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path-util: introduce path_simplify()
[thirdparty/systemd.git] / src / mount / mount-tool.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2 /***
3 This file is part of systemd.
4
5 Copyright 2016 Lennart Poettering
6 ***/
7
8 #include <getopt.h>
9
10 #include "libudev.h"
11 #include "sd-bus.h"
12
13 #include "bus-error.h"
14 #include "bus-unit-util.h"
15 #include "bus-util.h"
16 #include "dirent-util.h"
17 #include "escape.h"
18 #include "fd-util.h"
19 #include "fileio.h"
20 #include "fs-util.h"
21 #include "fstab-util.h"
22 #include "mount-util.h"
23 #include "pager.h"
24 #include "parse-util.h"
25 #include "path-util.h"
26 #include "spawn-polkit-agent.h"
27 #include "stat-util.h"
28 #include "strv.h"
29 #include "udev-util.h"
30 #include "unit-def.h"
31 #include "unit-name.h"
32 #include "user-util.h"
33 #include "terminal-util.h"
34
35 enum {
36 ACTION_DEFAULT,
37 ACTION_MOUNT,
38 ACTION_AUTOMOUNT,
39 ACTION_UMOUNT,
40 ACTION_LIST,
41 } arg_action = ACTION_DEFAULT;
42
43 static bool arg_no_block = false;
44 static bool arg_no_pager = false;
45 static bool arg_ask_password = true;
46 static bool arg_quiet = false;
47 static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
48 static bool arg_user = false;
49 static const char *arg_host = NULL;
50 static bool arg_discover = false;
51 static char *arg_mount_what = NULL;
52 static char *arg_mount_where = NULL;
53 static char *arg_mount_type = NULL;
54 static char *arg_mount_options = NULL;
55 static char *arg_description = NULL;
56 static char **arg_property = NULL;
57 static usec_t arg_timeout_idle = USEC_INFINITY;
58 static bool arg_timeout_idle_set = false;
59 static char **arg_automount_property = NULL;
60 static int arg_bind_device = -1;
61 static uid_t arg_uid = UID_INVALID;
62 static gid_t arg_gid = GID_INVALID;
63 static bool arg_fsck = true;
64 static bool arg_aggressive_gc = false;
65
66 static void help(void) {
67 printf("systemd-mount [OPTIONS...] WHAT [WHERE]\n"
68 "systemd-mount [OPTIONS...] --list\n"
69 "%s [OPTIONS...] %sWHAT|WHERE...\n\n"
70 "Establish a mount or auto-mount point transiently.\n\n"
71 " -h --help Show this help\n"
72 " --version Show package version\n"
73 " --no-block Do not wait until operation finished\n"
74 " --no-pager Do not pipe output into a pager\n"
75 " --no-ask-password Do not prompt for password\n"
76 " -q --quiet Suppress information messages during runtime\n"
77 " --user Run as user unit\n"
78 " -H --host=[USER@]HOST Operate on remote host\n"
79 " -M --machine=CONTAINER Operate on local container\n"
80 " --discover Discover mount device metadata\n"
81 " -t --type=TYPE File system type\n"
82 " -o --options=OPTIONS Mount options\n"
83 " --owner=USER Add uid= and gid= options for USER\n"
84 " --fsck=no Don't run file system check before mount\n"
85 " --description=TEXT Description for unit\n"
86 " -p --property=NAME=VALUE Set mount unit property\n"
87 " -A --automount=BOOL Create an auto-mount point\n"
88 " --timeout-idle-sec=SEC Specify automount idle timeout\n"
89 " --automount-property=NAME=VALUE\n"
90 " Set automount unit property\n"
91 " --bind-device Bind automount unit to device\n"
92 " --list List mountable block devices\n"
93 " -u --umount Unmount mount points\n"
94 " -G --collect Unload unit after it stopped, even when failed\n",
95 program_invocation_short_name,
96 streq(program_invocation_short_name, "systemd-umount") ? "" : "--umount ");
97 }
98
99 static int parse_argv(int argc, char *argv[]) {
100
101 enum {
102 ARG_VERSION = 0x100,
103 ARG_NO_BLOCK,
104 ARG_NO_PAGER,
105 ARG_NO_ASK_PASSWORD,
106 ARG_USER,
107 ARG_SYSTEM,
108 ARG_DISCOVER,
109 ARG_MOUNT_TYPE,
110 ARG_MOUNT_OPTIONS,
111 ARG_OWNER,
112 ARG_FSCK,
113 ARG_DESCRIPTION,
114 ARG_TIMEOUT_IDLE,
115 ARG_AUTOMOUNT,
116 ARG_AUTOMOUNT_PROPERTY,
117 ARG_BIND_DEVICE,
118 ARG_LIST,
119 };
120
121 static const struct option options[] = {
122 { "help", no_argument, NULL, 'h' },
123 { "version", no_argument, NULL, ARG_VERSION },
124 { "no-block", no_argument, NULL, ARG_NO_BLOCK },
125 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
126 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
127 { "quiet", no_argument, NULL, 'q' },
128 { "user", no_argument, NULL, ARG_USER },
129 { "system", no_argument, NULL, ARG_SYSTEM },
130 { "host", required_argument, NULL, 'H' },
131 { "machine", required_argument, NULL, 'M' },
132 { "discover", no_argument, NULL, ARG_DISCOVER },
133 { "type", required_argument, NULL, 't' },
134 { "options", required_argument, NULL, 'o' },
135 { "owner", required_argument, NULL, ARG_OWNER },
136 { "fsck", required_argument, NULL, ARG_FSCK },
137 { "description", required_argument, NULL, ARG_DESCRIPTION },
138 { "property", required_argument, NULL, 'p' },
139 { "automount", required_argument, NULL, ARG_AUTOMOUNT },
140 { "timeout-idle-sec", required_argument, NULL, ARG_TIMEOUT_IDLE },
141 { "automount-property", required_argument, NULL, ARG_AUTOMOUNT_PROPERTY },
142 { "bind-device", no_argument, NULL, ARG_BIND_DEVICE },
143 { "list", no_argument, NULL, ARG_LIST },
144 { "umount", no_argument, NULL, 'u' },
145 { "unmount", no_argument, NULL, 'u' },
146 { "collect", no_argument, NULL, 'G' },
147 {},
148 };
149
150 int r, c;
151
152 assert(argc >= 0);
153 assert(argv);
154
155 if (strstr(program_invocation_short_name, "systemd-umount"))
156 arg_action = ACTION_UMOUNT;
157
158 while ((c = getopt_long(argc, argv, "hqH:M:t:o:p:AuG", options, NULL)) >= 0)
159
160 switch (c) {
161
162 case 'h':
163 help();
164 return 0;
165
166 case ARG_VERSION:
167 return version();
168
169 case ARG_NO_BLOCK:
170 arg_no_block = true;
171 break;
172
173 case ARG_NO_PAGER:
174 arg_no_pager = true;
175 break;
176
177 case ARG_NO_ASK_PASSWORD:
178 arg_ask_password = false;
179 break;
180
181 case 'q':
182 arg_quiet = true;
183 break;
184
185 case ARG_USER:
186 arg_user = true;
187 break;
188
189 case ARG_SYSTEM:
190 arg_user = false;
191 break;
192
193 case 'H':
194 arg_transport = BUS_TRANSPORT_REMOTE;
195 arg_host = optarg;
196 break;
197
198 case 'M':
199 arg_transport = BUS_TRANSPORT_MACHINE;
200 arg_host = optarg;
201 break;
202
203 case ARG_DISCOVER:
204 arg_discover = true;
205 break;
206
207 case 't':
208 if (free_and_strdup(&arg_mount_type, optarg) < 0)
209 return log_oom();
210 break;
211
212 case 'o':
213 if (free_and_strdup(&arg_mount_options, optarg) < 0)
214 return log_oom();
215 break;
216
217 case ARG_OWNER: {
218 const char *user = optarg;
219
220 r = get_user_creds(&user, &arg_uid, &arg_gid, NULL, NULL);
221 if (r < 0)
222 return log_error_errno(r,
223 r == -EBADMSG ? "UID or GID of user %s are invalid."
224 : "Cannot use \"%s\" as owner: %m",
225 optarg);
226 break;
227 }
228
229 case ARG_FSCK:
230 r = parse_boolean(optarg);
231 if (r < 0)
232 return log_error_errno(r, "Failed to parse --fsck= argument: %s", optarg);
233
234 arg_fsck = r;
235 break;
236
237 case ARG_DESCRIPTION:
238 if (free_and_strdup(&arg_description, optarg) < 0)
239 return log_oom();
240 break;
241
242 case 'p':
243 if (strv_extend(&arg_property, optarg) < 0)
244 return log_oom();
245
246 break;
247
248 case 'A':
249 arg_action = ACTION_AUTOMOUNT;
250 break;
251
252 case ARG_AUTOMOUNT:
253 r = parse_boolean(optarg);
254 if (r < 0)
255 return log_error_errno(r, "--automount= expects a valid boolean parameter: %s", optarg);
256
257 arg_action = r ? ACTION_AUTOMOUNT : ACTION_MOUNT;
258 break;
259
260 case ARG_TIMEOUT_IDLE:
261 r = parse_sec(optarg, &arg_timeout_idle);
262 if (r < 0)
263 return log_error_errno(r, "Failed to parse timeout: %s", optarg);
264
265 break;
266
267 case ARG_AUTOMOUNT_PROPERTY:
268 if (strv_extend(&arg_automount_property, optarg) < 0)
269 return log_oom();
270
271 break;
272
273 case ARG_BIND_DEVICE:
274 arg_bind_device = true;
275 break;
276
277 case ARG_LIST:
278 arg_action = ACTION_LIST;
279 break;
280
281 case 'u':
282 arg_action = ACTION_UMOUNT;
283 break;
284
285 case 'G':
286 arg_aggressive_gc = true;
287 break;
288
289 case '?':
290 return -EINVAL;
291
292 default:
293 assert_not_reached("Unhandled option");
294 }
295
296 if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL) {
297 log_error("Execution in user context is not supported on non-local systems.");
298 return -EINVAL;
299 }
300
301 if (arg_action == ACTION_LIST) {
302 if (optind < argc) {
303 log_error("Too many arguments.");
304 return -EINVAL;
305 }
306
307 if (arg_transport != BUS_TRANSPORT_LOCAL) {
308 log_error("Listing devices only supported locally.");
309 return -EOPNOTSUPP;
310 }
311 } else if (arg_action == ACTION_UMOUNT) {
312 if (optind >= argc) {
313 log_error("At least one argument required.");
314 return -EINVAL;
315 }
316
317 if (arg_transport != BUS_TRANSPORT_LOCAL) {
318 int i;
319
320 for (i = optind; i < argc; i++)
321 if (!path_is_absolute(argv[i]) ) {
322 log_error("Only absolute path is supported: %s", argv[i]);
323 return -EINVAL;
324 }
325 }
326 } else {
327 if (optind >= argc) {
328 log_error("At least one argument required.");
329 return -EINVAL;
330 }
331
332 if (argc > optind+2) {
333 log_error("At most two arguments required.");
334 return -EINVAL;
335 }
336
337 if (arg_mount_type && (fstype_is_api_vfs(arg_mount_type) || fstype_is_network(arg_mount_type))) {
338 arg_mount_what = strdup(argv[optind]);
339 if (!arg_mount_what)
340 return log_oom();
341
342 } else if (arg_transport == BUS_TRANSPORT_LOCAL) {
343 _cleanup_free_ char *u = NULL;
344
345 u = fstab_node_to_udev_node(argv[optind]);
346 if (!u)
347 return log_oom();
348
349 r = chase_symlinks(u, NULL, 0, &arg_mount_what);
350 if (r < 0)
351 return log_error_errno(r, "Failed to make path %s absolute: %m", u);
352 } else {
353 arg_mount_what = strdup(argv[optind]);
354 if (!arg_mount_what)
355 return log_oom();
356
357 path_simplify(arg_mount_what, false);
358
359 if (!path_is_absolute(arg_mount_what)) {
360 log_error("Only absolute path is supported: %s", arg_mount_what);
361 return -EINVAL;
362 }
363 }
364
365 if (argc > optind+1) {
366 if (arg_transport == BUS_TRANSPORT_LOCAL) {
367 r = chase_symlinks(argv[optind+1], NULL, CHASE_NONEXISTENT, &arg_mount_where);
368 if (r < 0)
369 return log_error_errno(r, "Failed to make path %s absolute: %m", argv[optind+1]);
370 } else {
371 arg_mount_where = strdup(argv[optind+1]);
372 if (!arg_mount_where)
373 return log_oom();
374
375 path_simplify(arg_mount_where, false);
376
377 if (!path_is_absolute(arg_mount_where)) {
378 log_error("Only absolute path is supported: %s", arg_mount_where);
379 return -EINVAL;
380 }
381 }
382 } else
383 arg_discover = true;
384
385 if (arg_discover && arg_transport != BUS_TRANSPORT_LOCAL) {
386 log_error("Automatic mount location discovery is only supported locally.");
387 return -EOPNOTSUPP;
388 }
389 }
390
391 return 1;
392 }
393
394 static int transient_unit_set_properties(sd_bus_message *m, UnitType t, char **properties) {
395 int r;
396
397 if (!isempty(arg_description)) {
398 r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description);
399 if (r < 0)
400 return r;
401 }
402
403 if (arg_bind_device && is_device_path(arg_mount_what)) {
404 _cleanup_free_ char *device_unit = NULL;
405
406 r = unit_name_from_path(arg_mount_what, ".device", &device_unit);
407 if (r < 0)
408 return r;
409
410 r = sd_bus_message_append(m, "(sv)(sv)",
411 "After", "as", 1, device_unit,
412 "BindsTo", "as", 1, device_unit);
413 if (r < 0)
414 return r;
415 }
416
417 if (arg_aggressive_gc) {
418 r = sd_bus_message_append(m, "(sv)", "CollectMode", "s", "inactive-or-failed");
419 if (r < 0)
420 return r;
421 }
422
423 r = bus_append_unit_property_assignment_many(m, t, properties);
424 if (r < 0)
425 return r;
426
427 return 0;
428 }
429
430 static int transient_mount_set_properties(sd_bus_message *m) {
431 _cleanup_free_ char *options = NULL;
432 int r;
433
434 assert(m);
435
436 r = transient_unit_set_properties(m, UNIT_MOUNT, arg_property);
437 if (r < 0)
438 return r;
439
440 if (arg_mount_what) {
441 r = sd_bus_message_append(m, "(sv)", "What", "s", arg_mount_what);
442 if (r < 0)
443 return r;
444 }
445
446 if (arg_mount_type) {
447 r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_mount_type);
448 if (r < 0)
449 return r;
450 }
451
452 /* Prepend uid=…,gid=… if arg_uid is set */
453 if (arg_uid != UID_INVALID) {
454 r = asprintf(&options,
455 "uid=" UID_FMT ",gid=" GID_FMT "%s%s",
456 arg_uid, arg_gid,
457 arg_mount_options ? "," : "", arg_mount_options);
458 if (r < 0)
459 return -ENOMEM;
460 }
461
462 if (options || arg_mount_options) {
463 log_debug("Using mount options: %s", options ?: arg_mount_options);
464
465 r = sd_bus_message_append(m, "(sv)", "Options", "s", options ?: arg_mount_options);
466 if (r < 0)
467 return r;
468 } else
469 log_debug("Not using any mount options");
470
471 if (arg_fsck) {
472 _cleanup_free_ char *fsck = NULL;
473
474 r = unit_name_from_path_instance("systemd-fsck", arg_mount_what, ".service", &fsck);
475 if (r < 0)
476 return r;
477
478 r = sd_bus_message_append(m,
479 "(sv)(sv)",
480 "Requires", "as", 1, fsck,
481 "After", "as", 1, fsck);
482 if (r < 0)
483 return r;
484 }
485
486 return 0;
487 }
488
489 static int transient_automount_set_properties(sd_bus_message *m) {
490 int r;
491
492 assert(m);
493
494 r = transient_unit_set_properties(m, UNIT_AUTOMOUNT, arg_automount_property);
495 if (r < 0)
496 return r;
497
498 if (arg_timeout_idle != USEC_INFINITY) {
499 r = sd_bus_message_append(m, "(sv)", "TimeoutIdleUSec", "t", arg_timeout_idle);
500 if (r < 0)
501 return r;
502 }
503
504 return 0;
505 }
506
507 static int start_transient_mount(
508 sd_bus *bus,
509 char **argv) {
510
511 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
512 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
513 _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
514 _cleanup_free_ char *mount_unit = NULL;
515 int r;
516
517 if (!arg_no_block) {
518 r = bus_wait_for_jobs_new(bus, &w);
519 if (r < 0)
520 return log_error_errno(r, "Could not watch jobs: %m");
521 }
522
523 r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit);
524 if (r < 0)
525 return log_error_errno(r, "Failed to make mount unit name: %m");
526
527 r = sd_bus_message_new_method_call(
528 bus,
529 &m,
530 "org.freedesktop.systemd1",
531 "/org/freedesktop/systemd1",
532 "org.freedesktop.systemd1.Manager",
533 "StartTransientUnit");
534 if (r < 0)
535 return bus_log_create_error(r);
536
537 r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
538 if (r < 0)
539 return bus_log_create_error(r);
540
541 /* Name and mode */
542 r = sd_bus_message_append(m, "ss", mount_unit, "fail");
543 if (r < 0)
544 return bus_log_create_error(r);
545
546 /* Properties */
547 r = sd_bus_message_open_container(m, 'a', "(sv)");
548 if (r < 0)
549 return bus_log_create_error(r);
550
551 r = transient_mount_set_properties(m);
552 if (r < 0)
553 return bus_log_create_error(r);
554
555 r = sd_bus_message_close_container(m);
556 if (r < 0)
557 return bus_log_create_error(r);
558
559 /* Auxiliary units */
560 r = sd_bus_message_append(m, "a(sa(sv))", 0);
561 if (r < 0)
562 return bus_log_create_error(r);
563
564 polkit_agent_open_if_enabled(arg_transport, arg_ask_password);
565
566 r = sd_bus_call(bus, m, 0, &error, &reply);
567 if (r < 0)
568 return log_error_errno(r, "Failed to start transient mount unit: %s", bus_error_message(&error, r));
569
570 if (w) {
571 const char *object;
572
573 r = sd_bus_message_read(reply, "o", &object);
574 if (r < 0)
575 return bus_log_parse_error(r);
576
577 r = bus_wait_for_jobs_one(w, object, arg_quiet);
578 if (r < 0)
579 return r;
580 }
581
582 if (!arg_quiet)
583 log_info("Started unit %s%s%s for mount point: %s%s%s",
584 ansi_highlight(), mount_unit, ansi_normal(),
585 ansi_highlight(), arg_mount_where, ansi_normal());
586
587 return 0;
588 }
589
590 static int start_transient_automount(
591 sd_bus *bus,
592 char **argv) {
593
594 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
595 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
596 _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
597 _cleanup_free_ char *automount_unit = NULL, *mount_unit = NULL;
598 int r;
599
600 if (!arg_no_block) {
601 r = bus_wait_for_jobs_new(bus, &w);
602 if (r < 0)
603 return log_error_errno(r, "Could not watch jobs: %m");
604 }
605
606 r = unit_name_from_path(arg_mount_where, ".automount", &automount_unit);
607 if (r < 0)
608 return log_error_errno(r, "Failed to make automount unit name: %m");
609
610 r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit);
611 if (r < 0)
612 return log_error_errno(r, "Failed to make mount unit name: %m");
613
614 r = sd_bus_message_new_method_call(
615 bus,
616 &m,
617 "org.freedesktop.systemd1",
618 "/org/freedesktop/systemd1",
619 "org.freedesktop.systemd1.Manager",
620 "StartTransientUnit");
621 if (r < 0)
622 return bus_log_create_error(r);
623
624 r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
625 if (r < 0)
626 return bus_log_create_error(r);
627
628 /* Name and mode */
629 r = sd_bus_message_append(m, "ss", automount_unit, "fail");
630 if (r < 0)
631 return bus_log_create_error(r);
632
633 /* Properties */
634 r = sd_bus_message_open_container(m, 'a', "(sv)");
635 if (r < 0)
636 return bus_log_create_error(r);
637
638 r = transient_automount_set_properties(m);
639 if (r < 0)
640 return bus_log_create_error(r);
641
642 r = sd_bus_message_close_container(m);
643 if (r < 0)
644 return bus_log_create_error(r);
645
646 /* Auxiliary units */
647 r = sd_bus_message_open_container(m, 'a', "(sa(sv))");
648 if (r < 0)
649 return bus_log_create_error(r);
650
651 r = sd_bus_message_open_container(m, 'r', "sa(sv)");
652 if (r < 0)
653 return bus_log_create_error(r);
654
655 r = sd_bus_message_append(m, "s", mount_unit);
656 if (r < 0)
657 return bus_log_create_error(r);
658
659 r = sd_bus_message_open_container(m, 'a', "(sv)");
660 if (r < 0)
661 return bus_log_create_error(r);
662
663 r = transient_mount_set_properties(m);
664 if (r < 0)
665 return bus_log_create_error(r);
666
667 r = sd_bus_message_close_container(m);
668 if (r < 0)
669 return bus_log_create_error(r);
670
671 r = sd_bus_message_close_container(m);
672 if (r < 0)
673 return bus_log_create_error(r);
674
675 r = sd_bus_message_close_container(m);
676 if (r < 0)
677 return bus_log_create_error(r);
678
679 polkit_agent_open_if_enabled(arg_transport, arg_ask_password);
680
681 r = sd_bus_call(bus, m, 0, &error, &reply);
682 if (r < 0)
683 return log_error_errno(r, "Failed to start transient automount unit: %s", bus_error_message(&error, r));
684
685 if (w) {
686 const char *object;
687
688 r = sd_bus_message_read(reply, "o", &object);
689 if (r < 0)
690 return bus_log_parse_error(r);
691
692 r = bus_wait_for_jobs_one(w, object, arg_quiet);
693 if (r < 0)
694 return r;
695 }
696
697 if (!arg_quiet)
698 log_info("Started unit %s%s%s for mount point: %s%s%s",
699 ansi_highlight(), automount_unit, ansi_normal(),
700 ansi_highlight(), arg_mount_where, ansi_normal());
701
702 return 0;
703 }
704
705 static int find_mount_points(const char *what, char ***list) {
706 _cleanup_fclose_ FILE *proc_self_mountinfo = NULL;
707 _cleanup_strv_free_ char **l = NULL;
708 size_t bufsize = 0, n = 0;
709
710 assert(what);
711 assert(list);
712
713 /* Returns all mount points obtained from /proc/self/mountinfo in *list,
714 * and the number of mount points as return value. */
715
716 proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
717 if (!proc_self_mountinfo)
718 return log_error_errno(errno, "Can't open /proc/self/mountinfo: %m");
719
720 for (;;) {
721 _cleanup_free_ char *path = NULL, *where = NULL, *dev = NULL;
722 int r;
723
724 r = fscanf(proc_self_mountinfo,
725 "%*s " /* (1) mount id */
726 "%*s " /* (2) parent id */
727 "%*s " /* (3) major:minor */
728 "%*s " /* (4) root */
729 "%ms " /* (5) mount point */
730 "%*s" /* (6) mount options */
731 "%*[^-]" /* (7) optional fields */
732 "- " /* (8) separator */
733 "%*s " /* (9) file system type */
734 "%ms" /* (10) mount source */
735 "%*s" /* (11) mount options 2 */
736 "%*[^\n]", /* some rubbish at the end */
737 &path, &dev);
738 if (r != 2) {
739 if (r == EOF)
740 break;
741
742 continue;
743 }
744
745 if (!streq(what, dev))
746 continue;
747
748 r = cunescape(path, UNESCAPE_RELAX, &where);
749 if (r < 0)
750 continue;
751
752 /* one extra slot is needed for the terminating NULL */
753 if (!GREEDY_REALLOC(l, bufsize, n + 2))
754 return log_oom();
755
756 l[n++] = TAKE_PTR(where);
757 }
758
759 if (!GREEDY_REALLOC(l, bufsize, n + 1))
760 return log_oom();
761
762 l[n] = NULL;
763 *list = TAKE_PTR(l);
764
765 return n;
766 }
767
768 static int find_loop_device(const char *backing_file, char **loop_dev) {
769 _cleanup_closedir_ DIR *d = NULL;
770 struct dirent *de;
771 _cleanup_free_ char *l = NULL;
772
773 assert(backing_file);
774 assert(loop_dev);
775
776 d = opendir("/sys/devices/virtual/block");
777 if (!d)
778 return -errno;
779
780 FOREACH_DIRENT(de, d, return -errno) {
781 _cleanup_free_ char *sys = NULL, *fname = NULL;
782 int r;
783
784 dirent_ensure_type(d, de);
785
786 if (de->d_type != DT_DIR)
787 continue;
788
789 if (!startswith(de->d_name, "loop"))
790 continue;
791
792 sys = strjoin("/sys/devices/virtual/block/", de->d_name, "/loop/backing_file");
793 if (!sys)
794 return -ENOMEM;
795
796 r = read_one_line_file(sys, &fname);
797 if (r < 0) {
798 log_debug_errno(r, "Failed to read %s, ignoring: %m", sys);
799 continue;
800 }
801
802 if (files_same(fname, backing_file, 0) <= 0)
803 continue;
804
805 l = strjoin("/dev/", de->d_name);
806 if (!l)
807 return -ENOMEM;
808
809 break;
810 }
811
812 if (!l)
813 return -ENXIO;
814
815 *loop_dev = TAKE_PTR(l);
816
817 return 0;
818 }
819
820 static int stop_mount(
821 sd_bus *bus,
822 const char *where,
823 const char *suffix) {
824
825 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
826 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
827 _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
828 _cleanup_free_ char *mount_unit = NULL;
829 int r;
830
831 if (!arg_no_block) {
832 r = bus_wait_for_jobs_new(bus, &w);
833 if (r < 0)
834 return log_error_errno(r, "Could not watch jobs: %m");
835 }
836
837 r = unit_name_from_path(where, suffix, &mount_unit);
838 if (r < 0)
839 return log_error_errno(r, "Failed to make %s unit name from path %s: %m", suffix + 1, where);
840
841 r = sd_bus_message_new_method_call(
842 bus,
843 &m,
844 "org.freedesktop.systemd1",
845 "/org/freedesktop/systemd1",
846 "org.freedesktop.systemd1.Manager",
847 "StopUnit");
848 if (r < 0)
849 return bus_log_create_error(r);
850
851 r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
852 if (r < 0)
853 return bus_log_create_error(r);
854
855 /* Name and mode */
856 r = sd_bus_message_append(m, "ss", mount_unit, "fail");
857 if (r < 0)
858 return bus_log_create_error(r);
859
860 polkit_agent_open_if_enabled(arg_transport, arg_ask_password);
861
862 r = sd_bus_call(bus, m, 0, &error, &reply);
863 if (r < 0) {
864 if (streq(suffix, ".automount") &&
865 sd_bus_error_has_name(&error, "org.freedesktop.systemd1.NoSuchUnit"))
866 return 0;
867 return log_error_errno(r, "Failed to stop %s unit: %s", suffix + 1, bus_error_message(&error, r));
868 }
869
870 if (w) {
871 const char *object;
872
873 r = sd_bus_message_read(reply, "o", &object);
874 if (r < 0)
875 return bus_log_parse_error(r);
876
877 r = bus_wait_for_jobs_one(w, object, arg_quiet);
878 if (r < 0)
879 return r;
880 }
881
882 if (!arg_quiet)
883 log_info("Stopped unit %s%s%s for mount point: %s%s%s",
884 ansi_highlight(), mount_unit, ansi_normal(),
885 ansi_highlight(), where, ansi_normal());
886
887 return 0;
888 }
889
890 static int stop_mounts(
891 sd_bus *bus,
892 const char *where) {
893
894 int r;
895
896 if (path_equal(where, "/")) {
897 log_error("Refusing to operate on root directory: %s", where);
898 return -EINVAL;
899 }
900
901 if (!path_is_normalized(where)) {
902 log_error("Path contains non-normalized components: %s", where);
903 return -EINVAL;
904 }
905
906 r = stop_mount(bus, where, ".mount");
907 if (r < 0)
908 return r;
909
910 r = stop_mount(bus, where, ".automount");
911 if (r < 0)
912 return r;
913
914 return 0;
915 }
916
917 static int umount_by_device(sd_bus *bus, const char *what) {
918 _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
919 _cleanup_(udev_unrefp) struct udev *udev = NULL;
920 _cleanup_strv_free_ char **list = NULL;
921 struct stat st;
922 const char *v;
923 char **l;
924 int r, r2 = 0;
925
926 assert(what);
927
928 if (stat(what, &st) < 0)
929 return log_error_errno(errno, "Can't stat %s: %m", what);
930
931 if (!S_ISBLK(st.st_mode)) {
932 log_error("Not a block device: %s", what);
933 return -ENOTBLK;
934 }
935
936 udev = udev_new();
937 if (!udev)
938 return log_oom();
939
940 d = udev_device_new_from_devnum(udev, 'b', st.st_rdev);
941 if (!d)
942 return log_oom();
943
944 v = udev_device_get_property_value(d, "ID_FS_USAGE");
945 if (!streq_ptr(v, "filesystem")) {
946 log_error("%s does not contain a known file system.", what);
947 return -EINVAL;
948 }
949
950 v = udev_device_get_property_value(d, "SYSTEMD_MOUNT_WHERE");
951 if (!isempty(v))
952 r2 = stop_mounts(bus, v);
953
954 r = find_mount_points(what, &list);
955 if (r < 0)
956 return r;
957
958 for (l = list; *l; l++) {
959 r = stop_mounts(bus, *l);
960 if (r < 0)
961 r2 = r;
962 }
963
964 return r2;
965 }
966
967 static int umount_loop(sd_bus *bus, const char *backing_file) {
968 _cleanup_free_ char *loop_dev = NULL;
969 int r;
970
971 assert(backing_file);
972
973 r = find_loop_device(backing_file, &loop_dev);
974 if (r < 0)
975 return log_error_errno(r, r == -ENXIO ? "File %s is not mounted." : "Can't get loop device for %s: %m", backing_file);
976
977 return umount_by_device(bus, loop_dev);
978 }
979
980 static int action_umount(
981 sd_bus *bus,
982 int argc,
983 char **argv) {
984
985 int i, r, r2 = 0;
986
987 if (arg_transport != BUS_TRANSPORT_LOCAL) {
988 for (i = optind; i < argc; i++) {
989 _cleanup_free_ char *p = NULL;
990
991 p = strdup(argv[i]);
992 if (!p)
993 return log_oom();
994
995 path_simplify(p, false);
996
997 r = stop_mounts(bus, p);
998 if (r < 0)
999 r2 = r;
1000 }
1001 return r2;
1002 }
1003
1004 for (i = optind; i < argc; i++) {
1005 _cleanup_free_ char *u = NULL, *p = NULL;
1006 struct stat st;
1007
1008 u = fstab_node_to_udev_node(argv[i]);
1009 if (!u)
1010 return log_oom();
1011
1012 r = chase_symlinks(u, NULL, 0, &p);
1013 if (r < 0) {
1014 r2 = log_error_errno(r, "Failed to make path %s absolute: %m", argv[i]);
1015 continue;
1016 }
1017
1018 if (stat(p, &st) < 0)
1019 return log_error_errno(errno, "Can't stat %s (from %s): %m", p, argv[i]);
1020
1021 if (S_ISBLK(st.st_mode))
1022 r = umount_by_device(bus, p);
1023 else if (S_ISREG(st.st_mode))
1024 r = umount_loop(bus, p);
1025 else if (S_ISDIR(st.st_mode))
1026 r = stop_mounts(bus, p);
1027 else {
1028 log_error("Invalid file type: %s (from %s)", p, argv[i]);
1029 r = -EINVAL;
1030 }
1031
1032 if (r < 0)
1033 r2 = r;
1034 }
1035
1036 return r2;
1037 }
1038
1039 static int acquire_mount_type(struct udev_device *d) {
1040 const char *v;
1041
1042 assert(d);
1043
1044 if (arg_mount_type)
1045 return 0;
1046
1047 v = udev_device_get_property_value(d, "ID_FS_TYPE");
1048 if (isempty(v))
1049 return 0;
1050
1051 arg_mount_type = strdup(v);
1052 if (!arg_mount_type)
1053 return log_oom();
1054
1055 log_debug("Discovered type=%s", arg_mount_type);
1056 return 1;
1057 }
1058
1059 static int acquire_mount_options(struct udev_device *d) {
1060 const char *v;
1061
1062 if (arg_mount_options)
1063 return 0;
1064
1065 v = udev_device_get_property_value(d, "SYSTEMD_MOUNT_OPTIONS");
1066 if (isempty(v))
1067 return 0;
1068
1069 arg_mount_options = strdup(v);
1070 if (!arg_mount_options)
1071 return log_oom();
1072
1073 log_debug("Discovered options=%s", arg_mount_options);
1074 return 1;
1075 }
1076
1077 static const char *get_model(struct udev_device *d) {
1078 const char *model;
1079
1080 assert(d);
1081
1082 model = udev_device_get_property_value(d, "ID_MODEL_FROM_DATABASE");
1083 if (model)
1084 return model;
1085
1086 return udev_device_get_property_value(d, "ID_MODEL");
1087 }
1088
1089 static const char* get_label(struct udev_device *d) {
1090 const char *label;
1091
1092 assert(d);
1093
1094 label = udev_device_get_property_value(d, "ID_FS_LABEL");
1095 if (label)
1096 return label;
1097
1098 return udev_device_get_property_value(d, "ID_PART_ENTRY_NAME");
1099 }
1100
1101 static int acquire_mount_where(struct udev_device *d) {
1102 const char *v;
1103
1104 if (arg_mount_where)
1105 return 0;
1106
1107 v = udev_device_get_property_value(d, "SYSTEMD_MOUNT_WHERE");
1108 if (isempty(v)) {
1109 _cleanup_free_ char *escaped = NULL;
1110 const char *name;
1111
1112 name = get_label(d);
1113 if (!name)
1114 name = get_model(d);
1115 if (!name) {
1116 const char *dn;
1117
1118 dn = udev_device_get_devnode(d);
1119 if (!dn)
1120 return 0;
1121
1122 name = basename(dn);
1123 }
1124
1125 escaped = xescape(name, "\\");
1126 if (!escaped)
1127 return log_oom();
1128 if (!filename_is_valid(escaped))
1129 return 0;
1130
1131 arg_mount_where = strjoin("/run/media/system/", escaped);
1132 } else
1133 arg_mount_where = strdup(v);
1134
1135 if (!arg_mount_where)
1136 return log_oom();
1137
1138 log_debug("Discovered where=%s", arg_mount_where);
1139 return 1;
1140 }
1141
1142 static int acquire_mount_where_for_loop_dev(const char *loop_dev) {
1143 _cleanup_strv_free_ char **list = NULL;
1144 int r;
1145
1146 if (arg_mount_where)
1147 return 0;
1148
1149 r = find_mount_points(loop_dev, &list);
1150 if (r < 0)
1151 return r;
1152 else if (r == 0) {
1153 log_error("Can't find mount point of %s. It is expected that %s is already mounted on a place.", loop_dev, loop_dev);
1154 return -EINVAL;
1155 } else if (r >= 2) {
1156 log_error("%s is mounted on %d places. It is expected that %s is mounted on a place.", loop_dev, r, loop_dev);
1157 return -EINVAL;
1158 }
1159
1160 arg_mount_where = strdup(list[0]);
1161 if (!arg_mount_where)
1162 return log_oom();
1163
1164 log_debug("Discovered where=%s", arg_mount_where);
1165 return 1;
1166 }
1167
1168 static int acquire_description(struct udev_device *d) {
1169 const char *model, *label;
1170
1171 if (arg_description)
1172 return 0;
1173
1174 model = get_model(d);
1175
1176 label = get_label(d);
1177 if (!label)
1178 label = udev_device_get_property_value(d, "ID_PART_ENTRY_NUMBER");
1179
1180 if (model && label)
1181 arg_description = strjoin(model, " ", label);
1182 else if (label)
1183 arg_description = strdup(label);
1184 else if (model)
1185 arg_description = strdup(model);
1186 else
1187 return 0;
1188
1189 if (!arg_description)
1190 return log_oom();
1191
1192 log_debug("Discovered description=%s", arg_description);
1193 return 1;
1194 }
1195
1196 static int acquire_removable(struct udev_device *d) {
1197 const char *v;
1198
1199 /* Shortcut this if there's no reason to check it */
1200 if (arg_action != ACTION_DEFAULT && arg_timeout_idle_set && arg_bind_device >= 0)
1201 return 0;
1202
1203 for (;;) {
1204 v = udev_device_get_sysattr_value(d, "removable");
1205 if (v)
1206 break;
1207
1208 d = udev_device_get_parent(d);
1209 if (!d)
1210 return 0;
1211
1212 if (!streq_ptr(udev_device_get_subsystem(d), "block"))
1213 return 0;
1214 }
1215
1216 if (parse_boolean(v) <= 0)
1217 return 0;
1218
1219 log_debug("Discovered removable device.");
1220
1221 if (arg_action == ACTION_DEFAULT) {
1222 log_debug("Automatically turning on automount.");
1223 arg_action = ACTION_AUTOMOUNT;
1224 }
1225
1226 if (!arg_timeout_idle_set) {
1227 log_debug("Setting idle timeout to 1s.");
1228 arg_timeout_idle = USEC_PER_SEC;
1229 }
1230
1231 if (arg_bind_device < 0) {
1232 log_debug("Binding automount unit to device.");
1233 arg_bind_device = true;
1234 }
1235
1236 return 1;
1237 }
1238
1239 static int discover_loop_backing_file(void) {
1240 _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
1241 _cleanup_(udev_unrefp) struct udev *udev = NULL;
1242 _cleanup_free_ char *loop_dev = NULL;
1243 struct stat st;
1244 const char *v;
1245 int r;
1246
1247 r = find_loop_device(arg_mount_what, &loop_dev);
1248 if (r < 0 && r != -ENXIO)
1249 return log_error_errno(errno, "Can't get loop device for %s: %m", arg_mount_what);
1250
1251 if (r == -ENXIO) {
1252 _cleanup_free_ char *escaped = NULL;
1253
1254 if (arg_mount_where)
1255 return 0;
1256
1257 escaped = xescape(basename(arg_mount_what), "\\");
1258 if (!escaped)
1259 return log_oom();
1260 if (!filename_is_valid(escaped)) {
1261 log_error("Escaped name %s is not a valid filename.", escaped);
1262 return -EINVAL;
1263 }
1264
1265 arg_mount_where = strjoin("/run/media/system/", escaped);
1266 if (!arg_mount_where)
1267 return log_oom();
1268
1269 log_debug("Discovered where=%s", arg_mount_where);
1270 return 0;
1271 }
1272
1273 if (stat(loop_dev, &st) < 0)
1274 return log_error_errno(errno, "Can't stat %s: %m", loop_dev);
1275
1276 if (!S_ISBLK(st.st_mode)) {
1277 log_error("Invalid file type: %s", loop_dev);
1278 return -EINVAL;
1279 }
1280
1281 udev = udev_new();
1282 if (!udev)
1283 return log_oom();
1284
1285 d = udev_device_new_from_devnum(udev, 'b', st.st_rdev);
1286 if (!d)
1287 return log_oom();
1288
1289 v = udev_device_get_property_value(d, "ID_FS_USAGE");
1290 if (!streq_ptr(v, "filesystem")) {
1291 log_error("%s does not contain a known file system.", arg_mount_what);
1292 return -EINVAL;
1293 }
1294
1295 r = acquire_mount_type(d);
1296 if (r < 0)
1297 return r;
1298
1299 r = acquire_mount_options(d);
1300 if (r < 0)
1301 return r;
1302
1303 r = acquire_mount_where_for_loop_dev(loop_dev);
1304 if (r < 0)
1305 return r;
1306
1307 r = acquire_description(d);
1308 if (r < 0)
1309 return r;
1310
1311 return 0;
1312 }
1313
1314 static int discover_device(void) {
1315 _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
1316 _cleanup_(udev_unrefp) struct udev *udev = NULL;
1317 struct stat st;
1318 const char *v;
1319 int r;
1320
1321 if (stat(arg_mount_what, &st) < 0)
1322 return log_error_errno(errno, "Can't stat %s: %m", arg_mount_what);
1323
1324 if (S_ISREG(st.st_mode))
1325 return discover_loop_backing_file();
1326
1327 if (!S_ISBLK(st.st_mode)) {
1328 log_error("Invalid file type: %s", arg_mount_what);
1329 return -EINVAL;
1330 }
1331
1332 udev = udev_new();
1333 if (!udev)
1334 return log_oom();
1335
1336 d = udev_device_new_from_devnum(udev, 'b', st.st_rdev);
1337 if (!d)
1338 return log_oom();
1339
1340 v = udev_device_get_property_value(d, "ID_FS_USAGE");
1341 if (!streq_ptr(v, "filesystem")) {
1342 log_error("%s does not contain a known file system.", arg_mount_what);
1343 return -EINVAL;
1344 }
1345
1346 r = acquire_mount_type(d);
1347 if (r < 0)
1348 return r;
1349
1350 r = acquire_mount_options(d);
1351 if (r < 0)
1352 return r;
1353
1354 r = acquire_mount_where(d);
1355 if (r < 0)
1356 return r;
1357
1358 r = acquire_description(d);
1359 if (r < 0)
1360 return r;
1361
1362 r = acquire_removable(d);
1363 if (r < 0)
1364 return r;
1365
1366 return 0;
1367 }
1368
1369 enum {
1370 COLUMN_NODE,
1371 COLUMN_PATH,
1372 COLUMN_MODEL,
1373 COLUMN_WWN,
1374 COLUMN_FSTYPE,
1375 COLUMN_LABEL,
1376 COLUMN_UUID,
1377 _COLUMN_MAX,
1378 };
1379
1380 struct item {
1381 char* columns[_COLUMN_MAX];
1382 };
1383
1384 static int compare_item(const void *a, const void *b) {
1385 const struct item *x = a, *y = b;
1386
1387 if (x->columns[COLUMN_NODE] == y->columns[COLUMN_NODE])
1388 return 0;
1389 if (!x->columns[COLUMN_NODE])
1390 return 1;
1391 if (!y->columns[COLUMN_NODE])
1392 return -1;
1393
1394 return path_compare(x->columns[COLUMN_NODE], y->columns[COLUMN_NODE]);
1395 }
1396
1397 static int list_devices(void) {
1398
1399 static const char * const titles[_COLUMN_MAX] = {
1400 [COLUMN_NODE] = "NODE",
1401 [COLUMN_PATH] = "PATH",
1402 [COLUMN_MODEL] = "MODEL",
1403 [COLUMN_WWN] = "WWN",
1404 [COLUMN_FSTYPE] = "TYPE",
1405 [COLUMN_LABEL] = "LABEL",
1406 [COLUMN_UUID] = "UUID"
1407 };
1408
1409 _cleanup_(udev_enumerate_unrefp) struct udev_enumerate *e = NULL;
1410 _cleanup_(udev_unrefp) struct udev *udev = NULL;
1411 struct udev_list_entry *item = NULL, *first = NULL;
1412 size_t n_allocated = 0, n = 0, i;
1413 size_t column_width[_COLUMN_MAX];
1414 struct item *items = NULL;
1415 unsigned c;
1416 int r;
1417
1418 for (c = 0; c < _COLUMN_MAX; c++)
1419 column_width[c] = strlen(titles[c]);
1420
1421 udev = udev_new();
1422 if (!udev)
1423 return log_oom();
1424
1425 e = udev_enumerate_new(udev);
1426 if (!e)
1427 return log_oom();
1428
1429 r = udev_enumerate_add_match_subsystem(e, "block");
1430 if (r < 0)
1431 return log_error_errno(r, "Failed to add block match: %m");
1432
1433 r = udev_enumerate_add_match_property(e, "ID_FS_USAGE", "filesystem");
1434 if (r < 0)
1435 return log_error_errno(r, "Failed to add property match: %m");
1436
1437 r = udev_enumerate_scan_devices(e);
1438 if (r < 0)
1439 return log_error_errno(r, "Failed to scan devices: %m");
1440
1441 first = udev_enumerate_get_list_entry(e);
1442 udev_list_entry_foreach(item, first) {
1443 _cleanup_(udev_device_unrefp) struct udev_device *d;
1444 struct item *j;
1445
1446 d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
1447 if (!d) {
1448 r = log_oom();
1449 goto finish;
1450 }
1451
1452 if (!GREEDY_REALLOC0(items, n_allocated, n+1)) {
1453 r = log_oom();
1454 goto finish;
1455 }
1456
1457 j = items + n++;
1458
1459 for (c = 0; c < _COLUMN_MAX; c++) {
1460 const char *x = NULL;
1461 size_t k;
1462
1463 switch (c) {
1464
1465 case COLUMN_NODE:
1466 x = udev_device_get_devnode(d);
1467 break;
1468
1469 case COLUMN_PATH:
1470 x = udev_device_get_property_value(d, "ID_PATH");
1471 break;
1472
1473 case COLUMN_MODEL:
1474 x = get_model(d);
1475 break;
1476
1477 case COLUMN_WWN:
1478 x = udev_device_get_property_value(d, "ID_WWN");
1479 break;
1480
1481 case COLUMN_FSTYPE:
1482 x = udev_device_get_property_value(d, "ID_FS_TYPE");
1483 break;
1484
1485 case COLUMN_LABEL:
1486 x = get_label(d);
1487 break;
1488
1489 case COLUMN_UUID:
1490 x = udev_device_get_property_value(d, "ID_FS_UUID");
1491 break;
1492 }
1493
1494 if (isempty(x))
1495 continue;
1496
1497 j->columns[c] = strdup(x);
1498 if (!j->columns[c]) {
1499 r = log_oom();
1500 goto finish;
1501 }
1502
1503 k = strlen(x);
1504 if (k > column_width[c])
1505 column_width[c] = k;
1506 }
1507 }
1508
1509 if (n == 0) {
1510 log_info("No devices found.");
1511 goto finish;
1512 }
1513
1514 qsort_safe(items, n, sizeof(struct item), compare_item);
1515
1516 (void) pager_open(arg_no_pager, false);
1517
1518 fputs(ansi_underline(), stdout);
1519 for (c = 0; c < _COLUMN_MAX; c++) {
1520 if (c > 0)
1521 fputc(' ', stdout);
1522
1523 printf("%-*s", (int) column_width[c], titles[c]);
1524 }
1525 fputs(ansi_normal(), stdout);
1526 fputc('\n', stdout);
1527
1528 for (i = 0; i < n; i++) {
1529 for (c = 0; c < _COLUMN_MAX; c++) {
1530 if (c > 0)
1531 fputc(' ', stdout);
1532
1533 printf("%-*s", (int) column_width[c], strna(items[i].columns[c]));
1534 }
1535 fputc('\n', stdout);
1536 }
1537
1538 r = 0;
1539
1540 finish:
1541 for (i = 0; i < n; i++)
1542 for (c = 0; c < _COLUMN_MAX; c++)
1543 free(items[i].columns[c]);
1544
1545 free(items);
1546 return r;
1547 }
1548
1549 int main(int argc, char* argv[]) {
1550 sd_bus *bus = NULL;
1551 int r;
1552
1553 log_parse_environment();
1554 log_open();
1555
1556 r = parse_argv(argc, argv);
1557 if (r <= 0)
1558 goto finish;
1559
1560 if (arg_action == ACTION_LIST) {
1561 r = list_devices();
1562 goto finish;
1563 }
1564
1565 r = bus_connect_transport_systemd(arg_transport, arg_host, arg_user, &bus);
1566 if (r < 0) {
1567 log_error_errno(r, "Failed to create bus connection: %m");
1568 goto finish;
1569 }
1570
1571 if (arg_action == ACTION_UMOUNT) {
1572 r = action_umount(bus, argc, argv);
1573 goto finish;
1574 }
1575
1576 if (!path_is_normalized(arg_mount_what)) {
1577 log_error("Path contains non-normalized components: %s", arg_mount_what);
1578 r = -EINVAL;
1579 goto finish;
1580 }
1581
1582 if (arg_discover) {
1583 r = discover_device();
1584 if (r < 0)
1585 goto finish;
1586 }
1587
1588 if (!arg_mount_where) {
1589 log_error("Can't figure out where to mount %s.", arg_mount_what);
1590 r = -EINVAL;
1591 goto finish;
1592 }
1593
1594 if (path_equal(arg_mount_where, "/")) {
1595 log_error("Refusing to operate on root directory.");
1596 r = -EINVAL;
1597 goto finish;
1598 }
1599
1600 if (!path_is_normalized(arg_mount_where)) {
1601 log_error("Path contains non-normalized components: %s", arg_mount_where);
1602 r = -EINVAL;
1603 goto finish;
1604 }
1605
1606 if (streq_ptr(arg_mount_type, "auto"))
1607 arg_mount_type = mfree(arg_mount_type);
1608 if (streq_ptr(arg_mount_options, "defaults"))
1609 arg_mount_options = mfree(arg_mount_options);
1610
1611 if (!is_device_path(arg_mount_what))
1612 arg_fsck = false;
1613
1614 if (arg_fsck && arg_mount_type && arg_transport == BUS_TRANSPORT_LOCAL) {
1615 r = fsck_exists(arg_mount_type);
1616 if (r < 0)
1617 log_warning_errno(r, "Couldn't determine whether fsck for %s exists, proceeding anyway.", arg_mount_type);
1618 else if (r == 0) {
1619 log_debug("Disabling file system check as fsck for %s doesn't exist.", arg_mount_type);
1620 arg_fsck = false; /* fsck doesn't exist, let's not attempt it */
1621 }
1622 }
1623
1624 /* The kernel (properly) refuses mounting file systems with unknown uid=,gid= options,
1625 * but not for all filesystem types. Let's try to catch the cases where the option
1626 * would be used if the file system does not support it. It is also possible to
1627 * autodetect the file system, but that's only possible with disk-based file systems
1628 * which incidentally seem to be implemented more carefully and reject unknown options,
1629 * so it's probably OK that we do the check only when the type is specified.
1630 */
1631 if (arg_mount_type &&
1632 !streq(arg_mount_type, "auto") &&
1633 arg_uid != UID_INVALID &&
1634 !fstype_can_uid_gid(arg_mount_type)) {
1635 log_error("File system type %s is not known to support uid=/gid=, refusing.",
1636 arg_mount_type);
1637 r = -EOPNOTSUPP;
1638 goto finish;
1639 }
1640
1641 switch (arg_action) {
1642
1643 case ACTION_MOUNT:
1644 case ACTION_DEFAULT:
1645 r = start_transient_mount(bus, argv + optind);
1646 break;
1647
1648 case ACTION_AUTOMOUNT:
1649 r = start_transient_automount(bus, argv + optind);
1650 break;
1651
1652 default:
1653 assert_not_reached("Unexpected action.");
1654 }
1655
1656 finish:
1657 /* make sure we terminate the bus connection first, and then close the
1658 * pager, see issue #3543 for the details. */
1659 bus = sd_bus_flush_close_unref(bus);
1660 pager_close();
1661
1662 free(arg_mount_what);
1663 free(arg_mount_where);
1664 free(arg_mount_type);
1665 free(arg_mount_options);
1666 free(arg_description);
1667 strv_free(arg_property);
1668 strv_free(arg_automount_property);
1669
1670 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1671 }
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