1 /* vi: set sw=4 ts=4: */
3 * Mini find implementation for busybox
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Reworked by David Douthitt <n9ubh@callsign.net> and
8 * Matt Kraai <kraai@alumni.carnegiemellon.edu>.
10 * Licensed under the GPL version 2, see the file LICENSE in this tarball.
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' '{} {}' ';'
25 * (strace: execve("/bin/echo", ["echo", "file.txt file.txt"], [ 30 vars ]))
26 * # find file.txt -exec 'echo' '{} {}' ';' -print -exec pwd ';'
30 * # find -name '*.c' -o -name '*.h'
31 * [shows files, *.c and *.h intermixed]
32 * # find file.txt -name '*f*' -o -name '*t*'
34 * # find file.txt -name '*z*' -o -name '*t*'
36 * # find file.txt -name '*f*' -o -name '*z*'
39 * # find t z -name '*t*' -print -o -name '*z*'
41 * # find t z t z -name '*t*' -o -name '*z*' -print
44 * # find t z t z '(' -name '*t*' -o -name '*z*' ')' -o -print
51 USE_FEATURE_FIND_XDEV(static dev_t *xdev_dev;)
52 USE_FEATURE_FIND_XDEV(static int xdev_count;)
54 typedef int (*action_fp)(const char *fileName, struct stat *statbuf, void *);
59 #define ACTS(name, arg...) typedef struct { action a; arg; } action_##name;
60 #define ACTF(name) static int func_##name(const char *fileName, struct stat *statbuf, action_##name* ap)
62 ACTS(name, const char *pattern;)
63 USE_FEATURE_FIND_PRINT0(ACTS(print0))
64 USE_FEATURE_FIND_TYPE( ACTS(type, int type_mask;))
65 USE_FEATURE_FIND_PERM( ACTS(perm, char perm_char; mode_t perm_mask;))
66 USE_FEATURE_FIND_MTIME( ACTS(mtime, char mtime_char; unsigned mtime_days;))
67 USE_FEATURE_FIND_MMIN( ACTS(mmin, char mmin_char; unsigned mmin_mins;))
68 USE_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;))
69 USE_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;))
70 USE_FEATURE_FIND_EXEC( ACTS(exec, char **exec_argv; unsigned int *subst_count; int exec_argc;))
71 USE_FEATURE_FIND_USER( ACTS(user, int uid;))
72 USE_DESKTOP( ACTS(paren, action ***subexpr;))
73 USE_DESKTOP( ACTS(size, off_t size;))
74 USE_DESKTOP( ACTS(prune))
76 static action ***actions;
77 static smalluint need_print = 1;
80 #if ENABLE_FEATURE_FIND_EXEC
81 static unsigned int count_subst(const char *str)
83 unsigned int count = 0;
84 while ((str = strstr(str, "{}"))) {
92 static char* subst(const char *src, unsigned int count, const char* filename)
94 char *buf, *dst, *end;
95 int flen = strlen(filename);
96 /* we replace each '{}' with filename: growth by strlen-2 */
97 buf = dst = xmalloc(strlen(src) + count*(flen-2) + 1);
98 while ((end = strstr(src, "{}"))) {
99 memcpy(dst, src, end - src);
102 memcpy(dst, filename, flen);
111 static int exec_actions(action ***appp, const char *fileName, struct stat *statbuf)
119 while ((app = appp[++cur_group])) {
122 ap = app[++cur_action];
123 } while (ap && (rc = ap->f(fileName, statbuf, ap)));
125 /* all actions in group were successful */
135 const char *tmp = strrchr(fileName, '/');
140 return fnmatch(ap->pattern, tmp, FNM_PERIOD) == 0;
142 #if ENABLE_FEATURE_FIND_TYPE
145 return ((statbuf->st_mode & S_IFMT) == ap->type_mask);
148 #if ENABLE_FEATURE_FIND_PERM
151 /* -perm +mode: at least one of perm_mask bits are set */
152 if (ap->perm_char == '+')
153 return (statbuf->st_mode & ap->perm_mask) != 0;
154 /* -perm -mode: all of perm_mask are set */
155 if (ap->perm_char == '-')
156 return (statbuf->st_mode & ap->perm_mask) == ap->perm_mask;
157 /* -perm mode: file mode must match perm_mask */
158 return (statbuf->st_mode & 07777) == ap->perm_mask;
161 #if ENABLE_FEATURE_FIND_MTIME
164 time_t file_age = time(NULL) - statbuf->st_mtime;
165 time_t mtime_secs = ap->mtime_days * 24*60*60;
166 if (ap->mtime_char == '+')
167 return file_age >= mtime_secs + 24*60*60;
168 if (ap->mtime_char == '-')
169 return file_age < mtime_secs;
170 /* just numeric mtime */
171 return file_age >= mtime_secs && file_age < (mtime_secs + 24*60*60);
174 #if ENABLE_FEATURE_FIND_MMIN
177 time_t file_age = time(NULL) - statbuf->st_mtime;
178 time_t mmin_secs = ap->mmin_mins * 60;
179 if (ap->mmin_char == '+')
180 return file_age >= mmin_secs + 60;
181 if (ap->mmin_char == '-')
182 return file_age < mmin_secs;
183 /* just numeric mmin */
184 return file_age >= mmin_secs && file_age < (mmin_secs + 60);
187 #if ENABLE_FEATURE_FIND_NEWER
190 return (ap->newer_mtime < statbuf->st_mtime);
193 #if ENABLE_FEATURE_FIND_INUM
196 return (statbuf->st_ino == ap->inode_num);
199 #if ENABLE_FEATURE_FIND_EXEC
203 char *argv[ap->exec_argc+1];
204 for (i = 0; i < ap->exec_argc; i++)
205 argv[i] = subst(ap->exec_argv[i], ap->subst_count[i], fileName);
206 argv[i] = NULL; /* terminate the list */
207 rc = wait4pid(spawn(argv));
209 bb_perror_msg("%s", argv[0]);
210 for (i = 0; i < ap->exec_argc; i++)
212 return rc == 0; /* return 1 if success */
216 #if ENABLE_FEATURE_FIND_USER
219 return (statbuf->st_uid == ap->uid);
223 #if ENABLE_FEATURE_FIND_PRINT0
226 printf("%s%c", fileName, '\0');
240 return exec_actions(ap->subexpr, fileName, statbuf);
244 * -prune: if -depth is not given, return true and do not descend
245 * current dir; if -depth is given, return false with no effect.
247 * find dir -name 'asm-*' -prune -o -name '*.[chS]' -print
256 return statbuf->st_size == ap->size;
261 static int fileAction(const char *fileName, struct stat *statbuf, void* junk, int depth)
264 #ifdef CONFIG_FEATURE_FIND_XDEV
265 if (S_ISDIR(statbuf->st_mode) && xdev_count) {
267 for (i = 0; i < xdev_count; i++) {
268 if (xdev_dev[i] != statbuf->st_dev)
273 rc = exec_actions(actions, fileName, statbuf);
274 /* Had no explicit -print[0] or -exec? then print */
275 if (rc && need_print)
277 /* Cannot return 0: our caller, recursive_action(),
278 * will perror() and skip dirs (if called on dir) */
279 return rc == 0 ? TRUE : rc;
283 #if ENABLE_FEATURE_FIND_TYPE
284 static int find_type(const char *type)
312 if (mask == 0 || type[1] != '\0')
313 bb_error_msg_and_die(bb_msg_invalid_arg, type, "-type");
319 #if ENABLE_FEATURE_FIND_PERM || ENABLE_FEATURE_FIND_MTIME \
320 || ENABLE_FEATURE_FIND_MMIN
321 static const char* plus_minus_num(const char* str)
323 if (*str == '-' || *str == '+')
329 static action*** parse_params(char **argv)
332 unsigned cur_group = 0;
333 unsigned cur_action = 0;
335 action* alloc_action(int sizeof_struct, action_fp f)
338 appp[cur_group] = xrealloc(appp[cur_group], (cur_action+2) * sizeof(*appp));
339 appp[cur_group][cur_action++] = ap = xmalloc(sizeof_struct);
340 appp[cur_group][cur_action] = NULL;
344 #define ALLOC_ACTION(name) (action_##name*)alloc_action(sizeof(action_##name), (action_fp) func_##name)
346 appp = xzalloc(2 * sizeof(*appp)); /* appp[0],[1] == NULL */
348 // Actions have side effects and return a true or false value
349 // We implement: -print, -print0, -exec
351 // The rest are tests.
353 // Tests and actions are grouped by operators
354 // ( expr ) Force precedence
355 // ! expr True if expr is false
356 // -not expr Same as ! expr
357 // expr1 [-a[nd]] expr2 And; expr2 is not evaluated if expr1 is false
358 // expr1 -o[r] expr2 Or; expr2 is not evaluated if expr1 is true
359 // expr1 , expr2 List; both expr1 and expr2 are always evaluated
360 // We implement: (), -a, -o
362 //XXX: TODO: Use index_in_str_array here
364 const char *arg = argv[0];
365 const char *arg1 = argv[1];
366 /* --- Operators --- */
367 if (strcmp(arg, "-a") == 0
368 USE_DESKTOP(|| strcmp(arg, "-and") == 0)
370 /* no special handling required */
372 else if (strcmp(arg, "-o") == 0
373 USE_DESKTOP(|| strcmp(arg, "-or") == 0)
375 /* start new OR group */
377 appp = xrealloc(appp, (cur_group+2) * sizeof(*appp));
378 appp[cur_group] = NULL;
379 appp[cur_group+1] = NULL;
383 /* --- Tests and actions --- */
384 else if (strcmp(arg, "-print") == 0) {
386 (void) ALLOC_ACTION(print);
388 #if ENABLE_FEATURE_FIND_PRINT0
389 else if (strcmp(arg, "-print0") == 0) {
391 (void) ALLOC_ACTION(print0);
394 else if (strcmp(arg, "-name") == 0) {
397 bb_error_msg_and_die(bb_msg_requires_arg, arg);
398 ap = ALLOC_ACTION(name);
401 #if ENABLE_FEATURE_FIND_TYPE
402 else if (strcmp(arg, "-type") == 0) {
405 bb_error_msg_and_die(bb_msg_requires_arg, arg);
406 ap = ALLOC_ACTION(type);
407 ap->type_mask = find_type(arg1);
410 #if ENABLE_FEATURE_FIND_PERM
412 * -perm mode File's permission bits are exactly mode (octal or symbolic).
413 * Symbolic modes use mode 0 as a point of departure.
414 * -perm -mode All of the permission bits mode are set for the file.
415 * -perm +mode Any of the permission bits mode are set for the file.
417 else if (strcmp(arg, "-perm") == 0) {
420 bb_error_msg_and_die(bb_msg_requires_arg, arg);
421 ap = ALLOC_ACTION(perm);
422 ap->perm_char = arg1[0];
423 arg1 = plus_minus_num(arg1);
425 if (!bb_parse_mode(arg1, &ap->perm_mask))
426 bb_error_msg_and_die("invalid mode: %s", arg1);
429 #if ENABLE_FEATURE_FIND_MTIME
430 else if (strcmp(arg, "-mtime") == 0) {
433 bb_error_msg_and_die(bb_msg_requires_arg, arg);
434 ap = ALLOC_ACTION(mtime);
435 ap->mtime_char = arg1[0];
436 ap->mtime_days = xatoul(plus_minus_num(arg1));
439 #if ENABLE_FEATURE_FIND_MMIN
440 else if (strcmp(arg, "-mmin") == 0) {
443 bb_error_msg_and_die(bb_msg_requires_arg, arg);
444 ap = ALLOC_ACTION(mmin);
445 ap->mmin_char = arg1[0];
446 ap->mmin_mins = xatoul(plus_minus_num(arg1));
449 #if ENABLE_FEATURE_FIND_NEWER
450 else if (strcmp(arg, "-newer") == 0) {
452 struct stat stat_newer;
454 bb_error_msg_and_die(bb_msg_requires_arg, arg);
455 xstat(arg1, &stat_newer);
456 ap = ALLOC_ACTION(newer);
457 ap->newer_mtime = stat_newer.st_mtime;
460 #if ENABLE_FEATURE_FIND_INUM
461 else if (strcmp(arg, "-inum") == 0) {
464 bb_error_msg_and_die(bb_msg_requires_arg, arg);
465 ap = ALLOC_ACTION(inum);
466 ap->inode_num = xatoul(arg1);
469 #if ENABLE_FEATURE_FIND_EXEC
470 else if (strcmp(arg, "-exec") == 0) {
474 ap = ALLOC_ACTION(exec);
475 ap->exec_argv = ++argv; /* first arg after -exec */
478 if (!*argv) /* did not see ';' till end */
479 bb_error_msg_and_die(bb_msg_requires_arg, arg);
480 if (LONE_CHAR(argv[0], ';'))
485 if (ap->exec_argc == 0)
486 bb_error_msg_and_die(bb_msg_requires_arg, arg);
487 ap->subst_count = xmalloc(ap->exec_argc * sizeof(int));
490 ap->subst_count[i] = count_subst(ap->exec_argv[i]);
493 #if ENABLE_FEATURE_FIND_USER
494 else if (strcmp(arg, "-user") == 0) {
497 bb_error_msg_and_die(bb_msg_requires_arg, arg);
498 ap = ALLOC_ACTION(user);
499 ap->uid = bb_strtou(arg1, NULL, 10);
501 ap->uid = xuname2uid(arg1);
505 else if (LONE_CHAR(arg, '(')) {
513 bb_error_msg_and_die("unpaired '('");
514 if (LONE_CHAR(*endarg, '('))
516 else if (LONE_CHAR(*endarg, ')') && !--nested) {
521 ap = ALLOC_ACTION(paren);
522 ap->subexpr = parse_params(argv + 1);
523 *endarg = (char*) ")"; /* restore NULLed parameter */
526 else if (strcmp(arg, "-prune") == 0) {
527 (void) ALLOC_ACTION(prune);
529 else if (strcmp(arg, "-size") == 0) {
532 bb_error_msg_and_die(bb_msg_requires_arg, arg);
533 ap = ALLOC_ACTION(size);
534 ap->size = XATOOFF(arg1);
547 int find_main(int argc, char **argv);
548 int find_main(int argc, char **argv)
550 int dereference = FALSE;
553 int i, firstopt, status = EXIT_SUCCESS;
555 for (firstopt = 1; firstopt < argc; firstopt++) {
556 if (argv[firstopt][0] == '-')
559 if (LONE_CHAR(argv[firstopt], '('))
564 argv[0] = (char*)".";
569 // All options always return true. They always take effect,
570 // rather than being processed only when their place in the
571 // expression is reached
572 // We implement: -follow, -xdev
574 /* Process options, and replace then with -a */
575 /* (-a will be ignored by recursive parser later) */
576 argp = &argv[firstopt];
577 while ((arg = argp[0])) {
578 if (strcmp(arg, "-follow") == 0) {
580 argp[0] = (char*)"-a";
582 #if ENABLE_FEATURE_FIND_XDEV
583 else if (strcmp(arg, "-xdev") == 0) {
586 xdev_count = firstopt - 1;
587 xdev_dev = xmalloc(xdev_count * sizeof(dev_t));
588 for (i = 1; i < firstopt; i++) {
589 /* not xstat(): shouldn't bomb out on
590 * "find not_exist exist -xdev" */
591 if (stat(argv[i], &stbuf))
593 xdev_dev[i-1] = stbuf.st_dev;
596 argp[0] = (char*)"-a";
602 actions = parse_params(&argv[firstopt]);
604 for (i = 1; i < firstopt; i++) {
605 if (!recursive_action(argv[i],
607 dereference, // follow links
608 FALSE, // depth first
609 fileAction, // file action
610 fileAction, // dir action
613 status = EXIT_FAILURE;