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 //config:config FIND
57 //config:	bool "find"
58 //config:	default y
59 //config:	help
60 //config:	  find is used to search your system to find specified files.
61 //config:
62 //config:config FEATURE_FIND_PRINT0
63 //config:	bool "Enable -print0: NUL-terminated output"
64 //config:	default y
65 //config:	depends on FIND
66 //config:	help
67 //config:	  Causes output names to be separated by a NUL character
68 //config:	  rather than a newline. This allows names that contain
69 //config:	  newlines and other whitespace to be more easily
70 //config:	  interpreted by other programs.
71 //config:
72 //config:config FEATURE_FIND_MTIME
73 //config:	bool "Enable -mtime: modified time matching"
74 //config:	default y
75 //config:	depends on FIND
76 //config:	help
77 //config:	  Allow searching based on the modification time of
78 //config:	  files, in days.
79 //config:
80 //config:config FEATURE_FIND_MMIN
81 //config:	bool "Enable -mmin: modified time matching by minutes"
82 //config:	default y
83 //config:	depends on FIND
84 //config:	help
85 //config:	  Allow searching based on the modification time of
86 //config:	  files, in minutes.
87 //config:
88 //config:config FEATURE_FIND_PERM
89 //config:	bool "Enable -perm: permissions matching"
90 //config:	default y
91 //config:	depends on FIND
92 //config:	help
93 //config:	  Enable searching based on file permissions.
94 //config:
95 //config:config FEATURE_FIND_TYPE
96 //config:	bool "Enable -type: file type matching (file/dir/link/...)"
97 //config:	default y
98 //config:	depends on FIND
99 //config:	help
100 //config:	  Enable searching based on file type (file,
101 //config:	  directory, socket, device, etc.).
102 //config:
103 //config:config FEATURE_FIND_XDEV
104 //config:	bool "Enable -xdev: 'stay in filesystem'"
105 //config:	default y
106 //config:	depends on FIND
107 //config:	help
108 //config:	  This option allows find to restrict searches to a single filesystem.
109 //config:
110 //config:config FEATURE_FIND_MAXDEPTH
111 //config:	bool "Enable -mindepth N and -maxdepth N"
112 //config:	default y
113 //config:	depends on FIND
114 //config:	help
115 //config:	  This option enables -mindepth N and -maxdepth N option.
116 //config:
117 //config:config FEATURE_FIND_NEWER
118 //config:	bool "Enable -newer: compare file modification times"
119 //config:	default y
120 //config:	depends on FIND
121 //config:	help
122 //config:	  Support the 'find -newer' option for finding any files which have
123 //config:	  modification time that is more recent than the specified FILE.
124 //config:
125 //config:config FEATURE_FIND_INUM
126 //config:	bool "Enable -inum: inode number matching"
127 //config:	default y
128 //config:	depends on FIND
129 //config:	help
130 //config:	  Support the 'find -inum' option for searching by inode number.
131 //config:
132 //config:config FEATURE_FIND_EXEC
133 //config:	bool "Enable -exec: execute commands"
134 //config:	default y
135 //config:	depends on FIND
136 //config:	help
137 //config:	  Support the 'find -exec' option for executing commands based upon
138 //config:	  the files matched.
139 //config:
140 //config:config FEATURE_FIND_EXEC_PLUS
141 //config:	bool "Enable -exec ... {} +"
142 //config:	default y
143 //config:	depends on FEATURE_FIND_EXEC
144 //config:	help
145 //config:	  Support the 'find -exec ... {} +' option for executing commands
146 //config:	  for all matched files at once.
147 //config:	  Without this option, -exec + is a synonym for -exec ;
148 //config:	  (IOW: it works correctly, but without expected speedup)
149 //config:
150 //config:config FEATURE_FIND_USER
151 //config:	bool "Enable -user: username/uid matching"
152 //config:	default y
153 //config:	depends on FIND
154 //config:	help
155 //config:	  Support the 'find -user' option for searching by username or uid.
156 //config:
157 //config:config FEATURE_FIND_GROUP
158 //config:	bool "Enable -group: group/gid matching"
159 //config:	default y
160 //config:	depends on FIND
161 //config:	help
162 //config:	  Support the 'find -group' option for searching by group name or gid.
163 //config:
164 //config:config FEATURE_FIND_NOT
165 //config:	bool "Enable the 'not' (!) operator"
166 //config:	default y
167 //config:	depends on FIND
168 //config:	help
169 //config:	  Support the '!' operator to invert the test results.
170 //config:	  If 'Enable full-blown desktop' is enabled, then will also support
171 //config:	  the non-POSIX notation '-not'.
172 //config:
173 //config:config FEATURE_FIND_DEPTH
174 //config:	bool "Enable -depth"
175 //config:	default y
176 //config:	depends on FIND
177 //config:	help
178 //config:	  Process each directory's contents before the directory itself.
179 //config:
180 //config:config FEATURE_FIND_PAREN
181 //config:	bool "Enable parens in options"
182 //config:	default y
183 //config:	depends on FIND
184 //config:	help
185 //config:	  Enable usage of parens '(' to specify logical order of arguments.
186 //config:
187 //config:config FEATURE_FIND_SIZE
188 //config:	bool "Enable -size: file size matching"
189 //config:	default y
190 //config:	depends on FIND
191 //config:	help
192 //config:	  Support the 'find -size' option for searching by file size.
193 //config:
194 //config:config FEATURE_FIND_PRUNE
195 //config:	bool "Enable -prune: exclude subdirectories"
196 //config:	default y
197 //config:	depends on FIND
198 //config:	help
199 //config:	  If the file is a directory, dont descend into it. Useful for
200 //config:	  exclusion .svn and CVS directories.
201 //config:
202 //config:config FEATURE_FIND_DELETE
203 //config:	bool "Enable -delete: delete files/dirs"
204 //config:	default y
205 //config:	depends on FIND && FEATURE_FIND_DEPTH
206 //config:	help
207 //config:	  Support the 'find -delete' option for deleting files and directories.
208 //config:	  WARNING: This option can do much harm if used wrong. Busybox will not
209 //config:	  try to protect the user from doing stupid things. Use with care.
210 //config:
211 //config:config FEATURE_FIND_PATH
212 //config:	bool "Enable -path: match pathname with shell pattern"
213 //config:	default y
214 //config:	depends on FIND
215 //config:	help
216 //config:	  The -path option matches whole pathname instead of just filename.
217 //config:
218 //config:config FEATURE_FIND_REGEX
219 //config:	bool "Enable -regex: match pathname with regex"
220 //config:	default y
221 //config:	depends on FIND
222 //config:	help
223 //config:	  The -regex option matches whole pathname against regular expression.
224 //config:
225 //config:config FEATURE_FIND_CONTEXT
226 //config:	bool "Enable -context: security context matching"
227 //config:	default n
228 //config:	depends on FIND && SELINUX
229 //config:	help
230 //config:	  Support the 'find -context' option for matching security context.
231 //config:
232 //config:config FEATURE_FIND_LINKS
233 //config:	bool "Enable -links: link count matching"
234 //config:	default y
235 //config:	depends on FIND
236 //config:	help
237 //config:	  Support the 'find -links' option for matching number of links.
238 
239 //applet:IF_FIND(APPLET_NOEXEC(find, find, BB_DIR_USR_BIN, BB_SUID_DROP, find))
240 
241 //kbuild:lib-$(CONFIG_FIND) += find.o
242 
243 //usage:#define find_trivial_usage
244 //usage:       "[-HL] [PATH]... [OPTIONS] [ACTIONS]"
245 //usage:#define find_full_usage "\n\n"
246 //usage:       "Search for files and perform actions on them.\n"
247 //usage:       "First failed action stops processing of current file.\n"
248 //usage:       "Defaults: PATH is current directory, action is '-print'\n"
249 //usage:     "\n	-L,-follow	Follow symlinks"
250 //usage:     "\n	-H		...on command line only"
251 //usage:	IF_FEATURE_FIND_XDEV(
252 //usage:     "\n	-xdev		Don't descend directories on other filesystems"
253 //usage:	)
254 //usage:	IF_FEATURE_FIND_MAXDEPTH(
255 //usage:     "\n	-maxdepth N	Descend at most N levels. -maxdepth 0 applies"
256 //usage:     "\n			actions to command line arguments only"
257 //usage:     "\n	-mindepth N	Don't act on first N levels"
258 //usage:	)
259 //usage:	IF_FEATURE_FIND_DEPTH(
260 //usage:     "\n	-depth		Act on directory *after* traversing it"
261 //usage:	)
262 //usage:     "\n"
263 //usage:     "\nActions:"
264 //usage:	IF_FEATURE_FIND_PAREN(
265 //usage:     "\n	( ACTIONS )	Group actions for -o / -a"
266 //usage:	)
267 //usage:	IF_FEATURE_FIND_NOT(
268 //usage:     "\n	! ACT		Invert ACT's success/failure"
269 //usage:	)
270 //usage:     "\n	ACT1 [-a] ACT2	If ACT1 fails, stop, else do ACT2"
271 //usage:     "\n	ACT1 -o ACT2	If ACT1 succeeds, stop, else do ACT2"
272 //usage:     "\n			Note: -a has higher priority than -o"
273 //usage:     "\n	-name PATTERN	Match file name (w/o directory name) to PATTERN"
274 //usage:     "\n	-iname PATTERN	Case insensitive -name"
275 //usage:	IF_FEATURE_FIND_PATH(
276 //usage:     "\n	-path PATTERN	Match path to PATTERN"
277 //usage:     "\n	-ipath PATTERN	Case insensitive -path"
278 //usage:	)
279 //usage:	IF_FEATURE_FIND_REGEX(
280 //usage:     "\n	-regex PATTERN	Match path to regex PATTERN"
281 //usage:	)
282 //usage:	IF_FEATURE_FIND_TYPE(
283 //usage:     "\n	-type X		File type is X (one of: f,d,l,b,c,...)"
284 //usage:	)
285 //usage:	IF_FEATURE_FIND_PERM(
286 //usage:     "\n	-perm MASK	At least one mask bit (+MASK), all bits (-MASK),"
287 //usage:     "\n			or exactly MASK bits are set in file's mode"
288 //usage:	)
289 //usage:	IF_FEATURE_FIND_MTIME(
290 //usage:     "\n	-mtime DAYS	mtime is greater than (+N), less than (-N),"
291 //usage:     "\n			or exactly N days in the past"
292 //usage:	)
293 //usage:	IF_FEATURE_FIND_MMIN(
294 //usage:     "\n	-mmin MINS	mtime is greater than (+N), less than (-N),"
295 //usage:     "\n			or exactly N minutes in the past"
296 //usage:	)
297 //usage:	IF_FEATURE_FIND_NEWER(
298 //usage:     "\n	-newer FILE	mtime is more recent than FILE's"
299 //usage:	)
300 //usage:	IF_FEATURE_FIND_INUM(
301 //usage:     "\n	-inum N		File has inode number N"
302 //usage:	)
303 //usage:	IF_FEATURE_FIND_USER(
304 //usage:     "\n	-user NAME/ID	File is owned by given user"
305 //usage:	)
306 //usage:	IF_FEATURE_FIND_GROUP(
307 //usage:     "\n	-group NAME/ID	File is owned by given group"
308 //usage:	)
309 //usage:	IF_FEATURE_FIND_SIZE(
310 //usage:     "\n	-size N[bck]	File size is N (c:bytes,k:kbytes,b:512 bytes(def.))"
311 //usage:     "\n			+/-N: file size is bigger/smaller than N"
312 //usage:	)
313 //usage:	IF_FEATURE_FIND_LINKS(
314 //usage:     "\n	-links N	Number of links is greater than (+N), less than (-N),"
315 //usage:     "\n			or exactly N"
316 //usage:	)
317 //usage:	IF_FEATURE_FIND_CONTEXT(
318 //usage:     "\n	-context CTX	File has specified security context"
319 //usage:	)
320 //usage:	IF_FEATURE_FIND_PRUNE(
321 //usage:     "\n	-prune		If current file is directory, don't descend into it"
322 //usage:	)
323 //usage:     "\nIf none of the following actions is specified, -print is assumed"
324 //usage:     "\n	-print		Print file name"
325 //usage:	IF_FEATURE_FIND_PRINT0(
326 //usage:     "\n	-print0		Print file name, NUL terminated"
327 //usage:	)
328 //usage:	IF_FEATURE_FIND_EXEC(
329 //usage:     "\n	-exec CMD ARG ;	Run CMD with all instances of {} replaced by"
330 //usage:     "\n			file name. Fails if CMD exits with nonzero"
331 //usage:	)
332 //usage:	IF_FEATURE_FIND_EXEC_PLUS(
333 //usage:     "\n	-exec CMD ARG + Run CMD with {} replaced by list of file names"
334 //usage:	)
335 //usage:	IF_FEATURE_FIND_DELETE(
336 //usage:     "\n	-delete		Delete current file/directory. Turns on -depth option"
337 //usage:	)
338 //usage:
339 //usage:#define find_example_usage
340 //usage:       "$ find / -name passwd\n"
341 //usage:       "/etc/passwd\n"
342 
343 #include <fnmatch.h>
344 #include "libbb.h"
345 #include "common_bufsiz.h"
346 #if ENABLE_FEATURE_FIND_REGEX
347 # include "xregex.h"
348 #endif
349 /* GNUism: */
350 #ifndef FNM_CASEFOLD
351 # define FNM_CASEFOLD 0
352 #endif
353 
354 #if 1
355 # define dbg(...) ((void)0)
356 #else
357 # define dbg(...) bb_error_msg(__VA_ARGS__)
358 #endif
359 
360 
361 /* This is a NOEXEC applet. Be very careful! */
362 
363 
364 typedef int (*action_fp)(const char *fileName, const struct stat *statbuf, void *) FAST_FUNC;
365 
366 typedef struct {
367 	action_fp f;
368 #if ENABLE_FEATURE_FIND_NOT
369 	bool invert;
370 #endif
371 } action;
372 
373 #define ACTS(name, ...) typedef struct { action a; __VA_ARGS__ } action_##name;
374 #define ACTF(name) \
375 	static int FAST_FUNC func_##name(const char *fileName UNUSED_PARAM, \
376 		const struct stat *statbuf UNUSED_PARAM, \
377 		action_##name* ap UNUSED_PARAM)
378 
379                         ACTS(print)
380                         ACTS(name,  const char *pattern; bool iname;)
381 IF_FEATURE_FIND_PATH(   ACTS(path,  const char *pattern; bool ipath;))
382 IF_FEATURE_FIND_REGEX(  ACTS(regex, regex_t compiled_pattern;))
383 IF_FEATURE_FIND_PRINT0( ACTS(print0))
384 IF_FEATURE_FIND_TYPE(   ACTS(type,  int type_mask;))
385 IF_FEATURE_FIND_PERM(   ACTS(perm,  char perm_char; mode_t perm_mask;))
386 IF_FEATURE_FIND_MTIME(  ACTS(mtime, char mtime_char; unsigned mtime_days;))
387 IF_FEATURE_FIND_MMIN(   ACTS(mmin,  char mmin_char; unsigned mmin_mins;))
388 IF_FEATURE_FIND_NEWER(  ACTS(newer, time_t newer_mtime;))
389 IF_FEATURE_FIND_INUM(   ACTS(inum,  ino_t inode_num;))
390 IF_FEATURE_FIND_USER(   ACTS(user,  uid_t uid;))
391 IF_FEATURE_FIND_SIZE(   ACTS(size,  char size_char; off_t size;))
392 IF_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;))
393 IF_FEATURE_FIND_PAREN(  ACTS(paren, action ***subexpr;))
394 IF_FEATURE_FIND_PRUNE(  ACTS(prune))
395 IF_FEATURE_FIND_DELETE( ACTS(delete))
396 IF_FEATURE_FIND_EXEC(   ACTS(exec,
397 				char **exec_argv; /* -exec ARGS */
398 				unsigned *subst_count;
399 				int exec_argc; /* count of ARGS */
400 				IF_FEATURE_FIND_EXEC_PLUS(
401 					/*
402 					 * filelist is NULL if "exec ;"
403 					 * non-NULL if "exec +"
404 					 */
405 					char **filelist;
406 					int filelist_idx;
407 					int file_len;
408 				)
409 				))
410 IF_FEATURE_FIND_GROUP(  ACTS(group, gid_t gid;))
411 IF_FEATURE_FIND_LINKS(  ACTS(links, char links_char; int links_count;))
412 
413 struct globals {
414 	IF_FEATURE_FIND_XDEV(dev_t *xdev_dev;)
415 	IF_FEATURE_FIND_XDEV(int xdev_count;)
416 #if ENABLE_FEATURE_FIND_MAXDEPTH
417 	int minmaxdepth[2];
418 #endif
419 	action ***actions;
420 	smallint need_print;
421 	smallint xdev_on;
422 	recurse_flags_t recurse_flags;
423 	IF_FEATURE_FIND_EXEC_PLUS(unsigned max_argv_len;)
424 } FIX_ALIASING;
425 #define G (*(struct globals*)bb_common_bufsiz1)
426 #define INIT_G() do { \
427 	setup_common_bufsiz(); \
428 	BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
429 	/* we have to zero it out because of NOEXEC */ \
430 	memset(&G, 0, sizeof(G)); \
431 	IF_FEATURE_FIND_MAXDEPTH(G.minmaxdepth[1] = INT_MAX;) \
432 	IF_FEATURE_FIND_EXEC_PLUS(G.max_argv_len = bb_arg_max() - 2048;) \
433 	G.need_print = 1; \
434 	G.recurse_flags = ACTION_RECURSE; \
435 } while (0)
436 
437 /* Return values of ACTFs ('action functions') are a bit mask:
438  * bit 1=1: prune (use SKIP constant for setting it)
439  * bit 0=1: matched successfully (TRUE)
440  */
441 
exec_actions(action *** appp,const char * fileName,const struct stat * statbuf)442 static int exec_actions(action ***appp, const char *fileName, const struct stat *statbuf)
443 {
444 	int cur_group;
445 	int cur_action;
446 	int rc = 0;
447 	action **app, *ap;
448 
449 	/* "action group" is a set of actions ANDed together.
450 	 * groups are ORed together.
451 	 * We simply evaluate each group until we find one in which all actions
452 	 * succeed. */
453 
454 	/* -prune is special: if it is encountered, then we won't
455 	 * descend into current directory. It doesn't matter whether
456 	 * action group (in which -prune sits) will succeed or not:
457 	 * find * -prune -name 'f*' -o -name 'm*' -- prunes every dir
458 	 * find * -name 'f*' -o -prune -name 'm*' -- prunes all dirs
459 	 *     not starting with 'f' */
460 
461 	/* We invert TRUE bit (bit 0). Now 1 there means 'failure'.
462 	 * and bitwise OR in "rc |= TRUE ^ ap->f()" will:
463 	 * (1) make SKIP (-prune) bit stick; and (2) detect 'failure'.
464 	 * On return, bit is restored.  */
465 
466 	cur_group = -1;
467 	while ((app = appp[++cur_group]) != NULL) {
468 		rc &= ~TRUE; /* 'success' so far, clear TRUE bit */
469 		cur_action = -1;
470 		while (1) {
471 			ap = app[++cur_action];
472 			if (!ap) /* all actions in group were successful */
473 				return rc ^ TRUE; /* restore TRUE bit */
474 			rc |= TRUE ^ ap->f(fileName, statbuf, ap);
475 #if ENABLE_FEATURE_FIND_NOT
476 			if (ap->invert) rc ^= TRUE;
477 #endif
478 			dbg("grp %d action %d rc:0x%x", cur_group, cur_action, rc);
479 			if (rc & TRUE) /* current group failed, try next */
480 				break;
481 		}
482 	}
483 	dbg("returning:0x%x", rc ^ TRUE);
484 	return rc ^ TRUE; /* restore TRUE bit */
485 }
486 
487 #if !FNM_CASEFOLD
strcpy_upcase(char * dst,const char * src)488 static char *strcpy_upcase(char *dst, const char *src)
489 {
490 	char *d = dst;
491 	while (1) {
492 		unsigned char ch = *src++;
493 		if (ch >= 'a' && ch <= 'z')
494 			ch -= ('a' - 'A');
495 		*d++ = ch;
496 		if (ch == '\0')
497 			break;
498 	}
499 	return dst;
500 }
501 #endif
502 
ACTF(name)503 ACTF(name)
504 {
505 	int r;
506 	const char *tmp = bb_basename(fileName);
507 	/* GNU findutils: find DIR/ -name DIR
508 	 * prints "DIR/" (DIR// prints "DIR//" etc).
509 	 * Need to strip trailing "/".
510 	 * Such names can come only from top-level names, but
511 	 * we can't do this before recursive_action() call,
512 	 * since then "find FILE/ -name FILE"
513 	 * would also work (on non-directories), which is wrong.
514 	 */
515 	char *trunc_slash = NULL;
516 
517 	if (*tmp == '\0') {
518 		/* "foo/bar/[//...]" */
519 		while (tmp != fileName && tmp[-1] == '/')
520 			tmp--;
521 		if (tmp == fileName) { /* entire fileName is "//.."? */
522 			/* yes, convert "//..." to "/"
523 			 * Testcases:
524 			 * find / -maxdepth 1 -name /: prints /
525 			 * find // -maxdepth 1 -name /: prints //
526 			 * find / -maxdepth 1 -name //: prints nothing
527 			 * find // -maxdepth 1 -name //: prints nothing
528 			 */
529 			if (tmp[1])
530 				trunc_slash = (char*)tmp + 1;
531 		} else {
532 			/* no, it's "foo/bar/[//...]", go back to 'b' */
533 			trunc_slash = (char*)tmp;
534 			while (tmp != fileName && tmp[-1] != '/')
535 				tmp--;
536 		}
537 	}
538 
539 	/* Was using FNM_PERIOD flag too,
540 	 * but somewhere between 4.1.20 and 4.4.0 GNU find stopped using it.
541 	 * find -name '*foo' should match .foo too:
542 	 */
543 	if (trunc_slash) *trunc_slash = '\0';
544 #if FNM_CASEFOLD
545 	r = fnmatch(ap->pattern, tmp, (ap->iname ? FNM_CASEFOLD : 0));
546 #else
547 	if (ap->iname)
548 		tmp = strcpy_upcase(alloca(strlen(tmp) + 1), tmp);
549 	r = fnmatch(ap->pattern, tmp, 0);
550 #endif
551 	if (trunc_slash) *trunc_slash = '/';
552 	return r == 0;
553 }
554 
555 #if ENABLE_FEATURE_FIND_PATH
ACTF(path)556 ACTF(path)
557 {
558 # if FNM_CASEFOLD
559 	return fnmatch(ap->pattern, fileName, (ap->ipath ? FNM_CASEFOLD : 0)) == 0;
560 # else
561 	if (ap->ipath)
562 		fileName = strcpy_upcase(alloca(strlen(fileName) + 1), fileName);
563 	return fnmatch(ap->pattern, fileName, 0) == 0;
564 # endif
565 }
566 #endif
567 #if ENABLE_FEATURE_FIND_REGEX
ACTF(regex)568 ACTF(regex)
569 {
570 	regmatch_t match;
571 	if (regexec(&ap->compiled_pattern, fileName, 1, &match, 0 /*eflags*/))
572 		return 0; /* no match */
573 	if (match.rm_so)
574 		return 0; /* match doesn't start at pos 0 */
575 	if (fileName[match.rm_eo])
576 		return 0; /* match doesn't end exactly at end of pathname */
577 	return 1;
578 }
579 #endif
580 #if ENABLE_FEATURE_FIND_TYPE
ACTF(type)581 ACTF(type)
582 {
583 	return ((statbuf->st_mode & S_IFMT) == ap->type_mask);
584 }
585 #endif
586 #if ENABLE_FEATURE_FIND_PERM
ACTF(perm)587 ACTF(perm)
588 {
589 	/* -perm [+/]mode: at least one of perm_mask bits are set */
590 	if (ap->perm_char == '+' || ap->perm_char == '/')
591 		return (statbuf->st_mode & ap->perm_mask) != 0;
592 	/* -perm -mode: all of perm_mask are set */
593 	if (ap->perm_char == '-')
594 		return (statbuf->st_mode & ap->perm_mask) == ap->perm_mask;
595 	/* -perm mode: file mode must match perm_mask */
596 	return (statbuf->st_mode & 07777) == ap->perm_mask;
597 }
598 #endif
599 #if ENABLE_FEATURE_FIND_MTIME
ACTF(mtime)600 ACTF(mtime)
601 {
602 	time_t file_age = time(NULL) - statbuf->st_mtime;
603 	time_t mtime_secs = ap->mtime_days * 24*60*60;
604 	if (ap->mtime_char == '+')
605 		return file_age >= mtime_secs + 24*60*60;
606 	if (ap->mtime_char == '-')
607 		return file_age < mtime_secs;
608 	/* just numeric mtime */
609 	return file_age >= mtime_secs && file_age < (mtime_secs + 24*60*60);
610 }
611 #endif
612 #if ENABLE_FEATURE_FIND_MMIN
ACTF(mmin)613 ACTF(mmin)
614 {
615 	time_t file_age = time(NULL) - statbuf->st_mtime;
616 	time_t mmin_secs = ap->mmin_mins * 60;
617 	if (ap->mmin_char == '+')
618 		return file_age >= mmin_secs + 60;
619 	if (ap->mmin_char == '-')
620 		return file_age < mmin_secs;
621 	/* just numeric mmin */
622 	return file_age >= mmin_secs && file_age < (mmin_secs + 60);
623 }
624 #endif
625 #if ENABLE_FEATURE_FIND_NEWER
ACTF(newer)626 ACTF(newer)
627 {
628 	return (ap->newer_mtime < statbuf->st_mtime);
629 }
630 #endif
631 #if ENABLE_FEATURE_FIND_INUM
ACTF(inum)632 ACTF(inum)
633 {
634 	return (statbuf->st_ino == ap->inode_num);
635 }
636 #endif
637 #if ENABLE_FEATURE_FIND_EXEC
do_exec(action_exec * ap,const char * fileName)638 static int do_exec(action_exec *ap, const char *fileName)
639 {
640 	int i, rc;
641 # if ENABLE_FEATURE_FIND_EXEC_PLUS
642 	int size = ap->exec_argc + ap->filelist_idx + 1;
643 # else
644 	int size = ap->exec_argc + 1;
645 # endif
646 # if ENABLE_USE_PORTABLE_CODE
647 	char **argv = alloca(sizeof(char*) * size);
648 # else /* gcc 4.3.1 generates smaller code: */
649 	char *argv[size];
650 # endif
651 	char **pp = argv;
652 
653 	for (i = 0; i < ap->exec_argc; i++) {
654 		const char *arg = ap->exec_argv[i];
655 
656 # if ENABLE_FEATURE_FIND_EXEC_PLUS
657 		if (ap->filelist) {
658 			/* Handling "-exec +"
659 			 * Only one exec_argv[i] has substitution in it.
660 			 * Expand that one exec_argv[i] into file list.
661 			 */
662 			if (ap->subst_count[i] == 0) {
663 				*pp++ = xstrdup(arg);
664 			} else {
665 				int j = 0;
666 				while (ap->filelist[j]) {
667 					/* 2nd arg here should be ap->subst_count[i], but it is always 1: */
668 					*pp++ = xmalloc_substitute_string(arg, 1, "{}", ap->filelist[j]);
669 					free(ap->filelist[j]);
670 					j++;
671 				}
672 			}
673 		} else
674 # endif
675 		{
676 			/* Handling "-exec ;" */
677 			*pp++ = xmalloc_substitute_string(arg, ap->subst_count[i], "{}", fileName);
678 		}
679 	}
680 	*pp = NULL; /* terminate the list */
681 
682 # if ENABLE_FEATURE_FIND_EXEC_PLUS
683 	if (ap->filelist) {
684 		ap->filelist[0] = NULL;
685 		ap->filelist_idx = 0;
686 		ap->file_len = 0;
687 	}
688 # endif
689 
690 	rc = spawn_and_wait(argv);
691 	if (rc < 0)
692 		bb_simple_perror_msg(argv[0]);
693 
694 	i = 0;
695 	while (argv[i])
696 		free(argv[i++]);
697 	return rc == 0; /* return 1 if exitcode 0 */
698 }
ACTF(exec)699 ACTF(exec)
700 {
701 # if ENABLE_FEATURE_FIND_EXEC_PLUS
702 	if (ap->filelist) {
703 		int rc;
704 
705 		ap->filelist = xrealloc_vector(ap->filelist, 8, ap->filelist_idx);
706 		ap->filelist[ap->filelist_idx++] = xstrdup(fileName);
707 		ap->file_len += strlen(fileName) + sizeof(char*) + 1;
708 		/* If we have lots of files already, exec the command */
709 		rc = 1;
710 		if (ap->file_len >= G.max_argv_len)
711 			rc = do_exec(ap, NULL);
712 		return rc;
713 	}
714 # endif
715 	return do_exec(ap, fileName);
716 }
717 # if ENABLE_FEATURE_FIND_EXEC_PLUS
flush_exec_plus(void)718 static int flush_exec_plus(void)
719 {
720 	action *ap;
721 	action **app;
722 	action ***appp = G.actions;
723 	while ((app = *appp++) != NULL) {
724 		while ((ap = *app++) != NULL) {
725 			if (ap->f == (action_fp)func_exec) {
726 				action_exec *ae = (void*)ap;
727 				if (ae->filelist_idx != 0) {
728 					int rc = do_exec(ae, NULL);
729 #  if ENABLE_FEATURE_FIND_NOT
730 					if (ap->invert) rc = !rc;
731 #  endif
732 					if (rc == 0)
733 						return 1;
734 				}
735 			}
736 		}
737 	}
738 	return 0;
739 }
740 # endif
741 #endif
742 #if ENABLE_FEATURE_FIND_USER
ACTF(user)743 ACTF(user)
744 {
745 	return (statbuf->st_uid == ap->uid);
746 }
747 #endif
748 #if ENABLE_FEATURE_FIND_GROUP
ACTF(group)749 ACTF(group)
750 {
751 	return (statbuf->st_gid == ap->gid);
752 }
753 #endif
754 #if ENABLE_FEATURE_FIND_PRINT0
ACTF(print0)755 ACTF(print0)
756 {
757 	printf("%s%c", fileName, '\0');
758 	return TRUE;
759 }
760 #endif
ACTF(print)761 ACTF(print)
762 {
763 	puts(fileName);
764 	return TRUE;
765 }
766 #if ENABLE_FEATURE_FIND_PAREN
ACTF(paren)767 ACTF(paren)
768 {
769 	return exec_actions(ap->subexpr, fileName, statbuf);
770 }
771 #endif
772 #if ENABLE_FEATURE_FIND_SIZE
ACTF(size)773 ACTF(size)
774 {
775 	if (ap->size_char == '+')
776 		return statbuf->st_size > ap->size;
777 	if (ap->size_char == '-')
778 		return statbuf->st_size < ap->size;
779 	return statbuf->st_size == ap->size;
780 }
781 #endif
782 #if ENABLE_FEATURE_FIND_PRUNE
783 /*
784  * -prune: if -depth is not given, return true and do not descend
785  * current dir; if -depth is given, return false with no effect.
786  * Example:
787  * find dir -name 'asm-*' -prune -o -name '*.[chS]' -print
788  */
ACTF(prune)789 ACTF(prune)
790 {
791 	return SKIP + TRUE;
792 }
793 #endif
794 #if ENABLE_FEATURE_FIND_DELETE
ACTF(delete)795 ACTF(delete)
796 {
797 	int rc;
798 	if (S_ISDIR(statbuf->st_mode)) {
799 		/* "find . -delete" skips rmdir(".") */
800 		rc = 0;
801 		if (NOT_LONE_CHAR(fileName, '.'))
802 			rc = rmdir(fileName);
803 	} else {
804 		rc = unlink(fileName);
805 	}
806 	if (rc < 0)
807 		bb_simple_perror_msg(fileName);
808 	return TRUE;
809 }
810 #endif
811 #if ENABLE_FEATURE_FIND_CONTEXT
ACTF(context)812 ACTF(context)
813 {
814 	security_context_t con;
815 	int rc;
816 
817 	if (G.recurse_flags & ACTION_FOLLOWLINKS) {
818 		rc = getfilecon(fileName, &con);
819 	} else {
820 		rc = lgetfilecon(fileName, &con);
821 	}
822 	if (rc < 0)
823 		return FALSE;
824 	rc = strcmp(ap->context, con);
825 	freecon(con);
826 	return rc == 0;
827 }
828 #endif
829 #if ENABLE_FEATURE_FIND_LINKS
ACTF(links)830 ACTF(links)
831 {
832 	switch(ap->links_char) {
833 	case '-' : return (statbuf->st_nlink <  ap->links_count);
834 	case '+' : return (statbuf->st_nlink >  ap->links_count);
835 	default:   return (statbuf->st_nlink == ap->links_count);
836 	}
837 }
838 #endif
839 
fileAction(const char * fileName,struct stat * statbuf,void * userData UNUSED_PARAM,int depth IF_NOT_FEATURE_FIND_MAXDEPTH (UNUSED_PARAM))840 static int FAST_FUNC fileAction(const char *fileName,
841 		struct stat *statbuf,
842 		void *userData UNUSED_PARAM,
843 		int depth IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM))
844 {
845 	int r;
846 	int same_fs = 1;
847 
848 #if ENABLE_FEATURE_FIND_XDEV
849 	if (S_ISDIR(statbuf->st_mode) && G.xdev_count) {
850 		int i;
851 		for (i = 0; i < G.xdev_count; i++) {
852 			if (G.xdev_dev[i] == statbuf->st_dev)
853 				goto found;
854 		}
855 		//bb_error_msg("'%s': not same fs", fileName);
856 		same_fs = 0;
857  found: ;
858 	}
859 #endif
860 
861 #if ENABLE_FEATURE_FIND_MAXDEPTH
862 	if (depth < G.minmaxdepth[0]) {
863 		if (same_fs)
864 			return TRUE; /* skip this, continue recursing */
865 		return SKIP; /* stop recursing */
866 	}
867 	if (depth > G.minmaxdepth[1])
868 		return SKIP; /* stop recursing */
869 #endif
870 
871 	r = exec_actions(G.actions, fileName, statbuf);
872 	/* Had no explicit -print[0] or -exec? then print */
873 	if ((r & TRUE) && G.need_print)
874 		puts(fileName);
875 
876 #if ENABLE_FEATURE_FIND_MAXDEPTH
877 	if (S_ISDIR(statbuf->st_mode)) {
878 		if (depth == G.minmaxdepth[1])
879 			return SKIP;
880 	}
881 #endif
882 	/* -xdev stops on mountpoints, but AFTER mountpoit itself
883 	 * is processed as usual */
884 	if (!same_fs) {
885 		return SKIP;
886 	}
887 
888 	/* Cannot return 0: our caller, recursive_action(),
889 	 * will perror() and skip dirs (if called on dir) */
890 	return (r & SKIP) ? SKIP : TRUE;
891 }
892 
893 
894 #if ENABLE_FEATURE_FIND_TYPE
find_type(const char * type)895 static int find_type(const char *type)
896 {
897 	int mask = 0;
898 
899 	if (*type == 'b')
900 		mask = S_IFBLK;
901 	else if (*type == 'c')
902 		mask = S_IFCHR;
903 	else if (*type == 'd')
904 		mask = S_IFDIR;
905 	else if (*type == 'p')
906 		mask = S_IFIFO;
907 	else if (*type == 'f')
908 		mask = S_IFREG;
909 	else if (*type == 'l')
910 		mask = S_IFLNK;
911 	else if (*type == 's')
912 		mask = S_IFSOCK;
913 
914 	if (mask == 0 || type[1] != '\0')
915 		bb_error_msg_and_die(bb_msg_invalid_arg_to, type, "-type");
916 
917 	return mask;
918 }
919 #endif
920 
921 #if ENABLE_FEATURE_FIND_PERM \
922  || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \
923  || ENABLE_FEATURE_FIND_SIZE  || ENABLE_FEATURE_FIND_LINKS
plus_minus_num(const char * str)924 static const char* plus_minus_num(const char* str)
925 {
926 	if (*str == '-' || *str == '+')
927 		str++;
928 	return str;
929 }
930 #endif
931 
932 /* Say no to GCCism */
933 #define USE_NESTED_FUNCTION 0
934 
935 #if !USE_NESTED_FUNCTION
936 struct pp_locals {
937 	action*** appp;
938 	unsigned cur_group;
939 	unsigned cur_action;
940 	IF_FEATURE_FIND_NOT( bool invert_flag; )
941 };
alloc_action(struct pp_locals * ppl,int sizeof_struct,action_fp f)942 static action* alloc_action(struct pp_locals *ppl, int sizeof_struct, action_fp f)
943 {
944 	action *ap = xzalloc(sizeof_struct);
945 	action **app;
946 	action ***group = &ppl->appp[ppl->cur_group];
947 	*group = app = xrealloc(*group, (ppl->cur_action+2) * sizeof(ppl->appp[0][0]));
948 	app[ppl->cur_action++] = ap;
949 	app[ppl->cur_action] = NULL;
950 	ap->f = f;
951 	IF_FEATURE_FIND_NOT( ap->invert = ppl->invert_flag; )
952 	IF_FEATURE_FIND_NOT( ppl->invert_flag = 0; )
953 	return ap;
954 }
955 #endif
956 
parse_params(char ** argv)957 static action*** parse_params(char **argv)
958 {
959 	enum {
960 	                        OPT_FOLLOW     ,
961 	IF_FEATURE_FIND_XDEV(   OPT_XDEV       ,)
962 	IF_FEATURE_FIND_DEPTH(  OPT_DEPTH      ,)
963 	                        PARM_a         ,
964 	                        PARM_o         ,
965 	IF_FEATURE_FIND_NOT(	PARM_char_not  ,)
966 #if ENABLE_DESKTOP
967 	                        PARM_and       ,
968 	                        PARM_or        ,
969 	IF_FEATURE_FIND_NOT(    PARM_not       ,)
970 #endif
971 	                        PARM_print     ,
972 	IF_FEATURE_FIND_PRINT0( PARM_print0    ,)
973 	IF_FEATURE_FIND_PRUNE(  PARM_prune     ,)
974 	IF_FEATURE_FIND_DELETE( PARM_delete    ,)
975 	IF_FEATURE_FIND_EXEC(   PARM_exec      ,)
976 	IF_FEATURE_FIND_PAREN(  PARM_char_brace,)
977 	/* All options/actions starting from here require argument */
978 	                        PARM_name      ,
979 	                        PARM_iname     ,
980 	IF_FEATURE_FIND_PATH(   PARM_path      ,)
981 #if ENABLE_DESKTOP
982 	/* -wholename is a synonym for -path */
983 	/* We support it because Linux kernel's "make tags" uses it */
984 	IF_FEATURE_FIND_PATH(   PARM_wholename ,)
985 #endif
986 	IF_FEATURE_FIND_PATH(   PARM_ipath     ,)
987 	IF_FEATURE_FIND_REGEX(  PARM_regex     ,)
988 	IF_FEATURE_FIND_TYPE(   PARM_type      ,)
989 	IF_FEATURE_FIND_PERM(   PARM_perm      ,)
990 	IF_FEATURE_FIND_MTIME(  PARM_mtime     ,)
991 	IF_FEATURE_FIND_MMIN(   PARM_mmin      ,)
992 	IF_FEATURE_FIND_NEWER(  PARM_newer     ,)
993 	IF_FEATURE_FIND_INUM(   PARM_inum      ,)
994 	IF_FEATURE_FIND_USER(   PARM_user      ,)
995 	IF_FEATURE_FIND_GROUP(  PARM_group     ,)
996 	IF_FEATURE_FIND_SIZE(   PARM_size      ,)
997 	IF_FEATURE_FIND_CONTEXT(PARM_context   ,)
998 	IF_FEATURE_FIND_LINKS(  PARM_links     ,)
999 	IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,OPT_MAXDEPTH,)
1000 	};
1001 
1002 	static const char params[] ALIGN1 =
1003 	                        "-follow\0"
1004 	IF_FEATURE_FIND_XDEV(   "-xdev\0"                 )
1005 	IF_FEATURE_FIND_DEPTH(  "-depth\0"                )
1006 	                        "-a\0"
1007 	                        "-o\0"
1008 	IF_FEATURE_FIND_NOT(    "!\0"       )
1009 #if ENABLE_DESKTOP
1010 	                        "-and\0"
1011 	                        "-or\0"
1012 	IF_FEATURE_FIND_NOT(	"-not\0"    )
1013 #endif
1014 	                        "-print\0"
1015 	IF_FEATURE_FIND_PRINT0( "-print0\0" )
1016 	IF_FEATURE_FIND_PRUNE(  "-prune\0"  )
1017 	IF_FEATURE_FIND_DELETE( "-delete\0" )
1018 	IF_FEATURE_FIND_EXEC(   "-exec\0"   )
1019 	IF_FEATURE_FIND_PAREN(  "(\0"       )
1020 	/* All options/actions starting from here require argument */
1021 	                        "-name\0"
1022 	                        "-iname\0"
1023 	IF_FEATURE_FIND_PATH(   "-path\0"   )
1024 #if ENABLE_DESKTOP
1025 	IF_FEATURE_FIND_PATH(   "-wholename\0")
1026 #endif
1027 	IF_FEATURE_FIND_PATH(   "-ipath\0"  )
1028 	IF_FEATURE_FIND_REGEX(  "-regex\0"  )
1029 	IF_FEATURE_FIND_TYPE(   "-type\0"   )
1030 	IF_FEATURE_FIND_PERM(   "-perm\0"   )
1031 	IF_FEATURE_FIND_MTIME(  "-mtime\0"  )
1032 	IF_FEATURE_FIND_MMIN(   "-mmin\0"   )
1033 	IF_FEATURE_FIND_NEWER(  "-newer\0"  )
1034 	IF_FEATURE_FIND_INUM(   "-inum\0"   )
1035 	IF_FEATURE_FIND_USER(   "-user\0"   )
1036 	IF_FEATURE_FIND_GROUP(  "-group\0"  )
1037 	IF_FEATURE_FIND_SIZE(   "-size\0"   )
1038 	IF_FEATURE_FIND_CONTEXT("-context\0")
1039 	IF_FEATURE_FIND_LINKS(  "-links\0"  )
1040 	IF_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0")
1041 	;
1042 
1043 #if !USE_NESTED_FUNCTION
1044 	struct pp_locals ppl;
1045 #define appp        (ppl.appp       )
1046 #define cur_group   (ppl.cur_group  )
1047 #define cur_action  (ppl.cur_action )
1048 #define invert_flag (ppl.invert_flag)
1049 #define ALLOC_ACTION(name) (action_##name*)alloc_action(&ppl, sizeof(action_##name), (action_fp) func_##name)
1050 #else
1051 	action*** appp;
1052 	unsigned cur_group;
1053 	unsigned cur_action;
1054 	IF_FEATURE_FIND_NOT( bool invert_flag; )
1055 
1056 	/* This is the only place in busybox where we use nested function.
1057 	 * So far more standard alternatives were bigger. */
1058 	/* Auto decl suppresses "func without a prototype" warning: */
1059 	auto action* alloc_action(int sizeof_struct, action_fp f);
1060 	action* alloc_action(int sizeof_struct, action_fp f)
1061 	{
1062 		action *ap;
1063 		appp[cur_group] = xrealloc(appp[cur_group], (cur_action+2) * sizeof(appp[0][0]));
1064 		appp[cur_group][cur_action++] = ap = xzalloc(sizeof_struct);
1065 		appp[cur_group][cur_action] = NULL;
1066 		ap->f = f;
1067 		IF_FEATURE_FIND_NOT( ap->invert = invert_flag; )
1068 		IF_FEATURE_FIND_NOT( invert_flag = 0; )
1069 		return ap;
1070 	}
1071 #define ALLOC_ACTION(name) (action_##name*)alloc_action(sizeof(action_##name), (action_fp) func_##name)
1072 #endif
1073 
1074 	cur_group = 0;
1075 	cur_action = 0;
1076 	IF_FEATURE_FIND_NOT( invert_flag = 0; )
1077 	appp = xzalloc(2 * sizeof(appp[0])); /* appp[0],[1] == NULL */
1078 
1079 	while (*argv) {
1080 		const char *arg = argv[0];
1081 		int parm = index_in_strings(params, arg);
1082 		const char *arg1 = argv[1];
1083 
1084 		dbg("arg:'%s' arg1:'%s' parm:%d PARM_type:%d", arg, arg1, parm, PARM_type);
1085 
1086 		if (parm >= PARM_name) {
1087 			/* All options/actions starting from -name require argument */
1088 			if (!arg1)
1089 				bb_error_msg_and_die(bb_msg_requires_arg, arg);
1090 			argv++;
1091 		}
1092 
1093 		/* We can use big switch() here, but on i386
1094 		 * it doesn't give smaller code. Other arches? */
1095 
1096 /* Options always return true. They always take effect
1097  * rather than being processed only when their place in the
1098  * expression is reached.
1099  */
1100 		/* Options */
1101 		if (parm == OPT_FOLLOW) {
1102 			dbg("follow enabled: %d", __LINE__);
1103 			G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK;
1104 		}
1105 #if ENABLE_FEATURE_FIND_XDEV
1106 		else if (parm == OPT_XDEV) {
1107 			dbg("%d", __LINE__);
1108 			G.xdev_on = 1;
1109 		}
1110 #endif
1111 #if ENABLE_FEATURE_FIND_MAXDEPTH
1112 		else if (parm == OPT_MINDEPTH || parm == OPT_MINDEPTH + 1) {
1113 			dbg("%d", __LINE__);
1114 			G.minmaxdepth[parm - OPT_MINDEPTH] = xatoi_positive(arg1);
1115 		}
1116 #endif
1117 #if ENABLE_FEATURE_FIND_DEPTH
1118 		else if (parm == OPT_DEPTH) {
1119 			dbg("%d", __LINE__);
1120 			G.recurse_flags |= ACTION_DEPTHFIRST;
1121 		}
1122 #endif
1123 /* Actions are grouped by operators
1124  * ( expr )              Force precedence
1125  * ! expr                True if expr is false
1126  * -not expr             Same as ! expr
1127  * expr1 [-a[nd]] expr2  And; expr2 is not evaluated if expr1 is false
1128  * expr1 -o[r] expr2     Or; expr2 is not evaluated if expr1 is true
1129  * expr1 , expr2         List; both expr1 and expr2 are always evaluated
1130  * We implement: (), -a, -o
1131  */
1132 		/* Operators */
1133 		else if (parm == PARM_a IF_DESKTOP(|| parm == PARM_and)) {
1134 			dbg("%d", __LINE__);
1135 			/* no further special handling required */
1136 		}
1137 		else if (parm == PARM_o IF_DESKTOP(|| parm == PARM_or)) {
1138 			dbg("%d", __LINE__);
1139 			/* start new OR group */
1140 			cur_group++;
1141 			appp = xrealloc(appp, (cur_group+2) * sizeof(appp[0]));
1142 			/*appp[cur_group] = NULL; - already NULL */
1143 			appp[cur_group+1] = NULL;
1144 			cur_action = 0;
1145 		}
1146 #if ENABLE_FEATURE_FIND_NOT
1147 		else if (parm == PARM_char_not IF_DESKTOP(|| parm == PARM_not)) {
1148 			/* also handles "find ! ! -name 'foo*'" */
1149 			invert_flag ^= 1;
1150 			dbg("invert_flag:%d", invert_flag);
1151 		}
1152 #endif
1153 		/* Actions */
1154 		else if (parm == PARM_print) {
1155 			dbg("%d", __LINE__);
1156 			G.need_print = 0;
1157 			(void) ALLOC_ACTION(print);
1158 		}
1159 #if ENABLE_FEATURE_FIND_PRINT0
1160 		else if (parm == PARM_print0) {
1161 			dbg("%d", __LINE__);
1162 			G.need_print = 0;
1163 			(void) ALLOC_ACTION(print0);
1164 		}
1165 #endif
1166 #if ENABLE_FEATURE_FIND_PRUNE
1167 		else if (parm == PARM_prune) {
1168 			dbg("%d", __LINE__);
1169 			(void) ALLOC_ACTION(prune);
1170 		}
1171 #endif
1172 #if ENABLE_FEATURE_FIND_DELETE
1173 		else if (parm == PARM_delete) {
1174 			dbg("%d", __LINE__);
1175 			G.need_print = 0;
1176 			G.recurse_flags |= ACTION_DEPTHFIRST;
1177 			(void) ALLOC_ACTION(delete);
1178 		}
1179 #endif
1180 #if ENABLE_FEATURE_FIND_EXEC
1181 		else if (parm == PARM_exec) {
1182 			int i;
1183 			action_exec *ap;
1184 			IF_FEATURE_FIND_EXEC_PLUS(int all_subst = 0;)
1185 			dbg("%d", __LINE__);
1186 			G.need_print = 0;
1187 			ap = ALLOC_ACTION(exec);
1188 			ap->exec_argv = ++argv; /* first arg after -exec */
1189 			/*ap->exec_argc = 0; - ALLOC_ACTION did it */
1190 			while (1) {
1191 				if (!*argv) /* did not see ';' or '+' until end */
1192 					bb_error_msg_and_die(bb_msg_requires_arg, "-exec");
1193 				// find -exec echo Foo ">{}<" ";"
1194 				// executes "echo Foo >FILENAME<",
1195 				// find -exec echo Foo ">{}<" "+"
1196 				// executes "echo Foo FILENAME1 FILENAME2 FILENAME3...".
1197 				if ((argv[0][0] == ';' || argv[0][0] == '+')
1198 				 && argv[0][1] == '\0'
1199 				) {
1200 # if ENABLE_FEATURE_FIND_EXEC_PLUS
1201 					if (argv[0][0] == '+')
1202 						ap->filelist = xzalloc(sizeof(ap->filelist[0]));
1203 # endif
1204 					break;
1205 				}
1206 				argv++;
1207 				ap->exec_argc++;
1208 			}
1209 			if (ap->exec_argc == 0)
1210 				bb_error_msg_and_die(bb_msg_requires_arg, arg);
1211 			ap->subst_count = xmalloc(ap->exec_argc * sizeof(int));
1212 			i = ap->exec_argc;
1213 			while (i--) {
1214 				ap->subst_count[i] = count_strstr(ap->exec_argv[i], "{}");
1215 				IF_FEATURE_FIND_EXEC_PLUS(all_subst += ap->subst_count[i];)
1216 			}
1217 # if ENABLE_FEATURE_FIND_EXEC_PLUS
1218 			/*
1219 			 * coreutils expects {} to appear only once in "-exec +"
1220 			 */
1221 			if (all_subst != 1 && ap->filelist)
1222 				bb_error_msg_and_die("only one '{}' allowed for -exec +");
1223 # endif
1224 		}
1225 #endif
1226 #if ENABLE_FEATURE_FIND_PAREN
1227 		else if (parm == PARM_char_brace) {
1228 			action_paren *ap;
1229 			char **endarg;
1230 			unsigned nested = 1;
1231 
1232 			dbg("%d", __LINE__);
1233 			endarg = argv;
1234 			while (1) {
1235 				if (!*++endarg)
1236 					bb_error_msg_and_die("unpaired '('");
1237 				if (LONE_CHAR(*endarg, '('))
1238 					nested++;
1239 				else if (LONE_CHAR(*endarg, ')') && !--nested) {
1240 					*endarg = NULL;
1241 					break;
1242 				}
1243 			}
1244 			ap = ALLOC_ACTION(paren);
1245 			ap->subexpr = parse_params(argv + 1);
1246 			*endarg = (char*) ")"; /* restore NULLed parameter */
1247 			argv = endarg;
1248 		}
1249 #endif
1250 		else if (parm == PARM_name || parm == PARM_iname) {
1251 			action_name *ap;
1252 			dbg("%d", __LINE__);
1253 			ap = ALLOC_ACTION(name);
1254 			ap->pattern = arg1;
1255 			ap->iname = (parm == PARM_iname);
1256 		}
1257 #if ENABLE_FEATURE_FIND_PATH
1258 		else if (parm == PARM_path IF_DESKTOP(|| parm == PARM_wholename) || parm == PARM_ipath) {
1259 			action_path *ap;
1260 			dbg("%d", __LINE__);
1261 			ap = ALLOC_ACTION(path);
1262 			ap->pattern = arg1;
1263 			ap->ipath = (parm == PARM_ipath);
1264 		}
1265 #endif
1266 #if ENABLE_FEATURE_FIND_REGEX
1267 		else if (parm == PARM_regex) {
1268 			action_regex *ap;
1269 			dbg("%d", __LINE__);
1270 			ap = ALLOC_ACTION(regex);
1271 			xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/);
1272 		}
1273 #endif
1274 #if ENABLE_FEATURE_FIND_TYPE
1275 		else if (parm == PARM_type) {
1276 			action_type *ap;
1277 			ap = ALLOC_ACTION(type);
1278 			ap->type_mask = find_type(arg1);
1279 			dbg("created:type mask:%x", ap->type_mask);
1280 		}
1281 #endif
1282 #if ENABLE_FEATURE_FIND_PERM
1283 /* -perm BITS   File's mode bits are exactly BITS (octal or symbolic).
1284  *              Symbolic modes use mode 0 as a point of departure.
1285  * -perm -BITS  All of the BITS are set in file's mode.
1286  * -perm [+/]BITS  At least one of the BITS is set in file's mode.
1287  */
1288 		else if (parm == PARM_perm) {
1289 			action_perm *ap;
1290 			dbg("%d", __LINE__);
1291 			ap = ALLOC_ACTION(perm);
1292 			ap->perm_char = arg1[0];
1293 			arg1 = (arg1[0] == '/' ? arg1+1 : plus_minus_num(arg1));
1294 			/*ap->perm_mask = 0; - ALLOC_ACTION did it */
1295 			ap->perm_mask = bb_parse_mode(arg1, ap->perm_mask);
1296 			if (ap->perm_mask == (mode_t)-1)
1297 				bb_error_msg_and_die("invalid mode '%s'", arg1);
1298 		}
1299 #endif
1300 #if ENABLE_FEATURE_FIND_MTIME
1301 		else if (parm == PARM_mtime) {
1302 			action_mtime *ap;
1303 			dbg("%d", __LINE__);
1304 			ap = ALLOC_ACTION(mtime);
1305 			ap->mtime_char = arg1[0];
1306 			ap->mtime_days = xatoul(plus_minus_num(arg1));
1307 		}
1308 #endif
1309 #if ENABLE_FEATURE_FIND_MMIN
1310 		else if (parm == PARM_mmin) {
1311 			action_mmin *ap;
1312 			dbg("%d", __LINE__);
1313 			ap = ALLOC_ACTION(mmin);
1314 			ap->mmin_char = arg1[0];
1315 			ap->mmin_mins = xatoul(plus_minus_num(arg1));
1316 		}
1317 #endif
1318 #if ENABLE_FEATURE_FIND_NEWER
1319 		else if (parm == PARM_newer) {
1320 			struct stat stat_newer;
1321 			action_newer *ap;
1322 			dbg("%d", __LINE__);
1323 			ap = ALLOC_ACTION(newer);
1324 			xstat(arg1, &stat_newer);
1325 			ap->newer_mtime = stat_newer.st_mtime;
1326 		}
1327 #endif
1328 #if ENABLE_FEATURE_FIND_INUM
1329 		else if (parm == PARM_inum) {
1330 			action_inum *ap;
1331 			dbg("%d", __LINE__);
1332 			ap = ALLOC_ACTION(inum);
1333 			ap->inode_num = xatoul(arg1);
1334 		}
1335 #endif
1336 #if ENABLE_FEATURE_FIND_USER
1337 		else if (parm == PARM_user) {
1338 			action_user *ap;
1339 			dbg("%d", __LINE__);
1340 			ap = ALLOC_ACTION(user);
1341 			ap->uid = bb_strtou(arg1, NULL, 10);
1342 			if (errno)
1343 				ap->uid = xuname2uid(arg1);
1344 		}
1345 #endif
1346 #if ENABLE_FEATURE_FIND_GROUP
1347 		else if (parm == PARM_group) {
1348 			action_group *ap;
1349 			dbg("%d", __LINE__);
1350 			ap = ALLOC_ACTION(group);
1351 			ap->gid = bb_strtou(arg1, NULL, 10);
1352 			if (errno)
1353 				ap->gid = xgroup2gid(arg1);
1354 		}
1355 #endif
1356 #if ENABLE_FEATURE_FIND_SIZE
1357 		else if (parm == PARM_size) {
1358 /* -size n[bckw]: file uses n units of space
1359  * b (default): units are 512-byte blocks
1360  * c: 1 byte
1361  * k: kilobytes
1362  * w: 2-byte words
1363  */
1364 #if ENABLE_LFS
1365 #define XATOU_SFX xatoull_sfx
1366 #else
1367 #define XATOU_SFX xatoul_sfx
1368 #endif
1369 			static const struct suffix_mult find_suffixes[] = {
1370 				{ "c", 1 },
1371 				{ "w", 2 },
1372 				{ "", 512 },
1373 				{ "b", 512 },
1374 				{ "k", 1024 },
1375 				{ "", 0 }
1376 			};
1377 			action_size *ap;
1378 			dbg("%d", __LINE__);
1379 			ap = ALLOC_ACTION(size);
1380 			ap->size_char = arg1[0];
1381 			ap->size = XATOU_SFX(plus_minus_num(arg1), find_suffixes);
1382 		}
1383 #endif
1384 #if ENABLE_FEATURE_FIND_CONTEXT
1385 		else if (parm == PARM_context) {
1386 			action_context *ap;
1387 			dbg("%d", __LINE__);
1388 			ap = ALLOC_ACTION(context);
1389 			/*ap->context = NULL; - ALLOC_ACTION did it */
1390 			/* SELinux headers erroneously declare non-const parameter */
1391 			if (selinux_raw_to_trans_context((char*)arg1, &ap->context))
1392 				bb_simple_perror_msg(arg1);
1393 		}
1394 #endif
1395 #if ENABLE_FEATURE_FIND_LINKS
1396 		else if (parm == PARM_links) {
1397 			action_links *ap;
1398 			dbg("%d", __LINE__);
1399 			ap = ALLOC_ACTION(links);
1400 			ap->links_char = arg1[0];
1401 			ap->links_count = xatoul(plus_minus_num(arg1));
1402 		}
1403 #endif
1404 		else {
1405 			bb_error_msg("unrecognized: %s", arg);
1406 			bb_show_usage();
1407 		}
1408 		argv++;
1409 	}
1410 	dbg("exiting %s", __func__);
1411 	return appp;
1412 #undef ALLOC_ACTION
1413 #undef appp
1414 #undef cur_action
1415 #undef invert_flag
1416 }
1417 
1418 int find_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
find_main(int argc UNUSED_PARAM,char ** argv)1419 int find_main(int argc UNUSED_PARAM, char **argv)
1420 {
1421 	int i, firstopt, status = EXIT_SUCCESS;
1422 	char **past_HLP, *saved;
1423 
1424 	INIT_G();
1425 
1426 	/* "find -type f" + getopt("+HLP") => disaster.
1427 	 * Need to avoid getopt running into a non-HLP option.
1428 	 * Do this by temporarily storing NULL there:
1429 	 */
1430 	past_HLP = argv;
1431 	for (;;) {
1432 		saved = *++past_HLP;
1433 		if (!saved)
1434 			break;
1435 		if (saved[0] != '-')
1436 			break;
1437 		if (!saved[1])
1438 			break; /* it is "-" */
1439 		if ((saved+1)[strspn(saved+1, "HLP")] != '\0')
1440 			break;
1441 	}
1442 	*past_HLP = NULL;
1443 	/* "+": stop on first non-option */
1444 	i = getopt32(argv, "+HLP");
1445 	if (i & (1<<0))
1446 		G.recurse_flags |= ACTION_FOLLOWLINKS_L0 | ACTION_DANGLING_OK;
1447 	if (i & (1<<1))
1448 		G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK;
1449 	/* -P is default and is ignored */
1450 	argv = past_HLP; /* same result as "argv += optind;" */
1451 	*past_HLP = saved;
1452 
1453 	for (firstopt = 0; argv[firstopt]; firstopt++) {
1454 		if (argv[firstopt][0] == '-')
1455 			break;
1456 		if (ENABLE_FEATURE_FIND_NOT && LONE_CHAR(argv[firstopt], '!'))
1457 			break;
1458 		if (ENABLE_FEATURE_FIND_PAREN && LONE_CHAR(argv[firstopt], '('))
1459 			break;
1460 	}
1461 	if (firstopt == 0) {
1462 		*--argv = (char*)".";
1463 		firstopt++;
1464 	}
1465 
1466 	G.actions = parse_params(&argv[firstopt]);
1467 	argv[firstopt] = NULL;
1468 
1469 #if ENABLE_FEATURE_FIND_XDEV
1470 	if (G.xdev_on) {
1471 		struct stat stbuf;
1472 
1473 		G.xdev_count = firstopt;
1474 		G.xdev_dev = xzalloc(G.xdev_count * sizeof(G.xdev_dev[0]));
1475 		for (i = 0; argv[i]; i++) {
1476 			/* not xstat(): shouldn't bomb out on
1477 			 * "find not_exist exist -xdev" */
1478 			if (stat(argv[i], &stbuf) == 0)
1479 				G.xdev_dev[i] = stbuf.st_dev;
1480 			/* else G.xdev_dev[i] stays 0 and
1481 			 * won't match any real device dev_t
1482 			 */
1483 		}
1484 	}
1485 #endif
1486 
1487 	for (i = 0; argv[i]; i++) {
1488 		if (!recursive_action(argv[i],
1489 				G.recurse_flags,/* flags */
1490 				fileAction,     /* file action */
1491 				fileAction,     /* dir action */
1492 				NULL,           /* user data */
1493 				0)              /* depth */
1494 		) {
1495 			status |= EXIT_FAILURE;
1496 		}
1497 	}
1498 
1499 	IF_FEATURE_FIND_EXEC_PLUS(status |= flush_exec_plus();)
1500 	return status;
1501 }
1502