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1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2016 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <getopt.h> | |
21 | ||
22 | #include "libudev.h" | |
23 | #include "sd-bus.h" | |
24 | ||
25 | #include "bus-error.h" | |
26 | #include "bus-unit-util.h" | |
27 | #include "bus-util.h" | |
28 | #include "escape.h" | |
29 | #include "fstab-util.h" | |
30 | #include "pager.h" | |
31 | #include "parse-util.h" | |
32 | #include "path-util.h" | |
33 | #include "spawn-polkit-agent.h" | |
34 | #include "strv.h" | |
35 | #include "udev-util.h" | |
36 | #include "unit-name.h" | |
37 | #include "terminal-util.h" | |
38 | ||
39 | enum { | |
40 | ACTION_DEFAULT, | |
41 | ACTION_MOUNT, | |
42 | ACTION_AUTOMOUNT, | |
43 | ACTION_LIST, | |
44 | } arg_action = ACTION_DEFAULT; | |
45 | ||
46 | static bool arg_no_block = false; | |
47 | static bool arg_no_pager = false; | |
48 | static bool arg_ask_password = true; | |
49 | static bool arg_quiet = false; | |
50 | static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; | |
51 | static bool arg_user = false; | |
52 | static const char *arg_host = NULL; | |
53 | static bool arg_discover = false; | |
54 | static char *arg_mount_what = NULL; | |
55 | static char *arg_mount_where = NULL; | |
56 | static char *arg_mount_type = NULL; | |
57 | static char *arg_mount_options = NULL; | |
58 | static char *arg_description = NULL; | |
59 | static char **arg_property = NULL; | |
60 | static usec_t arg_timeout_idle = USEC_INFINITY; | |
61 | static bool arg_timeout_idle_set = false; | |
62 | static char **arg_automount_property = NULL; | |
63 | static int arg_bind_device = -1; | |
64 | static bool arg_fsck = true; | |
65 | ||
66 | static void polkit_agent_open_if_enabled(void) { | |
67 | ||
68 | /* Open the polkit agent as a child process if necessary */ | |
69 | if (!arg_ask_password) | |
70 | return; | |
71 | ||
72 | if (arg_transport != BUS_TRANSPORT_LOCAL) | |
73 | return; | |
74 | ||
75 | polkit_agent_open(); | |
76 | } | |
77 | ||
78 | static void help(void) { | |
79 | printf("%s [OPTIONS...] WHAT [WHERE]\n\n" | |
80 | "Establish a mount or auto-mount point transiently.\n\n" | |
81 | " -h --help Show this help\n" | |
82 | " --version Show package version\n" | |
83 | " --no-block Do not wait until operation finished\n" | |
84 | " --no-pager Do not pipe output into a pager\n" | |
85 | " --no-ask-password Do not prompt for password\n" | |
86 | " -q --quiet Suppress information messages during runtime\n" | |
87 | " --user Run as user unit\n" | |
88 | " -H --host=[USER@]HOST Operate on remote host\n" | |
89 | " -M --machine=CONTAINER Operate on local container\n" | |
90 | " --discover Discover mount device metadata\n" | |
91 | " -t --type=TYPE File system type\n" | |
92 | " -o --options=OPTIONS Mount options\n" | |
93 | " --fsck=no Don't run file system check before mount\n" | |
94 | " --description=TEXT Description for unit\n" | |
95 | " -p --property=NAME=VALUE Set mount unit property\n" | |
96 | " -A --automount=BOOL Create an auto-mount point\n" | |
97 | " --timeout-idle-sec=SEC Specify automount idle timeout\n" | |
98 | " --automount-property=NAME=VALUE\n" | |
99 | " Set automount unit property\n" | |
100 | " --bind-device Bind automount unit to device\n" | |
101 | " --list List mountable block devices\n" | |
102 | , program_invocation_short_name); | |
103 | } | |
104 | ||
105 | static int parse_argv(int argc, char *argv[]) { | |
106 | ||
107 | enum { | |
108 | ARG_VERSION = 0x100, | |
109 | ARG_NO_BLOCK, | |
110 | ARG_NO_PAGER, | |
111 | ARG_NO_ASK_PASSWORD, | |
112 | ARG_USER, | |
113 | ARG_SYSTEM, | |
114 | ARG_DISCOVER, | |
115 | ARG_MOUNT_TYPE, | |
116 | ARG_MOUNT_OPTIONS, | |
117 | ARG_FSCK, | |
118 | ARG_DESCRIPTION, | |
119 | ARG_TIMEOUT_IDLE, | |
120 | ARG_AUTOMOUNT, | |
121 | ARG_AUTOMOUNT_PROPERTY, | |
122 | ARG_BIND_DEVICE, | |
123 | ARG_LIST, | |
124 | }; | |
125 | ||
126 | static const struct option options[] = { | |
127 | { "help", no_argument, NULL, 'h' }, | |
128 | { "version", no_argument, NULL, ARG_VERSION }, | |
129 | { "no-block", no_argument, NULL, ARG_NO_BLOCK }, | |
130 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, | |
131 | { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD }, | |
132 | { "quiet", no_argument, NULL, 'q' }, | |
133 | { "user", no_argument, NULL, ARG_USER }, | |
134 | { "system", no_argument, NULL, ARG_SYSTEM }, | |
135 | { "host", required_argument, NULL, 'H' }, | |
136 | { "machine", required_argument, NULL, 'M' }, | |
137 | { "discover", no_argument, NULL, ARG_DISCOVER }, | |
138 | { "type", required_argument, NULL, 't' }, | |
139 | { "options", required_argument, NULL, 'o' }, | |
140 | { "description", required_argument, NULL, ARG_DESCRIPTION }, | |
141 | { "property", required_argument, NULL, 'p' }, | |
142 | { "automount", required_argument, NULL, ARG_AUTOMOUNT }, | |
143 | { "timeout-idle-sec", required_argument, NULL, ARG_TIMEOUT_IDLE }, | |
144 | { "automount-property", required_argument, NULL, ARG_AUTOMOUNT_PROPERTY }, | |
145 | { "bind-device", no_argument, NULL, ARG_BIND_DEVICE }, | |
146 | { "list", no_argument, NULL, ARG_LIST }, | |
147 | {}, | |
148 | }; | |
149 | ||
150 | int r, c; | |
151 | ||
152 | assert(argc >= 0); | |
153 | assert(argv); | |
154 | ||
155 | while ((c = getopt_long(argc, argv, "hqH:M:t:o:p:A", options, NULL)) >= 0) | |
156 | ||
157 | switch (c) { | |
158 | ||
159 | case 'h': | |
160 | help(); | |
161 | return 0; | |
162 | ||
163 | case ARG_VERSION: | |
164 | return version(); | |
165 | ||
166 | case ARG_NO_BLOCK: | |
167 | arg_no_block = true; | |
168 | break; | |
169 | ||
170 | case ARG_NO_PAGER: | |
171 | arg_no_pager = true; | |
172 | break; | |
173 | ||
174 | case ARG_NO_ASK_PASSWORD: | |
175 | arg_ask_password = false; | |
176 | break; | |
177 | ||
178 | case 'q': | |
179 | arg_quiet = true; | |
180 | break; | |
181 | ||
182 | case ARG_USER: | |
183 | arg_user = true; | |
184 | break; | |
185 | ||
186 | case ARG_SYSTEM: | |
187 | arg_user = false; | |
188 | break; | |
189 | ||
190 | case 'H': | |
191 | arg_transport = BUS_TRANSPORT_REMOTE; | |
192 | arg_host = optarg; | |
193 | break; | |
194 | ||
195 | case 'M': | |
196 | arg_transport = BUS_TRANSPORT_MACHINE; | |
197 | arg_host = optarg; | |
198 | break; | |
199 | ||
200 | case ARG_DISCOVER: | |
201 | arg_discover = true; | |
202 | break; | |
203 | ||
204 | case 't': | |
205 | if (free_and_strdup(&arg_mount_type, optarg) < 0) | |
206 | return log_oom(); | |
207 | break; | |
208 | ||
209 | case 'o': | |
210 | if (free_and_strdup(&arg_mount_options, optarg) < 0) | |
211 | return log_oom(); | |
212 | break; | |
213 | ||
214 | case ARG_FSCK: | |
215 | r = parse_boolean(optarg); | |
216 | if (r < 0) | |
217 | return log_error_errno(r, "Failed to parse --fsck= argument: %s", optarg); | |
218 | ||
219 | arg_fsck = r; | |
220 | break; | |
221 | ||
222 | case ARG_DESCRIPTION: | |
223 | if (free_and_strdup(&arg_description, optarg) < 0) | |
224 | return log_oom(); | |
225 | break; | |
226 | ||
227 | case 'p': | |
228 | if (strv_extend(&arg_property, optarg) < 0) | |
229 | return log_oom(); | |
230 | ||
231 | break; | |
232 | ||
233 | case 'A': | |
234 | arg_action = ACTION_AUTOMOUNT; | |
235 | break; | |
236 | ||
237 | case ARG_AUTOMOUNT: | |
238 | r = parse_boolean(optarg); | |
239 | if (r < 0) | |
240 | return log_error_errno(r, "--automount= expects a valid boolean parameter: %s", optarg); | |
241 | ||
242 | arg_action = r ? ACTION_AUTOMOUNT : ACTION_MOUNT; | |
243 | break; | |
244 | ||
245 | case ARG_TIMEOUT_IDLE: | |
246 | r = parse_sec(optarg, &arg_timeout_idle); | |
247 | if (r < 0) | |
248 | return log_error_errno(r, "Failed to parse timeout: %s", optarg); | |
249 | ||
250 | break; | |
251 | ||
252 | case ARG_AUTOMOUNT_PROPERTY: | |
253 | if (strv_extend(&arg_automount_property, optarg) < 0) | |
254 | return log_oom(); | |
255 | ||
256 | break; | |
257 | ||
258 | case ARG_BIND_DEVICE: | |
259 | arg_bind_device = true; | |
260 | break; | |
261 | ||
262 | case ARG_LIST: | |
263 | arg_action = ACTION_LIST; | |
264 | break; | |
265 | ||
266 | case '?': | |
267 | return -EINVAL; | |
268 | ||
269 | default: | |
270 | assert_not_reached("Unhandled option"); | |
271 | } | |
272 | ||
273 | if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL) { | |
274 | log_error("Execution in user context is not supported on non-local systems."); | |
275 | return -EINVAL; | |
276 | } | |
277 | ||
278 | if (arg_action == ACTION_LIST) { | |
279 | if (optind < argc) { | |
280 | log_error("Too many arguments."); | |
281 | return -EINVAL; | |
282 | } | |
283 | ||
284 | if (arg_transport != BUS_TRANSPORT_LOCAL) { | |
285 | log_error("Listing devices only supported locally."); | |
286 | return -EOPNOTSUPP; | |
287 | } | |
288 | } else { | |
289 | if (optind >= argc) { | |
290 | log_error("At least one argument required."); | |
291 | return -EINVAL; | |
292 | } | |
293 | ||
294 | if (argc > optind+2) { | |
295 | log_error("At most two arguments required."); | |
296 | return -EINVAL; | |
297 | } | |
298 | ||
299 | arg_mount_what = fstab_node_to_udev_node(argv[optind]); | |
300 | if (!arg_mount_what) | |
301 | return log_oom(); | |
302 | ||
303 | if (argc > optind+1) { | |
304 | r = path_make_absolute_cwd(argv[optind+1], &arg_mount_where); | |
305 | if (r < 0) | |
306 | return log_error_errno(r, "Failed to make path absolute: %m"); | |
307 | } else | |
308 | arg_discover = true; | |
309 | ||
310 | if (arg_discover && arg_transport != BUS_TRANSPORT_LOCAL) { | |
311 | log_error("Automatic mount location discovery is only supported locally."); | |
312 | return -EOPNOTSUPP; | |
313 | } | |
314 | } | |
315 | ||
316 | return 1; | |
317 | } | |
318 | ||
319 | static int transient_unit_set_properties(sd_bus_message *m, char **properties) { | |
320 | int r; | |
321 | ||
322 | r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description); | |
323 | if (r < 0) | |
324 | return r; | |
325 | ||
326 | if (arg_bind_device && is_device_path(arg_mount_what)) { | |
327 | _cleanup_free_ char *device_unit = NULL; | |
328 | ||
329 | r = unit_name_from_path(arg_mount_what, ".device", &device_unit); | |
330 | if (r < 0) | |
331 | return r; | |
332 | ||
333 | r = sd_bus_message_append(m, "(sv)(sv)", | |
334 | "After", "as", 1, device_unit, | |
335 | "BindsTo", "as", 1, device_unit); | |
336 | if (r < 0) | |
337 | return r; | |
338 | } | |
339 | ||
340 | r = bus_append_unit_property_assignment_many(m, properties); | |
341 | if (r < 0) | |
342 | return r; | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | static int transient_mount_set_properties(sd_bus_message *m) { | |
348 | int r; | |
349 | ||
350 | assert(m); | |
351 | ||
352 | r = transient_unit_set_properties(m, arg_property); | |
353 | if (r < 0) | |
354 | return r; | |
355 | ||
356 | if (arg_mount_what) { | |
357 | r = sd_bus_message_append(m, "(sv)", "What", "s", arg_mount_what); | |
358 | if (r < 0) | |
359 | return r; | |
360 | } | |
361 | ||
362 | if (arg_mount_type) { | |
363 | r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_mount_type); | |
364 | if (r < 0) | |
365 | return r; | |
366 | } | |
367 | ||
368 | if (arg_mount_options) { | |
369 | r = sd_bus_message_append(m, "(sv)", "Options", "s", arg_mount_options); | |
370 | if (r < 0) | |
371 | return r; | |
372 | } | |
373 | ||
374 | if (arg_fsck) { | |
375 | _cleanup_free_ char *fsck = NULL; | |
376 | ||
377 | r = unit_name_from_path_instance("systemd-fsck", arg_mount_what, ".service", &fsck); | |
378 | if (r < 0) | |
379 | return r; | |
380 | ||
381 | r = sd_bus_message_append(m, | |
382 | "(sv)(sv)", | |
383 | "Requires", "as", 1, fsck, | |
384 | "After", "as", 1, fsck); | |
385 | if (r < 0) | |
386 | return r; | |
387 | } | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | static int transient_automount_set_properties(sd_bus_message *m) { | |
393 | int r; | |
394 | ||
395 | assert(m); | |
396 | ||
397 | r = transient_unit_set_properties(m, arg_automount_property); | |
398 | if (r < 0) | |
399 | return r; | |
400 | ||
401 | if (arg_timeout_idle != USEC_INFINITY) { | |
402 | r = sd_bus_message_append(m, "(sv)", "TimeoutIdleUSec", "t", arg_timeout_idle); | |
403 | if (r < 0) | |
404 | return r; | |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | static int start_transient_mount( | |
411 | sd_bus *bus, | |
412 | char **argv) { | |
413 | ||
414 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; | |
415 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
416 | _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; | |
417 | _cleanup_free_ char *mount_unit = NULL; | |
418 | int r; | |
419 | ||
420 | if (!arg_no_block) { | |
421 | r = bus_wait_for_jobs_new(bus, &w); | |
422 | if (r < 0) | |
423 | return log_error_errno(r, "Could not watch jobs: %m"); | |
424 | } | |
425 | ||
426 | r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit); | |
427 | if (r < 0) | |
428 | return log_error_errno(r, "Failed to make mount unit name: %m"); | |
429 | ||
430 | r = sd_bus_message_new_method_call( | |
431 | bus, | |
432 | &m, | |
433 | "org.freedesktop.systemd1", | |
434 | "/org/freedesktop/systemd1", | |
435 | "org.freedesktop.systemd1.Manager", | |
436 | "StartTransientUnit"); | |
437 | if (r < 0) | |
438 | return bus_log_create_error(r); | |
439 | ||
440 | r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password); | |
441 | if (r < 0) | |
442 | return bus_log_create_error(r); | |
443 | ||
444 | /* Name and mode */ | |
445 | r = sd_bus_message_append(m, "ss", mount_unit, "fail"); | |
446 | if (r < 0) | |
447 | return bus_log_create_error(r); | |
448 | ||
449 | /* Properties */ | |
450 | r = sd_bus_message_open_container(m, 'a', "(sv)"); | |
451 | if (r < 0) | |
452 | return bus_log_create_error(r); | |
453 | ||
454 | r = transient_mount_set_properties(m); | |
455 | if (r < 0) | |
456 | return bus_log_create_error(r); | |
457 | ||
458 | r = sd_bus_message_close_container(m); | |
459 | if (r < 0) | |
460 | return bus_log_create_error(r); | |
461 | ||
462 | /* Auxiliary units */ | |
463 | r = sd_bus_message_append(m, "a(sa(sv))", 0); | |
464 | if (r < 0) | |
465 | return bus_log_create_error(r); | |
466 | ||
467 | polkit_agent_open_if_enabled(); | |
468 | ||
469 | r = sd_bus_call(bus, m, 0, &error, &reply); | |
470 | if (r < 0) | |
471 | return log_error_errno(r, "Failed to start transient mount unit: %s", bus_error_message(&error, r)); | |
472 | ||
473 | if (w) { | |
474 | const char *object; | |
475 | ||
476 | r = sd_bus_message_read(reply, "o", &object); | |
477 | if (r < 0) | |
478 | return bus_log_parse_error(r); | |
479 | ||
480 | r = bus_wait_for_jobs_one(w, object, arg_quiet); | |
481 | if (r < 0) | |
482 | return r; | |
483 | } | |
484 | ||
485 | if (!arg_quiet) | |
486 | log_info("Started unit %s%s%s for mount point: %s%s%s", | |
487 | ansi_highlight(), mount_unit, ansi_normal(), | |
488 | ansi_highlight(), arg_mount_where, ansi_normal()); | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static int start_transient_automount( | |
494 | sd_bus *bus, | |
495 | char **argv) { | |
496 | ||
497 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; | |
498 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
499 | _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; | |
500 | _cleanup_free_ char *automount_unit = NULL, *mount_unit = NULL; | |
501 | int r; | |
502 | ||
503 | if (!arg_no_block) { | |
504 | r = bus_wait_for_jobs_new(bus, &w); | |
505 | if (r < 0) | |
506 | return log_error_errno(r, "Could not watch jobs: %m"); | |
507 | } | |
508 | ||
509 | r = unit_name_from_path(arg_mount_where, ".automount", &automount_unit); | |
510 | if (r < 0) | |
511 | return log_error_errno(r, "Failed to make automount unit name: %m"); | |
512 | ||
513 | r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit); | |
514 | if (r < 0) | |
515 | return log_error_errno(r, "Failed to make mount unit name: %m"); | |
516 | ||
517 | r = sd_bus_message_new_method_call( | |
518 | bus, | |
519 | &m, | |
520 | "org.freedesktop.systemd1", | |
521 | "/org/freedesktop/systemd1", | |
522 | "org.freedesktop.systemd1.Manager", | |
523 | "StartTransientUnit"); | |
524 | if (r < 0) | |
525 | return bus_log_create_error(r); | |
526 | ||
527 | r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password); | |
528 | if (r < 0) | |
529 | return bus_log_create_error(r); | |
530 | ||
531 | /* Name and mode */ | |
532 | r = sd_bus_message_append(m, "ss", automount_unit, "fail"); | |
533 | if (r < 0) | |
534 | return bus_log_create_error(r); | |
535 | ||
536 | /* Properties */ | |
537 | r = sd_bus_message_open_container(m, 'a', "(sv)"); | |
538 | if (r < 0) | |
539 | return bus_log_create_error(r); | |
540 | ||
541 | r = transient_automount_set_properties(m); | |
542 | if (r < 0) | |
543 | return bus_log_create_error(r); | |
544 | ||
545 | r = sd_bus_message_close_container(m); | |
546 | if (r < 0) | |
547 | return bus_log_create_error(r); | |
548 | ||
549 | /* Auxiliary units */ | |
550 | r = sd_bus_message_open_container(m, 'a', "(sa(sv))"); | |
551 | if (r < 0) | |
552 | return bus_log_create_error(r); | |
553 | ||
554 | r = sd_bus_message_open_container(m, 'r', "sa(sv)"); | |
555 | if (r < 0) | |
556 | return bus_log_create_error(r); | |
557 | ||
558 | r = sd_bus_message_append(m, "s", mount_unit); | |
559 | if (r < 0) | |
560 | return bus_log_create_error(r); | |
561 | ||
562 | r = sd_bus_message_open_container(m, 'a', "(sv)"); | |
563 | if (r < 0) | |
564 | return bus_log_create_error(r); | |
565 | ||
566 | r = transient_mount_set_properties(m); | |
567 | if (r < 0) | |
568 | return bus_log_create_error(r); | |
569 | ||
570 | r = sd_bus_message_close_container(m); | |
571 | if (r < 0) | |
572 | return bus_log_create_error(r); | |
573 | ||
574 | r = sd_bus_message_close_container(m); | |
575 | if (r < 0) | |
576 | return bus_log_create_error(r); | |
577 | ||
578 | r = sd_bus_message_close_container(m); | |
579 | if (r < 0) | |
580 | return bus_log_create_error(r); | |
581 | ||
582 | polkit_agent_open_if_enabled(); | |
583 | ||
584 | r = sd_bus_call(bus, m, 0, &error, &reply); | |
585 | if (r < 0) | |
586 | return log_error_errno(r, "Failed to start transient automount unit: %s", bus_error_message(&error, r)); | |
587 | ||
588 | if (w) { | |
589 | const char *object; | |
590 | ||
591 | r = sd_bus_message_read(reply, "o", &object); | |
592 | if (r < 0) | |
593 | return bus_log_parse_error(r); | |
594 | ||
595 | r = bus_wait_for_jobs_one(w, object, arg_quiet); | |
596 | if (r < 0) | |
597 | return r; | |
598 | } | |
599 | ||
600 | if (!arg_quiet) | |
601 | log_info("Started unit %s%s%s for mount point: %s%s%s", | |
602 | ansi_highlight(), automount_unit, ansi_normal(), | |
603 | ansi_highlight(), arg_mount_where, ansi_normal()); | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
608 | static int acquire_mount_type(struct udev_device *d) { | |
609 | const char *v; | |
610 | ||
611 | assert(d); | |
612 | ||
613 | if (arg_mount_type) | |
614 | return 0; | |
615 | ||
616 | v = udev_device_get_property_value(d, "ID_FS_TYPE"); | |
617 | if (isempty(v)) | |
618 | return 0; | |
619 | ||
620 | arg_mount_type = strdup(v); | |
621 | if (!arg_mount_type) | |
622 | return log_oom(); | |
623 | ||
624 | log_debug("Discovered type=%s", arg_mount_type); | |
625 | return 1; | |
626 | } | |
627 | ||
628 | static int acquire_mount_options(struct udev_device *d) { | |
629 | const char *v; | |
630 | ||
631 | if (arg_mount_options) | |
632 | return 0; | |
633 | ||
634 | v = udev_device_get_property_value(d, "SYSTEMD_MOUNT_OPTIONS"); | |
635 | if (isempty(v)) | |
636 | return 0; | |
637 | ||
638 | arg_mount_options = strdup(v); | |
639 | if (!arg_mount_options) | |
640 | return log_oom(); | |
641 | ||
642 | log_debug("Discovered options=%s", arg_mount_options); | |
643 | return 1; | |
644 | } | |
645 | ||
646 | static const char *get_model(struct udev_device *d) { | |
647 | const char *model; | |
648 | ||
649 | assert(d); | |
650 | ||
651 | model = udev_device_get_property_value(d, "ID_MODEL_FROM_DATABASE"); | |
652 | if (model) | |
653 | return model; | |
654 | ||
655 | return udev_device_get_property_value(d, "ID_MODEL"); | |
656 | } | |
657 | ||
658 | static const char* get_label(struct udev_device *d) { | |
659 | const char *label; | |
660 | ||
661 | assert(d); | |
662 | ||
663 | label = udev_device_get_property_value(d, "ID_FS_LABEL"); | |
664 | if (label) | |
665 | return label; | |
666 | ||
667 | return udev_device_get_property_value(d, "ID_PART_ENTRY_NAME"); | |
668 | } | |
669 | ||
670 | static int acquire_mount_where(struct udev_device *d) { | |
671 | const char *v; | |
672 | ||
673 | if (arg_mount_where) | |
674 | return 0; | |
675 | ||
676 | v = udev_device_get_property_value(d, "SYSTEMD_MOUNT_WHERE"); | |
677 | if (isempty(v)) { | |
678 | _cleanup_free_ char *escaped = NULL; | |
679 | const char *name; | |
680 | ||
681 | name = get_label(d); | |
682 | if (!name) | |
683 | name = get_model(d); | |
684 | if (!name) { | |
685 | const char *dn; | |
686 | ||
687 | dn = udev_device_get_devnode(d); | |
688 | if (!dn) | |
689 | return 0; | |
690 | ||
691 | name = basename(dn); | |
692 | } | |
693 | ||
694 | escaped = xescape(name, "\\"); | |
695 | if (!filename_is_valid(escaped)) | |
696 | return 0; | |
697 | ||
698 | arg_mount_where = strjoin("/run/media/system/", escaped, NULL); | |
699 | } else | |
700 | arg_mount_where = strdup(v); | |
701 | ||
702 | if (!arg_mount_where) | |
703 | return log_oom(); | |
704 | ||
705 | log_debug("Discovered where=%s", arg_mount_where); | |
706 | return 1; | |
707 | } | |
708 | ||
709 | static int acquire_description(struct udev_device *d) { | |
710 | const char *model, *label; | |
711 | ||
712 | if (arg_description) | |
713 | return 0; | |
714 | ||
715 | model = get_model(d); | |
716 | ||
717 | label = get_label(d); | |
718 | if (!label) | |
719 | label = udev_device_get_property_value(d, "ID_PART_ENTRY_NUMBER"); | |
720 | ||
721 | if (model && label) | |
722 | arg_description = strjoin(model, " ", label, NULL); | |
723 | else if (label) | |
724 | arg_description = strdup(label); | |
725 | else if (model) | |
726 | arg_description = strdup(model); | |
727 | else | |
728 | return NULL; | |
729 | ||
730 | if (!arg_description) | |
731 | return log_oom(); | |
732 | ||
733 | log_debug("Discovered description=%s", arg_description); | |
734 | return 1; | |
735 | } | |
736 | ||
737 | static int acquire_removable(struct udev_device *d) { | |
738 | const char *v; | |
739 | ||
740 | /* Shortcut this if there's no reason to check it */ | |
741 | if (arg_action != ACTION_DEFAULT && arg_timeout_idle_set && arg_bind_device >= 0) | |
742 | return 0; | |
743 | ||
744 | for (;;) { | |
745 | v = udev_device_get_sysattr_value(d, "removable"); | |
746 | if (v) | |
747 | break; | |
748 | ||
749 | d = udev_device_get_parent(d); | |
750 | if (!d) | |
751 | return 0; | |
752 | ||
753 | if (!streq_ptr(udev_device_get_subsystem(d), "block")) | |
754 | return 0; | |
755 | } | |
756 | ||
757 | if (parse_boolean(v) <= 0) | |
758 | return 0; | |
759 | ||
760 | log_debug("Discovered removable device."); | |
761 | ||
762 | if (arg_action == ACTION_DEFAULT) { | |
763 | log_debug("Automatically turning on automount."); | |
764 | arg_action = ACTION_AUTOMOUNT; | |
765 | } | |
766 | ||
767 | if (!arg_timeout_idle_set) { | |
768 | log_debug("Setting idle timeout to 1s."); | |
769 | arg_timeout_idle = USEC_PER_SEC; | |
770 | } | |
771 | ||
772 | if (arg_bind_device < 0) { | |
773 | log_debug("Binding automount unit to device."); | |
774 | arg_bind_device = true; | |
775 | } | |
776 | ||
777 | return 1; | |
778 | } | |
779 | ||
780 | static int discover_device(void) { | |
781 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
782 | _cleanup_udev_unref_ struct udev *udev = NULL; | |
783 | struct stat st; | |
784 | const char *v; | |
785 | int r; | |
786 | ||
787 | if (!arg_discover) | |
788 | return 0; | |
789 | ||
790 | if (!is_device_path(arg_mount_what)) { | |
791 | log_error("Discovery only supported for block devices, don't know what to do."); | |
792 | return -EINVAL; | |
793 | } | |
794 | ||
795 | if (stat(arg_mount_what, &st) < 0) | |
796 | return log_error_errno(errno, "Can't stat %s: %m", arg_mount_what); | |
797 | ||
798 | if (!S_ISBLK(st.st_mode)) { | |
799 | log_error("Path %s is not a block device, don't know what to do.", arg_mount_what); | |
800 | return -ENOTBLK; | |
801 | } | |
802 | ||
803 | udev = udev_new(); | |
804 | if (!udev) | |
805 | return log_oom(); | |
806 | ||
807 | d = udev_device_new_from_devnum(udev, 'b', st.st_rdev); | |
808 | if (!d) | |
809 | return log_oom(); | |
810 | ||
811 | v = udev_device_get_property_value(d, "ID_FS_USAGE"); | |
812 | if (!streq_ptr(v, "filesystem")) { | |
813 | log_error("%s does not contain a file system.", arg_mount_what); | |
814 | return -EINVAL; | |
815 | } | |
816 | ||
817 | r = acquire_mount_type(d); | |
818 | if (r < 0) | |
819 | return r; | |
820 | ||
821 | r = acquire_mount_options(d); | |
822 | if (r < 0) | |
823 | return r; | |
824 | ||
825 | r = acquire_mount_where(d); | |
826 | if (r < 0) | |
827 | return r; | |
828 | ||
829 | r = acquire_description(d); | |
830 | if (r < 0) | |
831 | return r; | |
832 | ||
833 | r = acquire_removable(d); | |
834 | if (r < 0) | |
835 | return r; | |
836 | ||
837 | return 0; | |
838 | } | |
839 | ||
840 | enum { | |
841 | COLUMN_NODE, | |
842 | COLUMN_PATH, | |
843 | COLUMN_MODEL, | |
844 | COLUMN_WWN, | |
845 | COLUMN_FSTYPE, | |
846 | COLUMN_LABEL, | |
847 | COLUMN_UUID, | |
848 | _COLUMN_MAX, | |
849 | }; | |
850 | ||
851 | struct item { | |
852 | char* columns[_COLUMN_MAX]; | |
853 | }; | |
854 | ||
855 | static int compare_item(const void *a, const void *b) { | |
856 | const struct item *x = a, *y = b; | |
857 | ||
858 | if (x->columns[COLUMN_NODE] == y->columns[COLUMN_NODE]) | |
859 | return 0; | |
860 | if (!x->columns[COLUMN_NODE]) | |
861 | return 1; | |
862 | if (!y->columns[COLUMN_NODE]) | |
863 | return -1; | |
864 | ||
865 | return path_compare(x->columns[COLUMN_NODE], y->columns[COLUMN_NODE]); | |
866 | } | |
867 | ||
868 | static int list_devices(void) { | |
869 | ||
870 | static const char * const titles[_COLUMN_MAX] = { | |
871 | [COLUMN_NODE] = "NODE", | |
872 | [COLUMN_PATH] = "PATH", | |
873 | [COLUMN_MODEL] = "MODEL", | |
874 | [COLUMN_WWN] = "WWN", | |
875 | [COLUMN_FSTYPE] = "TYPE", | |
876 | [COLUMN_LABEL] = "LABEL", | |
877 | [COLUMN_UUID] = "UUID" | |
878 | }; | |
879 | ||
880 | _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; | |
881 | _cleanup_udev_unref_ struct udev *udev = NULL; | |
882 | struct udev_list_entry *item = NULL, *first = NULL; | |
883 | size_t n_allocated = 0, n = 0, i; | |
884 | size_t column_width[_COLUMN_MAX]; | |
885 | struct item *items = NULL; | |
886 | unsigned c; | |
887 | int r; | |
888 | ||
889 | for (c = 0; c < _COLUMN_MAX; c++) | |
890 | column_width[c] = strlen(titles[c]); | |
891 | ||
892 | udev = udev_new(); | |
893 | if (!udev) | |
894 | return log_oom(); | |
895 | ||
896 | e = udev_enumerate_new(udev); | |
897 | if (!e) | |
898 | return log_oom(); | |
899 | ||
900 | r = udev_enumerate_add_match_subsystem(e, "block"); | |
901 | if (r < 0) | |
902 | return log_error_errno(r, "Failed to add block match: %m"); | |
903 | ||
904 | r = udev_enumerate_add_match_property(e, "ID_FS_USAGE", "filesystem"); | |
905 | if (r < 0) | |
906 | return log_error_errno(r, "Failed to add property match: %m"); | |
907 | ||
908 | r = udev_enumerate_scan_devices(e); | |
909 | if (r < 0) | |
910 | return log_error_errno(r, "Failed to scan devices: %m"); | |
911 | ||
912 | first = udev_enumerate_get_list_entry(e); | |
913 | udev_list_entry_foreach(item, first) { | |
914 | _cleanup_udev_device_unref_ struct udev_device *d; | |
915 | struct item *j; | |
916 | ||
917 | d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); | |
918 | if (!d) { | |
919 | r = log_oom(); | |
920 | goto finish; | |
921 | } | |
922 | ||
923 | if (!GREEDY_REALLOC0(items, n_allocated, n+1)) { | |
924 | r = log_oom(); | |
925 | goto finish; | |
926 | } | |
927 | ||
928 | j = items + n++; | |
929 | ||
930 | for (c = 0; c < _COLUMN_MAX; c++) { | |
931 | const char *x; | |
932 | size_t k; | |
933 | ||
934 | switch (c) { | |
935 | ||
936 | case COLUMN_NODE: | |
937 | x = udev_device_get_devnode(d); | |
938 | break; | |
939 | ||
940 | case COLUMN_PATH: | |
941 | x = udev_device_get_property_value(d, "ID_PATH"); | |
942 | break; | |
943 | ||
944 | case COLUMN_MODEL: | |
945 | x = get_model(d); | |
946 | break; | |
947 | ||
948 | case COLUMN_WWN: | |
949 | x = udev_device_get_property_value(d, "ID_WWN"); | |
950 | break; | |
951 | ||
952 | case COLUMN_FSTYPE: | |
953 | x = udev_device_get_property_value(d, "ID_FS_TYPE"); | |
954 | break; | |
955 | ||
956 | case COLUMN_LABEL: | |
957 | x = get_label(d); | |
958 | break; | |
959 | ||
960 | case COLUMN_UUID: | |
961 | x = udev_device_get_property_value(d, "ID_FS_UUID"); | |
962 | break; | |
963 | } | |
964 | ||
965 | if (isempty(x)) | |
966 | continue; | |
967 | ||
968 | j->columns[c] = strdup(x); | |
969 | if (!j->columns[c]) { | |
970 | r = log_oom(); | |
971 | goto finish; | |
972 | } | |
973 | ||
974 | k = strlen(x); | |
975 | if (k > column_width[c]) | |
976 | column_width[c] = k; | |
977 | } | |
978 | } | |
979 | ||
980 | if (n == 0) { | |
981 | log_info("No devices found."); | |
982 | goto finish; | |
983 | } | |
984 | ||
985 | qsort_safe(items, n, sizeof(struct item), compare_item); | |
986 | ||
987 | pager_open(arg_no_pager, false); | |
988 | ||
989 | fputs(ansi_underline(), stdout); | |
990 | for (c = 0; c < _COLUMN_MAX; c++) { | |
991 | if (c > 0) | |
992 | fputc(' ', stdout); | |
993 | ||
994 | printf("%-*s", (int) column_width[c], titles[c]); | |
995 | } | |
996 | fputs(ansi_normal(), stdout); | |
997 | fputc('\n', stdout); | |
998 | ||
999 | for (i = 0; i < n; i++) { | |
1000 | for (c = 0; c < _COLUMN_MAX; c++) { | |
1001 | if (c > 0) | |
1002 | fputc(' ', stdout); | |
1003 | ||
1004 | printf("%-*s", (int) column_width[c], strna(items[i].columns[c])); | |
1005 | } | |
1006 | fputc('\n', stdout); | |
1007 | } | |
1008 | ||
1009 | r = 0; | |
1010 | ||
1011 | finish: | |
1012 | for (i = 0; i < n; i++) | |
1013 | for (c = 0; c < _COLUMN_MAX; c++) | |
1014 | free(items[i].columns[c]); | |
1015 | ||
1016 | free(items); | |
1017 | return r; | |
1018 | } | |
1019 | ||
1020 | int main(int argc, char* argv[]) { | |
1021 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
1022 | int r; | |
1023 | ||
1024 | log_parse_environment(); | |
1025 | log_open(); | |
1026 | ||
1027 | r = parse_argv(argc, argv); | |
1028 | if (r <= 0) | |
1029 | goto finish; | |
1030 | ||
1031 | if (arg_action == ACTION_LIST) { | |
1032 | r = list_devices(); | |
1033 | goto finish; | |
1034 | } | |
1035 | ||
1036 | r = discover_device(); | |
1037 | if (r < 0) | |
1038 | goto finish; | |
1039 | if (!arg_mount_where) { | |
1040 | log_error("Can't figure out where to mount %s.", arg_mount_what); | |
1041 | r = -EINVAL; | |
1042 | goto finish; | |
1043 | } | |
1044 | ||
1045 | path_kill_slashes(arg_mount_where); | |
1046 | ||
1047 | if (path_equal(arg_mount_where, "/")) { | |
1048 | log_error("Refusing to operate on root directory."); | |
1049 | r = -EINVAL; | |
1050 | goto finish; | |
1051 | } | |
1052 | ||
1053 | if (!path_is_safe(arg_mount_where)) { | |
1054 | log_error("Path is contains unsafe components."); | |
1055 | r = -EINVAL; | |
1056 | goto finish; | |
1057 | } | |
1058 | ||
1059 | if (streq_ptr(arg_mount_type, "auto")) | |
1060 | arg_mount_type = mfree(arg_mount_type); | |
1061 | if (streq_ptr(arg_mount_options, "defaults")) | |
1062 | arg_mount_options = mfree(arg_mount_options); | |
1063 | ||
1064 | if (!is_device_path(arg_mount_what)) | |
1065 | arg_fsck = false; | |
1066 | ||
1067 | if (arg_fsck && arg_mount_type && arg_transport == BUS_TRANSPORT_LOCAL) { | |
1068 | r = fsck_exists(arg_mount_type); | |
1069 | if (r < 0) | |
1070 | log_warning_errno(r, "Couldn't determine whether fsck for %s exists, proceeding anyway.", arg_mount_type); | |
1071 | else if (r == 0) { | |
1072 | log_debug("Disabling file system check as fsck for %s doesn't exist.", arg_mount_type); | |
1073 | arg_fsck = false; /* fsck doesn't exist, let's not attempt it */ | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | r = bus_connect_transport_systemd(arg_transport, arg_host, arg_user, &bus); | |
1078 | if (r < 0) { | |
1079 | log_error_errno(r, "Failed to create bus connection: %m"); | |
1080 | goto finish; | |
1081 | } | |
1082 | ||
1083 | switch (arg_action) { | |
1084 | ||
1085 | case ACTION_MOUNT: | |
1086 | case ACTION_DEFAULT: | |
1087 | r = start_transient_mount(bus, argv + optind); | |
1088 | break; | |
1089 | ||
1090 | case ACTION_AUTOMOUNT: | |
1091 | r = start_transient_automount(bus, argv + optind); | |
1092 | break; | |
1093 | ||
1094 | default: | |
1095 | assert_not_reached("Unexpected action."); | |
1096 | } | |
1097 | ||
1098 | finish: | |
1099 | bus = sd_bus_flush_close_unref(bus); | |
1100 | ||
1101 | pager_close(); | |
1102 | ||
1103 | free(arg_mount_what); | |
1104 | free(arg_mount_where); | |
1105 | free(arg_mount_type); | |
1106 | free(arg_mount_options); | |
1107 | free(arg_description); | |
1108 | strv_free(arg_property); | |
1109 | strv_free(arg_automount_property); | |
1110 | ||
1111 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1112 | } |