diff options
Diffstat (limited to 'util-linux/mount.c')
| -rw-r--r-- | util-linux/mount.c | 230 |
1 files changed, 120 insertions, 110 deletions
diff --git a/util-linux/mount.c b/util-linux/mount.c index df6b3a8..873d27e 100644 --- a/util-linux/mount.c +++ b/util-linux/mount.c @@ -54,24 +54,24 @@ #include <ctype.h> #include "busybox.h" #if defined CONFIG_FEATURE_USE_DEVPS_PATCH -# include <linux/devmtab.h> /* For Erik's nifty devmtab device driver */ +# 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 */ + 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 */ }; @@ -81,13 +81,13 @@ enum { 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 int sysfs(int option, unsigned int fs_index, char *buf); extern const char mtab_file[]; /* Defined in utility.c */ @@ -125,16 +125,16 @@ do_mount(char *specialfile, char *dir, char *filesystemtype, char *mtab_opts, int mount_all) { int status = 0; + #if defined CONFIG_FEATURE_MOUNT_LOOP char *lofile = NULL; #endif - if (! fakeIt) - { + 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(); @@ -152,8 +152,10 @@ do_mount(char *specialfile, char *dir, char *filesystemtype, #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); + 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) @@ -162,11 +164,11 @@ do_mount(char *specialfile, char *dir, char *filesystemtype, /* 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) { - erase_mtab(specialfile); // Clean any stale entries + erase_mtab(specialfile); /* Clean any stale entries */ write_mtab(specialfile, dir, filesystemtype, flags, mtab_opts); } #endif @@ -190,13 +192,12 @@ do_mount(char *specialfile, char *dir, char *filesystemtype, static void paste_str(char **s1, const char *s2) { - *s1 = xrealloc(*s1, strlen(*s1)+strlen(s2)+1); + *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; @@ -217,13 +218,13 @@ parse_mount_options(char *options, int *flags, char **strflags) f++; } #if defined CONFIG_FEATURE_MOUNT_LOOP - if (!strcasecmp("loop", options)) { /* loop device support */ + if (!strcasecmp("loop", options)) { /* loop device support */ use_loop = TRUE; gotone = TRUE; } #endif - if (! gotone) { - if (**strflags) /* have previous parsed options */ + if (!gotone) { + if (**strflags) /* have previous parsed options */ paste_str(strflags, ","); paste_str(strflags, options); } @@ -245,81 +246,85 @@ mount_one(char *blockDevice, char *directory, char *filesystemType, #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 }; + 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; + int i = 0; - filesystemType=buf; + filesystemType = buf; - while(i < num_of_filesystems) { + while (i < num_of_filesystems) { sysfs(2, i++, filesystemType); - for (noauto_fstype = noauto_array; *noauto_fstype; noauto_fstype++) { + 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); + flags | MS_MGC_VAL, string_flags, + useMtab, fakeIt, mtab_opts, mount_all); if (status) break; } } - } + } #else if (strcmp(filesystemType, "auto") == 0) { char buf[255]; FILE *f; int read_proc = 0; - - f = fopen ( "/etc/filesystems", "r" ); - - if ( f ) { - while ( fgets ( buf, sizeof( buf ), f )) { - if ( *buf == '*' ) + + f = fopen("/etc/filesystems", "r"); + + if (f) { + while (fgets(buf, sizeof(buf), f)) { + if (*buf == '*') read_proc = 1; - else if ( *buf == '#' ) + else if (*buf == '#') continue; else { filesystemType = buf; - - // Add NULL termination to each line - while (*filesystemType && !isspace ( *filesystemType )) + + /* Add NULL termination to each line */ + while (*filesystemType && !isspace(*filesystemType)) filesystemType++; *filesystemType = '\0'; filesystemType = buf; - - if ( xstrlen ( filesystemType )) { - status = do_mount(blockDevice, directory, filesystemType, - flags | MS_MGC_VAL, string_flags, - useMtab, fakeIt, mtab_opts, mount_all); + + if (xstrlen(filesystemType)) { + 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); } - if (( !f || read_proc ) && !status ) { + if ((!f || read_proc) && !status) { 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 + 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 + filesystemType++; /* hop past tab */ status = do_mount(blockDevice, directory, filesystemType, flags | MS_MGC_VAL, string_flags, @@ -334,11 +339,11 @@ mount_one(char *blockDevice, char *directory, char *filesystemType, #endif 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) { + if (!status) { if (whineOnErrors) { perror_msg("Mounting %s on %s failed", blockDevice, directory); } @@ -354,34 +359,35 @@ static void show_mounts(char *onlytype) char device[] = "/dev/mtab"; struct k_mntent *mntentlist; - /* open device */ + /* 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)); - + 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++) { - if ( !onlytype || ( strcmp ( mntentlist[i].mnt_type, onlytype ) == 0 )) { - 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); + if (ioctl(fd, DEVMTAB_GET_MOUNTS, mntentlist) < 0) + perror_msg_and_die("\nDEVMTAB_GET_MOUNTS"); + + for (i = 0; i < numfilesystems; i++) { + if (!onlytype || (strcmp(mntentlist[i].mnt_type, onlytype) == 0)) { + 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); + free(mntentlist); close(fd); #endif exit(EXIT_SUCCESS); @@ -393,15 +399,16 @@ static void show_mounts(char *onlytype) while ((m = getmntent(mountTable)) != 0) { char *blockDevice = m->mnt_fsname; + if (strcmp(blockDevice, "/dev/root") == 0) { blockDevice = find_real_root_device_name(blockDevice); } - if ( !onlytype || ( strcmp ( m-> mnt_type, onlytype ) == 0 )) { + 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); } #ifdef CONFIG_FEATURE_CLEAN_UP - if(blockDevice != m->mnt_fsname) + if (blockDevice != m->mnt_fsname) free(blockDevice); #endif } @@ -459,7 +466,7 @@ extern int mount_main(int argc, char **argv) break; #endif case 'v': - break; /* ignore -v */ + break; /* ignore -v */ } } @@ -470,6 +477,7 @@ extern int mount_main(int argc, char **argv) /* if device is a filename get its real path */ if (stat(argv[optind], &statbuf) == 0) { char *tmp = simplify_path(argv[optind]); + safe_strncpy(device, tmp, PATH_MAX); } else { safe_strncpy(device, argv[optind], PATH_MAX); @@ -483,59 +491,61 @@ extern int mount_main(int argc, char **argv) f = setmntent("/etc/fstab", "r"); if (f == NULL) - perror_msg_and_die( "\nCannot read /etc/fstab"); + perror_msg_and_die("\nCannot read /etc/fstab"); while ((m = getmntent(f)) != NULL) { - if (! all && 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 && ( // 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 or nfs, then mount it */ + (strstr(m->mnt_type, "nfs")))) { continue; } - - if (all || flags == 0) { // Allow single mount to override fstab flags + + if (all || flags == 0) { /* Allow single mount to override fstab flags */ flags = 0; 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: + singlemount: extra_opts = string_flags; rc = EXIT_SUCCESS; #ifdef CONFIG_NFSMOUNT if (strchr(device, ':') != NULL) { filesystemType = "nfs"; - if (nfsmount (device, directory, &flags, &extra_opts, - &string_flags, 1)) { + 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)) + string_flags, useMtab, fakeIt, extra_opts, TRUE, + all)) rc = EXIT_FAILURE; - - if (! all) + + if (!all) break; } if (f) endmntent(f); - - if (! all && f && m == NULL) + + if (!all && f && m == NULL) fprintf(stderr, "Can't find %s in /etc/fstab\n", device); - + return rc; } - + goto singlemount; } |