* Mini mount implementation for busybox
*
* 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
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * 3/21/1999 Charles P. Wright <cpwright@cpwright.com>
- * searches through fstab when -a is passed
- * will try mounting stuff with all fses when passed -t auto
- *
- * 1999-04-17 Dave Cinege...Rewrote -t auto. Fixed ro mtab.
- *
- * 1999-10-07 Erik Andersen <andersen@lineo.com>, <andersee@debian.org>.
- * Rewrite of a lot of code. Removed mtab usage (I plan on
- * putting it back as a compile-time option some time),
- * major adjustments to option parsing, and some serious
- * dieting all around.
- *
- * 1999-11-06 mtab suppport is back - andersee
- *
- * 2000-01-12 Ben Collins <bcollins@debian.org>, Borrowed utils-linux's
- * mount to add loop support.
*/
-#include "internal.h"
+#include <limits.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <mntent.h>
-#include <sys/mount.h>
#include <ctype.h>
-#include <fstab.h>
-#if defined BB_FEATURE_USE_DEVPS_PATCH
-#include <linux/devmtab.h>
-#endif
-
-
-#if defined BB_FEATURE_MOUNT_LOOP
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <linux/loop.h>
-
-
-static int use_loop = FALSE;
+#include <sys/mount.h>
+#include <fcntl.h> // for CONFIG_FEATURE_MOUNT_LOOP
+#include <sys/ioctl.h> // for CONFIG_FEATURE_MOUNT_LOOP
+#include "busybox.h"
+
+/* 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
-extern const char mtab_file[]; /* Defined in utility.c */
-
-static const char mount_usage[] = "\tmount [flags]\n"
- "\tmount [flags] device directory [-o options,more-options]\n"
- "\n" "Flags:\n" "\t-a:\tMount all file systems in fstab.\n"
-#ifdef BB_MTAB
- "\t-f:\t\"Fake\" mount. Add entry to mount table but don't mount it.\n"
- "\t-n:\tDon't write a mount table entry.\n"
+// These two aren't always defined in old headers
+#ifndef MS_BIND
+#define MS_BIND 4096
#endif
- "\t-o option:\tOne of many filesystem options, listed below.\n"
- "\t-r:\tMount the filesystem read-only.\n"
- "\t-t filesystem-type:\tSpecify the filesystem type.\n"
- "\t-w:\tMount for reading and writing (default).\n"
- "\n"
- "Options for use with the \"-o\" flag:\n"
- "\tasync / sync:\tWrites are asynchronous / synchronous.\n"
- "\tdev / nodev:\tAllow use of special device files / disallow them.\n"
- "\texec / noexec:\tAllow use of executable files / disallow them.\n"
-#if defined BB_FEATURE_MOUNT_LOOP
- "\tloop: Mounts a file via loop device.\n"
+#ifndef MS_MOVE
+#define MS_MOVE 8192
#endif
- "\tsuid / nosuid:\tAllow set-user-id-root programs / disallow them.\n"
- "\tremount: Re-mount a currently-mounted filesystem, changing its flags.\n"
- "\tro / rw: Mount for read-only / read-write.\n"
- "\t"
-
- "There are EVEN MORE flags that are specific to each filesystem.\n"
- "You'll have to see the written documentation for those.\n";
+/* 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 */
-struct mount_options {
+struct {
const char *name;
- unsigned long and;
- unsigned long or;
+ long flags;
+} static const mount_options[] = {
+ {"loop", 0},
+ {"defaults", 0},
+ {"noauto", 0},
+ {"ro", MS_RDONLY},
+ {"rw", ~MS_RDONLY},
+ {"nosuid", MS_NOSUID},
+ {"suid", ~MS_NOSUID},
+ {"dev", ~MS_NODEV},
+ {"nodev", MS_NODEV},
+ {"exec", ~MS_NOEXEC},
+ {"noexec", MS_NOEXEC},
+ {"sync", MS_SYNCHRONOUS},
+ {"async", ~MS_SYNCHRONOUS},
+ {"remount", MS_REMOUNT},
+ {"atime", MS_NOATIME},
+ {"noatime", MS_NOATIME},
+ {"diratime", MS_NODIRATIME},
+ {"nodiratime", MS_NODIRATIME},
+ {"bind", MS_BIND},
+ {"move", MS_MOVE}
};
-static const struct mount_options mount_options[] = {
- {"async", ~MS_SYNCHRONOUS, 0},
- {"defaults", ~0, 0},
- {"dev", ~MS_NODEV, 0},
- {"exec", ~MS_NOEXEC, 0},
- {"nodev", ~0, MS_NODEV},
- {"noexec", ~0, MS_NOEXEC},
- {"nosuid", ~0, MS_NOSUID},
- {"remount", ~0, MS_REMOUNT},
- {"ro", ~0, MS_RDONLY},
- {"rw", ~MS_RDONLY, 0},
- {"suid", ~MS_NOSUID, 0},
- {"sync", ~0, MS_SYNCHRONOUS},
- {0, 0, 0}
-};
-
-static int
-do_mount(char *specialfile, char *dir, char *filesystemtype,
- long flags, void *string_flags, int useMtab, int fakeIt,
- char *mtab_opts)
+/* Uses the mount_options list above */
+static void parse_mount_options(char *options, int *flags, char **strflags)
{
- int status = 0;
- char *lofile = NULL;
+ // Loop through options
+ for(;;) {
+ int i;
+ char *comma = strchr(options, ',');
-#if defined BB_MTAB
- if (fakeIt == FALSE)
-#endif
- {
-#if defined BB_FEATURE_MOUNT_LOOP
- if (use_loop==TRUE) {
- int loro = flags & MS_RDONLY;
- char *lofile = specialfile;
-
- specialfile = find_unused_loop_device();
- if (specialfile == NULL) {
- fprintf(stderr, "Could not find a spare loop device\n");
- return (FALSE);
- }
- if (set_loop(specialfile, lofile, 0, &loro)) {
- fprintf(stderr, "Could not setup loop device\n");
- return (FALSE);
- }
- if (!(flags & MS_RDONLY) && loro) { /* loop is ro, but wanted rw */
- fprintf(stderr, "WARNING: loop device is read-only\n");
- flags &= ~MS_RDONLY;
+ 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)) {
+ long fl = mount_options[i].flags;
+ if(fl < 0) *flags &= fl;
+ else *flags |= fl;
+ break;
}
- use_loop = FALSE;
}
-#endif
- status =
- mount(specialfile, dir, filesystemtype, flags, string_flags);
+ // Unrecognized mount option?
+ if(i == sizeof(mount_options)) {
+ // Add it to strflags, to pass on to kernel
+ i = *strflags ? strlen(*strflags) : 0;
+ *strflags = xrealloc(*strflags, i+strlen(options)+2);
+ // Comma separated if it's not the first one
+ if(i) (*strflags)[i] = ',';
+ strcpy((*strflags)+i, options);
+ }
+ // Advance to next option, or finish
+ if(comma) {
+ *comma = ',';
+ options = ++comma;
+ } else break;
}
+}
+/* This does the work */
- /* If the mount was sucessful, do anything needed, then return TRUE */
- if (status == 0) {
-
-#if defined BB_MTAB
- if (useMtab == TRUE) {
- write_mtab(specialfile, dir, filesystemtype, flags, mtab_opts);
- }
-#endif
- return (TRUE);
+extern int mount_main(int argc, char **argv)
+{
+ 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 = 1, 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;
+
+ /* 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] == '-')
+ parse_mount_options(argv[i]+2, &flags, &string_flags);
+ else argv[opt++] = argv[i];
}
+ argc = opt;
- /* Bummer. mount failed. Clean up */
-#if defined BB_FEATURE_MOUNT_LOOP
- if (lofile != NULL) {
- del_loop(specialfile);
- }
-#endif
- return (FALSE);
-}
+ // Parse remaining options
+ 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;
+ break;
+ case 'v':
+ break; // ignore -v
+ default:
+ bb_show_usage();
+ }
+ }
+ // If we have no arguments, show currently mounted filesystems
-/* Seperate standard mount options from the nonstandard string options */
-static void
-parse_mount_options(char *options, unsigned long *flags, char *strflags)
-{
- while (options) {
- int gotone = FALSE;
- char *comma = strchr(options, ',');
- const struct mount_options *f = mount_options;
+ if(!all && (optind == argc)) {
+ FILE *mountTable = setmntent(bb_path_mtab_file, "r");
- if (comma)
- *comma = '\0';
+ if(!mountTable) bb_perror_msg_and_die(bb_path_mtab_file);
- while (f->name != 0) {
- if (strcasecmp(f->name, options) == 0) {
+ while (getmntent_r(mountTable,&m,path,sizeof(path))) {
+ blockDevice = m.mnt_fsname;
- *flags &= f->and;
- *flags |= f->or;
- gotone = TRUE;
- break;
- }
- f++;
- }
-#if defined BB_FEATURE_MOUNT_LOOP
- if (gotone == FALSE && !strcasecmp("loop", options)) { /* loop device support */
- use_loop = TRUE;
- gotone = TRUE;
- }
-#endif
- if (*strflags && strflags != '\0' && gotone == FALSE) {
- char *temp = strflags;
+ // Clean up display a little bit regarding root devie
+ if(!strcmp(blockDevice, "rootfs")) continue;
+ if(!strcmp(blockDevice, "/dev/root"))
+ blockDevice = find_block_device("/");
- temp += strlen(strflags);
- *temp++ = ',';
- *temp++ = '\0';
- }
- if (gotone == FALSE)
- strcat(strflags, options);
- if (comma) {
- *comma = ',';
- options = ++comma;
- } else {
- break;
+ 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);
}
+ endmntent(mountTable);
+ return EXIT_SUCCESS;
}
-}
-int
-mount_one(char *blockDevice, char *directory, char *filesystemType,
- unsigned long flags, char *string_flags, int useMtab, int fakeIt,
- char *mtab_opts, int whineOnErrors)
-{
- int status = 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. */
-#if defined BB_FEATURE_USE_PROCFS
- char buf[255];
- if (strcmp(filesystemType, "auto") == 0) {
- FILE *f = fopen("/proc/filesystems", "r");
+ 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]);
- if (f == NULL)
- return (FALSE);
+ // If we don't have to loop through fstab, skip ahead a bit.
- while (fgets(buf, sizeof(buf), f) != NULL) {
- filesystemType = buf;
- if (*filesystemType == '\t') { // Not a nodev filesystem
+ if(!all && optind+1!=argc) goto singlemount;
- // Add NULL termination to each line
- while (*filesystemType && *filesystemType != '\n')
- filesystemType++;
- *filesystemType = '\0';
+ // Loop through /etc/fstab entries to look up this entry.
- filesystemType = buf;
- filesystemType++; // hop past tab
+ if(!(file=setmntent("/etc/fstab","r")))
+ bb_perror_msg_and_die("\nCannot read /etc/fstab");
+ for(;;) {
- status = do_mount(blockDevice, directory, filesystemType,
- flags | MS_MGC_VAL, string_flags,
- useMtab, fakeIt, mtab_opts);
- if (status == TRUE)
- break;
- }
+ // 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);
+ break;
}
- fclose(f);
- } else
-#endif
-#if defined BB_FEATURE_USE_DEVPS_PATCH
- if (strcmp(filesystemType, "auto") == 0) {
- int fd, i, numfilesystems;
- char device[] = "/dev/mtab";
- struct k_fstype *fslist;
-
- /* open device */
- fd = open(device, O_RDONLY);
- if (fd < 0)
- fatalError("open failed for `%s': %s\n", device, strerror (errno));
-
- /* How many filesystems? We need to know to allocate enough space */
- numfilesystems = ioctl (fd, DEVMTAB_COUNT_FILESYSTEMS);
- if (numfilesystems<0)
- fatalError("\nDEVMTAB_COUNT_FILESYSTEMS: %s\n", strerror (errno));
- fslist = (struct k_fstype *) calloc ( numfilesystems, sizeof(struct k_fstype));
-
- /* Grab the list of available filesystems */
- status = ioctl (fd, DEVMTAB_GET_FILESYSTEMS, fslist);
- if (status<0)
- fatalError("\nDEVMTAB_GET_FILESYSTEMS: %s\n", strerror (errno));
-
- /* Walk the list trying to mount filesystems
- * that do not claim to be nodev filesystems */
- for( i = 0 ; i < numfilesystems ; i++) {
- if (fslist[i].mnt_nodev)
+
+ // 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;
- status = do_mount(blockDevice, directory, fslist[i].mnt_type,
- flags | MS_MGC_VAL, string_flags,
- useMtab, fakeIt, mtab_opts);
- if (status == TRUE)
- break;
+ 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);
}
- free( fslist);
- close(fd);
- } else
-#endif
- {
- status = do_mount(blockDevice, directory, filesystemType,
- flags | MS_MGC_VAL, string_flags, useMtab,
- fakeIt, mtab_opts);
- }
- if (status == FALSE && whineOnErrors == TRUE) {
- if (whineOnErrors == TRUE) {
- fprintf(stderr, "Mounting %s on %s failed: %s\n",
- blockDevice, directory, strerror(errno));
- }
- return (FALSE);
- }
- return (TRUE);
-}
+ /* Fill out remaining fields with info from mtab */
-extern int mount_main(int argc, char **argv)
-{
- char string_flags_buf[1024] = "";
- char *string_flags = string_flags_buf;
- char *extra_opts = string_flags_buf;
- unsigned long flags = 0;
- char *filesystemType = "auto";
- char *device = NULL;
- char *directory = NULL;
- int all = FALSE;
- int fakeIt = FALSE;
- int useMtab = TRUE;
- int i;
-
- /* Only compiled in if BB_MTAB is not defined */
- whine_if_fstab_is_missing();
-
-#if defined BB_FEATURE_USE_DEVPS_PATCH
- if (argc == 1) {
- int fd, i, numfilesystems;
- char device[] = "/dev/mtab";
- struct k_mntent *mntentlist;
-
- /* open device */
- fd = open(device, O_RDONLY);
- if (fd < 0)
- fatalError("open failed for `%s': %s\n", device, strerror (errno));
-
- /* How many mounted filesystems? We need to know to
- * allocate enough space for later... */
- numfilesystems = ioctl (fd, DEVMTAB_COUNT_MOUNTS);
- if (numfilesystems<0)
- fatalError( "\nDEVMTAB_COUNT_MOUNTS: %s\n", strerror (errno));
- mntentlist = (struct k_mntent *) calloc ( numfilesystems, sizeof(struct k_mntent));
-
- /* Grab the list of mounted filesystems */
- if (ioctl (fd, DEVMTAB_GET_MOUNTS, mntentlist)<0)
- fatalError( "\nDEVMTAB_GET_MOUNTS: %s\n", strerror (errno));
-
- for( i = 0 ; i < numfilesystems ; i++) {
- fprintf( stdout, "%s %s %s %s %d %d\n", mntentlist[i].mnt_fsname,
- mntentlist[i].mnt_dir, mntentlist[i].mnt_type,
- mntentlist[i].mnt_opts, mntentlist[i].mnt_freq,
- mntentlist[i].mnt_passno);
- }
- free( mntentlist);
- close(fd);
- exit(TRUE);
- }
-#else
- if (argc == 1) {
- FILE *mountTable = setmntent(mtab_file, "r");
-
- if (mountTable) {
- struct mntent *m;
-
- while ((m = getmntent(mountTable)) != 0) {
- struct fstab *fstabItem;
- char *blockDevice = m->mnt_fsname;
-
- /* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */
- if (strcmp(blockDevice, "/dev/root") == 0) {
- fstabItem = getfsfile("/");
- if (fstabItem != NULL)
- blockDevice = fstabItem->fs_spec;
- }
- printf("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
- m->mnt_type, m->mnt_opts);
- }
- endmntent(mountTable);
+ if(ENABLE_FEATURE_CLEAN_UP) {
+ free(blockDevice);
+ blockDevice=strdup(m.mnt_fsname);
+ free(directory);
+ directory=strdup(m.mnt_type);
} else {
- perror(mtab_file);
+ blockDevice=m.mnt_fsname;
+ directory=m.mnt_dir;
}
- exit(TRUE);
- }
-#endif
+ fsType=m.mnt_type;
- /* Parse options */
- i = --argc;
- argv++;
- while (i > 0 && **argv) {
- if (**argv == '-') {
- char *opt = *argv;
-
- while (i > 0 && *++opt)
- switch (*opt) {
- case 'o':
- if (--i == 0) {
- goto goodbye;
- }
- parse_mount_options(*(++argv), &flags, string_flags);
- break;
- case 'r':
- flags |= MS_RDONLY;
- break;
- case 't':
- if (--i == 0) {
- goto goodbye;
- }
- filesystemType = *(++argv);
- break;
- case 'w':
- flags &= ~MS_RDONLY;
- break;
- case 'a':
- all = TRUE;
- break;
-#ifdef BB_MTAB
- case 'f':
- fakeIt = TRUE;
- break;
- case 'n':
- useMtab = FALSE;
- break;
-#endif
- case 'v':
- case 'h':
- case '-':
- goto goodbye;
- }
- } else {
- if (device == NULL)
- device = *argv;
- else if (directory == NULL)
- directory = *argv;
+ /* 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_NFSMOUNT && (!fsType || !strcmp(fsType,"nfs")) &&
+ strchr(blockDevice, ':') != NULL)
+ {
+ if(nfsmount(blockDevice, directory, &flags, &string_flags, 1))
+ bb_perror_msg("nfsmount failed");
else {
- goto goodbye;
+ rc = 0;
+ fsType="nfs";
}
- }
- i--;
- argv++;
- }
-
- if (all == TRUE) {
- struct mntent *m;
- FILE *f = setmntent("/etc/fstab", "r");
-
- if (f == NULL)
- fatalError( "\nCannot ream /etc/fstab: %s\n", strerror (errno));
-
- while ((m = getmntent(f)) != NULL) {
- // If the file system isn't noauto,
- // and isn't swap or nfs, then mount it
- if ((!strstr(m->mnt_opts, "noauto")) &&
- (!strstr(m->mnt_type, "swap")) &&
- (!strstr(m->mnt_type, "nfs"))) {
- flags = 0;
- *string_flags = '\0';
- parse_mount_options(m->mnt_opts, &flags, string_flags);
- /* If the directory is /, try to remount
- * with the options specified in fstab */
- if (m->mnt_dir[0] == '/' && m->mnt_dir[1] == '\0') {
- flags |= MS_REMOUNT;
+ } 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 (mount_one(m->mnt_fsname, m->mnt_dir, m->mnt_type,
- flags, string_flags, useMtab, fakeIt,
- extra_opts, FALSE))
- {
- /* Try again, but this time try a remount */
- mount_one(m->mnt_fsname, m->mnt_dir, m->mnt_type,
- flags|MS_REMOUNT, string_flags, useMtab, fakeIt,
- extra_opts, TRUE);
+ }
+
+ /* 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) break;
}
+ if(f) fclose(f);
+ if(!f || !rc) break;
}
- endmntent(f);
- } else {
- if (device && directory) {
-#ifdef BB_NFSMOUNT
- if (strcmp(filesystemType, "nfs") == 0) {
- if (nfsmount
- (device, directory, &flags, &extra_opts, &string_flags,
- 1) != 0)
- exit(FALSE);
+
+ /* 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);
}
-#endif
- exit(mount_one(device, directory, filesystemType,
- flags, string_flags, useMtab, fakeIt,
- extra_opts, TRUE));
} else {
- goto goodbye;
+ // 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);
+ free(blockDevice);
+ free(directory);
}
+ if(!all) break;
}
- exit(TRUE);
- goodbye:
- usage(mount_usage);
+ if(file) endmntent(file);
+ if(rc) bb_perror_msg("Mounting %s on %s failed", blockDevice, directory);
+
+ return rc;
}
projects / oweals / busybox.git / blobdiff