*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
- * Copyright (C) 2005 by Rob Landley <rob@landley.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Copyright (C) 2005-2006 by Rob Landley <rob@landley.net>
*
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include <limits.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <stdio.h>
-#include <mntent.h>
-#include <ctype.h>
-#include <sys/mount.h>
-#include <fcntl.h> // for CONFIG_FEATURE_MOUNT_LOOP
-#include <sys/ioctl.h> // for CONFIG_FEATURE_MOUNT_LOOP
-#include "busybox.h"
+/* todo:
+ * bb_getopt_ulflags();
+ */
-/* This is just a warning of a common mistake. Possibly this should be a
- * uclibc faq entry rather than in busybox... */
-#if ENABLE_NFSMOUNT && defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
-#error "You need to build uClibc with UCLIBC_HAS_RPC for busybox mount with NFS support to compile."
-#endif
+/* Design notes: There is no spec for mount. Remind me to write one.
+
+ mount_main() calls singlemount() which calls mount_it_now().
+
+ mount_main() can loop through /etc/fstab for mount -a
+ singlemount() can loop through /etc/filesystems for fstype detection.
+ mount_it_now() does the actual mount.
+*/
+
+#include "busybox.h"
+#include <mntent.h>
// These two aren't always defined in old headers
#ifndef MS_BIND
#ifndef MS_MOVE
#define MS_MOVE 8192
#endif
+#ifndef MS_SILENT
+#define MS_SILENT 32768
+#endif
-/* Consume standard mount options (from -o options or --options).
- * Set appropriate flags and collect unrecognized ones as a comma separated
- * string to pass to kernel */
+// Not real flags, but we want to be able to check for this.
+#define MOUNT_NOAUTO (1<<29)
+#define MOUNT_SWAP (1<<30)
+/* Standard mount options (from -o options or --options), with corresponding
+ * flags */
struct {
const char *name;
long flags;
-} static const mount_options[] = {
+} static const mount_options[] = {
+ // NOP flags.
+
{"loop", 0},
{"defaults", 0},
- {"noauto", 0},
+ {"quiet", 0},
+
+ // vfs flags
+
{"ro", MS_RDONLY},
{"rw", ~MS_RDONLY},
{"nosuid", MS_NOSUID},
{"noexec", MS_NOEXEC},
{"sync", MS_SYNCHRONOUS},
{"async", ~MS_SYNCHRONOUS},
- {"remount", MS_REMOUNT},
- {"atime", MS_NOATIME},
+ {"atime", ~MS_NOATIME},
{"noatime", MS_NOATIME},
- {"diratime", MS_NODIRATIME},
+ {"diratime", ~MS_NODIRATIME},
{"nodiratime", MS_NODIRATIME},
+ {"loud", ~MS_SILENT},
+
+ // action flags
+
+ {"remount", MS_REMOUNT},
{"bind", MS_BIND},
- {"move", MS_MOVE}
+ {"move", MS_MOVE},
+ {"noauto",MOUNT_NOAUTO},
+ {"swap",MOUNT_SWAP}
};
-/* Uses the mount_options list above */
-static void parse_mount_options(char *options, int *flags, char **strflags)
+/* Append mount options to string */
+static void append_mount_options(char **oldopts, char *newopts)
{
+ if(*oldopts && **oldopts) {
+ char *temp=xasprintf("%s,%s",*oldopts,newopts);
+ free(*oldopts);
+ *oldopts=temp;
+ } else {
+ if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
+ *oldopts = xstrdup(newopts);
+ }
+}
+
+/* Use the mount_options list to parse options into flags.
+ * Return list of unrecognized options in *strflags if strflags!=NULL */
+static int parse_mount_options(char *options, char **unrecognized)
+{
+ int flags = MS_SILENT;
+
// Loop through options
- for(;;) {
+ for (;;) {
int i;
char *comma = strchr(options, ',');
- if(comma) *comma = 0;
+ if (comma) *comma = 0;
// Find this option in mount_options
- for(i = 0; i < (sizeof(mount_options) / sizeof(*mount_options)); i++) {
- if(!strcasecmp(mount_options[i].name, options)) {
+ for (i = 0; i < (sizeof(mount_options) / sizeof(*mount_options)); i++) {
+ if (!strcasecmp(mount_options[i].name, options)) {
long fl = mount_options[i].flags;
- if(fl < 0) *flags &= fl;
- else *flags |= fl;
+ if(fl < 0) flags &= fl;
+ else flags |= fl;
break;
}
}
- // Unrecognized mount option?
- if(i == sizeof(mount_options)) {
+ // If unrecognized not NULL, append unrecognized mount options */
+ if (unrecognized
+ && i == (sizeof(mount_options) / sizeof(*mount_options)))
+ {
// Add it to strflags, to pass on to kernel
- i = *strflags ? strlen(*strflags) : 0;
- *strflags = xrealloc(*strflags, i+strlen(options)+2);
+ i = *unrecognized ? strlen(*unrecognized) : 0;
+ *unrecognized = xrealloc(*unrecognized, i+strlen(options)+2);
+
// Comma separated if it's not the first one
- if(i) (*strflags)[i] = ',';
- strcpy((*strflags)+i, options);
+ if (i) (*unrecognized)[i++] = ',';
+ strcpy((*unrecognized)+i, options);
}
+
// Advance to next option, or finish
if(comma) {
*comma = ',';
options = ++comma;
} else break;
}
+
+ return flags;
}
-/* This does the work */
+// Return a list of all block device backed filesystems
-extern int mount_main(int argc, char **argv)
+static llist_t *get_block_backed_filesystems(void)
{
- char *string_flags = 0, *fsType = 0, *blockDevice = 0, *directory = 0,
- *loopFile = 0, *buf = 0,
- *files[] = {"/etc/filesystems", "/proc/filesystems", 0};
- int i, opt, all = FALSE, fakeIt = FALSE, allowWrite = FALSE,
- rc = EXIT_FAILURE, useMtab = ENABLE_FEATURE_MTAB_SUPPORT;
- int flags=0xc0ed0000; // Needed for linux 2.2, ignored by 2.4 and 2.6.
- FILE *file = 0,*f = 0;
- char path[PATH_MAX*2];
- struct mntent m;
- struct stat statbuf;
+ char *fs, *buf,
+ *filesystems[] = {"/etc/filesystems", "/proc/filesystems", 0};
+ llist_t *list = 0;
+ int i;
+ FILE *f;
- /* parse long options, like --bind and --move. Note that -o option
- * and --option are synonymous. Yes, this means --remount,rw works. */
+ for(i = 0; filesystems[i]; i++) {
+ if(!(f = fopen(filesystems[i], "r"))) continue;
+
+ for(fs = buf = 0; (fs = buf = bb_get_chomped_line_from_file(f));
+ free(buf))
+ {
+ if(!strncmp(buf,"nodev",5) && isspace(buf[5])) continue;
+
+ while(isspace(*fs)) fs++;
+ if(*fs=='#' || *fs=='*') continue;
+ if(!*fs) continue;
- for(i = opt = 0; i < argc; i++) {
- if(argv[i][0] == '-' && argv[i][1] == '-')
- parse_mount_options(argv[i]+2, &flags, &string_flags);
- else argv[opt++] = argv[i];
+ llist_add_to_end(&list,xstrdup(fs));
+ }
+ if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
}
- argc = opt;
- // Parse remaining options
+ return list;
+}
- while((opt = getopt(argc, argv, "o:t:rwafnv")) > 0) {
- switch (opt) {
- case 'o':
- parse_mount_options(optarg, &flags, &string_flags);
- break;
- case 't':
- fsType = optarg;
- break;
- case 'r':
- flags |= MS_RDONLY;
- break;
- case 'w':
- allowWrite=TRUE;
- break;
- case 'a':
- all = TRUE;
- break;
- case 'f':
- fakeIt = TRUE;
- break;
- case 'n':
- useMtab = FALSE;
+llist_t *fslist = 0;
+
+#if ENABLE_FEATURE_CLEAN_UP
+static void delete_block_backed_filesystems(void)
+{
+ llist_free(fslist, free);
+}
+#else
+void delete_block_backed_filesystems(void);
+#endif
+
+#if ENABLE_FEATURE_MTAB_SUPPORT
+static int useMtab;
+static int fakeIt;
+#else
+#define useMtab 0
+#define fakeIt 0
+#endif
+
+// Perform actual mount of specific filesystem at specific location.
+
+static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
+{
+ int rc;
+
+ if (fakeIt) { return 0; }
+
+ // Mount, with fallback to read-only if necessary.
+
+ for(;;) {
+ rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
+ vfsflags, filteropts);
+ if(!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
break;
- case 'v':
- break; // ignore -v
- default:
- bb_show_usage();
- }
+ bb_error_msg("%s is write-protected, mounting read-only",
+ mp->mnt_fsname);
+ vfsflags |= MS_RDONLY;
}
- // If we have no arguments, show currently mounted filesystems
+ // Abort entirely if permission denied.
- if(!all && (optind == argc)) {
- FILE *mountTable = setmntent(bb_path_mtab_file, "r");
+ if (rc && errno == EPERM)
+ bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
- if(!mountTable) bb_perror_msg_and_die(bb_path_mtab_file);
+ /* If the mount was successful, and we're maintaining an old-style
+ * mtab file by hand, add the new entry to it now. */
- while (getmntent_r(mountTable,&m,path,sizeof(path))) {
- blockDevice = m.mnt_fsname;
+ if(ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc) {
+ FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
+ int i;
- // Clean up display a little bit regarding root devie
- if(!strcmp(blockDevice, "rootfs")) continue;
- if(!strcmp(blockDevice, "/dev/root"))
- blockDevice = find_block_device("/");
+ if(!mountTable)
+ bb_error_msg("No %s\n",bb_path_mtab_file);
- if(!fsType || !strcmp(m.mnt_type, fsType))
- printf("%s on %s type %s (%s)\n", blockDevice, m.mnt_dir,
- m.mnt_type, m.mnt_opts);
- if(ENABLE_FEATURE_CLEAN_UP && blockDevice != m.mnt_fsname)
- free(blockDevice);
- }
+ // Add vfs string flags
+
+ for(i=0; mount_options[i].flags != MS_REMOUNT; i++)
+ if (mount_options[i].flags > 0)
+ append_mount_options(&(mp->mnt_opts),
+// Shut up about the darn const. It's not important. I don't care.
+ (char *)mount_options[i].name);
+
+ // Remove trailing / (if any) from directory we mounted on
+
+ i = strlen(mp->mnt_dir);
+ if(i>1 && mp->mnt_dir[i-1] == '/') mp->mnt_dir[i-1] = 0;
+
+ // Write and close.
+
+ if(!mp->mnt_type || !*mp->mnt_type) mp->mnt_type="--bind";
+ addmntent(mountTable, mp);
endmntent(mountTable);
- return EXIT_SUCCESS;
+ if (ENABLE_FEATURE_CLEAN_UP)
+ if(strcmp(mp->mnt_type,"--bind")) mp->mnt_type = 0;
}
- /* 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. */
+ return rc;
+}
+
- 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]);
+// Mount one directory. Handles NFS, loopback, autobind, and filesystem type
+// detection. Returns 0 for success, nonzero for failure.
- // If we don't have to loop through fstab, skip ahead a bit.
+static int singlemount(struct mntent *mp, int ignore_busy)
+{
+ int rc = -1, vfsflags;
+ char *loopFile = 0, *filteropts = 0;
+ llist_t *fl = 0;
+ struct stat st;
- if(!all && optind+1!=argc) goto singlemount;
+ vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
- // Loop through /etc/fstab entries to look up this entry.
+ // Treat fstype "auto" as unspecified.
- if(!(file=setmntent("/etc/fstab","r")))
- bb_perror_msg_and_die("\nCannot read /etc/fstab");
- for(;;) {
+ if (mp->mnt_type && !strcmp(mp->mnt_type,"auto")) mp->mnt_type = 0;
- // Get next fstab entry
+ // Might this be an NFS filesystem?
- if(!getmntent_r(file,&m,path,sizeof(path))) {
- if(!all)
- bb_perror_msg("Can't find %s in /etc/fstab\n", blockDevice);
- break;
+ if (ENABLE_FEATURE_MOUNT_NFS &&
+ (!mp->mnt_type || !strcmp(mp->mnt_type,"nfs")) &&
+ strchr(mp->mnt_fsname, ':') != NULL)
+ {
+ if (nfsmount(mp->mnt_fsname, mp->mnt_dir, &vfsflags, &filteropts, 1)) {
+ bb_perror_msg("nfsmount failed");
+ goto report_error;
+ } else {
+ // Strangely enough, nfsmount() doesn't actually mount() anything.
+ mp->mnt_type = "nfs";
+ rc = mount_it_now(mp, vfsflags, filteropts);
+ if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
+
+ goto report_error;
}
-
- // If we're mounting all and all doesn't mount this one, skip it.
-
- if(all) {
- if(strstr(m.mnt_opts,"noauto") || strstr(m.mnt_type,"swap"))
- continue;
- flags=0;
-
- /* 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 */
-
- } 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;
-
- /* 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). */
-
- if(!flags) {
- if(ENABLE_FEATURE_CLEAN_UP) free(string_flags);
- string_flags=NULL;
- parse_mount_options(m.mnt_opts, &flags, &string_flags);
+ }
+
+ // Look at the file. (Not found isn't a failure for remount, or for
+ // a synthetic filesystem like proc or sysfs.)
+
+ if (lstat(mp->mnt_fsname, &st));
+ else if (!(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))) {
+ // Do we need to allocate a loopback device for it?
+
+ if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
+ loopFile = bb_simplify_path(mp->mnt_fsname);
+ mp->mnt_fsname = 0;
+ switch(set_loop(&(mp->mnt_fsname), loopFile, 0)) {
+ case 0:
+ case 1:
+ break;
+ default:
+ bb_error_msg( errno == EPERM || errno == EACCES
+ ? bb_msg_perm_denied_are_you_root
+ : "Couldn't setup loop device");
+ return errno;
+ }
+
+ // Autodetect bind mounts
+
+ } else if (S_ISDIR(st.st_mode) && !mp->mnt_type) vfsflags |= MS_BIND;
+ }
+
+ /* If we know the fstype (or don't need to), jump straight
+ * to the actual mount. */
+
+ if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
+ rc = mount_it_now(mp, vfsflags, filteropts);
+
+ // Loop through filesystem types until mount succeeds or we run out
+
+ else {
+
+ /* Initialize list of block backed filesystems. This has to be
+ * done here so that during "mount -a", mounts after /proc shows up
+ * can autodetect. */
+
+ if (!fslist) {
+ fslist = get_block_backed_filesystems();
+ if (ENABLE_FEATURE_CLEAN_UP && fslist)
+ atexit(delete_block_backed_filesystems);
}
- /* Fill out remaining fields with info from mtab */
+ for (fl = fslist; fl; fl = fl->link) {
+ mp->mnt_type = fl->data;
- if(ENABLE_FEATURE_CLEAN_UP) {
- free(blockDevice);
- blockDevice=strdup(m.mnt_fsname);
- free(directory);
- directory=strdup(m.mnt_type);
- } else {
- blockDevice=m.mnt_fsname;
- directory=m.mnt_dir;
+ if (!(rc = mount_it_now(mp,vfsflags, filteropts))) break;
+
+ mp->mnt_type = 0;
}
- fsType=m.mnt_type;
+ }
- /* Ok, we're ready to actually mount a specific source on a specific
- * directory now. */
+ if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
-singlemount:
+ // If mount failed, clean up loop file (if any).
- // If they said -w, override fstab
+ if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
+ del_loop(mp->mnt_fsname);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(loopFile);
+ free(mp->mnt_fsname);
+ }
+ }
+report_error:
+ if (rc && errno == EBUSY && ignore_busy) rc = 0;
+ if (rc < 0)
+ bb_perror_msg("Mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
- if(allowWrite) flags&=~MS_RDONLY;
+ return rc;
+}
- // Might this be an NFS filesystem?
+// Parse options, if necessary parse fstab/mtab, and call singlemount for
+// each directory to be mounted.
- if(ENABLE_NFSMOUNT && (!fsType || !strcmp(fsType,"nfs")) &&
- strchr(blockDevice, ':') != NULL)
- {
- if(nfsmount(blockDevice, directory, &flags, &string_flags, 1))
- bb_perror_msg("nfsmount failed");
- else {
- rc=EXIT_SUCCESS;
- fsType="nfs";
- }
- } else {
-
- // Do we need to allocate a loopback device?
+int mount_main(int argc, char **argv)
+{
+ char *cmdopts = xstrdup(""), *fstabname, *fstype=0, *storage_path=0;
+ FILE *fstab;
+ int i, opt, all = FALSE, rc = 0;
+ struct mntent mtpair[2], *mtcur = mtpair;
- 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;
- }
- }
+ /* parse long options, like --bind and --move. Note that -o option
+ * and --option are synonymous. Yes, this means --remount,rw works. */
+
+ for (i = opt = 0; i < argc; i++) {
+ if (argv[i][0] == '-' && argv[i][1] == '-') {
+ append_mount_options(&cmdopts,argv[i]+2);
+ } else argv[opt++] = argv[i];
+ }
+ argc = opt;
- /* If we know the fstype (or don't need to), jump straight
- * to the actual mount. */
+ // Parse remaining options
- if(fsType || (flags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
- goto mount_it_now;
+ while ((opt = getopt(argc, argv, "o:t:rwavnf")) > 0) {
+ switch (opt) {
+ case 'o':
+ append_mount_options(&cmdopts, optarg);
+ break;
+ case 't':
+ fstype = optarg;
+ break;
+ case 'r':
+ append_mount_options(&cmdopts, "ro");
+ break;
+ case 'w':
+ append_mount_options(&cmdopts, "rw");
+ break;
+ case 'a':
+ all = TRUE;
+ break;
+ case 'n':
+ USE_FEATURE_MTAB_SUPPORT(useMtab = FALSE;)
+ break;
+ case 'f':
+ USE_FEATURE_MTAB_SUPPORT(fakeIt = FALSE;)
+ break;
+ case 'v':
+ break; // ignore -v
+ default:
+ bb_show_usage();
}
-
- // 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))
+ }
+
+ // Three or more non-option arguments? Die with a usage message.
+
+ if (optind-argc>2) bb_show_usage();
+
+ // If we have no arguments, show currently mounted filesystems
+
+ if (optind == argc) {
+ if (!all) {
+ FILE *mountTable = setmntent(bb_path_mtab_file, "r");
+
+ if(!mountTable) bb_error_msg_and_die("No %s",bb_path_mtab_file);
+
+ while (getmntent_r(mountTable,mtpair,bb_common_bufsiz1,
+ sizeof(bb_common_bufsiz1)))
{
- // 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) break;
+ // Don't show rootfs.
+ if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
+
+ 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(f) fclose(f);
- if(!f || !rc) break;
+ if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable);
+ return EXIT_SUCCESS;
}
+ }
+
+ // 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 (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, 0);
+ goto clean_up;
+ }
+
+ // 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
+
+ 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.
+
+ memset(mtpair,0,sizeof(mtpair));
+ for (;;) {
+ struct mntent *mtnext = mtpair + (mtcur==mtpair ? 1 : 0);
+
+ // Get next fstab entry
+
+ if (!getmntent_r(fstab, mtcur, bb_common_bufsiz1
+ + (mtcur==mtpair ? sizeof(bb_common_bufsiz1)/2 : 0),
+ sizeof(bb_common_bufsiz1)/2))
+ {
+ // Were we looking for something specific?
+
+ if (optind != argc) {
+
+ // If we didn't find anything, complain.
- /* If the mount was sucessful, 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);
+ 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 = xstrdup(mtcur->mnt_opts);
+ append_mount_options(&(mtcur->mnt_opts),cmdopts);
+ rc = singlemount(mtcur, 0);
+ free(mtcur->mnt_opts);
}
+ goto clean_up;
+ }
+
+ /* 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 (optind != argc) {
+
+ // Is this what we're looking for?
+
+ 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;
+
+ // Remember this entry. Something later may have overmounted
+ // it, and we want the _last_ match.
+
+ mtcur = mtnext;
+
+ // If we're mounting all.
+
} else {
- // Mount failed. Clean up
- if(loopFile) {
- del_loop(blockDevice);
- if(ENABLE_FEATURE_CLEAN_UP) free(loopFile);
+
+ // 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.
+
+ if (singlemount(mtcur, 1)) {
+ /* Count number of failed mounts */
+ rc++;
}
- // 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);
- free(blockDevice);
- free(directory);
}
- 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);
+clean_up:
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(storage_path);
+ free(cmdopts);
+ }
- return rc ? : EXIT_FAILURE;
+ return rc;
}
projects / oweals / busybox.git / blobdiff