Commit | Line | Data |
---|---|---|
81b86775 DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
66495845 | 3 | * Copyright (C) 2013 - Raphaël Beamonte <raphael.beamonte@gmail.com> |
8db0dc00 | 4 | * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
81b86775 DG |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License, version 2 only, as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along with | |
16 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
17 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | */ | |
19 | ||
20 | #define _GNU_SOURCE | |
6c1c0768 | 21 | #define _LGPL_SOURCE |
35f90c40 | 22 | #include <assert.h> |
81b86775 DG |
23 | #include <ctype.h> |
24 | #include <fcntl.h> | |
25 | #include <limits.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
2d851108 | 28 | #include <sys/stat.h> |
0c7bcad5 | 29 | #include <sys/types.h> |
2d851108 | 30 | #include <unistd.h> |
fe4477ee | 31 | #include <inttypes.h> |
6c71277b | 32 | #include <grp.h> |
fb198a11 | 33 | #include <pwd.h> |
c9cb3e7d | 34 | #include <sys/file.h> |
3d071855 | 35 | #include <dirent.h> |
81b86775 DG |
36 | |
37 | #include <common/common.h> | |
fe4477ee | 38 | #include <common/runas.h> |
e8fa9fb0 | 39 | #include <common/compat/getenv.h> |
81b86775 DG |
40 | |
41 | #include "utils.h" | |
feb0f3e5 | 42 | #include "defaults.h" |
81b86775 | 43 | |
5154230f RB |
44 | /* |
45 | * Return a partial realpath(3) of the path even if the full path does not | |
46 | * exist. For instance, with /tmp/test1/test2/test3, if test2/ does not exist | |
47 | * but the /tmp/test1 does, the real path for /tmp/test1 is concatened with | |
48 | * /test2/test3 then returned. In normal time, realpath(3) fails if the end | |
49 | * point directory does not exist. | |
50 | * In case resolved_path is NULL, the string returned was allocated in the | |
51 | * function and thus need to be freed by the caller. The size argument allows | |
52 | * to specify the size of the resolved_path argument if given, or the size to | |
53 | * allocate. | |
54 | */ | |
55 | LTTNG_HIDDEN | |
56 | char *utils_partial_realpath(const char *path, char *resolved_path, size_t size) | |
57 | { | |
9482daac | 58 | char *cut_path = NULL, *try_path = NULL, *try_path_prev = NULL; |
5154230f RB |
59 | const char *next, *prev, *end; |
60 | ||
61 | /* Safety net */ | |
62 | if (path == NULL) { | |
63 | goto error; | |
64 | } | |
65 | ||
66 | /* | |
67 | * Identify the end of the path, we don't want to treat the | |
68 | * last char if it is a '/', we will just keep it on the side | |
69 | * to be added at the end, and return a value coherent with | |
70 | * the path given as argument | |
71 | */ | |
72 | end = path + strlen(path); | |
73 | if (*(end-1) == '/') { | |
74 | end--; | |
75 | } | |
76 | ||
77 | /* Initiate the values of the pointers before looping */ | |
78 | next = path; | |
79 | prev = next; | |
80 | /* Only to ensure try_path is not NULL to enter the while */ | |
81 | try_path = (char *)next; | |
82 | ||
83 | /* Resolve the canonical path of the first part of the path */ | |
84 | while (try_path != NULL && next != end) { | |
85 | /* | |
86 | * If there is not any '/' left, we want to try with | |
87 | * the full path | |
88 | */ | |
89 | next = strpbrk(next + 1, "/"); | |
90 | if (next == NULL) { | |
91 | next = end; | |
92 | } | |
93 | ||
94 | /* Cut the part we will be trying to resolve */ | |
95 | cut_path = strndup(path, next - path); | |
d9dbcf5e MD |
96 | if (cut_path == NULL) { |
97 | PERROR("strndup"); | |
98 | goto error; | |
99 | } | |
5154230f RB |
100 | |
101 | /* Try to resolve this part */ | |
102 | try_path = realpath((char *)cut_path, NULL); | |
103 | if (try_path == NULL) { | |
104 | /* | |
105 | * There was an error, we just want to be assured it | |
106 | * is linked to an unexistent directory, if it's another | |
107 | * reason, we spawn an error | |
108 | */ | |
109 | switch (errno) { | |
110 | case ENOENT: | |
111 | /* Ignore the error */ | |
112 | break; | |
113 | default: | |
114 | PERROR("realpath (partial_realpath)"); | |
115 | goto error; | |
116 | break; | |
117 | } | |
118 | } else { | |
119 | /* Save the place we are before trying the next step */ | |
120 | free(try_path_prev); | |
121 | try_path_prev = try_path; | |
122 | prev = next; | |
123 | } | |
124 | ||
125 | /* Free the allocated memory */ | |
126 | free(cut_path); | |
c14cc491 | 127 | cut_path = NULL; |
494a8e99 | 128 | } |
5154230f RB |
129 | |
130 | /* Allocate memory for the resolved path if necessary */ | |
131 | if (resolved_path == NULL) { | |
132 | resolved_path = zmalloc(size); | |
133 | if (resolved_path == NULL) { | |
134 | PERROR("zmalloc resolved path"); | |
135 | goto error; | |
136 | } | |
137 | } | |
138 | ||
139 | /* | |
140 | * If we were able to solve at least partially the path, we can concatenate | |
141 | * what worked and what didn't work | |
142 | */ | |
143 | if (try_path_prev != NULL) { | |
144 | /* If we risk to concatenate two '/', we remove one of them */ | |
145 | if (try_path_prev[strlen(try_path_prev) - 1] == '/' && prev[0] == '/') { | |
146 | try_path_prev[strlen(try_path_prev) - 1] = '\0'; | |
147 | } | |
148 | ||
149 | /* | |
150 | * Duplicate the memory used by prev in case resolved_path and | |
151 | * path are pointers for the same memory space | |
152 | */ | |
153 | cut_path = strdup(prev); | |
d9dbcf5e MD |
154 | if (cut_path == NULL) { |
155 | PERROR("strdup"); | |
156 | goto error; | |
157 | } | |
5154230f RB |
158 | |
159 | /* Concatenate the strings */ | |
160 | snprintf(resolved_path, size, "%s%s", try_path_prev, cut_path); | |
161 | ||
162 | /* Free the allocated memory */ | |
163 | free(cut_path); | |
164 | free(try_path_prev); | |
494a8e99 JG |
165 | cut_path = NULL; |
166 | try_path_prev = NULL; | |
5154230f RB |
167 | /* |
168 | * Else, we just copy the path in our resolved_path to | |
169 | * return it as is | |
170 | */ | |
171 | } else { | |
172 | strncpy(resolved_path, path, size); | |
173 | } | |
174 | ||
175 | /* Then we return the 'partially' resolved path */ | |
176 | return resolved_path; | |
177 | ||
178 | error: | |
179 | free(resolved_path); | |
9482daac | 180 | free(cut_path); |
5154230f RB |
181 | return NULL; |
182 | } | |
183 | ||
81b86775 | 184 | /* |
3d229795 RB |
185 | * Make a full resolution of the given path even if it doesn't exist. |
186 | * This function uses the utils_partial_realpath function to resolve | |
187 | * symlinks and relatives paths at the start of the string, and | |
188 | * implements functionnalities to resolve the './' and '../' strings | |
189 | * in the middle of a path. This function is only necessary because | |
190 | * realpath(3) does not accept to resolve unexistent paths. | |
191 | * The returned string was allocated in the function, it is thus of | |
192 | * the responsibility of the caller to free this memory. | |
81b86775 | 193 | */ |
90e535ef | 194 | LTTNG_HIDDEN |
81b86775 DG |
195 | char *utils_expand_path(const char *path) |
196 | { | |
3d229795 | 197 | char *next, *previous, *slash, *start_path, *absolute_path = NULL; |
5de083f4 RB |
198 | char *last_token; |
199 | int is_dot, is_dotdot; | |
81b86775 DG |
200 | |
201 | /* Safety net */ | |
202 | if (path == NULL) { | |
203 | goto error; | |
204 | } | |
205 | ||
3d229795 RB |
206 | /* Allocate memory for the absolute_path */ |
207 | absolute_path = zmalloc(PATH_MAX); | |
208 | if (absolute_path == NULL) { | |
81b86775 DG |
209 | PERROR("zmalloc expand path"); |
210 | goto error; | |
211 | } | |
212 | ||
3d229795 RB |
213 | /* |
214 | * If the path is not already absolute nor explicitly relative, | |
215 | * consider we're in the current directory | |
216 | */ | |
217 | if (*path != '/' && strncmp(path, "./", 2) != 0 && | |
218 | strncmp(path, "../", 3) != 0) { | |
219 | snprintf(absolute_path, PATH_MAX, "./%s", path); | |
2dcd84b7 | 220 | /* Else, we just copy the path */ |
116f95d9 | 221 | } else { |
3d229795 RB |
222 | strncpy(absolute_path, path, PATH_MAX); |
223 | } | |
116f95d9 | 224 | |
3d229795 RB |
225 | /* Resolve partially our path */ |
226 | absolute_path = utils_partial_realpath(absolute_path, | |
227 | absolute_path, PATH_MAX); | |
116f95d9 | 228 | |
3d229795 RB |
229 | /* As long as we find '/./' in the working_path string */ |
230 | while ((next = strstr(absolute_path, "/./"))) { | |
116f95d9 | 231 | |
3d229795 RB |
232 | /* We prepare the start_path not containing it */ |
233 | start_path = strndup(absolute_path, next - absolute_path); | |
d9dbcf5e MD |
234 | if (!start_path) { |
235 | PERROR("strndup"); | |
236 | goto error; | |
237 | } | |
3d229795 RB |
238 | /* And we concatenate it with the part after this string */ |
239 | snprintf(absolute_path, PATH_MAX, "%s%s", start_path, next + 2); | |
116f95d9 | 240 | |
3d229795 RB |
241 | free(start_path); |
242 | } | |
116f95d9 | 243 | |
3d229795 RB |
244 | /* As long as we find '/../' in the working_path string */ |
245 | while ((next = strstr(absolute_path, "/../"))) { | |
246 | /* We find the last level of directory */ | |
247 | previous = absolute_path; | |
248 | while ((slash = strpbrk(previous, "/")) && slash != next) { | |
249 | previous = slash + 1; | |
81b86775 | 250 | } |
81b86775 | 251 | |
3d229795 RB |
252 | /* Then we prepare the start_path not containing it */ |
253 | start_path = strndup(absolute_path, previous - absolute_path); | |
d9dbcf5e MD |
254 | if (!start_path) { |
255 | PERROR("strndup"); | |
256 | goto error; | |
257 | } | |
3d229795 RB |
258 | |
259 | /* And we concatenate it with the part after the '/../' */ | |
260 | snprintf(absolute_path, PATH_MAX, "%s%s", start_path, next + 4); | |
261 | ||
262 | /* We can free the memory used for the start path*/ | |
263 | free(start_path); | |
264 | ||
265 | /* Then we verify for symlinks using partial_realpath */ | |
266 | absolute_path = utils_partial_realpath(absolute_path, | |
267 | absolute_path, PATH_MAX); | |
116f95d9 | 268 | } |
81b86775 | 269 | |
5de083f4 RB |
270 | /* Identify the last token */ |
271 | last_token = strrchr(absolute_path, '/'); | |
272 | ||
273 | /* Verify that this token is not a relative path */ | |
274 | is_dotdot = (strcmp(last_token, "/..") == 0); | |
275 | is_dot = (strcmp(last_token, "/.") == 0); | |
276 | ||
277 | /* If it is, take action */ | |
278 | if (is_dot || is_dotdot) { | |
279 | /* For both, remove this token */ | |
280 | *last_token = '\0'; | |
281 | ||
282 | /* If it was a reference to parent directory, go back one more time */ | |
283 | if (is_dotdot) { | |
284 | last_token = strrchr(absolute_path, '/'); | |
285 | ||
286 | /* If there was only one level left, we keep the first '/' */ | |
287 | if (last_token == absolute_path) { | |
288 | last_token++; | |
289 | } | |
290 | ||
291 | *last_token = '\0'; | |
292 | } | |
293 | } | |
294 | ||
3d229795 | 295 | return absolute_path; |
81b86775 DG |
296 | |
297 | error: | |
3d229795 | 298 | free(absolute_path); |
81b86775 DG |
299 | return NULL; |
300 | } | |
301 | ||
302 | /* | |
303 | * Create a pipe in dst. | |
304 | */ | |
90e535ef | 305 | LTTNG_HIDDEN |
81b86775 DG |
306 | int utils_create_pipe(int *dst) |
307 | { | |
308 | int ret; | |
309 | ||
310 | if (dst == NULL) { | |
311 | return -1; | |
312 | } | |
313 | ||
314 | ret = pipe(dst); | |
315 | if (ret < 0) { | |
316 | PERROR("create pipe"); | |
317 | } | |
318 | ||
319 | return ret; | |
320 | } | |
321 | ||
322 | /* | |
323 | * Create pipe and set CLOEXEC flag to both fd. | |
324 | * | |
325 | * Make sure the pipe opened by this function are closed at some point. Use | |
326 | * utils_close_pipe(). | |
327 | */ | |
90e535ef | 328 | LTTNG_HIDDEN |
81b86775 DG |
329 | int utils_create_pipe_cloexec(int *dst) |
330 | { | |
331 | int ret, i; | |
332 | ||
333 | if (dst == NULL) { | |
334 | return -1; | |
335 | } | |
336 | ||
337 | ret = utils_create_pipe(dst); | |
338 | if (ret < 0) { | |
339 | goto error; | |
340 | } | |
341 | ||
342 | for (i = 0; i < 2; i++) { | |
343 | ret = fcntl(dst[i], F_SETFD, FD_CLOEXEC); | |
344 | if (ret < 0) { | |
345 | PERROR("fcntl pipe cloexec"); | |
346 | goto error; | |
347 | } | |
348 | } | |
349 | ||
350 | error: | |
351 | return ret; | |
352 | } | |
353 | ||
094f381c MD |
354 | /* |
355 | * Create pipe and set fd flags to FD_CLOEXEC and O_NONBLOCK. | |
356 | * | |
357 | * Make sure the pipe opened by this function are closed at some point. Use | |
358 | * utils_close_pipe(). Using pipe() and fcntl rather than pipe2() to | |
359 | * support OSes other than Linux 2.6.23+. | |
360 | */ | |
361 | LTTNG_HIDDEN | |
362 | int utils_create_pipe_cloexec_nonblock(int *dst) | |
363 | { | |
364 | int ret, i; | |
365 | ||
366 | if (dst == NULL) { | |
367 | return -1; | |
368 | } | |
369 | ||
370 | ret = utils_create_pipe(dst); | |
371 | if (ret < 0) { | |
372 | goto error; | |
373 | } | |
374 | ||
375 | for (i = 0; i < 2; i++) { | |
376 | ret = fcntl(dst[i], F_SETFD, FD_CLOEXEC); | |
377 | if (ret < 0) { | |
378 | PERROR("fcntl pipe cloexec"); | |
379 | goto error; | |
380 | } | |
381 | /* | |
382 | * Note: we override any flag that could have been | |
383 | * previously set on the fd. | |
384 | */ | |
385 | ret = fcntl(dst[i], F_SETFL, O_NONBLOCK); | |
386 | if (ret < 0) { | |
387 | PERROR("fcntl pipe nonblock"); | |
388 | goto error; | |
389 | } | |
390 | } | |
391 | ||
392 | error: | |
393 | return ret; | |
394 | } | |
395 | ||
81b86775 DG |
396 | /* |
397 | * Close both read and write side of the pipe. | |
398 | */ | |
90e535ef | 399 | LTTNG_HIDDEN |
81b86775 DG |
400 | void utils_close_pipe(int *src) |
401 | { | |
402 | int i, ret; | |
403 | ||
404 | if (src == NULL) { | |
405 | return; | |
406 | } | |
407 | ||
408 | for (i = 0; i < 2; i++) { | |
409 | /* Safety check */ | |
410 | if (src[i] < 0) { | |
411 | continue; | |
412 | } | |
413 | ||
414 | ret = close(src[i]); | |
415 | if (ret) { | |
416 | PERROR("close pipe"); | |
417 | } | |
418 | } | |
419 | } | |
a4b92340 DG |
420 | |
421 | /* | |
422 | * Create a new string using two strings range. | |
423 | */ | |
90e535ef | 424 | LTTNG_HIDDEN |
a4b92340 DG |
425 | char *utils_strdupdelim(const char *begin, const char *end) |
426 | { | |
427 | char *str; | |
428 | ||
429 | str = zmalloc(end - begin + 1); | |
430 | if (str == NULL) { | |
431 | PERROR("zmalloc strdupdelim"); | |
432 | goto error; | |
433 | } | |
434 | ||
435 | memcpy(str, begin, end - begin); | |
436 | str[end - begin] = '\0'; | |
437 | ||
438 | error: | |
439 | return str; | |
440 | } | |
b662582b DG |
441 | |
442 | /* | |
443 | * Set CLOEXEC flag to the give file descriptor. | |
444 | */ | |
90e535ef | 445 | LTTNG_HIDDEN |
b662582b DG |
446 | int utils_set_fd_cloexec(int fd) |
447 | { | |
448 | int ret; | |
449 | ||
450 | if (fd < 0) { | |
451 | ret = -EINVAL; | |
452 | goto end; | |
453 | } | |
454 | ||
455 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); | |
456 | if (ret < 0) { | |
457 | PERROR("fcntl cloexec"); | |
458 | ret = -errno; | |
459 | } | |
460 | ||
461 | end: | |
462 | return ret; | |
463 | } | |
35f90c40 DG |
464 | |
465 | /* | |
466 | * Create pid file to the given path and filename. | |
467 | */ | |
90e535ef | 468 | LTTNG_HIDDEN |
35f90c40 DG |
469 | int utils_create_pid_file(pid_t pid, const char *filepath) |
470 | { | |
471 | int ret; | |
472 | FILE *fp; | |
473 | ||
474 | assert(filepath); | |
475 | ||
476 | fp = fopen(filepath, "w"); | |
477 | if (fp == NULL) { | |
478 | PERROR("open pid file %s", filepath); | |
479 | ret = -1; | |
480 | goto error; | |
481 | } | |
482 | ||
483 | ret = fprintf(fp, "%d\n", pid); | |
484 | if (ret < 0) { | |
485 | PERROR("fprintf pid file"); | |
e205d79b | 486 | goto error; |
35f90c40 DG |
487 | } |
488 | ||
e205d79b MD |
489 | if (fclose(fp)) { |
490 | PERROR("fclose"); | |
491 | } | |
35f90c40 | 492 | DBG("Pid %d written in file %s", pid, filepath); |
e205d79b | 493 | ret = 0; |
35f90c40 DG |
494 | error: |
495 | return ret; | |
496 | } | |
2d851108 | 497 | |
c9cb3e7d JG |
498 | /* |
499 | * Create lock file to the given path and filename. | |
500 | * Returns the associated file descriptor, -1 on error. | |
501 | */ | |
502 | LTTNG_HIDDEN | |
503 | int utils_create_lock_file(const char *filepath) | |
504 | { | |
505 | int ret; | |
506 | int fd; | |
507 | ||
508 | assert(filepath); | |
509 | ||
510 | fd = open(filepath, O_CREAT, | |
511 | O_WRONLY | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
512 | if (fd < 0) { | |
513 | PERROR("open lock file %s", filepath); | |
514 | ret = -1; | |
515 | goto error; | |
516 | } | |
517 | ||
518 | /* | |
519 | * Attempt to lock the file. If this fails, there is | |
520 | * already a process using the same lock file running | |
521 | * and we should exit. | |
522 | */ | |
523 | ret = flock(fd, LOCK_EX | LOCK_NB); | |
524 | if (ret) { | |
208ff148 | 525 | ERR("Could not get lock file %s, another instance is running.", |
c9cb3e7d | 526 | filepath); |
ffb0b851 JG |
527 | if (close(fd)) { |
528 | PERROR("close lock file"); | |
529 | } | |
c9cb3e7d JG |
530 | fd = ret; |
531 | goto error; | |
532 | } | |
533 | ||
534 | error: | |
535 | return fd; | |
536 | } | |
537 | ||
2d851108 | 538 | /* |
d77dded2 | 539 | * Create directory using the given path and mode. |
2d851108 DG |
540 | * |
541 | * On success, return 0 else a negative error code. | |
542 | */ | |
90e535ef | 543 | LTTNG_HIDDEN |
d77dded2 JG |
544 | int utils_mkdir(const char *path, mode_t mode, int uid, int gid) |
545 | { | |
546 | int ret; | |
547 | ||
548 | if (uid < 0 || gid < 0) { | |
549 | ret = mkdir(path, mode); | |
550 | } else { | |
551 | ret = run_as_mkdir(path, mode, uid, gid); | |
552 | } | |
553 | if (ret < 0) { | |
554 | if (errno != EEXIST) { | |
555 | PERROR("mkdir %s, uid %d, gid %d", path ? path : "NULL", | |
556 | uid, gid); | |
557 | } else { | |
558 | ret = 0; | |
559 | } | |
560 | } | |
561 | ||
562 | return ret; | |
563 | } | |
564 | ||
565 | /* | |
566 | * Internal version of mkdir_recursive. Runs as the current user. | |
567 | * Don't call directly; use utils_mkdir_recursive(). | |
568 | * | |
569 | * This function is ominously marked as "unsafe" since it should only | |
570 | * be called by a caller that has transitioned to the uid and gid under which | |
571 | * the directory creation should occur. | |
572 | */ | |
573 | LTTNG_HIDDEN | |
574 | int _utils_mkdir_recursive_unsafe(const char *path, mode_t mode) | |
2d851108 DG |
575 | { |
576 | char *p, tmp[PATH_MAX]; | |
2d851108 DG |
577 | size_t len; |
578 | int ret; | |
579 | ||
580 | assert(path); | |
581 | ||
582 | ret = snprintf(tmp, sizeof(tmp), "%s", path); | |
583 | if (ret < 0) { | |
584 | PERROR("snprintf mkdir"); | |
585 | goto error; | |
586 | } | |
587 | ||
588 | len = ret; | |
589 | if (tmp[len - 1] == '/') { | |
590 | tmp[len - 1] = 0; | |
591 | } | |
592 | ||
593 | for (p = tmp + 1; *p; p++) { | |
594 | if (*p == '/') { | |
595 | *p = 0; | |
596 | if (tmp[strlen(tmp) - 1] == '.' && | |
597 | tmp[strlen(tmp) - 2] == '.' && | |
598 | tmp[strlen(tmp) - 3] == '/') { | |
599 | ERR("Using '/../' is not permitted in the trace path (%s)", | |
600 | tmp); | |
601 | ret = -1; | |
602 | goto error; | |
603 | } | |
0c7bcad5 | 604 | ret = mkdir(tmp, mode); |
2d851108 | 605 | if (ret < 0) { |
0c7bcad5 MD |
606 | if (errno != EEXIST) { |
607 | PERROR("mkdir recursive"); | |
608 | ret = -errno; | |
609 | goto error; | |
2d851108 DG |
610 | } |
611 | } | |
612 | *p = '/'; | |
613 | } | |
614 | } | |
615 | ||
616 | ret = mkdir(tmp, mode); | |
617 | if (ret < 0) { | |
618 | if (errno != EEXIST) { | |
d77dded2 | 619 | PERROR("mkdir recursive last element"); |
2d851108 DG |
620 | ret = -errno; |
621 | } else { | |
622 | ret = 0; | |
623 | } | |
624 | } | |
625 | ||
626 | error: | |
627 | return ret; | |
628 | } | |
fe4477ee | 629 | |
d77dded2 JG |
630 | /* |
631 | * Recursively create directory using the given path and mode, under the | |
632 | * provided uid and gid. | |
633 | * | |
634 | * On success, return 0 else a negative error code. | |
635 | */ | |
636 | LTTNG_HIDDEN | |
637 | int utils_mkdir_recursive(const char *path, mode_t mode, int uid, int gid) | |
638 | { | |
639 | int ret; | |
640 | ||
641 | if (uid < 0 || gid < 0) { | |
642 | /* Run as current user. */ | |
643 | ret = _utils_mkdir_recursive_unsafe(path, mode); | |
644 | } else { | |
645 | ret = run_as_mkdir_recursive(path, mode, uid, gid); | |
646 | } | |
647 | if (ret < 0) { | |
648 | PERROR("mkdir %s, uid %d, gid %d", path ? path : "NULL", | |
649 | uid, gid); | |
650 | } | |
651 | ||
652 | return ret; | |
653 | } | |
654 | ||
fe4477ee | 655 | /* |
d77dded2 | 656 | * path is the output parameter. It needs to be PATH_MAX len. |
fe4477ee JD |
657 | * |
658 | * Return 0 on success or else a negative value. | |
659 | */ | |
7591bab1 MD |
660 | static int utils_stream_file_name(char *path, |
661 | const char *path_name, const char *file_name, | |
662 | uint64_t size, uint64_t count, | |
663 | const char *suffix) | |
fe4477ee | 664 | { |
7591bab1 MD |
665 | int ret; |
666 | char full_path[PATH_MAX]; | |
667 | char *path_name_suffix = NULL; | |
309167d2 | 668 | char *extra = NULL; |
fe4477ee | 669 | |
fe4477ee JD |
670 | ret = snprintf(full_path, sizeof(full_path), "%s/%s", |
671 | path_name, file_name); | |
672 | if (ret < 0) { | |
673 | PERROR("snprintf create output file"); | |
674 | goto error; | |
675 | } | |
676 | ||
309167d2 JD |
677 | /* Setup extra string if suffix or/and a count is needed. */ |
678 | if (size > 0 && suffix) { | |
679 | ret = asprintf(&extra, "_%" PRIu64 "%s", count, suffix); | |
680 | } else if (size > 0) { | |
681 | ret = asprintf(&extra, "_%" PRIu64, count); | |
682 | } else if (suffix) { | |
683 | ret = asprintf(&extra, "%s", suffix); | |
684 | } | |
685 | if (ret < 0) { | |
686 | PERROR("Allocating extra string to name"); | |
687 | goto error; | |
688 | } | |
689 | ||
fe4477ee | 690 | /* |
7591bab1 MD |
691 | * If we split the trace in multiple files, we have to add the count at |
692 | * the end of the tracefile name. | |
fe4477ee | 693 | */ |
309167d2 JD |
694 | if (extra) { |
695 | ret = asprintf(&path_name_suffix, "%s%s", full_path, extra); | |
fe4477ee | 696 | if (ret < 0) { |
309167d2 JD |
697 | PERROR("Allocating path name with extra string"); |
698 | goto error_free_suffix; | |
fe4477ee | 699 | } |
7591bab1 MD |
700 | strncpy(path, path_name_suffix, PATH_MAX - 1); |
701 | path[PATH_MAX - 1] = '\0'; | |
fe4477ee | 702 | } else { |
7591bab1 MD |
703 | strncpy(path, full_path, PATH_MAX - 1); |
704 | } | |
705 | path[PATH_MAX - 1] = '\0'; | |
706 | ret = 0; | |
707 | ||
708 | free(path_name_suffix); | |
709 | error_free_suffix: | |
710 | free(extra); | |
711 | error: | |
712 | return ret; | |
713 | } | |
714 | ||
715 | /* | |
716 | * Create the stream file on disk. | |
717 | * | |
718 | * Return 0 on success or else a negative value. | |
719 | */ | |
720 | LTTNG_HIDDEN | |
721 | int utils_create_stream_file(const char *path_name, char *file_name, uint64_t size, | |
722 | uint64_t count, int uid, int gid, char *suffix) | |
723 | { | |
724 | int ret, flags, mode; | |
725 | char path[PATH_MAX]; | |
726 | ||
727 | ret = utils_stream_file_name(path, path_name, file_name, | |
728 | size, count, suffix); | |
729 | if (ret < 0) { | |
730 | goto error; | |
fe4477ee JD |
731 | } |
732 | ||
be96a7d1 | 733 | flags = O_WRONLY | O_CREAT | O_TRUNC; |
0f907de1 | 734 | /* Open with 660 mode */ |
be96a7d1 DG |
735 | mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP; |
736 | ||
737 | if (uid < 0 || gid < 0) { | |
7591bab1 | 738 | ret = open(path, flags, mode); |
be96a7d1 | 739 | } else { |
7591bab1 | 740 | ret = run_as_open(path, flags, mode, uid, gid); |
be96a7d1 | 741 | } |
7591bab1 | 742 | if (ret < 0) { |
fe4477ee | 743 | PERROR("open stream path %s", path); |
fe4477ee | 744 | } |
7591bab1 MD |
745 | error: |
746 | return ret; | |
747 | } | |
fe4477ee | 748 | |
7591bab1 MD |
749 | /* |
750 | * Unlink the stream tracefile from disk. | |
751 | * | |
752 | * Return 0 on success or else a negative value. | |
753 | */ | |
754 | LTTNG_HIDDEN | |
755 | int utils_unlink_stream_file(const char *path_name, char *file_name, uint64_t size, | |
756 | uint64_t count, int uid, int gid, char *suffix) | |
757 | { | |
758 | int ret; | |
759 | char path[PATH_MAX]; | |
760 | ||
761 | ret = utils_stream_file_name(path, path_name, file_name, | |
762 | size, count, suffix); | |
763 | if (ret < 0) { | |
764 | goto error; | |
765 | } | |
766 | if (uid < 0 || gid < 0) { | |
767 | ret = unlink(path); | |
768 | } else { | |
769 | ret = run_as_unlink(path, uid, gid); | |
7591bab1 MD |
770 | } |
771 | if (ret < 0) { | |
772 | goto error; | |
773 | } | |
fe4477ee | 774 | error: |
7591bab1 | 775 | DBG("utils_unlink_stream_file %s returns %d", path, ret); |
fe4477ee JD |
776 | return ret; |
777 | } | |
778 | ||
779 | /* | |
780 | * Change the output tracefile according to the given size and count The | |
781 | * new_count pointer is set during this operation. | |
782 | * | |
783 | * From the consumer, the stream lock MUST be held before calling this function | |
784 | * because we are modifying the stream status. | |
785 | * | |
786 | * Return 0 on success or else a negative value. | |
787 | */ | |
bc182241 | 788 | LTTNG_HIDDEN |
fe4477ee | 789 | int utils_rotate_stream_file(char *path_name, char *file_name, uint64_t size, |
309167d2 JD |
790 | uint64_t count, int uid, int gid, int out_fd, uint64_t *new_count, |
791 | int *stream_fd) | |
fe4477ee JD |
792 | { |
793 | int ret; | |
794 | ||
309167d2 JD |
795 | assert(new_count); |
796 | assert(stream_fd); | |
797 | ||
fe4477ee JD |
798 | ret = close(out_fd); |
799 | if (ret < 0) { | |
800 | PERROR("Closing tracefile"); | |
801 | goto error; | |
802 | } | |
803 | ||
804 | if (count > 0) { | |
7591bab1 MD |
805 | /* |
806 | * In tracefile rotation, for the relay daemon we need | |
807 | * to unlink the old file if present, because it may | |
808 | * still be open in reading by the live thread, and we | |
809 | * need to ensure that we do not overwrite the content | |
810 | * between get_index and get_packet. Since we have no | |
811 | * way to verify integrity of the data content compared | |
812 | * to the associated index, we need to ensure the reader | |
813 | * has exclusive access to the file content, and that | |
814 | * the open of the data file is performed in get_index. | |
815 | * Unlinking the old file rather than overwriting it | |
816 | * achieves this. | |
817 | */ | |
fe4477ee | 818 | *new_count = (*new_count + 1) % count; |
7591bab1 MD |
819 | ret = utils_unlink_stream_file(path_name, file_name, |
820 | size, *new_count, uid, gid, 0); | |
821 | if (ret < 0 && errno != ENOENT) { | |
822 | goto error; | |
823 | } | |
fe4477ee JD |
824 | } else { |
825 | (*new_count)++; | |
826 | } | |
827 | ||
309167d2 JD |
828 | ret = utils_create_stream_file(path_name, file_name, size, *new_count, |
829 | uid, gid, 0); | |
830 | if (ret < 0) { | |
831 | goto error; | |
832 | } | |
833 | *stream_fd = ret; | |
834 | ||
835 | /* Success. */ | |
836 | ret = 0; | |
837 | ||
fe4477ee JD |
838 | error: |
839 | return ret; | |
840 | } | |
70d0b120 | 841 | |
70d0b120 SM |
842 | |
843 | /** | |
844 | * Parse a string that represents a size in human readable format. It | |
5983a922 | 845 | * supports decimal integers suffixed by 'k', 'K', 'M' or 'G'. |
70d0b120 SM |
846 | * |
847 | * The suffix multiply the integer by: | |
848 | * 'k': 1024 | |
849 | * 'M': 1024^2 | |
850 | * 'G': 1024^3 | |
851 | * | |
852 | * @param str The string to parse. | |
5983a922 | 853 | * @param size Pointer to a uint64_t that will be filled with the |
cfa9a5a2 | 854 | * resulting size. |
70d0b120 SM |
855 | * |
856 | * @return 0 on success, -1 on failure. | |
857 | */ | |
00a52467 | 858 | LTTNG_HIDDEN |
5983a922 | 859 | int utils_parse_size_suffix(const char * const str, uint64_t * const size) |
70d0b120 | 860 | { |
70d0b120 | 861 | int ret; |
5983a922 | 862 | uint64_t base_size; |
70d0b120 | 863 | long shift = 0; |
5983a922 SM |
864 | const char *str_end; |
865 | char *num_end; | |
70d0b120 SM |
866 | |
867 | if (!str) { | |
5983a922 | 868 | DBG("utils_parse_size_suffix: received a NULL string."); |
70d0b120 SM |
869 | ret = -1; |
870 | goto end; | |
871 | } | |
872 | ||
5983a922 SM |
873 | /* strtoull will accept a negative number, but we don't want to. */ |
874 | if (strchr(str, '-') != NULL) { | |
875 | DBG("utils_parse_size_suffix: invalid size string, should not contain '-'."); | |
70d0b120 | 876 | ret = -1; |
5983a922 | 877 | goto end; |
70d0b120 SM |
878 | } |
879 | ||
5983a922 SM |
880 | /* str_end will point to the \0 */ |
881 | str_end = str + strlen(str); | |
70d0b120 | 882 | errno = 0; |
5983a922 | 883 | base_size = strtoull(str, &num_end, 0); |
70d0b120 | 884 | if (errno != 0) { |
5983a922 | 885 | PERROR("utils_parse_size_suffix strtoull"); |
70d0b120 | 886 | ret = -1; |
5983a922 SM |
887 | goto end; |
888 | } | |
889 | ||
890 | if (num_end == str) { | |
891 | /* strtoull parsed nothing, not good. */ | |
892 | DBG("utils_parse_size_suffix: strtoull had nothing good to parse."); | |
893 | ret = -1; | |
894 | goto end; | |
895 | } | |
896 | ||
897 | /* Check if a prefix is present. */ | |
898 | switch (*num_end) { | |
899 | case 'G': | |
900 | shift = GIBI_LOG2; | |
901 | num_end++; | |
902 | break; | |
903 | case 'M': /* */ | |
904 | shift = MEBI_LOG2; | |
905 | num_end++; | |
906 | break; | |
907 | case 'K': | |
908 | case 'k': | |
909 | shift = KIBI_LOG2; | |
910 | num_end++; | |
911 | break; | |
912 | case '\0': | |
913 | break; | |
914 | default: | |
915 | DBG("utils_parse_size_suffix: invalid suffix."); | |
916 | ret = -1; | |
917 | goto end; | |
918 | } | |
919 | ||
920 | /* Check for garbage after the valid input. */ | |
921 | if (num_end != str_end) { | |
922 | DBG("utils_parse_size_suffix: Garbage after size string."); | |
923 | ret = -1; | |
924 | goto end; | |
70d0b120 SM |
925 | } |
926 | ||
927 | *size = base_size << shift; | |
928 | ||
929 | /* Check for overflow */ | |
930 | if ((*size >> shift) != base_size) { | |
5983a922 | 931 | DBG("utils_parse_size_suffix: oops, overflow detected."); |
70d0b120 | 932 | ret = -1; |
5983a922 | 933 | goto end; |
70d0b120 SM |
934 | } |
935 | ||
936 | ret = 0; | |
70d0b120 SM |
937 | end: |
938 | return ret; | |
939 | } | |
cfa9a5a2 DG |
940 | |
941 | /* | |
942 | * fls: returns the position of the most significant bit. | |
943 | * Returns 0 if no bit is set, else returns the position of the most | |
944 | * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit). | |
945 | */ | |
946 | #if defined(__i386) || defined(__x86_64) | |
947 | static inline unsigned int fls_u32(uint32_t x) | |
948 | { | |
949 | int r; | |
950 | ||
951 | asm("bsrl %1,%0\n\t" | |
952 | "jnz 1f\n\t" | |
953 | "movl $-1,%0\n\t" | |
954 | "1:\n\t" | |
955 | : "=r" (r) : "rm" (x)); | |
956 | return r + 1; | |
957 | } | |
958 | #define HAS_FLS_U32 | |
959 | #endif | |
960 | ||
961 | #ifndef HAS_FLS_U32 | |
962 | static __attribute__((unused)) unsigned int fls_u32(uint32_t x) | |
963 | { | |
964 | unsigned int r = 32; | |
965 | ||
966 | if (!x) { | |
967 | return 0; | |
968 | } | |
969 | if (!(x & 0xFFFF0000U)) { | |
970 | x <<= 16; | |
971 | r -= 16; | |
972 | } | |
973 | if (!(x & 0xFF000000U)) { | |
974 | x <<= 8; | |
975 | r -= 8; | |
976 | } | |
977 | if (!(x & 0xF0000000U)) { | |
978 | x <<= 4; | |
979 | r -= 4; | |
980 | } | |
981 | if (!(x & 0xC0000000U)) { | |
982 | x <<= 2; | |
983 | r -= 2; | |
984 | } | |
985 | if (!(x & 0x80000000U)) { | |
986 | x <<= 1; | |
987 | r -= 1; | |
988 | } | |
989 | return r; | |
990 | } | |
991 | #endif | |
992 | ||
993 | /* | |
994 | * Return the minimum order for which x <= (1UL << order). | |
995 | * Return -1 if x is 0. | |
996 | */ | |
997 | LTTNG_HIDDEN | |
998 | int utils_get_count_order_u32(uint32_t x) | |
999 | { | |
1000 | if (!x) { | |
1001 | return -1; | |
1002 | } | |
1003 | ||
1004 | return fls_u32(x - 1); | |
1005 | } | |
feb0f3e5 AM |
1006 | |
1007 | /** | |
1008 | * Obtain the value of LTTNG_HOME environment variable, if exists. | |
1009 | * Otherwise returns the value of HOME. | |
1010 | */ | |
00a52467 | 1011 | LTTNG_HIDDEN |
feb0f3e5 AM |
1012 | char *utils_get_home_dir(void) |
1013 | { | |
1014 | char *val = NULL; | |
04135dbd DG |
1015 | struct passwd *pwd; |
1016 | ||
e8fa9fb0 | 1017 | val = lttng_secure_getenv(DEFAULT_LTTNG_HOME_ENV_VAR); |
feb0f3e5 | 1018 | if (val != NULL) { |
04135dbd DG |
1019 | goto end; |
1020 | } | |
e8fa9fb0 | 1021 | val = lttng_secure_getenv(DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR); |
04135dbd DG |
1022 | if (val != NULL) { |
1023 | goto end; | |
feb0f3e5 | 1024 | } |
04135dbd DG |
1025 | |
1026 | /* Fallback on the password file entry. */ | |
1027 | pwd = getpwuid(getuid()); | |
1028 | if (!pwd) { | |
1029 | goto end; | |
1030 | } | |
1031 | val = pwd->pw_dir; | |
1032 | ||
1033 | DBG3("Home directory is '%s'", val); | |
1034 | ||
1035 | end: | |
1036 | return val; | |
feb0f3e5 | 1037 | } |
26fe5938 | 1038 | |
fb198a11 JG |
1039 | /** |
1040 | * Get user's home directory. Dynamically allocated, must be freed | |
1041 | * by the caller. | |
1042 | */ | |
1043 | LTTNG_HIDDEN | |
1044 | char *utils_get_user_home_dir(uid_t uid) | |
1045 | { | |
1046 | struct passwd pwd; | |
1047 | struct passwd *result; | |
1048 | char *home_dir = NULL; | |
1049 | char *buf = NULL; | |
1050 | long buflen; | |
1051 | int ret; | |
1052 | ||
1053 | buflen = sysconf(_SC_GETPW_R_SIZE_MAX); | |
1054 | if (buflen == -1) { | |
1055 | goto end; | |
1056 | } | |
1057 | retry: | |
1058 | buf = zmalloc(buflen); | |
1059 | if (!buf) { | |
1060 | goto end; | |
1061 | } | |
1062 | ||
1063 | ret = getpwuid_r(uid, &pwd, buf, buflen, &result); | |
1064 | if (ret || !result) { | |
1065 | if (ret == ERANGE) { | |
1066 | free(buf); | |
1067 | buflen *= 2; | |
1068 | goto retry; | |
1069 | } | |
1070 | goto end; | |
1071 | } | |
1072 | ||
1073 | home_dir = strdup(pwd.pw_dir); | |
1074 | end: | |
1075 | free(buf); | |
1076 | return home_dir; | |
1077 | } | |
1078 | ||
fbb9748b JG |
1079 | /* |
1080 | * Obtain the value of LTTNG_KMOD_PROBES environment variable, if exists. | |
c9d42407 | 1081 | * Otherwise returns NULL. |
fbb9748b JG |
1082 | */ |
1083 | LTTNG_HIDDEN | |
1084 | char *utils_get_kmod_probes_list(void) | |
1085 | { | |
e8fa9fb0 | 1086 | return lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES); |
fbb9748b JG |
1087 | } |
1088 | ||
c9d42407 PP |
1089 | /* |
1090 | * Obtain the value of LTTNG_EXTRA_KMOD_PROBES environment variable, if | |
1091 | * exists. Otherwise returns NULL. | |
1092 | */ | |
1093 | LTTNG_HIDDEN | |
1094 | char *utils_get_extra_kmod_probes_list(void) | |
1095 | { | |
e8fa9fb0 | 1096 | return lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES); |
c9d42407 PP |
1097 | } |
1098 | ||
26fe5938 DG |
1099 | /* |
1100 | * With the given format, fill dst with the time of len maximum siz. | |
1101 | * | |
1102 | * Return amount of bytes set in the buffer or else 0 on error. | |
1103 | */ | |
1104 | LTTNG_HIDDEN | |
1105 | size_t utils_get_current_time_str(const char *format, char *dst, size_t len) | |
1106 | { | |
1107 | size_t ret; | |
1108 | time_t rawtime; | |
1109 | struct tm *timeinfo; | |
1110 | ||
1111 | assert(format); | |
1112 | assert(dst); | |
1113 | ||
1114 | /* Get date and time for session path */ | |
1115 | time(&rawtime); | |
1116 | timeinfo = localtime(&rawtime); | |
1117 | ret = strftime(dst, len, format, timeinfo); | |
1118 | if (ret == 0) { | |
68e6efdd | 1119 | ERR("Unable to strftime with format %s at dst %p of len %zu", format, |
26fe5938 DG |
1120 | dst, len); |
1121 | } | |
1122 | ||
1123 | return ret; | |
1124 | } | |
6c71277b MD |
1125 | |
1126 | /* | |
1127 | * Return the group ID matching name, else 0 if it cannot be found. | |
1128 | */ | |
1129 | LTTNG_HIDDEN | |
1130 | gid_t utils_get_group_id(const char *name) | |
1131 | { | |
1132 | struct group *grp; | |
1133 | ||
1134 | grp = getgrnam(name); | |
1135 | if (!grp) { | |
1136 | static volatile int warn_once; | |
1137 | ||
1138 | if (!warn_once) { | |
1139 | WARN("No tracing group detected"); | |
1140 | warn_once = 1; | |
1141 | } | |
1142 | return 0; | |
1143 | } | |
1144 | return grp->gr_gid; | |
1145 | } | |
8db0dc00 JG |
1146 | |
1147 | /* | |
1148 | * Return a newly allocated option string. This string is to be used as the | |
1149 | * optstring argument of getopt_long(), see GETOPT(3). opt_count is the number | |
1150 | * of elements in the long_options array. Returns NULL if the string's | |
1151 | * allocation fails. | |
1152 | */ | |
1153 | LTTNG_HIDDEN | |
1154 | char *utils_generate_optstring(const struct option *long_options, | |
1155 | size_t opt_count) | |
1156 | { | |
1157 | int i; | |
1158 | size_t string_len = opt_count, str_pos = 0; | |
1159 | char *optstring; | |
1160 | ||
1161 | /* | |
1162 | * Compute the necessary string length. One letter per option, two when an | |
1163 | * argument is necessary, and a trailing NULL. | |
1164 | */ | |
1165 | for (i = 0; i < opt_count; i++) { | |
1166 | string_len += long_options[i].has_arg ? 1 : 0; | |
1167 | } | |
1168 | ||
1169 | optstring = zmalloc(string_len); | |
1170 | if (!optstring) { | |
1171 | goto end; | |
1172 | } | |
1173 | ||
1174 | for (i = 0; i < opt_count; i++) { | |
1175 | if (!long_options[i].name) { | |
1176 | /* Got to the trailing NULL element */ | |
1177 | break; | |
1178 | } | |
1179 | ||
a596dcb9 JG |
1180 | if (long_options[i].val != '\0') { |
1181 | optstring[str_pos++] = (char) long_options[i].val; | |
1182 | if (long_options[i].has_arg) { | |
1183 | optstring[str_pos++] = ':'; | |
1184 | } | |
8db0dc00 JG |
1185 | } |
1186 | } | |
1187 | ||
1188 | end: | |
1189 | return optstring; | |
1190 | } | |
3d071855 MD |
1191 | |
1192 | /* | |
1193 | * Try to remove a hierarchy of empty directories, recursively. Don't unlink | |
9529ec1b | 1194 | * any file. Try to rmdir any empty directory within the hierarchy. |
3d071855 MD |
1195 | */ |
1196 | LTTNG_HIDDEN | |
1197 | int utils_recursive_rmdir(const char *path) | |
1198 | { | |
1199 | DIR *dir; | |
9529ec1b | 1200 | int dir_fd, ret = 0, closeret, is_empty = 1; |
3d071855 MD |
1201 | struct dirent *entry; |
1202 | ||
1203 | /* Open directory */ | |
1204 | dir = opendir(path); | |
1205 | if (!dir) { | |
1206 | PERROR("Cannot open '%s' path", path); | |
1207 | return -1; | |
1208 | } | |
1209 | dir_fd = dirfd(dir); | |
1210 | if (dir_fd < 0) { | |
1211 | PERROR("dirfd"); | |
1212 | return -1; | |
1213 | } | |
1214 | ||
1215 | while ((entry = readdir(dir))) { | |
1216 | if (!strcmp(entry->d_name, ".") | |
1217 | || !strcmp(entry->d_name, "..")) | |
1218 | continue; | |
1219 | switch (entry->d_type) { | |
1220 | case DT_DIR: | |
1221 | { | |
1222 | char subpath[PATH_MAX]; | |
1223 | ||
1224 | strncpy(subpath, path, PATH_MAX); | |
1225 | subpath[PATH_MAX - 1] = '\0'; | |
1226 | strncat(subpath, "/", | |
1227 | PATH_MAX - strlen(subpath) - 1); | |
1228 | strncat(subpath, entry->d_name, | |
1229 | PATH_MAX - strlen(subpath) - 1); | |
9529ec1b MD |
1230 | if (utils_recursive_rmdir(subpath)) { |
1231 | is_empty = 0; | |
3d071855 MD |
1232 | } |
1233 | break; | |
1234 | } | |
1235 | case DT_REG: | |
9529ec1b MD |
1236 | is_empty = 0; |
1237 | break; | |
3d071855 MD |
1238 | default: |
1239 | ret = -EINVAL; | |
1240 | goto end; | |
1241 | } | |
1242 | } | |
1243 | end: | |
1244 | closeret = closedir(dir); | |
1245 | if (closeret) { | |
1246 | PERROR("closedir"); | |
1247 | } | |
9529ec1b | 1248 | if (is_empty) { |
3d071855 MD |
1249 | DBG3("Attempting rmdir %s", path); |
1250 | ret = rmdir(path); | |
1251 | } | |
1252 | return ret; | |
1253 | } |