATURE_FIND_PAREN
883 else if (parm == PARM_char_brace) {
884 action_paren *ap;
885 char **endarg;
886 unsigned nested = 1;
887
888 endarg = argv;
889 while (1) {
890 if (!*++endarg)
891 bb_error_msg_and_die("unpaired '('");
892 if (LONE_CHAR(*endarg, '('))
893 nested++;
894 else if (LONE_CHAR(*endarg, ')') && !--nested) {
895 *endarg = NULL;
896 break;
897 }
898 }
899 ap = ALLOC_ACTION(paren);
900 ap->subexpr = parse_params(argv + 1);
901 *endarg = (char*) ")"; /* restore NULLed parameter */
902 argv = endarg;
903 }
904#endif
905 else if (parm == PARM_name || parm == PARM_iname) {
906 action_name *ap;
907 ap = ALLOC_ACTION(name);
908 ap->pattern = arg1;
909 ap->iname = (parm == PARM_iname);
910 }
911#if ENABLE_FEATURE_FIND_PATH
912 else if (parm == PARM_path) {
913 action_path *ap;
914 ap = ALLOC_ACTION(path);
915 ap->pattern = arg1;
916 }
917#endif
918#if ENABLE_FEATURE_FIND_REGEX
919 else if (parm == PARM_regex) {
920 action_regex *ap;
921 ap = ALLOC_ACTION(regex);
922 xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/);
923 }
924#endif
925#if ENABLE_FEATURE_FIND_TYPE
926 else if (parm == PARM_type) {
927 action_type *ap;
928 ap = ALLOC_ACTION(type);
929 ap->type_mask = find_type(arg1);
930 }
931#endif
932#if ENABLE_FEATURE_FIND_PERM
933/* -perm mode File's permission bits are exactly mode (octal or symbolic).
934 * Symbolic modes use mode 0 as a point of departure.
935 * -perm -mode All of the permission bits mode are set for the file.
936 * -perm +mode Any of the permission bits mode are set for the file.
937 */
938 else if (parm == PARM_perm) {
939 action_perm *ap;
940 ap = ALLOC_ACTION(perm);
941 ap->perm_char = arg1[0];
942 arg1 = plus_minus_num(arg1);
943 /*ap->perm_mask = 0; - ALLOC_ACTION did it */
944 if (!bb_parse_mode(arg1, &ap->perm_mask))
945 bb_error_msg_and_die("invalid mode '%s'", arg1);
946 }
947#endif
948#if ENABLE_FEATURE_FIND_MTIME
949 else if (parm == PARM_mtime) {
950 action_mtime *ap;
951 ap = ALLOC_ACTION(mtime);
952 ap->mtime_char = arg1[0];
953 ap->mtime_days = xatoul(plus_minus_num(arg1));
954 }
955#endif
956#if ENABLE_FEATURE_FIND_MMIN
957 else if (parm == PARM_mmin) {
958 action_mmin *ap;
959 ap = ALLOC_ACTION(mmin);
960 ap->mmin_char = arg1[0];
961 ap->mmin_mins = xatoul(plus_minus_num(arg1));
962 }
963#endif
964#if ENABLE_FEATURE_FIND_NEWER
965 else if (parm == PARM_newer) {
966 struct stat stat_newer;
967 action_newer *ap;
968 ap = ALLOC_ACTION(newer);
969 xstat(arg1, &stat_newer);
970 ap->newer_mtime = stat_newer.st_mtime;
971 }
972#endif
973#if ENABLE_FEATURE_FIND_INUM
974 else if (parm == PARM_inum) {
975 action_inum *ap;
976 ap = ALLOC_ACTION(inum);
977 ap->inode_num = xatoul(arg1);
978 }
979#endif
980#if ENABLE_FEATURE_FIND_USER
981 else if (parm == PARM_user) {
982 action_user *ap;
983 ap = ALLOC_ACTION(user);
984 ap->uid = bb_strtou(arg1, NULL, 10);
985 if (errno)
986 ap->uid = xuname2uid(arg1);
987 }
988#endif
989#if ENABLE_FEATURE_FIND_GROUP
990 else if (parm == PARM_group) {
991 action_group *ap;
992 ap = ALLOC_ACTION(group);
993 ap->gid = bb_strtou(arg1, NULL, 10);
994 if (errno)
995 ap->gid = xgroup2gid(arg1);
996 }
997#endif
998#if ENABLE_FEATURE_FIND_SIZE
999 else if (parm == PARM_size) {
1000/* -size n[bckw]: file uses n units of space
1001 * b (default): units are 512-byte blocks
1002 * c: 1 byte
1003 * k: kilobytes
1004 * w: 2-byte words
1005 */
1006#if ENABLE_LFS
1007#define XATOU_SFX xatoull_sfx
1008#else
1009#define XATOU_SFX xatoul_sfx
1010#endif
1011 static const struct suffix_mult find_suffixes[] = {
1012 { "c", 1 },
1013 { "w", 2 },
1014 { "", 512 },
1015 { "b", 512 },
1016 { "k", 1024 },
1017 { "", 0 }
1018 };
1019 action_size *ap;
1020 ap = ALLOC_ACTION(size);
1021 ap->size_char = arg1[0];
1022 ap->size = XATOU_SFX(plus_minus_num(arg1), find_suffixes);
1023 }
1024#endif
1025#if ENABLE_FEATURE_FIND_CONTEXT
1026 else if (parm == PARM_context) {
1027 action_context *ap;
1028 ap = ALLOC_ACTION(context);
1029 /*ap->context = NULL; - ALLOC_ACTION did it */
1030 /* SELinux headers erroneously declare non-const parameter */
1031 if (selinux_raw_to_trans_context((char*)arg1, &ap->context))
1032 bb_simple_perror_msg(arg1);
1033 }
1034#endif
1035#if ENABLE_FEATURE_FIND_LINKS
1036 else if (parm == PARM_links) {
1037 action_links *ap;
1038 ap = ALLOC_ACTION(links);
1039 ap->links_char = arg1[0];
1040 ap->links_count = xatoul(plus_minus_num(arg1));
1041 }
1042#endif
1043 else {
1044 bb_error_msg("unrecognized: %s", arg);
1045 bb_show_usage();
1046 }
1047 argv++;
1048 }
1049 return appp;
1050#undef ALLOC_ACTION
1051}
1052
1053//usage:#define find_trivial_usage
1054//usage: "[PATH]... [EXPRESSION]"
1055//usage:#define find_full_usage "\n\n"
1056//usage: "Search for files. The default PATH is the current directory,\n"
1057//usage: "default EXPRESSION is '-print'\n"
1058//usage: "\nEXPRESSION may consist of:"
1059//usage: "\n -follow Follow symlinks"
1060//usage: IF_FEATURE_FIND_XDEV(
1061//usage: "\n -xdev Don't descend directories on other filesystems"
1062//usage: )
1063//usage: IF_FEATURE_FIND_MAXDEPTH(
1064//usage: "\n -maxdepth N Descend at most N levels. -maxdepth 0 applies"
1065//usage: "\n tests/actions to command line arguments only"
1066//usage: )
1067//usage: "\n -mindepth N Don't act on first N levels"
1068//usage: "\n -name PATTERN File name (w/o directory name) matches PATTERN"
1069//usage: "\n -iname PATTERN Case insensitive -name"
1070//usage: IF_FEATURE_FIND_PATH(
1071//usage: "\n -path PATTERN Path matches PATTERN"
1072//usage: )
1073//usage: IF_FEATURE_FIND_REGEX(
1074//usage: "\n -regex PATTERN Path matches regex PATTERN"
1075//usage: )
1076//usage: IF_FEATURE_FIND_TYPE(
1077//usage: "\n -type X File type is X (X is one of: f,d,l,b,c,...)"
1078//usage: )
1079//usage: IF_FEATURE_FIND_PERM(
1080//usage: "\n -perm NNN Permissions match any of (+NNN), all of (-NNN),"
1081//usage: "\n or exactly NNN"
1082//usage: )
1083//usage: IF_FEATURE_FIND_MTIME(
1084//usage: "\n -mtime DAYS Modified time is greater than (+N), less than (-N),"
1085//usage: "\n or exactly N days"
1086//usage: )
1087//usage: IF_FEATURE_FIND_MMIN(
1088//usage: "\n -mmin MINS Modified time is greater than (+N), less than (-N),"
1089//usage: "\n or exactly N minutes"
1090//usage: )
1091//usage: IF_FEATURE_FIND_NEWER(
1092//usage: "\n -newer FILE Modified time is more recent than FILE's"
1093//usage: )
1094//usage: IF_FEATURE_FIND_INUM(
1095//usage: "\n -inum N File has inode number N"
1096//usage: )
1097//usage: IF_FEATURE_FIND_USER(
1098//usage: "\n -user NAME File is owned by user NAME (numeric user ID allowed)"
1099//usage: )
1100//usage: IF_FEATURE_FIND_GROUP(
1101//usage: "\n -group NAME File belongs to group NAME (numeric group ID allowed)"
1102//usage: )
1103//usage: IF_FEATURE_FIND_DEPTH(
1104//usage: "\n -depth Process directory name after traversing it"
1105//usage: )
1106//usage: IF_FEATURE_FIND_SIZE(
1107//usage: "\n -size N[bck] File size is N (c:bytes,k:kbytes,b:512 bytes(def.))"
1108//usage: "\n +/-N: file size is bigger/smaller than N"
1109//usage: )
1110//usage: IF_FEATURE_FIND_LINKS(
1111//usage: "\n -links N Number of links is greater than (+N), less than (-N),"
1112//usage: "\n or exactly N"
1113//usage: )
1114//usage: "\n -print Print (default and assumed)"
1115//usage: IF_FEATURE_FIND_PRINT0(
1116//usage: "\n -print0 Delimit output with null characters rather than"
1117//usage: "\n newlines"
1118//usage: )
1119//usage: IF_FEATURE_FIND_CONTEXT(
1120//usage: "\n -context File has specified security context"
1121//usage: )
1122//usage: IF_FEATURE_FIND_EXEC(
1123//usage: "\n -exec CMD ARG ; Run CMD with all instances of {} replaced by the"
1124//usage: "\n matching files"
1125//usage: )
1126//usage: IF_FEATURE_FIND_PRUNE(
1127//usage: "\n -prune Stop traversing current subtree"
1128//usage: )
1129//usage: IF_FEATURE_FIND_DELETE(
1130//usage: "\n -delete Delete files, turns on -depth option"
1131//usage: )
1132//usage: IF_FEATURE_FIND_PAREN(
1133//usage: "\n (EXPR) Group an expression"
1134//usage: )
1135//usage:
1136//usage:#define find_example_usage
1137//usage: "$ find / -name passwd\n"
1138//usage: "/etc/passwd\n"
1139
1140int find_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1141int find_main(int argc UNUSED_PARAM, char **argv)
1142{
1143 static const char options[] ALIGN1 =
1144 "-follow\0"
1145IF_FEATURE_FIND_XDEV( "-xdev\0" )
1146IF_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0")
1147 ;
1148 enum {
1149 OPT_FOLLOW,
1150IF_FEATURE_FIND_XDEV( OPT_XDEV ,)
1151IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,)
1152 };
1153
1154 char *arg;
1155 char **argp;
1156 int i, firstopt, status = EXIT_SUCCESS;
1157#if ENABLE_FEATURE_FIND_MAXDEPTH
1158 int minmaxdepth[2] = { 0, INT_MAX };
1159#else
1160#define minmaxdepth NULL
1161#endif
1162
1163 INIT_G();
1164
1165 for (firstopt = 1; argv[firstopt]; firstopt++) {
1166 if (argv[firstopt][0] == '-')
1167 break;
1168 if (ENABLE_FEATURE_FIND_NOT && LONE_CHAR(argv[firstopt], '!'))
1169 break;
1170#if ENABLE_FEATURE_FIND_PAREN
1171 if (LONE_CHAR(argv[firstopt], '('))
1172 break;
1173#endif
1174 }
1175 if (firstopt == 1) {
1176 argv[0] = (char*)".";
1177 argv--;
1178 firstopt++;
1179 }
1180
1181/* All options always return true. They always take effect
1182 * rather than being processed only when their place in the
1183 * expression is reached.
1184 * We implement: -follow, -xdev, -maxdepth
1185 */
1186 /* Process options, and replace then with -a */
1187 /* (-a will be ignored by recursive parser later) */
1188 argp = &argv[firstopt];
1189 while ((arg = argp[0])) {
1190 int opt = index_in_strings(options, arg);
1191 if (opt == OPT_FOLLOW) {
1192 G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK;
1193 argp[0] = (char*)"-a";
1194 }
1195#if ENABLE_FEATURE_FIND_XDEV
1196 if (opt == OPT_XDEV) {
1197 struct stat stbuf;
1198 if (!G.xdev_count) {
1199 G.xdev_count = firstopt - 1;
1200 G.xdev_dev = xzalloc(G.xdev_count * sizeof(G.xdev_dev[0]));
1201 for (i = 1; i < firstopt; i++) {
1202 /* not xstat(): shouldn't bomb out on
1203 * "find not_exist exist -xdev" */
1204 if (stat(argv[i], &stbuf) == 0)
1205 G.xdev_dev[i-1] = stbuf.st_dev;
1206 /* else G.xdev_dev[i-1] stays 0 and
1207 * won't match any real device dev_t */
1208 }
1209 }
1210 argp[0] = (char*)"-a";
1211 }
1212#endif
1213#if ENABLE_FEATURE_FIND_MAXDEPTH
1214 if (opt == OPT_MINDEPTH || opt == OPT_MINDEPTH + 1) {
1215 if (!argp[1])
1216 bb_show_usage();
1217 minmaxdepth[opt - OPT_MINDEPTH] = xatoi_positive(argp[1]);
1218 argp[0] = (char*)"-a";
1219 argp[1] = (char*)"-a";
1220 argp++;
1221 }
1222#endif
1223 argp++;
1224 }
1225
1226 G.actions = parse_params(&argv[firstopt]);
1227
1228 for (i = 1; i < firstopt; i++) {
1229 if (!recursive_action(argv[i],
1230 G.recurse_flags,/* flags */
1231 fileAction, /* file action */
1232 fileAction, /* dir action */
1233#if ENABLE_FEATURE_FIND_MAXDEPTH
1234 minmaxdepth, /* user data */
1235#else
1236 NULL, /* user data */
1237#endif
1238 0)) /* depth */
1239 status = EXIT_FAILURE;
1240 }
1241 return status;
1242}
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