/* vi: set sw=4 ts=4: */
/*
- * tune2fs.c - Change the file system parameters on an ext2 file system
+ * tune2fs: utility to modify EXT2 filesystem
*
- * Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
- * Laboratoire MASI, Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
+ * Busybox'ed (2009) by Vladimir Dronnikov <dronnikov@gmail.com>
*
- * Copyright 1995, 1996, 1997, 1998, 1999, 2000 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)
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
-
-#include <sys/types.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-#include <getopt.h>
-
-#include "e2fsbb.h"
-#include "ext2fs/ext2_fs.h"
-#include "ext2fs/ext2fs.h"
-#include "uuid/uuid.h"
-#include "e2p/e2p.h"
-#include "ext2fs/kernel-jbd.h"
-#include "util.h"
-#include "blkid/blkid.h"
-
-#include "busybox.h"
-#include "grp_.h"
-#include "pwd_.h"
-
-static char * device_name = NULL;
-static char * new_label, *new_last_mounted, *new_UUID;
-static char * io_options;
-static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
-static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
-static time_t last_check_time;
-static int print_label;
-static int max_mount_count, mount_count, mount_flags;
-static unsigned long interval, reserved_ratio, reserved_blocks;
-static unsigned long resgid, resuid;
-static unsigned short errors;
-static int open_flag;
-static char *features_cmd;
-static char *mntopts_cmd;
-
-static int journal_size, journal_flags;
-static char *journal_device = NULL;
-
-static const char *please_fsck = "Please run e2fsck on the filesystem\n";
-
-static __u32 ok_features[3] = {
- EXT3_FEATURE_COMPAT_HAS_JOURNAL | EXT2_FEATURE_COMPAT_DIR_INDEX,
- EXT2_FEATURE_INCOMPAT_FILETYPE,
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
+#include "libbb.h"
+#include <linux/fs.h>
+#include <linux/ext2_fs.h>
+
+// storage helpers
+char BUG_wrong_field_size(void);
+#define STORE_LE(field, value) \
+do { \
+ if (sizeof(field) == 4) \
+ field = SWAP_LE32(value); \
+ else if (sizeof(field) == 2) \
+ field = SWAP_LE16(value); \
+ else if (sizeof(field) == 1) \
+ field = (value); \
+ else \
+ BUG_wrong_field_size(); \
+} while (0)
+
+#define FETCH_LE32(field) \
+ (sizeof(field) == 4 ? SWAP_LE32(field) : BUG_wrong_field_size())
+
+//usage:#define tune2fs_trivial_usage
+//usage: "[-c MOUNT_CNT] "
+////usage: "[-e errors-behavior] [-g group] "
+//usage: "[-i DAYS] "
+////usage: "[-j] [-J journal-options] [-l] [-s sparse-flag] "
+////usage: "[-m reserved-blocks-percent] [-o [^]mount-options[,...]] "
+////usage: "[-r reserved-blocks-count] [-u user] [-C mount-count] "
+//usage: "[-L LABEL] "
+////usage: "[-M last-mounted-dir] [-O [^]feature[,...]] "
+////usage: "[-T last-check-time] [-U UUID] "
+//usage: "BLOCKDEV"
+//usage:
+//usage:#define tune2fs_full_usage "\n\n"
+//usage: "Adjust filesystem options on ext[23] filesystems"
+
+enum {
+ OPT_L = 1 << 0, // label
+ OPT_c = 1 << 1, // max mount count
+ OPT_i = 1 << 2, // check interval
};
-/*
- * Remove an external journal from the filesystem
- */
-static void remove_journal_device(ext2_filsys fs)
-{
- char *journal_path;
- ext2_filsys jfs;
- char buf[1024];
- journal_superblock_t *jsb;
- int i, nr_users;
- errcode_t retval;
- int commit_remove_journal = 0;
- io_manager io_ptr;
-
- if (f_flag)
- commit_remove_journal = 1; /* force removal even if error */
-
- uuid_unparse(fs->super->s_journal_uuid, buf);
- journal_path = blkid_get_devname(NULL, "UUID", buf);
-
- if (!journal_path) {
- journal_path =
- ext2fs_find_block_device(fs->super->s_journal_dev);
- if (!journal_path)
- return;
- }
-
- io_ptr = unix_io_manager;
- retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
- EXT2_FLAG_JOURNAL_DEV_OK, 0,
- fs->blocksize, io_ptr, &jfs);
- if (retval) {
- bb_error_msg("Failed to open external journal");
- goto no_valid_journal;
- }
- if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
- bb_error_msg("%s is not a journal device", journal_path);
- goto no_valid_journal;
- }
-
- /* Get the journal superblock */
- if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
- bb_error_msg("Failed to read journal superblock");
- goto no_valid_journal;
- }
-
- jsb = (journal_superblock_t *) buf;
- if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
- (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
- bb_error_msg("Journal superblock not found!");
- goto no_valid_journal;
- }
-
- /* Find the filesystem UUID */
- nr_users = ntohl(jsb->s_nr_users);
- for (i=0; i < nr_users; i++) {
- if (memcmp(fs->super->s_uuid,
- &jsb->s_users[i*16], 16) == 0)
- break;
- }
- if (i >= nr_users) {
- bb_error_msg("Filesystem's UUID not found on journal device");
- commit_remove_journal = 1;
- goto no_valid_journal;
- }
- nr_users--;
- for (i=0; i < nr_users; i++)
- memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
- jsb->s_nr_users = htonl(nr_users);
-
- /* Write back the journal superblock */
- if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
- bb_error_msg("Failed to write journal superblock");
- goto no_valid_journal;
- }
-
- commit_remove_journal = 1;
-
-no_valid_journal:
- if (commit_remove_journal == 0)
- bb_error_msg_and_die("Journal NOT removed");
- fs->super->s_journal_dev = 0;
- uuid_clear(fs->super->s_journal_uuid);
- ext2fs_mark_super_dirty(fs);
- puts("Journal removed");
- free(journal_path);
-}
-
-/* Helper function for remove_journal_inode */
-static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
- int blockcnt EXT2FS_ATTR((unused)),
- void *private EXT2FS_ATTR((unused)))
-{
- blk_t block;
- int group;
-
- block = *blocknr;
- ext2fs_unmark_block_bitmap(fs->block_map,block);
- group = ext2fs_group_of_blk(fs, block);
- fs->group_desc[group].bg_free_blocks_count++;
- fs->super->s_free_blocks_count++;
- return 0;
-}
-
-/*
- * Remove the journal inode from the filesystem
- */
-static void remove_journal_inode(ext2_filsys fs)
-{
- struct ext2_inode inode;
- errcode_t retval;
- ino_t ino = fs->super->s_journal_inum;
- char *msg = "to read";
- char *s = "journal inode";
-
- retval = ext2fs_read_inode(fs, ino, &inode);
- if (retval)
- goto REMOVE_JOURNAL_INODE_ERROR;
- if (ino == EXT2_JOURNAL_INO) {
- retval = ext2fs_read_bitmaps(fs);
- if (retval) {
- msg = "to read bitmaps";
- s = "";
- goto REMOVE_JOURNAL_INODE_ERROR;
- }
- retval = ext2fs_block_iterate(fs, ino, 0, NULL,
- release_blocks_proc, NULL);
- if (retval) {
- msg = "clearing";
- goto REMOVE_JOURNAL_INODE_ERROR;
- }
- memset(&inode, 0, sizeof(inode));
- ext2fs_mark_bb_dirty(fs);
- fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
- } else
- inode.i_flags &= ~EXT2_IMMUTABLE_FL;
- retval = ext2fs_write_inode(fs, ino, &inode);
- if (retval) {
- msg = "writing";
-REMOVE_JOURNAL_INODE_ERROR:
- bb_error_msg_and_die("Failed %s %s", msg, s);
- }
- fs->super->s_journal_inum = 0;
- ext2fs_mark_super_dirty(fs);
-}
-
-/*
- * Update the default mount options
- */
-static void update_mntopts(ext2_filsys fs, char *mntopts)
-{
- struct ext2_super_block *sb= fs->super;
-
- if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0))
- bb_error_msg_and_die("Invalid mount option set: %s", mntopts);
- ext2fs_mark_super_dirty(fs);
-}
-
-/*
- * Update the feature set as provided by the user.
- */
-static void update_feature_set(ext2_filsys fs, char *features)
-{
- int sparse, old_sparse, filetype, old_filetype;
- int journal, old_journal, dxdir, old_dxdir;
- struct ext2_super_block *sb= fs->super;
- __u32 old_compat, old_incompat, old_ro_compat;
-
- old_compat = sb->s_feature_compat;
- old_ro_compat = sb->s_feature_ro_compat;
- old_incompat = sb->s_feature_incompat;
-
- old_sparse = sb->s_feature_ro_compat &
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
- old_filetype = sb->s_feature_incompat &
- EXT2_FEATURE_INCOMPAT_FILETYPE;
- old_journal = sb->s_feature_compat &
- EXT3_FEATURE_COMPAT_HAS_JOURNAL;
- old_dxdir = sb->s_feature_compat &
- EXT2_FEATURE_COMPAT_DIR_INDEX;
- if (e2p_edit_feature(features, &sb->s_feature_compat, ok_features))
- bb_error_msg_and_die("Invalid filesystem option set: %s", features);
- sparse = sb->s_feature_ro_compat &
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
- filetype = sb->s_feature_incompat &
- EXT2_FEATURE_INCOMPAT_FILETYPE;
- journal = sb->s_feature_compat &
- EXT3_FEATURE_COMPAT_HAS_JOURNAL;
- dxdir = sb->s_feature_compat &
- EXT2_FEATURE_COMPAT_DIR_INDEX;
- if (old_journal && !journal) {
- if ((mount_flags & EXT2_MF_MOUNTED) &&
- !(mount_flags & EXT2_MF_READONLY)) {
- bb_error_msg_and_die(
- "The has_journal flag may only be "
- "cleared when the filesystem is\n"
- "unmounted or mounted "
- "read-only");
- }
- if (sb->s_feature_incompat &
- EXT3_FEATURE_INCOMPAT_RECOVER) {
- bb_error_msg_and_die(
- "The needs_recovery flag is set. "
- "%s before clearing the has_journal flag.",
- please_fsck);
- }
- if (sb->s_journal_inum) {
- remove_journal_inode(fs);
- }
- if (sb->s_journal_dev) {
- remove_journal_device(fs);
- }
- }
- if (journal && !old_journal) {
- /*
- * If adding a journal flag, let the create journal
- * code below handle creating setting the flag and
- * creating the journal. We supply a default size if
- * necessary.
- */
- if (!journal_size)
- journal_size = -1;
- sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
- }
- if (dxdir && !old_dxdir) {
- if (!sb->s_def_hash_version)
- sb->s_def_hash_version = EXT2_HASH_TEA;
- if (uuid_is_null((unsigned char *) sb->s_hash_seed))
- uuid_generate((unsigned char *) sb->s_hash_seed);
- }
-
- if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
- (sb->s_feature_compat || sb->s_feature_ro_compat ||
- sb->s_feature_incompat))
- ext2fs_update_dynamic_rev(fs);
- if ((sparse != old_sparse) ||
- (filetype != old_filetype)) {
- sb->s_state &= ~EXT2_VALID_FS;
- printf("\n%s\n", please_fsck);
- }
- if ((old_compat != sb->s_feature_compat) ||
- (old_ro_compat != sb->s_feature_ro_compat) ||
- (old_incompat != sb->s_feature_incompat))
- ext2fs_mark_super_dirty(fs);
-}
-
-/*
- * Add a journal to the filesystem.
- */
-static void add_journal(ext2_filsys fs)
-{
- if (fs->super->s_feature_compat &
- EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
- bb_error_msg_and_die("The filesystem already has a journal");
- }
- if (journal_device) {
- make_journal_device(journal_device, fs, 0, 0);
- } else if (journal_size) {
- make_journal_blocks(fs, journal_size, journal_flags, 0);
- /*
- * If the filesystem wasn't mounted, we need to force
- * the block group descriptors out.
- */
- if ((mount_flags & EXT2_MF_MOUNTED) == 0)
- fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
- }
- print_check_message(fs);
- return;
-}
-
-/*
- * Busybox stuff
- */
-static char * x_blkid_get_devname(const char *token)
-{
- char * dev_name;
-
- if (!(dev_name = blkid_get_devname(NULL, token, NULL)))
- bb_error_msg_and_die("Unable to resolve '%s'", token);
- return dev_name;
-}
-
-#ifdef CONFIG_E2LABEL
-static void parse_e2label_options(int argc, char ** argv)
-{
- if ((argc < 2) || (argc > 3))
- bb_show_usage();
- io_options = strchr(argv[1], '?');
- if (io_options)
- *io_options++ = 0;
- device_name = x_blkid_get_devname(argv[1]);
- if (argc == 3) {
- open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK;
- L_flag = 1;
- new_label = argv[2];
- } else
- print_label++;
-}
-#else
-#define parse_e2label_options(x,y)
-#endif
-
-static time_t parse_time(char *str)
-{
- struct tm ts;
-
- if (strcmp(str, "now") == 0) {
- return (time(0));
- }
- memset(&ts, 0, sizeof(ts));
-#ifdef HAVE_STRPTIME
- strptime(str, "%Y%m%d%H%M%S", &ts);
-#else
- sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
- &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
- ts.tm_year -= 1900;
- ts.tm_mon -= 1;
- if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
- ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
- ts.tm_min > 59 || ts.tm_sec > 61)
- ts.tm_mday = 0;
-#endif
- if (ts.tm_mday == 0) {
- bb_error_msg_and_die("Cannot parse date/time specifier: %s", str);
- }
- return (mktime(&ts));
-}
-
-static void parse_tune2fs_options(int argc, char **argv)
+int tune2fs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int tune2fs_main(int argc UNUSED_PARAM, char **argv)
{
- int c;
- char * tmp;
-
- printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
- while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF)
- switch (c)
- {
- case 'c':
- if (safe_strtoi(optarg, &max_mount_count) || max_mount_count > 16000) {
- goto MOUNTS_COUNT_ERROR;
- }
- if (max_mount_count == 0)
- max_mount_count = -1;
- c_flag = 1;
- open_flag = EXT2_FLAG_RW;
- break;
- case 'C':
- if (safe_strtoi(optarg, &mount_count) || mount_count > 16000) {
-MOUNTS_COUNT_ERROR:
- bb_error_msg_and_die("bad mounts count - %s", optarg);
- }
- 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 {
- bb_error_msg_and_die("bad error behavior - %s", optarg);
- }
- e_flag = 1;
- open_flag = EXT2_FLAG_RW;
- break;
- case 'f': /* Force */
- f_flag = 1;
- break;
- case 'g':
- if (safe_strtoul(optarg, &resgid))
- resgid = bb_xgetgrnam(optarg);
- 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)) {
- bb_error_msg_and_die("bad interval - %s", optarg);
- }
- i_flag = 1;
- open_flag = EXT2_FLAG_RW;
- break;
- case 'j':
- if (!journal_size)
- journal_size = -1;
- open_flag = EXT2_FLAG_RW;
- break;
- case 'J':
- parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg);
- 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 |
- EXT2_FLAG_JOURNAL_DEV_OK;
- break;
- case 'm':
- if(safe_strtoul(optarg, &reserved_ratio) || reserved_ratio > 50) {
- bb_error_msg_and_die("bad reserved block ratio - %s", optarg);
- }
- 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 'o':
- if (mntopts_cmd) {
- bb_error_msg_and_die("-o may only be specified once");
- }
- mntopts_cmd = optarg;
- open_flag = EXT2_FLAG_RW;
- break;
-
- case 'O':
- if (features_cmd) {
- bb_error_msg_and_die("-O may only be specified once");
- }
- features_cmd = optarg;
- open_flag = EXT2_FLAG_RW;
- break;
- case 'r':
- if(safe_strtoul(optarg, &reserved_blocks)) {
- bb_error_msg_and_die("bad reserved blocks count - %s", optarg);
- }
- r_flag = 1;
- open_flag = EXT2_FLAG_RW;
- break;
- case 's':
- s_flag = atoi(optarg);
- open_flag = EXT2_FLAG_RW;
- break;
- case 'T':
- T_flag = 1;
- last_check_time = parse_time(optarg);
- open_flag = EXT2_FLAG_RW;
- break;
- case 'u':
- if (safe_strtoul(optarg, &resuid))
- resuid = bb_xgetpwnam(optarg);
- u_flag = 1;
- open_flag = EXT2_FLAG_RW;
- break;
- case 'U':
- new_UUID = optarg;
- U_flag = 1;
- open_flag = EXT2_FLAG_RW |
- EXT2_FLAG_JOURNAL_DEV_OK;
- break;
- default:
- bb_show_usage();
- }
- if (optind < argc - 1 || optind == argc)
- bb_show_usage();
- if (!open_flag && !l_flag)
- bb_show_usage();
- io_options = strchr(argv[optind], '?');
- if (io_options)
- *io_options++ = 0;
- device_name = x_blkid_get_devname(argv[optind]);
-}
+ unsigned opts;
+ const char *label, *str_c, *str_i;
+ struct ext2_super_block *sb;
+ int fd;
-#ifdef CONFIG_FINDFS
-static ATTRIBUTE_NORETURN void do_findfs(int argc, char **argv)
-{
- if ((argc != 2) ||
- (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5)))
+ opt_complementary = "=1";
+ opts = getopt32(argv, "L:c:i:", &label, &str_c, &str_i);
+ if (!opts)
bb_show_usage();
- device_name = x_blkid_get_devname(argv[1]);
- puts(device_name);
- exit(0);
-}
-#else
-#define do_findfs(x, y)
-#endif
+ argv += optind; // argv[0] -- device
-static void tune2fs_clean_up(void)
-{
- if (ENABLE_FEATURE_CLEAN_UP && device_name) free(device_name);
- if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device);
-}
-
-int tune2fs_main(int argc, char **argv)
-{
- errcode_t retval;
- ext2_filsys fs;
- struct ext2_super_block *sb;
- io_manager io_ptr;
+ // read superblock
+ fd = xopen(argv[0], O_RDWR);
+ xlseek(fd, 1024, SEEK_SET);
+ sb = xzalloc(1024);
+ xread(fd, sb, 1024);
- if (ENABLE_FEATURE_CLEAN_UP)
- atexit(tune2fs_clean_up);
+ // mangle superblock
+ //STORE_LE(sb->s_wtime, time(NULL)); - why bother?
- if (ENABLE_FINDFS && (bb_applet_name[0] == 'f')) /* findfs */
- do_findfs(argc, argv); /* no return */
- else if (ENABLE_E2LABEL && (bb_applet_name[0] == 'e')) /* e2label */
- parse_e2label_options(argc, argv);
- else
- parse_tune2fs_options(argc, argv); /* tune2fs */
+ // set the label
+ if (opts & OPT_L)
+ safe_strncpy((char *)sb->s_volume_name, label, sizeof(sb->s_volume_name));
- io_ptr = unix_io_manager;
- retval = ext2fs_open2(device_name, io_options, open_flag,
- 0, 0, io_ptr, &fs);
- if (retval)
- bb_error_msg_and_die("No valid superblock on %s", device_name);
- sb = fs->super;
- if (print_label) {
- /* For e2label emulation */
- printf("%.*s\n", (int) sizeof(sb->s_volume_name),
- sb->s_volume_name);
- return 0;
+ if (opts & OPT_c) {
+ int n = xatoi_range(str_c, -1, 0xfffe);
+ if (n == 0)
+ n = -1;
+ STORE_LE(sb->s_max_mnt_count, (unsigned)n);
}
- retval = ext2fs_check_if_mounted(device_name, &mount_flags);
- if (retval)
- bb_error_msg_and_die("Could not determine if %s is mounted", device_name);
- /* Normally we only need to write out the superblock */
- fs->flags |= EXT2_FLAG_SUPER_ONLY;
- if (c_flag) {
- sb->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) {
- sb->s_mnt_count = mount_count;
- ext2fs_mark_super_dirty(fs);
- printf("Setting current mount count to %d\n", mount_count);
- }
- if (e_flag) {
- sb->s_errors = errors;
- ext2fs_mark_super_dirty(fs);
- printf("Setting error behavior to %d\n", errors);
- }
- if (g_flag) {
- sb->s_def_resgid = resgid;
- ext2fs_mark_super_dirty(fs);
- printf("Setting reserved blocks gid to %lu\n", resgid);
- }
- if (i_flag) {
- sb->s_checkinterval = interval;
- ext2fs_mark_super_dirty(fs);
- printf("Setting interval between check %lu seconds\n", interval);
- }
- if (m_flag) {
- sb->s_r_blocks_count = (sb->s_blocks_count / 100)
- * reserved_ratio;
- ext2fs_mark_super_dirty(fs);
- printf("Setting reserved blocks percentage to %lu (%u blocks)\n",
- reserved_ratio, sb->s_r_blocks_count);
- }
- if (r_flag) {
- if (reserved_blocks >= sb->s_blocks_count/2)
- bb_error_msg_and_die("reserved blocks count is too big (%lu)", reserved_blocks);
- sb->s_r_blocks_count = reserved_blocks;
- ext2fs_mark_super_dirty(fs);
- printf("Setting reserved blocks count to %lu\n", reserved_blocks);
+ if (opts & OPT_i) {
+ unsigned n = xatou_range(str_i, 0, (unsigned)0xffffffff / (24*60*60)) * 24*60*60;
+ STORE_LE(sb->s_checkinterval, n);
}
- if (s_flag == 1) {
- if (sb->s_feature_ro_compat &
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
- bb_error_msg("\nThe filesystem already has sparse superblocks");
- else {
- sb->s_feature_ro_compat |=
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
- sb->s_state &= ~EXT2_VALID_FS;
- ext2fs_mark_super_dirty(fs);
- printf("\nSparse superblock flag set. %s", please_fsck);
- }
- }
- if (s_flag == 0) {
- if (!(sb->s_feature_ro_compat &
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
- bb_error_msg("\nThe filesystem already has sparse superblocks disabled");
- else {
- sb->s_feature_ro_compat &=
- ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
- sb->s_state &= ~EXT2_VALID_FS;
- fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
- ext2fs_mark_super_dirty(fs);
- printf("\nSparse superblock flag cleared. %s", please_fsck);
- }
- }
- if (T_flag) {
- sb->s_lastcheck = last_check_time;
- ext2fs_mark_super_dirty(fs);
- printf("Setting time filesystem last checked to %s\n",
- ctime(&last_check_time));
- }
- if (u_flag) {
- sb->s_def_resuid = resuid;
- ext2fs_mark_super_dirty(fs);
- printf("Setting reserved blocks uid to %lu\n", resuid);
- }
- if (L_flag) {
- if (strlen(new_label) > sizeof(sb->s_volume_name))
- bb_error_msg("Warning: label too long, truncating");
- memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
- safe_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));
- safe_strncpy(sb->s_last_mounted, new_last_mounted,
- sizeof(sb->s_last_mounted));
- ext2fs_mark_super_dirty(fs);
- }
- if (mntopts_cmd)
- update_mntopts(fs, mntopts_cmd);
- if (features_cmd)
- update_feature_set(fs, features_cmd);
- if (journal_size || journal_device)
- add_journal(fs);
- if (U_flag) {
- if ((strcasecmp(new_UUID, "null") == 0) ||
- (strcasecmp(new_UUID, "clear") == 0)) {
- uuid_clear(sb->s_uuid);
- } else if (strcasecmp(new_UUID, "time") == 0) {
- uuid_generate_time(sb->s_uuid);
- } else if (strcasecmp(new_UUID, "random") == 0) {
- uuid_generate(sb->s_uuid);
- } else if (uuid_parse(new_UUID, sb->s_uuid)) {
- bb_error_msg_and_die("Invalid UUID format");
- }
- ext2fs_mark_super_dirty(fs);
+ // write superblock
+ xlseek(fd, 1024, SEEK_SET);
+ xwrite(fd, sb, 1024);
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(sb);
}
- if (l_flag)
- list_super (sb);
- return (ext2fs_close (fs) ? 1 : 0);
+ xclose(fd);
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff