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6b1dc2bd LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <mntent.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include <unistd.h> | |
27 | ||
28 | #include "log.h" | |
29 | #include "util.h" | |
30 | #include "unit-name.h" | |
31 | #include "path-util.h" | |
32 | #include "mount-setup.h" | |
33 | #include "special.h" | |
34 | #include "mkdir.h" | |
35 | ||
36 | static const char *arg_dest = "/tmp"; | |
37 | ||
38 | static int device_name(const char *path, char **unit) { | |
39 | char *p; | |
40 | ||
41 | assert(path); | |
42 | ||
43 | if (!is_device_path(path)) | |
44 | return 0; | |
45 | ||
46 | p = unit_name_from_path(path, ".device"); | |
47 | if (!p) | |
48 | return -ENOMEM; | |
49 | ||
50 | *unit = p; | |
51 | return 1; | |
52 | } | |
53 | ||
54 | static int mount_find_pri(struct mntent *me, int *ret) { | |
55 | char *end, *pri; | |
56 | unsigned long r; | |
57 | ||
58 | assert(me); | |
59 | assert(ret); | |
60 | ||
61 | pri = hasmntopt(me, "pri"); | |
62 | if (!pri) | |
63 | return 0; | |
64 | ||
65 | pri += 4; | |
66 | ||
67 | errno = 0; | |
68 | r = strtoul(pri, &end, 10); | |
69 | if (errno != 0) | |
70 | return -errno; | |
71 | ||
72 | if (end == pri || (*end != ',' && *end != 0)) | |
73 | return -EINVAL; | |
74 | ||
75 | *ret = (int) r; | |
76 | return 1; | |
77 | } | |
78 | ||
79 | static int add_swap(const char *what, struct mntent *me) { | |
80 | char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL; | |
81 | FILE *f = NULL; | |
82 | bool noauto, nofail; | |
83 | int r, pri = -1; | |
84 | ||
85 | assert(what); | |
86 | assert(me); | |
87 | ||
88 | r = mount_find_pri(me, &pri); | |
89 | if (r < 0) { | |
90 | log_error("Failed to parse priority"); | |
91 | return pri; | |
92 | } | |
93 | ||
94 | noauto = !!hasmntopt(me, "noauto"); | |
95 | nofail = !!hasmntopt(me, "nofail"); | |
96 | ||
97 | name = unit_name_from_path(what, ".swap"); | |
98 | if (!name) { | |
99 | log_error("Out of memory"); | |
100 | r = -ENOMEM; | |
101 | goto finish; | |
102 | } | |
103 | ||
104 | unit = join(arg_dest, "/", name, NULL); | |
105 | if (!unit) { | |
106 | log_error("Out of memory"); | |
107 | r = -ENOMEM; | |
108 | goto finish; | |
109 | } | |
110 | ||
111 | f = fopen(unit, "wxe"); | |
112 | if (!f) { | |
113 | r = -errno; | |
114 | log_error("Failed to create unit file: %m"); | |
115 | goto finish; | |
116 | } | |
117 | ||
118 | fputs("# Automatically generated by systemd-fstab-generator\n\n" | |
119 | "[Unit]\n" | |
1b64d026 | 120 | "SourcePath=/etc/fstab\n" |
6b1dc2bd LP |
121 | "DefaultDependencies=no\n" |
122 | "Conflicts=" SPECIAL_UMOUNT_TARGET "\n" | |
123 | "Before=" SPECIAL_UMOUNT_TARGET "\n", f); | |
124 | ||
125 | if (!noauto && !nofail) | |
126 | fputs("Before=" SPECIAL_SWAP_TARGET "\n", f); | |
127 | ||
128 | fprintf(f, | |
129 | "\n" | |
130 | "[Swap]\n" | |
131 | "What=%s\n", | |
132 | what); | |
133 | ||
134 | if (pri >= 0) | |
135 | fprintf(f, | |
136 | "Priority=%i\n", | |
137 | pri); | |
138 | ||
139 | fflush(f); | |
140 | if (ferror(f)) { | |
141 | log_error("Failed to write unit file: %m"); | |
142 | r = -errno; | |
143 | goto finish; | |
144 | } | |
145 | ||
146 | if (!noauto) { | |
147 | lnk = join(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL); | |
148 | if (!lnk) { | |
149 | log_error("Out of memory"); | |
150 | r = -ENOMEM; | |
151 | goto finish; | |
152 | } | |
153 | ||
154 | mkdir_parents(lnk, 0755); | |
155 | if (symlink(unit, lnk) < 0) { | |
156 | log_error("Failed to create symlink: %m"); | |
157 | r = -errno; | |
158 | goto finish; | |
159 | } | |
160 | ||
161 | r = device_name(what, &device); | |
162 | if (r < 0) { | |
163 | log_error("Out of memory"); | |
164 | r = -ENOMEM; | |
165 | goto finish; | |
166 | } | |
167 | ||
168 | if (r > 0) { | |
169 | free(lnk); | |
170 | lnk = join(arg_dest, "/", device, ".wants/", name, NULL); | |
171 | if (!lnk) { | |
172 | log_error("Out of memory"); | |
173 | r = -ENOMEM; | |
174 | goto finish; | |
175 | } | |
176 | ||
177 | mkdir_parents(lnk, 0755); | |
178 | if (symlink(unit, lnk) < 0) { | |
179 | log_error("Failed to create symlink: %m"); | |
180 | r = -errno; | |
181 | goto finish; | |
182 | } | |
183 | } | |
184 | } | |
185 | ||
186 | r = 0; | |
187 | finish: | |
188 | if (f) | |
189 | fclose(f); | |
190 | ||
191 | free(unit); | |
192 | free(lnk); | |
193 | free(name); | |
194 | free(device); | |
195 | ||
196 | return r; | |
197 | } | |
198 | ||
199 | static bool mount_is_bind(struct mntent *me) { | |
200 | assert(me); | |
201 | ||
202 | return | |
203 | hasmntopt(me, "bind") || | |
204 | streq(me->mnt_opts, "bind"); | |
205 | } | |
206 | ||
207 | static bool mount_is_network(struct mntent *me) { | |
208 | assert(me); | |
209 | ||
210 | return | |
211 | hasmntopt(me, "_netdev") || | |
212 | fstype_is_network(me->mnt_type); | |
213 | } | |
214 | ||
215 | static int add_mount(const char *what, const char *where, struct mntent *me) { | |
216 | char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL, *automount_name = NULL, *automount_unit = NULL; | |
217 | FILE *f = NULL; | |
218 | bool noauto, nofail, automount, isbind, isnetwork; | |
219 | int r; | |
220 | const char *post, *pre; | |
221 | ||
222 | assert(what); | |
223 | assert(where); | |
224 | assert(me); | |
225 | ||
226 | if (streq(me->mnt_type, "autofs")) | |
227 | return 0; | |
228 | ||
229 | if (!is_path(where)) { | |
230 | log_warning("Mount point %s is not a valid path, ignoring.", where); | |
231 | return 0; | |
232 | } | |
233 | ||
234 | if (mount_point_is_api(where) || | |
235 | mount_point_ignore(where)) | |
236 | return 0; | |
237 | ||
238 | isnetwork = mount_is_network(me); | |
239 | isbind = mount_is_bind(me); | |
240 | ||
241 | noauto = !!hasmntopt(me, "noauto"); | |
242 | nofail = !!hasmntopt(me, "nofail"); | |
243 | automount = | |
244 | hasmntopt(me, "comment=systemd.automount") || | |
245 | hasmntopt(me, "x-systemd.automount"); | |
246 | ||
247 | if (isnetwork) { | |
248 | post = SPECIAL_REMOTE_FS_TARGET; | |
249 | pre = SPECIAL_REMOTE_FS_PRE_TARGET; | |
250 | } else { | |
251 | post = SPECIAL_LOCAL_FS_TARGET; | |
252 | pre = SPECIAL_LOCAL_FS_PRE_TARGET; | |
253 | } | |
254 | ||
255 | name = unit_name_from_path(where, ".mount"); | |
256 | if (!name) { | |
257 | log_error("Out of memory"); | |
258 | r = -ENOMEM; | |
259 | goto finish; | |
260 | } | |
261 | ||
262 | unit = join(arg_dest, "/", name, NULL); | |
263 | if (!unit) { | |
264 | log_error("Out of memory"); | |
265 | r = -ENOMEM; | |
266 | goto finish; | |
267 | } | |
268 | ||
269 | f = fopen(unit, "wxe"); | |
270 | if (!f) { | |
271 | r = -errno; | |
272 | log_error("Failed to create unit file: %m"); | |
273 | goto finish; | |
274 | } | |
275 | ||
276 | fputs("# Automatically generated by systemd-fstab-generator\n\n" | |
277 | "[Unit]\n" | |
1b64d026 | 278 | "SourcePath=/etc/fstab\n" |
6b1dc2bd LP |
279 | "DefaultDependencies=no\n", f); |
280 | ||
281 | if (!path_equal(where, "/")) | |
282 | fprintf(f, | |
283 | "After=%s\n" | |
284 | "Wants=%s\n" | |
285 | "Conflicts=" SPECIAL_UMOUNT_TARGET "\n" | |
286 | "Before=" SPECIAL_UMOUNT_TARGET "\n", | |
287 | pre, | |
288 | pre); | |
289 | ||
290 | ||
291 | if (!noauto && !nofail && !automount) | |
292 | fprintf(f, | |
293 | "Before=%s\n", | |
294 | post); | |
295 | ||
296 | fprintf(f, | |
297 | "\n" | |
298 | "[Mount]\n" | |
299 | "What=%s\n" | |
300 | "Where=%s\n" | |
301 | "Type=%s\n" | |
302 | "FsckPassNo=%i\n", | |
303 | what, | |
304 | where, | |
305 | me->mnt_type, | |
306 | me->mnt_passno); | |
307 | ||
308 | if (!isempty(me->mnt_opts) && | |
309 | !streq(me->mnt_opts, "defaults")) | |
310 | fprintf(f, | |
311 | "Options=%s\n", | |
312 | me->mnt_opts); | |
313 | ||
314 | fflush(f); | |
315 | if (ferror(f)) { | |
316 | log_error("Failed to write unit file: %m"); | |
317 | r = -errno; | |
318 | goto finish; | |
319 | } | |
320 | ||
321 | if (!noauto) { | |
322 | lnk = join(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL); | |
323 | if (!lnk) { | |
324 | log_error("Out of memory"); | |
325 | r = -ENOMEM; | |
326 | goto finish; | |
327 | } | |
328 | ||
329 | mkdir_parents(lnk, 0755); | |
330 | if (symlink(unit, lnk) < 0) { | |
331 | log_error("Failed to create symlink: %m"); | |
332 | r = -errno; | |
333 | goto finish; | |
334 | } | |
335 | ||
336 | if (!isbind && | |
337 | !path_equal(where, "/")) { | |
338 | ||
339 | r = device_name(what, &device); | |
340 | if (r < 0) { | |
341 | log_error("Out of memory"); | |
342 | r = -ENOMEM; | |
343 | goto finish; | |
344 | } | |
345 | ||
346 | if (r > 0) { | |
347 | free(lnk); | |
348 | lnk = join(arg_dest, "/", device, ".wants/", name, NULL); | |
349 | if (!lnk) { | |
350 | log_error("Out of memory"); | |
351 | r = -ENOMEM; | |
352 | goto finish; | |
353 | } | |
354 | ||
355 | mkdir_parents(lnk, 0755); | |
356 | if (symlink(unit, lnk) < 0) { | |
357 | log_error("Failed to creat symlink: %m"); | |
358 | r = -errno; | |
359 | goto finish; | |
360 | } | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | if (automount && !path_equal(where, "/")) { | |
366 | automount_name = unit_name_from_path(where, ".automount"); | |
367 | if (!name) { | |
368 | log_error("Out of memory"); | |
369 | r = -ENOMEM; | |
370 | goto finish; | |
371 | } | |
372 | ||
373 | automount_unit = join(arg_dest, "/", automount_name, NULL); | |
374 | if (!automount_unit) { | |
375 | log_error("Out of memory"); | |
376 | r = -ENOMEM; | |
377 | goto finish; | |
378 | } | |
379 | ||
380 | fclose(f); | |
381 | f = fopen(automount_unit, "wxe"); | |
382 | if (!f) { | |
383 | r = -errno; | |
384 | log_error("Failed to create unit file: %m"); | |
385 | goto finish; | |
386 | } | |
387 | ||
388 | fprintf(f, | |
389 | "# Automatically generated by systemd-fstab-generator\n\n" | |
390 | "[Unit]\n" | |
1b64d026 | 391 | "SourcePath=/etc/fstab\n" |
6b1dc2bd LP |
392 | "DefaultDependencies=no\n" |
393 | "Conflicts=" SPECIAL_UMOUNT_TARGET "\n" | |
394 | "Before=" SPECIAL_UMOUNT_TARGET " %s\n" | |
395 | "\n" | |
396 | "[Automount]\n" | |
397 | "Where=%s\n", | |
398 | post, | |
399 | where); | |
400 | ||
401 | fflush(f); | |
402 | if (ferror(f)) { | |
403 | log_error("Failed to write unit file: %m"); | |
404 | r = -errno; | |
405 | goto finish; | |
406 | } | |
407 | ||
408 | free(lnk); | |
409 | lnk = join(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL); | |
410 | if (!lnk) { | |
411 | log_error("Out of memory"); | |
412 | r = -ENOMEM; | |
413 | goto finish; | |
414 | } | |
415 | ||
416 | mkdir_parents(lnk, 0755); | |
417 | if (symlink(automount_unit, lnk) < 0) { | |
418 | log_error("Failed to create symlink: %m"); | |
419 | r = -errno; | |
420 | goto finish; | |
421 | } | |
422 | } | |
423 | ||
424 | r = 0; | |
425 | finish: | |
426 | if (f) | |
427 | fclose(f); | |
428 | ||
429 | free(unit); | |
430 | free(lnk); | |
431 | free(name); | |
432 | free(device); | |
433 | free(automount_name); | |
434 | free(automount_unit); | |
435 | ||
436 | return r; | |
437 | } | |
438 | ||
439 | static int parse_fstab(void) { | |
440 | FILE *f; | |
441 | int r = 0; | |
442 | struct mntent *me; | |
443 | ||
444 | errno = 0; | |
445 | f = setmntent("/etc/fstab", "r"); | |
446 | if (!f) { | |
447 | if (errno == ENOENT) | |
448 | return 0; | |
449 | ||
450 | log_error("Failed to open /etc/fstab: %m"); | |
451 | return -errno; | |
452 | } | |
453 | ||
454 | while ((me = getmntent(f))) { | |
455 | char *where, *what; | |
456 | int k; | |
457 | ||
458 | what = fstab_node_to_udev_node(me->mnt_fsname); | |
459 | if (!what) { | |
460 | log_error("Out of memory"); | |
461 | r = -ENOMEM; | |
462 | goto finish; | |
463 | } | |
464 | ||
465 | where = strdup(me->mnt_dir); | |
466 | if (!where) { | |
467 | log_error("Out of memory"); | |
468 | free(what); | |
469 | r = -ENOMEM; | |
470 | goto finish; | |
471 | } | |
472 | ||
473 | if (is_path(what)) | |
474 | path_kill_slashes(what); | |
475 | ||
476 | if (is_path(where)) | |
477 | path_kill_slashes(where); | |
478 | ||
479 | log_debug("Found entry what=%s where=%s type=%s", what, where, me->mnt_type); | |
480 | ||
481 | if (streq(me->mnt_type, "swap")) | |
482 | k = add_swap(what, me); | |
483 | else | |
484 | k = add_mount(what, where, me); | |
485 | ||
486 | free(what); | |
487 | free(where); | |
488 | ||
489 | if (k < 0) | |
490 | r = k; | |
491 | } | |
492 | ||
493 | finish: | |
494 | endmntent(f); | |
495 | return r; | |
496 | } | |
497 | ||
498 | int main(int argc, char *argv[]) { | |
499 | int r; | |
500 | ||
07719a21 LP |
501 | if (argc > 1 && argc != 4) { |
502 | log_error("This program takes three or no arguments."); | |
6b1dc2bd LP |
503 | return EXIT_FAILURE; |
504 | } | |
505 | ||
506 | if (argc > 1) | |
507 | arg_dest = argv[1]; | |
508 | ||
a6903061 | 509 | log_set_target(LOG_TARGET_SAFE); |
6b1dc2bd LP |
510 | log_parse_environment(); |
511 | log_open(); | |
512 | ||
6b1dc2bd LP |
513 | umask(0022); |
514 | ||
515 | r = parse_fstab(); | |
516 | ||
517 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
518 | } |