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-rw-r--r--mount.c498
1 files changed, 0 insertions, 498 deletions
diff --git a/mount.c b/mount.c
deleted file mode 100644
index af57a76..0000000
--- a/mount.c
+++ /dev/null
@@ -1,498 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Mini mount implementation for busybox
- *
- * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
- *
- * 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
- *
- * 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.
- *
- * 2000-04-30 Dave Cinege <dcinege@psychosis.com>
- * Rewrote fstab while loop and lower mount section. Can now do
- * single mounts from fstab. Can override fstab options for single
- * mount. Common mount_one call for single mounts and 'all'. Fixed
- * mtab updating and stale entries. Removed 'remount' default.
- *
- */
-
-#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 "busybox.h"
-#if defined BB_FEATURE_USE_DEVPS_PATCH
-# include <linux/devmtab.h> /* For Erik's nifty devmtab device driver */
-#endif
-
-enum {
- MS_MGC_VAL = 0xc0ed0000, /* Magic number indicatng "new" flags */
- MS_RDONLY = 1, /* Mount read-only */
- MS_NOSUID = 2, /* Ignore suid and sgid bits */
- MS_NODEV = 4, /* Disallow access to device special files */
- MS_NOEXEC = 8, /* Disallow program execution */
- MS_SYNCHRONOUS = 16, /* Writes are synced at once */
- MS_REMOUNT = 32, /* Alter flags of a mounted FS */
- MS_MANDLOCK = 64, /* Allow mandatory locks on an FS */
- S_QUOTA = 128, /* Quota initialized for file/directory/symlink */
- S_APPEND = 256, /* Append-only file */
- S_IMMUTABLE = 512, /* Immutable file */
- MS_NOATIME = 1024, /* Do not update access times. */
- MS_NODIRATIME = 2048, /* Do not update directory access times */
- MS_BIND = 4096, /* Use the new linux 2.4.x "mount --bind" feature */
-};
-
-
-#if defined BB_FEATURE_MOUNT_LOOP
-#include <fcntl.h>
-#include <sys/ioctl.h>
-static int use_loop = FALSE;
-#endif
-
-extern int mount (__const char *__special_file, __const char *__dir,
- __const char *__fstype, unsigned long int __rwflag,
- __const void *__data);
-extern int umount (__const char *__special_file);
-extern int umount2 (__const char *__special_file, int __flags);
-
-extern int sysfs( int option, unsigned int fs_index, char * buf);
-
-extern const char mtab_file[]; /* Defined in utility.c */
-
-struct mount_options {
- const char *name;
- unsigned long and;
- unsigned long or;
-};
-
-static const struct mount_options mount_options[] = {
- {"async", ~MS_SYNCHRONOUS, 0},
- {"atime", ~0, ~MS_NOATIME},
- {"defaults", ~0, 0},
- {"dev", ~MS_NODEV, 0},
- {"diratime", ~0, ~MS_NODIRATIME},
- {"exec", ~MS_NOEXEC, 0},
- {"noatime", ~0, MS_NOATIME},
- {"nodev", ~0, MS_NODEV},
- {"nodiratime", ~0, MS_NODIRATIME},
- {"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},
- {"bind", ~0, MS_BIND},
- {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, int mount_all)
-{
- int status = 0;
-#if defined BB_FEATURE_MOUNT_LOOP
- char *lofile = NULL;
-#endif
-
- if (fakeIt == FALSE)
- {
-#if defined BB_FEATURE_MOUNT_LOOP
- if (use_loop==TRUE) {
- int loro = flags & MS_RDONLY;
-
- lofile = specialfile;
-
- specialfile = find_unused_loop_device();
- if (specialfile == NULL) {
- error_msg_and_die("Could not find a spare loop device");
- }
- if (set_loop(specialfile, lofile, 0, &loro)) {
- error_msg_and_die("Could not setup loop device");
- }
- if (!(flags & MS_RDONLY) && loro) { /* loop is ro, but wanted rw */
- error_msg("WARNING: loop device is read-only");
- flags |= MS_RDONLY;
- }
- }
-#endif
- status = mount(specialfile, dir, filesystemtype, flags, string_flags);
- if (status < 0 && errno == EROFS) {
- error_msg("%s is write-protected, mounting read-only", specialfile);
- status = mount(specialfile, dir, filesystemtype, flags |= MS_RDONLY, string_flags);
- }
- /* Don't whine about already mounted filesystems when mounting all. */
- if (status < 0 && errno == EBUSY && mount_all)
- return TRUE;
- }
-
-
- /* If the mount was sucessful, do anything needed, then return TRUE */
- if (status == 0 || fakeIt==TRUE) {
-
-#if defined BB_FEATURE_MTAB_SUPPORT
- if (useMtab == TRUE) {
- erase_mtab(specialfile); // Clean any stale entries
- write_mtab(specialfile, dir, filesystemtype, flags, mtab_opts);
- }
-#endif
- return (TRUE);
- }
-
- /* Bummer. mount failed. Clean up */
-#if defined BB_FEATURE_MOUNT_LOOP
- if (lofile != NULL) {
- del_loop(specialfile);
- }
-#endif
-
- if (errno == EPERM) {
- error_msg_and_die("permission denied. Are you root?");
- }
-
- return (FALSE);
-}
-
-
-
-/* Seperate standard mount options from the nonstandard string options */
-static void
-parse_mount_options(char *options, int *flags, char *strflags)
-{
- while (options) {
- int gotone = FALSE;
- char *comma = strchr(options, ',');
- const struct mount_options *f = mount_options;
-
- if (comma)
- *comma = '\0';
-
- while (f->name != 0) {
- if (strcasecmp(f->name, options) == 0) {
-
- *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;
-
- temp += strlen(strflags);
- *temp++ = ',';
- *temp++ = '\0';
- }
- if (gotone == FALSE)
- strcat(strflags, options);
- if (comma) {
- *comma = ',';
- options = ++comma;
- } else {
- break;
- }
- }
-}
-
-static 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 mount_all)
-{
- int status = 0;
-
-#if defined BB_FEATURE_USE_DEVPS_PATCH
- if (strcmp(filesystemType, "auto") == 0) {
- static const char *noauto_array[] = { "tmpfs", "shm", "proc", "ramfs", "devpts", "devfs", "usbdevfs", 0 };
- const char **noauto_fstype;
- const int num_of_filesystems = sysfs(3, 0, 0);
- char buf[255];
- int i=0;
-
- filesystemType=buf;
-
- while(i < num_of_filesystems) {
- sysfs(2, i++, filesystemType);
- for (noauto_fstype = noauto_array; *noauto_fstype; noauto_fstype++) {
- if (!strcmp(filesystemType, *noauto_fstype)) {
- break;
- }
- }
- if (!*noauto_fstype) {
- status = do_mount(blockDevice, directory, filesystemType,
- flags | MS_MGC_VAL, string_flags,
- useMtab, fakeIt, mtab_opts, mount_all);
- if (status == TRUE)
- break;
- }
- }
- }
-#else
- if (strcmp(filesystemType, "auto") == 0) {
- char buf[255];
- FILE *f = xfopen("/proc/filesystems", "r");
-
- while (fgets(buf, sizeof(buf), f) != NULL) {
- filesystemType = buf;
- if (*filesystemType == '\t') { // Not a nodev filesystem
-
- // Add NULL termination to each line
- while (*filesystemType && *filesystemType != '\n')
- filesystemType++;
- *filesystemType = '\0';
-
- filesystemType = buf;
- filesystemType++; // hop past tab
-
- status = do_mount(blockDevice, directory, filesystemType,
- flags | MS_MGC_VAL, string_flags,
- useMtab, fakeIt, mtab_opts, mount_all);
- if (status == TRUE)
- break;
- }
- }
- fclose(f);
- }
-#endif
- else {
- status = do_mount(blockDevice, directory, filesystemType,
- flags | MS_MGC_VAL, string_flags, useMtab,
- fakeIt, mtab_opts, mount_all);
- }
-
- if (status == FALSE) {
- if (whineOnErrors == TRUE) {
- perror_msg("Mounting %s on %s failed", blockDevice, directory);
- }
- return (FALSE);
- }
- return (TRUE);
-}
-
-void show_mounts(void)
-{
-#if defined BB_FEATURE_USE_DEVPS_PATCH
- int fd, i, numfilesystems;
- char device[] = "/dev/mtab";
- struct k_mntent *mntentlist;
-
- /* open device */
- fd = open(device, O_RDONLY);
- if (fd < 0)
- perror_msg_and_die("open failed for `%s'", device);
-
- /* How many mounted filesystems? We need to know to
- * allocate enough space for later... */
- numfilesystems = ioctl (fd, DEVMTAB_COUNT_MOUNTS);
- if (numfilesystems<0)
- perror_msg_and_die( "\nDEVMTAB_COUNT_MOUNTS");
- mntentlist = (struct k_mntent *) xcalloc ( numfilesystems, sizeof(struct k_mntent));
-
- /* Grab the list of mounted filesystems */
- if (ioctl (fd, DEVMTAB_GET_MOUNTS, mntentlist)<0)
- perror_msg_and_die( "\nDEVMTAB_GET_MOUNTS");
-
- for( i = 0 ; i < numfilesystems ; i++) {
- printf( "%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);
- }
-#ifdef BB_FEATURE_CLEAN_UP
- /* Don't bother to close files or free memory. Exit
- * does that automagically, so we can save a few bytes */
- free( mntentlist);
- close(fd);
-#endif
- exit(EXIT_SUCCESS);
-#else
- FILE *mountTable = setmntent(mtab_file, "r");
-
- if (mountTable) {
- struct mntent *m;
-
- while ((m = getmntent(mountTable)) != 0) {
- char *blockDevice = m->mnt_fsname;
- if (strcmp(blockDevice, "/dev/root") == 0) {
- blockDevice = find_real_root_device_name(blockDevice);
- }
- printf("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
- m->mnt_type, m->mnt_opts);
-#ifdef BB_FEATURE_CLEAN_UP
- if(blockDevice != m->mnt_fsname)
- free(blockDevice);
-#endif
- }
- endmntent(mountTable);
- } else {
- perror_msg_and_die("%s", mtab_file);
- }
- exit(EXIT_SUCCESS);
-#endif
-}
-
-extern int mount_main(int argc, char **argv)
-{
- struct stat statbuf;
- char string_flags_buf[1024] = "";
- char *string_flags = string_flags_buf;
- char *extra_opts = string_flags_buf;
- int flags = 0;
- char *filesystemType = "auto";
- char *device = xmalloc(PATH_MAX);
- char *directory = xmalloc(PATH_MAX);
- int all = FALSE;
- int fakeIt = FALSE;
- int useMtab = TRUE;
- int rc = EXIT_FAILURE;
- int fstabmount = FALSE;
- int opt;
-
- /* Parse options */
- while ((opt = getopt(argc, argv, "o:rt:wafnv")) > 0) {
- switch (opt) {
- case 'o':
- parse_mount_options(optarg, &flags, string_flags);
- break;
- case 'r':
- flags |= MS_RDONLY;
- break;
- case 't':
- filesystemType = optarg;
- break;
- case 'w':
- flags &= ~MS_RDONLY;
- break;
- case 'a':
- all = TRUE;
- break;
- case 'f':
- fakeIt = TRUE;
- break;
-#ifdef BB_FEATURE_MTAB_SUPPORT
- case 'n':
- useMtab = FALSE;
- break;
-#endif
- case 'v':
- break; /* ignore -v */
- }
- }
-
- if (!all && optind == argc)
- show_mounts();
-
- if (optind < argc) {
- /* if device is a filename get its real path */
- if (stat(argv[optind], &statbuf) == 0) {
- device = simplify_path(argv[optind]);
- } else {
- safe_strncpy(device, argv[optind], PATH_MAX);
- }
- }
-
- if (optind + 1 < argc)
- directory = simplify_path(argv[optind + 1]);
-
- if (all == TRUE || optind + 1 == argc) {
- struct mntent *m = NULL;
- FILE *f = setmntent("/etc/fstab", "r");
- fstabmount = TRUE;
-
- if (f == NULL)
- perror_msg_and_die( "\nCannot read /etc/fstab");
-
- while ((m = getmntent(f)) != NULL) {
- if (all == FALSE && optind + 1 == argc && (
- (strcmp(device, m->mnt_fsname) != 0) &&
- (strcmp(device, m->mnt_dir) != 0) ) ) {
- continue;
- }
-
- if (all == TRUE && ( // If we're mounting 'all'
- (strstr(m->mnt_opts, "noauto")) || // and the file system isn't noauto,
- (strstr(m->mnt_type, "swap")) || // and isn't swap or nfs, then mount it
- (strstr(m->mnt_type, "nfs")) ) ) {
- continue;
- }
-
- if (all == TRUE || flags == 0) { // Allow single mount to override fstab flags
- flags = 0;
- *string_flags = '\0';
- parse_mount_options(m->mnt_opts, &flags, string_flags);
- }
-
- strcpy(device, m->mnt_fsname);
- strcpy(directory, m->mnt_dir);
- filesystemType = strdup(m->mnt_type);
-singlemount:
- string_flags = strdup(string_flags);
- rc = EXIT_SUCCESS;
-#ifdef BB_NFSMOUNT
- if (strchr(device, ':') != NULL)
- filesystemType = "nfs";
- if (strcmp(filesystemType, "nfs") == 0) {
- if (nfsmount (device, directory, &flags, &extra_opts,
- &string_flags, 1)) {
- perror_msg("nfsmount failed");
- rc = EXIT_FAILURE;
- }
- }
-#endif
- if (!mount_one(device, directory, filesystemType, flags,
- string_flags, useMtab, fakeIt, extra_opts, TRUE, all))
- rc = EXIT_FAILURE;
-
- if (all == FALSE)
- break;
- }
- if (fstabmount == TRUE)
- endmntent(f);
-
- if (all == FALSE && fstabmount == TRUE && m == NULL)
- fprintf(stderr, "Can't find %s in /etc/fstab\n", device);
-
- return rc;
- }
-
- goto singlemount;
-}
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