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Commit | Line | Data |
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d115ee9b KZ |
1 | /* |
2 | * Copyright (C) 2008-2009 Karel Zak <kzak@redhat.com> | |
3 | * | |
4 | * This file may be redistributed under the terms of the | |
5 | * GNU Lesser General Public License. | |
d115ee9b KZ |
6 | */ |
7 | ||
192c6aad KZ |
8 | /** |
9 | * SECTION: fs | |
10 | * @title: Filesystem | |
68164f6c | 11 | * @short_description: struct libmnt_fs represents one entry in fstab/mtab/mountinfo |
192c6aad KZ |
12 | * |
13 | */ | |
d115ee9b KZ |
14 | #include <stdio.h> |
15 | #include <string.h> | |
16 | #include <stdlib.h> | |
17 | #include <ctype.h> | |
3fca8422 | 18 | #include <errno.h> |
8e368761 | 19 | #include <blkid.h> |
9ecdf48f | 20 | #include <stddef.h> |
d115ee9b KZ |
21 | |
22 | #include "nls.h" | |
23 | #include "mountP.h" | |
24 | ||
25 | /** | |
26 | * mnt_new_fs: | |
27 | * | |
68164f6c | 28 | * Returns: newly allocated struct libmnt_fs. |
d115ee9b | 29 | */ |
68164f6c | 30 | struct libmnt_fs *mnt_new_fs(void) |
d115ee9b | 31 | { |
68164f6c | 32 | struct libmnt_fs *fs = calloc(1, sizeof(*fs)); |
d115ee9b KZ |
33 | if (!fs) |
34 | return NULL; | |
35 | ||
309139c7 | 36 | /*DBG(FS, mnt_debug_h(fs, "alloc"));*/ |
d115ee9b KZ |
37 | INIT_LIST_HEAD(&fs->ents); |
38 | return fs; | |
39 | } | |
40 | ||
41 | /** | |
42 | * mnt_free_fs: | |
43 | * @fs: fs pointer | |
44 | * | |
45 | * Deallocates the fs. | |
46 | */ | |
68164f6c | 47 | void mnt_free_fs(struct libmnt_fs *fs) |
d115ee9b KZ |
48 | { |
49 | if (!fs) | |
50 | return; | |
51 | list_del(&fs->ents); | |
52 | ||
309139c7 KZ |
53 | /*DBG(FS, mnt_debug_h(fs, "free"));*/ |
54 | ||
d115ee9b | 55 | free(fs->source); |
dd369652 | 56 | free(fs->bindsrc); |
d115ee9b KZ |
57 | free(fs->tagname); |
58 | free(fs->tagval); | |
0b3953a3 | 59 | free(fs->root); |
d115ee9b KZ |
60 | free(fs->target); |
61 | free(fs->fstype); | |
f2b3a3a3 | 62 | free(fs->optstr); |
d115ee9b KZ |
63 | free(fs->vfs_optstr); |
64 | free(fs->fs_optstr); | |
76a06ca4 KZ |
65 | free(fs->user_optstr); |
66 | free(fs->attrs); | |
d115ee9b KZ |
67 | |
68 | free(fs); | |
69 | } | |
70 | ||
309139c7 KZ |
71 | /** |
72 | * mnt_reset_fs: | |
73 | * @fs: fs pointer | |
74 | * | |
75 | * Resets (zeroize) @fs. | |
76 | */ | |
77 | void mnt_reset_fs(struct libmnt_fs *fs) | |
78 | { | |
79 | if (fs) | |
80 | memset(fs, 0, sizeof(*fs)); | |
81 | } | |
82 | ||
83 | static inline int update_str(char **dest, const char *src) | |
9ecdf48f | 84 | { |
8b95253f KZ |
85 | size_t sz; |
86 | char *x; | |
87 | ||
88 | assert(dest); | |
9ecdf48f | 89 | |
8b95253f KZ |
90 | if (!src) { |
91 | free(*dest); | |
92 | *dest = NULL; | |
9ecdf48f | 93 | return 0; /* source (old) is empty */ |
8b95253f | 94 | } |
9ecdf48f | 95 | |
8b95253f KZ |
96 | sz = strlen(src) + 1; |
97 | x = realloc(*dest, sz); | |
98 | if (!x) | |
56be757f | 99 | return -ENOMEM; |
8b95253f KZ |
100 | *dest = x; |
101 | memcpy(*dest, src, sz); | |
9ecdf48f KZ |
102 | return 0; |
103 | } | |
104 | ||
8b95253f KZ |
105 | static inline int cpy_str_at_offset(void *new, const void *old, size_t offset) |
106 | { | |
107 | char **o = (char **) (old + offset); | |
108 | char **n = (char **) (new + offset); | |
109 | ||
309139c7 KZ |
110 | if (*n) |
111 | return 0; /* already set, not overwrite */ | |
112 | ||
113 | return update_str(n, *o); | |
8b95253f KZ |
114 | } |
115 | ||
9ecdf48f KZ |
116 | /** |
117 | * mnt_copy_fs: | |
309139c7 KZ |
118 | * @dest: destination FS |
119 | * @src: source FS | |
120 | * | |
121 | * If @dest is NULL, then a new FS is allocated, if any @dest field is already | |
122 | * set then the field is NOT overwrited. | |
9ecdf48f KZ |
123 | * |
124 | * This function does not copy userdata (se mnt_fs_set_userdata()). A new copy is | |
125 | * not linked with any existing mnt_tab. | |
126 | * | |
309139c7 | 127 | * Returns: @dest or NULL in case of error |
9ecdf48f | 128 | */ |
309139c7 KZ |
129 | struct libmnt_fs *mnt_copy_fs(struct libmnt_fs *dest, |
130 | const struct libmnt_fs *src) | |
9ecdf48f | 131 | { |
309139c7 | 132 | const struct libmnt_fs *org = dest; |
9ecdf48f | 133 | |
309139c7 KZ |
134 | if (!dest) { |
135 | dest = mnt_new_fs(); | |
136 | if (!dest) | |
137 | return NULL; | |
138 | } | |
9ecdf48f | 139 | |
309139c7 | 140 | /*DBG(FS, mnt_debug_h(dest, "copy from %p", src));*/ |
9ecdf48f | 141 | |
309139c7 KZ |
142 | dest->id = src->id; |
143 | dest->parent = src->parent; | |
144 | dest->devno = src->devno; | |
145 | ||
146 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, source))) | |
9ecdf48f | 147 | goto err; |
309139c7 | 148 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, tagname))) |
9ecdf48f | 149 | goto err; |
309139c7 | 150 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, tagval))) |
9ecdf48f | 151 | goto err; |
309139c7 | 152 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, root))) |
9ecdf48f | 153 | goto err; |
309139c7 | 154 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, target))) |
9ecdf48f | 155 | goto err; |
309139c7 | 156 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, fstype))) |
9ecdf48f | 157 | goto err; |
f2b3a3a3 KZ |
158 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, optstr))) |
159 | goto err; | |
309139c7 | 160 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, vfs_optstr))) |
9ecdf48f | 161 | goto err; |
309139c7 | 162 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, fs_optstr))) |
9ecdf48f | 163 | goto err; |
309139c7 | 164 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, user_optstr))) |
76a06ca4 | 165 | goto err; |
309139c7 | 166 | if (cpy_str_at_offset(dest, src, offsetof(struct libmnt_fs, attrs))) |
76a06ca4 KZ |
167 | goto err; |
168 | ||
309139c7 KZ |
169 | dest->freq = src->freq; |
170 | dest->passno = src->passno; | |
171 | dest->flags = src->flags; | |
9ecdf48f | 172 | |
309139c7 | 173 | return dest; |
9ecdf48f | 174 | err: |
309139c7 KZ |
175 | if (!org) |
176 | mnt_free_fs(dest); | |
9ecdf48f KZ |
177 | return NULL; |
178 | } | |
179 | ||
0f32f1e2 | 180 | /* |
f84fa6f7 KZ |
181 | * This function copies all @fs description except information that does not |
182 | * belong to /etc/mtab (e.g. VFS and userspace mount options with MNT_NOMTAB | |
183 | * mask). | |
184 | * | |
185 | * Returns: copy of @fs. | |
186 | */ | |
68164f6c | 187 | struct libmnt_fs *mnt_copy_mtab_fs(const struct libmnt_fs *fs) |
f84fa6f7 | 188 | { |
68164f6c | 189 | struct libmnt_fs *n = mnt_new_fs(); |
f84fa6f7 KZ |
190 | |
191 | if (!n) | |
192 | return NULL; | |
193 | ||
68164f6c | 194 | if (cpy_str_at_offset(n, fs, offsetof(struct libmnt_fs, source))) |
f84fa6f7 | 195 | goto err; |
68164f6c | 196 | if (cpy_str_at_offset(n, fs, offsetof(struct libmnt_fs, target))) |
f84fa6f7 | 197 | goto err; |
68164f6c | 198 | if (cpy_str_at_offset(n, fs, offsetof(struct libmnt_fs, fstype))) |
f84fa6f7 KZ |
199 | goto err; |
200 | ||
201 | if (fs->vfs_optstr) { | |
202 | char *p = NULL; | |
203 | mnt_optstr_get_options(fs->vfs_optstr, &p, | |
204 | mnt_get_builtin_optmap(MNT_LINUX_MAP), | |
205 | MNT_NOMTAB); | |
206 | n->vfs_optstr = p; | |
207 | } | |
208 | ||
209 | if (fs->user_optstr) { | |
210 | char *p = NULL; | |
211 | mnt_optstr_get_options(fs->user_optstr, &p, | |
212 | mnt_get_builtin_optmap(MNT_USERSPACE_MAP), | |
213 | MNT_NOMTAB); | |
214 | n->user_optstr = p; | |
215 | } | |
216 | ||
68164f6c | 217 | if (cpy_str_at_offset(n, fs, offsetof(struct libmnt_fs, fs_optstr))) |
f84fa6f7 KZ |
218 | goto err; |
219 | ||
f2b3a3a3 KZ |
220 | /* we cannot copy original optstr, the new optstr has to be without |
221 | * non-mtab options -- so, let's generate a new string */ | |
222 | n->optstr = mnt_fs_strdup_options(n); | |
223 | ||
f84fa6f7 KZ |
224 | n->freq = fs->freq; |
225 | n->passno = fs->passno; | |
226 | n->flags = fs->flags; | |
227 | ||
228 | return n; | |
229 | err: | |
230 | mnt_free_fs(n); | |
231 | return NULL; | |
232 | ||
233 | } | |
234 | ||
26b4f9e4 KZ |
235 | /** |
236 | * mnt_fs_get_userdata: | |
68164f6c | 237 | * @fs: struct libmnt_file instance |
26b4f9e4 | 238 | * |
192c6aad | 239 | * Returns: private data set by mnt_fs_set_userdata() or NULL. |
26b4f9e4 | 240 | */ |
68164f6c | 241 | void *mnt_fs_get_userdata(struct libmnt_fs *fs) |
26b4f9e4 KZ |
242 | { |
243 | return fs ? fs->userdata : NULL; | |
244 | } | |
245 | ||
246 | /** | |
247 | * mnt_fs_set_userdata: | |
68164f6c | 248 | * @fs: struct libmnt_file instance |
0f32f1e2 | 249 | * @data: user data |
26b4f9e4 KZ |
250 | * |
251 | * The "userdata" are library independent data. | |
252 | * | |
56be757f | 253 | * Returns: 0 or negative number in case of error (if @fs is NULL). |
26b4f9e4 | 254 | */ |
68164f6c | 255 | int mnt_fs_set_userdata(struct libmnt_fs *fs, void *data) |
26b4f9e4 KZ |
256 | { |
257 | if (!fs) | |
56be757f | 258 | return -EINVAL; |
26b4f9e4 KZ |
259 | fs->userdata = data; |
260 | return 0; | |
261 | } | |
262 | ||
d115ee9b KZ |
263 | /** |
264 | * mnt_fs_get_srcpath: | |
68164f6c | 265 | * @fs: struct libmnt_file (fstab/mtab/mountinfo) fs |
d115ee9b KZ |
266 | * |
267 | * The mount "source path" is: | |
192c6aad KZ |
268 | * - a directory for 'bind' mounts (in fstab or mtab only) |
269 | * - a device name for standard mounts | |
d115ee9b KZ |
270 | * |
271 | * See also mnt_fs_get_tag() and mnt_fs_get_source(). | |
272 | * | |
192c6aad | 273 | * Returns: mount source path or NULL in case of error or when the path |
d115ee9b | 274 | * is not defined. |
d115ee9b | 275 | */ |
68164f6c | 276 | const char *mnt_fs_get_srcpath(struct libmnt_fs *fs) |
d115ee9b KZ |
277 | { |
278 | assert(fs); | |
279 | if (!fs) | |
280 | return NULL; | |
281 | ||
282 | /* fstab-like fs */ | |
283 | if (fs->tagname) | |
284 | return NULL; /* the source contains a "NAME=value" */ | |
285 | return fs->source; | |
286 | } | |
287 | ||
288 | /** | |
3d735589 | 289 | * mnt_fs_get_source: |
68164f6c | 290 | * @fs: struct libmnt_file (fstab/mtab/mountinfo) fs |
d115ee9b | 291 | * |
192c6aad | 292 | * Returns: mount source. Note that the source could be unparsed TAG |
d115ee9b KZ |
293 | * (LABEL/UUID). See also mnt_fs_get_srcpath() and mnt_fs_get_tag(). |
294 | */ | |
68164f6c | 295 | const char *mnt_fs_get_source(struct libmnt_fs *fs) |
d115ee9b KZ |
296 | { |
297 | return fs ? fs->source : NULL; | |
298 | } | |
299 | ||
68164f6c KZ |
300 | /* Used by parser struct libmnt_file ONLY (@source has to be allocated) */ |
301 | int __mnt_fs_set_source_ptr(struct libmnt_fs *fs, char *source) | |
d115ee9b | 302 | { |
b2d0b74d KZ |
303 | char *t = NULL, *v = NULL; |
304 | ||
d115ee9b KZ |
305 | assert(fs); |
306 | ||
be1a5180 KZ |
307 | if (source && !strcmp(source, "none")) |
308 | source = NULL; | |
d115ee9b | 309 | |
be1a5180 | 310 | if (source && strchr(source, '=')) { |
b2d0b74d | 311 | if (blkid_parse_tag_string(source, &t, &v) != 0) |
d115ee9b | 312 | return -1; |
d115ee9b KZ |
313 | } |
314 | ||
b2d0b74d KZ |
315 | if (fs->source != source) |
316 | free(fs->source); | |
317 | ||
318 | free(fs->tagname); | |
319 | free(fs->tagval); | |
320 | ||
d115ee9b | 321 | fs->source = source; |
b2d0b74d KZ |
322 | fs->tagname = t; |
323 | fs->tagval = v; | |
d115ee9b KZ |
324 | return 0; |
325 | } | |
326 | ||
327 | /** | |
328 | * mnt_fs_set_source: | |
329 | * @fs: fstab/mtab/mountinfo entry | |
330 | * @source: new source | |
331 | * | |
192c6aad KZ |
332 | * This function creates a private copy (strdup()) of @source. |
333 | * | |
56be757f | 334 | * Returns: 0 on success or negative number in case of error. |
d115ee9b | 335 | */ |
68164f6c | 336 | int mnt_fs_set_source(struct libmnt_fs *fs, const char *source) |
d115ee9b | 337 | { |
f5017242 | 338 | char *p = NULL; |
b2d0b74d | 339 | int rc; |
d115ee9b | 340 | |
f5017242 | 341 | if (!fs) |
56be757f | 342 | return -EINVAL; |
f5017242 KZ |
343 | if (source) { |
344 | p = strdup(source); | |
345 | if (!p) | |
346 | return -ENOMEM; | |
347 | } | |
d115ee9b | 348 | |
b2d0b74d KZ |
349 | rc = __mnt_fs_set_source_ptr(fs, p); |
350 | if (rc) | |
351 | free(p); | |
352 | return rc; | |
d115ee9b KZ |
353 | } |
354 | ||
355 | /** | |
356 | * mnt_fs_get_tag: | |
357 | * @fs: fs | |
358 | * @name: returns pointer to NAME string | |
359 | * @value: returns pointer to VALUE string | |
360 | * | |
361 | * "TAG" is NAME=VALUE (e.g. LABEL=foo) | |
362 | * | |
192c6aad KZ |
363 | * The TAG is the first column in the fstab file. The TAG or "srcpath" has to |
364 | * be always set for all entries. | |
d115ee9b KZ |
365 | * |
366 | * See also mnt_fs_get_source(). | |
367 | * | |
192c6aad KZ |
368 | * <informalexample> |
369 | * <programlisting> | |
d115ee9b | 370 | * char *src; |
68164f6c | 371 | * struct libmnt_fs *fs = mnt_table_find_target(tb, "/home", MNT_ITER_FORWARD); |
d115ee9b KZ |
372 | * |
373 | * if (!fs) | |
374 | * goto err; | |
375 | * | |
376 | * src = mnt_fs_get_srcpath(fs); | |
377 | * if (!src) { | |
378 | * char *tag, *val; | |
379 | * if (mnt_fs_get_tag(fs, &tag, &val) == 0) | |
380 | * printf("%s: %s\n", tag, val); // LABEL or UUID | |
381 | * } else | |
382 | * printf("device: %s\n", src); // device or bind path | |
192c6aad KZ |
383 | * </programlisting> |
384 | * </informalexample> | |
d115ee9b | 385 | * |
56be757f | 386 | * Returns: 0 on success or negative number in case that a TAG is not defined. |
d115ee9b | 387 | */ |
68164f6c | 388 | int mnt_fs_get_tag(struct libmnt_fs *fs, const char **name, const char **value) |
d115ee9b KZ |
389 | { |
390 | if (fs == NULL || !fs->tagname) | |
56be757f | 391 | return -EINVAL; |
d115ee9b KZ |
392 | if (name) |
393 | *name = fs->tagname; | |
394 | if (value) | |
395 | *value = fs->tagval; | |
396 | return 0; | |
397 | } | |
398 | ||
399 | /** | |
400 | * mnt_fs_get_target: | |
401 | * @fs: fstab/mtab/mountinfo entry pointer | |
402 | * | |
192c6aad | 403 | * Returns: pointer to mountpoint path or NULL |
d115ee9b | 404 | */ |
68164f6c | 405 | const char *mnt_fs_get_target(struct libmnt_fs *fs) |
d115ee9b KZ |
406 | { |
407 | assert(fs); | |
408 | return fs ? fs->target : NULL; | |
409 | } | |
410 | ||
411 | /** | |
412 | * mnt_fs_set_target: | |
413 | * @fs: fstab/mtab/mountinfo entry | |
414 | * @target: mountpoint | |
415 | * | |
192c6aad KZ |
416 | * This function creates a private copy (strdup()) of @target. |
417 | * | |
56be757f | 418 | * Returns: 0 on success or negative number in case of error. |
d115ee9b | 419 | */ |
68164f6c | 420 | int mnt_fs_set_target(struct libmnt_fs *fs, const char *target) |
d115ee9b | 421 | { |
f5017242 | 422 | char *p = NULL; |
d115ee9b KZ |
423 | |
424 | assert(fs); | |
425 | ||
f5017242 | 426 | if (!fs) |
56be757f | 427 | return -EINVAL; |
f5017242 KZ |
428 | if (target) { |
429 | p = strdup(target); | |
430 | if (!p) | |
431 | return -ENOMEM; | |
432 | } | |
d115ee9b KZ |
433 | free(fs->target); |
434 | fs->target = p; | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
309139c7 KZ |
439 | int __mnt_fs_get_flags(struct libmnt_fs *fs) |
440 | { | |
441 | return fs ? fs->flags : 0; | |
442 | } | |
443 | ||
444 | int __mnt_fs_set_flags(struct libmnt_fs *fs, int flags) | |
445 | { | |
446 | if (fs) { | |
447 | fs->flags = flags; | |
448 | return 0; | |
449 | } | |
450 | return -EINVAL; | |
451 | } | |
452 | ||
453 | /** | |
454 | * mnt_fs_is_kernel: | |
455 | * @fs: filesystem | |
456 | * | |
457 | * Returns: 1 if the filesystem description is read from kernel e.g. /proc/mounts. | |
458 | */ | |
459 | int mnt_fs_is_kernel(struct libmnt_fs *fs) | |
460 | { | |
461 | return __mnt_fs_get_flags(fs) & MNT_FS_KERNEL; | |
462 | } | |
463 | ||
d115ee9b KZ |
464 | /** |
465 | * mnt_fs_get_fstype: | |
466 | * @fs: fstab/mtab/mountinfo entry pointer | |
467 | * | |
192c6aad | 468 | * Returns: pointer to filesystem type. |
d115ee9b | 469 | */ |
68164f6c | 470 | const char *mnt_fs_get_fstype(struct libmnt_fs *fs) |
d115ee9b KZ |
471 | { |
472 | assert(fs); | |
473 | return fs ? fs->fstype : NULL; | |
474 | } | |
475 | ||
68164f6c KZ |
476 | /* Used by struct libmnt_file parser only */ |
477 | int __mnt_fs_set_fstype_ptr(struct libmnt_fs *fs, char *fstype) | |
d115ee9b KZ |
478 | { |
479 | assert(fs); | |
480 | ||
b2d0b74d KZ |
481 | if (fstype != fs->fstype) |
482 | free(fs->fstype); | |
483 | ||
d115ee9b KZ |
484 | fs->fstype = fstype; |
485 | fs->flags &= ~MNT_FS_PSEUDO; | |
486 | fs->flags &= ~MNT_FS_NET; | |
487 | ||
488 | /* save info about pseudo filesystems */ | |
8485e709 KZ |
489 | if (fs->fstype) { |
490 | if (mnt_fstype_is_pseudofs(fs->fstype)) | |
491 | fs->flags |= MNT_FS_PSEUDO; | |
492 | else if (mnt_fstype_is_netfs(fs->fstype)) | |
493 | fs->flags |= MNT_FS_NET; | |
494 | else if (!strcmp(fs->fstype, "swap")) | |
495 | fs->flags |= MNT_FS_SWAP; | |
496 | } | |
d115ee9b KZ |
497 | return 0; |
498 | } | |
499 | ||
500 | /** | |
501 | * mnt_fs_set_fstype: | |
502 | * @fs: fstab/mtab/mountinfo entry | |
503 | * @fstype: filesystem type | |
504 | * | |
192c6aad KZ |
505 | * This function creates a private copy (strdup()) of @fstype. |
506 | * | |
56be757f | 507 | * Returns: 0 on success or negative number in case of error. |
d115ee9b | 508 | */ |
68164f6c | 509 | int mnt_fs_set_fstype(struct libmnt_fs *fs, const char *fstype) |
d115ee9b | 510 | { |
8485e709 | 511 | char *p = NULL; |
d115ee9b | 512 | |
8485e709 | 513 | if (!fs) |
56be757f | 514 | return -EINVAL; |
8485e709 KZ |
515 | if (fstype) { |
516 | p = strdup(fstype); | |
517 | if (!p) | |
518 | return -ENOMEM; | |
519 | } | |
f5017242 | 520 | return __mnt_fs_set_fstype_ptr(fs, p); |
d115ee9b KZ |
521 | } |
522 | ||
76a06ca4 KZ |
523 | /* |
524 | * Merges @vfs and @fs options strings into a new string. | |
525 | * This function cares about 'ro/rw' options. The 'ro' is | |
526 | * always used if @vfs or @fs is read-only. | |
527 | * For example: | |
528 | * | |
529 | * mnt_merge_optstr("rw,noexec", "ro,journal=update") | |
530 | * | |
531 | * returns: "ro,noexec,journal=update" | |
532 | * | |
533 | * mnt_merge_optstr("rw,noexec", "rw,journal=update") | |
534 | * | |
535 | * returns: "rw,noexec,journal=update" | |
536 | */ | |
537 | static char *merge_optstr(const char *vfs, const char *fs) | |
538 | { | |
539 | char *res, *p; | |
540 | size_t sz; | |
541 | int ro = 0, rw = 0; | |
542 | ||
543 | if (!vfs && !fs) | |
544 | return NULL; | |
545 | if (!vfs || !fs) | |
546 | return strdup(fs ? fs : vfs); | |
547 | if (!strcmp(vfs, fs)) | |
548 | return strdup(vfs); /* e.g. "aaa" and "aaa" */ | |
549 | ||
550 | /* leave space for leading "r[ow],", "," and trailing zero */ | |
551 | sz = strlen(vfs) + strlen(fs) + 5; | |
552 | res = malloc(sz); | |
553 | if (!res) | |
554 | return NULL; | |
555 | p = res + 3; /* make a room for rw/ro flag */ | |
556 | ||
557 | snprintf(p, sz - 3, "%s,%s", vfs, fs); | |
558 | ||
559 | /* remove 'rw' flags */ | |
560 | rw += !mnt_optstr_remove_option(&p, "rw"); /* from vfs */ | |
561 | rw += !mnt_optstr_remove_option(&p, "rw"); /* from fs */ | |
562 | ||
563 | /* remove 'ro' flags if necessary */ | |
564 | if (rw != 2) { | |
565 | ro += !mnt_optstr_remove_option(&p, "ro"); | |
566 | if (ro + rw < 2) | |
567 | ro += !mnt_optstr_remove_option(&p, "ro"); | |
568 | } | |
569 | ||
570 | if (!strlen(p)) | |
571 | memcpy(res, ro ? "ro" : "rw", 3); | |
572 | else | |
573 | memcpy(res, ro ? "ro," : "rw,", 3); | |
574 | return res; | |
575 | } | |
576 | ||
d115ee9b | 577 | /** |
76a06ca4 | 578 | * mnt_fs_strdup_options: |
d115ee9b KZ |
579 | * @fs: fstab/mtab/mountinfo entry pointer |
580 | * | |
76a06ca4 KZ |
581 | * Merges all mount options (VFS, FS and userspace) to the one options string |
582 | * and returns the result. This function does not modigy @fs. | |
583 | * | |
584 | * Returns: pointer to string (can be freed by free(3)) or NULL in case of error. | |
d115ee9b | 585 | */ |
68164f6c | 586 | char *mnt_fs_strdup_options(struct libmnt_fs *fs) |
d115ee9b | 587 | { |
76a06ca4 KZ |
588 | char *res; |
589 | ||
d115ee9b | 590 | assert(fs); |
76a06ca4 KZ |
591 | |
592 | errno = 0; | |
f2b3a3a3 KZ |
593 | |
594 | if (fs->optstr) | |
595 | return strdup(fs->optstr); | |
596 | ||
76a06ca4 | 597 | res = merge_optstr(fs->vfs_optstr, fs->fs_optstr); |
87a07a4c | 598 | if (!res && errno) |
76a06ca4 KZ |
599 | return NULL; |
600 | if (fs->user_optstr) { | |
601 | if (mnt_optstr_append_option(&res, fs->user_optstr, NULL)) { | |
602 | free(res); | |
603 | res = NULL; | |
604 | } | |
605 | } | |
606 | return res; | |
d115ee9b KZ |
607 | } |
608 | ||
f2b3a3a3 KZ |
609 | /** |
610 | * mnt_fs_get_options: | |
611 | * @fs: fstab/mtab/mountinfo entry pointer | |
612 | * | |
613 | * Returns: pointer to string or NULL in case of error. | |
614 | */ | |
615 | const char *mnt_fs_get_options(struct libmnt_fs *fs) | |
616 | { | |
617 | assert(fs); | |
618 | return fs ? fs->optstr : NULL; | |
619 | } | |
620 | ||
621 | ||
76a06ca4 KZ |
622 | /** |
623 | * mnt_fs_set_options: | |
624 | * @fs: fstab/mtab/mountinfo entry pointer | |
0f32f1e2 | 625 | * @optstr: options string |
76a06ca4 KZ |
626 | * |
627 | * Splits @optstr to VFS, FS and userspace mount options and update relevat | |
628 | * parts of @fs. | |
629 | * | |
630 | * Returns: 0 on success, or negative number icase of error. | |
631 | */ | |
68164f6c | 632 | int mnt_fs_set_options(struct libmnt_fs *fs, const char *optstr) |
d115ee9b | 633 | { |
f2b3a3a3 | 634 | char *v = NULL, *f = NULL, *u = NULL, *n = NULL; |
192c6aad | 635 | |
d115ee9b KZ |
636 | assert(fs); |
637 | ||
be1a5180 | 638 | if (!fs) |
56be757f | 639 | return -EINVAL; |
76a06ca4 KZ |
640 | if (optstr) { |
641 | int rc = mnt_split_optstr(optstr, &u, &v, &f, 0, 0); | |
56be757f KZ |
642 | if (rc) |
643 | return rc; | |
f2b3a3a3 KZ |
644 | n = strdup(optstr); |
645 | if (!n) | |
646 | return -ENOMEM; | |
3661b841 | 647 | } |
192c6aad | 648 | |
d115ee9b KZ |
649 | free(fs->fs_optstr); |
650 | free(fs->vfs_optstr); | |
76a06ca4 | 651 | free(fs->user_optstr); |
f2b3a3a3 | 652 | free(fs->optstr); |
d6fead1e | 653 | |
3661b841 KZ |
654 | fs->fs_optstr = f; |
655 | fs->vfs_optstr = v; | |
76a06ca4 | 656 | fs->user_optstr = u; |
f2b3a3a3 KZ |
657 | fs->optstr = n; |
658 | ||
192c6aad | 659 | return 0; |
d115ee9b KZ |
660 | } |
661 | ||
76a06ca4 KZ |
662 | /** |
663 | * mnt_fs_append_options: | |
664 | * @fs: fstab/mtab/mountinfo entry | |
665 | * @optstr: mount options | |
666 | * | |
667 | * Parses (splits) @optstr and appends results to VFS, FS and userspace lists | |
668 | * of options. | |
669 | * | |
670 | * If @optstr is NULL then @fs is not modified and 0 is returned. | |
671 | * | |
672 | * Returns: 0 on success or negative number in case of error. | |
673 | */ | |
68164f6c | 674 | int mnt_fs_append_options(struct libmnt_fs *fs, const char *optstr) |
b2d0b74d | 675 | { |
76a06ca4 | 676 | char *v = NULL, *f = NULL, *u = NULL; |
b2d0b74d KZ |
677 | int rc; |
678 | ||
679 | assert(fs); | |
680 | ||
76a06ca4 KZ |
681 | if (!fs) |
682 | return -EINVAL; | |
683 | if (!optstr) | |
684 | return 0; | |
685 | ||
686 | rc = mnt_split_optstr((char *) optstr, &u, &v, &f, 0, 0); | |
687 | if (!rc && v) | |
688 | rc = mnt_optstr_append_option(&fs->vfs_optstr, v, NULL); | |
689 | if (!rc && f) | |
f2b3a3a3 | 690 | rc = mnt_optstr_append_option(&fs->fs_optstr, f, NULL); |
76a06ca4 | 691 | if (!rc && u) |
f2b3a3a3 KZ |
692 | rc = mnt_optstr_append_option(&fs->user_optstr, u, NULL); |
693 | if (!rc) | |
694 | rc = mnt_optstr_append_option(&fs->optstr, optstr, NULL); | |
695 | ||
696 | free(v); | |
697 | free(f); | |
698 | free(u); | |
76a06ca4 | 699 | |
b2d0b74d KZ |
700 | return rc; |
701 | } | |
702 | ||
3661b841 | 703 | /** |
76a06ca4 KZ |
704 | * mnt_fs_prepend_options: |
705 | * @fs: fstab/mtab/mountinfo entry | |
706 | * @optstr: mount options | |
707 | * | |
708 | * Parses (splits) @optstr and prepands results to VFS, FS and userspace lists | |
709 | * of options. | |
710 | * | |
711 | * If @optstr is NULL then @fs is not modified and 0 is returned. | |
712 | * | |
713 | * Returns: 0 on success or negative number in case of error. | |
714 | */ | |
68164f6c | 715 | int mnt_fs_prepend_options(struct libmnt_fs *fs, const char *optstr) |
76a06ca4 KZ |
716 | { |
717 | char *v = NULL, *f = NULL, *u = NULL; | |
718 | int rc; | |
719 | ||
720 | assert(fs); | |
721 | ||
722 | if (!fs) | |
723 | return -EINVAL; | |
724 | if (!optstr) | |
725 | return 0; | |
726 | ||
727 | rc = mnt_split_optstr((char *) optstr, &u, &v, &f, 0, 0); | |
728 | if (!rc && v) | |
729 | rc = mnt_optstr_prepend_option(&fs->vfs_optstr, v, NULL); | |
730 | if (!rc && f) | |
731 | rc = mnt_optstr_prepend_option(&fs->fs_optstr, f, NULL); | |
732 | if (!rc && u) | |
733 | rc = mnt_optstr_prepend_option(&fs->user_optstr, u, NULL); | |
f2b3a3a3 KZ |
734 | if (!rc) |
735 | rc = mnt_optstr_prepend_option(&fs->optstr, optstr, NULL); | |
736 | ||
737 | free(v); | |
738 | free(f); | |
739 | free(u); | |
76a06ca4 KZ |
740 | |
741 | return rc; | |
742 | } | |
743 | ||
744 | /* | |
745 | * mnt_fs_get_fs_options: | |
746 | * @fs: fstab/mtab/mountinfo entry pointer | |
747 | * | |
748 | * Returns: pointer to superblock (fs-depend) mount option string or NULL. | |
749 | */ | |
68164f6c | 750 | const char *mnt_fs_get_fs_options(struct libmnt_fs *fs) |
76a06ca4 KZ |
751 | { |
752 | assert(fs); | |
753 | return fs ? fs->fs_optstr : NULL; | |
754 | } | |
755 | ||
76a06ca4 KZ |
756 | /** |
757 | * mnt_fs_get_vfs_options: | |
758 | * @fs: fstab/mtab entry pointer | |
759 | * | |
760 | * Returns: pointer to fs-independent (VFS) mount option string or NULL. | |
761 | */ | |
68164f6c | 762 | const char *mnt_fs_get_vfs_options(struct libmnt_fs *fs) |
76a06ca4 | 763 | { |
569f95b7 | 764 | assert(fs); |
76a06ca4 KZ |
765 | return fs ? fs->vfs_optstr : NULL; |
766 | } | |
767 | ||
76a06ca4 | 768 | /** |
68164f6c | 769 | * mnt_fs_get_user_options: |
76a06ca4 KZ |
770 | * @fs: fstab/mtab entry pointer |
771 | * | |
772 | * Returns: pointer to userspace mount option string or NULL. | |
773 | */ | |
68164f6c | 774 | const char *mnt_fs_get_user_options(struct libmnt_fs *fs) |
76a06ca4 KZ |
775 | { |
776 | assert(fs); | |
777 | return fs ? fs->user_optstr : NULL; | |
569f95b7 KZ |
778 | } |
779 | ||
d115ee9b | 780 | /** |
76a06ca4 KZ |
781 | * mnt_fs_get_attributes: |
782 | * @fs: fstab/mtab entry pointer | |
d115ee9b | 783 | * |
76a06ca4 | 784 | * Returns: pointer to attributes string or NULL. |
d115ee9b | 785 | */ |
68164f6c | 786 | const char *mnt_fs_get_attributes(struct libmnt_fs *fs) |
d115ee9b KZ |
787 | { |
788 | assert(fs); | |
76a06ca4 | 789 | return fs ? fs->attrs : NULL; |
d115ee9b KZ |
790 | } |
791 | ||
792 | /** | |
76a06ca4 KZ |
793 | * mnt_fs_set_attributes: |
794 | * @fs: fstab/mtab/mountinfo entry | |
795 | * @optstr: options string | |
d115ee9b | 796 | * |
76a06ca4 KZ |
797 | * Sets mount attributes. The attributes are mount(2) and mount(8) independent |
798 | * options, these options are not send to kernel and are not interpreted by | |
a362ae60 | 799 | * libmount. The attributes are stored in /run/mount/utab only. |
76a06ca4 KZ |
800 | * |
801 | * The atrtributes are managed by libmount in userspace only. It's possible | |
802 | * that information stored in userspace will not be available for libmount | |
803 | * after CLONE_FS unshare. Be carefull, and don't use attributes if possible. | |
804 | * | |
805 | * Returns: 0 on success or negative number in case of error. | |
d115ee9b | 806 | */ |
68164f6c | 807 | int mnt_fs_set_attributes(struct libmnt_fs *fs, const char *optstr) |
d115ee9b | 808 | { |
76a06ca4 KZ |
809 | char *p = NULL; |
810 | ||
811 | if (!fs) | |
812 | return -EINVAL; | |
813 | if (optstr) { | |
814 | p = strdup(optstr); | |
815 | if (!p) | |
816 | return -ENOMEM; | |
817 | } | |
818 | free(fs->attrs); | |
819 | fs->attrs = p; | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | /** | |
825 | * mnt_fs_append_attributes | |
826 | * @fs: fstab/mtab/mountinfo entry | |
827 | * @optstr: options string | |
828 | * | |
829 | * Appends mount attributes. (See mnt_fs_set_attributes()). | |
830 | * | |
831 | * Returns: 0 on success or negative number in case of error. | |
832 | */ | |
68164f6c | 833 | int mnt_fs_append_attributes(struct libmnt_fs *fs, const char *optstr) |
76a06ca4 KZ |
834 | { |
835 | if (!fs) | |
836 | return -EINVAL; | |
837 | if (!optstr) | |
838 | return 0; | |
839 | return mnt_optstr_append_option(&fs->attrs, optstr, NULL); | |
840 | } | |
841 | ||
842 | /** | |
843 | * mnt_fs_prepend_attributes | |
844 | * @fs: fstab/mtab/mountinfo entry | |
845 | * @optstr: options string | |
846 | * | |
847 | * Prepends mount attributes. (See mnt_fs_set_attributes()). | |
848 | * | |
849 | * Returns: 0 on success or negative number in case of error. | |
850 | */ | |
68164f6c | 851 | int mnt_fs_prepend_attributes(struct libmnt_fs *fs, const char *optstr) |
76a06ca4 KZ |
852 | { |
853 | if (!fs) | |
854 | return -EINVAL; | |
855 | if (!optstr) | |
856 | return 0; | |
857 | return mnt_optstr_prepend_option(&fs->attrs, optstr, NULL); | |
d115ee9b KZ |
858 | } |
859 | ||
860 | ||
861 | /** | |
862 | * mnt_fs_get_freq: | |
863 | * @fs: fstab/mtab/mountinfo entry pointer | |
864 | * | |
3d735589 | 865 | * Returns: dump frequency in days. |
d115ee9b | 866 | */ |
68164f6c | 867 | int mnt_fs_get_freq(struct libmnt_fs *fs) |
d115ee9b KZ |
868 | { |
869 | assert(fs); | |
870 | return fs ? fs->freq : 0; | |
871 | } | |
872 | ||
873 | /** | |
874 | * mnt_fs_set_freq: | |
efe73c3e | 875 | * @fs: fstab/mtab entry pointer |
d115ee9b KZ |
876 | * @freq: dump frequency in days |
877 | * | |
56be757f | 878 | * Returns: 0 on success or negative number in case of error. |
d115ee9b | 879 | */ |
68164f6c | 880 | int mnt_fs_set_freq(struct libmnt_fs *fs, int freq) |
d115ee9b KZ |
881 | { |
882 | assert(fs); | |
d115ee9b | 883 | if (!fs) |
56be757f | 884 | return -EINVAL; |
d115ee9b KZ |
885 | fs->freq = freq; |
886 | return 0; | |
887 | } | |
888 | ||
889 | /** | |
890 | * mnt_fs_get_passno: | |
efe73c3e | 891 | * @fs: fstab/mtab entry pointer |
d115ee9b | 892 | * |
192c6aad | 893 | * Returns: "pass number on parallel fsck". |
d115ee9b | 894 | */ |
68164f6c | 895 | int mnt_fs_get_passno(struct libmnt_fs *fs) |
d115ee9b KZ |
896 | { |
897 | assert(fs); | |
898 | return fs ? fs->passno: 0; | |
899 | } | |
900 | ||
901 | /** | |
902 | * mnt_fs_set_passno: | |
efe73c3e | 903 | * @fs: fstab/mtab entry pointer |
d115ee9b KZ |
904 | * @passno: pass number |
905 | * | |
56be757f | 906 | * Returns: 0 on success or negative number in case of error. |
d115ee9b | 907 | */ |
68164f6c | 908 | int mnt_fs_set_passno(struct libmnt_fs *fs, int passno) |
d115ee9b KZ |
909 | { |
910 | assert(fs); | |
d115ee9b | 911 | if (!fs) |
56be757f | 912 | return -EINVAL; |
d115ee9b KZ |
913 | fs->passno = passno; |
914 | return 0; | |
915 | } | |
916 | ||
0b3953a3 KZ |
917 | /** |
918 | * mnt_fs_get_root: | |
919 | * @fs: /proc/self/mountinfo entry | |
920 | * | |
921 | * Returns: root of the mount within the filesystem or NULL | |
922 | */ | |
68164f6c | 923 | const char *mnt_fs_get_root(struct libmnt_fs *fs) |
0b3953a3 KZ |
924 | { |
925 | assert(fs); | |
926 | return fs ? fs->root : NULL; | |
927 | } | |
928 | ||
9ecdf48f KZ |
929 | /** |
930 | * mnt_fs_set_root: | |
931 | * @fs: mountinfo entry | |
932 | * @root: path | |
933 | * | |
56be757f | 934 | * Returns: 0 on success or negative number in case of error. |
9ecdf48f | 935 | */ |
68164f6c | 936 | int mnt_fs_set_root(struct libmnt_fs *fs, const char *root) |
9ecdf48f KZ |
937 | { |
938 | char *p = NULL; | |
939 | ||
940 | assert(fs); | |
941 | if (!fs) | |
56be757f | 942 | return -EINVAL; |
9ecdf48f KZ |
943 | if (root) { |
944 | p = strdup(root); | |
945 | if (!p) | |
56be757f | 946 | return -ENOMEM; |
9ecdf48f KZ |
947 | } |
948 | free(fs->root); | |
949 | fs->root = p; | |
950 | return 0; | |
951 | } | |
952 | ||
dd369652 KZ |
953 | /** |
954 | * mnt_fs_get_bindsrc: | |
a362ae60 | 955 | * @fs: /run/mount/utab entry |
dd369652 KZ |
956 | * |
957 | * Returns: full path that was used for mount(2) on MS_BIND | |
958 | */ | |
68164f6c | 959 | const char *mnt_fs_get_bindsrc(struct libmnt_fs *fs) |
dd369652 KZ |
960 | { |
961 | assert(fs); | |
962 | return fs ? fs->bindsrc : NULL; | |
963 | } | |
964 | ||
965 | /** | |
966 | * mnt_fs_set_bindsrc: | |
967 | * @fs: filesystem | |
968 | * @src: path | |
969 | * | |
970 | * Returns: 0 on success or negative number in case of error. | |
971 | */ | |
68164f6c | 972 | int mnt_fs_set_bindsrc(struct libmnt_fs *fs, const char *src) |
dd369652 KZ |
973 | { |
974 | char *p = NULL; | |
975 | ||
976 | assert(fs); | |
977 | if (!fs) | |
978 | return -EINVAL; | |
979 | if (src) { | |
980 | p = strdup(src); | |
981 | if (!p) | |
982 | return -ENOMEM; | |
983 | } | |
984 | free(fs->bindsrc); | |
985 | fs->bindsrc = p; | |
986 | return 0; | |
987 | } | |
988 | ||
efe73c3e KZ |
989 | /** |
990 | * mnt_fs_get_id: | |
991 | * @fs: /proc/self/mountinfo entry | |
992 | * | |
56be757f | 993 | * Returns: mount ID (unique identifier of the mount) or negative number in case of error. |
efe73c3e | 994 | */ |
68164f6c | 995 | int mnt_fs_get_id(struct libmnt_fs *fs) |
efe73c3e KZ |
996 | { |
997 | assert(fs); | |
56be757f | 998 | return fs ? fs->id : -EINVAL; |
efe73c3e KZ |
999 | } |
1000 | ||
1001 | /** | |
1002 | * mnt_fs_get_parent_id: | |
1003 | * @fs: /proc/self/mountinfo entry | |
1004 | * | |
56be757f | 1005 | * Returns: parent mount ID or negative number in case of error. |
efe73c3e | 1006 | */ |
68164f6c | 1007 | int mnt_fs_get_parent_id(struct libmnt_fs *fs) |
efe73c3e KZ |
1008 | { |
1009 | assert(fs); | |
56be757f | 1010 | return fs ? fs->parent : -EINVAL; |
efe73c3e KZ |
1011 | } |
1012 | ||
1013 | /** | |
1014 | * mnt_fs_get_devno: | |
0b3953a3 | 1015 | * @fs: /proc/self/mountinfo entry |
efe73c3e KZ |
1016 | * |
1017 | * Returns: value of st_dev for files on filesystem or 0 in case of error. | |
1018 | */ | |
68164f6c | 1019 | dev_t mnt_fs_get_devno(struct libmnt_fs *fs) |
efe73c3e KZ |
1020 | { |
1021 | assert(fs); | |
1022 | return fs ? fs->devno : 0; | |
1023 | } | |
1024 | ||
d115ee9b KZ |
1025 | /** |
1026 | * mnt_fs_get_option: | |
1027 | * @fs: fstab/mtab/mountinfo entry pointer | |
1028 | * @name: option name | |
1029 | * @value: returns pointer to the begin of the value (e.g. name=VALUE) or NULL | |
1030 | * @valsz: returns size of options value or 0 | |
1031 | * | |
56be757f | 1032 | * Returns: 0 on success, 1 when not found the @name or negative number in case of error. |
d115ee9b | 1033 | */ |
68164f6c | 1034 | int mnt_fs_get_option(struct libmnt_fs *fs, const char *name, |
d115ee9b KZ |
1035 | char **value, size_t *valsz) |
1036 | { | |
76a06ca4 KZ |
1037 | char rc = 1; |
1038 | ||
1039 | if (fs->fs_optstr) | |
1040 | rc = mnt_optstr_get_option(fs->fs_optstr, name, value, valsz); | |
1041 | if (rc == 1 && fs->vfs_optstr) | |
1042 | rc = mnt_optstr_get_option(fs->vfs_optstr, name, value, valsz); | |
1043 | if (rc == 1 && fs->user_optstr) | |
1044 | rc = mnt_optstr_get_option(fs->user_optstr, name, value, valsz); | |
1045 | return rc; | |
1046 | } | |
1047 | ||
1048 | /** | |
1049 | * mnt_fs_get_attribute: | |
1050 | * @fs: fstab/mtab/mountinfo entry pointer | |
1051 | * @name: option name | |
1052 | * @value: returns pointer to the begin of the value (e.g. name=VALUE) or NULL | |
1053 | * @valsz: returns size of options value or 0 | |
1054 | * | |
1055 | * Returns: 0 on success, 1 when not found the @name or negative number in case of error. | |
1056 | */ | |
68164f6c | 1057 | int mnt_fs_get_attribute(struct libmnt_fs *fs, const char *name, |
76a06ca4 KZ |
1058 | char **value, size_t *valsz) |
1059 | { | |
1060 | char rc = 1; | |
1061 | ||
1062 | if (fs->attrs) | |
1063 | rc = mnt_optstr_get_option(fs->attrs, name, value, valsz); | |
1064 | return rc; | |
d115ee9b KZ |
1065 | } |
1066 | ||
3fca8422 KZ |
1067 | /** |
1068 | * mnt_fs_match_target: | |
1069 | * @fs: filesystem | |
1070 | * @target: mountpoint path | |
1071 | * @cache: tags/paths cache or NULL | |
1072 | * | |
1073 | * Possible are three attempts: | |
1074 | * 1) compare @target with @fs->target | |
1075 | * 2) realpath(@target) with @fs->target | |
1076 | * 3) realpath(@target) with realpath(@fs->target). | |
1077 | * | |
1078 | * The 2nd and 3rd attempts are not performed when @cache is NULL. | |
1079 | * | |
192c6aad | 1080 | * Returns: 1 if @fs target is equal to @target else 0. |
3fca8422 | 1081 | */ |
68164f6c | 1082 | int mnt_fs_match_target(struct libmnt_fs *fs, const char *target, struct libmnt_cache *cache) |
3fca8422 KZ |
1083 | { |
1084 | int rc = 0; | |
1085 | ||
1086 | if (!fs || !target || !fs->target) | |
1087 | return 0; | |
1088 | ||
1089 | /* 1) native paths */ | |
1090 | rc = !strcmp(target, fs->target); | |
1091 | ||
1092 | if (!rc && cache) { | |
1093 | /* 2) - canonicalized and non-canonicalized */ | |
1094 | char *cn = mnt_resolve_path(target, cache); | |
1095 | rc = (cn && strcmp(cn, fs->target) == 0); | |
1096 | ||
1097 | /* 3) - canonicalized and canonicalized */ | |
1098 | if (!rc && cn) { | |
1099 | char *tcn = mnt_resolve_path(fs->target, cache); | |
1100 | rc = (tcn && strcmp(cn, tcn) == 0); | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | return rc; | |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * mnt_fs_match_source: | |
1109 | * @fs: filesystem | |
1110 | * @source: tag or path (device or so) | |
1111 | * @cache: tags/paths cache or NULL | |
1112 | * | |
1113 | * Possible are four attempts: | |
1114 | * 1) compare @source with @fs->source | |
1115 | * 2) compare realpath(@source) with @fs->source | |
1116 | * 3) compare realpath(@source) with realpath(@fs->source) | |
1117 | * 4) compare realpath(@source) with evaluated tag from @fs->source | |
1118 | * | |
1119 | * The 2nd, 3rd and 4th attempts are not performed when @cache is NULL. The | |
1120 | * 2nd and 3rd attempts are not performed if @fs->source is tag. | |
1121 | * | |
192c6aad | 1122 | * Returns: 1 if @fs source is equal to @source else 0. |
3fca8422 | 1123 | */ |
68164f6c | 1124 | int mnt_fs_match_source(struct libmnt_fs *fs, const char *source, struct libmnt_cache *cache) |
3fca8422 | 1125 | { |
3fca8422 KZ |
1126 | char *cn; |
1127 | const char *src, *t, *v; | |
1128 | ||
1129 | if (!fs || !source || !fs->source) | |
1130 | return 0; | |
1131 | ||
1132 | /* 1) native paths/tags */ | |
3ef87248 KZ |
1133 | if (!strcmp(source, fs->source)) |
1134 | return 1; | |
3fca8422 | 1135 | |
3ef87248 KZ |
1136 | if (!cache) |
1137 | return 0; | |
3fca8422 KZ |
1138 | if (fs->flags & (MNT_FS_NET | MNT_FS_PSEUDO)) |
1139 | return 0; | |
1140 | ||
1141 | cn = mnt_resolve_spec(source, cache); | |
1142 | if (!cn) | |
1143 | return 0; | |
1144 | ||
1145 | /* 2) canonicalized and native */ | |
1146 | src = mnt_fs_get_srcpath(fs); | |
3ef87248 KZ |
1147 | if (src && !strcmp(cn, src)) |
1148 | return 1; | |
3fca8422 KZ |
1149 | |
1150 | /* 3) canonicalized and canonicalized */ | |
3ef87248 | 1151 | if (src) { |
3fca8422 | 1152 | src = mnt_resolve_path(src, cache); |
3ef87248 KZ |
1153 | if (src && !strcmp(cn, src)) |
1154 | return 1; | |
3fca8422 | 1155 | } |
3ef87248 KZ |
1156 | if (src || mnt_fs_get_tag(fs, &t, &v)) |
1157 | /* src path does not match and tag is not defined */ | |
3fca8422 KZ |
1158 | return 0; |
1159 | ||
1160 | /* read @source's tags to the cache */ | |
ba7232a1 | 1161 | if (mnt_cache_read_tags(cache, cn) < 0) { |
3fca8422 KZ |
1162 | if (errno == EACCES) { |
1163 | /* we don't have permissions to read TAGs from | |
1164 | * @source, but can translate @fs tag to devname. | |
1165 | * | |
1166 | * (because libblkid uses udev symlinks and this is | |
1167 | * accessible for non-root uses) | |
1168 | */ | |
1169 | char *x = mnt_resolve_tag(t, v, cache); | |
1170 | if (x && !strcmp(x, cn)) | |
1171 | return 1; | |
1172 | } | |
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | /* 4) has the @source a tag that matches with tag from @fs ? */ | |
3ef87248 KZ |
1177 | if (mnt_cache_device_has_tag(cache, cn, t, v)) |
1178 | return 1; | |
3fca8422 | 1179 | |
3ef87248 | 1180 | return 0; |
3fca8422 KZ |
1181 | } |
1182 | ||
1183 | /** | |
1184 | * mnt_fs_match_fstype: | |
1185 | * @fs: filesystem | |
1186 | * @types: filesystem name or comma delimited list of filesystems | |
1187 | * | |
1188 | * For more details see mnt_match_fstype(). | |
1189 | * | |
192c6aad | 1190 | * Returns: 1 if @fs type is matching to @types else 0. The function returns |
3fca8422 KZ |
1191 | * 0 when types is NULL. |
1192 | */ | |
68164f6c | 1193 | int mnt_fs_match_fstype(struct libmnt_fs *fs, const char *types) |
3fca8422 KZ |
1194 | { |
1195 | return mnt_match_fstype(fs->fstype, types); | |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * mnt_fs_match_options: | |
1200 | * @fs: filesystem | |
1201 | * @options: comma delimited list of options (and nooptions) | |
1202 | * | |
1203 | * For more details see mnt_match_options(). | |
1204 | * | |
192c6aad | 1205 | * Returns: 1 if @fs type is matching to @options else 0. The function returns |
3fca8422 KZ |
1206 | * 0 when types is NULL. |
1207 | */ | |
68164f6c | 1208 | int mnt_fs_match_options(struct libmnt_fs *fs, const char *options) |
3fca8422 | 1209 | { |
76a06ca4 KZ |
1210 | char *o = mnt_fs_strdup_options(fs); |
1211 | int rc = 0; | |
1212 | ||
1213 | if (o) | |
1214 | rc = mnt_match_options(o, options); | |
1215 | free(o); | |
1216 | return rc; | |
3fca8422 KZ |
1217 | } |
1218 | ||
d115ee9b KZ |
1219 | /** |
1220 | * mnt_fs_print_debug | |
1221 | * @fs: fstab/mtab/mountinfo entry | |
1222 | * @file: output | |
1223 | * | |
56be757f | 1224 | * Returns: 0 on success or negative number in case of error. |
d115ee9b | 1225 | */ |
68164f6c | 1226 | int mnt_fs_print_debug(struct libmnt_fs *fs, FILE *file) |
d115ee9b KZ |
1227 | { |
1228 | if (!fs) | |
56be757f | 1229 | return -EINVAL; |
d115ee9b | 1230 | fprintf(file, "------ fs: %p\n", fs); |
77417bc0 KZ |
1231 | fprintf(file, "source: %s\n", mnt_fs_get_source(fs)); |
1232 | fprintf(file, "target: %s\n", mnt_fs_get_target(fs)); | |
1233 | fprintf(file, "fstype: %s\n", mnt_fs_get_fstype(fs)); | |
76a06ca4 | 1234 | |
f2b3a3a3 KZ |
1235 | if (mnt_fs_get_options(fs)) |
1236 | fprintf(file, "optstr: %s\n", mnt_fs_get_options(fs)); | |
76a06ca4 KZ |
1237 | if (mnt_fs_get_vfs_options(fs)) |
1238 | fprintf(file, "VFS-optstr: %s\n", mnt_fs_get_vfs_options(fs)); | |
1239 | if (mnt_fs_get_fs_options(fs)) | |
1240 | fprintf(file, "FS-opstr: %s\n", mnt_fs_get_fs_options(fs)); | |
68164f6c KZ |
1241 | if (mnt_fs_get_user_options(fs)) |
1242 | fprintf(file, "user-optstr: %s\n", mnt_fs_get_user_options(fs)); | |
76a06ca4 KZ |
1243 | if (mnt_fs_get_attributes(fs)) |
1244 | fprintf(file, "attributes: %s\n", mnt_fs_get_attributes(fs)); | |
dd369652 KZ |
1245 | |
1246 | if (mnt_fs_get_root(fs)) | |
77417bc0 | 1247 | fprintf(file, "root: %s\n", mnt_fs_get_root(fs)); |
dd369652 KZ |
1248 | if (mnt_fs_get_bindsrc(fs)) |
1249 | fprintf(file, "bindsrc: %s\n", mnt_fs_get_bindsrc(fs)); | |
9dd75aa6 | 1250 | if (mnt_fs_get_freq(fs)) |
77417bc0 | 1251 | fprintf(file, "freq: %d\n", mnt_fs_get_freq(fs)); |
9dd75aa6 | 1252 | if (mnt_fs_get_passno(fs)) |
77417bc0 | 1253 | fprintf(file, "pass: %d\n", mnt_fs_get_passno(fs)); |
9dd75aa6 | 1254 | if (mnt_fs_get_id(fs)) |
77417bc0 | 1255 | fprintf(file, "id: %d\n", mnt_fs_get_id(fs)); |
9dd75aa6 | 1256 | if (mnt_fs_get_parent_id(fs)) |
77417bc0 | 1257 | fprintf(file, "parent: %d\n", mnt_fs_get_parent_id(fs)); |
9dd75aa6 | 1258 | if (mnt_fs_get_devno(fs)) |
77417bc0 | 1259 | fprintf(file, "devno: %d:%d\n", major(mnt_fs_get_devno(fs)), |
9dd75aa6 | 1260 | minor(mnt_fs_get_devno(fs))); |
d115ee9b KZ |
1261 | return 0; |
1262 | } | |
8b95253f KZ |
1263 | |
1264 | /** | |
1265 | * mnt_free_mntent: | |
1266 | * @mnt: mount entry | |
1267 | * | |
1268 | * Deallocates "mntent.h" mount entry. | |
1269 | */ | |
1270 | void mnt_free_mntent(struct mntent *mnt) | |
1271 | { | |
1272 | if (mnt) { | |
1273 | free(mnt->mnt_fsname); | |
1274 | free(mnt->mnt_dir); | |
1275 | free(mnt->mnt_type); | |
1276 | free(mnt->mnt_opts); | |
1277 | free(mnt); | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | /** | |
1282 | * mnt_fs_to_mntent: | |
1283 | * @fs: filesystem | |
1284 | * @mnt: mount description (as described in mntent.h) | |
1285 | * | |
1286 | * Copies information from @fs to struct mntent @mnt. If @mnt is already set | |
1287 | * then the struct mntent items are reallocated and updated. See also | |
1288 | * mnt_free_mntent(). | |
1289 | * | |
1290 | * Returns: 0 on success and negative number in case of error. | |
1291 | */ | |
68164f6c | 1292 | int mnt_fs_to_mntent(struct libmnt_fs *fs, struct mntent **mnt) |
8b95253f KZ |
1293 | { |
1294 | int rc; | |
1295 | struct mntent *m; | |
1296 | ||
1297 | if (!fs || !mnt) | |
1298 | return -EINVAL; | |
1299 | ||
1300 | m = *mnt; | |
1301 | if (!m) { | |
1302 | m = calloc(1, sizeof(*m)); | |
1303 | if (!m) | |
1304 | return -ENOMEM; | |
1305 | } | |
1306 | ||
309139c7 | 1307 | if ((rc = update_str(&m->mnt_fsname, mnt_fs_get_source(fs)))) |
8b95253f | 1308 | goto err; |
309139c7 | 1309 | if ((rc = update_str(&m->mnt_dir, mnt_fs_get_target(fs)))) |
8b95253f | 1310 | goto err; |
309139c7 | 1311 | if ((rc = update_str(&m->mnt_type, mnt_fs_get_fstype(fs)))) |
8b95253f | 1312 | goto err; |
76a06ca4 KZ |
1313 | |
1314 | errno = 0; | |
1315 | m->mnt_opts = mnt_fs_strdup_options(fs); | |
1316 | if (!m->mnt_opts && errno) { | |
1317 | rc = -errno; | |
8b95253f | 1318 | goto err; |
76a06ca4 KZ |
1319 | } |
1320 | ||
8b95253f KZ |
1321 | m->mnt_freq = mnt_fs_get_freq(fs); |
1322 | m->mnt_passno = mnt_fs_get_passno(fs); | |
1323 | ||
de511a88 KZ |
1324 | if (!m->mnt_fsname) { |
1325 | m->mnt_fsname = strdup("none"); | |
1326 | if (!m->mnt_fsname) | |
1327 | goto err; | |
1328 | } | |
8b95253f KZ |
1329 | *mnt = m; |
1330 | ||
1331 | return 0; | |
1332 | err: | |
1333 | if (m != *mnt) | |
1334 | mnt_free_mntent(m); | |
1335 | return rc; | |
1336 | } |