mirror of
https://github.com/sheumann/hush.git
synced 2024-09-28 13:54:53 +00:00
The new, new mount rewrite. (Mount double prime?) Still being debugged, but
the new infrastructure is reentrant so in theory it's capable of handling mount -a sanely. It can also re-use existing flags with remount, handle -t auto, mount -a -t, and several smaller bugfixes.
This commit is contained in:
Rob Landley
parent
0b22c1c962
commit
dc0955b603
@ -4,11 +4,24 @@
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*
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* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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* Copyright (C) 2005 by Rob Landley <rob@landley.net>
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* Copyright (C) 2005-2006 by Rob Landley <rob@landley.net>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* todo:
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* bb_getopt_ulflags();
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*/
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/* Design notes: There is no spec for this. Remind me to write one.
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mount_main() calls singlemount() which calls mount_it_now().
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mount_main() can loop through /etc/fstab for mount -a
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singlemount() can loop through /etc/filesystems for fstype detection.
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mount_it_now() does the actual mount.
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*/
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#include <limits.h>
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#include <stdlib.h>
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#include <unistd.h>
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@ -29,18 +42,28 @@
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#ifndef MS_MOVE
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#define MS_MOVE 8192
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#endif
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#ifndef MS_SILENT
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#define MS_SILENT 32768
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#endif
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/* Consume standard mount options (from -o options or --options).
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* Set appropriate flags and collect unrecognized ones as a comma separated
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* string to pass to kernel */
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// Not real flags, but we want to be able to check for this.
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#define MOUNT_NOAUTO (1<<29)
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#define MOUNT_SWAP (1<<30)
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/* Standard mount options (from -o options or --options), with corresponding
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* flags */
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struct {
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const char *name;
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long flags;
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} static const mount_options[] = {
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} static const mount_options[] = {
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// NOP flags.
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{"loop", 0},
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{"defaults", 0},
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{"noauto", 0},
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{"quiet", 0},
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// vfs flags
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{"ro", MS_RDONLY},
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{"rw", ~MS_RDONLY},
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{"nosuid", MS_NOSUID},
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@ -51,336 +74,469 @@ struct {
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{"noexec", MS_NOEXEC},
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{"sync", MS_SYNCHRONOUS},
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{"async", ~MS_SYNCHRONOUS},
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{"remount", MS_REMOUNT},
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{"atime", ~MS_NOATIME},
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{"noatime", MS_NOATIME},
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{"diratime", ~MS_NODIRATIME},
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{"nodiratime", MS_NODIRATIME},
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{"loud", ~MS_SILENT},
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// action flags
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{"remount", MS_REMOUNT},
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{"bind", MS_BIND},
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{"move", MS_MOVE}
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{"move", MS_MOVE},
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{"noauto",MOUNT_NOAUTO},
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{"swap",MOUNT_SWAP}
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};
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/* Uses the mount_options list above */
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static void parse_mount_options(char *options, int *flags, char **strflags)
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/* Append mount options to string */
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static void append_mount_options(char **oldopts, char *newopts)
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{
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if(*oldopts && **oldopts) {
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char *temp=bb_xasprintf("%s,%s",*oldopts,newopts);
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free(*oldopts);
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*oldopts=temp;
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} else {
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if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
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*oldopts = bb_xstrdup(newopts);
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}
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}
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/* Use the mount_options list to parse options into flags.
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* Return list of unrecognized options in *strflags if strflags!=NULL */
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static int parse_mount_options(char *options, char **unrecognized)
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{
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int flags = MS_SILENT;
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// Loop through options
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for(;;) {
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for (;;) {
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int i;
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char *comma = strchr(options, ',');
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if(comma) *comma = 0;
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if (comma) *comma = 0;
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// Find this option in mount_options
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for(i = 0; i < (sizeof(mount_options) / sizeof(*mount_options)); i++) {
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if(!strcasecmp(mount_options[i].name, options)) {
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for (i = 0; i < (sizeof(mount_options) / sizeof(*mount_options)); i++) {
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if (!strcasecmp(mount_options[i].name, options)) {
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long fl = mount_options[i].flags;
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if(fl < 0) *flags &= fl;
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else *flags |= fl;
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if(fl < 0) flags &= fl;
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else flags |= fl;
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break;
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}
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}
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// Unrecognized mount option?
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if(i == (sizeof(mount_options) / sizeof(*mount_options))) {
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// If unrecognized not NULL, append unrecognized mount options */
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if (unrecognized
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&& i == (sizeof(mount_options) / sizeof(*mount_options)))
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{
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// Add it to strflags, to pass on to kernel
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i = *strflags ? strlen(*strflags) : 0;
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*strflags = xrealloc(*strflags, i+strlen(options)+2);
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i = *unrecognized ? strlen(*unrecognized) : 0;
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*unrecognized = xrealloc(*unrecognized, i+strlen(options)+2);
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// Comma separated if it's not the first one
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if(i) (*strflags)[i++] = ',';
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strcpy((*strflags)+i, options);
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if (i) (*unrecognized)[i++] = ',';
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strcpy((*unrecognized)+i, options);
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}
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// Advance to next option, or finish
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if(comma) {
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*comma = ',';
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options = ++comma;
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} else break;
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}
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return flags;
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}
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/* This does the work */
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// Return a list of all block device backed filesystems
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extern int mount_main(int argc, char **argv)
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static llist_t *get_block_backed_filesystems(void)
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{
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char *string_flags = 0, *fsType = 0, *blockDevice = 0, *directory = 0,
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*loopFile = 0, *buf = 0,
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*files[] = {"/etc/filesystems", "/proc/filesystems", 0};
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int i, opt, all = FALSE, fakeIt = FALSE, allowWrite = FALSE,
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rc = 1, useMtab = ENABLE_FEATURE_MTAB_SUPPORT;
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int flags=0xc0ed0000; // Needed for linux 2.2, ignored by 2.4 and 2.6.
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FILE *file = 0,*f = 0;
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char path[PATH_MAX*2];
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struct mntent m;
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struct stat statbuf;
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char *fs, *buf,
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*filesystems[] = {"/etc/filesystems", "/proc/filesystems", 0};
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llist_t *list = 0;
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int i;
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FILE *f;
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for(i = 0; filesystems[i]; i++) {
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if(!(f = fopen(filesystems[i], "r"))) continue;
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for(fs = buf = 0; (fs = buf = bb_get_chomped_line_from_file(f));
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free(buf))
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{
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if(!strncmp(buf,"nodev",5) && isspace(buf[5])) continue;
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while(isspace(*fs)) fs++;
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if(*fs=='#' || *fs=='*') continue;
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if(!*fs) continue;
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list=llist_add_to_end(list,bb_xstrdup(fs));
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}
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if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
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}
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return list;
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}
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llist_t *fslist = 0;
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void delete_block_backed_filesystems(void);
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#if ENABLE_FEATURE_CLEAN_UP
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static void delete_block_backed_filesystems(void)
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{
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llist_free(fslist);
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}
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#endif
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#if ENABLE_FEATURE_MTAB_SUPPORT
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static int useMtab;
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#else
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#define useMtab 0
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#endif
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// Perform actual mount of specific filesystem at specific location.
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static int mount_it_now(struct mntent *mp, int vfsflags)
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{
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int rc;
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char *filteropts = 0;
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parse_mount_options(mp->mnt_opts, &filteropts);
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// Mount, with fallback to read-only if necessary.
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for(;;) {
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rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
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vfsflags, filteropts);
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if(!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
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break;
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bb_error_msg("%s is write-protected, mounting read-only",
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mp->mnt_fsname);
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vfsflags |= MS_RDONLY;
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}
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free(filteropts);
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// Abort entirely if permission denied.
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if (rc && errno == EPERM)
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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/* If the mount was successful, and we're maintaining an old-style
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* mtab file by hand, add the new entry to it now. */
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if(ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc) {
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FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
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int i;
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if(!mountTable)
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bb_error_msg("No %s\n",bb_path_mtab_file);
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// Add vfs string flags
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for(i=0; mount_options[i].flags != MS_REMOUNT; i++)
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if (mount_options[i].flags > 0)
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append_mount_options(&(mp->mnt_opts),
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// Shut up about the darn const. It's not important. I don't care.
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(char *)mount_options[i].name);
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// Remove trailing / (if any) from directory we mounted on
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i = strlen(mp->mnt_dir);
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if(i>1 && mp->mnt_dir[i-1] == '/') mp->mnt_dir[i-1] = 0;
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// Write and close.
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if(!mp->mnt_type || !*mp->mnt_type) mp->mnt_type="--bind";
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addmntent(mountTable, mp);
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endmntent(mountTable);
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if (ENABLE_FEATURE_CLEAN_UP)
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if(strcmp(mp->mnt_type,"--bind")) mp->mnt_type = 0;
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}
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return rc;
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}
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// Mount one directory. Handles NFS, loopback, autobind, and filesystem type
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// detection. Returns 0 for success, nonzero for failure.
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static int singlemount(struct mntent *mp)
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{
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int rc = 0, vfsflags;
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char *loopFile = 0;
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llist_t *fl = 0;
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struct stat st;
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vfsflags = parse_mount_options(mp->mnt_opts, 0);
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// Might this be an NFS filesystem?
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if (ENABLE_FEATURE_MOUNT_NFS &&
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(!mp->mnt_type || !strcmp(mp->mnt_type,"nfs")) &&
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strchr(mp->mnt_fsname, ':') != NULL)
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{
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char *options=0;
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parse_mount_options(mp->mnt_opts, &options);
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if (nfsmount(mp->mnt_fsname, mp->mnt_dir, &vfsflags, &options, 1)) {
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bb_perror_msg("nfsmount failed");
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return 1;
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}
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// Strangely enough, nfsmount() doesn't actually mount() anything.
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else return mount_it_now(mp, vfsflags);
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}
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// Look at the file. (Not found isn't a failure for remount.)
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if (lstat(mp->mnt_fsname, &st));
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if (!(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))) {
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// Do we need to allocate a loopback device for it?
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if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
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loopFile = mp->mnt_fsname;
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mp->mnt_fsname = 0;
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switch(set_loop(&(mp->mnt_fsname), loopFile, 0)) {
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case 0:
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case 1:
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break;
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default:
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bb_error_msg( errno == EPERM || errno == EACCES
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? bb_msg_perm_denied_are_you_root
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: "Couldn't setup loop device");
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return errno;
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}
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// Autodetect bind mounts
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} else if (S_ISDIR(st.st_mode) && !mp->mnt_type) vfsflags |= MS_BIND;
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}
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/* If we know the fstype (or don't need to), jump straight
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* to the actual mount. */
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if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
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rc = mount_it_now(mp, vfsflags);
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// Loop through filesystem types until mount succeeds or we run out
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else for (fl = fslist; fl; fl = fl->link) {
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mp->mnt_type = fl->data;
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if (!(rc = mount_it_now(mp,vfsflags))) break;
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mp->mnt_type = 0;
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}
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// Mount failed. Clean up
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if (rc && loopFile) {
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del_loop(mp->mnt_fsname);
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if(ENABLE_FEATURE_CLEAN_UP) free(loopFile);
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}
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return rc;
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}
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// Parse options, if necessary parse fstab/mtab, and call singlemount for
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// each directory to be mounted.
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int mount_main(int argc, char **argv)
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{
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char *cmdopts = bb_xstrdup(""), *fstabname, *fstype=0, *storage_path=0;
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FILE *fstab;
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int i, opt, all = FALSE, rc = 1;
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struct mntent mtpair[2], *mtcur = mtpair;
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/* parse long options, like --bind and --move. Note that -o option
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* and --option are synonymous. Yes, this means --remount,rw works. */
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for(i = opt = 0; i < argc; i++) {
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if(argv[i][0] == '-' && argv[i][1] == '-')
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parse_mount_options(argv[i]+2, &flags, &string_flags);
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else argv[opt++] = argv[i];
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for (i = opt = 0; i < argc; i++) {
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if (argv[i][0] == '-' && argv[i][1] == '-') {
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append_mount_options(&cmdopts,argv[i]+2);
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} else argv[opt++] = argv[i];
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}
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argc = opt;
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// Parse remaining options
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while((opt = getopt(argc, argv, "o:t:rwafnv")) > 0) {
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while ((opt = getopt(argc, argv, "o:t:rwavnf")) > 0) {
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switch (opt) {
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case 'o':
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parse_mount_options(optarg, &flags, &string_flags);
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break;
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case 't':
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fsType = optarg;
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break;
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case 'r':
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flags |= MS_RDONLY;
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break;
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case 'w':
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allowWrite=TRUE;
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break;
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case 'a':
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all = TRUE;
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break;
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case 'f':
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fakeIt = TRUE;
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break;
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case 'n':
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useMtab = FALSE;
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break;
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case 'v':
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break; // ignore -v
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default:
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bb_show_usage();
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case 'o':
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append_mount_options(&cmdopts, optarg);
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break;
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case 't':
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fstype = optarg;
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break;
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case 'r':
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append_mount_options(&cmdopts, "ro");
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break;
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case 'w':
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append_mount_options(&cmdopts, "rw");
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break;
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case 'a':
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all = TRUE;
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break;
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case 'n':
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USE_FEATURE_MTAB_SUPPORT(useMtab = FALSE;)
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break;
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case 'f':
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USE_FEATURE_MTAB_SUPPORT(fakeIt = FALSE;)
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break;
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case 'v':
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break; // ignore -v
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default:
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bb_show_usage();
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}
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}
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// Ignore type "auto".
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if (fstype && !strcmp(fstype, "auto")) fstype = NULL;
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// Three or more non-option arguments? Die with a usage message.
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if (optind-argc>2) bb_show_usage();
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// If we have no arguments, show currently mounted filesystems
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if(!all && (optind == argc)) {
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FILE *mountTable = setmntent(bb_path_mtab_file, "r");
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if (optind == argc) {
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if (!all) {
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FILE *mountTable = setmntent(bb_path_mtab_file, "r");
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if(!mountTable) bb_perror_msg_and_die(bb_path_mtab_file);
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if(!mountTable) bb_error_msg_and_die("No %s",bb_path_mtab_file);
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while (getmntent_r(mountTable,&m,path,sizeof(path))) {
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blockDevice = m.mnt_fsname;
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while (getmntent_r(mountTable,mtpair,bb_common_bufsiz1,
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sizeof(bb_common_bufsiz1)))
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{
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// Don't show rootfs.
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if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
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// Clean up display a little bit regarding root device
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if(!strcmp(blockDevice, "rootfs")) continue;
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if(!strcmp(blockDevice, "/dev/root"))
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blockDevice = find_block_device("/");
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if(!fsType || !strcmp(m.mnt_type, fsType))
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printf("%s on %s type %s (%s)\n", blockDevice, m.mnt_dir,
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m.mnt_type, m.mnt_opts);
|
||||
if(ENABLE_FEATURE_CLEAN_UP && blockDevice != m.mnt_fsname)
|
||||
free(blockDevice);
|
||||
if (!fstype || !strcmp(mtpair->mnt_type, fstype))
|
||||
printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
|
||||
mtpair->mnt_dir, mtpair->mnt_type,
|
||||
mtpair->mnt_opts);
|
||||
}
|
||||
if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable);
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
endmntent(mountTable);
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
/* The next argument is what to mount. if there's an argument after that
|
||||
* it's where to mount it. If we're not mounting all, and we have both
|
||||
* of these arguments, jump straight to the actual mount. */
|
||||
/* Initialize list of block backed filesystems */
|
||||
|
||||
statbuf.st_mode=0;
|
||||
if(optind < argc)
|
||||
blockDevice = !stat(argv[optind], &statbuf) ?
|
||||
bb_simplify_path(argv[optind]) :
|
||||
(ENABLE_FEATURE_CLEAN_UP ? strdup(argv[optind]) : argv[optind]);
|
||||
if(optind+1 < argc) directory = bb_simplify_path(argv[optind+1]);
|
||||
fslist = get_block_backed_filesystems();
|
||||
if (ENABLE_FEATURE_CLEAN_UP) atexit(delete_block_backed_filesystems);
|
||||
|
||||
// When we have two arguments, the second is the directory and we can
|
||||
// skip looking at fstab entirely. We can always abspath() the directory
|
||||
// argument when we get it.
|
||||
|
||||
// If we don't have to loop through fstab, skip ahead a bit.
|
||||
if (optind+2 == argc) {
|
||||
mtpair->mnt_fsname = argv[optind];
|
||||
mtpair->mnt_dir = argv[optind+1];
|
||||
mtpair->mnt_type = fstype;
|
||||
mtpair->mnt_opts = cmdopts;
|
||||
rc = singlemount(mtpair);
|
||||
goto clean_up;
|
||||
}
|
||||
|
||||
if(!all && optind+1!=argc) goto singlemount;
|
||||
// If we have at least one argument, it's the storage location
|
||||
|
||||
if (optind < argc) storage_path = bb_simplify_path(argv[optind]);
|
||||
|
||||
// Open either fstab or mtab
|
||||
|
||||
// Loop through /etc/fstab entries to look up this entry.
|
||||
if (parse_mount_options(cmdopts,0) & MS_REMOUNT)
|
||||
fstabname = (char *)bb_path_mtab_file; // Again with the evil const.
|
||||
else fstabname="/etc/fstab";
|
||||
|
||||
if (!(fstab=setmntent(fstabname,"r")))
|
||||
bb_perror_msg_and_die("Cannot read %s",fstabname);
|
||||
|
||||
// Loop through entries until we find what we're looking for.
|
||||
|
||||
if(!(file=setmntent("/etc/fstab","r")))
|
||||
bb_perror_msg_and_die("\nCannot read /etc/fstab");
|
||||
for(;;) {
|
||||
memset(mtpair,0,sizeof(mtpair));
|
||||
for (;;) {
|
||||
struct mntent *mtnext = mtpair + (mtcur==mtpair ? 1 : 0);
|
||||
|
||||
// Get next fstab entry
|
||||
|
||||
if(!getmntent_r(file,&m,path,sizeof(path))) {
|
||||
if(!all)
|
||||
bb_perror_msg("Can't find %s in /etc/fstab\n", blockDevice);
|
||||
if (!getmntent_r(fstab, mtcur, bb_common_bufsiz1,
|
||||
sizeof(bb_common_bufsiz1)))
|
||||
{
|
||||
// Were we looking for something specific?
|
||||
|
||||
if (optind != argc) {
|
||||
|
||||
// If we didn't find anything, complain.
|
||||
|
||||
if (!mtnext->mnt_fsname)
|
||||
bb_error_msg_and_die("Can't find %s in %s",
|
||||
argv[optind], fstabname);
|
||||
|
||||
// Mount the last thing we found.
|
||||
|
||||
mtcur = mtnext;
|
||||
mtcur->mnt_opts=bb_xstrdup(mtcur->mnt_opts);
|
||||
append_mount_options(&(mtcur->mnt_opts),cmdopts);
|
||||
rc = singlemount(mtcur);
|
||||
free(mtcur->mnt_opts);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
/* If we're trying to mount something specific and this isn't it,
|
||||
* skip it. Note we must match both the exact text in fstab (ala
|
||||
* "proc") or a full path from root */
|
||||
|
||||
// If we're mounting all and all doesn't mount this one, skip it.
|
||||
if (optind != argc) {
|
||||
|
||||
if(all) {
|
||||
if(strstr(m.mnt_opts,"noauto") || strstr(m.mnt_type,"swap"))
|
||||
continue;
|
||||
flags=0;
|
||||
// Is this what we're looking for?
|
||||
|
||||
/* If we're mounting something specific and this isn't it, skip it.
|
||||
* Note we must match both the exact text in fstab (ala "proc") or
|
||||
* a full path from root */
|
||||
if(strcmp(argv[optind],mtcur->mnt_fsname) &&
|
||||
strcmp(storage_path,mtcur->mnt_fsname) &&
|
||||
strcmp(argv[optind],mtcur->mnt_dir) &&
|
||||
strcmp(storage_path,mtcur->mnt_dir)) continue;
|
||||
|
||||
} else if(strcmp(blockDevice,m.mnt_fsname) &&
|
||||
strcmp(argv[optind],m.mnt_fsname) &&
|
||||
strcmp(blockDevice,m.mnt_dir) &&
|
||||
strcmp(argv[optind],m.mnt_dir)) continue;
|
||||
// Remember this entry. Something later may have overmounted
|
||||
// it, and we want the _last_ match.
|
||||
|
||||
/* Parse flags from /etc/fstab (unless this is a single mount
|
||||
* overriding fstab -- note the "all" test above zeroed the flags,
|
||||
* to prevent flags from previous entries affecting this one, so
|
||||
* the only way we could get here with nonzero flags is a single
|
||||
* mount). */
|
||||
mtcur = mtnext;
|
||||
|
||||
// If we're mounting all.
|
||||
|
||||
if(!flags) {
|
||||
if(ENABLE_FEATURE_CLEAN_UP) free(string_flags);
|
||||
string_flags=NULL;
|
||||
parse_mount_options(m.mnt_opts, &flags, &string_flags);
|
||||
}
|
||||
|
||||
/* Fill out remaining fields with info from mtab */
|
||||
|
||||
if(ENABLE_FEATURE_CLEAN_UP) {
|
||||
free(blockDevice);
|
||||
blockDevice=strdup(m.mnt_fsname);
|
||||
free(directory);
|
||||
directory=strdup(m.mnt_dir);
|
||||
} else {
|
||||
blockDevice=m.mnt_fsname;
|
||||
directory=m.mnt_dir;
|
||||
|
||||
// Do we need to match a filesystem type?
|
||||
if (fstype && strcmp(mtcur->mnt_type,fstype)) continue;
|
||||
|
||||
// Skip noauto and swap anyway.
|
||||
|
||||
if (parse_mount_options(mtcur->mnt_opts,0)
|
||||
& (MOUNT_NOAUTO | MOUNT_SWAP)) continue;
|
||||
|
||||
// Mount this thing.
|
||||
|
||||
rc = singlemount(mtcur);
|
||||
if (rc) {
|
||||
// Don't whine about already mounted fs when mounting all.
|
||||
if (errno == EBUSY) rc = 0;
|
||||
else break;
|
||||
}
|
||||
}
|
||||
fsType=m.mnt_type;
|
||||
|
||||
/* Ok, we're ready to actually mount a specific source on a specific
|
||||
* directory now. */
|
||||
|
||||
singlemount:
|
||||
|
||||
// If they said -w, override fstab
|
||||
|
||||
if(allowWrite) flags&=~MS_RDONLY;
|
||||
|
||||
// Might this be an NFS filesystem?
|
||||
|
||||
if(ENABLE_FEATURE_MOUNT_NFS && (!fsType || !strcmp(fsType,"nfs")) &&
|
||||
strchr(blockDevice, ':') != NULL)
|
||||
{
|
||||
if(nfsmount(blockDevice, directory, &flags, &string_flags, 1))
|
||||
bb_perror_msg("nfsmount failed");
|
||||
else {
|
||||
rc = 0;
|
||||
fsType="nfs";
|
||||
// Strangely enough, nfsmount() doesn't actually mount()
|
||||
goto mount_it_now;
|
||||
}
|
||||
} else {
|
||||
|
||||
// Do we need to allocate a loopback device?
|
||||
|
||||
if(ENABLE_FEATURE_MOUNT_LOOP && !fakeIt && S_ISREG(statbuf.st_mode))
|
||||
{
|
||||
loopFile = blockDevice;
|
||||
blockDevice = 0;
|
||||
switch(set_loop(&blockDevice, loopFile, 0)) {
|
||||
case 0:
|
||||
case 1:
|
||||
break;
|
||||
default:
|
||||
bb_error_msg_and_die(
|
||||
errno == EPERM || errno == EACCES ?
|
||||
bb_msg_perm_denied_are_you_root :
|
||||
"Couldn't setup loop device");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* If we know the fstype (or don't need to), jump straight
|
||||
* to the actual mount. */
|
||||
|
||||
if(fsType || (flags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
|
||||
goto mount_it_now;
|
||||
}
|
||||
|
||||
// Loop through filesystem types until mount succeeds or we run out
|
||||
|
||||
for(i = 0; files[i] && rc; i++) {
|
||||
f = fopen(files[i], "r");
|
||||
if(!f) continue;
|
||||
// Get next block device backed filesystem
|
||||
for(buf = 0; (buf = fsType = bb_get_chomped_line_from_file(f));
|
||||
free(buf))
|
||||
{
|
||||
// Skip funky entries in /proc
|
||||
if(!strncmp(buf,"nodev",5) && isspace(buf[5])) continue;
|
||||
|
||||
while(isspace(*fsType)) fsType++;
|
||||
if(*buf=='#' || *buf=='*') continue;
|
||||
if(!*fsType) continue;
|
||||
mount_it_now:
|
||||
// Okay, try to mount
|
||||
|
||||
if (!fakeIt) {
|
||||
for(;;) {
|
||||
rc = mount(blockDevice, directory, fsType, flags, string_flags);
|
||||
if(!rc || (flags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
|
||||
break;
|
||||
bb_error_msg("%s is write-protected, mounting read-only", blockDevice);
|
||||
flags|=MS_RDONLY;
|
||||
}
|
||||
}
|
||||
if(!rc || !f) break;
|
||||
}
|
||||
if(!f) break;
|
||||
fclose(f);
|
||||
// goto mount_it_now with -a can jump past the initialization
|
||||
f=0;
|
||||
if(!rc) break;
|
||||
}
|
||||
|
||||
/* If the mount was successful, and we're maintaining an old-style
|
||||
* mtab file by hand, add new entry to it now. */
|
||||
if((!rc || fakeIt) && useMtab) {
|
||||
FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
|
||||
|
||||
if(!mountTable) bb_perror_msg(bb_path_mtab_file);
|
||||
else {
|
||||
// Remove trailing / (if any) from directory we mounted on
|
||||
int length=strlen(directory);
|
||||
if(length>1 && directory[length-1] == '/')
|
||||
directory[length-1]=0;
|
||||
|
||||
// Fill out structure (should be ok to re-use existing one).
|
||||
m.mnt_fsname=blockDevice;
|
||||
m.mnt_dir=directory;
|
||||
m.mnt_type=fsType ? : "--bind";
|
||||
m.mnt_opts=string_flags ? :
|
||||
((flags & MS_RDONLY) ? "ro" : "rw");
|
||||
m.mnt_freq = 0;
|
||||
m.mnt_passno = 0;
|
||||
|
||||
// Write and close
|
||||
addmntent(mountTable, &m);
|
||||
endmntent(mountTable);
|
||||
}
|
||||
} else {
|
||||
// Mount failed. Clean up
|
||||
if(loopFile) {
|
||||
del_loop(blockDevice);
|
||||
if(ENABLE_FEATURE_CLEAN_UP) free(loopFile);
|
||||
}
|
||||
// Don't whine about already mounted fs when mounting all.
|
||||
if(rc<0 && errno == EBUSY && all) rc = 0;
|
||||
else if (errno == EPERM)
|
||||
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
|
||||
}
|
||||
// We couldn't free this earlier becase fsType could be in buf.
|
||||
if(ENABLE_FEATURE_CLEAN_UP) free(buf);
|
||||
if(!all) break;
|
||||
}
|
||||
if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab);
|
||||
|
||||
if(file) endmntent(file);
|
||||
if(rc) bb_perror_msg("Mounting %s on %s failed", blockDevice, directory);
|
||||
if(ENABLE_FEATURE_CLEAN_UP) {
|
||||
free(blockDevice);
|
||||
free(directory);
|
||||
clean_up:
|
||||
|
||||
if (ENABLE_FEATURE_CLEAN_UP) {
|
||||
free(storage_path);
|
||||
free(cmdopts);
|
||||
free(fstype);
|
||||
}
|
||||
|
||||
if(rc)
|
||||
bb_perror_msg("Mounting %s on %s failed",
|
||||
mtcur->mnt_fsname, mtcur->mnt_dir);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user