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cce855bc JA |
1 | /* findcmd.c -- Functions to search for commands by name. */ |
2 | ||
3185942a | 3 | /* Copyright (C) 1997-2009 Free Software Foundation, Inc. |
cce855bc JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
3185942a JA |
7 | Bash is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
cce855bc | 11 | |
3185942a JA |
12 | Bash is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
cce855bc JA |
16 | |
17 | You should have received a copy of the GNU General Public License | |
3185942a JA |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. |
19 | */ | |
cce855bc JA |
20 | |
21 | #include "config.h" | |
22 | ||
23 | #include <stdio.h> | |
f73dda09 | 24 | #include "chartypes.h" |
cce855bc | 25 | #include "bashtypes.h" |
b80f6443 | 26 | #if !defined (_MINIX) && defined (HAVE_SYS_FILE_H) |
cce855bc JA |
27 | # include <sys/file.h> |
28 | #endif | |
29 | #include "filecntl.h" | |
30 | #include "posixstat.h" | |
31 | ||
32 | #if defined (HAVE_UNISTD_H) | |
33 | # include <unistd.h> | |
34 | #endif | |
495aee44 | 35 | #include <errno.h> |
cce855bc | 36 | |
cce855bc JA |
37 | #include "bashansi.h" |
38 | ||
39 | #include "memalloc.h" | |
40 | #include "shell.h" | |
41 | #include "flags.h" | |
42 | #include "hashlib.h" | |
43 | #include "pathexp.h" | |
44 | #include "hashcmd.h" | |
f73dda09 | 45 | #include "findcmd.h" /* matching prototypes and declarations */ |
cce855bc | 46 | |
495aee44 CR |
47 | #if !defined (errno) |
48 | extern int errno; | |
49 | #endif | |
50 | ||
cce855bc JA |
51 | extern int posixly_correct; |
52 | ||
53 | /* Static functions defined and used in this file. */ | |
f73dda09 JA |
54 | static char *_find_user_command_internal __P((const char *, int)); |
55 | static char *find_user_command_internal __P((const char *, int)); | |
56 | static char *find_user_command_in_path __P((const char *, char *, int)); | |
57 | static char *find_in_path_element __P((const char *, char *, int, int, struct stat *)); | |
58 | static char *find_absolute_program __P((const char *, int)); | |
59 | ||
60 | static char *get_next_path_element __P((char *, int *)); | |
cce855bc JA |
61 | |
62 | /* The file name which we would try to execute, except that it isn't | |
63 | possible to execute it. This is the first file that matches the | |
64 | name that we are looking for while we are searching $PATH for a | |
65 | suitable one to execute. If we cannot find a suitable executable | |
66 | file, then we use this one. */ | |
67 | static char *file_to_lose_on; | |
68 | ||
69 | /* Non-zero if we should stat every command found in the hash table to | |
70 | make sure it still exists. */ | |
71 | int check_hashed_filenames; | |
72 | ||
73 | /* DOT_FOUND_IN_SEARCH becomes non-zero when find_user_command () | |
74 | encounters a `.' as the directory pathname while scanning the | |
75 | list of possible pathnames; i.e., if `.' comes before the directory | |
76 | containing the file of interest. */ | |
77 | int dot_found_in_search = 0; | |
78 | ||
cce855bc JA |
79 | /* Return some flags based on information about this file. |
80 | The EXISTS bit is non-zero if the file is found. | |
81 | The EXECABLE bit is non-zero the file is executble. | |
82 | Zero is returned if the file is not found. */ | |
83 | int | |
84 | file_status (name) | |
f73dda09 | 85 | const char *name; |
cce855bc JA |
86 | { |
87 | struct stat finfo; | |
95732b49 | 88 | int r; |
cce855bc JA |
89 | |
90 | /* Determine whether this file exists or not. */ | |
91 | if (stat (name, &finfo) < 0) | |
92 | return (0); | |
93 | ||
94 | /* If the file is a directory, then it is not "executable" in the | |
95 | sense of the shell. */ | |
96 | if (S_ISDIR (finfo.st_mode)) | |
97 | return (FS_EXISTS|FS_DIRECTORY); | |
98 | ||
95732b49 JA |
99 | r = FS_EXISTS; |
100 | ||
0001803f CR |
101 | #if defined (HAVE_EACCESS) |
102 | /* Use eaccess(2) if we have it to take things like ACLs and other | |
103 | file access mechanisms into account. eaccess uses the effective | |
104 | user and group IDs, not the real ones. We could use sh_eaccess, | |
105 | but we don't want any special treatment for /dev/fd. */ | |
106 | if (eaccess (name, X_OK) == 0) | |
107 | r |= FS_EXECABLE; | |
108 | if (eaccess (name, R_OK) == 0) | |
109 | r |= FS_READABLE; | |
110 | ||
111 | return r; | |
112 | #elif defined (AFS) | |
cce855bc JA |
113 | /* We have to use access(2) to determine access because AFS does not |
114 | support Unix file system semantics. This may produce wrong | |
115 | answers for non-AFS files when ruid != euid. I hate AFS. */ | |
95732b49 JA |
116 | if (access (name, X_OK) == 0) |
117 | r |= FS_EXECABLE; | |
118 | if (access (name, R_OK) == 0) | |
119 | r |= FS_READABLE; | |
120 | ||
121 | return r; | |
0001803f | 122 | #else /* !HAVE_EACCESS && !AFS */ |
cce855bc JA |
123 | |
124 | /* Find out if the file is actually executable. By definition, the | |
125 | only other criteria is that the file has an execute bit set that | |
95732b49 | 126 | we can use. The same with whether or not a file is readable. */ |
cce855bc JA |
127 | |
128 | /* Root only requires execute permission for any of owner, group or | |
95732b49 | 129 | others to be able to exec a file, and can read any file. */ |
cce855bc JA |
130 | if (current_user.euid == (uid_t)0) |
131 | { | |
95732b49 JA |
132 | r |= FS_READABLE; |
133 | if (finfo.st_mode & S_IXUGO) | |
134 | r |= FS_EXECABLE; | |
135 | return r; | |
cce855bc JA |
136 | } |
137 | ||
95732b49 | 138 | /* If we are the owner of the file, the owner bits apply. */ |
b80f6443 | 139 | if (current_user.euid == finfo.st_uid) |
95732b49 JA |
140 | { |
141 | if (finfo.st_mode & S_IXUSR) | |
142 | r |= FS_EXECABLE; | |
143 | if (finfo.st_mode & S_IRUSR) | |
144 | r |= FS_READABLE; | |
145 | } | |
cce855bc JA |
146 | |
147 | /* If we are in the owning group, the group permissions apply. */ | |
b80f6443 | 148 | else if (group_member (finfo.st_gid)) |
95732b49 JA |
149 | { |
150 | if (finfo.st_mode & S_IXGRP) | |
151 | r |= FS_EXECABLE; | |
152 | if (finfo.st_mode & S_IRGRP) | |
153 | r |= FS_READABLE; | |
154 | } | |
cce855bc | 155 | |
b80f6443 JA |
156 | /* Else we check whether `others' have permission to execute the file */ |
157 | else | |
95732b49 JA |
158 | { |
159 | if (finfo.st_mode & S_IXOTH) | |
160 | r |= FS_EXECABLE; | |
161 | if (finfo.st_mode & S_IROTH) | |
162 | r |= FS_READABLE; | |
163 | } | |
164 | ||
165 | return r; | |
cce855bc JA |
166 | #endif /* !AFS */ |
167 | } | |
168 | ||
169 | /* Return non-zero if FILE exists and is executable. | |
170 | Note that this function is the definition of what an | |
171 | executable file is; do not change this unless YOU know | |
172 | what an executable file is. */ | |
173 | int | |
174 | executable_file (file) | |
f73dda09 | 175 | const char *file; |
cce855bc JA |
176 | { |
177 | int s; | |
178 | ||
179 | s = file_status (file); | |
495aee44 CR |
180 | #if defined EISDIR |
181 | if (s & FS_DIRECTORY) | |
182 | errno = EISDIR; /* let's see if we can improve error messages */ | |
183 | #endif | |
cce855bc JA |
184 | return ((s & FS_EXECABLE) && ((s & FS_DIRECTORY) == 0)); |
185 | } | |
186 | ||
187 | int | |
188 | is_directory (file) | |
f73dda09 | 189 | const char *file; |
cce855bc JA |
190 | { |
191 | return (file_status (file) & FS_DIRECTORY); | |
192 | } | |
193 | ||
28ef6c31 JA |
194 | int |
195 | executable_or_directory (file) | |
f73dda09 | 196 | const char *file; |
28ef6c31 JA |
197 | { |
198 | int s; | |
199 | ||
200 | s = file_status (file); | |
201 | return ((s & FS_EXECABLE) || (s & FS_DIRECTORY)); | |
202 | } | |
203 | ||
cce855bc JA |
204 | /* Locate the executable file referenced by NAME, searching along |
205 | the contents of the shell PATH variable. Return a new string | |
206 | which is the full pathname to the file, or NULL if the file | |
207 | couldn't be found. If a file is found that isn't executable, | |
208 | and that is the only match, then return that. */ | |
209 | char * | |
210 | find_user_command (name) | |
f73dda09 | 211 | const char *name; |
cce855bc JA |
212 | { |
213 | return (find_user_command_internal (name, FS_EXEC_PREFERRED|FS_NODIRS)); | |
214 | } | |
215 | ||
216 | /* Locate the file referenced by NAME, searching along the contents | |
217 | of the shell PATH variable. Return a new string which is the full | |
218 | pathname to the file, or NULL if the file couldn't be found. This | |
95732b49 JA |
219 | returns the first readable file found; designed to be used to look |
220 | for shell scripts or files to source. */ | |
cce855bc JA |
221 | char * |
222 | find_path_file (name) | |
f73dda09 | 223 | const char *name; |
cce855bc | 224 | { |
95732b49 | 225 | return (find_user_command_internal (name, FS_READABLE)); |
cce855bc JA |
226 | } |
227 | ||
228 | static char * | |
229 | _find_user_command_internal (name, flags) | |
f73dda09 | 230 | const char *name; |
cce855bc JA |
231 | int flags; |
232 | { | |
233 | char *path_list, *cmd; | |
234 | SHELL_VAR *var; | |
235 | ||
7117c2d2 | 236 | /* Search for the value of PATH in both the temporary environments and |
cce855bc JA |
237 | in the regular list of variables. */ |
238 | if (var = find_variable_internal ("PATH", 1)) /* XXX could be array? */ | |
239 | path_list = value_cell (var); | |
240 | else | |
241 | path_list = (char *)NULL; | |
242 | ||
243 | if (path_list == 0 || *path_list == '\0') | |
244 | return (savestring (name)); | |
245 | ||
246 | cmd = find_user_command_in_path (name, path_list, flags); | |
247 | ||
cce855bc JA |
248 | return (cmd); |
249 | } | |
250 | ||
251 | static char * | |
252 | find_user_command_internal (name, flags) | |
f73dda09 | 253 | const char *name; |
cce855bc JA |
254 | int flags; |
255 | { | |
256 | #ifdef __WIN32__ | |
257 | char *res, *dotexe; | |
258 | ||
f73dda09 | 259 | dotexe = (char *)xmalloc (strlen (name) + 5); |
cce855bc JA |
260 | strcpy (dotexe, name); |
261 | strcat (dotexe, ".exe"); | |
262 | res = _find_user_command_internal (dotexe, flags); | |
263 | free (dotexe); | |
264 | if (res == 0) | |
265 | res = _find_user_command_internal (name, flags); | |
266 | return res; | |
267 | #else | |
268 | return (_find_user_command_internal (name, flags)); | |
269 | #endif | |
270 | } | |
271 | ||
272 | /* Return the next element from PATH_LIST, a colon separated list of | |
273 | paths. PATH_INDEX_POINTER is the address of an index into PATH_LIST; | |
274 | the index is modified by this function. | |
275 | Return the next element of PATH_LIST or NULL if there are no more. */ | |
276 | static char * | |
277 | get_next_path_element (path_list, path_index_pointer) | |
278 | char *path_list; | |
279 | int *path_index_pointer; | |
280 | { | |
281 | char *path; | |
282 | ||
283 | path = extract_colon_unit (path_list, path_index_pointer); | |
284 | ||
bb70624e | 285 | if (path == 0) |
cce855bc JA |
286 | return (path); |
287 | ||
bb70624e | 288 | if (*path == '\0') |
cce855bc JA |
289 | { |
290 | free (path); | |
291 | path = savestring ("."); | |
292 | } | |
293 | ||
294 | return (path); | |
295 | } | |
296 | ||
297 | /* Look for PATHNAME in $PATH. Returns either the hashed command | |
298 | corresponding to PATHNAME or the first instance of PATHNAME found | |
299 | in $PATH. Returns a newly-allocated string. */ | |
300 | char * | |
301 | search_for_command (pathname) | |
f73dda09 | 302 | const char *pathname; |
cce855bc JA |
303 | { |
304 | char *hashed_file, *command; | |
305 | int temp_path, st; | |
306 | SHELL_VAR *path; | |
307 | ||
308 | hashed_file = command = (char *)NULL; | |
309 | ||
310 | /* If PATH is in the temporary environment for this command, don't use the | |
311 | hash table to search for the full pathname. */ | |
7117c2d2 JA |
312 | path = find_variable_internal ("PATH", 1); |
313 | temp_path = path && tempvar_p (path); | |
314 | if (temp_path == 0 && path) | |
315 | path = (SHELL_VAR *)NULL; | |
cce855bc JA |
316 | |
317 | /* Don't waste time trying to find hashed data for a pathname | |
318 | that is already completely specified or if we're using a command- | |
319 | specific value for PATH. */ | |
320 | if (path == 0 && absolute_program (pathname) == 0) | |
7117c2d2 | 321 | hashed_file = phash_search (pathname); |
cce855bc JA |
322 | |
323 | /* If a command found in the hash table no longer exists, we need to | |
324 | look for it in $PATH. Thank you Posix.2. This forces us to stat | |
325 | every command found in the hash table. */ | |
326 | ||
327 | if (hashed_file && (posixly_correct || check_hashed_filenames)) | |
328 | { | |
329 | st = file_status (hashed_file); | |
f1be666c | 330 | if ((st & (FS_EXISTS|FS_EXECABLE)) != (FS_EXISTS|FS_EXECABLE)) |
cce855bc | 331 | { |
7117c2d2 | 332 | phash_remove (pathname); |
cce855bc JA |
333 | free (hashed_file); |
334 | hashed_file = (char *)NULL; | |
335 | } | |
336 | } | |
337 | ||
338 | if (hashed_file) | |
339 | command = hashed_file; | |
340 | else if (absolute_program (pathname)) | |
341 | /* A command containing a slash is not looked up in PATH or saved in | |
342 | the hash table. */ | |
343 | command = savestring (pathname); | |
344 | else | |
345 | { | |
346 | /* If $PATH is in the temporary environment, we've already retrieved | |
347 | it, so don't bother trying again. */ | |
348 | if (temp_path) | |
28ef6c31 | 349 | { |
cce855bc JA |
350 | command = find_user_command_in_path (pathname, value_cell (path), |
351 | FS_EXEC_PREFERRED|FS_NODIRS); | |
28ef6c31 | 352 | } |
cce855bc JA |
353 | else |
354 | command = find_user_command (pathname); | |
355 | if (command && hashing_enabled && temp_path == 0) | |
7117c2d2 | 356 | phash_insert ((char *)pathname, command, dot_found_in_search, 1); /* XXX fix const later */ |
cce855bc JA |
357 | } |
358 | return (command); | |
359 | } | |
360 | ||
361 | char * | |
362 | user_command_matches (name, flags, state) | |
f73dda09 | 363 | const char *name; |
cce855bc JA |
364 | int flags, state; |
365 | { | |
366 | register int i; | |
367 | int path_index, name_len; | |
368 | char *path_list, *path_element, *match; | |
369 | struct stat dotinfo; | |
370 | static char **match_list = NULL; | |
371 | static int match_list_size = 0; | |
372 | static int match_index = 0; | |
373 | ||
374 | if (state == 0) | |
375 | { | |
376 | /* Create the list of matches. */ | |
377 | if (match_list == 0) | |
378 | { | |
379 | match_list_size = 5; | |
7117c2d2 | 380 | match_list = strvec_create (match_list_size); |
cce855bc JA |
381 | } |
382 | ||
383 | /* Clear out the old match list. */ | |
384 | for (i = 0; i < match_list_size; i++) | |
385 | match_list[i] = 0; | |
386 | ||
387 | /* We haven't found any files yet. */ | |
388 | match_index = 0; | |
389 | ||
390 | if (absolute_program (name)) | |
391 | { | |
392 | match_list[0] = find_absolute_program (name, flags); | |
393 | match_list[1] = (char *)NULL; | |
394 | path_list = (char *)NULL; | |
395 | } | |
396 | else | |
397 | { | |
398 | name_len = strlen (name); | |
399 | file_to_lose_on = (char *)NULL; | |
400 | dot_found_in_search = 0; | |
401 | stat (".", &dotinfo); | |
402 | path_list = get_string_value ("PATH"); | |
403 | path_index = 0; | |
404 | } | |
405 | ||
406 | while (path_list && path_list[path_index]) | |
407 | { | |
408 | path_element = get_next_path_element (path_list, &path_index); | |
409 | ||
410 | if (path_element == 0) | |
411 | break; | |
412 | ||
413 | match = find_in_path_element (name, path_element, flags, name_len, &dotinfo); | |
414 | ||
415 | free (path_element); | |
416 | ||
417 | if (match == 0) | |
418 | continue; | |
419 | ||
420 | if (match_index + 1 == match_list_size) | |
421 | { | |
422 | match_list_size += 10; | |
7117c2d2 | 423 | match_list = strvec_resize (match_list, (match_list_size + 1)); |
cce855bc JA |
424 | } |
425 | ||
426 | match_list[match_index++] = match; | |
427 | match_list[match_index] = (char *)NULL; | |
428 | FREE (file_to_lose_on); | |
429 | file_to_lose_on = (char *)NULL; | |
430 | } | |
431 | ||
432 | /* We haven't returned any strings yet. */ | |
433 | match_index = 0; | |
434 | } | |
435 | ||
436 | match = match_list[match_index]; | |
437 | ||
438 | if (match) | |
439 | match_index++; | |
440 | ||
441 | return (match); | |
442 | } | |
443 | ||
cce855bc JA |
444 | static char * |
445 | find_absolute_program (name, flags) | |
f73dda09 | 446 | const char *name; |
cce855bc JA |
447 | int flags; |
448 | { | |
449 | int st; | |
450 | ||
451 | st = file_status (name); | |
452 | ||
453 | /* If the file doesn't exist, quit now. */ | |
454 | if ((st & FS_EXISTS) == 0) | |
455 | return ((char *)NULL); | |
456 | ||
457 | /* If we only care about whether the file exists or not, return | |
458 | this filename. Otherwise, maybe we care about whether this | |
459 | file is executable. If it is, and that is what we want, return it. */ | |
460 | if ((flags & FS_EXISTS) || ((flags & FS_EXEC_ONLY) && (st & FS_EXECABLE))) | |
461 | return (savestring (name)); | |
462 | ||
f73dda09 | 463 | return (NULL); |
cce855bc JA |
464 | } |
465 | ||
466 | static char * | |
467 | find_in_path_element (name, path, flags, name_len, dotinfop) | |
f73dda09 JA |
468 | const char *name; |
469 | char *path; | |
cce855bc JA |
470 | int flags, name_len; |
471 | struct stat *dotinfop; | |
472 | { | |
473 | int status; | |
474 | char *full_path, *xpath; | |
475 | ||
7117c2d2 | 476 | xpath = (*path == '~') ? bash_tilde_expand (path, 0) : path; |
cce855bc JA |
477 | |
478 | /* Remember the location of "." in the path, in all its forms | |
479 | (as long as they begin with a `.', e.g. `./.') */ | |
480 | if (dot_found_in_search == 0 && *xpath == '.') | |
481 | dot_found_in_search = same_file (".", xpath, dotinfop, (struct stat *)NULL); | |
482 | ||
bb70624e | 483 | full_path = sh_makepath (xpath, name, 0); |
cce855bc JA |
484 | |
485 | status = file_status (full_path); | |
486 | ||
487 | if (xpath != path) | |
488 | free (xpath); | |
489 | ||
490 | if ((status & FS_EXISTS) == 0) | |
491 | { | |
492 | free (full_path); | |
493 | return ((char *)NULL); | |
494 | } | |
495 | ||
496 | /* The file exists. If the caller simply wants the first file, here it is. */ | |
497 | if (flags & FS_EXISTS) | |
498 | return (full_path); | |
499 | ||
95732b49 JA |
500 | /* If we have a readable file, and the caller wants a readable file, this |
501 | is it. */ | |
502 | if ((flags & FS_READABLE) && (status & FS_READABLE)) | |
503 | return (full_path); | |
504 | ||
cce855bc JA |
505 | /* If the file is executable, then it satisfies the cases of |
506 | EXEC_ONLY and EXEC_PREFERRED. Return this file unconditionally. */ | |
95732b49 | 507 | if ((status & FS_EXECABLE) && (flags & (FS_EXEC_ONLY|FS_EXEC_PREFERRED)) && |
cce855bc JA |
508 | (((flags & FS_NODIRS) == 0) || ((status & FS_DIRECTORY) == 0))) |
509 | { | |
510 | FREE (file_to_lose_on); | |
511 | file_to_lose_on = (char *)NULL; | |
512 | return (full_path); | |
513 | } | |
514 | ||
515 | /* The file is not executable, but it does exist. If we prefer | |
516 | an executable, then remember this one if it is the first one | |
517 | we have found. */ | |
518 | if ((flags & FS_EXEC_PREFERRED) && file_to_lose_on == 0) | |
519 | file_to_lose_on = savestring (full_path); | |
520 | ||
521 | /* If we want only executable files, or we don't want directories and | |
95732b49 JA |
522 | this file is a directory, or we want a readable file and this file |
523 | isn't readable, fail. */ | |
524 | if ((flags & (FS_EXEC_ONLY|FS_EXEC_PREFERRED)) || | |
525 | ((flags & FS_NODIRS) && (status & FS_DIRECTORY)) || | |
526 | ((flags & FS_READABLE) && (status & FS_READABLE) == 0)) | |
cce855bc JA |
527 | { |
528 | free (full_path); | |
529 | return ((char *)NULL); | |
530 | } | |
531 | else | |
532 | return (full_path); | |
533 | } | |
534 | ||
535 | /* This does the dirty work for find_user_command_internal () and | |
536 | user_command_matches (). | |
537 | NAME is the name of the file to search for. | |
538 | PATH_LIST is a colon separated list of directories to search. | |
539 | FLAGS contains bit fields which control the files which are eligible. | |
540 | Some values are: | |
541 | FS_EXEC_ONLY: The file must be an executable to be found. | |
542 | FS_EXEC_PREFERRED: If we can't find an executable, then the | |
543 | the first file matching NAME will do. | |
544 | FS_EXISTS: The first file found will do. | |
545 | FS_NODIRS: Don't find any directories. | |
546 | */ | |
547 | static char * | |
548 | find_user_command_in_path (name, path_list, flags) | |
f73dda09 | 549 | const char *name; |
cce855bc JA |
550 | char *path_list; |
551 | int flags; | |
552 | { | |
553 | char *full_path, *path; | |
554 | int path_index, name_len; | |
555 | struct stat dotinfo; | |
556 | ||
557 | /* We haven't started looking, so we certainly haven't seen | |
558 | a `.' as the directory path yet. */ | |
559 | dot_found_in_search = 0; | |
560 | ||
561 | if (absolute_program (name)) | |
562 | { | |
563 | full_path = find_absolute_program (name, flags); | |
564 | return (full_path); | |
565 | } | |
566 | ||
567 | if (path_list == 0 || *path_list == '\0') | |
568 | return (savestring (name)); /* XXX */ | |
569 | ||
570 | file_to_lose_on = (char *)NULL; | |
571 | name_len = strlen (name); | |
572 | stat (".", &dotinfo); | |
573 | path_index = 0; | |
574 | ||
575 | while (path_list[path_index]) | |
576 | { | |
577 | /* Allow the user to interrupt out of a lengthy path search. */ | |
578 | QUIT; | |
579 | ||
580 | path = get_next_path_element (path_list, &path_index); | |
581 | if (path == 0) | |
582 | break; | |
583 | ||
584 | /* Side effects: sets dot_found_in_search, possibly sets | |
585 | file_to_lose_on. */ | |
586 | full_path = find_in_path_element (name, path, flags, name_len, &dotinfo); | |
587 | free (path); | |
588 | ||
589 | /* This should really be in find_in_path_element, but there isn't the | |
590 | right combination of flags. */ | |
591 | if (full_path && is_directory (full_path)) | |
592 | { | |
593 | free (full_path); | |
594 | continue; | |
595 | } | |
596 | ||
597 | if (full_path) | |
598 | { | |
599 | FREE (file_to_lose_on); | |
600 | return (full_path); | |
601 | } | |
602 | } | |
603 | ||
604 | /* We didn't find exactly what the user was looking for. Return | |
605 | the contents of FILE_TO_LOSE_ON which is NULL when the search | |
606 | required an executable, or non-NULL if a file was found and the | |
28ef6c31 JA |
607 | search would accept a non-executable as a last resort. If the |
608 | caller specified FS_NODIRS, and file_to_lose_on is a directory, | |
609 | return NULL. */ | |
610 | if (file_to_lose_on && (flags & FS_NODIRS) && is_directory (file_to_lose_on)) | |
611 | { | |
612 | free (file_to_lose_on); | |
613 | file_to_lose_on = (char *)NULL; | |
614 | } | |
615 | ||
cce855bc JA |
616 | return (file_to_lose_on); |
617 | } |