| /* |
| * tune2fs.c - Change the file system parameters on |
| * an unmounted second extended file system |
| * |
| * Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr> |
| * Laboratoire MASI, Institut Blaise Pascal |
| * Universite Pierre et Marie Curie (Paris VI) |
| * |
| * Copyright 1995, 1996, 1997 by Theodore Ts'o. |
| * |
| * %Begin-Header% |
| * This file may be redistributed under the terms of the GNU Public |
| * License. |
| * %End-Header% |
| */ |
| |
| /* |
| * History: |
| * 93/06/01 - Creation |
| * 93/10/31 - Added the -c option to change the maximal mount counts |
| * 93/12/14 - Added -l flag to list contents of superblock |
| * M.J.E. Mol (marcel@duteca.et.tudelft.nl) |
| * F.W. ten Wolde (franky@duteca.et.tudelft.nl) |
| * 93/12/29 - Added the -e option to change errors behavior |
| * 94/02/27 - Ported to use the ext2fs library |
| * 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de) |
| */ |
| |
| #include <fcntl.h> |
| #include <grp.h> |
| #ifdef HAVE_GETOPT_H |
| #include <getopt.h> |
| #endif |
| #include <pwd.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| |
| #include <linux/ext2_fs.h> |
| |
| #include "ext2fs/ext2fs.h" |
| #include "et/com_err.h" |
| #include "uuid/uuid.h" |
| #include "e2p/e2p.h" |
| |
| #include "../version.h" |
| |
| const char * program_name = "tune2fs"; |
| char * device_name = NULL; |
| char * new_label = NULL; |
| char * new_last_mounted = NULL; |
| char * new_UUID = NULL; |
| int c_flag = 0; |
| int C_flag = 0; |
| int e_flag = 0; |
| int g_flag = 0; |
| int i_flag = 0; |
| int l_flag = 0; |
| int L_flag = 0; |
| int m_flag = 0; |
| int M_flag = 0; |
| int r_flag = 0; |
| int s_flag = -1; |
| int u_flag = 0; |
| int U_flag = 0; |
| int max_mount_count, mount_count; |
| unsigned long interval; |
| unsigned long reserved_ratio = 0; |
| unsigned long reserved_blocks = 0; |
| unsigned short errors; |
| unsigned long resgid = 0; |
| unsigned long resuid = 0; |
| |
| #ifndef HAVE_STRCASECMP |
| static int strcasecmp (char *s1, char *s2) |
| { |
| while (*s1 && *s2) { |
| int ch1 = *s1++, ch2 = *s2++; |
| if (isupper (ch1)) |
| ch1 = tolower (ch1); |
| if (isupper (ch2)) |
| ch2 = tolower (ch2); |
| if (ch1 != ch2) |
| return ch1 - ch2; |
| } |
| return *s1 ? 1 : *s2 ? -1 : 0; |
| } |
| #endif |
| |
| static void usage(void) |
| { |
| fprintf(stderr, "Usage: %s [-c max-mounts-count] [-e errors-behavior] " |
| "[-g group]\n" |
| "\t[-i interval[d|m|w]] [-l] [-s] [-m reserved-blocks-percent]\n" |
| "\t[-r reserved-blocks-count] [-u user] [-C mount-count]\n" |
| "\t[-L volume-label] [-M last-mounted-dir] [-U UUID] " |
| "device\n", program_name); |
| exit (1); |
| } |
| |
| int main (int argc, char ** argv) |
| { |
| int c; |
| char * tmp; |
| errcode_t retval; |
| ext2_filsys fs; |
| struct ext2fs_sb *sb; |
| struct group * gr; |
| struct passwd * pw; |
| int open_flag = 0; |
| |
| fprintf (stderr, "tune2fs %s, %s for EXT2 FS %s, %s\n", |
| E2FSPROGS_VERSION, E2FSPROGS_DATE, |
| EXT2FS_VERSION, EXT2FS_DATE); |
| if (argc && *argv) |
| program_name = *argv; |
| initialize_ext2_error_table(); |
| while ((c = getopt (argc, argv, "c:e:g:i:lm:r:s:u:C:L:M:U:")) != EOF) |
| switch (c) |
| { |
| case 'c': |
| max_mount_count = strtoul (optarg, &tmp, 0); |
| if (*tmp || max_mount_count > 16000) { |
| com_err (program_name, 0, |
| "bad mounts count - %s", |
| optarg); |
| usage(); |
| } |
| c_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'C': |
| mount_count = strtoul (optarg, &tmp, 0); |
| if (*tmp || mount_count > 16000) { |
| com_err (program_name, 0, |
| "bad mounts count - %s", |
| optarg); |
| usage(); |
| } |
| C_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'e': |
| if (strcmp (optarg, "continue") == 0) |
| errors = EXT2_ERRORS_CONTINUE; |
| else if (strcmp (optarg, "remount-ro") == 0) |
| errors = EXT2_ERRORS_RO; |
| else if (strcmp (optarg, "panic") == 0) |
| errors = EXT2_ERRORS_PANIC; |
| else { |
| com_err (program_name, 0, |
| "bad error behavior - %s", |
| optarg); |
| usage(); |
| } |
| e_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'g': |
| resgid = strtoul (optarg, &tmp, 0); |
| if (*tmp) { |
| gr = getgrnam (optarg); |
| if (gr == NULL) |
| tmp = optarg; |
| else { |
| resgid = gr->gr_gid; |
| *tmp =0; |
| } |
| } |
| if (*tmp) { |
| com_err (program_name, 0, |
| "bad gid/group name - %s", |
| optarg); |
| usage(); |
| } |
| g_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'i': |
| interval = strtoul (optarg, &tmp, 0); |
| switch (*tmp) { |
| case 's': |
| tmp++; |
| break; |
| case '\0': |
| case 'd': |
| case 'D': /* days */ |
| interval *= 86400; |
| if (*tmp != '\0') |
| tmp++; |
| break; |
| case 'm': |
| case 'M': /* months! */ |
| interval *= 86400 * 30; |
| tmp++; |
| break; |
| case 'w': |
| case 'W': /* weeks */ |
| interval *= 86400 * 7; |
| tmp++; |
| break; |
| } |
| if (*tmp || interval > (365 * 86400)) { |
| com_err (program_name, 0, |
| "bad interval - %s", optarg); |
| usage(); |
| } |
| i_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'l': |
| l_flag = 1; |
| break; |
| case 'L': |
| new_label = optarg; |
| L_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'm': |
| reserved_ratio = strtoul (optarg, &tmp, 0); |
| if (*tmp || reserved_ratio > 50) { |
| com_err (program_name, 0, |
| "bad reserved block ratio - %s", |
| optarg); |
| usage(); |
| } |
| m_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'M': |
| new_last_mounted = optarg; |
| M_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'r': |
| reserved_blocks = strtoul (optarg, &tmp, 0); |
| if (*tmp) { |
| com_err (program_name, 0, |
| "bad reserved blocks count - %s", |
| optarg); |
| usage(); |
| } |
| r_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 's': |
| s_flag = atoi(optarg); |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'u': |
| resuid = strtoul (optarg, &tmp, 0); |
| if (*tmp) { |
| pw = getpwnam (optarg); |
| if (pw == NULL) |
| tmp = optarg; |
| else { |
| resuid = pw->pw_uid; |
| *tmp = 0; |
| } |
| } |
| if (*tmp) { |
| com_err (program_name, 0, |
| "bad uid/user name - %s", |
| optarg); |
| usage(); |
| } |
| u_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| case 'U': |
| new_UUID = optarg; |
| U_flag = 1; |
| open_flag = EXT2_FLAG_RW; |
| break; |
| default: |
| usage(); |
| } |
| if (optind < argc - 1 || optind == argc) |
| usage(); |
| if (!open_flag && !l_flag) |
| usage(); |
| device_name = argv[optind]; |
| retval = ext2fs_open (device_name, open_flag, 0, 0, |
| unix_io_manager, &fs); |
| if (retval) { |
| com_err (program_name, retval, "while trying to open %s", |
| device_name); |
| printf("Couldn't find valid filesystem superblock.\n"); |
| exit(1); |
| } |
| sb = (struct ext2fs_sb *) fs->super; |
| |
| if (c_flag) { |
| fs->super->s_max_mnt_count = max_mount_count; |
| ext2fs_mark_super_dirty(fs); |
| printf ("Setting maximal mount count to %d\n", |
| max_mount_count); |
| } |
| if (C_flag) { |
| fs->super->s_mnt_count = mount_count; |
| ext2fs_mark_super_dirty(fs); |
| printf ("Setting current mount count to %d\n", mount_count); |
| } |
| if (e_flag) { |
| fs->super->s_errors = errors; |
| ext2fs_mark_super_dirty(fs); |
| printf ("Setting error behavior to %d\n", errors); |
| } |
| if (g_flag) |
| #ifdef EXT2_DEF_RESGID |
| { |
| fs->super->s_def_resgid = resgid; |
| ext2fs_mark_super_dirty(fs); |
| printf ("Setting reserved blocks gid to %lu\n", resgid); |
| } |
| #else |
| com_err (program_name, 0, |
| "The -g option is not supported by this version -- " |
| "Recompile with a newer kernel"); |
| #endif |
| if (i_flag) { |
| fs->super->s_checkinterval = interval; |
| ext2fs_mark_super_dirty(fs); |
| printf ("Setting interval between check %lu seconds\n", interval); |
| } |
| if (m_flag) { |
| fs->super->s_r_blocks_count = (fs->super->s_blocks_count / 100) |
| * reserved_ratio; |
| ext2fs_mark_super_dirty(fs); |
| printf ("Setting reserved blocks percentage to %lu (%u blocks)\n", |
| reserved_ratio, fs->super->s_r_blocks_count); |
| } |
| if (r_flag) { |
| if (reserved_blocks >= fs->super->s_blocks_count) { |
| com_err (program_name, 0, |
| "reserved blocks count is too big (%ul)", |
| reserved_blocks); |
| exit (1); |
| } |
| fs->super->s_r_blocks_count = reserved_blocks; |
| ext2fs_mark_super_dirty(fs); |
| printf ("Setting reserved blocks count to %lu\n", |
| reserved_blocks); |
| } |
| if (s_flag == 1) { |
| #ifdef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
| if (sb->s_feature_ro_compat & |
| EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) |
| fprintf(stderr, "\nThe filesystem already " |
| " has spare superblocks.\n"); |
| else { |
| sb->s_feature_ro_compat |= |
| EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
| fs->super->s_state &= ~EXT2_VALID_FS; |
| ext2fs_mark_super_dirty(fs); |
| printf("\nSparse superblock flag set. " |
| "Please run e2fsck on the filesystem.\n"); |
| } |
| #else /* !EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */ |
| com_err (program_name, 0, |
| "The -s option is not supported by this version -- " |
| "Recompile with a newer kernel"); |
| #endif /* EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */ |
| } |
| if (s_flag == 0) { |
| #ifdef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
| if (!(sb->s_feature_ro_compat & |
| EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) |
| fprintf(stderr, "\nThe filesystem already " |
| " does not support spare superblocks.\n"); |
| else { |
| sb->s_feature_ro_compat &= |
| ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
| fs->super->s_state &= ~EXT2_VALID_FS; |
| fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; |
| ext2fs_mark_super_dirty(fs); |
| printf("\nSparse superblock flag cleared. " |
| "Please run e2fsck on the filesystem.\n"); |
| } |
| #else /* !EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */ |
| com_err (program_name, 0, |
| "The -s option is not supported by this version -- " |
| "Recompile with a newer kernel"); |
| #endif /* EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */ |
| } |
| |
| if (u_flag) |
| #ifdef EXT2_DEF_RESUID |
| { |
| fs->super->s_def_resuid = resuid; |
| ext2fs_mark_super_dirty(fs); |
| printf ("Setting reserved blocks uid to %lu\n", resuid); |
| } |
| #else |
| com_err (program_name, 0, |
| "The -u option is not supported by this version -- " |
| "Recompile with a newer kernel"); |
| #endif |
| if (L_flag) { |
| if (strlen(new_label) > sizeof(sb->s_volume_name)) |
| fprintf(stderr, "Warning: label too " |
| "long, truncating.\n"); |
| memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name)); |
| strncpy(sb->s_volume_name, new_label, |
| sizeof(sb->s_volume_name)); |
| ext2fs_mark_super_dirty(fs); |
| } |
| if (M_flag) { |
| memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted)); |
| strncpy(sb->s_last_mounted, new_last_mounted, |
| sizeof(sb->s_last_mounted)); |
| ext2fs_mark_super_dirty(fs); |
| } |
| if (U_flag) { |
| if (strcasecmp(new_UUID, "null") == 0) { |
| uuid_clear(sb->s_uuid); |
| } else if (strcasecmp(new_UUID, "random") == 0) { |
| uuid_generate(sb->s_uuid); |
| } else if (uuid_parse(new_UUID, sb->s_uuid)) { |
| com_err(program_name, 0, "Invalid UUID format\n"); |
| exit(1); |
| } |
| ext2fs_mark_super_dirty(fs); |
| } |
| |
| if (l_flag) |
| list_super (fs->super); |
| ext2fs_close (fs); |
| exit (0); |
| } |