diff options
author | Eric Andersen <andersen@codepoet.org> | 2001-10-24 09:00:29 +0400 |
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committer | Eric Andersen <andersen@codepoet.org> | 2001-10-24 09:00:29 +0400 |
commit | bdfd0d78bc44e73d693510e70087857785b3b521 (patch) | |
tree | 153a573095afac8d8d0ea857759ecabd77fb28b7 /mount.c | |
parent | 9260fc5552a3ee52eb95823aa6689d52a1ffd33c (diff) |
Major rework of the directory structure and the entire build system.
-Erik
Diffstat (limited to 'mount.c')
-rw-r--r-- | mount.c | 498 |
1 files changed, 0 insertions, 498 deletions
diff --git a/mount.c b/mount.c deleted file mode 100644 index af57a7623..000000000 --- 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; -} |