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 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
35f90c40 | 21 | #include <assert.h> |
81b86775 DG |
22 | #include <ctype.h> |
23 | #include <fcntl.h> | |
24 | #include <limits.h> | |
25 | #include <stdlib.h> | |
2d851108 | 26 | #include <sys/stat.h> |
0c7bcad5 | 27 | #include <sys/types.h> |
2d851108 | 28 | #include <unistd.h> |
fe4477ee | 29 | #include <inttypes.h> |
6c71277b | 30 | #include <grp.h> |
fb198a11 | 31 | #include <pwd.h> |
c9cb3e7d | 32 | #include <sys/file.h> |
81b86775 DG |
33 | |
34 | #include <common/common.h> | |
fe4477ee | 35 | #include <common/runas.h> |
e8fa9fb0 | 36 | #include <common/compat/getenv.h> |
f5436bfc | 37 | #include <common/compat/string.h> |
5a2451c9 | 38 | #include <common/compat/dirent.h> |
81b86775 DG |
39 | |
40 | #include "utils.h" | |
feb0f3e5 | 41 | #include "defaults.h" |
81b86775 | 42 | |
5154230f RB |
43 | /* |
44 | * Return a partial realpath(3) of the path even if the full path does not | |
45 | * exist. For instance, with /tmp/test1/test2/test3, if test2/ does not exist | |
46 | * but the /tmp/test1 does, the real path for /tmp/test1 is concatened with | |
47 | * /test2/test3 then returned. In normal time, realpath(3) fails if the end | |
48 | * point directory does not exist. | |
49 | * In case resolved_path is NULL, the string returned was allocated in the | |
50 | * function and thus need to be freed by the caller. The size argument allows | |
51 | * to specify the size of the resolved_path argument if given, or the size to | |
52 | * allocate. | |
53 | */ | |
54 | LTTNG_HIDDEN | |
55 | char *utils_partial_realpath(const char *path, char *resolved_path, size_t size) | |
56 | { | |
9482daac | 57 | char *cut_path = NULL, *try_path = NULL, *try_path_prev = NULL; |
5154230f RB |
58 | const char *next, *prev, *end; |
59 | ||
60 | /* Safety net */ | |
61 | if (path == NULL) { | |
62 | goto error; | |
63 | } | |
64 | ||
65 | /* | |
66 | * Identify the end of the path, we don't want to treat the | |
67 | * last char if it is a '/', we will just keep it on the side | |
68 | * to be added at the end, and return a value coherent with | |
69 | * the path given as argument | |
70 | */ | |
71 | end = path + strlen(path); | |
72 | if (*(end-1) == '/') { | |
73 | end--; | |
74 | } | |
75 | ||
76 | /* Initiate the values of the pointers before looping */ | |
77 | next = path; | |
78 | prev = next; | |
79 | /* Only to ensure try_path is not NULL to enter the while */ | |
80 | try_path = (char *)next; | |
81 | ||
82 | /* Resolve the canonical path of the first part of the path */ | |
83 | while (try_path != NULL && next != end) { | |
84 | /* | |
85 | * If there is not any '/' left, we want to try with | |
86 | * the full path | |
87 | */ | |
88 | next = strpbrk(next + 1, "/"); | |
89 | if (next == NULL) { | |
90 | next = end; | |
91 | } | |
92 | ||
93 | /* Cut the part we will be trying to resolve */ | |
f5436bfc | 94 | cut_path = lttng_strndup(path, next - path); |
d9dbcf5e | 95 | if (cut_path == NULL) { |
f5436bfc | 96 | PERROR("lttng_strndup"); |
d9dbcf5e MD |
97 | goto error; |
98 | } | |
5154230f RB |
99 | |
100 | /* Try to resolve this part */ | |
101 | try_path = realpath((char *)cut_path, NULL); | |
102 | if (try_path == NULL) { | |
103 | /* | |
104 | * There was an error, we just want to be assured it | |
105 | * is linked to an unexistent directory, if it's another | |
106 | * reason, we spawn an error | |
107 | */ | |
108 | switch (errno) { | |
109 | case ENOENT: | |
110 | /* Ignore the error */ | |
111 | break; | |
112 | default: | |
113 | PERROR("realpath (partial_realpath)"); | |
114 | goto error; | |
115 | break; | |
116 | } | |
117 | } else { | |
118 | /* Save the place we are before trying the next step */ | |
119 | free(try_path_prev); | |
120 | try_path_prev = try_path; | |
121 | prev = next; | |
122 | } | |
123 | ||
124 | /* Free the allocated memory */ | |
125 | free(cut_path); | |
c14cc491 | 126 | cut_path = NULL; |
494a8e99 | 127 | } |
5154230f RB |
128 | |
129 | /* Allocate memory for the resolved path if necessary */ | |
130 | if (resolved_path == NULL) { | |
131 | resolved_path = zmalloc(size); | |
132 | if (resolved_path == NULL) { | |
133 | PERROR("zmalloc resolved path"); | |
134 | goto error; | |
135 | } | |
136 | } | |
137 | ||
138 | /* | |
139 | * If we were able to solve at least partially the path, we can concatenate | |
140 | * what worked and what didn't work | |
141 | */ | |
142 | if (try_path_prev != NULL) { | |
143 | /* If we risk to concatenate two '/', we remove one of them */ | |
144 | if (try_path_prev[strlen(try_path_prev) - 1] == '/' && prev[0] == '/') { | |
145 | try_path_prev[strlen(try_path_prev) - 1] = '\0'; | |
146 | } | |
147 | ||
148 | /* | |
149 | * Duplicate the memory used by prev in case resolved_path and | |
150 | * path are pointers for the same memory space | |
151 | */ | |
152 | cut_path = strdup(prev); | |
d9dbcf5e MD |
153 | if (cut_path == NULL) { |
154 | PERROR("strdup"); | |
155 | goto error; | |
156 | } | |
5154230f RB |
157 | |
158 | /* Concatenate the strings */ | |
159 | snprintf(resolved_path, size, "%s%s", try_path_prev, cut_path); | |
160 | ||
161 | /* Free the allocated memory */ | |
162 | free(cut_path); | |
163 | free(try_path_prev); | |
494a8e99 JG |
164 | cut_path = NULL; |
165 | try_path_prev = NULL; | |
5154230f RB |
166 | /* |
167 | * Else, we just copy the path in our resolved_path to | |
168 | * return it as is | |
169 | */ | |
170 | } else { | |
171 | strncpy(resolved_path, path, size); | |
172 | } | |
173 | ||
174 | /* Then we return the 'partially' resolved path */ | |
175 | return resolved_path; | |
176 | ||
177 | error: | |
178 | free(resolved_path); | |
9482daac | 179 | free(cut_path); |
5154230f RB |
180 | return NULL; |
181 | } | |
182 | ||
81b86775 | 183 | /* |
3d229795 RB |
184 | * Make a full resolution of the given path even if it doesn't exist. |
185 | * This function uses the utils_partial_realpath function to resolve | |
186 | * symlinks and relatives paths at the start of the string, and | |
187 | * implements functionnalities to resolve the './' and '../' strings | |
188 | * in the middle of a path. This function is only necessary because | |
189 | * realpath(3) does not accept to resolve unexistent paths. | |
190 | * The returned string was allocated in the function, it is thus of | |
191 | * the responsibility of the caller to free this memory. | |
81b86775 | 192 | */ |
90e535ef | 193 | LTTNG_HIDDEN |
81b86775 DG |
194 | char *utils_expand_path(const char *path) |
195 | { | |
3d229795 | 196 | char *next, *previous, *slash, *start_path, *absolute_path = NULL; |
5de083f4 RB |
197 | char *last_token; |
198 | int is_dot, is_dotdot; | |
81b86775 DG |
199 | |
200 | /* Safety net */ | |
201 | if (path == NULL) { | |
202 | goto error; | |
203 | } | |
204 | ||
3d229795 RB |
205 | /* Allocate memory for the absolute_path */ |
206 | absolute_path = zmalloc(PATH_MAX); | |
207 | if (absolute_path == NULL) { | |
81b86775 DG |
208 | PERROR("zmalloc expand path"); |
209 | goto error; | |
210 | } | |
211 | ||
3d229795 RB |
212 | /* |
213 | * If the path is not already absolute nor explicitly relative, | |
214 | * consider we're in the current directory | |
215 | */ | |
216 | if (*path != '/' && strncmp(path, "./", 2) != 0 && | |
217 | strncmp(path, "../", 3) != 0) { | |
218 | snprintf(absolute_path, PATH_MAX, "./%s", path); | |
2dcd84b7 | 219 | /* Else, we just copy the path */ |
116f95d9 | 220 | } else { |
3d229795 RB |
221 | strncpy(absolute_path, path, PATH_MAX); |
222 | } | |
116f95d9 | 223 | |
3d229795 RB |
224 | /* Resolve partially our path */ |
225 | absolute_path = utils_partial_realpath(absolute_path, | |
226 | absolute_path, PATH_MAX); | |
116f95d9 | 227 | |
3d229795 RB |
228 | /* As long as we find '/./' in the working_path string */ |
229 | while ((next = strstr(absolute_path, "/./"))) { | |
116f95d9 | 230 | |
3d229795 | 231 | /* We prepare the start_path not containing it */ |
f5436bfc | 232 | start_path = lttng_strndup(absolute_path, next - absolute_path); |
d9dbcf5e | 233 | if (!start_path) { |
f5436bfc | 234 | PERROR("lttng_strndup"); |
d9dbcf5e MD |
235 | goto error; |
236 | } | |
3d229795 RB |
237 | /* And we concatenate it with the part after this string */ |
238 | snprintf(absolute_path, PATH_MAX, "%s%s", start_path, next + 2); | |
116f95d9 | 239 | |
3d229795 RB |
240 | free(start_path); |
241 | } | |
116f95d9 | 242 | |
3d229795 RB |
243 | /* As long as we find '/../' in the working_path string */ |
244 | while ((next = strstr(absolute_path, "/../"))) { | |
245 | /* We find the last level of directory */ | |
246 | previous = absolute_path; | |
247 | while ((slash = strpbrk(previous, "/")) && slash != next) { | |
248 | previous = slash + 1; | |
81b86775 | 249 | } |
81b86775 | 250 | |
3d229795 | 251 | /* Then we prepare the start_path not containing it */ |
f5436bfc | 252 | start_path = lttng_strndup(absolute_path, previous - absolute_path); |
d9dbcf5e | 253 | if (!start_path) { |
f5436bfc | 254 | PERROR("lttng_strndup"); |
d9dbcf5e MD |
255 | goto error; |
256 | } | |
3d229795 RB |
257 | |
258 | /* And we concatenate it with the part after the '/../' */ | |
259 | snprintf(absolute_path, PATH_MAX, "%s%s", start_path, next + 4); | |
260 | ||
261 | /* We can free the memory used for the start path*/ | |
262 | free(start_path); | |
263 | ||
264 | /* Then we verify for symlinks using partial_realpath */ | |
265 | absolute_path = utils_partial_realpath(absolute_path, | |
266 | absolute_path, PATH_MAX); | |
116f95d9 | 267 | } |
81b86775 | 268 | |
5de083f4 RB |
269 | /* Identify the last token */ |
270 | last_token = strrchr(absolute_path, '/'); | |
271 | ||
272 | /* Verify that this token is not a relative path */ | |
273 | is_dotdot = (strcmp(last_token, "/..") == 0); | |
274 | is_dot = (strcmp(last_token, "/.") == 0); | |
275 | ||
276 | /* If it is, take action */ | |
277 | if (is_dot || is_dotdot) { | |
278 | /* For both, remove this token */ | |
279 | *last_token = '\0'; | |
280 | ||
281 | /* If it was a reference to parent directory, go back one more time */ | |
282 | if (is_dotdot) { | |
283 | last_token = strrchr(absolute_path, '/'); | |
284 | ||
285 | /* If there was only one level left, we keep the first '/' */ | |
286 | if (last_token == absolute_path) { | |
287 | last_token++; | |
288 | } | |
289 | ||
290 | *last_token = '\0'; | |
291 | } | |
292 | } | |
293 | ||
3d229795 | 294 | return absolute_path; |
81b86775 DG |
295 | |
296 | error: | |
3d229795 | 297 | free(absolute_path); |
81b86775 DG |
298 | return NULL; |
299 | } | |
300 | ||
301 | /* | |
302 | * Create a pipe in dst. | |
303 | */ | |
90e535ef | 304 | LTTNG_HIDDEN |
81b86775 DG |
305 | int utils_create_pipe(int *dst) |
306 | { | |
307 | int ret; | |
308 | ||
309 | if (dst == NULL) { | |
310 | return -1; | |
311 | } | |
312 | ||
313 | ret = pipe(dst); | |
314 | if (ret < 0) { | |
315 | PERROR("create pipe"); | |
316 | } | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Create pipe and set CLOEXEC flag to both fd. | |
323 | * | |
324 | * Make sure the pipe opened by this function are closed at some point. Use | |
325 | * utils_close_pipe(). | |
326 | */ | |
90e535ef | 327 | LTTNG_HIDDEN |
81b86775 DG |
328 | int utils_create_pipe_cloexec(int *dst) |
329 | { | |
330 | int ret, i; | |
331 | ||
332 | if (dst == NULL) { | |
333 | return -1; | |
334 | } | |
335 | ||
336 | ret = utils_create_pipe(dst); | |
337 | if (ret < 0) { | |
338 | goto error; | |
339 | } | |
340 | ||
341 | for (i = 0; i < 2; i++) { | |
342 | ret = fcntl(dst[i], F_SETFD, FD_CLOEXEC); | |
343 | if (ret < 0) { | |
344 | PERROR("fcntl pipe cloexec"); | |
345 | goto error; | |
346 | } | |
347 | } | |
348 | ||
349 | error: | |
350 | return ret; | |
351 | } | |
352 | ||
094f381c MD |
353 | /* |
354 | * Create pipe and set fd flags to FD_CLOEXEC and O_NONBLOCK. | |
355 | * | |
356 | * Make sure the pipe opened by this function are closed at some point. Use | |
357 | * utils_close_pipe(). Using pipe() and fcntl rather than pipe2() to | |
358 | * support OSes other than Linux 2.6.23+. | |
359 | */ | |
360 | LTTNG_HIDDEN | |
361 | int utils_create_pipe_cloexec_nonblock(int *dst) | |
362 | { | |
363 | int ret, i; | |
364 | ||
365 | if (dst == NULL) { | |
366 | return -1; | |
367 | } | |
368 | ||
369 | ret = utils_create_pipe(dst); | |
370 | if (ret < 0) { | |
371 | goto error; | |
372 | } | |
373 | ||
374 | for (i = 0; i < 2; i++) { | |
375 | ret = fcntl(dst[i], F_SETFD, FD_CLOEXEC); | |
376 | if (ret < 0) { | |
377 | PERROR("fcntl pipe cloexec"); | |
378 | goto error; | |
379 | } | |
380 | /* | |
381 | * Note: we override any flag that could have been | |
382 | * previously set on the fd. | |
383 | */ | |
384 | ret = fcntl(dst[i], F_SETFL, O_NONBLOCK); | |
385 | if (ret < 0) { | |
386 | PERROR("fcntl pipe nonblock"); | |
387 | goto error; | |
388 | } | |
389 | } | |
390 | ||
391 | error: | |
392 | return ret; | |
393 | } | |
394 | ||
81b86775 DG |
395 | /* |
396 | * Close both read and write side of the pipe. | |
397 | */ | |
90e535ef | 398 | LTTNG_HIDDEN |
81b86775 DG |
399 | void utils_close_pipe(int *src) |
400 | { | |
401 | int i, ret; | |
402 | ||
403 | if (src == NULL) { | |
404 | return; | |
405 | } | |
406 | ||
407 | for (i = 0; i < 2; i++) { | |
408 | /* Safety check */ | |
409 | if (src[i] < 0) { | |
410 | continue; | |
411 | } | |
412 | ||
413 | ret = close(src[i]); | |
414 | if (ret) { | |
415 | PERROR("close pipe"); | |
416 | } | |
417 | } | |
418 | } | |
a4b92340 DG |
419 | |
420 | /* | |
421 | * Create a new string using two strings range. | |
422 | */ | |
90e535ef | 423 | LTTNG_HIDDEN |
a4b92340 DG |
424 | char *utils_strdupdelim(const char *begin, const char *end) |
425 | { | |
426 | char *str; | |
427 | ||
428 | str = zmalloc(end - begin + 1); | |
429 | if (str == NULL) { | |
430 | PERROR("zmalloc strdupdelim"); | |
431 | goto error; | |
432 | } | |
433 | ||
434 | memcpy(str, begin, end - begin); | |
435 | str[end - begin] = '\0'; | |
436 | ||
437 | error: | |
438 | return str; | |
439 | } | |
b662582b DG |
440 | |
441 | /* | |
442 | * Set CLOEXEC flag to the give file descriptor. | |
443 | */ | |
90e535ef | 444 | LTTNG_HIDDEN |
b662582b DG |
445 | int utils_set_fd_cloexec(int fd) |
446 | { | |
447 | int ret; | |
448 | ||
449 | if (fd < 0) { | |
450 | ret = -EINVAL; | |
451 | goto end; | |
452 | } | |
453 | ||
454 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); | |
455 | if (ret < 0) { | |
456 | PERROR("fcntl cloexec"); | |
457 | ret = -errno; | |
458 | } | |
459 | ||
460 | end: | |
461 | return ret; | |
462 | } | |
35f90c40 DG |
463 | |
464 | /* | |
465 | * Create pid file to the given path and filename. | |
466 | */ | |
90e535ef | 467 | LTTNG_HIDDEN |
35f90c40 DG |
468 | int utils_create_pid_file(pid_t pid, const char *filepath) |
469 | { | |
470 | int ret; | |
471 | FILE *fp; | |
472 | ||
473 | assert(filepath); | |
474 | ||
475 | fp = fopen(filepath, "w"); | |
476 | if (fp == NULL) { | |
477 | PERROR("open pid file %s", filepath); | |
478 | ret = -1; | |
479 | goto error; | |
480 | } | |
481 | ||
d1f721c5 | 482 | ret = fprintf(fp, "%d\n", (int) pid); |
35f90c40 DG |
483 | if (ret < 0) { |
484 | PERROR("fprintf pid file"); | |
e205d79b | 485 | goto error; |
35f90c40 DG |
486 | } |
487 | ||
e205d79b MD |
488 | if (fclose(fp)) { |
489 | PERROR("fclose"); | |
490 | } | |
d1f721c5 | 491 | DBG("Pid %d written in file %s", (int) pid, filepath); |
e205d79b | 492 | ret = 0; |
35f90c40 DG |
493 | error: |
494 | return ret; | |
495 | } | |
2d851108 | 496 | |
c9cb3e7d JG |
497 | /* |
498 | * Create lock file to the given path and filename. | |
499 | * Returns the associated file descriptor, -1 on error. | |
500 | */ | |
501 | LTTNG_HIDDEN | |
502 | int utils_create_lock_file(const char *filepath) | |
503 | { | |
504 | int ret; | |
505 | int fd; | |
77e7fddf | 506 | struct flock lock; |
c9cb3e7d JG |
507 | |
508 | assert(filepath); | |
509 | ||
77e7fddf MJ |
510 | memset(&lock, 0, sizeof(lock)); |
511 | fd = open(filepath, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR | | |
512 | S_IRGRP | S_IWGRP); | |
c9cb3e7d JG |
513 | if (fd < 0) { |
514 | PERROR("open lock file %s", filepath); | |
515 | ret = -1; | |
516 | goto error; | |
517 | } | |
518 | ||
519 | /* | |
520 | * Attempt to lock the file. If this fails, there is | |
521 | * already a process using the same lock file running | |
522 | * and we should exit. | |
523 | */ | |
77e7fddf MJ |
524 | lock.l_whence = SEEK_SET; |
525 | lock.l_type = F_WRLCK; | |
526 | ||
527 | ret = fcntl(fd, F_SETLK, &lock); | |
528 | if (ret == -1) { | |
529 | PERROR("fcntl lock file"); | |
208ff148 | 530 | ERR("Could not get lock file %s, another instance is running.", |
c9cb3e7d | 531 | filepath); |
ffb0b851 JG |
532 | if (close(fd)) { |
533 | PERROR("close lock file"); | |
534 | } | |
c9cb3e7d JG |
535 | fd = ret; |
536 | goto error; | |
537 | } | |
538 | ||
539 | error: | |
540 | return fd; | |
541 | } | |
542 | ||
2d851108 | 543 | /* |
d77dded2 | 544 | * Create directory using the given path and mode. |
2d851108 DG |
545 | * |
546 | * On success, return 0 else a negative error code. | |
547 | */ | |
90e535ef | 548 | LTTNG_HIDDEN |
d77dded2 JG |
549 | int utils_mkdir(const char *path, mode_t mode, int uid, int gid) |
550 | { | |
551 | int ret; | |
552 | ||
553 | if (uid < 0 || gid < 0) { | |
554 | ret = mkdir(path, mode); | |
555 | } else { | |
556 | ret = run_as_mkdir(path, mode, uid, gid); | |
557 | } | |
558 | if (ret < 0) { | |
559 | if (errno != EEXIST) { | |
560 | PERROR("mkdir %s, uid %d, gid %d", path ? path : "NULL", | |
561 | uid, gid); | |
562 | } else { | |
563 | ret = 0; | |
564 | } | |
565 | } | |
566 | ||
567 | return ret; | |
568 | } | |
569 | ||
570 | /* | |
571 | * Internal version of mkdir_recursive. Runs as the current user. | |
572 | * Don't call directly; use utils_mkdir_recursive(). | |
573 | * | |
574 | * This function is ominously marked as "unsafe" since it should only | |
575 | * be called by a caller that has transitioned to the uid and gid under which | |
576 | * the directory creation should occur. | |
577 | */ | |
578 | LTTNG_HIDDEN | |
579 | int _utils_mkdir_recursive_unsafe(const char *path, mode_t mode) | |
2d851108 DG |
580 | { |
581 | char *p, tmp[PATH_MAX]; | |
2d851108 DG |
582 | size_t len; |
583 | int ret; | |
584 | ||
585 | assert(path); | |
586 | ||
587 | ret = snprintf(tmp, sizeof(tmp), "%s", path); | |
588 | if (ret < 0) { | |
589 | PERROR("snprintf mkdir"); | |
590 | goto error; | |
591 | } | |
592 | ||
593 | len = ret; | |
594 | if (tmp[len - 1] == '/') { | |
595 | tmp[len - 1] = 0; | |
596 | } | |
597 | ||
598 | for (p = tmp + 1; *p; p++) { | |
599 | if (*p == '/') { | |
600 | *p = 0; | |
601 | if (tmp[strlen(tmp) - 1] == '.' && | |
602 | tmp[strlen(tmp) - 2] == '.' && | |
603 | tmp[strlen(tmp) - 3] == '/') { | |
604 | ERR("Using '/../' is not permitted in the trace path (%s)", | |
605 | tmp); | |
606 | ret = -1; | |
607 | goto error; | |
608 | } | |
0c7bcad5 | 609 | ret = mkdir(tmp, mode); |
2d851108 | 610 | if (ret < 0) { |
0c7bcad5 MD |
611 | if (errno != EEXIST) { |
612 | PERROR("mkdir recursive"); | |
613 | ret = -errno; | |
614 | goto error; | |
2d851108 DG |
615 | } |
616 | } | |
617 | *p = '/'; | |
618 | } | |
619 | } | |
620 | ||
621 | ret = mkdir(tmp, mode); | |
622 | if (ret < 0) { | |
623 | if (errno != EEXIST) { | |
d77dded2 | 624 | PERROR("mkdir recursive last element"); |
2d851108 DG |
625 | ret = -errno; |
626 | } else { | |
627 | ret = 0; | |
628 | } | |
629 | } | |
630 | ||
631 | error: | |
632 | return ret; | |
633 | } | |
fe4477ee | 634 | |
d77dded2 JG |
635 | /* |
636 | * Recursively create directory using the given path and mode, under the | |
637 | * provided uid and gid. | |
638 | * | |
639 | * On success, return 0 else a negative error code. | |
640 | */ | |
641 | LTTNG_HIDDEN | |
642 | int utils_mkdir_recursive(const char *path, mode_t mode, int uid, int gid) | |
643 | { | |
644 | int ret; | |
645 | ||
646 | if (uid < 0 || gid < 0) { | |
647 | /* Run as current user. */ | |
648 | ret = _utils_mkdir_recursive_unsafe(path, mode); | |
649 | } else { | |
650 | ret = run_as_mkdir_recursive(path, mode, uid, gid); | |
651 | } | |
652 | if (ret < 0) { | |
653 | PERROR("mkdir %s, uid %d, gid %d", path ? path : "NULL", | |
654 | uid, gid); | |
655 | } | |
656 | ||
657 | return ret; | |
658 | } | |
659 | ||
fe4477ee | 660 | /* |
d77dded2 | 661 | * path is the output parameter. It needs to be PATH_MAX len. |
fe4477ee JD |
662 | * |
663 | * Return 0 on success or else a negative value. | |
664 | */ | |
7591bab1 MD |
665 | static int utils_stream_file_name(char *path, |
666 | const char *path_name, const char *file_name, | |
667 | uint64_t size, uint64_t count, | |
668 | const char *suffix) | |
fe4477ee | 669 | { |
7591bab1 MD |
670 | int ret; |
671 | char full_path[PATH_MAX]; | |
672 | char *path_name_suffix = NULL; | |
309167d2 | 673 | char *extra = NULL; |
fe4477ee | 674 | |
fe4477ee JD |
675 | ret = snprintf(full_path, sizeof(full_path), "%s/%s", |
676 | path_name, file_name); | |
677 | if (ret < 0) { | |
678 | PERROR("snprintf create output file"); | |
679 | goto error; | |
680 | } | |
681 | ||
309167d2 JD |
682 | /* Setup extra string if suffix or/and a count is needed. */ |
683 | if (size > 0 && suffix) { | |
684 | ret = asprintf(&extra, "_%" PRIu64 "%s", count, suffix); | |
685 | } else if (size > 0) { | |
686 | ret = asprintf(&extra, "_%" PRIu64, count); | |
687 | } else if (suffix) { | |
688 | ret = asprintf(&extra, "%s", suffix); | |
689 | } | |
690 | if (ret < 0) { | |
691 | PERROR("Allocating extra string to name"); | |
692 | goto error; | |
693 | } | |
694 | ||
fe4477ee | 695 | /* |
7591bab1 MD |
696 | * If we split the trace in multiple files, we have to add the count at |
697 | * the end of the tracefile name. | |
fe4477ee | 698 | */ |
309167d2 JD |
699 | if (extra) { |
700 | ret = asprintf(&path_name_suffix, "%s%s", full_path, extra); | |
fe4477ee | 701 | if (ret < 0) { |
309167d2 JD |
702 | PERROR("Allocating path name with extra string"); |
703 | goto error_free_suffix; | |
fe4477ee | 704 | } |
7591bab1 MD |
705 | strncpy(path, path_name_suffix, PATH_MAX - 1); |
706 | path[PATH_MAX - 1] = '\0'; | |
fe4477ee | 707 | } else { |
7591bab1 MD |
708 | strncpy(path, full_path, PATH_MAX - 1); |
709 | } | |
710 | path[PATH_MAX - 1] = '\0'; | |
711 | ret = 0; | |
712 | ||
713 | free(path_name_suffix); | |
714 | error_free_suffix: | |
715 | free(extra); | |
716 | error: | |
717 | return ret; | |
718 | } | |
719 | ||
720 | /* | |
721 | * Create the stream file on disk. | |
722 | * | |
723 | * Return 0 on success or else a negative value. | |
724 | */ | |
725 | LTTNG_HIDDEN | |
726 | int utils_create_stream_file(const char *path_name, char *file_name, uint64_t size, | |
727 | uint64_t count, int uid, int gid, char *suffix) | |
728 | { | |
729 | int ret, flags, mode; | |
730 | char path[PATH_MAX]; | |
731 | ||
732 | ret = utils_stream_file_name(path, path_name, file_name, | |
733 | size, count, suffix); | |
734 | if (ret < 0) { | |
735 | goto error; | |
fe4477ee JD |
736 | } |
737 | ||
be96a7d1 | 738 | flags = O_WRONLY | O_CREAT | O_TRUNC; |
0f907de1 | 739 | /* Open with 660 mode */ |
be96a7d1 DG |
740 | mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP; |
741 | ||
742 | if (uid < 0 || gid < 0) { | |
7591bab1 | 743 | ret = open(path, flags, mode); |
be96a7d1 | 744 | } else { |
7591bab1 | 745 | ret = run_as_open(path, flags, mode, uid, gid); |
be96a7d1 | 746 | } |
7591bab1 | 747 | if (ret < 0) { |
fe4477ee | 748 | PERROR("open stream path %s", path); |
fe4477ee | 749 | } |
7591bab1 MD |
750 | error: |
751 | return ret; | |
752 | } | |
fe4477ee | 753 | |
7591bab1 MD |
754 | /* |
755 | * Unlink the stream tracefile from disk. | |
756 | * | |
757 | * Return 0 on success or else a negative value. | |
758 | */ | |
759 | LTTNG_HIDDEN | |
760 | int utils_unlink_stream_file(const char *path_name, char *file_name, uint64_t size, | |
761 | uint64_t count, int uid, int gid, char *suffix) | |
762 | { | |
763 | int ret; | |
764 | char path[PATH_MAX]; | |
765 | ||
766 | ret = utils_stream_file_name(path, path_name, file_name, | |
767 | size, count, suffix); | |
768 | if (ret < 0) { | |
769 | goto error; | |
770 | } | |
771 | if (uid < 0 || gid < 0) { | |
772 | ret = unlink(path); | |
773 | } else { | |
774 | ret = run_as_unlink(path, uid, gid); | |
7591bab1 MD |
775 | } |
776 | if (ret < 0) { | |
777 | goto error; | |
778 | } | |
fe4477ee | 779 | error: |
7591bab1 | 780 | DBG("utils_unlink_stream_file %s returns %d", path, ret); |
fe4477ee JD |
781 | return ret; |
782 | } | |
783 | ||
784 | /* | |
785 | * Change the output tracefile according to the given size and count The | |
786 | * new_count pointer is set during this operation. | |
787 | * | |
788 | * From the consumer, the stream lock MUST be held before calling this function | |
789 | * because we are modifying the stream status. | |
790 | * | |
791 | * Return 0 on success or else a negative value. | |
792 | */ | |
bc182241 | 793 | LTTNG_HIDDEN |
fe4477ee | 794 | int utils_rotate_stream_file(char *path_name, char *file_name, uint64_t size, |
309167d2 JD |
795 | uint64_t count, int uid, int gid, int out_fd, uint64_t *new_count, |
796 | int *stream_fd) | |
fe4477ee JD |
797 | { |
798 | int ret; | |
799 | ||
309167d2 JD |
800 | assert(new_count); |
801 | assert(stream_fd); | |
802 | ||
fe4477ee JD |
803 | ret = close(out_fd); |
804 | if (ret < 0) { | |
805 | PERROR("Closing tracefile"); | |
806 | goto error; | |
807 | } | |
808 | ||
809 | if (count > 0) { | |
7591bab1 MD |
810 | /* |
811 | * In tracefile rotation, for the relay daemon we need | |
812 | * to unlink the old file if present, because it may | |
813 | * still be open in reading by the live thread, and we | |
814 | * need to ensure that we do not overwrite the content | |
815 | * between get_index and get_packet. Since we have no | |
816 | * way to verify integrity of the data content compared | |
817 | * to the associated index, we need to ensure the reader | |
818 | * has exclusive access to the file content, and that | |
819 | * the open of the data file is performed in get_index. | |
820 | * Unlinking the old file rather than overwriting it | |
821 | * achieves this. | |
822 | */ | |
fe4477ee | 823 | *new_count = (*new_count + 1) % count; |
7591bab1 MD |
824 | ret = utils_unlink_stream_file(path_name, file_name, |
825 | size, *new_count, uid, gid, 0); | |
826 | if (ret < 0 && errno != ENOENT) { | |
827 | goto error; | |
828 | } | |
fe4477ee JD |
829 | } else { |
830 | (*new_count)++; | |
831 | } | |
832 | ||
309167d2 JD |
833 | ret = utils_create_stream_file(path_name, file_name, size, *new_count, |
834 | uid, gid, 0); | |
835 | if (ret < 0) { | |
836 | goto error; | |
837 | } | |
838 | *stream_fd = ret; | |
839 | ||
840 | /* Success. */ | |
841 | ret = 0; | |
842 | ||
fe4477ee JD |
843 | error: |
844 | return ret; | |
845 | } | |
70d0b120 | 846 | |
70d0b120 SM |
847 | |
848 | /** | |
849 | * Parse a string that represents a size in human readable format. It | |
5983a922 | 850 | * supports decimal integers suffixed by 'k', 'K', 'M' or 'G'. |
70d0b120 SM |
851 | * |
852 | * The suffix multiply the integer by: | |
853 | * 'k': 1024 | |
854 | * 'M': 1024^2 | |
855 | * 'G': 1024^3 | |
856 | * | |
857 | * @param str The string to parse. | |
5983a922 | 858 | * @param size Pointer to a uint64_t that will be filled with the |
cfa9a5a2 | 859 | * resulting size. |
70d0b120 SM |
860 | * |
861 | * @return 0 on success, -1 on failure. | |
862 | */ | |
00a52467 | 863 | LTTNG_HIDDEN |
5983a922 | 864 | int utils_parse_size_suffix(const char * const str, uint64_t * const size) |
70d0b120 | 865 | { |
70d0b120 | 866 | int ret; |
5983a922 | 867 | uint64_t base_size; |
70d0b120 | 868 | long shift = 0; |
5983a922 SM |
869 | const char *str_end; |
870 | char *num_end; | |
70d0b120 SM |
871 | |
872 | if (!str) { | |
5983a922 | 873 | DBG("utils_parse_size_suffix: received a NULL string."); |
70d0b120 SM |
874 | ret = -1; |
875 | goto end; | |
876 | } | |
877 | ||
5983a922 SM |
878 | /* strtoull will accept a negative number, but we don't want to. */ |
879 | if (strchr(str, '-') != NULL) { | |
880 | DBG("utils_parse_size_suffix: invalid size string, should not contain '-'."); | |
70d0b120 | 881 | ret = -1; |
5983a922 | 882 | goto end; |
70d0b120 SM |
883 | } |
884 | ||
5983a922 SM |
885 | /* str_end will point to the \0 */ |
886 | str_end = str + strlen(str); | |
70d0b120 | 887 | errno = 0; |
5983a922 | 888 | base_size = strtoull(str, &num_end, 0); |
70d0b120 | 889 | if (errno != 0) { |
5983a922 | 890 | PERROR("utils_parse_size_suffix strtoull"); |
70d0b120 | 891 | ret = -1; |
5983a922 SM |
892 | goto end; |
893 | } | |
894 | ||
895 | if (num_end == str) { | |
896 | /* strtoull parsed nothing, not good. */ | |
897 | DBG("utils_parse_size_suffix: strtoull had nothing good to parse."); | |
898 | ret = -1; | |
899 | goto end; | |
900 | } | |
901 | ||
902 | /* Check if a prefix is present. */ | |
903 | switch (*num_end) { | |
904 | case 'G': | |
905 | shift = GIBI_LOG2; | |
906 | num_end++; | |
907 | break; | |
908 | case 'M': /* */ | |
909 | shift = MEBI_LOG2; | |
910 | num_end++; | |
911 | break; | |
912 | case 'K': | |
913 | case 'k': | |
914 | shift = KIBI_LOG2; | |
915 | num_end++; | |
916 | break; | |
917 | case '\0': | |
918 | break; | |
919 | default: | |
920 | DBG("utils_parse_size_suffix: invalid suffix."); | |
921 | ret = -1; | |
922 | goto end; | |
923 | } | |
924 | ||
925 | /* Check for garbage after the valid input. */ | |
926 | if (num_end != str_end) { | |
927 | DBG("utils_parse_size_suffix: Garbage after size string."); | |
928 | ret = -1; | |
929 | goto end; | |
70d0b120 SM |
930 | } |
931 | ||
932 | *size = base_size << shift; | |
933 | ||
934 | /* Check for overflow */ | |
935 | if ((*size >> shift) != base_size) { | |
5983a922 | 936 | DBG("utils_parse_size_suffix: oops, overflow detected."); |
70d0b120 | 937 | ret = -1; |
5983a922 | 938 | goto end; |
70d0b120 SM |
939 | } |
940 | ||
941 | ret = 0; | |
70d0b120 SM |
942 | end: |
943 | return ret; | |
944 | } | |
cfa9a5a2 DG |
945 | |
946 | /* | |
947 | * fls: returns the position of the most significant bit. | |
948 | * Returns 0 if no bit is set, else returns the position of the most | |
949 | * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit). | |
950 | */ | |
951 | #if defined(__i386) || defined(__x86_64) | |
952 | static inline unsigned int fls_u32(uint32_t x) | |
953 | { | |
954 | int r; | |
955 | ||
956 | asm("bsrl %1,%0\n\t" | |
957 | "jnz 1f\n\t" | |
958 | "movl $-1,%0\n\t" | |
959 | "1:\n\t" | |
960 | : "=r" (r) : "rm" (x)); | |
961 | return r + 1; | |
962 | } | |
963 | #define HAS_FLS_U32 | |
964 | #endif | |
965 | ||
966 | #ifndef HAS_FLS_U32 | |
967 | static __attribute__((unused)) unsigned int fls_u32(uint32_t x) | |
968 | { | |
969 | unsigned int r = 32; | |
970 | ||
971 | if (!x) { | |
972 | return 0; | |
973 | } | |
974 | if (!(x & 0xFFFF0000U)) { | |
975 | x <<= 16; | |
976 | r -= 16; | |
977 | } | |
978 | if (!(x & 0xFF000000U)) { | |
979 | x <<= 8; | |
980 | r -= 8; | |
981 | } | |
982 | if (!(x & 0xF0000000U)) { | |
983 | x <<= 4; | |
984 | r -= 4; | |
985 | } | |
986 | if (!(x & 0xC0000000U)) { | |
987 | x <<= 2; | |
988 | r -= 2; | |
989 | } | |
990 | if (!(x & 0x80000000U)) { | |
991 | x <<= 1; | |
992 | r -= 1; | |
993 | } | |
994 | return r; | |
995 | } | |
996 | #endif | |
997 | ||
998 | /* | |
999 | * Return the minimum order for which x <= (1UL << order). | |
1000 | * Return -1 if x is 0. | |
1001 | */ | |
1002 | LTTNG_HIDDEN | |
1003 | int utils_get_count_order_u32(uint32_t x) | |
1004 | { | |
1005 | if (!x) { | |
1006 | return -1; | |
1007 | } | |
1008 | ||
1009 | return fls_u32(x - 1); | |
1010 | } | |
feb0f3e5 AM |
1011 | |
1012 | /** | |
1013 | * Obtain the value of LTTNG_HOME environment variable, if exists. | |
1014 | * Otherwise returns the value of HOME. | |
1015 | */ | |
00a52467 | 1016 | LTTNG_HIDDEN |
feb0f3e5 AM |
1017 | char *utils_get_home_dir(void) |
1018 | { | |
1019 | char *val = NULL; | |
04135dbd DG |
1020 | struct passwd *pwd; |
1021 | ||
e8fa9fb0 | 1022 | val = lttng_secure_getenv(DEFAULT_LTTNG_HOME_ENV_VAR); |
feb0f3e5 | 1023 | if (val != NULL) { |
04135dbd DG |
1024 | goto end; |
1025 | } | |
e8fa9fb0 | 1026 | val = lttng_secure_getenv(DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR); |
04135dbd DG |
1027 | if (val != NULL) { |
1028 | goto end; | |
feb0f3e5 | 1029 | } |
04135dbd DG |
1030 | |
1031 | /* Fallback on the password file entry. */ | |
1032 | pwd = getpwuid(getuid()); | |
1033 | if (!pwd) { | |
1034 | goto end; | |
1035 | } | |
1036 | val = pwd->pw_dir; | |
1037 | ||
1038 | DBG3("Home directory is '%s'", val); | |
1039 | ||
1040 | end: | |
1041 | return val; | |
feb0f3e5 | 1042 | } |
26fe5938 | 1043 | |
fb198a11 JG |
1044 | /** |
1045 | * Get user's home directory. Dynamically allocated, must be freed | |
1046 | * by the caller. | |
1047 | */ | |
1048 | LTTNG_HIDDEN | |
1049 | char *utils_get_user_home_dir(uid_t uid) | |
1050 | { | |
1051 | struct passwd pwd; | |
1052 | struct passwd *result; | |
1053 | char *home_dir = NULL; | |
1054 | char *buf = NULL; | |
1055 | long buflen; | |
1056 | int ret; | |
1057 | ||
1058 | buflen = sysconf(_SC_GETPW_R_SIZE_MAX); | |
1059 | if (buflen == -1) { | |
1060 | goto end; | |
1061 | } | |
1062 | retry: | |
1063 | buf = zmalloc(buflen); | |
1064 | if (!buf) { | |
1065 | goto end; | |
1066 | } | |
1067 | ||
1068 | ret = getpwuid_r(uid, &pwd, buf, buflen, &result); | |
1069 | if (ret || !result) { | |
1070 | if (ret == ERANGE) { | |
1071 | free(buf); | |
1072 | buflen *= 2; | |
1073 | goto retry; | |
1074 | } | |
1075 | goto end; | |
1076 | } | |
1077 | ||
1078 | home_dir = strdup(pwd.pw_dir); | |
1079 | end: | |
1080 | free(buf); | |
1081 | return home_dir; | |
1082 | } | |
1083 | ||
fbb9748b JG |
1084 | /* |
1085 | * Obtain the value of LTTNG_KMOD_PROBES environment variable, if exists. | |
c9d42407 | 1086 | * Otherwise returns NULL. |
fbb9748b JG |
1087 | */ |
1088 | LTTNG_HIDDEN | |
1089 | char *utils_get_kmod_probes_list(void) | |
1090 | { | |
e8fa9fb0 | 1091 | return lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES); |
fbb9748b JG |
1092 | } |
1093 | ||
c9d42407 PP |
1094 | /* |
1095 | * Obtain the value of LTTNG_EXTRA_KMOD_PROBES environment variable, if | |
1096 | * exists. Otherwise returns NULL. | |
1097 | */ | |
1098 | LTTNG_HIDDEN | |
1099 | char *utils_get_extra_kmod_probes_list(void) | |
1100 | { | |
e8fa9fb0 | 1101 | return lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES); |
c9d42407 PP |
1102 | } |
1103 | ||
26fe5938 DG |
1104 | /* |
1105 | * With the given format, fill dst with the time of len maximum siz. | |
1106 | * | |
1107 | * Return amount of bytes set in the buffer or else 0 on error. | |
1108 | */ | |
1109 | LTTNG_HIDDEN | |
1110 | size_t utils_get_current_time_str(const char *format, char *dst, size_t len) | |
1111 | { | |
1112 | size_t ret; | |
1113 | time_t rawtime; | |
1114 | struct tm *timeinfo; | |
1115 | ||
1116 | assert(format); | |
1117 | assert(dst); | |
1118 | ||
1119 | /* Get date and time for session path */ | |
1120 | time(&rawtime); | |
1121 | timeinfo = localtime(&rawtime); | |
1122 | ret = strftime(dst, len, format, timeinfo); | |
1123 | if (ret == 0) { | |
68e6efdd | 1124 | ERR("Unable to strftime with format %s at dst %p of len %zu", format, |
26fe5938 DG |
1125 | dst, len); |
1126 | } | |
1127 | ||
1128 | return ret; | |
1129 | } | |
6c71277b MD |
1130 | |
1131 | /* | |
1132 | * Return the group ID matching name, else 0 if it cannot be found. | |
1133 | */ | |
1134 | LTTNG_HIDDEN | |
1135 | gid_t utils_get_group_id(const char *name) | |
1136 | { | |
1137 | struct group *grp; | |
1138 | ||
1139 | grp = getgrnam(name); | |
1140 | if (!grp) { | |
1141 | static volatile int warn_once; | |
1142 | ||
1143 | if (!warn_once) { | |
1144 | WARN("No tracing group detected"); | |
1145 | warn_once = 1; | |
1146 | } | |
1147 | return 0; | |
1148 | } | |
1149 | return grp->gr_gid; | |
1150 | } | |
8db0dc00 JG |
1151 | |
1152 | /* | |
1153 | * Return a newly allocated option string. This string is to be used as the | |
1154 | * optstring argument of getopt_long(), see GETOPT(3). opt_count is the number | |
1155 | * of elements in the long_options array. Returns NULL if the string's | |
1156 | * allocation fails. | |
1157 | */ | |
1158 | LTTNG_HIDDEN | |
1159 | char *utils_generate_optstring(const struct option *long_options, | |
1160 | size_t opt_count) | |
1161 | { | |
1162 | int i; | |
1163 | size_t string_len = opt_count, str_pos = 0; | |
1164 | char *optstring; | |
1165 | ||
1166 | /* | |
1167 | * Compute the necessary string length. One letter per option, two when an | |
1168 | * argument is necessary, and a trailing NULL. | |
1169 | */ | |
1170 | for (i = 0; i < opt_count; i++) { | |
1171 | string_len += long_options[i].has_arg ? 1 : 0; | |
1172 | } | |
1173 | ||
1174 | optstring = zmalloc(string_len); | |
1175 | if (!optstring) { | |
1176 | goto end; | |
1177 | } | |
1178 | ||
1179 | for (i = 0; i < opt_count; i++) { | |
1180 | if (!long_options[i].name) { | |
1181 | /* Got to the trailing NULL element */ | |
1182 | break; | |
1183 | } | |
1184 | ||
a596dcb9 JG |
1185 | if (long_options[i].val != '\0') { |
1186 | optstring[str_pos++] = (char) long_options[i].val; | |
1187 | if (long_options[i].has_arg) { | |
1188 | optstring[str_pos++] = ':'; | |
1189 | } | |
8db0dc00 JG |
1190 | } |
1191 | } | |
1192 | ||
1193 | end: | |
1194 | return optstring; | |
1195 | } | |
3d071855 MD |
1196 | |
1197 | /* | |
1198 | * Try to remove a hierarchy of empty directories, recursively. Don't unlink | |
9529ec1b | 1199 | * any file. Try to rmdir any empty directory within the hierarchy. |
3d071855 MD |
1200 | */ |
1201 | LTTNG_HIDDEN | |
1202 | int utils_recursive_rmdir(const char *path) | |
1203 | { | |
1204 | DIR *dir; | |
7a946beb | 1205 | size_t path_len; |
9529ec1b | 1206 | int dir_fd, ret = 0, closeret, is_empty = 1; |
3d071855 MD |
1207 | struct dirent *entry; |
1208 | ||
1209 | /* Open directory */ | |
1210 | dir = opendir(path); | |
1211 | if (!dir) { | |
1212 | PERROR("Cannot open '%s' path", path); | |
1213 | return -1; | |
1214 | } | |
5a2451c9 | 1215 | dir_fd = lttng_dirfd(dir); |
3d071855 | 1216 | if (dir_fd < 0) { |
5a2451c9 | 1217 | PERROR("lttng_dirfd"); |
3d071855 MD |
1218 | return -1; |
1219 | } | |
1220 | ||
7a946beb | 1221 | path_len = strlen(path); |
3d071855 MD |
1222 | while ((entry = readdir(dir))) { |
1223 | if (!strcmp(entry->d_name, ".") | |
1224 | || !strcmp(entry->d_name, "..")) | |
1225 | continue; | |
7a946beb MJ |
1226 | |
1227 | struct stat st; | |
1228 | size_t name_len; | |
1229 | char filename[PATH_MAX]; | |
1230 | ||
1231 | name_len = strlen(entry->d_name); | |
1232 | if (path_len + name_len + 2 > sizeof(filename)) { | |
1233 | ERR("Failed to remove file: path name too long (%s/%s)", | |
1234 | path, entry->d_name); | |
1235 | continue; | |
1236 | } | |
1237 | if (snprintf(filename, sizeof(filename), "%s/%s", | |
1238 | path, entry->d_name) < 0) { | |
1239 | ERR("Failed to format path."); | |
1240 | continue; | |
1241 | } | |
1242 | ||
1243 | if (stat(filename, &st)) { | |
1244 | PERROR("stat"); | |
1245 | continue; | |
1246 | } | |
1247 | ||
1248 | if (S_ISDIR(st.st_mode)) { | |
3d071855 MD |
1249 | char subpath[PATH_MAX]; |
1250 | ||
1251 | strncpy(subpath, path, PATH_MAX); | |
1252 | subpath[PATH_MAX - 1] = '\0'; | |
1253 | strncat(subpath, "/", | |
1254 | PATH_MAX - strlen(subpath) - 1); | |
1255 | strncat(subpath, entry->d_name, | |
1256 | PATH_MAX - strlen(subpath) - 1); | |
9529ec1b MD |
1257 | if (utils_recursive_rmdir(subpath)) { |
1258 | is_empty = 0; | |
3d071855 | 1259 | } |
7a946beb | 1260 | } else if (S_ISREG(st.st_mode)) { |
9529ec1b | 1261 | is_empty = 0; |
7a946beb | 1262 | } else { |
3d071855 MD |
1263 | ret = -EINVAL; |
1264 | goto end; | |
1265 | } | |
1266 | } | |
1267 | end: | |
1268 | closeret = closedir(dir); | |
1269 | if (closeret) { | |
1270 | PERROR("closedir"); | |
1271 | } | |
9529ec1b | 1272 | if (is_empty) { |
3d071855 MD |
1273 | DBG3("Attempting rmdir %s", path); |
1274 | ret = rmdir(path); | |
1275 | } | |
1276 | return ret; | |
1277 | } |