2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
23 #include <sys/types.h>
25 #include <sys/mount.h>
31 #include <libubox/list.h>
32 #include <libubox/vlist.h>
33 #include <libubox/blobmsg_json.h>
34 #include <libubox/avl-cmp.h>
36 #include "libblkid-tiny/libblkid-tiny.h"
44 struct vlist_node node
;
59 static struct vlist_tree mounts
;
60 static struct blob_buf b
;
61 static LIST_HEAD(devices
);
62 static int anon_mount
, anon_swap
, auto_mount
, auto_swap
, check_fs
;
63 static unsigned int delay_root
;
75 static const struct blobmsg_policy config_policy
[__CFG_MAX
] = {
76 [CFG_ANON_SWAP
] = { .name
= "anon_swap", .type
= BLOBMSG_TYPE_INT32
},
77 [CFG_ANON_MOUNT
] = { .name
= "anon_mount", .type
= BLOBMSG_TYPE_INT32
},
78 [CFG_AUTO_SWAP
] = { .name
= "auto_swap", .type
= BLOBMSG_TYPE_INT32
},
79 [CFG_AUTO_MOUNT
] = { .name
= "auto_mount", .type
= BLOBMSG_TYPE_INT32
},
80 [CFG_DELAY_ROOT
] = { .name
= "delay_root", .type
= BLOBMSG_TYPE_INT32
},
81 [CFG_CHECK_FS
] = { .name
= "check_fs", .type
= BLOBMSG_TYPE_INT32
},
94 static const struct uci_blob_param_list config_attr_list
= {
95 .n_params
= __CFG_MAX
,
96 .params
= config_policy
,
99 static const struct blobmsg_policy mount_policy
[__MOUNT_MAX
] = {
100 [MOUNT_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
101 [MOUNT_LABEL
] = { .name
= "label", .type
= BLOBMSG_TYPE_STRING
},
102 [MOUNT_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
103 [MOUNT_TARGET
] = { .name
= "target", .type
= BLOBMSG_TYPE_STRING
},
104 [MOUNT_OPTIONS
] = { .name
= "options", .type
= BLOBMSG_TYPE_STRING
},
105 [MOUNT_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
108 static const struct uci_blob_param_list mount_attr_list
= {
109 .n_params
= __MOUNT_MAX
,
110 .params
= mount_policy
,
121 static const struct blobmsg_policy swap_policy
[__SWAP_MAX
] = {
122 [SWAP_ENABLE
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_INT32
},
123 [SWAP_UUID
] = { .name
= "uuid", .type
= BLOBMSG_TYPE_STRING
},
124 [SWAP_DEVICE
] = { .name
= "device", .type
= BLOBMSG_TYPE_STRING
},
125 [SWAP_PRIO
] = { .name
= "priority", .type
= BLOBMSG_TYPE_INT32
},
128 static const struct uci_blob_param_list swap_attr_list
= {
129 .n_params
= __SWAP_MAX
,
130 .params
= swap_policy
,
133 static char *blobmsg_get_strdup(struct blob_attr
*attr
)
138 return strdup(blobmsg_get_string(attr
));
141 static char *blobmsg_get_basename(struct blob_attr
*attr
)
146 return strdup(basename(blobmsg_get_string(attr
)));
149 static int mount_add(struct uci_section
*s
)
151 struct blob_attr
*tb
[__MOUNT_MAX
] = { 0 };
154 blob_buf_init(&b
, 0);
155 uci_to_blob(&b
, s
, &mount_attr_list
);
156 blobmsg_parse(mount_policy
, __MOUNT_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
158 if (!tb
[MOUNT_LABEL
] && !tb
[MOUNT_UUID
] && !tb
[MOUNT_DEVICE
])
161 if (tb
[MOUNT_ENABLE
] && !blobmsg_get_u32(tb
[MOUNT_ENABLE
]))
164 m
= malloc(sizeof(struct mount
));
165 m
->type
= TYPE_MOUNT
;
166 m
->uuid
= blobmsg_get_strdup(tb
[MOUNT_UUID
]);
167 m
->label
= blobmsg_get_strdup(tb
[MOUNT_LABEL
]);
168 m
->target
= blobmsg_get_strdup(tb
[MOUNT_TARGET
]);
169 m
->options
= blobmsg_get_strdup(tb
[MOUNT_OPTIONS
]);
170 m
->device
= blobmsg_get_basename(tb
[MOUNT_DEVICE
]);
171 m
->overlay
= m
->extroot
= 0;
172 if (m
->target
&& !strcmp(m
->target
, "/"))
174 if (m
->target
&& !strcmp(m
->target
, "/overlay"))
175 m
->extroot
= m
->overlay
= 1;
178 vlist_add(&mounts
, &m
->node
, m
->uuid
);
180 vlist_add(&mounts
, &m
->node
, m
->label
);
182 vlist_add(&mounts
, &m
->node
, m
->device
);
187 static int swap_add(struct uci_section
*s
)
189 struct blob_attr
*tb
[__SWAP_MAX
] = { 0 };
192 blob_buf_init(&b
, 0);
193 uci_to_blob(&b
, s
, &swap_attr_list
);
194 blobmsg_parse(swap_policy
, __SWAP_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
196 if (!tb
[SWAP_UUID
] && !tb
[SWAP_DEVICE
])
199 m
= malloc(sizeof(struct mount
));
200 memset(m
, 0, sizeof(struct mount
));
202 m
->uuid
= blobmsg_get_strdup(tb
[SWAP_UUID
]);
203 m
->device
= blobmsg_get_basename(tb
[SWAP_DEVICE
]);
205 m
->prio
= blobmsg_get_u32(tb
[SWAP_PRIO
]);
207 m
->prio
= ((m
->prio
<< SWAP_FLAG_PRIO_SHIFT
) & SWAP_FLAG_PRIO_MASK
) | SWAP_FLAG_PREFER
;
209 if ((!tb
[SWAP_ENABLE
]) || blobmsg_get_u32(tb
[SWAP_ENABLE
]))
210 vlist_add(&mounts
, &m
->node
, (m
->uuid
) ? (m
->uuid
) : (m
->device
));
215 static int global_add(struct uci_section
*s
)
217 struct blob_attr
*tb
[__CFG_MAX
] = { 0 };
219 blob_buf_init(&b
, 0);
220 uci_to_blob(&b
, s
, &config_attr_list
);
221 blobmsg_parse(config_policy
, __CFG_MAX
, tb
, blob_data(b
.head
), blob_len(b
.head
));
223 if ((tb
[CFG_ANON_MOUNT
]) && blobmsg_get_u32(tb
[CFG_ANON_MOUNT
]))
225 if ((tb
[CFG_ANON_SWAP
]) && blobmsg_get_u32(tb
[CFG_ANON_SWAP
]))
228 if ((tb
[CFG_AUTO_MOUNT
]) && blobmsg_get_u32(tb
[CFG_AUTO_MOUNT
]))
230 if ((tb
[CFG_AUTO_SWAP
]) && blobmsg_get_u32(tb
[CFG_AUTO_SWAP
]))
233 if (tb
[CFG_DELAY_ROOT
])
234 delay_root
= blobmsg_get_u32(tb
[CFG_DELAY_ROOT
]);
236 if ((tb
[CFG_CHECK_FS
]) && blobmsg_get_u32(tb
[CFG_CHECK_FS
]))
242 static struct mount
* find_swap(const char *uuid
, const char *device
)
246 vlist_for_each_element(&mounts
, m
, node
) {
247 if (m
->type
!= TYPE_SWAP
)
249 if (uuid
&& m
->uuid
&& !strcmp(m
->uuid
, uuid
))
251 if (device
&& m
->device
&& !strcmp(m
->device
, device
))
258 static struct mount
* find_block(const char *uuid
, const char *label
, const char *device
,
263 vlist_for_each_element(&mounts
, m
, node
) {
264 if (m
->type
!= TYPE_MOUNT
)
266 if (m
->uuid
&& uuid
&& !strcmp(m
->uuid
, uuid
))
268 if (m
->label
&& label
&& !strcmp(m
->label
, label
))
270 if (m
->target
&& target
&& !strcmp(m
->target
, target
))
272 if (m
->device
&& device
&& !strcmp(m
->device
, device
))
279 static void mounts_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
280 struct vlist_node
*node_old
)
284 static int config_load(char *cfg
)
286 struct uci_context
*ctx
;
287 struct uci_package
*pkg
;
288 struct uci_element
*e
;
290 vlist_init(&mounts
, avl_strcmp
, mounts_update
);
292 ctx
= uci_alloc_context();
295 snprintf(path
, 32, "%s/etc/config", cfg
);
296 uci_set_confdir(ctx
, path
);
299 if (uci_load(ctx
, "fstab", &pkg
))
302 vlist_update(&mounts
);
303 uci_foreach_element(&pkg
->sections
, e
) {
304 struct uci_section
*s
= uci_to_section(e
);
306 if (!strcmp(s
->type
, "mount"))
308 if (!strcmp(s
->type
, "swap"))
310 if (!strcmp(s
->type
, "global"))
313 vlist_flush(&mounts
);
318 static int _cache_load(const char *path
)
320 int gl_flags
= GLOB_NOESCAPE
| GLOB_MARK
;
324 if (glob(path
, gl_flags
, NULL
, &gl
) < 0)
327 for (j
= 0; j
< gl
.gl_pathc
; j
++) {
328 struct blkid_struct_probe
*pr
= malloc(sizeof(struct blkid_struct_probe
));
329 memset(pr
, 0, sizeof(struct blkid_struct_probe
));
330 probe_block(gl
.gl_pathv
[j
], pr
);
331 if (pr
->err
|| !pr
->id
)
334 list_add_tail(&pr
->list
, &devices
);
342 static void cache_load(int mtd
)
345 _cache_load("/dev/mtdblock*");
346 _cache_load("/dev/mmcblk*");
347 _cache_load("/dev/sd*");
348 _cache_load("/dev/sdc*");
349 _cache_load("/dev/hd*");
350 _cache_load("/dev/md*");
351 _cache_load("/dev/mapper/*");
354 static int print_block_info(struct blkid_struct_probe
*pr
)
356 printf("%s:", pr
->dev
);
358 printf(" UUID=\"%s\"", pr
->uuid
);
361 printf(" LABEL=\"%s\"", pr
->label
);
364 printf(" NAME=\"%s\"", pr
->name
);
367 printf(" VERSION=\"%s\"", pr
->version
);
369 printf(" TYPE=\"%s\"\n", pr
->id
->name
);
374 static int print_block_uci(struct blkid_struct_probe
*pr
)
376 if (!strcmp(pr
->id
->name
, "swap")) {
377 printf("config 'swap'\n");
379 printf("config 'mount'\n");
380 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr
->dev
));
383 printf("\toption\tuuid\t'%s'\n", pr
->uuid
);
385 printf("\toption\tdevice\t'%s'\n", pr
->dev
);
386 printf("\toption\tenabled\t'0'\n\n");
391 static struct blkid_struct_probe
* find_block_info(char *uuid
, char *label
, char *path
)
393 struct blkid_struct_probe
*pr
= NULL
;
396 list_for_each_entry(pr
, &devices
, list
)
397 if (!strcmp(pr
->uuid
, uuid
))
401 list_for_each_entry(pr
, &devices
, list
)
402 if (strcmp(pr
->label
, label
))
406 list_for_each_entry(pr
, &devices
, list
)
407 if (!strcmp(pr
->dev
, path
))
413 static char* find_mount_point(char *block
)
415 FILE *fp
= fopen("/proc/mounts", "r");
416 static char line
[256];
417 int len
= strlen(block
);
423 while (fgets(line
, sizeof(line
), fp
)) {
424 if (!strncmp(line
, block
, len
)) {
425 char *p
= &line
[len
+ 1];
426 char *t
= strstr(p
, " ");
441 static void mkdir_p(char *dir
)
443 char *l
= strrchr(dir
, '/');
453 static void check_filesystem(struct blkid_struct_probe
*pr
)
457 char *e2fsck
= "/usr/sbin/e2fsck";
459 if (strncmp(pr
->id
->name
, "ext", 3)) {
460 fprintf(stderr
, "check_filesystem: %s is not supported\n", pr
->id
->name
);
464 if (stat(e2fsck
, &statbuf
) < 0) {
465 fprintf(stderr
, "check_filesystem: %s not found\n", e2fsck
);
471 execl(e2fsck
, e2fsck
, "-p", pr
->dev
, NULL
);
473 } else if (pid
> 0) {
476 waitpid(pid
, &status
, 0);
477 if (WEXITSTATUS(status
))
478 fprintf(stderr
, "check_filesystem: %s returned %d\n", e2fsck
, WEXITSTATUS(status
));
482 static int mount_device(struct blkid_struct_probe
*pr
, int hotplug
)
490 device
= basename(pr
->dev
);
492 if (!strcmp(pr
->id
->name
, "swap")) {
493 if (hotplug
&& !auto_swap
)
495 m
= find_swap(pr
->uuid
, device
);
497 swapon(pr
->dev
, (m
) ? (m
->prio
) : (0));
502 if (hotplug
&& !auto_mount
)
505 if (find_mount_point(pr
->dev
)) {
506 fprintf(stderr
, "%s is already mounted\n", pr
->dev
);
510 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
515 char *target
= m
->target
;
520 snprintf(_target
, sizeof(_target
), "/mnt/%s", device
);
526 check_filesystem(pr
);
528 err
= mount(pr
->dev
, target
, pr
->id
->name
, 0, (m
->options
) ? (m
->options
) : (""));
530 fprintf(stderr
, "mounting %s (%s) as %s failed (%d) - %s\n",
531 pr
->dev
, pr
->id
->name
, target
, err
, strerror(err
));
536 char target
[] = "/mnt/mmcblk123";
539 snprintf(target
, sizeof(target
), "/mnt/%s", device
);
543 check_filesystem(pr
);
545 err
= mount(pr
->dev
, target
, pr
->id
->name
, 0, "");
547 fprintf(stderr
, "mounting %s (%s) as %s failed (%d) - %s\n",
548 pr
->dev
, pr
->id
->name
, target
, err
, strerror(err
));
555 static int umount_device(struct blkid_struct_probe
*pr
)
558 char *device
= basename(pr
->dev
);
565 if (!strcmp(pr
->id
->name
, "swap"))
568 mp
= find_mount_point(pr
->dev
);
572 m
= find_block(pr
->uuid
, pr
->label
, device
, NULL
);
576 err
= umount2(mp
, MNT_DETACH
);
578 fprintf(stderr
, "unmounting %s (%s) failed (%d) - %s\n",
579 pr
->dev
, mp
, err
, strerror(err
));
581 fprintf(stderr
, "unmounted %s (%s)\n",
587 static int main_hotplug(int argc
, char **argv
)
590 char *action
, *device
, *mount_point
;
592 action
= getenv("ACTION");
593 device
= getenv("DEVNAME");
595 if (!action
|| !device
)
597 snprintf(path
, sizeof(path
), "/dev/%s", device
);
599 if (!strcmp(action
, "remove")) {
601 mount_point
= find_mount_point(path
);
603 err
= umount2(mount_point
, MNT_DETACH
);
606 fprintf(stderr
, "umount of %s failed (%d) - %s\n",
607 mount_point
, err
, strerror(err
));
610 } else if (strcmp(action
, "add")) {
611 fprintf(stderr
, "Unkown action %s\n", action
);
616 if (config_load(NULL
))
620 return mount_device(find_block_info(NULL
, NULL
, path
), 1);
623 static int find_block_mtd(char *name
, char *part
, int plen
)
625 FILE *fp
= fopen("/proc/mtd", "r");
626 static char line
[256];
632 while (!index
&& fgets(line
, sizeof(line
), fp
)) {
633 if (strstr(line
, name
)) {
634 char *eol
= strstr(line
, ":");
649 snprintf(part
, plen
, "/dev/mtdblock%s", index
);
654 static int check_extroot(char *path
)
656 struct blkid_struct_probe
*pr
= NULL
;
659 if (find_block_mtd("rootfs", fs
, sizeof(fs
)))
662 list_for_each_entry(pr
, &devices
, list
) {
663 if (!strcmp(pr
->dev
, fs
)) {
667 char uuid
[32] = { 0 };
669 snprintf(tag
, sizeof(tag
), "%s/etc/.extroot-uuid", path
);
671 fp
= fopen(tag
, "w+");
673 fprintf(stderr
, "extroot: failed to write uuid tag file\n");
674 /* return 0 to continue boot regardless of error */
682 fp
= fopen(tag
, "r");
684 fprintf(stderr
, "extroot: failed to open uuid tag file\n");
688 fgets(uuid
, sizeof(uuid
), fp
);
690 if (!strcmp(uuid
, pr
->uuid
))
692 fprintf(stderr
, "extroot: uuid tag does not match rom uuid\n");
698 static int mount_extroot(char *cfg
)
700 char overlay
[] = "/tmp/extroot/overlay";
701 char mnt
[] = "/tmp/extroot/mnt";
703 struct blkid_struct_probe
*pr
;
707 if (config_load(cfg
))
710 m
= find_block(NULL
, NULL
, NULL
, "/");
712 m
= find_block(NULL
, NULL
, NULL
, "/overlay");
714 if (!m
|| !m
->extroot
)
717 pr
= find_block_info(m
->uuid
, m
->label
, NULL
);
719 if (!pr
&& delay_root
){
720 fprintf(stderr
, "extroot: is not ready yet, retrying in %ui seconds\n", delay_root
);
724 pr
= find_block_info(m
->uuid
, m
->label
, NULL
);
727 if (strncmp(pr
->id
->name
, "ext", 3)) {
728 fprintf(stderr
, "extroot: %s is not supported, try ext4\n", pr
->id
->name
);
736 check_filesystem(pr
);
738 err
= mount(pr
->dev
, path
, pr
->id
->name
, 0, (m
->options
) ? (m
->options
) : (""));
741 fprintf(stderr
, "mounting %s (%s) as %s failed (%d) - %s\n",
742 pr
->dev
, pr
->id
->name
, path
, err
, strerror(err
));
743 } else if (m
->overlay
) {
744 err
= check_extroot(path
);
753 static int main_extroot(int argc
, char **argv
)
755 struct blkid_struct_probe
*pr
;
757 char fs_data
[32] = { 0 };
760 if (!getenv("PREINIT"))
764 fprintf(stderr
, "Usage: block extroot mountpoint\n");
771 find_block_mtd("rootfs", fs
, sizeof(fs
));
775 pr
= find_block_info(NULL
, NULL
, fs
);
779 find_block_mtd("rootfs_data", fs_data
, sizeof(fs_data
));
781 pr
= find_block_info(NULL
, NULL
, fs_data
);
782 if (pr
&& !strcmp(pr
->id
->name
, "jffs2")) {
783 char cfg
[] = "/tmp/jffs_cfg";
786 if (!mount(fs_data
, cfg
, "jffs2", MS_NOATIME
, NULL
)) {
787 err
= mount_extroot(cfg
);
788 umount2(cfg
, MNT_DETACH
);
791 rmdir("/tmp/overlay");
797 return mount_extroot(NULL
);
800 static int main_mount(int argc
, char **argv
)
802 struct blkid_struct_probe
*pr
;
804 if (config_load(NULL
))
808 list_for_each_entry(pr
, &devices
, list
)
814 static int main_umount(int argc
, char **argv
)
816 struct blkid_struct_probe
*pr
;
818 if (config_load(NULL
))
822 list_for_each_entry(pr
, &devices
, list
)
828 static int main_detect(int argc
, char **argv
)
830 struct blkid_struct_probe
*pr
;
833 printf("config 'global'\n");
834 printf("\toption\tanon_swap\t'0'\n");
835 printf("\toption\tanon_mount\t'0'\n");
836 printf("\toption\tauto_swap\t'1'\n");
837 printf("\toption\tauto_mount\t'1'\n");
838 printf("\toption\tdelay_root\t'0'\n");
839 printf("\toption\tcheck_fs\t'0'\n\n");
840 list_for_each_entry(pr
, &devices
, list
)
846 static int main_info(int argc
, char **argv
)
849 struct blkid_struct_probe
*pr
;
853 list_for_each_entry(pr
, &devices
, list
)
854 print_block_info(pr
);
859 for (i
= 2; i
< argc
; i
++) {
862 if (stat(argv
[i
], &s
)) {
863 fprintf(stderr
, "failed to stat %s\n", argv
[i
]);
866 if (!S_ISBLK(s
.st_mode
)) {
867 fprintf(stderr
, "%s is not a block device\n", argv
[i
]);
870 pr
= find_block_info(NULL
, NULL
, argv
[i
]);
872 print_block_info(pr
);
878 static int main_swapon(int argc
, char **argv
)
881 fprintf(stderr
, "Usage: swapon <-s> <-a> [DEVICE]\n\n\tStart swapping on [DEVICE]\n -a\tStart swapping on all swap devices\n -s\tShow summary\n");
885 if (!strcmp(argv
[1], "-s")) {
886 FILE *fp
= fopen("/proc/swaps", "r");
887 char *lineptr
= NULL
;
891 fprintf(stderr
, "failed to open /proc/swaps\n");
894 while (getline(&lineptr
, &s
, fp
) > 0)
899 } else if (!strcmp(argv
[1], "-a")) {
900 struct blkid_struct_probe
*pr
;
903 list_for_each_entry(pr
, &devices
, list
) {
904 if (strcmp(pr
->id
->name
, "swap"))
906 if (swapon(pr
->dev
, 0))
907 fprintf(stderr
, "failed to swapon %s\n", pr
->dev
);
913 if (stat(argv
[1], &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
))) {
914 fprintf(stderr
, "%s is not a block device or file\n", argv
[1]);
917 err
= swapon(argv
[1], 0);
919 fprintf(stderr
, "failed to swapon %s (%d)\n", argv
[1], err
);
927 static int main_swapoff(int argc
, char **argv
)
930 fprintf(stderr
, "Usage: swapoff [-a] [DEVICE]\n\n\tStop swapping on DEVICE\n -a\tStop swapping on all swap devices\n");
934 if (!strcmp(argv
[1], "-a")) {
935 FILE *fp
= fopen("/proc/swaps", "r");
939 fprintf(stderr
, "failed to open /proc/swaps\n");
942 fgets(line
, sizeof(line
), fp
);
943 while (fgets(line
, sizeof(line
), fp
)) {
944 char *end
= strchr(line
, ' ');
952 fprintf(stderr
, "failed to swapoff %s (%d)\n", line
, err
);
959 if (stat(argv
[1], &s
) || (!S_ISBLK(s
.st_mode
) && !S_ISREG(s
.st_mode
))) {
960 fprintf(stderr
, "%s is not a block device or file\n", argv
[1]);
963 err
= swapoff(argv
[1]);
965 fprintf(stderr
, "fsiled to swapoff %s (%d)\n", argv
[1], err
);
973 int main(int argc
, char **argv
)
975 char *base
= basename(*argv
);
979 if (!strcmp(base
, "swapon"))
980 return main_swapon(argc
, argv
);
982 if (!strcmp(base
, "swapoff"))
983 return main_swapoff(argc
, argv
);
985 if ((argc
> 1) && !strcmp(base
, "block")) {
986 if (!strcmp(argv
[1], "info"))
987 return main_info(argc
, argv
);
989 if (!strcmp(argv
[1], "detect"))
990 return main_detect(argc
, argv
);
992 if (!strcmp(argv
[1], "hotplug"))
993 return main_hotplug(argc
, argv
);
995 if (!strcmp(argv
[1], "extroot"))
996 return main_extroot(argc
, argv
);
998 if (!strcmp(argv
[1], "mount"))
999 return main_mount(argc
, argv
);
1001 if (!strcmp(argv
[1], "umount"))
1002 return main_umount(argc
, argv
);
1005 fprintf(stderr
, "Usage: block <info|mount|umount|detect>\n");