summaryrefslogtreecommitdiff
path: root/src/mount/mount-tool.c
blob: 25e18d279cbe80846cb859b9eed1ef0b0dc1e733 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <getopt.h>

#include "sd-bus.h"
#include "sd-device.h"

#include "bus-error.h"
#include "bus-locator.h"
#include "bus-unit-util.h"
#include "bus-wait-for-jobs.h"
#include "chase-symlinks.h"
#include "device-util.h"
#include "dirent-util.h"
#include "escape.h"
#include "fd-util.h"
#include "fileio.h"
#include "format-table.h"
#include "format-util.h"
#include "fs-util.h"
#include "fstab-util.h"
#include "libmount-util.h"
#include "main-func.h"
#include "mount-util.h"
#include "mountpoint-util.h"
#include "pager.h"
#include "parse-argument.h"
#include "parse-util.h"
#include "path-util.h"
#include "pretty-print.h"
#include "process-util.h"
#include "sort-util.h"
#include "spawn-polkit-agent.h"
#include "stat-util.h"
#include "strv.h"
#include "terminal-util.h"
#include "unit-def.h"
#include "unit-name.h"
#include "user-util.h"

enum {
        ACTION_DEFAULT,
        ACTION_MOUNT,
        ACTION_AUTOMOUNT,
        ACTION_UMOUNT,
        ACTION_LIST,
} arg_action = ACTION_DEFAULT;

static bool arg_no_block = false;
static PagerFlags arg_pager_flags = 0;
static bool arg_legend = true;
static bool arg_full = false;
static bool arg_ask_password = true;
static bool arg_quiet = false;
static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
static bool arg_user = false;
static const char *arg_host = NULL;
static bool arg_discover = false;
static char *arg_mount_what = NULL;
static char *arg_mount_where = NULL;
static char *arg_mount_type = NULL;
static char *arg_mount_options = NULL;
static char *arg_description = NULL;
static char **arg_property = NULL;
static usec_t arg_timeout_idle = USEC_INFINITY;
static bool arg_timeout_idle_set = false;
static char **arg_automount_property = NULL;
static int arg_bind_device = -1;
static uid_t arg_uid = UID_INVALID;
static gid_t arg_gid = GID_INVALID;
static bool arg_fsck = true;
static bool arg_aggressive_gc = false;

STATIC_DESTRUCTOR_REGISTER(arg_mount_what, freep);
STATIC_DESTRUCTOR_REGISTER(arg_mount_where, freep);
STATIC_DESTRUCTOR_REGISTER(arg_mount_type, freep);
STATIC_DESTRUCTOR_REGISTER(arg_mount_options, freep);
STATIC_DESTRUCTOR_REGISTER(arg_description, freep);
STATIC_DESTRUCTOR_REGISTER(arg_property, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_automount_property, strv_freep);

static int help(void) {
        _cleanup_free_ char *link = NULL;
        int r;

        r = terminal_urlify_man("systemd-mount", "1", &link);
        if (r < 0)
                return log_oom();

        printf("systemd-mount [OPTIONS...] WHAT [WHERE]\n"
               "systemd-mount [OPTIONS...] --list\n"
               "%s [OPTIONS...] %sWHAT|WHERE...\n\n"
               "Establish a mount or auto-mount point transiently.\n\n"
               "  -h --help                       Show this help\n"
               "     --version                    Show package version\n"
               "     --no-block                   Do not wait until operation finished\n"
               "     --no-pager                   Do not pipe output into a pager\n"
               "     --no-legend                  Do not show the headers\n"
               "  -l --full                       Do not ellipsize output\n"
               "     --no-ask-password            Do not prompt for password\n"
               "  -q --quiet                      Suppress information messages during runtime\n"
               "     --user                       Run as user unit\n"
               "  -H --host=[USER@]HOST           Operate on remote host\n"
               "  -M --machine=CONTAINER          Operate on local container\n"
               "     --discover                   Discover mount device metadata\n"
               "  -t --type=TYPE                  File system type\n"
               "  -o --options=OPTIONS            Mount options\n"
               "     --owner=USER                 Add uid= and gid= options for USER\n"
               "     --fsck=no                    Don't run file system check before mount\n"
               "     --description=TEXT           Description for unit\n"
               "  -p --property=NAME=VALUE        Set mount unit property\n"
               "  -A --automount=BOOL             Create an auto-mount point\n"
               "     --timeout-idle-sec=SEC       Specify automount idle timeout\n"
               "     --automount-property=NAME=VALUE\n"
               "                                  Set automount unit property\n"
               "     --bind-device                Bind automount unit to device\n"
               "     --list                       List mountable block devices\n"
               "  -u --umount                     Unmount mount points\n"
               "  -G --collect                    Unload unit after it stopped, even when failed\n"
               "\nSee the %s for details.\n",
               program_invocation_short_name,
               streq(program_invocation_short_name, "systemd-umount") ? "" : "--umount ",
               link);

        return 0;
}

static int parse_argv(int argc, char *argv[]) {

        enum {
                ARG_VERSION = 0x100,
                ARG_NO_BLOCK,
                ARG_NO_PAGER,
                ARG_NO_LEGEND,
                ARG_NO_ASK_PASSWORD,
                ARG_USER,
                ARG_SYSTEM,
                ARG_DISCOVER,
                ARG_MOUNT_TYPE,
                ARG_MOUNT_OPTIONS,
                ARG_OWNER,
                ARG_FSCK,
                ARG_DESCRIPTION,
                ARG_TIMEOUT_IDLE,
                ARG_AUTOMOUNT,
                ARG_AUTOMOUNT_PROPERTY,
                ARG_BIND_DEVICE,
                ARG_LIST,
        };

        static const struct option options[] = {
                { "help",               no_argument,       NULL, 'h'                    },
                { "version",            no_argument,       NULL, ARG_VERSION            },
                { "no-block",           no_argument,       NULL, ARG_NO_BLOCK           },
                { "no-pager",           no_argument,       NULL, ARG_NO_PAGER           },
                { "no-legend",          no_argument,       NULL, ARG_NO_LEGEND          },
                { "full",               no_argument,       NULL, 'l'                    },
                { "no-ask-password",    no_argument,       NULL, ARG_NO_ASK_PASSWORD    },
                { "quiet",              no_argument,       NULL, 'q'                    },
                { "user",               no_argument,       NULL, ARG_USER               },
                { "system",             no_argument,       NULL, ARG_SYSTEM             },
                { "host",               required_argument, NULL, 'H'                    },
                { "machine",            required_argument, NULL, 'M'                    },
                { "discover",           no_argument,       NULL, ARG_DISCOVER           },
                { "type",               required_argument, NULL, 't'                    },
                { "options",            required_argument, NULL, 'o'                    },
                { "owner",              required_argument, NULL, ARG_OWNER              },
                { "fsck",               required_argument, NULL, ARG_FSCK               },
                { "description",        required_argument, NULL, ARG_DESCRIPTION        },
                { "property",           required_argument, NULL, 'p'                    },
                { "automount",          required_argument, NULL, ARG_AUTOMOUNT          },
                { "timeout-idle-sec",   required_argument, NULL, ARG_TIMEOUT_IDLE       },
                { "automount-property", required_argument, NULL, ARG_AUTOMOUNT_PROPERTY },
                { "bind-device",        no_argument,       NULL, ARG_BIND_DEVICE        },
                { "list",               no_argument,       NULL, ARG_LIST               },
                { "umount",             no_argument,       NULL, 'u'                    },
                { "unmount",            no_argument,       NULL, 'u'                    },
                { "collect",            no_argument,       NULL, 'G'                    },
                {},
        };

        int r, c;

        assert(argc >= 0);
        assert(argv);

        if (invoked_as(argv, "systemd-umount"))
                arg_action = ACTION_UMOUNT;

        while ((c = getopt_long(argc, argv, "hqH:M:t:o:p:AuGl", options, NULL)) >= 0)

                switch (c) {

                case 'h':
                        return help();

                case ARG_VERSION:
                        return version();

                case ARG_NO_BLOCK:
                        arg_no_block = true;
                        break;

                case ARG_NO_PAGER:
                        arg_pager_flags |= PAGER_DISABLE;
                        break;

                case ARG_NO_LEGEND:
                        arg_legend = false;
                        break;

                case 'l':
                        arg_full = true;
                        break;

                case ARG_NO_ASK_PASSWORD:
                        arg_ask_password = false;
                        break;

                case 'q':
                        arg_quiet = true;
                        break;

                case ARG_USER:
                        arg_user = true;
                        break;

                case ARG_SYSTEM:
                        arg_user = false;
                        break;

                case 'H':
                        arg_transport = BUS_TRANSPORT_REMOTE;
                        arg_host = optarg;
                        break;

                case 'M':
                        arg_transport = BUS_TRANSPORT_MACHINE;
                        arg_host = optarg;
                        break;

                case ARG_DISCOVER:
                        arg_discover = true;
                        break;

                case 't':
                        r = free_and_strdup_warn(&arg_mount_type, optarg);
                        if (r < 0)
                                return r;
                        break;

                case 'o':
                        r = free_and_strdup_warn(&arg_mount_options, optarg);
                        if (r < 0)
                                return r;
                        break;

                case ARG_OWNER: {
                        const char *user = optarg;

                        r = get_user_creds(&user, &arg_uid, &arg_gid, NULL, NULL, 0);
                        if (r < 0)
                                return log_error_errno(r,
                                                       r == -EBADMSG ? "UID or GID of user %s are invalid."
                                                                     : "Cannot use \"%s\" as owner: %m",
                                                       optarg);
                        break;
                }

                case ARG_FSCK:
                        r = parse_boolean_argument("--fsck=", optarg, &arg_fsck);
                        if (r < 0)
                                return r;
                        break;

                case ARG_DESCRIPTION:
                        r = free_and_strdup_warn(&arg_description, optarg);
                        if (r < 0)
                                return r;
                        break;

                case 'p':
                        if (strv_extend(&arg_property, optarg) < 0)
                                return log_oom();

                        break;

                case 'A':
                        arg_action = ACTION_AUTOMOUNT;
                        break;

                case ARG_AUTOMOUNT:
                        r = parse_boolean_argument("--automount=", optarg, NULL);
                        if (r < 0)
                                return r;

                        arg_action = r ? ACTION_AUTOMOUNT : ACTION_MOUNT;
                        break;

                case ARG_TIMEOUT_IDLE:
                        r = parse_sec(optarg, &arg_timeout_idle);
                        if (r < 0)
                                return log_error_errno(r, "Failed to parse timeout: %s", optarg);

                        break;

                case ARG_AUTOMOUNT_PROPERTY:
                        if (strv_extend(&arg_automount_property, optarg) < 0)
                                return log_oom();

                        break;

                case ARG_BIND_DEVICE:
                        arg_bind_device = true;
                        break;

                case ARG_LIST:
                        arg_action = ACTION_LIST;
                        break;

                case 'u':
                        arg_action = ACTION_UMOUNT;
                        break;

                case 'G':
                        arg_aggressive_gc = true;
                        break;

                case '?':
                        return -EINVAL;

                default:
                        assert_not_reached();
                }

        if (arg_user)
                arg_ask_password = false;

        if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL)
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Execution in user context is not supported on non-local systems.");

        if (arg_action == ACTION_LIST) {
                if (optind < argc)
                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                               "Too many arguments.");

                if (arg_transport != BUS_TRANSPORT_LOCAL)
                        return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
                                               "Listing devices only supported locally.");
        } else if (arg_action == ACTION_UMOUNT) {
                if (optind >= argc)
                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                               "At least one argument required.");

                if (arg_transport != BUS_TRANSPORT_LOCAL) {
                        int i;

                        for (i = optind; i < argc; i++)
                                if (!path_is_absolute(argv[i]) )
                                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                               "Only absolute path is supported: %s", argv[i]);
                }
        } else {
                if (optind >= argc)
                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                               "At least one argument required.");

                if (argc > optind+2)
                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                               "At most two arguments required.");

                if (arg_mount_type && !fstype_is_blockdev_backed(arg_mount_type)) {
                        arg_mount_what = strdup(argv[optind]);
                        if (!arg_mount_what)
                                return log_oom();

                } else if (arg_transport == BUS_TRANSPORT_LOCAL) {
                        _cleanup_free_ char *u = NULL;

                        u = fstab_node_to_udev_node(argv[optind]);
                        if (!u)
                                return log_oom();

                        r = chase_symlinks(u, NULL, 0, &arg_mount_what, NULL);
                        if (r < 0)
                                return log_error_errno(r, "Failed to make path %s absolute: %m", u);
                } else {
                        arg_mount_what = strdup(argv[optind]);
                        if (!arg_mount_what)
                                return log_oom();

                        path_simplify(arg_mount_what);

                        if (!path_is_absolute(arg_mount_what))
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Only absolute path is supported: %s", arg_mount_what);
                }

                if (argc > optind+1) {
                        if (arg_transport == BUS_TRANSPORT_LOCAL) {
                                r = chase_symlinks(argv[optind+1], NULL, CHASE_NONEXISTENT, &arg_mount_where, NULL);
                                if (r < 0)
                                        return log_error_errno(r, "Failed to make path %s absolute: %m", argv[optind+1]);
                        } else {
                                arg_mount_where = strdup(argv[optind+1]);
                                if (!arg_mount_where)
                                        return log_oom();

                                path_simplify(arg_mount_where);

                                if (!path_is_absolute(arg_mount_where))
                                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                               "Only absolute path is supported: %s", arg_mount_where);
                        }
                } else
                        arg_discover = true;

                if (arg_discover && arg_transport != BUS_TRANSPORT_LOCAL)
                        return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
                                               "Automatic mount location discovery is only supported locally.");
        }

        return 1;
}

static int transient_unit_set_properties(sd_bus_message *m, UnitType t, char **properties) {
        int r;

        if (!isempty(arg_description)) {
                r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description);
                if (r < 0)
                        return r;
        }

        if (arg_bind_device && is_device_path(arg_mount_what)) {
                _cleanup_free_ char *device_unit = NULL;

                r = unit_name_from_path(arg_mount_what, ".device", &device_unit);
                if (r < 0)
                        return r;

                r = sd_bus_message_append(m, "(sv)(sv)",
                                          "After", "as", 1, device_unit,
                                          "BindsTo", "as", 1, device_unit);
                if (r < 0)
                        return r;
        }

        if (arg_aggressive_gc) {
                r = sd_bus_message_append(m, "(sv)", "CollectMode", "s", "inactive-or-failed");
                if (r < 0)
                        return r;
        }

        r = bus_append_unit_property_assignment_many(m, t, properties);
        if (r < 0)
                return r;

        return 0;
}

static int transient_mount_set_properties(sd_bus_message *m) {
        _cleanup_free_ char *options = NULL;
        int r;

        assert(m);

        r = transient_unit_set_properties(m, UNIT_MOUNT, arg_property);
        if (r < 0)
                return r;

        if (arg_mount_what) {
                r = sd_bus_message_append(m, "(sv)", "What", "s", arg_mount_what);
                if (r < 0)
                        return r;
        }

        if (arg_mount_type) {
                r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_mount_type);
                if (r < 0)
                        return r;
        }

        /* Prepend uid=…,gid=… if arg_uid is set */
        if (arg_uid != UID_INVALID) {
                r = asprintf(&options,
                             "uid=" UID_FMT ",gid=" GID_FMT "%s%s",
                             arg_uid, arg_gid,
                             arg_mount_options ? "," : "", strempty(arg_mount_options));
                if (r < 0)
                        return -ENOMEM;
        }

        if (options || arg_mount_options) {
                log_debug("Using mount options: %s", options ?: arg_mount_options);

                r = sd_bus_message_append(m, "(sv)", "Options", "s", options ?: arg_mount_options);
                if (r < 0)
                        return r;
        } else
                log_debug("Not using any mount options");

        if (arg_fsck) {
                _cleanup_free_ char *fsck = NULL;

                r = unit_name_from_path_instance("systemd-fsck", arg_mount_what, ".service", &fsck);
                if (r < 0)
                        return r;

                r = sd_bus_message_append(m,
                                          "(sv)(sv)",
                                          "Requires", "as", 1, fsck,
                                          "After", "as", 1, fsck);
                if (r < 0)
                        return r;
        }

        return 0;
}

static int transient_automount_set_properties(sd_bus_message *m) {
        int r;

        assert(m);

        r = transient_unit_set_properties(m, UNIT_AUTOMOUNT, arg_automount_property);
        if (r < 0)
                return r;

        if (arg_timeout_idle != USEC_INFINITY) {
                r = sd_bus_message_append(m, "(sv)", "TimeoutIdleUSec", "t", arg_timeout_idle);
                if (r < 0)
                        return r;
        }

        return 0;
}

static int start_transient_mount(
                sd_bus *bus,
                char **argv) {

        _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
        _cleanup_free_ char *mount_unit = NULL;
        int r;

        if (!arg_no_block) {
                r = bus_wait_for_jobs_new(bus, &w);
                if (r < 0)
                        return log_error_errno(r, "Could not watch jobs: %m");
        }

        r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit);
        if (r < 0)
                return log_error_errno(r, "Failed to make mount unit name: %m");

        r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit");
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
        if (r < 0)
                return bus_log_create_error(r);

        /* Name and mode */
        r = sd_bus_message_append(m, "ss", mount_unit, "fail");
        if (r < 0)
                return bus_log_create_error(r);

        /* Properties */
        r = sd_bus_message_open_container(m, 'a', "(sv)");
        if (r < 0)
                return bus_log_create_error(r);

        r = transient_mount_set_properties(m);
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_close_container(m);
        if (r < 0)
                return bus_log_create_error(r);

        /* Auxiliary units */
        r = sd_bus_message_append(m, "a(sa(sv))", 0);
        if (r < 0)
                return bus_log_create_error(r);

        polkit_agent_open_if_enabled(arg_transport, arg_ask_password);

        r = sd_bus_call(bus, m, 0, &error, &reply);
        if (r < 0)
                return log_error_errno(r, "Failed to start transient mount unit: %s", bus_error_message(&error, r));

        if (w) {
                const char *object;

                r = sd_bus_message_read(reply, "o", &object);
                if (r < 0)
                        return bus_log_parse_error(r);

                r = bus_wait_for_jobs_one(w, object, arg_quiet, NULL);
                if (r < 0)
                        return r;
        }

        if (!arg_quiet)
                log_info("Started unit %s%s%s for mount point: %s%s%s",
                         ansi_highlight(), mount_unit, ansi_normal(),
                         ansi_highlight(), arg_mount_where, ansi_normal());

        return 0;
}

static int start_transient_automount(
                sd_bus *bus,
                char **argv) {

        _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
        _cleanup_free_ char *automount_unit = NULL, *mount_unit = NULL;
        int r;

        if (!arg_no_block) {
                r = bus_wait_for_jobs_new(bus, &w);
                if (r < 0)
                        return log_error_errno(r, "Could not watch jobs: %m");
        }

        r = unit_name_from_path(arg_mount_where, ".automount", &automount_unit);
        if (r < 0)
                return log_error_errno(r, "Failed to make automount unit name: %m");

        r = unit_name_from_path(arg_mount_where, ".mount", &mount_unit);
        if (r < 0)
                return log_error_errno(r, "Failed to make mount unit name: %m");

        r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit");
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
        if (r < 0)
                return bus_log_create_error(r);

        /* Name and mode */
        r = sd_bus_message_append(m, "ss", automount_unit, "fail");
        if (r < 0)
                return bus_log_create_error(r);

        /* Properties */
        r = sd_bus_message_open_container(m, 'a', "(sv)");
        if (r < 0)
                return bus_log_create_error(r);

        r = transient_automount_set_properties(m);
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_close_container(m);
        if (r < 0)
                return bus_log_create_error(r);

        /* Auxiliary units */
        r = sd_bus_message_open_container(m, 'a', "(sa(sv))");
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_open_container(m, 'r', "sa(sv)");
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_append(m, "s", mount_unit);
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_open_container(m, 'a', "(sv)");
        if (r < 0)
                return bus_log_create_error(r);

        r = transient_mount_set_properties(m);
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_close_container(m);
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_close_container(m);
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_close_container(m);
        if (r < 0)
                return bus_log_create_error(r);

        polkit_agent_open_if_enabled(arg_transport, arg_ask_password);

        r = sd_bus_call(bus, m, 0, &error, &reply);
        if (r < 0)
                return log_error_errno(r, "Failed to start transient automount unit: %s", bus_error_message(&error, r));

        if (w) {
                const char *object;

                r = sd_bus_message_read(reply, "o", &object);
                if (r < 0)
                        return bus_log_parse_error(r);

                r = bus_wait_for_jobs_one(w, object, arg_quiet, NULL);
                if (r < 0)
                        return r;
        }

        if (!arg_quiet)
                log_info("Started unit %s%s%s for mount point: %s%s%s",
                         ansi_highlight(), automount_unit, ansi_normal(),
                         ansi_highlight(), arg_mount_where, ansi_normal());

        return 0;
}

static int find_mount_points(const char *what, char ***list) {
        _cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL;
        _cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL;
        _cleanup_strv_free_ char **l = NULL;
        size_t n = 0;
        int r;

        assert(what);
        assert(list);

        /* Returns all mount points obtained from /proc/self/mountinfo in *list,
         * and the number of mount points as return value. */

        r = libmount_parse(NULL, NULL, &table, &iter);
        if (r < 0)
                return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m");

        for (;;) {
                struct libmnt_fs *fs;
                const char *source, *target;

                r = mnt_table_next_fs(table, iter, &fs);
                if (r == 1)
                        break;
                if (r < 0)
                        return log_error_errno(r, "Failed to get next entry from /proc/self/mountinfo: %m");

                source = mnt_fs_get_source(fs);
                target = mnt_fs_get_target(fs);
                if (!source || !target)
                        continue;

                if (!path_equal(source, what))
                        continue;

                /* one extra slot is needed for the terminating NULL */
                if (!GREEDY_REALLOC0(l, n + 2))
                        return log_oom();

                l[n] = strdup(target);
                if (!l[n])
                        return log_oom();
                n++;
        }

        if (!GREEDY_REALLOC0(l, n + 1))
                return log_oom();

        *list = TAKE_PTR(l);
        return n;
}

static int find_loop_device(const char *backing_file, char **loop_dev) {
        _cleanup_closedir_ DIR *d = NULL;
        _cleanup_free_ char *l = NULL;

        assert(backing_file);
        assert(loop_dev);

        d = opendir("/sys/devices/virtual/block");
        if (!d)
                return -errno;

        FOREACH_DIRENT(de, d, return -errno) {
                _cleanup_free_ char *sys = NULL, *fname = NULL;
                int r;

                if (de->d_type != DT_DIR)
                        continue;

                if (!startswith(de->d_name, "loop"))
                        continue;

                sys = path_join("/sys/devices/virtual/block", de->d_name, "loop/backing_file");
                if (!sys)
                        return -ENOMEM;

                r = read_one_line_file(sys, &fname);
                if (r < 0) {
                        log_debug_errno(r, "Failed to read %s, ignoring: %m", sys);
                        continue;
                }

                if (files_same(fname, backing_file, 0) <= 0)
                        continue;

                l = path_join("/dev", de->d_name);
                if (!l)
                        return -ENOMEM;

                break;
        }

        if (!l)
                return -ENXIO;

        *loop_dev = TAKE_PTR(l);

        return 0;
}

static int stop_mount(
                sd_bus *bus,
                const char *where,
                const char *suffix) {

        _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
        _cleanup_free_ char *mount_unit = NULL;
        int r;

        if (!arg_no_block) {
                r = bus_wait_for_jobs_new(bus, &w);
                if (r < 0)
                        return log_error_errno(r, "Could not watch jobs: %m");
        }

        r = unit_name_from_path(where, suffix, &mount_unit);
        if (r < 0)
                return log_error_errno(r, "Failed to make %s unit name from path %s: %m", suffix + 1, where);

        r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StopUnit");
        if (r < 0)
                return bus_log_create_error(r);

        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
        if (r < 0)
                return bus_log_create_error(r);

        /* Name and mode */
        r = sd_bus_message_append(m, "ss", mount_unit, "fail");
        if (r < 0)
                return bus_log_create_error(r);

        polkit_agent_open_if_enabled(arg_transport, arg_ask_password);

        r = sd_bus_call(bus, m, 0, &error, &reply);
        if (r < 0) {
                if (streq(suffix, ".automount") &&
                    sd_bus_error_has_name(&error, "org.freedesktop.systemd1.NoSuchUnit"))
                        return 0;
                return log_error_errno(r, "Failed to stop %s unit: %s", suffix + 1, bus_error_message(&error, r));
        }

        if (w) {
                const char *object;

                r = sd_bus_message_read(reply, "o", &object);
                if (r < 0)
                        return bus_log_parse_error(r);

                r = bus_wait_for_jobs_one(w, object, arg_quiet, NULL);
                if (r < 0)
                        return r;
        }

        if (!arg_quiet)
                log_info("Stopped unit %s%s%s for mount point: %s%s%s",
                         ansi_highlight(), mount_unit, ansi_normal(),
                         ansi_highlight(), where, ansi_normal());

        return 0;
}

static int stop_mounts(
                sd_bus *bus,
                const char *where) {

        int r;

        if (path_equal(where, "/"))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Refusing to operate on root directory: %s", where);

        if (!path_is_normalized(where))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Path contains non-normalized components: %s", where);

        r = stop_mount(bus, where, ".mount");
        if (r < 0)
                return r;

        r = stop_mount(bus, where, ".automount");
        if (r < 0)
                return r;

        return 0;
}

static int umount_by_device(sd_bus *bus, const char *what) {
        _cleanup_(sd_device_unrefp) sd_device *d = NULL;
        _cleanup_strv_free_ char **list = NULL;
        struct stat st;
        const char *v;
        char **l;
        int r, r2 = 0;

        assert(what);

        if (stat(what, &st) < 0)
                return log_error_errno(errno, "Can't stat %s: %m", what);

        if (!S_ISBLK(st.st_mode))
                return log_error_errno(SYNTHETIC_ERRNO(ENOTBLK),
                                       "Not a block device: %s", what);

        r = sd_device_new_from_stat_rdev(&d, &st);
        if (r < 0)
                return log_error_errno(r, "Failed to get device from device number: %m");

        r = sd_device_get_property_value(d, "ID_FS_USAGE", &v);
        if (r < 0)
                return log_device_error_errno(d, r, "Failed to get device property: %m");

        if (!streq(v, "filesystem"))
                return log_device_error_errno(d, SYNTHETIC_ERRNO(EINVAL),
                                              "%s does not contain a known file system.", what);

        if (sd_device_get_property_value(d, "SYSTEMD_MOUNT_WHERE", &v) >= 0)
                r2 = stop_mounts(bus, v);

        r = find_mount_points(what, &list);
        if (r < 0)
                return r;

        for (l = list; *l; l++) {
                r = stop_mounts(bus, *l);
                if (r < 0)
                        r2 = r;
        }

        return r2;
}

static int umount_loop(sd_bus *bus, const char *backing_file) {
        _cleanup_free_ char *loop_dev = NULL;
        int r;

        assert(backing_file);

        r = find_loop_device(backing_file, &loop_dev);
        if (r < 0)
                return log_error_errno(r, r == -ENXIO ? "File %s is not mounted." : "Can't get loop device for %s: %m", backing_file);

        return umount_by_device(bus, loop_dev);
}

static int action_umount(
                sd_bus *bus,
                int argc,
                char **argv) {

        int i, r, r2 = 0;

        if (arg_transport != BUS_TRANSPORT_LOCAL) {
                for (i = optind; i < argc; i++) {
                        _cleanup_free_ char *p = NULL;

                        p = strdup(argv[i]);
                        if (!p)
                                return log_oom();

                        path_simplify(p);

                        r = stop_mounts(bus, p);
                        if (r < 0)
                                r2 = r;
                }
                return r2;
        }

        for (i = optind; i < argc; i++) {
                _cleanup_free_ char *u = NULL, *p = NULL;
                struct stat st;

                u = fstab_node_to_udev_node(argv[i]);
                if (!u)
                        return log_oom();

                r = chase_symlinks(u, NULL, 0, &p, NULL);
                if (r < 0) {
                        r2 = log_error_errno(r, "Failed to make path %s absolute: %m", argv[i]);
                        continue;
                }

                if (stat(p, &st) < 0)
                        return log_error_errno(errno, "Can't stat %s (from %s): %m", p, argv[i]);

                if (S_ISBLK(st.st_mode))
                        r = umount_by_device(bus, p);
                else if (S_ISREG(st.st_mode))
                        r = umount_loop(bus, p);
                else if (S_ISDIR(st.st_mode))
                        r = stop_mounts(bus, p);
                else {
                        log_error("Invalid file type: %s (from %s)", p, argv[i]);
                        r = -EINVAL;
                }

                if (r < 0)
                        r2 = r;
        }

        return r2;
}

static int acquire_mount_type(sd_device *d) {
        const char *v;

        assert(d);

        if (arg_mount_type)
                return 0;

        if (sd_device_get_property_value(d, "ID_FS_TYPE", &v) < 0)
                return 0;

        arg_mount_type = strdup(v);
        if (!arg_mount_type)
                return log_oom();

        log_debug("Discovered type=%s", arg_mount_type);
        return 1;
}

static int acquire_mount_options(sd_device *d) {
        const char *v;

        assert(d);

        if (arg_mount_options)
                return 0;

        if (sd_device_get_property_value(d, "SYSTEMD_MOUNT_OPTIONS", &v) < 0)
                return 0;

        arg_mount_options = strdup(v);
        if (!arg_mount_options)
                return log_oom();

        log_debug("Discovered options=%s", arg_mount_options);
        return 1;
}

static const char *get_model(sd_device *d) {
        const char *model;

        assert(d);

        if (sd_device_get_property_value(d, "ID_MODEL_FROM_DATABASE", &model) >= 0)
                return model;

        if (sd_device_get_property_value(d, "ID_MODEL", &model) >= 0)
                return model;

        return NULL;
}

static const char* get_label(sd_device *d) {
        const char *label;

        assert(d);

        if (sd_device_get_property_value(d, "ID_FS_LABEL", &label) >= 0)
                return label;

        if (sd_device_get_property_value(d, "ID_PART_ENTRY_NAME", &label) >= 0)
                return label;

        return NULL;
}

static int acquire_mount_where(sd_device *d) {
        const char *v;

        if (arg_mount_where)
                return 0;

        if (sd_device_get_property_value(d, "SYSTEMD_MOUNT_WHERE", &v) < 0) {
                _cleanup_free_ char *escaped = NULL;
                const char *name;

                name = get_label(d);
                if (!name)
                        name = get_model(d);
                if (!name) {
                        const char *dn;

                        if (sd_device_get_devname(d, &dn) < 0)
                                return 0;

                        name = basename(dn);
                }

                escaped = xescape(name, "\\");
                if (!escaped)
                        return log_oom();
                if (!filename_is_valid(escaped))
                        return 0;

                arg_mount_where = path_join("/run/media/system", escaped);
        } else
                arg_mount_where = strdup(v);

        if (!arg_mount_where)
                return log_oom();

        log_debug("Discovered where=%s", arg_mount_where);
        return 1;
}

static int acquire_mount_where_for_loop_dev(const char *loop_dev) {
        _cleanup_strv_free_ char **list = NULL;
        int r;

        if (arg_mount_where)
                return 0;

        r = find_mount_points(loop_dev, &list);
        if (r < 0)
                return r;
        else if (r == 0)
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Can't find mount point of %s. It is expected that %s is already mounted on a place.",
                                       loop_dev, loop_dev);
        else if (r >= 2)
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "%s is mounted on %d places. It is expected that %s is mounted on a place.",
                                       loop_dev, r, loop_dev);

        arg_mount_where = strdup(list[0]);
        if (!arg_mount_where)
                return log_oom();

        log_debug("Discovered where=%s", arg_mount_where);
        return 1;
}

static int acquire_description(sd_device *d) {
        const char *model, *label;

        if (arg_description)
                return 0;

        model = get_model(d);

        label = get_label(d);
        if (!label)
                (void) sd_device_get_property_value(d, "ID_PART_ENTRY_NUMBER", &label);

        if (model && label)
                arg_description = strjoin(model, " ", label);
        else if (label)
                arg_description = strdup(label);
        else if (model)
                arg_description = strdup(model);
        else
                return 0;

        if (!arg_description)
                return log_oom();

        log_debug("Discovered description=%s", arg_description);
        return 1;
}

static int acquire_removable(sd_device *d) {
        const char *v;

        /* Shortcut this if there's no reason to check it */
        if (arg_action != ACTION_DEFAULT && arg_timeout_idle_set && arg_bind_device >= 0)
                return 0;

        for (;;) {
                if (sd_device_get_sysattr_value(d, "removable", &v) >= 0)
                        break;

                if (sd_device_get_parent(d, &d) < 0)
                        return 0;

                if (sd_device_get_subsystem(d, &v) < 0 || !streq(v, "block"))
                        return 0;
        }

        if (parse_boolean(v) <= 0)
                return 0;

        log_debug("Discovered removable device.");

        if (arg_action == ACTION_DEFAULT) {
                log_debug("Automatically turning on automount.");
                arg_action = ACTION_AUTOMOUNT;
        }

        if (!arg_timeout_idle_set) {
                log_debug("Setting idle timeout to 1s.");
                arg_timeout_idle = USEC_PER_SEC;
        }

        if (arg_bind_device < 0) {
                log_debug("Binding automount unit to device.");
                arg_bind_device = true;
        }

        return 1;
}

static int discover_loop_backing_file(void) {
        _cleanup_(sd_device_unrefp) sd_device *d = NULL;
        _cleanup_free_ char *loop_dev = NULL;
        struct stat st;
        const char *v;
        int r;

        r = find_loop_device(arg_mount_what, &loop_dev);
        if (r < 0 && r != -ENXIO)
                return log_error_errno(errno, "Can't get loop device for %s: %m", arg_mount_what);

        if (r == -ENXIO) {
                _cleanup_free_ char *escaped = NULL;

                if (arg_mount_where)
                        return 0;

                escaped = xescape(basename(arg_mount_what), "\\");
                if (!escaped)
                        return log_oom();
                if (!filename_is_valid(escaped))
                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                               "Escaped name %s is not a valid filename.",
                                               escaped);

                arg_mount_where = path_join("/run/media/system", escaped);
                if (!arg_mount_where)
                        return log_oom();

                log_debug("Discovered where=%s", arg_mount_where);
                return 0;
        }

        if (stat(loop_dev, &st) < 0)
                return log_error_errno(errno, "Can't stat %s: %m", loop_dev);

        if (!S_ISBLK(st.st_mode))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Invalid file type: %s", loop_dev);

        r = sd_device_new_from_stat_rdev(&d, &st);
        if (r < 0)
                return log_error_errno(r, "Failed to get device from device number: %m");

        if (sd_device_get_property_value(d, "ID_FS_USAGE", &v) < 0 || !streq(v, "filesystem"))
                return log_device_error_errno(d, SYNTHETIC_ERRNO(EINVAL),
                                              "%s does not contain a known file system.", arg_mount_what);

        r = acquire_mount_type(d);
        if (r < 0)
                return r;

        r = acquire_mount_options(d);
        if (r < 0)
                return r;

        r = acquire_mount_where_for_loop_dev(loop_dev);
        if (r < 0)
                return r;

        r = acquire_description(d);
        if (r < 0)
                return r;

        return 0;
}

static int discover_device(void) {
        _cleanup_(sd_device_unrefp) sd_device *d = NULL;
        struct stat st;
        const char *v;
        int r;

        if (stat(arg_mount_what, &st) < 0)
                return log_error_errno(errno, "Can't stat %s: %m", arg_mount_what);

        if (S_ISREG(st.st_mode))
                return discover_loop_backing_file();

        if (!S_ISBLK(st.st_mode))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Invalid file type: %s",
                                       arg_mount_what);

        r = sd_device_new_from_stat_rdev(&d, &st);
        if (r < 0)
                return log_error_errno(r, "Failed to get device from device number: %m");

        if (sd_device_get_property_value(d, "ID_FS_USAGE", &v) < 0 || !streq(v, "filesystem"))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "%s does not contain a known file system.",
                                       arg_mount_what);

        r = acquire_mount_type(d);
        if (r < 0)
                return r;

        r = acquire_mount_options(d);
        if (r < 0)
                return r;

        r = acquire_mount_where(d);
        if (r < 0)
                return r;

        r = acquire_description(d);
        if (r < 0)
                return r;

        r = acquire_removable(d);
        if (r < 0)
                return r;

        return 0;
}

enum {
        COLUMN_NODE,
        COLUMN_PATH,
        COLUMN_MODEL,
        COLUMN_WWN,
        COLUMN_FSTYPE,
        COLUMN_LABEL,
        COLUMN_UUID,
        _COLUMN_MAX,
};

static int list_devices(void) {
        _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
        _cleanup_(table_unrefp) Table *table = NULL;
        sd_device *d;
        unsigned c;
        int r;

        r = sd_device_enumerator_new(&e);
        if (r < 0)
                return log_oom();

        r = sd_device_enumerator_add_match_subsystem(e, "block", true);
        if (r < 0)
                return log_error_errno(r, "Failed to add block match: %m");

        r = sd_device_enumerator_add_match_property(e, "ID_FS_USAGE", "filesystem");
        if (r < 0)
                return log_error_errno(r, "Failed to add property match: %m");

        table = table_new("NODE", "PATH", "MODEL", "WWN", "TYPE", "LABEL", "UUID");
        if (!table)
                return log_oom();

        if (arg_full)
                table_set_width(table, 0);

        r = table_set_sort(table, (size_t) 0);
        if (r < 0)
                return log_error_errno(r, "Failed to set sort index: %m");

        table_set_header(table, arg_legend);

        FOREACH_DEVICE(e, d) {
                for (c = 0; c < _COLUMN_MAX; c++) {
                        const char *x = NULL;

                        switch (c) {

                        case COLUMN_NODE:
                                (void) sd_device_get_devname(d, &x);
                                break;

                        case COLUMN_PATH:
                                (void) sd_device_get_property_value(d, "ID_PATH", &x);
                                break;

                        case COLUMN_MODEL:
                                x = get_model(d);
                                break;

                        case COLUMN_WWN:
                                (void) sd_device_get_property_value(d, "ID_WWN", &x);
                                break;

                        case COLUMN_FSTYPE:
                                (void) sd_device_get_property_value(d, "ID_FS_TYPE", &x);
                                break;

                        case COLUMN_LABEL:
                                x = get_label(d);
                                break;

                        case COLUMN_UUID:
                                (void) sd_device_get_property_value(d, "ID_FS_UUID", &x);
                                break;
                        }

                        r = table_add_cell(table, NULL, c == COLUMN_NODE ? TABLE_PATH : TABLE_STRING, strna(x));
                        if (r < 0)
                                return table_log_add_error(r);
                }
        }

        pager_open(arg_pager_flags);

        r = table_print(table, NULL);
        if (r < 0)
                return table_log_print_error(r);

        return 0;
}

static int run(int argc, char* argv[]) {
        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
        int r;

        log_show_color(true);
        log_parse_environment();
        log_open();

        r = parse_argv(argc, argv);
        if (r <= 0)
                return r;

        if (arg_action == ACTION_LIST)
                return list_devices();

        r = bus_connect_transport_systemd(arg_transport, arg_host, arg_user, &bus);
        if (r < 0)
                return bus_log_connect_error(r, arg_transport);

        if (arg_action == ACTION_UMOUNT)
                return action_umount(bus, argc, argv);

        if ((!arg_mount_type || fstype_is_blockdev_backed(arg_mount_type))
            && !path_is_normalized(arg_mount_what))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Path contains non-normalized components: %s",
                                       arg_mount_what);

        if (arg_discover) {
                r = discover_device();
                if (r < 0)
                        return r;
        }

        if (!arg_mount_where)
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Can't figure out where to mount %s.",
                                       arg_mount_what);

        if (path_equal(arg_mount_where, "/"))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Refusing to operate on root directory.");

        if (!path_is_normalized(arg_mount_where))
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "Path contains non-normalized components: %s",
                                       arg_mount_where);

        if (streq_ptr(arg_mount_type, "auto"))
                arg_mount_type = mfree(arg_mount_type);
        if (streq_ptr(arg_mount_options, "defaults"))
                arg_mount_options = mfree(arg_mount_options);

        if (!is_device_path(arg_mount_what))
                arg_fsck = false;

        if (arg_fsck && arg_mount_type && arg_transport == BUS_TRANSPORT_LOCAL) {
                r = fsck_exists_for_fstype(arg_mount_type);
                if (r < 0)
                        log_warning_errno(r, "Couldn't determine whether fsck for %s exists, proceeding anyway.", arg_mount_type);
                else if (r == 0) {
                        log_debug("Disabling file system check as fsck for %s doesn't exist.", arg_mount_type);
                        arg_fsck = false; /* fsck doesn't exist, let's not attempt it */
                }
        }

        /* The kernel (properly) refuses mounting file systems with unknown uid=,gid= options,
         * but not for all filesystem types. Let's try to catch the cases where the option
         * would be used if the file system does not support it. It is also possible to
         * autodetect the file system, but that's only possible with disk-based file systems
         * which incidentally seem to be implemented more carefully and reject unknown options,
         * so it's probably OK that we do the check only when the type is specified.
         */
        if (arg_mount_type &&
            !streq(arg_mount_type, "auto") &&
            arg_uid != UID_INVALID &&
            !fstype_can_uid_gid(arg_mount_type))
                return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
                                       "File system type %s is not known to support uid=/gid=, refusing.",
                                       arg_mount_type);

        switch (arg_action) {

        case ACTION_MOUNT:
        case ACTION_DEFAULT:
                r = start_transient_mount(bus, argv + optind);
                break;

        case ACTION_AUTOMOUNT:
                r = start_transient_automount(bus, argv + optind);
                break;

        default:
                assert_not_reached();
        }

        return r;
}

DEFINE_MAIN_FUNCTION(run);