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cce855bc JA |
1 | /* findcmd.c -- Functions to search for commands by name. */ |
2 | ||
ac50fbac | 3 | /* Copyright (C) 1997-2012 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 | 51 | extern int posixly_correct; |
ac50fbac | 52 | extern int last_command_exit_value; |
cce855bc JA |
53 | |
54 | /* Static functions defined and used in this file. */ | |
f73dda09 JA |
55 | static char *_find_user_command_internal __P((const char *, int)); |
56 | static char *find_user_command_internal __P((const char *, int)); | |
57 | static char *find_user_command_in_path __P((const char *, char *, int)); | |
58 | static char *find_in_path_element __P((const char *, char *, int, int, struct stat *)); | |
59 | static char *find_absolute_program __P((const char *, int)); | |
60 | ||
61 | static char *get_next_path_element __P((char *, int *)); | |
cce855bc JA |
62 | |
63 | /* The file name which we would try to execute, except that it isn't | |
64 | possible to execute it. This is the first file that matches the | |
65 | name that we are looking for while we are searching $PATH for a | |
66 | suitable one to execute. If we cannot find a suitable executable | |
67 | file, then we use this one. */ | |
68 | static char *file_to_lose_on; | |
69 | ||
70 | /* Non-zero if we should stat every command found in the hash table to | |
71 | make sure it still exists. */ | |
72 | int check_hashed_filenames; | |
73 | ||
74 | /* DOT_FOUND_IN_SEARCH becomes non-zero when find_user_command () | |
75 | encounters a `.' as the directory pathname while scanning the | |
76 | list of possible pathnames; i.e., if `.' comes before the directory | |
77 | containing the file of interest. */ | |
78 | int dot_found_in_search = 0; | |
79 | ||
cce855bc JA |
80 | /* Return some flags based on information about this file. |
81 | The EXISTS bit is non-zero if the file is found. | |
82 | The EXECABLE bit is non-zero the file is executble. | |
83 | Zero is returned if the file is not found. */ | |
84 | int | |
85 | file_status (name) | |
f73dda09 | 86 | const char *name; |
cce855bc JA |
87 | { |
88 | struct stat finfo; | |
95732b49 | 89 | int r; |
cce855bc JA |
90 | |
91 | /* Determine whether this file exists or not. */ | |
92 | if (stat (name, &finfo) < 0) | |
93 | return (0); | |
94 | ||
95 | /* If the file is a directory, then it is not "executable" in the | |
96 | sense of the shell. */ | |
97 | if (S_ISDIR (finfo.st_mode)) | |
98 | return (FS_EXISTS|FS_DIRECTORY); | |
99 | ||
95732b49 JA |
100 | r = FS_EXISTS; |
101 | ||
0001803f CR |
102 | #if defined (HAVE_EACCESS) |
103 | /* Use eaccess(2) if we have it to take things like ACLs and other | |
104 | file access mechanisms into account. eaccess uses the effective | |
105 | user and group IDs, not the real ones. We could use sh_eaccess, | |
106 | but we don't want any special treatment for /dev/fd. */ | |
107 | if (eaccess (name, X_OK) == 0) | |
108 | r |= FS_EXECABLE; | |
109 | if (eaccess (name, R_OK) == 0) | |
110 | r |= FS_READABLE; | |
111 | ||
112 | return r; | |
113 | #elif defined (AFS) | |
cce855bc JA |
114 | /* We have to use access(2) to determine access because AFS does not |
115 | support Unix file system semantics. This may produce wrong | |
116 | answers for non-AFS files when ruid != euid. I hate AFS. */ | |
95732b49 JA |
117 | if (access (name, X_OK) == 0) |
118 | r |= FS_EXECABLE; | |
119 | if (access (name, R_OK) == 0) | |
120 | r |= FS_READABLE; | |
121 | ||
122 | return r; | |
0001803f | 123 | #else /* !HAVE_EACCESS && !AFS */ |
cce855bc JA |
124 | |
125 | /* Find out if the file is actually executable. By definition, the | |
126 | only other criteria is that the file has an execute bit set that | |
95732b49 | 127 | we can use. The same with whether or not a file is readable. */ |
cce855bc JA |
128 | |
129 | /* Root only requires execute permission for any of owner, group or | |
95732b49 | 130 | others to be able to exec a file, and can read any file. */ |
cce855bc JA |
131 | if (current_user.euid == (uid_t)0) |
132 | { | |
95732b49 JA |
133 | r |= FS_READABLE; |
134 | if (finfo.st_mode & S_IXUGO) | |
135 | r |= FS_EXECABLE; | |
136 | return r; | |
cce855bc JA |
137 | } |
138 | ||
95732b49 | 139 | /* If we are the owner of the file, the owner bits apply. */ |
b80f6443 | 140 | if (current_user.euid == finfo.st_uid) |
95732b49 JA |
141 | { |
142 | if (finfo.st_mode & S_IXUSR) | |
143 | r |= FS_EXECABLE; | |
144 | if (finfo.st_mode & S_IRUSR) | |
145 | r |= FS_READABLE; | |
146 | } | |
cce855bc JA |
147 | |
148 | /* If we are in the owning group, the group permissions apply. */ | |
b80f6443 | 149 | else if (group_member (finfo.st_gid)) |
95732b49 JA |
150 | { |
151 | if (finfo.st_mode & S_IXGRP) | |
152 | r |= FS_EXECABLE; | |
153 | if (finfo.st_mode & S_IRGRP) | |
154 | r |= FS_READABLE; | |
155 | } | |
cce855bc | 156 | |
b80f6443 JA |
157 | /* Else we check whether `others' have permission to execute the file */ |
158 | else | |
95732b49 JA |
159 | { |
160 | if (finfo.st_mode & S_IXOTH) | |
161 | r |= FS_EXECABLE; | |
162 | if (finfo.st_mode & S_IROTH) | |
163 | r |= FS_READABLE; | |
164 | } | |
165 | ||
166 | return r; | |
cce855bc JA |
167 | #endif /* !AFS */ |
168 | } | |
169 | ||
170 | /* Return non-zero if FILE exists and is executable. | |
171 | Note that this function is the definition of what an | |
172 | executable file is; do not change this unless YOU know | |
173 | what an executable file is. */ | |
174 | int | |
175 | executable_file (file) | |
f73dda09 | 176 | const char *file; |
cce855bc JA |
177 | { |
178 | int s; | |
179 | ||
180 | s = file_status (file); | |
495aee44 CR |
181 | #if defined EISDIR |
182 | if (s & FS_DIRECTORY) | |
183 | errno = EISDIR; /* let's see if we can improve error messages */ | |
184 | #endif | |
cce855bc JA |
185 | return ((s & FS_EXECABLE) && ((s & FS_DIRECTORY) == 0)); |
186 | } | |
187 | ||
188 | int | |
189 | is_directory (file) | |
f73dda09 | 190 | const char *file; |
cce855bc JA |
191 | { |
192 | return (file_status (file) & FS_DIRECTORY); | |
193 | } | |
194 | ||
28ef6c31 JA |
195 | int |
196 | executable_or_directory (file) | |
f73dda09 | 197 | const char *file; |
28ef6c31 JA |
198 | { |
199 | int s; | |
200 | ||
201 | s = file_status (file); | |
202 | return ((s & FS_EXECABLE) || (s & FS_DIRECTORY)); | |
203 | } | |
204 | ||
cce855bc JA |
205 | /* Locate the executable file referenced by NAME, searching along |
206 | the contents of the shell PATH variable. Return a new string | |
207 | which is the full pathname to the file, or NULL if the file | |
208 | couldn't be found. If a file is found that isn't executable, | |
209 | and that is the only match, then return that. */ | |
210 | char * | |
211 | find_user_command (name) | |
f73dda09 | 212 | const char *name; |
cce855bc JA |
213 | { |
214 | return (find_user_command_internal (name, FS_EXEC_PREFERRED|FS_NODIRS)); | |
215 | } | |
216 | ||
217 | /* Locate the file referenced by NAME, searching along the contents | |
218 | of the shell PATH variable. Return a new string which is the full | |
219 | pathname to the file, or NULL if the file couldn't be found. This | |
95732b49 JA |
220 | returns the first readable file found; designed to be used to look |
221 | for shell scripts or files to source. */ | |
cce855bc JA |
222 | char * |
223 | find_path_file (name) | |
f73dda09 | 224 | const char *name; |
cce855bc | 225 | { |
95732b49 | 226 | return (find_user_command_internal (name, FS_READABLE)); |
cce855bc JA |
227 | } |
228 | ||
229 | static char * | |
230 | _find_user_command_internal (name, flags) | |
f73dda09 | 231 | const char *name; |
cce855bc JA |
232 | int flags; |
233 | { | |
234 | char *path_list, *cmd; | |
235 | SHELL_VAR *var; | |
236 | ||
7117c2d2 | 237 | /* Search for the value of PATH in both the temporary environments and |
cce855bc | 238 | in the regular list of variables. */ |
ac50fbac | 239 | if (var = find_variable_tempenv ("PATH")) /* XXX could be array? */ |
cce855bc JA |
240 | path_list = value_cell (var); |
241 | else | |
242 | path_list = (char *)NULL; | |
243 | ||
244 | if (path_list == 0 || *path_list == '\0') | |
245 | return (savestring (name)); | |
246 | ||
247 | cmd = find_user_command_in_path (name, path_list, flags); | |
248 | ||
cce855bc JA |
249 | return (cmd); |
250 | } | |
251 | ||
252 | static char * | |
253 | find_user_command_internal (name, flags) | |
f73dda09 | 254 | const char *name; |
cce855bc JA |
255 | int flags; |
256 | { | |
257 | #ifdef __WIN32__ | |
258 | char *res, *dotexe; | |
259 | ||
f73dda09 | 260 | dotexe = (char *)xmalloc (strlen (name) + 5); |
cce855bc JA |
261 | strcpy (dotexe, name); |
262 | strcat (dotexe, ".exe"); | |
263 | res = _find_user_command_internal (dotexe, flags); | |
264 | free (dotexe); | |
265 | if (res == 0) | |
266 | res = _find_user_command_internal (name, flags); | |
267 | return res; | |
268 | #else | |
269 | return (_find_user_command_internal (name, flags)); | |
270 | #endif | |
271 | } | |
272 | ||
273 | /* Return the next element from PATH_LIST, a colon separated list of | |
274 | paths. PATH_INDEX_POINTER is the address of an index into PATH_LIST; | |
275 | the index is modified by this function. | |
276 | Return the next element of PATH_LIST or NULL if there are no more. */ | |
277 | static char * | |
278 | get_next_path_element (path_list, path_index_pointer) | |
279 | char *path_list; | |
280 | int *path_index_pointer; | |
281 | { | |
282 | char *path; | |
283 | ||
284 | path = extract_colon_unit (path_list, path_index_pointer); | |
285 | ||
bb70624e | 286 | if (path == 0) |
cce855bc JA |
287 | return (path); |
288 | ||
bb70624e | 289 | if (*path == '\0') |
cce855bc JA |
290 | { |
291 | free (path); | |
292 | path = savestring ("."); | |
293 | } | |
294 | ||
295 | return (path); | |
296 | } | |
297 | ||
298 | /* Look for PATHNAME in $PATH. Returns either the hashed command | |
299 | corresponding to PATHNAME or the first instance of PATHNAME found | |
ac50fbac CR |
300 | in $PATH. If (FLAGS&1) is non-zero, insert the instance of PATHNAME |
301 | found in $PATH into the command hash table. Returns a newly-allocated | |
302 | string. */ | |
cce855bc | 303 | char * |
ac50fbac | 304 | search_for_command (pathname, flags) |
f73dda09 | 305 | const char *pathname; |
ac50fbac | 306 | int flags; |
cce855bc JA |
307 | { |
308 | char *hashed_file, *command; | |
309 | int temp_path, st; | |
310 | SHELL_VAR *path; | |
311 | ||
312 | hashed_file = command = (char *)NULL; | |
313 | ||
314 | /* If PATH is in the temporary environment for this command, don't use the | |
315 | hash table to search for the full pathname. */ | |
ac50fbac | 316 | path = find_variable_tempenv ("PATH"); |
7117c2d2 JA |
317 | temp_path = path && tempvar_p (path); |
318 | if (temp_path == 0 && path) | |
319 | path = (SHELL_VAR *)NULL; | |
cce855bc JA |
320 | |
321 | /* Don't waste time trying to find hashed data for a pathname | |
322 | that is already completely specified or if we're using a command- | |
323 | specific value for PATH. */ | |
324 | if (path == 0 && absolute_program (pathname) == 0) | |
7117c2d2 | 325 | hashed_file = phash_search (pathname); |
cce855bc JA |
326 | |
327 | /* If a command found in the hash table no longer exists, we need to | |
328 | look for it in $PATH. Thank you Posix.2. This forces us to stat | |
329 | every command found in the hash table. */ | |
330 | ||
331 | if (hashed_file && (posixly_correct || check_hashed_filenames)) | |
332 | { | |
333 | st = file_status (hashed_file); | |
f1be666c | 334 | if ((st & (FS_EXISTS|FS_EXECABLE)) != (FS_EXISTS|FS_EXECABLE)) |
cce855bc | 335 | { |
7117c2d2 | 336 | phash_remove (pathname); |
cce855bc JA |
337 | free (hashed_file); |
338 | hashed_file = (char *)NULL; | |
339 | } | |
340 | } | |
341 | ||
342 | if (hashed_file) | |
343 | command = hashed_file; | |
344 | else if (absolute_program (pathname)) | |
345 | /* A command containing a slash is not looked up in PATH or saved in | |
346 | the hash table. */ | |
347 | command = savestring (pathname); | |
348 | else | |
349 | { | |
350 | /* If $PATH is in the temporary environment, we've already retrieved | |
351 | it, so don't bother trying again. */ | |
352 | if (temp_path) | |
28ef6c31 | 353 | { |
cce855bc JA |
354 | command = find_user_command_in_path (pathname, value_cell (path), |
355 | FS_EXEC_PREFERRED|FS_NODIRS); | |
28ef6c31 | 356 | } |
cce855bc JA |
357 | else |
358 | command = find_user_command (pathname); | |
ac50fbac | 359 | if (command && hashing_enabled && temp_path == 0 && (flags & 1)) |
7117c2d2 | 360 | phash_insert ((char *)pathname, command, dot_found_in_search, 1); /* XXX fix const later */ |
cce855bc JA |
361 | } |
362 | return (command); | |
363 | } | |
364 | ||
365 | char * | |
366 | user_command_matches (name, flags, state) | |
f73dda09 | 367 | const char *name; |
cce855bc JA |
368 | int flags, state; |
369 | { | |
370 | register int i; | |
371 | int path_index, name_len; | |
372 | char *path_list, *path_element, *match; | |
373 | struct stat dotinfo; | |
374 | static char **match_list = NULL; | |
375 | static int match_list_size = 0; | |
376 | static int match_index = 0; | |
377 | ||
378 | if (state == 0) | |
379 | { | |
380 | /* Create the list of matches. */ | |
381 | if (match_list == 0) | |
382 | { | |
383 | match_list_size = 5; | |
7117c2d2 | 384 | match_list = strvec_create (match_list_size); |
cce855bc JA |
385 | } |
386 | ||
387 | /* Clear out the old match list. */ | |
388 | for (i = 0; i < match_list_size; i++) | |
389 | match_list[i] = 0; | |
390 | ||
391 | /* We haven't found any files yet. */ | |
392 | match_index = 0; | |
393 | ||
394 | if (absolute_program (name)) | |
395 | { | |
396 | match_list[0] = find_absolute_program (name, flags); | |
397 | match_list[1] = (char *)NULL; | |
398 | path_list = (char *)NULL; | |
399 | } | |
400 | else | |
401 | { | |
402 | name_len = strlen (name); | |
403 | file_to_lose_on = (char *)NULL; | |
404 | dot_found_in_search = 0; | |
ac50fbac CR |
405 | if (stat (".", &dotinfo) < 0) |
406 | dotinfo.st_dev = dotinfo.st_ino = 0; /* so same_file won't match */ | |
cce855bc JA |
407 | path_list = get_string_value ("PATH"); |
408 | path_index = 0; | |
409 | } | |
410 | ||
411 | while (path_list && path_list[path_index]) | |
412 | { | |
413 | path_element = get_next_path_element (path_list, &path_index); | |
414 | ||
415 | if (path_element == 0) | |
416 | break; | |
417 | ||
418 | match = find_in_path_element (name, path_element, flags, name_len, &dotinfo); | |
419 | ||
420 | free (path_element); | |
421 | ||
422 | if (match == 0) | |
423 | continue; | |
424 | ||
425 | if (match_index + 1 == match_list_size) | |
426 | { | |
427 | match_list_size += 10; | |
7117c2d2 | 428 | match_list = strvec_resize (match_list, (match_list_size + 1)); |
cce855bc JA |
429 | } |
430 | ||
431 | match_list[match_index++] = match; | |
432 | match_list[match_index] = (char *)NULL; | |
433 | FREE (file_to_lose_on); | |
434 | file_to_lose_on = (char *)NULL; | |
435 | } | |
436 | ||
437 | /* We haven't returned any strings yet. */ | |
438 | match_index = 0; | |
439 | } | |
440 | ||
441 | match = match_list[match_index]; | |
442 | ||
443 | if (match) | |
444 | match_index++; | |
445 | ||
446 | return (match); | |
447 | } | |
448 | ||
cce855bc JA |
449 | static char * |
450 | find_absolute_program (name, flags) | |
f73dda09 | 451 | const char *name; |
cce855bc JA |
452 | int flags; |
453 | { | |
454 | int st; | |
455 | ||
456 | st = file_status (name); | |
457 | ||
458 | /* If the file doesn't exist, quit now. */ | |
459 | if ((st & FS_EXISTS) == 0) | |
460 | return ((char *)NULL); | |
461 | ||
462 | /* If we only care about whether the file exists or not, return | |
463 | this filename. Otherwise, maybe we care about whether this | |
464 | file is executable. If it is, and that is what we want, return it. */ | |
465 | if ((flags & FS_EXISTS) || ((flags & FS_EXEC_ONLY) && (st & FS_EXECABLE))) | |
466 | return (savestring (name)); | |
467 | ||
f73dda09 | 468 | return (NULL); |
cce855bc JA |
469 | } |
470 | ||
471 | static char * | |
472 | find_in_path_element (name, path, flags, name_len, dotinfop) | |
f73dda09 JA |
473 | const char *name; |
474 | char *path; | |
cce855bc JA |
475 | int flags, name_len; |
476 | struct stat *dotinfop; | |
477 | { | |
478 | int status; | |
479 | char *full_path, *xpath; | |
480 | ||
7117c2d2 | 481 | xpath = (*path == '~') ? bash_tilde_expand (path, 0) : path; |
cce855bc JA |
482 | |
483 | /* Remember the location of "." in the path, in all its forms | |
484 | (as long as they begin with a `.', e.g. `./.') */ | |
485 | if (dot_found_in_search == 0 && *xpath == '.') | |
486 | dot_found_in_search = same_file (".", xpath, dotinfop, (struct stat *)NULL); | |
487 | ||
bb70624e | 488 | full_path = sh_makepath (xpath, name, 0); |
cce855bc JA |
489 | |
490 | status = file_status (full_path); | |
491 | ||
492 | if (xpath != path) | |
493 | free (xpath); | |
494 | ||
495 | if ((status & FS_EXISTS) == 0) | |
496 | { | |
497 | free (full_path); | |
498 | return ((char *)NULL); | |
499 | } | |
500 | ||
501 | /* The file exists. If the caller simply wants the first file, here it is. */ | |
502 | if (flags & FS_EXISTS) | |
503 | return (full_path); | |
504 | ||
95732b49 JA |
505 | /* If we have a readable file, and the caller wants a readable file, this |
506 | is it. */ | |
507 | if ((flags & FS_READABLE) && (status & FS_READABLE)) | |
508 | return (full_path); | |
509 | ||
cce855bc JA |
510 | /* If the file is executable, then it satisfies the cases of |
511 | EXEC_ONLY and EXEC_PREFERRED. Return this file unconditionally. */ | |
95732b49 | 512 | if ((status & FS_EXECABLE) && (flags & (FS_EXEC_ONLY|FS_EXEC_PREFERRED)) && |
cce855bc JA |
513 | (((flags & FS_NODIRS) == 0) || ((status & FS_DIRECTORY) == 0))) |
514 | { | |
515 | FREE (file_to_lose_on); | |
516 | file_to_lose_on = (char *)NULL; | |
517 | return (full_path); | |
518 | } | |
519 | ||
520 | /* The file is not executable, but it does exist. If we prefer | |
521 | an executable, then remember this one if it is the first one | |
522 | we have found. */ | |
523 | if ((flags & FS_EXEC_PREFERRED) && file_to_lose_on == 0) | |
524 | file_to_lose_on = savestring (full_path); | |
525 | ||
526 | /* If we want only executable files, or we don't want directories and | |
95732b49 JA |
527 | this file is a directory, or we want a readable file and this file |
528 | isn't readable, fail. */ | |
529 | if ((flags & (FS_EXEC_ONLY|FS_EXEC_PREFERRED)) || | |
530 | ((flags & FS_NODIRS) && (status & FS_DIRECTORY)) || | |
531 | ((flags & FS_READABLE) && (status & FS_READABLE) == 0)) | |
cce855bc JA |
532 | { |
533 | free (full_path); | |
534 | return ((char *)NULL); | |
535 | } | |
536 | else | |
537 | return (full_path); | |
538 | } | |
539 | ||
540 | /* This does the dirty work for find_user_command_internal () and | |
541 | user_command_matches (). | |
542 | NAME is the name of the file to search for. | |
543 | PATH_LIST is a colon separated list of directories to search. | |
544 | FLAGS contains bit fields which control the files which are eligible. | |
545 | Some values are: | |
546 | FS_EXEC_ONLY: The file must be an executable to be found. | |
547 | FS_EXEC_PREFERRED: If we can't find an executable, then the | |
548 | the first file matching NAME will do. | |
549 | FS_EXISTS: The first file found will do. | |
550 | FS_NODIRS: Don't find any directories. | |
551 | */ | |
552 | static char * | |
553 | find_user_command_in_path (name, path_list, flags) | |
f73dda09 | 554 | const char *name; |
cce855bc JA |
555 | char *path_list; |
556 | int flags; | |
557 | { | |
558 | char *full_path, *path; | |
559 | int path_index, name_len; | |
560 | struct stat dotinfo; | |
561 | ||
562 | /* We haven't started looking, so we certainly haven't seen | |
563 | a `.' as the directory path yet. */ | |
564 | dot_found_in_search = 0; | |
565 | ||
566 | if (absolute_program (name)) | |
567 | { | |
568 | full_path = find_absolute_program (name, flags); | |
569 | return (full_path); | |
570 | } | |
571 | ||
572 | if (path_list == 0 || *path_list == '\0') | |
573 | return (savestring (name)); /* XXX */ | |
574 | ||
575 | file_to_lose_on = (char *)NULL; | |
576 | name_len = strlen (name); | |
ac50fbac CR |
577 | if (stat (".", &dotinfo) < 0) |
578 | dotinfo.st_dev = dotinfo.st_ino = 0; | |
cce855bc JA |
579 | path_index = 0; |
580 | ||
581 | while (path_list[path_index]) | |
582 | { | |
583 | /* Allow the user to interrupt out of a lengthy path search. */ | |
584 | QUIT; | |
585 | ||
586 | path = get_next_path_element (path_list, &path_index); | |
587 | if (path == 0) | |
588 | break; | |
589 | ||
590 | /* Side effects: sets dot_found_in_search, possibly sets | |
591 | file_to_lose_on. */ | |
592 | full_path = find_in_path_element (name, path, flags, name_len, &dotinfo); | |
593 | free (path); | |
594 | ||
595 | /* This should really be in find_in_path_element, but there isn't the | |
596 | right combination of flags. */ | |
597 | if (full_path && is_directory (full_path)) | |
598 | { | |
599 | free (full_path); | |
600 | continue; | |
601 | } | |
602 | ||
603 | if (full_path) | |
604 | { | |
605 | FREE (file_to_lose_on); | |
606 | return (full_path); | |
607 | } | |
608 | } | |
609 | ||
610 | /* We didn't find exactly what the user was looking for. Return | |
611 | the contents of FILE_TO_LOSE_ON which is NULL when the search | |
612 | required an executable, or non-NULL if a file was found and the | |
28ef6c31 JA |
613 | search would accept a non-executable as a last resort. If the |
614 | caller specified FS_NODIRS, and file_to_lose_on is a directory, | |
615 | return NULL. */ | |
616 | if (file_to_lose_on && (flags & FS_NODIRS) && is_directory (file_to_lose_on)) | |
617 | { | |
618 | free (file_to_lose_on); | |
619 | file_to_lose_on = (char *)NULL; | |
620 | } | |
621 | ||
cce855bc JA |
622 | return (file_to_lose_on); |
623 | } |