1 /* vi: set sw=4 ts=4: */
3 * Mini mount implementation for busybox
5 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
6 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Copyright (C) 2005-2006 by Rob Landley <rob@landley.net>
9 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
12 /* Design notes: There is no spec for mount. Remind me to write one.
14 mount_main() calls singlemount() which calls mount_it_now().
16 mount_main() can loop through /etc/fstab for mount -a
17 singlemount() can loop through /etc/filesystems for fstype detection.
18 mount_it_now() does the actual mount.
25 #if ENABLE_FEATURE_MOUNT_LABEL
26 /* For FEATURE_MOUNT_LABEL only */
27 #include "volume_id.h"
30 /* Needed for nfs support only */
31 #include <sys/utsname.h>
35 #include <rpc/pmap_prot.h>
36 #include <rpc/pmap_clnt.h>
39 #define MS_SILENT (1 << 15)
41 /* Grab more as needed from util-linux's mount/mount_constants.h */
43 #define MS_DIRSYNC 128 /* Directory modifications are synchronous */
47 #if defined(__dietlibc__)
48 /* 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
49 * dietlibc-0.30 does not have implementation of getmntent_r() */
50 static struct mntent *getmntent_r(FILE* stream, struct mntent* result, char* buffer, int bufsize)
52 struct mntent* ment = getmntent(stream);
53 memcpy(result, ment, sizeof(struct mntent));
59 // Not real flags, but we want to be able to check for this.
61 MOUNT_USERS = (1 << 28) * ENABLE_DESKTOP,
62 MOUNT_NOAUTO = (1 << 29),
63 MOUNT_SWAP = (1 << 30),
67 #define OPTION_STR "o:t:rwanfvsi"
81 #if ENABLE_FEATURE_MTAB_SUPPORT
82 #define useMtab (!(option_mask32 & OPT_n))
87 #if ENABLE_FEATURE_MOUNT_FAKE
88 #define fakeIt (option_mask32 & OPT_f)
94 // TODO: more "user" flag compatibility.
95 // "user" option (from mount manpage):
96 // Only the user that mounted a filesystem can unmount it again.
97 // If any user should be able to unmount, then use users instead of user
98 // in the fstab line. The owner option is similar to the user option,
99 // with the restriction that the user must be the owner of the special file.
100 // This may be useful e.g. for /dev/fd if a login script makes
101 // the console user owner of this device.
103 /* Standard mount options (from -o options or --options), with corresponding
106 static const int32_t mount_options[] = {
107 // MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs.
109 USE_FEATURE_MOUNT_LOOP(
113 USE_FEATURE_MOUNT_FSTAB(
115 /* "quiet" 0 - do not filter out, vfat wants to see it */
116 /* "noauto" */ MOUNT_NOAUTO,
117 /* "sw" */ MOUNT_SWAP,
118 /* "swap" */ MOUNT_SWAP,
119 USE_DESKTOP(/* "user" */ MOUNT_USERS,)
120 USE_DESKTOP(/* "users" */ MOUNT_USERS,)
124 USE_FEATURE_MOUNT_FLAGS(
126 /* "nosuid" */ MS_NOSUID,
127 /* "suid" */ ~MS_NOSUID,
128 /* "dev" */ ~MS_NODEV,
129 /* "nodev" */ MS_NODEV,
130 /* "exec" */ ~MS_NOEXEC,
131 /* "noexec" */ MS_NOEXEC,
132 /* "sync" */ MS_SYNCHRONOUS,
133 /* "dirsync" */ MS_DIRSYNC,
134 /* "async" */ ~MS_SYNCHRONOUS,
135 /* "atime" */ ~MS_NOATIME,
136 /* "noatime" */ MS_NOATIME,
137 /* "diratime" */ ~MS_NODIRATIME,
138 /* "nodiratime" */ MS_NODIRATIME,
139 /* "loud" */ ~MS_SILENT,
142 /* "bind" */ MS_BIND,
143 /* "move" */ MS_MOVE,
144 /* "shared" */ MS_SHARED,
145 /* "slave" */ MS_SLAVE,
146 /* "private" */ MS_PRIVATE,
147 /* "unbindable" */ MS_UNBINDABLE,
148 /* "rshared" */ MS_SHARED|MS_RECURSIVE,
149 /* "rslave" */ MS_SLAVE|MS_RECURSIVE,
150 /* "rprivate" */ MS_SLAVE|MS_RECURSIVE,
151 /* "runbindable" */ MS_UNBINDABLE|MS_RECURSIVE,
154 // Always understood.
155 /* "ro" */ MS_RDONLY, // vfs flag
156 /* "rw" */ ~MS_RDONLY, // vfs flag
157 /* "remount" */ MS_REMOUNT // action flag
160 static const char mount_option_str[] =
161 USE_FEATURE_MOUNT_LOOP(
164 USE_FEATURE_MOUNT_FSTAB(
166 /* "quiet" "\0" - do not filter out, vfat wants to see it */
170 USE_DESKTOP("user" "\0")
171 USE_DESKTOP("users" "\0")
174 USE_FEATURE_MOUNT_FLAGS(
204 // Always understood.
205 "ro" "\0" // vfs flag
206 "rw" "\0" // vfs flag
207 "remount" "\0" // action flag
212 #if ENABLE_FEATURE_MOUNT_NFS
213 smalluint nfs_mount_version;
215 #if ENABLE_FEATURE_MOUNT_VERBOSE
219 char getmntent_buf[1];
222 enum { GETMNTENT_BUFSIZE = COMMON_BUFSIZE - offsetof(struct globals, getmntent_buf) };
223 #define G (*(struct globals*)&bb_common_bufsiz1)
224 #define nfs_mount_version (G.nfs_mount_version)
225 #if ENABLE_FEATURE_MOUNT_VERBOSE
226 #define verbose (G.verbose )
230 #define fslist (G.fslist )
231 #define getmntent_buf (G.getmntent_buf )
234 #if ENABLE_FEATURE_MOUNT_VERBOSE
235 static int verbose_mount(const char *source, const char *target,
236 const char *filesystemtype,
237 unsigned long mountflags, const void *data)
242 rc = mount(source, target, filesystemtype, mountflags, data);
244 bb_perror_msg("mount('%s','%s','%s',0x%08lx,'%s'):%d",
245 source, target, filesystemtype,
246 mountflags, (char*)data, rc);
250 #define verbose_mount(...) mount(__VA_ARGS__)
253 static int resolve_mount_spec(char **fsname)
257 #if ENABLE_FEATURE_MOUNT_LABEL
258 if (!strncmp(*fsname, "UUID=", 5))
259 tmp = get_devname_from_uuid(*fsname + 5);
260 else if (!strncmp(*fsname, "LABEL=", 6))
261 tmp = get_devname_from_label(*fsname + 6);
271 /* Append mount options to string */
272 static void append_mount_options(char **oldopts, const char *newopts)
274 if (*oldopts && **oldopts) {
275 /* do not insert options which are already there */
278 int len = strlen(newopts);
279 p = strchr(newopts, ',');
280 if (p) len = p - newopts;
283 if (!strncmp(p, newopts, len)
284 && (p[len] == ',' || p[len] == '\0'))
290 p = xasprintf("%s,%.*s", *oldopts, len, newopts);
295 while (newopts[0] == ',') newopts++;
298 if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
299 *oldopts = xstrdup(newopts);
303 /* Use the mount_options list to parse options into flags.
304 * Also return list of unrecognized options if unrecognized!=NULL */
305 static long parse_mount_options(char *options, char **unrecognized)
307 long flags = MS_SILENT;
309 // Loop through options
312 char *comma = strchr(options, ',');
313 const char *option_str = mount_option_str;
315 if (comma) *comma = '\0';
317 // Find this option in mount_options
318 for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
319 if (!strcasecmp(option_str, options)) {
320 long fl = mount_options[i];
321 if (fl < 0) flags &= fl;
325 option_str += strlen(option_str) + 1;
327 // If unrecognized not NULL, append unrecognized mount options */
328 if (unrecognized && i == ARRAY_SIZE(mount_options)) {
329 // Add it to strflags, to pass on to kernel
330 i = *unrecognized ? strlen(*unrecognized) : 0;
331 *unrecognized = xrealloc(*unrecognized, i+strlen(options)+2);
333 // Comma separated if it's not the first one
334 if (i) (*unrecognized)[i++] = ',';
335 strcpy((*unrecognized)+i, options);
340 // Advance to next option
348 // Return a list of all block device backed filesystems
350 static llist_t *get_block_backed_filesystems(void)
352 static const char filesystems[2][sizeof("/proc/filesystems")] = {
361 for (i = 0; i < 2; i++) {
362 f = fopen(filesystems[i], "r");
365 while ((buf = xmalloc_getline(f)) != 0) {
366 if (!strncmp(buf, "nodev", 5) && isspace(buf[5]))
368 fs = skip_whitespace(buf);
369 if (*fs=='#' || *fs=='*' || !*fs) continue;
371 llist_add_to_end(&list, xstrdup(fs));
374 if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
380 #if ENABLE_FEATURE_CLEAN_UP
381 static void delete_block_backed_filesystems(void)
383 llist_free(fslist, free);
386 void delete_block_backed_filesystems(void);
389 // Perform actual mount of specific filesystem at specific location.
390 // NB: mp->xxx fields may be trashed on exit
391 static int mount_it_now(struct mntent *mp, long vfsflags, char *filteropts)
397 bb_error_msg("would do mount('%s','%s','%s',0x%08lx,'%s')",
398 mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
399 vfsflags, filteropts);
403 // Mount, with fallback to read-only if necessary.
406 rc = verbose_mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
407 vfsflags, filteropts);
409 // If mount failed, try
410 // helper program <mnt_type>
411 if (ENABLE_FEATURE_MOUNT_HELPERS && rc) {
413 int errno_save = errno;
414 args[0] = xasprintf("mount.%s", mp->mnt_type);
417 args[rc++] = (char *)"-o";
418 args[rc++] = filteropts;
420 args[rc++] = mp->mnt_fsname;
421 args[rc++] = mp->mnt_dir;
423 rc = wait4pid(spawn(args));
430 if (!rc || (vfsflags & MS_RDONLY) || (errno != EACCES && errno != EROFS))
432 if (!(vfsflags & MS_SILENT))
433 bb_error_msg("%s is write-protected, mounting read-only",
435 vfsflags |= MS_RDONLY;
438 // Abort entirely if permission denied.
440 if (rc && errno == EPERM)
441 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
443 /* If the mount was successful, and we're maintaining an old-style
444 * mtab file by hand, add the new entry to it now. */
446 if (useMtab && !rc && !(vfsflags & MS_REMOUNT)) {
448 FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
449 const char *option_str = mount_option_str;
453 bb_error_msg("no %s", bb_path_mtab_file);
457 // Add vfs string flags
459 for (i = 0; mount_options[i] != MS_REMOUNT; i++) {
460 if (mount_options[i] > 0 && (mount_options[i] & vfsflags))
461 append_mount_options(&(mp->mnt_opts), option_str);
462 option_str += strlen(option_str) + 1;
465 // Remove trailing / (if any) from directory we mounted on
467 i = strlen(mp->mnt_dir) - 1;
468 if (i > 0 && mp->mnt_dir[i] == '/') mp->mnt_dir[i] = '\0';
470 // Convert to canonical pathnames as needed
472 mp->mnt_dir = bb_simplify_path(mp->mnt_dir);
474 if (!mp->mnt_type || !*mp->mnt_type) { /* bind mount */
475 mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname);
476 mp->mnt_type = (char*)"bind";
478 mp->mnt_freq = mp->mnt_passno = 0;
482 addmntent(mountTable, mp);
483 endmntent(mountTable);
484 if (ENABLE_FEATURE_CLEAN_UP) {
493 #if ENABLE_FEATURE_MOUNT_NFS
497 * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
499 * Licensed under GPLv2, see file LICENSE in this tarball for details.
501 * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
502 * numbers to be specified on the command line.
504 * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
505 * Omit the call to connect() for Linux version 1.3.11 or later.
507 * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
508 * Implemented the "bg", "fg" and "retry" mount options for NFS.
510 * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
511 * - added Native Language Support
513 * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
517 /* This is just a warning of a common mistake. Possibly this should be a
518 * uclibc faq entry rather than in busybox... */
519 #if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
520 #error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support."
523 #define MOUNTPORT 635
524 #define MNTPATHLEN 1024
525 #define MNTNAMLEN 255
529 typedef char fhandle[FHSIZE];
532 unsigned int fhandle3_len;
544 MNT3ERR_NAMETOOLONG = 63,
545 MNT3ERR_NOTSUPP = 10004,
546 MNT3ERR_SERVERFAULT = 10006,
548 typedef enum mountstat3 mountstat3;
551 unsigned int fhs_status;
556 typedef struct fhstatus fhstatus;
558 struct mountres3_ok {
561 unsigned int auth_flavours_len;
562 char *auth_flavours_val;
565 typedef struct mountres3_ok mountres3_ok;
568 mountstat3 fhs_status;
570 mountres3_ok mountinfo;
573 typedef struct mountres3 mountres3;
575 typedef char *dirpath;
579 typedef struct mountbody *mountlist;
583 dirpath ml_directory;
586 typedef struct mountbody mountbody;
588 typedef struct groupnode *groups;
594 typedef struct groupnode groupnode;
596 typedef struct exportnode *exports;
603 typedef struct exportnode exportnode;
616 typedef struct ppathcnf ppathcnf;
618 #define MOUNTPROG 100005
621 #define MOUNTPROC_NULL 0
622 #define MOUNTPROC_MNT 1
623 #define MOUNTPROC_DUMP 2
624 #define MOUNTPROC_UMNT 3
625 #define MOUNTPROC_UMNTALL 4
626 #define MOUNTPROC_EXPORT 5
627 #define MOUNTPROC_EXPORTALL 6
629 #define MOUNTVERS_POSIX 2
631 #define MOUNTPROC_PATHCONF 7
635 #define MOUNTPROC3_NULL 0
636 #define MOUNTPROC3_MNT 1
637 #define MOUNTPROC3_DUMP 2
638 #define MOUNTPROC3_UMNT 3
639 #define MOUNTPROC3_UMNTALL 4
640 #define MOUNTPROC3_EXPORT 5
652 * We want to be able to compile mount on old kernels in such a way
653 * that the binary will work well on more recent kernels.
654 * Thus, if necessary we teach nfsmount.c the structure of new fields
655 * that will come later.
657 * Moreover, the new kernel includes conflict with glibc includes
658 * so it is easiest to ignore the kernel altogether (at compile time).
666 unsigned char data[64];
669 struct nfs_mount_data {
672 struct nfs2_fh old_root; /* 1 */
678 int acregmin; /* 1 */
679 int acregmax; /* 1 */
680 int acdirmin; /* 1 */
681 int acdirmax; /* 1 */
682 struct sockaddr_in addr; /* 1 */
683 char hostname[256]; /* 1 */
685 unsigned int bsize; /* 3 */
686 struct nfs3_fh root; /* 4 */
689 /* bits in the flags field */
691 NFS_MOUNT_SOFT = 0x0001, /* 1 */
692 NFS_MOUNT_INTR = 0x0002, /* 1 */
693 NFS_MOUNT_SECURE = 0x0004, /* 1 */
694 NFS_MOUNT_POSIX = 0x0008, /* 1 */
695 NFS_MOUNT_NOCTO = 0x0010, /* 1 */
696 NFS_MOUNT_NOAC = 0x0020, /* 1 */
697 NFS_MOUNT_TCP = 0x0040, /* 2 */
698 NFS_MOUNT_VER3 = 0x0080, /* 3 */
699 NFS_MOUNT_KERBEROS = 0x0100, /* 3 */
700 NFS_MOUNT_NONLM = 0x0200 /* 3 */
705 * We need to translate between nfs status return values and
706 * the local errno values which may not be the same.
708 * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
709 * "after #include <errno.h> the symbol errno is reserved for any use,
710 * it cannot even be used as a struct tag or field name".
714 #define EDQUOT ENOSPC
717 // Convert each NFSERR_BLAH into EBLAH
719 static const struct {
723 {0,0}, {1,EPERM}, {2,ENOENT}, {5,EIO}, {6,ENXIO}, {13,EACCES}, {17,EEXIST},
724 {19,ENODEV}, {20,ENOTDIR}, {21,EISDIR}, {22,EINVAL}, {27,EFBIG},
725 {28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT},
726 {70,ESTALE}, {71,EREMOTE}, {-1,EIO}
729 static char *nfs_strerror(int status)
733 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
734 if (nfs_errtbl[i].stat == status)
735 return strerror(nfs_errtbl[i].errnum);
737 return xasprintf("unknown nfs status return value: %d", status);
740 static bool_t xdr_fhandle(XDR *xdrs, fhandle objp)
742 if (!xdr_opaque(xdrs, objp, FHSIZE))
747 static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp)
749 if (!xdr_u_int(xdrs, &objp->fhs_status))
751 switch (objp->fhs_status) {
753 if (!xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle))
762 static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp)
764 if (!xdr_string(xdrs, objp, MNTPATHLEN))
769 static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp)
771 if (!xdr_bytes(xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3))
776 static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp)
778 if (!xdr_fhandle3(xdrs, &objp->fhandle))
780 if (!xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0,
781 sizeof (int), (xdrproc_t) xdr_int))
786 static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp)
788 if (!xdr_enum(xdrs, (enum_t *) objp))
793 static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp)
795 if (!xdr_mountstat3(xdrs, &objp->fhs_status))
797 switch (objp->fhs_status) {
799 if (!xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo))
808 #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
811 * Unfortunately, the kernel prints annoying console messages
812 * in case of an unexpected nfs mount version (instead of
813 * just returning some error). Therefore we'll have to try
814 * and figure out what version the kernel expects.
817 * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
818 * NFS_MOUNT_VERSION: these nfsmount sources at compile time
819 * nfs_mount_version: version this source and running kernel can handle
822 find_kernel_nfs_mount_version(void)
826 if (nfs_mount_version)
829 nfs_mount_version = 4; /* default */
831 kernel_version = get_linux_version_code();
832 if (kernel_version) {
833 if (kernel_version < KERNEL_VERSION(2,1,32))
834 nfs_mount_version = 1;
835 else if (kernel_version < KERNEL_VERSION(2,2,18) ||
836 (kernel_version >= KERNEL_VERSION(2,3,0) &&
837 kernel_version < KERNEL_VERSION(2,3,99)))
838 nfs_mount_version = 3;
839 /* else v4 since 2.3.99pre4 */
844 get_mountport(struct pmap *pm_mnt,
845 struct sockaddr_in *server_addr,
847 long unsigned version,
851 struct pmaplist *pmap;
853 server_addr->sin_port = PMAPPORT;
854 /* glibc 2.4 (still) has pmap_getmaps(struct sockaddr_in *).
855 * I understand it like "IPv6 for this is not 100% ready" */
856 pmap = pmap_getmaps(server_addr);
858 if (version > MAX_NFSPROT)
859 version = MAX_NFSPROT;
862 pm_mnt->pm_prog = prog;
863 pm_mnt->pm_vers = version;
864 pm_mnt->pm_prot = proto;
865 pm_mnt->pm_port = port;
868 if (pmap->pml_map.pm_prog != prog)
870 if (!version && pm_mnt->pm_vers > pmap->pml_map.pm_vers)
872 if (version > 2 && pmap->pml_map.pm_vers != version)
874 if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
876 if (pmap->pml_map.pm_vers > MAX_NFSPROT ||
877 (proto && pm_mnt->pm_prot && pmap->pml_map.pm_prot != proto) ||
878 (port && pmap->pml_map.pm_port != port))
880 memcpy(pm_mnt, &pmap->pml_map, sizeof(*pm_mnt));
882 pmap = pmap->pml_next;
884 if (!pm_mnt->pm_vers)
885 pm_mnt->pm_vers = MOUNTVERS;
886 if (!pm_mnt->pm_port)
887 pm_mnt->pm_port = MOUNTPORT;
888 if (!pm_mnt->pm_prot)
889 pm_mnt->pm_prot = IPPROTO_TCP;
893 static int daemonize(void)
897 if (pid < 0) /* error */
899 if (pid > 0) /* parent */
902 fd = xopen(bb_dev_null, O_RDWR);
906 while (fd > 2) close(fd--);
908 openlog(applet_name, LOG_PID, LOG_DAEMON);
909 logmode = LOGMODE_SYSLOG;
913 static inline int daemonize(void) { return -ENOSYS; }
917 static inline int we_saw_this_host_before(const char *hostname ATTRIBUTE_UNUSED)
922 /* RPC strerror analogs are terminally idiotic:
923 * *mandatory* prefix and \n at end.
924 * This hopefully helps. Usage:
925 * error_msg_rpc(clnt_*error*(" ")) */
926 static void error_msg_rpc(const char *msg)
929 while (msg[0] == ' ' || msg[0] == ':') msg++;
931 while (len && msg[len-1] == '\n') len--;
932 bb_error_msg("%.*s", len, msg);
935 // NB: mp->xxx fields may be trashed on exit
936 static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
942 struct nfs_mount_data data;
945 struct sockaddr_in server_addr;
946 struct sockaddr_in mount_server_addr;
949 struct fhstatus nfsv2;
950 struct mountres3 nfsv3;
976 find_kernel_nfs_mount_version();
984 /* NB: hostname, mounthost, filteropts must be free()d prior to return */
986 filteropts = xstrdup(filteropts); /* going to trash it later... */
988 hostname = xstrdup(mp->mnt_fsname);
989 /* mount_main() guarantees that ':' is there */
990 s = strchr(hostname, ':');
993 /* Ignore all but first hostname in replicated mounts
994 until they can be fully supported. (mack@sgi.com) */
995 s = strchr(hostname, ',');
998 bb_error_msg("warning: multiple hostnames not supported");
1001 server_addr.sin_family = AF_INET;
1002 if (!inet_aton(hostname, &server_addr.sin_addr)) {
1003 hp = gethostbyname(hostname);
1005 bb_herror_msg("%s", hostname);
1008 if (hp->h_length > sizeof(struct in_addr)) {
1009 bb_error_msg("got bad hp->h_length");
1010 hp->h_length = sizeof(struct in_addr);
1012 memcpy(&server_addr.sin_addr,
1013 hp->h_addr, hp->h_length);
1016 memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr));
1018 /* add IP address to mtab options for use when unmounting */
1020 if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */
1021 mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr));
1023 char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts,
1024 mp->mnt_opts[0] ? "," : "",
1025 inet_ntoa(server_addr.sin_addr));
1030 /* Set default options.
1031 * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
1032 * let the kernel decide.
1033 * timeo is filled in after we know whether it'll be TCP or UDP. */
1034 memset(&data, 0, sizeof(data));
1040 data.namlen = NAME_MAX;
1048 retry = 10000; /* 10000 minutes ~ 1 week */
1051 mountprog = MOUNTPROG;
1059 if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
1060 char *opteq = strchr(opt, '=');
1062 static const char options[] ALIGN1 =
1067 /* 4 */ "acregmin\0"
1068 /* 5 */ "acregmax\0"
1069 /* 6 */ "acdirmin\0"
1070 /* 7 */ "acdirmax\0"
1074 /* 11 */ "mountport\0"
1075 /* 12 */ "mounthost\0"
1076 /* 13 */ "mountprog\0"
1077 /* 14 */ "mountvers\0"
1078 /* 15 */ "nfsprog\0"
1079 /* 16 */ "nfsvers\0"
1084 int val = xatoi_u(opteq + 1);
1086 switch (index_in_strings(options, opt)) {
1096 case 3: // "retrans"
1099 case 4: // "acregmin"
1100 data.acregmin = val;
1102 case 5: // "acregmax"
1103 data.acregmax = val;
1105 case 6: // "acdirmin"
1106 data.acdirmin = val;
1108 case 7: // "acdirmax"
1109 data.acdirmax = val;
1111 case 8: // "actimeo"
1112 data.acregmin = val;
1113 data.acregmax = val;
1114 data.acdirmin = val;
1115 data.acdirmax = val;
1123 case 11: // "mountport"
1126 case 12: // "mounthost"
1127 mounthost = xstrndup(opteq+1,
1128 strcspn(opteq+1," \t\n\r,"));
1130 case 13: // "mountprog"
1133 case 14: // "mountvers"
1136 case 15: // "nfsprog"
1139 case 16: // "nfsvers"
1144 if (!strncmp(opteq+1, "tcp", 3))
1146 else if (!strncmp(opteq+1, "udp", 3))
1149 bb_error_msg("warning: unrecognized proto= option");
1151 case 19: // "namlen"
1152 if (nfs_mount_version >= 2)
1155 bb_error_msg("warning: option namlen is not supported\n");
1157 case 20: // "addr" - ignore
1160 bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
1165 static const char options[] ALIGN1 =
1178 if (!strncmp(opt, "no", 2)) {
1182 switch (index_in_strings(options, opt)) {
1218 if (nfs_mount_version >= 3)
1221 bb_error_msg("warning: option nolock is not supported");
1224 bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt);
1229 proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
1231 data.flags = (soft ? NFS_MOUNT_SOFT : 0)
1232 | (intr ? NFS_MOUNT_INTR : 0)
1233 | (posix ? NFS_MOUNT_POSIX : 0)
1234 | (nocto ? NFS_MOUNT_NOCTO : 0)
1235 | (noac ? NFS_MOUNT_NOAC : 0);
1236 if (nfs_mount_version >= 2)
1237 data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
1238 if (nfs_mount_version >= 3)
1239 data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
1240 if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
1241 bb_error_msg("NFSv%d not supported", nfsvers);
1244 if (nfsvers && !mountvers)
1245 mountvers = (nfsvers < 3) ? 1 : nfsvers;
1246 if (nfsvers && nfsvers < mountvers) {
1247 mountvers = nfsvers;
1250 /* Adjust options if none specified */
1252 data.timeo = tcp ? 70 : 7;
1254 data.version = nfs_mount_version;
1256 if (vfsflags & MS_REMOUNT)
1260 * If the previous mount operation on the same host was
1261 * backgrounded, and the "bg" for this mount is also set,
1262 * give up immediately, to avoid the initial timeout.
1264 if (bg && we_saw_this_host_before(hostname)) {
1265 daemonized = daemonize();
1266 if (daemonized <= 0) { /* parent or error */
1267 retval = -daemonized;
1272 /* create mount daemon client */
1273 /* See if the nfs host = mount host. */
1275 if (mounthost[0] >= '0' && mounthost[0] <= '9') {
1276 mount_server_addr.sin_family = AF_INET;
1277 mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
1279 hp = gethostbyname(mounthost);
1281 bb_herror_msg("%s", mounthost);
1284 if (hp->h_length > sizeof(struct in_addr)) {
1285 bb_error_msg("got bad hp->h_length?");
1286 hp->h_length = sizeof(struct in_addr);
1288 mount_server_addr.sin_family = AF_INET;
1289 memcpy(&mount_server_addr.sin_addr,
1290 hp->h_addr, hp->h_length);
1296 * The following loop implements the mount retries. When the mount
1297 * times out, and the "bg" option is set, we background ourself
1298 * and continue trying.
1300 * The case where the mount point is not present and the "bg"
1301 * option is set, is treated as a timeout. This is done to
1302 * support nested mounts.
1304 * The "retry" count specified by the user is the number of
1305 * minutes to retry before giving up.
1308 struct timeval total_timeout;
1309 struct timeval retry_timeout;
1315 retry_timeout.tv_sec = 3;
1316 retry_timeout.tv_usec = 0;
1317 total_timeout.tv_sec = 20;
1318 total_timeout.tv_usec = 0;
1319 timeout = time(NULL) + 60 * retry;
1323 /* be careful not to use too many CPU cycles */
1327 get_mountport(&pm_mnt, &mount_server_addr,
1332 nfsvers = (pm_mnt.pm_vers < 2) ? 2 : pm_mnt.pm_vers;
1334 /* contact the mount daemon via TCP */
1335 mount_server_addr.sin_port = htons(pm_mnt.pm_port);
1336 msock = RPC_ANYSOCK;
1338 switch (pm_mnt.pm_prot) {
1340 mclient = clntudp_create(&mount_server_addr,
1347 mount_server_addr.sin_port = htons(pm_mnt.pm_port);
1348 msock = RPC_ANYSOCK;
1350 mclient = clnttcp_create(&mount_server_addr,
1359 if (!daemonized && prevt == 0)
1360 error_msg_rpc(clnt_spcreateerror(" "));
1362 enum clnt_stat clnt_stat;
1363 /* try to mount hostname:pathname */
1364 mclient->cl_auth = authunix_create_default();
1366 /* make pointers in xdr_mountres3 NULL so
1367 * that xdr_array allocates memory for us
1369 memset(&status, 0, sizeof(status));
1371 if (pm_mnt.pm_vers == 3)
1372 clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
1373 (xdrproc_t) xdr_dirpath,
1374 (caddr_t) &pathname,
1375 (xdrproc_t) xdr_mountres3,
1379 clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
1380 (xdrproc_t) xdr_dirpath,
1381 (caddr_t) &pathname,
1382 (xdrproc_t) xdr_fhstatus,
1386 if (clnt_stat == RPC_SUCCESS)
1387 goto prepare_kernel_data; /* we're done */
1388 if (errno != ECONNREFUSED) {
1389 error_msg_rpc(clnt_sperror(mclient, " "));
1390 goto fail; /* don't retry */
1392 /* Connection refused */
1393 if (!daemonized && prevt == 0) /* print just once */
1394 error_msg_rpc(clnt_sperror(mclient, " "));
1395 auth_destroy(mclient->cl_auth);
1396 clnt_destroy(mclient);
1402 /* Timeout. We are going to retry... maybe */
1407 daemonized = daemonize();
1408 if (daemonized <= 0) { /* parent or error */
1409 retval = -daemonized;
1416 /* TODO error message */
1422 prepare_kernel_data:
1425 if (status.nfsv2.fhs_status != 0) {
1426 bb_error_msg("%s:%s failed, reason given by server: %s",
1428 nfs_strerror(status.nfsv2.fhs_status));
1431 memcpy(data.root.data,
1432 (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
1434 data.root.size = NFS_FHSIZE;
1435 memcpy(data.old_root.data,
1436 (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
1439 fhandle3 *my_fhandle;
1440 if (status.nfsv3.fhs_status != 0) {
1441 bb_error_msg("%s:%s failed, reason given by server: %s",
1443 nfs_strerror(status.nfsv3.fhs_status));
1446 my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
1447 memset(data.old_root.data, 0, NFS_FHSIZE);
1448 memset(&data.root, 0, sizeof(data.root));
1449 data.root.size = my_fhandle->fhandle3_len;
1450 memcpy(data.root.data,
1451 (char *) my_fhandle->fhandle3_val,
1452 my_fhandle->fhandle3_len);
1454 data.flags |= NFS_MOUNT_VER3;
1457 /* create nfs socket for kernel */
1460 if (nfs_mount_version < 3) {
1461 bb_error_msg("NFS over TCP is not supported");
1464 fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1466 fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
1468 bb_perror_msg("nfs socket");
1471 if (bindresvport(fsock, 0) < 0) {
1472 bb_perror_msg("nfs bindresvport");
1476 server_addr.sin_port = PMAPPORT;
1477 port = pmap_getport(&server_addr, nfsprog, nfsvers,
1478 tcp ? IPPROTO_TCP : IPPROTO_UDP);
1482 server_addr.sin_port = htons(port);
1484 /* prepare data structure for kernel */
1487 memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
1488 strncpy(data.hostname, hostname, sizeof(data.hostname));
1492 auth_destroy(mclient->cl_auth);
1493 clnt_destroy(mclient);
1498 /* We must wait until mount directory is available */
1499 struct stat statbuf;
1501 while (stat(mp->mnt_dir, &statbuf) == -1) {
1503 daemonized = daemonize();
1504 if (daemonized <= 0) { /* parent or error */
1505 // FIXME: parent doesn't close fsock - ??!
1506 retval = -daemonized;
1510 sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */
1517 do_mount: /* perform actual mount */
1519 mp->mnt_type = (char*)"nfs";
1520 retval = mount_it_now(mp, vfsflags, (char*)&data);
1527 auth_destroy(mclient->cl_auth);
1528 clnt_destroy(mclient);
1542 #else /* !ENABLE_FEATURE_MOUNT_NFS */
1544 /* Never called. Call should be optimized out. */
1545 int nfsmount(struct mntent *mp, long vfsflags, char *filteropts);
1547 #endif /* !ENABLE_FEATURE_MOUNT_NFS */
1549 // Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
1550 // type detection. Returns 0 for success, nonzero for failure.
1551 // NB: mp->xxx fields may be trashed on exit
1552 static int singlemount(struct mntent *mp, int ignore_busy)
1556 char *loopFile = 0, *filteropts = 0;
1560 vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
1562 // Treat fstype "auto" as unspecified.
1564 if (mp->mnt_type && strcmp(mp->mnt_type, "auto") == 0)
1565 mp->mnt_type = NULL;
1567 // Might this be a virtual filesystem?
1569 if (ENABLE_FEATURE_MOUNT_HELPERS
1570 && (strchr(mp->mnt_fsname, '#'))
1572 char *s, *p, *args[35];
1574 // FIXME: does it allow execution of arbitrary commands?!
1575 // What args[0] can end up with?
1576 for (s = p = mp->mnt_fsname; *s && n < 35-3; ++s) {
1577 if (s[0] == '#' && s[1] != '#') {
1584 args[n++] = mp->mnt_dir;
1586 rc = wait4pid(xspawn(args));
1590 // Might this be an CIFS filesystem?
1592 if (ENABLE_FEATURE_MOUNT_CIFS
1593 && (!mp->mnt_type || strcmp(mp->mnt_type, "cifs") == 0)
1594 && (mp->mnt_fsname[0] == '/' || mp->mnt_fsname[0] == '\\')
1595 && mp->mnt_fsname[0] == mp->mnt_fsname[1]
1597 len_and_sockaddr *lsa;
1602 // Replace '/' with '\' and verify that unc points to "//server/share".
1604 for (s = mp->mnt_fsname; *s; ++s)
1605 if (*s == '/') *s = '\\';
1609 s = strrchr(mp->mnt_fsname, '\\');
1610 if (s <= mp->mnt_fsname+1) goto report_error;
1612 lsa = host2sockaddr(mp->mnt_fsname+2, 0);
1614 if (!lsa) goto report_error;
1616 // insert ip=... option into string flags.
1618 dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
1619 ip = xasprintf("ip=%s", dotted);
1620 parse_mount_options(ip, &filteropts);
1622 // compose new unc '\\server-ip\share'
1623 // (s => slash after hostname)
1625 mp->mnt_fsname = xasprintf("\\\\%s%s", dotted, s);
1628 vfsflags |= MS_MANDLOCK;
1630 mp->mnt_type = (char*)"cifs";
1631 rc = mount_it_now(mp, vfsflags, filteropts);
1632 if (ENABLE_FEATURE_CLEAN_UP) {
1633 free(mp->mnt_fsname);
1641 // Might this be an NFS filesystem?
1643 if (ENABLE_FEATURE_MOUNT_NFS
1644 && (!mp->mnt_type || !strcmp(mp->mnt_type, "nfs"))
1645 && strchr(mp->mnt_fsname, ':') != NULL
1647 rc = nfsmount(mp, vfsflags, filteropts);
1651 // Look at the file. (Not found isn't a failure for remount, or for
1652 // a synthetic filesystem like proc or sysfs.)
1653 // (We use stat, not lstat, in order to allow
1654 // mount symlink_to_file_or_blkdev dir)
1656 if (!stat(mp->mnt_fsname, &st)
1657 && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))
1659 // Do we need to allocate a loopback device for it?
1661 if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
1662 loopFile = bb_simplify_path(mp->mnt_fsname);
1663 mp->mnt_fsname = NULL; /* will receive malloced loop dev name */
1664 if (set_loop(&(mp->mnt_fsname), loopFile, 0) < 0) {
1665 if (errno == EPERM || errno == EACCES)
1666 bb_error_msg(bb_msg_perm_denied_are_you_root);
1668 bb_perror_msg("cannot setup loop device");
1672 // Autodetect bind mounts
1674 } else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
1675 vfsflags |= MS_BIND;
1678 /* If we know the fstype (or don't need to), jump straight
1679 * to the actual mount. */
1681 if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
1682 rc = mount_it_now(mp, vfsflags, filteropts);
1684 // Loop through filesystem types until mount succeeds
1687 /* Initialize list of block backed filesystems. This has to be
1688 * done here so that during "mount -a", mounts after /proc shows up
1689 * can autodetect. */
1692 fslist = get_block_backed_filesystems();
1693 if (ENABLE_FEATURE_CLEAN_UP && fslist)
1694 atexit(delete_block_backed_filesystems);
1697 for (fl = fslist; fl; fl = fl->link) {
1698 mp->mnt_type = fl->data;
1699 rc = mount_it_now(mp, vfsflags, filteropts);
1704 // If mount failed, clean up loop file (if any).
1706 if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
1707 del_loop(mp->mnt_fsname);
1708 if (ENABLE_FEATURE_CLEAN_UP) {
1710 free(mp->mnt_fsname);
1715 if (ENABLE_FEATURE_CLEAN_UP)
1718 if (errno == EBUSY && ignore_busy)
1721 bb_perror_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
1725 // Parse options, if necessary parse fstab/mtab, and call singlemount for
1726 // each directory to be mounted.
1728 static const char must_be_root[] ALIGN1 = "you must be root";
1730 int mount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1731 int mount_main(int argc, char **argv)
1733 char *cmdopts = xstrdup("");
1734 char *fstype = NULL;
1735 char *storage_path = NULL;
1737 const char *fstabname;
1741 struct mntent mtpair[2], *mtcur = mtpair;
1742 SKIP_DESKTOP(const int nonroot = 0;)
1744 USE_DESKTOP( int nonroot = ) sanitize_env_if_suid();
1746 // Parse long options, like --bind and --move. Note that -o option
1747 // and --option are synonymous. Yes, this means --remount,rw works.
1749 for (i = j = 0; i < argc; i++) {
1750 if (argv[i][0] == '-' && argv[i][1] == '-') {
1751 append_mount_options(&cmdopts, argv[i]+2);
1752 } else argv[j++] = argv[i];
1757 // Parse remaining options
1759 #if ENABLE_FEATURE_MOUNT_VERBOSE
1760 opt_complementary = "vv"; // -v is a counter
1762 opt = getopt32(argv, OPTION_STR, &opt_o, &fstype
1763 USE_FEATURE_MOUNT_VERBOSE(, &verbose));
1764 if (opt & OPT_o) append_mount_options(&cmdopts, opt_o); // -o
1765 if (opt & OPT_r) append_mount_options(&cmdopts, "ro"); // -r
1766 if (opt & OPT_w) append_mount_options(&cmdopts, "rw"); // -w
1770 // Three or more non-option arguments? Die with a usage message.
1772 if (argc > 2) bb_show_usage();
1774 // If we have no arguments, show currently mounted filesystems
1777 if (!(opt & OPT_a)) {
1778 FILE *mountTable = setmntent(bb_path_mtab_file, "r");
1780 if (!mountTable) bb_error_msg_and_die("no %s", bb_path_mtab_file);
1782 while (getmntent_r(mountTable, &mtpair[0], getmntent_buf,
1785 // Don't show rootfs. FIXME: why??
1786 // util-linux 2.12a happily shows rootfs...
1787 //if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
1789 if (!fstype || !strcmp(mtpair->mnt_type, fstype))
1790 printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
1791 mtpair->mnt_dir, mtpair->mnt_type,
1794 if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable);
1795 return EXIT_SUCCESS;
1797 } else storage_path = bb_simplify_path(argv[0]);
1799 // When we have two arguments, the second is the directory and we can
1800 // skip looking at fstab entirely. We can always abspath() the directory
1801 // argument when we get it.
1805 bb_error_msg_and_die(must_be_root);
1806 mtpair->mnt_fsname = argv[0];
1807 mtpair->mnt_dir = argv[1];
1808 mtpair->mnt_type = fstype;
1809 mtpair->mnt_opts = cmdopts;
1810 if (ENABLE_FEATURE_MOUNT_LABEL) {
1811 resolve_mount_spec(&mtpair->mnt_fsname);
1813 rc = singlemount(mtpair, 0);
1817 i = parse_mount_options(cmdopts, 0); // FIXME: should be "long", not "int"
1818 if (nonroot && (i & ~MS_SILENT)) // Non-root users cannot specify flags
1819 bb_error_msg_and_die(must_be_root);
1821 // If we have a shared subtree flag, don't worry about fstab or mtab.
1823 if (ENABLE_FEATURE_MOUNT_FLAGS
1824 && (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
1826 rc = verbose_mount("", argv[0], "", i, "");
1827 if (rc) bb_simple_perror_msg_and_die(argv[0]);
1831 // Open either fstab or mtab
1833 fstabname = "/etc/fstab";
1834 if (i & MS_REMOUNT) {
1835 fstabname = bb_path_mtab_file;
1837 fstab = setmntent(fstabname, "r");
1839 bb_perror_msg_and_die("cannot read %s", fstabname);
1841 // Loop through entries until we find what we're looking for.
1843 memset(mtpair, 0, sizeof(mtpair));
1845 struct mntent *mtnext = (mtcur==mtpair ? mtpair+1 : mtpair);
1847 // Get next fstab entry
1849 if (!getmntent_r(fstab, mtcur, getmntent_buf
1850 + (mtcur==mtpair ? GETMNTENT_BUFSIZE/2 : 0),
1851 GETMNTENT_BUFSIZE/2))
1853 // Were we looking for something specific?
1857 // If we didn't find anything, complain.
1859 if (!mtnext->mnt_fsname)
1860 bb_error_msg_and_die("can't find %s in %s",
1861 argv[0], fstabname);
1865 // fstab must have "users" or "user"
1866 if (!(parse_mount_options(mtcur->mnt_opts, 0) & MOUNT_USERS))
1867 bb_error_msg_and_die(must_be_root);
1870 // Mount the last thing we found.
1872 mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
1873 append_mount_options(&(mtcur->mnt_opts), cmdopts);
1874 if (ENABLE_FEATURE_MOUNT_LABEL) {
1875 resolve_mount_spec(&mtpair->mnt_fsname);
1877 rc = singlemount(mtcur, 0);
1878 free(mtcur->mnt_opts);
1883 /* If we're trying to mount something specific and this isn't it,
1884 * skip it. Note we must match both the exact text in fstab (ala
1885 * "proc") or a full path from root */
1889 // Is this what we're looking for?
1891 if (strcmp(argv[0], mtcur->mnt_fsname) &&
1892 strcmp(storage_path, mtcur->mnt_fsname) &&
1893 strcmp(argv[0], mtcur->mnt_dir) &&
1894 strcmp(storage_path, mtcur->mnt_dir)) continue;
1896 // Remember this entry. Something later may have overmounted
1897 // it, and we want the _last_ match.
1901 // If we're mounting all.
1904 // Do we need to match a filesystem type?
1905 if (fstype && match_fstype(mtcur, fstype))
1908 // Skip noauto and swap anyway.
1910 if (parse_mount_options(mtcur->mnt_opts, 0) & (MOUNT_NOAUTO | MOUNT_SWAP))
1913 // No, mount -a won't mount anything,
1914 // even user mounts, for mere humans.
1917 bb_error_msg_and_die(must_be_root);
1919 // Mount this thing.
1920 if (ENABLE_FEATURE_MOUNT_LABEL)
1921 resolve_mount_spec(&mtpair->mnt_fsname);
1923 // NFS mounts want this to be xrealloc-able
1924 mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
1925 if (singlemount(mtcur, 1)) {
1926 /* Count number of failed mounts */
1929 free(mtcur->mnt_opts);
1932 if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab);
1936 if (ENABLE_FEATURE_CLEAN_UP) {