* 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>
*
* 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
*
* 1999-04-17 Dave Cinege...Rewrote -t auto. Fixed ro mtab.
*
- * 1999-10-07 Erik Andersen <andersen@lineo.com>, <andersee@debian.org>.
+ * 1999-10-07 Erik Andersen <andersen@codepoet.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
+ * 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
+ * 1999-11-06 mtab support is back - andersee
*
* 2000-01-12 Ben Collins <bcollins@debian.org>, Borrowed utils-linux's
* mount to add loop support.
* 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.
- *
+ * mtab updating and stale entries. Removed 'remount' default.
+ *
*/
#include <limits.h>
#include <mntent.h>
#include <ctype.h>
#include "busybox.h"
-#if defined CONFIG_FEATURE_USE_DEVPS_PATCH
-# include <linux/devmtab.h> /* For Erik's nifty devmtab device driver */
+
+#ifdef CONFIG_NFSMOUNT
+#if 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
#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 */
+ 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 */
+ MS_MOVE = 8192, /* Use the new linux 2.4.x "mount --move" feature */
};
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 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 */
+extern int sysfs(int option, unsigned int fs_index, char *buf);
struct mount_options {
const char *name;
{"async", ~MS_SYNCHRONOUS, 0},
{"atime", ~0, ~MS_NOATIME},
{"defaults", ~0, 0},
+ {"noauto", ~0, 0},
{"dev", ~MS_NODEV, 0},
{"diratime", ~0, ~MS_NODIRATIME},
{"exec", ~MS_NOEXEC, 0},
{"suid", ~MS_NOSUID, 0},
{"sync", ~0, MS_SYNCHRONOUS},
{"bind", ~0, MS_BIND},
+ {"move", ~0, MS_MOVE},
{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)
+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 CONFIG_FEATURE_MOUNT_LOOP
char *lofile = NULL;
#endif
- if (fakeIt == FALSE)
- {
+ if (!fakeIt) {
#if defined CONFIG_FEATURE_MOUNT_LOOP
- if (use_loop==TRUE) {
+ 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");
+ bb_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");
+ bb_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");
+ bb_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);
+ bb_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)
+ 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 (status == 0 || fakeIt == TRUE) {
#if defined CONFIG_FEATURE_MTAB_SUPPORT
- if (useMtab == TRUE) {
- erase_mtab(specialfile); // Clean any stale entries
+ if (useMtab) {
+ erase_mtab(specialfile); /* Clean any stale entries */
write_mtab(specialfile, dir, filesystemtype, flags, mtab_opts);
}
#endif
#endif
if (errno == EPERM) {
- error_msg_and_die("permission denied. Are you root?");
+ bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
}
return (FALSE);
}
+static void paste_str(char **s1, const char *s2)
+{
+ *s1 = xrealloc(*s1, strlen(*s1) + strlen(s2) + 1);
+ strcat(*s1, s2);
+}
/* Seperate standard mount options from the nonstandard string options */
-static void
-parse_mount_options(char *options, int *flags, char *strflags)
+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)
+ if (comma) {
*comma = '\0';
+ }
while (f->name != 0) {
if (strcasecmp(f->name, options) == 0) {
f++;
}
#if defined CONFIG_FEATURE_MOUNT_LOOP
- if (gotone == FALSE && !strcasecmp("loop", options)) { /* loop device support */
+ if (!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) {
+ if (**strflags) {
+ /* have previous parsed options */
+ paste_str(strflags, ",");
+ }
+ paste_str(strflags, options);
}
- if (gotone == FALSE)
- strcat(strflags, options);
if (comma) {
*comma = ',';
options = ++comma;
}
}
-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)
+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 CONFIG_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;
+ FILE *f;
+ int read_proc = 0;
+
+ f = fopen("/etc/filesystems", "r");
+
+ if (f) {
+ while (fgets(buf, sizeof(buf), f)) {
+ if (*buf == '*') {
+ read_proc = 1;
+ } else if (*buf == '#') {
+ continue;
+ } else {
+ filesystemType = buf;
+
+ /* Add NULL termination to each line */
+ while (*filesystemType && !isspace(*filesystemType)) {
+ filesystemType++;
+ }
+ *filesystemType = '\0';
+
+ filesystemType = buf;
+
+ if (bb_strlen(filesystemType)) {
+ status = do_mount(blockDevice, directory, filesystemType,
+ flags | MS_MGC_VAL, string_flags,
+ useMtab, fakeIt, mtab_opts, mount_all);
+ if (status) {
+ break;
+ }
+ }
- 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;
- }
+ fclose(f);
+ } else {
+ read_proc = 1;
}
- }
-#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
+ if (read_proc && !status) {
- // Add NULL termination to each line
- while (*filesystemType && *filesystemType != '\n')
- filesystemType++;
- *filesystemType = '\0';
+ f = bb_xfopen("/proc/filesystems", "r");
+ while (fgets(buf, sizeof(buf), f) != NULL) {
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;
+ 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) {
+ break;
+ }
+ }
}
+ fclose(f);
}
- fclose(f);
- }
-#endif
- else {
+ } else {
status = do_mount(blockDevice, directory, filesystemType,
- flags | MS_MGC_VAL, string_flags, useMtab,
- fakeIt, mtab_opts, mount_all);
+ 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);
+ if (!status) {
+ if (whineOnErrors) {
+ bb_perror_msg("Mounting %s on %s failed", blockDevice, directory);
}
return (FALSE);
}
return (TRUE);
}
-void show_mounts(void)
+static void show_mounts(char *onlytype)
{
-#if defined CONFIG_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 CONFIG_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");
+ FILE *mountTable = setmntent(bb_path_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);
+
+ if (strcmp(blockDevice, "rootfs") == 0) {
+ continue;
+ } else if (strcmp(blockDevice, "/dev/root") == 0) {
+ blockDevice = find_real_root_device_name();
+ }
+ if (!onlytype || (strcmp(m->mnt_type, onlytype) == 0)) {
+ printf("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
+ m->mnt_type, m->mnt_opts);
}
- printf("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
- m->mnt_type, m->mnt_opts);
#ifdef CONFIG_FEATURE_CLEAN_UP
- if(blockDevice != m->mnt_fsname)
+ if (blockDevice != m->mnt_fsname) {
free(blockDevice);
+ }
#endif
}
endmntent(mountTable);
} else {
- perror_msg_and_die("%s", mtab_file);
+ bb_perror_msg_and_die(bb_path_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;
+ char *string_flags = bb_xstrdup("");
+ char *extra_opts;
int flags = 0;
char *filesystemType = "auto";
+ int got_filesystemType = 0;
char *device = xmalloc(PATH_MAX);
char *directory = xmalloc(PATH_MAX);
+ struct mntent *m = NULL;
int all = FALSE;
int fakeIt = FALSE;
int useMtab = TRUE;
int rc = EXIT_FAILURE;
- int fstabmount = FALSE;
+ FILE *f = 0;
int opt;
/* Parse options */
while ((opt = getopt(argc, argv, "o:rt:wafnv")) > 0) {
switch (opt) {
case 'o':
- parse_mount_options(optarg, &flags, string_flags);
+ parse_mount_options(optarg, &flags, &string_flags);
break;
case 'r':
flags |= MS_RDONLY;
break;
case 't':
filesystemType = optarg;
+ got_filesystemType = 1;
break;
case 'w':
flags &= ~MS_RDONLY;
case 'f':
fakeIt = TRUE;
break;
-#ifdef CONFIG_FEATURE_MTAB_SUPPORT
case 'n':
+#ifdef CONFIG_FEATURE_MTAB_SUPPORT
useMtab = FALSE;
- break;
#endif
+ break;
case 'v':
- break; /* ignore -v */
+ break; /* ignore -v */
}
}
- if (!all && optind == argc)
- show_mounts();
+ if (!all && (optind == argc)) {
+ show_mounts(got_filesystemType ? filesystemType : NULL);
+ }
if (optind < argc) {
/* if device is a filename get its real path */
if (stat(argv[optind], &statbuf) == 0) {
- device = simplify_path(argv[optind]);
+ char *tmp = bb_simplify_path(argv[optind]);
+
+ safe_strncpy(device, tmp, PATH_MAX);
} else {
safe_strncpy(device, argv[optind], PATH_MAX);
}
}
if (optind + 1 < argc)
- directory = simplify_path(argv[optind + 1]);
+ directory = bb_simplify_path(argv[optind + 1]);
- if (all == TRUE || optind + 1 == argc) {
- struct mntent *m = NULL;
- FILE *f = setmntent("/etc/fstab", "r");
- fstabmount = TRUE;
+ if (all || optind + 1 == argc) {
+ f = setmntent("/etc/fstab", "r");
if (f == NULL)
- perror_msg_and_die( "\nCannot read /etc/fstab");
+ bb_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) ) ) {
+ if (!all && (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")) ) ) {
+
+ if (all && ( /* 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, then mount it */
+ {
continue;
}
-
- if (all == TRUE || flags == 0) { // Allow single mount to override fstab flags
+
+ if (all || flags == 0) { /* Allow single mount to override fstab flags */
flags = 0;
- string_flags = string_flags_buf;
- *string_flags = '\0';
- parse_mount_options(m->mnt_opts, &flags, string_flags);
+ string_flags[0] = 0;
+ parse_mount_options(m->mnt_opts, &flags, &string_flags);
}
-
+
strcpy(device, m->mnt_fsname);
strcpy(directory, m->mnt_dir);
- filesystemType = xstrdup(m->mnt_type);
-singlemount:
- string_flags = xstrdup(string_flags);
+ filesystemType = bb_xstrdup(m->mnt_type);
+ singlemount:
+ extra_opts = string_flags;
rc = EXIT_SUCCESS;
#ifdef CONFIG_NFSMOUNT
- if (strchr(device, ':') != NULL)
+ 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");
+ if (nfsmount
+ (device, directory, &flags, &extra_opts, &string_flags,
+ 1)) {
+ bb_perror_msg("nfsmount failed");
rc = EXIT_FAILURE;
}
}
#endif
- if (!mount_one(device, directory, filesystemType, flags,
- string_flags, useMtab, fakeIt, extra_opts, TRUE, all))
+ if (!mount_one
+ (device, directory, filesystemType, flags, string_flags,
+ useMtab, fakeIt, extra_opts, TRUE, all)) {
rc = EXIT_FAILURE;
-
- if (all == FALSE)
+ }
+ if (!all) {
break;
+ }
}
- if (fstabmount == TRUE)
+ if (f) {
endmntent(f);
-
- if (all == FALSE && fstabmount == TRUE && m == NULL)
+ }
+ if (!all && f && m == NULL) {
fprintf(stderr, "Can't find %s in /etc/fstab\n", device);
-
+ }
return rc;
}
-
+
goto singlemount;
}
projects / oweals / busybox.git / blobdiff