mdev.txt: explain the meaning of a leading "-"
[oweals/busybox.git] / findutils / find.c
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 /* findutils-4.1.20:
13  *
14  * # find file.txt -exec 'echo {}' '{}  {}' ';'
15  * find: echo file.txt: No such file or directory
16  * # find file.txt -exec 'echo' '{}  {}' '; '
17  * find: missing argument to '-exec'
18  * # find file.txt -exec 'echo {}' '{}  {}' ';' junk
19  * find: paths must precede expression
20  * # find file.txt -exec 'echo {}' '{}  {}' ';' junk ';'
21  * find: paths must precede expression
22  * # find file.txt -exec 'echo' '{}  {}' ';'
23  * file.txt  file.txt
24  * (strace: execve("/bin/echo", ["echo", "file.txt  file.txt"], [ 30 vars ]))
25  * # find file.txt -exec 'echo' '{}  {}' ';' -print -exec pwd ';'
26  * file.txt  file.txt
27  * file.txt
28  * /tmp
29  * # find -name '*.c' -o -name '*.h'
30  * [shows files, *.c and *.h intermixed]
31  * # find file.txt -name '*f*' -o -name '*t*'
32  * file.txt
33  * # find file.txt -name '*z*' -o -name '*t*'
34  * file.txt
35  * # find file.txt -name '*f*' -o -name '*z*'
36  * file.txt
37  *
38  * # find t z -name '*t*' -print -o -name '*z*'
39  * t
40  * # find t z t z -name '*t*' -o -name '*z*' -print
41  * z
42  * z
43  * # find t z t z '(' -name '*t*' -o -name '*z*' ')' -o -print
44  * (no output)
45  */
46 /* Testing script
47  * ./busybox find "$@" | tee /tmp/bb_find
48  * echo ==================
49  * /path/to/gnu/find "$@" | tee /tmp/std_find
50  * echo ==================
51  * diff -u /tmp/std_find /tmp/bb_find && echo Identical
52  */
53 //config:config FIND
54 //config:       bool "find (14 kb)"
55 //config:       default y
56 //config:       help
57 //config:       find is used to search your system to find specified files.
58 //config:
59 //config:config FEATURE_FIND_PRINT0
60 //config:       bool "Enable -print0: NUL-terminated output"
61 //config:       default y
62 //config:       depends on FIND
63 //config:       help
64 //config:       Causes output names to be separated by a NUL character
65 //config:       rather than a newline. This allows names that contain
66 //config:       newlines and other whitespace to be more easily
67 //config:       interpreted by other programs.
68 //config:
69 //config:config FEATURE_FIND_MTIME
70 //config:       bool "Enable -mtime: modified time matching"
71 //config:       default y
72 //config:       depends on FIND
73 //config:       help
74 //config:       Allow searching based on the modification time of
75 //config:       files, in days.
76 //config:
77 //config:config FEATURE_FIND_MMIN
78 //config:       bool "Enable -mmin: modified time matching by minutes"
79 //config:       default y
80 //config:       depends on FIND
81 //config:       help
82 //config:       Allow searching based on the modification time of
83 //config:       files, in minutes.
84 //config:
85 //config:config FEATURE_FIND_PERM
86 //config:       bool "Enable -perm: permissions matching"
87 //config:       default y
88 //config:       depends on FIND
89 //config:
90 //config:config FEATURE_FIND_TYPE
91 //config:       bool "Enable -type: file type matching (file/dir/link/...)"
92 //config:       default y
93 //config:       depends on FIND
94 //config:       help
95 //config:       Enable searching based on file type (file,
96 //config:       directory, socket, device, etc.).
97 //config:
98 //config:config FEATURE_FIND_EXECUTABLE
99 //config:       bool "Enable -executable: file is executable"
100 //config:       default y
101 //config:       depends on FIND
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:
108 //config:config FEATURE_FIND_MAXDEPTH
109 //config:       bool "Enable -mindepth N and -maxdepth N"
110 //config:       default y
111 //config:       depends on FIND
112 //config:
113 //config:config FEATURE_FIND_NEWER
114 //config:       bool "Enable -newer: compare file modification times"
115 //config:       default y
116 //config:       depends on FIND
117 //config:       help
118 //config:       Support the 'find -newer' option for finding any files which have
119 //config:       modification time that is more recent than the specified FILE.
120 //config:
121 //config:config FEATURE_FIND_INUM
122 //config:       bool "Enable -inum: inode number matching"
123 //config:       default y
124 //config:       depends on FIND
125 //config:
126 //config:config FEATURE_FIND_EXEC
127 //config:       bool "Enable -exec: execute commands"
128 //config:       default y
129 //config:       depends on FIND
130 //config:       help
131 //config:       Support the 'find -exec' option for executing commands based upon
132 //config:       the files matched.
133 //config:
134 //config:config FEATURE_FIND_EXEC_PLUS
135 //config:       bool "Enable -exec ... {} +"
136 //config:       default y
137 //config:       depends on FEATURE_FIND_EXEC
138 //config:       help
139 //config:       Support the 'find -exec ... {} +' option for executing commands
140 //config:       for all matched files at once.
141 //config:       Without this option, -exec + is a synonym for -exec ;
142 //config:       (IOW: it works correctly, but without expected speedup)
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:
149 //config:config FEATURE_FIND_GROUP
150 //config:       bool "Enable -group: group/gid matching"
151 //config:       default y
152 //config:       depends on FIND
153 //config:
154 //config:config FEATURE_FIND_NOT
155 //config:       bool "Enable the 'not' (!) operator"
156 //config:       default y
157 //config:       depends on FIND
158 //config:       help
159 //config:       Support the '!' operator to invert the test results.
160 //config:       If 'Enable full-blown desktop' is enabled, then will also support
161 //config:       the non-POSIX notation '-not'.
162 //config:
163 //config:config FEATURE_FIND_DEPTH
164 //config:       bool "Enable -depth"
165 //config:       default y
166 //config:       depends on FIND
167 //config:       help
168 //config:       Process each directory's contents before the directory itself.
169 //config:
170 //config:config FEATURE_FIND_PAREN
171 //config:       bool "Enable parens in options"
172 //config:       default y
173 //config:       depends on FIND
174 //config:       help
175 //config:       Enable usage of parens '(' to specify logical order of arguments.
176 //config:
177 //config:config FEATURE_FIND_SIZE
178 //config:       bool "Enable -size: file size matching"
179 //config:       default y
180 //config:       depends on FIND
181 //config:
182 //config:config FEATURE_FIND_PRUNE
183 //config:       bool "Enable -prune: exclude subdirectories"
184 //config:       default y
185 //config:       depends on FIND
186 //config:       help
187 //config:       If the file is a directory, don't descend into it. Useful for
188 //config:       exclusion .svn and CVS directories.
189 //config:
190 //config:config FEATURE_FIND_QUIT
191 //config:       bool "Enable -quit: exit"
192 //config:       default y
193 //config:       depends on FIND
194 //config:       help
195 //config:       If this action is reached, 'find' exits.
196 //config:
197 //config:config FEATURE_FIND_DELETE
198 //config:       bool "Enable -delete: delete files/dirs"
199 //config:       default y
200 //config:       depends on FIND && FEATURE_FIND_DEPTH
201 //config:       help
202 //config:       Support the 'find -delete' option for deleting files and directories.
203 //config:       WARNING: This option can do much harm if used wrong. Busybox will not
204 //config:       try to protect the user from doing stupid things. Use with care.
205 //config:
206 //config:config FEATURE_FIND_PATH
207 //config:       bool "Enable -path: match pathname with shell pattern"
208 //config:       default y
209 //config:       depends on FIND
210 //config:       help
211 //config:       The -path option matches whole pathname instead of just filename.
212 //config:
213 //config:config FEATURE_FIND_REGEX
214 //config:       bool "Enable -regex: match pathname with regex"
215 //config:       default y
216 //config:       depends on FIND
217 //config:       help
218 //config:       The -regex option matches whole pathname against regular expression.
219 //config:
220 //config:config FEATURE_FIND_CONTEXT
221 //config:       bool "Enable -context: security context matching"
222 //config:       default n
223 //config:       depends on FIND && SELINUX
224 //config:       help
225 //config:       Support the 'find -context' option for matching security context.
226 //config:
227 //config:config FEATURE_FIND_LINKS
228 //config:       bool "Enable -links: link count matching"
229 //config:       default y
230 //config:       depends on FIND
231 //config:       help
232 //config:       Support the 'find -links' option for matching number of links.
233
234 //applet:IF_FIND(APPLET_NOEXEC(find, find, BB_DIR_USR_BIN, BB_SUID_DROP, find))
235
236 //kbuild:lib-$(CONFIG_FIND) += find.o
237
238 //usage:#define find_trivial_usage
239 //usage:       "[-HL] [PATH]... [OPTIONS] [ACTIONS]"
240 //usage:#define find_full_usage "\n\n"
241 //usage:       "Search for files and perform actions on them.\n"
242 //usage:       "First failed action stops processing of current file.\n"
243 //usage:       "Defaults: PATH is current directory, action is '-print'\n"
244 //usage:     "\n        -L,-follow      Follow symlinks"
245 //usage:     "\n        -H              ...on command line only"
246 //usage:        IF_FEATURE_FIND_XDEV(
247 //usage:     "\n        -xdev           Don't descend directories on other filesystems"
248 //usage:        )
249 //usage:        IF_FEATURE_FIND_MAXDEPTH(
250 //usage:     "\n        -maxdepth N     Descend at most N levels. -maxdepth 0 applies"
251 //usage:     "\n                        actions to command line arguments only"
252 //usage:     "\n        -mindepth N     Don't act on first N levels"
253 //usage:        )
254 //usage:        IF_FEATURE_FIND_DEPTH(
255 //usage:     "\n        -depth          Act on directory *after* traversing it"
256 //usage:        )
257 //usage:     "\n"
258 //usage:     "\nActions:"
259 //usage:        IF_FEATURE_FIND_PAREN(
260 //usage:     "\n        ( ACTIONS )     Group actions for -o / -a"
261 //usage:        )
262 //usage:        IF_FEATURE_FIND_NOT(
263 //usage:     "\n        ! ACT           Invert ACT's success/failure"
264 //usage:        )
265 //usage:     "\n        ACT1 [-a] ACT2  If ACT1 fails, stop, else do ACT2"
266 //usage:     "\n        ACT1 -o ACT2    If ACT1 succeeds, stop, else do ACT2"
267 //usage:     "\n                        Note: -a has higher priority than -o"
268 //usage:     "\n        -name PATTERN   Match file name (w/o directory name) to PATTERN"
269 //usage:     "\n        -iname PATTERN  Case insensitive -name"
270 //usage:        IF_FEATURE_FIND_PATH(
271 //usage:     "\n        -path PATTERN   Match path to PATTERN"
272 //usage:     "\n        -ipath PATTERN  Case insensitive -path"
273 //usage:        )
274 //usage:        IF_FEATURE_FIND_REGEX(
275 //usage:     "\n        -regex PATTERN  Match path to regex PATTERN"
276 //usage:        )
277 //usage:        IF_FEATURE_FIND_TYPE(
278 //usage:     "\n        -type X         File type is X (one of: f,d,l,b,c,s,p)"
279 //usage:        )
280 //usage:        IF_FEATURE_FIND_EXECUTABLE(
281 //usage:     "\n        -executable     File is executable"
282 //usage:        )
283 //usage:        IF_FEATURE_FIND_PERM(
284 //usage:     "\n        -perm MASK      At least one mask bit (+MASK), all bits (-MASK),"
285 //usage:     "\n                        or exactly MASK bits are set in file's mode"
286 //usage:        )
287 //usage:        IF_FEATURE_FIND_MTIME(
288 //usage:     "\n        -mtime DAYS     mtime is greater than (+N), less than (-N),"
289 //usage:     "\n                        or exactly N days in the past"
290 //usage:        )
291 //usage:        IF_FEATURE_FIND_MMIN(
292 //usage:     "\n        -mmin MINS      mtime is greater than (+N), less than (-N),"
293 //usage:     "\n                        or exactly N minutes in the past"
294 //usage:        )
295 //usage:        IF_FEATURE_FIND_NEWER(
296 //usage:     "\n        -newer FILE     mtime is more recent than FILE's"
297 //usage:        )
298 //usage:        IF_FEATURE_FIND_INUM(
299 //usage:     "\n        -inum N         File has inode number N"
300 //usage:        )
301 //usage:        IF_FEATURE_FIND_USER(
302 //usage:     "\n        -user NAME/ID   File is owned by given user"
303 //usage:        )
304 //usage:        IF_FEATURE_FIND_GROUP(
305 //usage:     "\n        -group NAME/ID  File is owned by given group"
306 //usage:        )
307 //usage:        IF_FEATURE_FIND_SIZE(
308 //usage:     "\n        -size N[bck]    File size is N (c:bytes,k:kbytes,b:512 bytes(def.))"
309 //usage:     "\n                        +/-N: file size is bigger/smaller than N"
310 //usage:        )
311 //usage:        IF_FEATURE_FIND_LINKS(
312 //usage:     "\n        -links N        Number of links is greater than (+N), less than (-N),"
313 //usage:     "\n                        or exactly N"
314 //usage:        )
315 //usage:        IF_FEATURE_FIND_CONTEXT(
316 //usage:     "\n        -context CTX    File has specified security context"
317 //usage:        )
318 //usage:        IF_FEATURE_FIND_PRUNE(
319 //usage:     "\n        -prune          If current file is directory, don't descend into it"
320 //usage:        )
321 //usage:     "\nIf none of the following actions is specified, -print is assumed"
322 //usage:     "\n        -print          Print file name"
323 //usage:        IF_FEATURE_FIND_PRINT0(
324 //usage:     "\n        -print0         Print file name, NUL terminated"
325 //usage:        )
326 //usage:        IF_FEATURE_FIND_EXEC(
327 //usage:     "\n        -exec CMD ARG ; Run CMD with all instances of {} replaced by"
328 //usage:     "\n                        file name. Fails if CMD exits with nonzero"
329 //usage:        )
330 //usage:        IF_FEATURE_FIND_EXEC_PLUS(
331 //usage:     "\n        -exec CMD ARG + Run CMD with {} replaced by list of file names"
332 //usage:        )
333 //usage:        IF_FEATURE_FIND_DELETE(
334 //usage:     "\n        -delete         Delete current file/directory. Turns on -depth option"
335 //usage:        )
336 //usage:        IF_FEATURE_FIND_QUIT(
337 //usage:     "\n        -quit           Exit"
338 //usage:        )
339 //usage:
340 //usage:#define find_example_usage
341 //usage:       "$ find / -name passwd\n"
342 //usage:       "/etc/passwd\n"
343
344 #include <fnmatch.h>
345 #include "libbb.h"
346 #include "common_bufsiz.h"
347 #if ENABLE_FEATURE_FIND_REGEX
348 # include "xregex.h"
349 #endif
350 /* GNUism: */
351 #ifndef FNM_CASEFOLD
352 # define FNM_CASEFOLD 0
353 #endif
354
355 #if 1
356 # define dbg(...) ((void)0)
357 #else
358 # define dbg(...) bb_error_msg(__VA_ARGS__)
359 #endif
360
361
362 /* This is a NOEXEC applet. Be very careful! */
363
364
365 typedef int (*action_fp)(const char *fileName, const struct stat *statbuf, void *) FAST_FUNC;
366
367 typedef struct {
368         action_fp f;
369 #if ENABLE_FEATURE_FIND_NOT
370         bool invert;
371 #endif
372 } action;
373
374 #define ACTS(name, ...) typedef struct { action a; __VA_ARGS__ } action_##name;
375 #define ACTF(name) \
376         static int FAST_FUNC func_##name(const char *fileName UNUSED_PARAM, \
377                 const struct stat *statbuf UNUSED_PARAM, \
378                 action_##name* ap UNUSED_PARAM)
379
380                         ACTS(print)
381                         ACTS(name,  const char *pattern; bool iname;)
382 IF_FEATURE_FIND_PATH(   ACTS(path,  const char *pattern; bool ipath;))
383 IF_FEATURE_FIND_REGEX(  ACTS(regex, regex_t compiled_pattern;))
384 IF_FEATURE_FIND_PRINT0( ACTS(print0))
385 IF_FEATURE_FIND_TYPE(   ACTS(type,  int type_mask;))
386 IF_FEATURE_FIND_EXECUTABLE(ACTS(executable))
387 IF_FEATURE_FIND_PERM(   ACTS(perm,  char perm_char; mode_t perm_mask;))
388 IF_FEATURE_FIND_MTIME(  ACTS(mtime, char mtime_char; unsigned mtime_days;))
389 IF_FEATURE_FIND_MMIN(   ACTS(mmin,  char mmin_char; unsigned mmin_mins;))
390 IF_FEATURE_FIND_NEWER(  ACTS(newer, time_t newer_mtime;))
391 IF_FEATURE_FIND_INUM(   ACTS(inum,  ino_t inode_num;))
392 IF_FEATURE_FIND_USER(   ACTS(user,  uid_t uid;))
393 IF_FEATURE_FIND_SIZE(   ACTS(size,  char size_char; off_t size;))
394 IF_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;))
395 IF_FEATURE_FIND_PAREN(  ACTS(paren, action ***subexpr;))
396 IF_FEATURE_FIND_PRUNE(  ACTS(prune))
397 IF_FEATURE_FIND_QUIT(   ACTS(quit))
398 IF_FEATURE_FIND_DELETE( ACTS(delete))
399 IF_FEATURE_FIND_EXEC(   ACTS(exec,
400                                 char **exec_argv; /* -exec ARGS */
401                                 unsigned *subst_count;
402                                 int exec_argc; /* count of ARGS */
403                                 IF_FEATURE_FIND_EXEC_PLUS(
404                                         /*
405                                          * filelist is NULL if "exec ;"
406                                          * non-NULL if "exec +"
407                                          */
408                                         char **filelist;
409                                         int filelist_idx;
410                                         int file_len;
411                                 )
412                                 ))
413 IF_FEATURE_FIND_GROUP(  ACTS(group, gid_t gid;))
414 IF_FEATURE_FIND_LINKS(  ACTS(links, char links_char; int links_count;))
415
416 struct globals {
417         IF_FEATURE_FIND_XDEV(dev_t *xdev_dev;)
418         IF_FEATURE_FIND_XDEV(int xdev_count;)
419 #if ENABLE_FEATURE_FIND_MAXDEPTH
420         int minmaxdepth[2];
421 #endif
422         action ***actions;
423         smallint need_print;
424         smallint xdev_on;
425         smalluint exitstatus;
426         recurse_flags_t recurse_flags;
427         IF_FEATURE_FIND_EXEC_PLUS(unsigned max_argv_len;)
428 } FIX_ALIASING;
429 #define G (*(struct globals*)bb_common_bufsiz1)
430 #define INIT_G() do { \
431         setup_common_bufsiz(); \
432         BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
433         /* we have to zero it out because of NOEXEC */ \
434         memset(&G, 0, sizeof(G)); \
435         IF_FEATURE_FIND_MAXDEPTH(G.minmaxdepth[1] = INT_MAX;) \
436         IF_FEATURE_FIND_EXEC_PLUS(G.max_argv_len = bb_arg_max() - 2048;) \
437         G.need_print = 1; \
438         G.recurse_flags = ACTION_RECURSE; \
439 } while (0)
440
441 /* Return values of ACTFs ('action functions') are a bit mask:
442  * bit 1=1: prune (use SKIP constant for setting it)
443  * bit 0=1: matched successfully (TRUE)
444  */
445
446 static int exec_actions(action ***appp, const char *fileName, const struct stat *statbuf)
447 {
448         int cur_group;
449         int cur_action;
450         int rc = 0;
451         action **app, *ap;
452
453         /* "action group" is a set of actions ANDed together.
454          * groups are ORed together.
455          * We simply evaluate each group until we find one in which all actions
456          * succeed. */
457
458         /* -prune is special: if it is encountered, then we won't
459          * descend into current directory. It doesn't matter whether
460          * action group (in which -prune sits) will succeed or not:
461          * find * -prune -name 'f*' -o -name 'm*' -- prunes every dir
462          * find * -name 'f*' -o -prune -name 'm*' -- prunes all dirs
463          *     not starting with 'f' */
464
465         /* We invert TRUE bit (bit 0). Now 1 there means 'failure'.
466          * and bitwise OR in "rc |= TRUE ^ ap->f()" will:
467          * (1) make SKIP (-prune) bit stick; and (2) detect 'failure'.
468          * On return, bit is restored.  */
469
470         cur_group = -1;
471         while ((app = appp[++cur_group]) != NULL) {
472                 rc &= ~TRUE; /* 'success' so far, clear TRUE bit */
473                 cur_action = -1;
474                 while (1) {
475                         ap = app[++cur_action];
476                         if (!ap) /* all actions in group were successful */
477                                 return rc ^ TRUE; /* restore TRUE bit */
478                         rc |= TRUE ^ ap->f(fileName, statbuf, ap);
479 #if ENABLE_FEATURE_FIND_NOT
480                         if (ap->invert) rc ^= TRUE;
481 #endif
482                         dbg("grp %d action %d rc:0x%x", cur_group, cur_action, rc);
483                         if (rc & TRUE) /* current group failed, try next */
484                                 break;
485                 }
486         }
487         dbg("returning:0x%x", rc ^ TRUE);
488         return rc ^ TRUE; /* restore TRUE bit */
489 }
490
491 #if !FNM_CASEFOLD
492 static char *strcpy_upcase(char *dst, const char *src)
493 {
494         char *d = dst;
495         while (1) {
496                 unsigned char ch = *src++;
497                 if (ch >= 'a' && ch <= 'z')
498                         ch -= ('a' - 'A');
499                 *d++ = ch;
500                 if (ch == '\0')
501                         break;
502         }
503         return dst;
504 }
505 #endif
506
507 ACTF(name)
508 {
509         int r;
510         const char *tmp = bb_basename(fileName);
511         /* GNU findutils: find DIR/ -name DIR
512          * prints "DIR/" (DIR// prints "DIR//" etc).
513          * Need to strip trailing "/".
514          * Such names can come only from top-level names, but
515          * we can't do this before recursive_action() call,
516          * since then "find FILE/ -name FILE"
517          * would also work (on non-directories), which is wrong.
518          */
519         char *trunc_slash = NULL;
520
521         if (*tmp == '\0') {
522                 /* "foo/bar/[//...]" */
523                 while (tmp != fileName && tmp[-1] == '/')
524                         tmp--;
525                 if (tmp == fileName) { /* entire fileName is "//.."? */
526                         /* yes, convert "//..." to "/"
527                          * Testcases:
528                          * find / -maxdepth 1 -name /: prints /
529                          * find // -maxdepth 1 -name /: prints //
530                          * find / -maxdepth 1 -name //: prints nothing
531                          * find // -maxdepth 1 -name //: prints nothing
532                          */
533                         if (tmp[1])
534                                 trunc_slash = (char*)tmp + 1;
535                 } else {
536                         /* no, it's "foo/bar/[//...]", go back to 'b' */
537                         trunc_slash = (char*)tmp;
538                         while (tmp != fileName && tmp[-1] != '/')
539                                 tmp--;
540                 }
541         }
542
543         /* Was using FNM_PERIOD flag too,
544          * but somewhere between 4.1.20 and 4.4.0 GNU find stopped using it.
545          * find -name '*foo' should match .foo too:
546          */
547         if (trunc_slash) *trunc_slash = '\0';
548 #if FNM_CASEFOLD
549         r = fnmatch(ap->pattern, tmp, (ap->iname ? FNM_CASEFOLD : 0));
550 #else
551         if (ap->iname)
552                 tmp = strcpy_upcase(alloca(strlen(tmp) + 1), tmp);
553         r = fnmatch(ap->pattern, tmp, 0);
554 #endif
555         if (trunc_slash) *trunc_slash = '/';
556         return r == 0;
557 }
558
559 #if ENABLE_FEATURE_FIND_PATH
560 ACTF(path)
561 {
562 # if FNM_CASEFOLD
563         return fnmatch(ap->pattern, fileName, (ap->ipath ? FNM_CASEFOLD : 0)) == 0;
564 # else
565         if (ap->ipath)
566                 fileName = strcpy_upcase(alloca(strlen(fileName) + 1), fileName);
567         return fnmatch(ap->pattern, fileName, 0) == 0;
568 # endif
569 }
570 #endif
571 #if ENABLE_FEATURE_FIND_REGEX
572 ACTF(regex)
573 {
574         regmatch_t match;
575         if (regexec(&ap->compiled_pattern, fileName, 1, &match, 0 /*eflags*/))
576                 return 0; /* no match */
577         if (match.rm_so)
578                 return 0; /* match doesn't start at pos 0 */
579         if (fileName[match.rm_eo])
580                 return 0; /* match doesn't end exactly at end of pathname */
581         return 1;
582 }
583 #endif
584 #if ENABLE_FEATURE_FIND_TYPE
585 ACTF(type)
586 {
587         return ((statbuf->st_mode & S_IFMT) == ap->type_mask);
588 }
589 #endif
590 #if ENABLE_FEATURE_FIND_EXECUTABLE
591 ACTF(executable)
592 {
593         return access(fileName, X_OK) == 0;
594 }
595 #endif
596 #if ENABLE_FEATURE_FIND_PERM
597 ACTF(perm)
598 {
599         /* -perm [+/]mode: at least one of perm_mask bits are set */
600         if (ap->perm_char == '+' || ap->perm_char == '/')
601                 return (statbuf->st_mode & ap->perm_mask) != 0;
602         /* -perm -mode: all of perm_mask are set */
603         if (ap->perm_char == '-')
604                 return (statbuf->st_mode & ap->perm_mask) == ap->perm_mask;
605         /* -perm mode: file mode must match perm_mask */
606         return (statbuf->st_mode & 07777) == ap->perm_mask;
607 }
608 #endif
609 #if ENABLE_FEATURE_FIND_MTIME
610 ACTF(mtime)
611 {
612         time_t file_age = time(NULL) - statbuf->st_mtime;
613         time_t mtime_secs = ap->mtime_days * 24*60*60;
614         if (ap->mtime_char == '+')
615                 return file_age >= mtime_secs + 24*60*60;
616         if (ap->mtime_char == '-')
617                 return file_age < mtime_secs;
618         /* just numeric mtime */
619         return file_age >= mtime_secs && file_age < (mtime_secs + 24*60*60);
620 }
621 #endif
622 #if ENABLE_FEATURE_FIND_MMIN
623 ACTF(mmin)
624 {
625         time_t file_age = time(NULL) - statbuf->st_mtime;
626         time_t mmin_secs = ap->mmin_mins * 60;
627         if (ap->mmin_char == '+')
628                 return file_age >= mmin_secs + 60;
629         if (ap->mmin_char == '-')
630                 return file_age < mmin_secs;
631         /* just numeric mmin */
632         return file_age >= mmin_secs && file_age < (mmin_secs + 60);
633 }
634 #endif
635 #if ENABLE_FEATURE_FIND_NEWER
636 ACTF(newer)
637 {
638         return (ap->newer_mtime < statbuf->st_mtime);
639 }
640 #endif
641 #if ENABLE_FEATURE_FIND_INUM
642 ACTF(inum)
643 {
644         return (statbuf->st_ino == ap->inode_num);
645 }
646 #endif
647 #if ENABLE_FEATURE_FIND_EXEC
648 static int do_exec(action_exec *ap, const char *fileName)
649 {
650         int i, rc;
651 # if ENABLE_FEATURE_FIND_EXEC_PLUS
652         int size = ap->exec_argc + ap->filelist_idx + 1;
653 # else
654         int size = ap->exec_argc + 1;
655 # endif
656 # if ENABLE_USE_PORTABLE_CODE
657         char **argv = alloca(sizeof(char*) * size);
658 # else /* gcc 4.3.1 generates smaller code: */
659         char *argv[size];
660 # endif
661         char **pp = argv;
662
663         for (i = 0; i < ap->exec_argc; i++) {
664                 const char *arg = ap->exec_argv[i];
665
666 # if ENABLE_FEATURE_FIND_EXEC_PLUS
667                 if (ap->filelist) {
668                         /* Handling "-exec +"
669                          * Only one exec_argv[i] has substitution in it.
670                          * Expand that one exec_argv[i] into file list.
671                          */
672                         if (ap->subst_count[i] == 0) {
673                                 *pp++ = xstrdup(arg);
674                         } else {
675                                 int j = 0;
676                                 while (ap->filelist[j]) {
677                                         /* 2nd arg here should be ap->subst_count[i], but it is always 1: */
678                                         *pp++ = xmalloc_substitute_string(arg, 1, "{}", ap->filelist[j]);
679                                         free(ap->filelist[j]);
680                                         j++;
681                                 }
682                         }
683                 } else
684 # endif
685                 {
686                         /* Handling "-exec ;" */
687                         *pp++ = xmalloc_substitute_string(arg, ap->subst_count[i], "{}", fileName);
688                 }
689         }
690         *pp = NULL; /* terminate the list */
691
692 # if ENABLE_FEATURE_FIND_EXEC_PLUS
693         if (ap->filelist) {
694                 ap->filelist[0] = NULL;
695                 ap->filelist_idx = 0;
696                 ap->file_len = 0;
697         }
698 # endif
699
700         rc = spawn_and_wait(argv);
701         if (rc < 0)
702                 bb_simple_perror_msg(argv[0]);
703
704         i = 0;
705         while (argv[i])
706                 free(argv[i++]);
707         return rc == 0; /* return 1 if exitcode 0 */
708 }
709 ACTF(exec)
710 {
711 # if ENABLE_FEATURE_FIND_EXEC_PLUS
712         if (ap->filelist) {
713                 int rc;
714
715                 ap->filelist = xrealloc_vector(ap->filelist, 8, ap->filelist_idx);
716                 ap->filelist[ap->filelist_idx++] = xstrdup(fileName);
717                 ap->file_len += strlen(fileName) + sizeof(char*) + 1;
718                 /* If we have lots of files already, exec the command */
719                 rc = 1;
720                 if (ap->file_len >= G.max_argv_len)
721                         rc = do_exec(ap, NULL);
722                 return rc;
723         }
724 # endif
725         return do_exec(ap, fileName);
726 }
727 # if ENABLE_FEATURE_FIND_EXEC_PLUS
728 static int flush_exec_plus(void)
729 {
730         action *ap;
731         action **app;
732         action ***appp = G.actions;
733         while ((app = *appp++) != NULL) {
734                 while ((ap = *app++) != NULL) {
735                         if (ap->f == (action_fp)func_exec) {
736                                 action_exec *ae = (void*)ap;
737                                 if (ae->filelist_idx != 0) {
738                                         int rc = do_exec(ae, NULL);
739 #  if ENABLE_FEATURE_FIND_NOT
740                                         if (ap->invert) rc = !rc;
741 #  endif
742                                         if (rc == 0)
743                                                 return 1;
744                                 }
745                         }
746                 }
747         }
748         return 0;
749 }
750 # endif
751 #endif
752 #if ENABLE_FEATURE_FIND_USER
753 ACTF(user)
754 {
755         return (statbuf->st_uid == ap->uid);
756 }
757 #endif
758 #if ENABLE_FEATURE_FIND_GROUP
759 ACTF(group)
760 {
761         return (statbuf->st_gid == ap->gid);
762 }
763 #endif
764 #if ENABLE_FEATURE_FIND_PRINT0
765 ACTF(print0)
766 {
767         printf("%s%c", fileName, '\0');
768         return TRUE;
769 }
770 #endif
771 ACTF(print)
772 {
773         puts(fileName);
774         return TRUE;
775 }
776 #if ENABLE_FEATURE_FIND_PAREN
777 ACTF(paren)
778 {
779         return exec_actions(ap->subexpr, fileName, statbuf);
780 }
781 #endif
782 #if ENABLE_FEATURE_FIND_SIZE
783 ACTF(size)
784 {
785         if (ap->size_char == '+')
786                 return statbuf->st_size > ap->size;
787         if (ap->size_char == '-')
788                 return statbuf->st_size < ap->size;
789         return statbuf->st_size == ap->size;
790 }
791 #endif
792 #if ENABLE_FEATURE_FIND_PRUNE
793 /*
794  * -prune: if -depth is not given, return true and do not descend
795  * current dir; if -depth is given, return false with no effect.
796  * Example:
797  * find dir -name 'asm-*' -prune -o -name '*.[chS]' -print
798  */
799 ACTF(prune)
800 {
801         return SKIP + TRUE;
802 }
803 #endif
804 #if ENABLE_FEATURE_FIND_QUIT
805 ACTF(quit)
806 {
807         exit(G.exitstatus);
808 }
809 #endif
810 #if ENABLE_FEATURE_FIND_DELETE
811 ACTF(delete)
812 {
813         int rc;
814         if (S_ISDIR(statbuf->st_mode)) {
815                 /* "find . -delete" skips rmdir(".") */
816                 rc = 0;
817                 if (NOT_LONE_CHAR(fileName, '.'))
818                         rc = rmdir(fileName);
819         } else {
820                 rc = unlink(fileName);
821         }
822         if (rc < 0)
823                 bb_simple_perror_msg(fileName);
824         return TRUE;
825 }
826 #endif
827 #if ENABLE_FEATURE_FIND_CONTEXT
828 ACTF(context)
829 {
830         security_context_t con;
831         int rc;
832
833         if (G.recurse_flags & ACTION_FOLLOWLINKS) {
834                 rc = getfilecon(fileName, &con);
835         } else {
836                 rc = lgetfilecon(fileName, &con);
837         }
838         if (rc < 0)
839                 return FALSE;
840         rc = strcmp(ap->context, con);
841         freecon(con);
842         return rc == 0;
843 }
844 #endif
845 #if ENABLE_FEATURE_FIND_LINKS
846 ACTF(links)
847 {
848         switch(ap->links_char) {
849         case '-' : return (statbuf->st_nlink <  ap->links_count);
850         case '+' : return (statbuf->st_nlink >  ap->links_count);
851         default:   return (statbuf->st_nlink == ap->links_count);
852         }
853 }
854 #endif
855
856 static int FAST_FUNC fileAction(const char *fileName,
857                 struct stat *statbuf,
858                 void *userData UNUSED_PARAM,
859                 int depth IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM))
860 {
861         int r;
862         int same_fs = 1;
863
864 #if ENABLE_FEATURE_FIND_XDEV
865         if (S_ISDIR(statbuf->st_mode) && G.xdev_count) {
866                 int i;
867                 for (i = 0; i < G.xdev_count; i++) {
868                         if (G.xdev_dev[i] == statbuf->st_dev)
869                                 goto found;
870                 }
871                 //bb_error_msg("'%s': not same fs", fileName);
872                 same_fs = 0;
873  found: ;
874         }
875 #endif
876
877 #if ENABLE_FEATURE_FIND_MAXDEPTH
878         if (depth < G.minmaxdepth[0]) {
879                 if (same_fs)
880                         return TRUE; /* skip this, continue recursing */
881                 return SKIP; /* stop recursing */
882         }
883         if (depth > G.minmaxdepth[1])
884                 return SKIP; /* stop recursing */
885 #endif
886
887         r = exec_actions(G.actions, fileName, statbuf);
888         /* Had no explicit -print[0] or -exec? then print */
889         if ((r & TRUE) && G.need_print)
890                 puts(fileName);
891
892 #if ENABLE_FEATURE_FIND_MAXDEPTH
893         if (S_ISDIR(statbuf->st_mode)) {
894                 if (depth == G.minmaxdepth[1])
895                         return SKIP;
896         }
897 #endif
898         /* -xdev stops on mountpoints, but AFTER mountpoit itself
899          * is processed as usual */
900         if (!same_fs) {
901                 return SKIP;
902         }
903
904         /* Cannot return 0: our caller, recursive_action(),
905          * will perror() and skip dirs (if called on dir) */
906         return (r & SKIP) ? SKIP : TRUE;
907 }
908
909
910 #if ENABLE_FEATURE_FIND_TYPE
911 static int find_type(const char *type)
912 {
913         int mask = 0;
914
915         if (*type == 'b')
916                 mask = S_IFBLK;
917         else if (*type == 'c')
918                 mask = S_IFCHR;
919         else if (*type == 'd')
920                 mask = S_IFDIR;
921         else if (*type == 'p')
922                 mask = S_IFIFO;
923         else if (*type == 'f')
924                 mask = S_IFREG;
925         else if (*type == 'l')
926                 mask = S_IFLNK;
927         else if (*type == 's')
928                 mask = S_IFSOCK;
929
930         if (mask == 0 || type[1] != '\0')
931                 bb_error_msg_and_die(bb_msg_invalid_arg_to, type, "-type");
932
933         return mask;
934 }
935 #endif
936
937 #if ENABLE_FEATURE_FIND_PERM \
938  || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \
939  || ENABLE_FEATURE_FIND_SIZE  || ENABLE_FEATURE_FIND_LINKS
940 static const char* plus_minus_num(const char* str)
941 {
942         if (*str == '-' || *str == '+')
943                 str++;
944         return str;
945 }
946 #endif
947
948 /* Say no to GCCism */
949 #define USE_NESTED_FUNCTION 0
950
951 #if !USE_NESTED_FUNCTION
952 struct pp_locals {
953         action*** appp;
954         unsigned cur_group;
955         unsigned cur_action;
956         IF_FEATURE_FIND_NOT( bool invert_flag; )
957 };
958 static action* alloc_action(struct pp_locals *ppl, int sizeof_struct, action_fp f)
959 {
960         action *ap = xzalloc(sizeof_struct);
961         action **app;
962         action ***group = &ppl->appp[ppl->cur_group];
963         *group = app = xrealloc(*group, (ppl->cur_action+2) * sizeof(ppl->appp[0][0]));
964         app[ppl->cur_action++] = ap;
965         app[ppl->cur_action] = NULL;
966         ap->f = f;
967         IF_FEATURE_FIND_NOT( ap->invert = ppl->invert_flag; )
968         IF_FEATURE_FIND_NOT( ppl->invert_flag = 0; )
969         return ap;
970 }
971 #endif
972
973 static action*** parse_params(char **argv)
974 {
975         enum {
976                                 OPT_FOLLOW     ,
977         IF_FEATURE_FIND_XDEV(   OPT_XDEV       ,)
978         IF_FEATURE_FIND_DEPTH(  OPT_DEPTH      ,)
979                                 PARM_a         ,
980                                 PARM_o         ,
981         IF_FEATURE_FIND_NOT(    PARM_char_not  ,)
982 #if ENABLE_DESKTOP
983                                 PARM_and       ,
984                                 PARM_or        ,
985         IF_FEATURE_FIND_NOT(    PARM_not       ,)
986 #endif
987                                 PARM_print     ,
988         IF_FEATURE_FIND_PRINT0( PARM_print0    ,)
989         IF_FEATURE_FIND_PRUNE(  PARM_prune     ,)
990         IF_FEATURE_FIND_QUIT(   PARM_quit      ,)
991         IF_FEATURE_FIND_DELETE( PARM_delete    ,)
992         IF_FEATURE_FIND_EXEC(   PARM_exec      ,)
993         IF_FEATURE_FIND_EXECUTABLE(PARM_executable,)
994         IF_FEATURE_FIND_PAREN(  PARM_char_brace,)
995         /* All options/actions starting from here require argument */
996                                 PARM_name      ,
997                                 PARM_iname     ,
998         IF_FEATURE_FIND_PATH(   PARM_path      ,)
999 #if ENABLE_DESKTOP
1000         /* -wholename is a synonym for -path */
1001         /* We support it because Linux kernel's "make tags" uses it */
1002         IF_FEATURE_FIND_PATH(   PARM_wholename ,)
1003 #endif
1004         IF_FEATURE_FIND_PATH(   PARM_ipath     ,)
1005         IF_FEATURE_FIND_REGEX(  PARM_regex     ,)
1006         IF_FEATURE_FIND_TYPE(   PARM_type      ,)
1007         IF_FEATURE_FIND_PERM(   PARM_perm      ,)
1008         IF_FEATURE_FIND_MTIME(  PARM_mtime     ,)
1009         IF_FEATURE_FIND_MMIN(   PARM_mmin      ,)
1010         IF_FEATURE_FIND_NEWER(  PARM_newer     ,)
1011         IF_FEATURE_FIND_INUM(   PARM_inum      ,)
1012         IF_FEATURE_FIND_USER(   PARM_user      ,)
1013         IF_FEATURE_FIND_GROUP(  PARM_group     ,)
1014         IF_FEATURE_FIND_SIZE(   PARM_size      ,)
1015         IF_FEATURE_FIND_CONTEXT(PARM_context   ,)
1016         IF_FEATURE_FIND_LINKS(  PARM_links     ,)
1017         IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,OPT_MAXDEPTH,)
1018         };
1019
1020         static const char params[] ALIGN1 =
1021                                 "-follow\0"
1022         IF_FEATURE_FIND_XDEV(   "-xdev\0"                 )
1023         IF_FEATURE_FIND_DEPTH(  "-depth\0"                )
1024                                 "-a\0"
1025                                 "-o\0"
1026         IF_FEATURE_FIND_NOT(    "!\0"       )
1027 #if ENABLE_DESKTOP
1028                                 "-and\0"
1029                                 "-or\0"
1030         IF_FEATURE_FIND_NOT(    "-not\0"    )
1031 #endif
1032                                 "-print\0"
1033         IF_FEATURE_FIND_PRINT0( "-print0\0" )
1034         IF_FEATURE_FIND_PRUNE(  "-prune\0"  )
1035         IF_FEATURE_FIND_QUIT(   "-quit\0"  )
1036         IF_FEATURE_FIND_DELETE( "-delete\0" )
1037         IF_FEATURE_FIND_EXEC(   "-exec\0"   )
1038         IF_FEATURE_FIND_EXECUTABLE("-executable\0")
1039         IF_FEATURE_FIND_PAREN(  "(\0"       )
1040         /* All options/actions starting from here require argument */
1041                                 "-name\0"
1042                                 "-iname\0"
1043         IF_FEATURE_FIND_PATH(   "-path\0"   )
1044 #if ENABLE_DESKTOP
1045         IF_FEATURE_FIND_PATH(   "-wholename\0")
1046 #endif
1047         IF_FEATURE_FIND_PATH(   "-ipath\0"  )
1048         IF_FEATURE_FIND_REGEX(  "-regex\0"  )
1049         IF_FEATURE_FIND_TYPE(   "-type\0"   )
1050         IF_FEATURE_FIND_PERM(   "-perm\0"   )
1051         IF_FEATURE_FIND_MTIME(  "-mtime\0"  )
1052         IF_FEATURE_FIND_MMIN(   "-mmin\0"   )
1053         IF_FEATURE_FIND_NEWER(  "-newer\0"  )
1054         IF_FEATURE_FIND_INUM(   "-inum\0"   )
1055         IF_FEATURE_FIND_USER(   "-user\0"   )
1056         IF_FEATURE_FIND_GROUP(  "-group\0"  )
1057         IF_FEATURE_FIND_SIZE(   "-size\0"   )
1058         IF_FEATURE_FIND_CONTEXT("-context\0")
1059         IF_FEATURE_FIND_LINKS(  "-links\0"  )
1060         IF_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0")
1061         ;
1062
1063 #if !USE_NESTED_FUNCTION
1064         struct pp_locals ppl;
1065 #define appp        (ppl.appp       )
1066 #define cur_group   (ppl.cur_group  )
1067 #define cur_action  (ppl.cur_action )
1068 #define invert_flag (ppl.invert_flag)
1069 #define ALLOC_ACTION(name) (action_##name*)alloc_action(&ppl, sizeof(action_##name), (action_fp) func_##name)
1070 #else
1071         action*** appp;
1072         unsigned cur_group;
1073         unsigned cur_action;
1074         IF_FEATURE_FIND_NOT( bool invert_flag; )
1075
1076         /* This is the only place in busybox where we use nested function.
1077          * So far more standard alternatives were bigger. */
1078         /* Auto decl suppresses "func without a prototype" warning: */
1079         auto action* alloc_action(int sizeof_struct, action_fp f);
1080         action* alloc_action(int sizeof_struct, action_fp f)
1081         {
1082                 action *ap;
1083                 appp[cur_group] = xrealloc(appp[cur_group], (cur_action+2) * sizeof(appp[0][0]));
1084                 appp[cur_group][cur_action++] = ap = xzalloc(sizeof_struct);
1085                 appp[cur_group][cur_action] = NULL;
1086                 ap->f = f;
1087                 IF_FEATURE_FIND_NOT( ap->invert = invert_flag; )
1088                 IF_FEATURE_FIND_NOT( invert_flag = 0; )
1089                 return ap;
1090         }
1091 #define ALLOC_ACTION(name) (action_##name*)alloc_action(sizeof(action_##name), (action_fp) func_##name)
1092 #endif
1093
1094         cur_group = 0;
1095         cur_action = 0;
1096         IF_FEATURE_FIND_NOT( invert_flag = 0; )
1097         appp = xzalloc(2 * sizeof(appp[0])); /* appp[0],[1] == NULL */
1098
1099         while (*argv) {
1100                 const char *arg = argv[0];
1101                 int parm = index_in_strings(params, arg);
1102                 const char *arg1 = argv[1];
1103
1104                 dbg("arg:'%s' arg1:'%s' parm:%d PARM_type:%d", arg, arg1, parm, PARM_type);
1105
1106                 if (parm >= PARM_name) {
1107                         /* All options/actions starting from -name require argument */
1108                         if (!arg1)
1109                                 bb_error_msg_and_die(bb_msg_requires_arg, arg);
1110                         argv++;
1111                 }
1112
1113                 /* We can use big switch() here, but on i386
1114                  * it doesn't give smaller code. Other arches? */
1115
1116 /* Options always return true. They always take effect
1117  * rather than being processed only when their place in the
1118  * expression is reached.
1119  */
1120                 /* Options */
1121                 if (parm == OPT_FOLLOW) {
1122                         dbg("follow enabled: %d", __LINE__);
1123                         G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK;
1124                 }
1125 #if ENABLE_FEATURE_FIND_XDEV
1126                 else if (parm == OPT_XDEV) {
1127                         dbg("%d", __LINE__);
1128                         G.xdev_on = 1;
1129                 }
1130 #endif
1131 #if ENABLE_FEATURE_FIND_MAXDEPTH
1132                 else if (parm == OPT_MINDEPTH || parm == OPT_MINDEPTH + 1) {
1133                         dbg("%d", __LINE__);
1134                         G.minmaxdepth[parm - OPT_MINDEPTH] = xatoi_positive(arg1);
1135                 }
1136 #endif
1137 #if ENABLE_FEATURE_FIND_DEPTH
1138                 else if (parm == OPT_DEPTH) {
1139                         dbg("%d", __LINE__);
1140                         G.recurse_flags |= ACTION_DEPTHFIRST;
1141                 }
1142 #endif
1143 /* Actions are grouped by operators
1144  * ( expr )              Force precedence
1145  * ! expr                True if expr is false
1146  * -not expr             Same as ! expr
1147  * expr1 [-a[nd]] expr2  And; expr2 is not evaluated if expr1 is false
1148  * expr1 -o[r] expr2     Or; expr2 is not evaluated if expr1 is true
1149  * expr1 , expr2         List; both expr1 and expr2 are always evaluated
1150  * We implement: (), -a, -o
1151  */
1152                 /* Operators */
1153                 else if (parm == PARM_a IF_DESKTOP(|| parm == PARM_and)) {
1154                         dbg("%d", __LINE__);
1155                         /* no further special handling required */
1156                 }
1157                 else if (parm == PARM_o IF_DESKTOP(|| parm == PARM_or)) {
1158                         dbg("%d", __LINE__);
1159                         /* start new OR group */
1160                         cur_group++;
1161                         appp = xrealloc(appp, (cur_group+2) * sizeof(appp[0]));
1162                         /*appp[cur_group] = NULL; - already NULL */
1163                         appp[cur_group+1] = NULL;
1164                         cur_action = 0;
1165                 }
1166 #if ENABLE_FEATURE_FIND_NOT
1167                 else if (parm == PARM_char_not IF_DESKTOP(|| parm == PARM_not)) {
1168                         /* also handles "find ! ! -name 'foo*'" */
1169                         invert_flag ^= 1;
1170                         dbg("invert_flag:%d", invert_flag);
1171                 }
1172 #endif
1173                 /* Actions */
1174                 else if (parm == PARM_print) {
1175                         dbg("%d", __LINE__);
1176                         G.need_print = 0;
1177                         (void) ALLOC_ACTION(print);
1178                 }
1179 #if ENABLE_FEATURE_FIND_PRINT0
1180                 else if (parm == PARM_print0) {
1181                         dbg("%d", __LINE__);
1182                         G.need_print = 0;
1183                         (void) ALLOC_ACTION(print0);
1184                 }
1185 #endif
1186 #if ENABLE_FEATURE_FIND_PRUNE
1187                 else if (parm == PARM_prune) {
1188                         dbg("%d", __LINE__);
1189                         (void) ALLOC_ACTION(prune);
1190                 }
1191 #endif
1192 #if ENABLE_FEATURE_FIND_QUIT
1193                 else if (parm == PARM_quit) {
1194                         dbg("%d", __LINE__);
1195                         (void) ALLOC_ACTION(quit);
1196                 }
1197 #endif
1198 #if ENABLE_FEATURE_FIND_DELETE
1199                 else if (parm == PARM_delete) {
1200                         dbg("%d", __LINE__);
1201                         G.need_print = 0;
1202                         G.recurse_flags |= ACTION_DEPTHFIRST;
1203                         (void) ALLOC_ACTION(delete);
1204                 }
1205 #endif
1206 #if ENABLE_FEATURE_FIND_EXEC
1207                 else if (parm == PARM_exec) {
1208                         int i;
1209                         action_exec *ap;
1210                         IF_FEATURE_FIND_EXEC_PLUS(int all_subst = 0;)
1211                         dbg("%d", __LINE__);
1212                         G.need_print = 0;
1213                         ap = ALLOC_ACTION(exec);
1214                         ap->exec_argv = ++argv; /* first arg after -exec */
1215                         /*ap->exec_argc = 0; - ALLOC_ACTION did it */
1216                         while (1) {
1217                                 if (!*argv) /* did not see ';' or '+' until end */
1218                                         bb_error_msg_and_die(bb_msg_requires_arg, "-exec");
1219                                 // find -exec echo Foo ">{}<" ";"
1220                                 // executes "echo Foo >FILENAME<",
1221                                 // find -exec echo Foo ">{}<" "+"
1222                                 // executes "echo Foo FILENAME1 FILENAME2 FILENAME3...".
1223                                 if ((argv[0][0] == ';' || argv[0][0] == '+')
1224                                  && argv[0][1] == '\0'
1225                                 ) {
1226 # if ENABLE_FEATURE_FIND_EXEC_PLUS
1227                                         if (argv[0][0] == '+')
1228                                                 ap->filelist = xzalloc(sizeof(ap->filelist[0]));
1229 # endif
1230                                         break;
1231                                 }
1232                                 argv++;
1233                                 ap->exec_argc++;
1234                         }
1235                         if (ap->exec_argc == 0)
1236                                 bb_error_msg_and_die(bb_msg_requires_arg, arg);
1237                         ap->subst_count = xmalloc(ap->exec_argc * sizeof(int));
1238                         i = ap->exec_argc;
1239                         while (i--) {
1240                                 ap->subst_count[i] = count_strstr(ap->exec_argv[i], "{}");
1241                                 IF_FEATURE_FIND_EXEC_PLUS(all_subst += ap->subst_count[i];)
1242                         }
1243 # if ENABLE_FEATURE_FIND_EXEC_PLUS
1244                         /*
1245                          * coreutils expects {} to appear only once in "-exec +"
1246                          */
1247                         if (all_subst != 1 && ap->filelist)
1248                                 bb_error_msg_and_die("only one '{}' allowed for -exec +");
1249 # endif
1250                 }
1251 #endif
1252 #if ENABLE_FEATURE_FIND_PAREN
1253                 else if (parm == PARM_char_brace) {
1254                         action_paren *ap;
1255                         char **endarg;
1256                         unsigned nested = 1;
1257
1258                         dbg("%d", __LINE__);
1259                         endarg = argv;
1260                         while (1) {
1261                                 if (!*++endarg)
1262                                         bb_error_msg_and_die("unpaired '('");
1263                                 if (LONE_CHAR(*endarg, '('))
1264                                         nested++;
1265                                 else if (LONE_CHAR(*endarg, ')') && !--nested) {
1266                                         *endarg = NULL;
1267                                         break;
1268                                 }
1269                         }
1270                         ap = ALLOC_ACTION(paren);
1271                         ap->subexpr = parse_params(argv + 1);
1272                         *endarg = (char*) ")"; /* restore NULLed parameter */
1273                         argv = endarg;
1274                 }
1275 #endif
1276                 else if (parm == PARM_name || parm == PARM_iname) {
1277                         action_name *ap;
1278                         dbg("%d", __LINE__);
1279                         ap = ALLOC_ACTION(name);
1280                         ap->pattern = arg1;
1281                         ap->iname = (parm == PARM_iname);
1282                 }
1283 #if ENABLE_FEATURE_FIND_PATH
1284                 else if (parm == PARM_path IF_DESKTOP(|| parm == PARM_wholename) || parm == PARM_ipath) {
1285                         action_path *ap;
1286                         dbg("%d", __LINE__);
1287                         ap = ALLOC_ACTION(path);
1288                         ap->pattern = arg1;
1289                         ap->ipath = (parm == PARM_ipath);
1290                 }
1291 #endif
1292 #if ENABLE_FEATURE_FIND_REGEX
1293                 else if (parm == PARM_regex) {
1294                         action_regex *ap;
1295                         dbg("%d", __LINE__);
1296                         ap = ALLOC_ACTION(regex);
1297                         xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/);
1298                 }
1299 #endif
1300 #if ENABLE_FEATURE_FIND_TYPE
1301                 else if (parm == PARM_type) {
1302                         action_type *ap;
1303                         ap = ALLOC_ACTION(type);
1304                         ap->type_mask = find_type(arg1);
1305                         dbg("created:type mask:%x", ap->type_mask);
1306                 }
1307 #endif
1308 #if ENABLE_FEATURE_FIND_EXECUTABLE
1309                 else if (parm == PARM_executable) {
1310                         (void) ALLOC_ACTION(executable);
1311                 }
1312 #endif
1313 #if ENABLE_FEATURE_FIND_PERM
1314 /* -perm BITS   File's mode bits are exactly BITS (octal or symbolic).
1315  *              Symbolic modes use mode 0 as a point of departure.
1316  * -perm -BITS  All of the BITS are set in file's mode.
1317  * -perm [+/]BITS  At least one of the BITS is set in file's mode.
1318  */
1319                 else if (parm == PARM_perm) {
1320                         action_perm *ap;
1321                         dbg("%d", __LINE__);
1322                         ap = ALLOC_ACTION(perm);
1323                         ap->perm_char = arg1[0];
1324                         arg1 = (arg1[0] == '/' ? arg1+1 : plus_minus_num(arg1));
1325                         /*ap->perm_mask = 0; - ALLOC_ACTION did it */
1326                         ap->perm_mask = bb_parse_mode(arg1, ap->perm_mask);
1327                         if (ap->perm_mask == (mode_t)-1)
1328                                 bb_error_msg_and_die("invalid mode '%s'", arg1);
1329                 }
1330 #endif
1331 #if ENABLE_FEATURE_FIND_MTIME
1332                 else if (parm == PARM_mtime) {
1333                         action_mtime *ap;
1334                         dbg("%d", __LINE__);
1335                         ap = ALLOC_ACTION(mtime);
1336                         ap->mtime_char = arg1[0];
1337                         ap->mtime_days = xatoul(plus_minus_num(arg1));
1338                 }
1339 #endif
1340 #if ENABLE_FEATURE_FIND_MMIN
1341                 else if (parm == PARM_mmin) {
1342                         action_mmin *ap;
1343                         dbg("%d", __LINE__);
1344                         ap = ALLOC_ACTION(mmin);
1345                         ap->mmin_char = arg1[0];
1346                         ap->mmin_mins = xatoul(plus_minus_num(arg1));
1347                 }
1348 #endif
1349 #if ENABLE_FEATURE_FIND_NEWER
1350                 else if (parm == PARM_newer) {
1351                         struct stat stat_newer;
1352                         action_newer *ap;
1353                         dbg("%d", __LINE__);
1354                         ap = ALLOC_ACTION(newer);
1355                         xstat(arg1, &stat_newer);
1356                         ap->newer_mtime = stat_newer.st_mtime;
1357                 }
1358 #endif
1359 #if ENABLE_FEATURE_FIND_INUM
1360                 else if (parm == PARM_inum) {
1361                         action_inum *ap;
1362                         dbg("%d", __LINE__);
1363                         ap = ALLOC_ACTION(inum);
1364                         ap->inode_num = xatoul(arg1);
1365                 }
1366 #endif
1367 #if ENABLE_FEATURE_FIND_USER
1368                 else if (parm == PARM_user) {
1369                         action_user *ap;
1370                         dbg("%d", __LINE__);
1371                         ap = ALLOC_ACTION(user);
1372                         ap->uid = bb_strtou(arg1, NULL, 10);
1373                         if (errno)
1374                                 ap->uid = xuname2uid(arg1);
1375                 }
1376 #endif
1377 #if ENABLE_FEATURE_FIND_GROUP
1378                 else if (parm == PARM_group) {
1379                         action_group *ap;
1380                         dbg("%d", __LINE__);
1381                         ap = ALLOC_ACTION(group);
1382                         ap->gid = bb_strtou(arg1, NULL, 10);
1383                         if (errno)
1384                                 ap->gid = xgroup2gid(arg1);
1385                 }
1386 #endif
1387 #if ENABLE_FEATURE_FIND_SIZE
1388                 else if (parm == PARM_size) {
1389 /* -size n[bckw]: file uses n units of space
1390  * b (default): units are 512-byte blocks
1391  * c: 1 byte
1392  * k: kilobytes
1393  * w: 2-byte words
1394  */
1395 #if ENABLE_LFS
1396 #define XATOU_SFX xatoull_sfx
1397 #else
1398 #define XATOU_SFX xatoul_sfx
1399 #endif
1400                         static const struct suffix_mult find_suffixes[] = {
1401                                 { "c", 1 },
1402                                 { "w", 2 },
1403                                 { "", 512 },
1404                                 { "b", 512 },
1405                                 { "k", 1024 },
1406                                 { "", 0 }
1407                         };
1408                         action_size *ap;
1409                         dbg("%d", __LINE__);
1410                         ap = ALLOC_ACTION(size);
1411                         ap->size_char = arg1[0];
1412                         ap->size = XATOU_SFX(plus_minus_num(arg1), find_suffixes);
1413                 }
1414 #endif
1415 #if ENABLE_FEATURE_FIND_CONTEXT
1416                 else if (parm == PARM_context) {
1417                         action_context *ap;
1418                         dbg("%d", __LINE__);
1419                         ap = ALLOC_ACTION(context);
1420                         /*ap->context = NULL; - ALLOC_ACTION did it */
1421                         /* SELinux headers erroneously declare non-const parameter */
1422                         if (selinux_raw_to_trans_context((char*)arg1, &ap->context))
1423                                 bb_simple_perror_msg(arg1);
1424                 }
1425 #endif
1426 #if ENABLE_FEATURE_FIND_LINKS
1427                 else if (parm == PARM_links) {
1428                         action_links *ap;
1429                         dbg("%d", __LINE__);
1430                         ap = ALLOC_ACTION(links);
1431                         ap->links_char = arg1[0];
1432                         ap->links_count = xatoul(plus_minus_num(arg1));
1433                 }
1434 #endif
1435                 else {
1436                         bb_error_msg("unrecognized: %s", arg);
1437                         bb_show_usage();
1438                 }
1439                 argv++;
1440         }
1441         dbg("exiting %s", __func__);
1442         return appp;
1443 #undef ALLOC_ACTION
1444 #undef appp
1445 #undef cur_action
1446 #undef invert_flag
1447 }
1448
1449 int find_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1450 int find_main(int argc UNUSED_PARAM, char **argv)
1451 {
1452         int i, firstopt;
1453         char **past_HLP, *saved;
1454
1455         INIT_G();
1456
1457         /* "find -type f" + getopt("+HLP") => disaster.
1458          * Need to avoid getopt running into a non-HLP option.
1459          * Do this by temporarily storing NULL there:
1460          */
1461         past_HLP = argv;
1462         for (;;) {
1463                 saved = *++past_HLP;
1464                 if (!saved)
1465                         break;
1466                 if (saved[0] != '-')
1467                         break;
1468                 if (!saved[1])
1469                         break; /* it is "-" */
1470                 if ((saved+1)[strspn(saved+1, "HLP")] != '\0')
1471                         break;
1472         }
1473         *past_HLP = NULL;
1474         /* "+": stop on first non-option */
1475         i = getopt32(argv, "+HLP");
1476         if (i & (1<<0))
1477                 G.recurse_flags |= ACTION_FOLLOWLINKS_L0 | ACTION_DANGLING_OK;
1478         if (i & (1<<1))
1479                 G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK;
1480         /* -P is default and is ignored */
1481         argv = past_HLP; /* same result as "argv += optind;" */
1482         *past_HLP = saved;
1483
1484         for (firstopt = 0; argv[firstopt]; firstopt++) {
1485                 if (argv[firstopt][0] == '-')
1486                         break;
1487                 if (ENABLE_FEATURE_FIND_NOT && LONE_CHAR(argv[firstopt], '!'))
1488                         break;
1489                 if (ENABLE_FEATURE_FIND_PAREN && LONE_CHAR(argv[firstopt], '('))
1490                         break;
1491         }
1492         if (firstopt == 0) {
1493                 *--argv = (char*)".";
1494                 firstopt++;
1495         }
1496
1497         G.actions = parse_params(&argv[firstopt]);
1498         argv[firstopt] = NULL;
1499
1500 #if ENABLE_FEATURE_FIND_XDEV
1501         if (G.xdev_on) {
1502                 struct stat stbuf;
1503
1504                 G.xdev_count = firstopt;
1505                 G.xdev_dev = xzalloc(G.xdev_count * sizeof(G.xdev_dev[0]));
1506                 for (i = 0; argv[i]; i++) {
1507                         /* not xstat(): shouldn't bomb out on
1508                          * "find not_exist exist -xdev" */
1509                         if (stat(argv[i], &stbuf) == 0)
1510                                 G.xdev_dev[i] = stbuf.st_dev;
1511                         /* else G.xdev_dev[i] stays 0 and
1512                          * won't match any real device dev_t
1513                          */
1514                 }
1515         }
1516 #endif
1517
1518         for (i = 0; argv[i]; i++) {
1519                 if (!recursive_action(argv[i],
1520                                 G.recurse_flags,/* flags */
1521                                 fileAction,     /* file action */
1522                                 fileAction,     /* dir action */
1523                                 NULL,           /* user data */
1524                                 0)              /* depth */
1525                 ) {
1526                         G.exitstatus |= EXIT_FAILURE;
1527                 }
1528         }
1529
1530         IF_FEATURE_FIND_EXEC_PLUS(G.exitstatus |= flush_exec_plus();)
1531         return G.exitstatus;
1532 }