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authorGravatar Mike Frysinger <vapier@gentoo.org>2005-06-11 00:40:20 +0000
committerGravatar Mike Frysinger <vapier@gentoo.org>2005-06-11 00:40:20 +0000
commitd5624dcc0da44b78f77eba8e5f504c8447ce70bf (patch)
tree3585cbb15dcbce4ea699530bdfa5f762ce692d54 /e2fsprogs/tune2fs.c
parentcae717e1f6e9615313663558bf7edbba6c758e90 (diff)
downloadbusybox-d5624dcc0da44b78f77eba8e5f504c8447ce70bf.tar.gz
busybox-d5624dcc0da44b78f77eba8e5f504c8447ce70bf.tar.bz2
initial fat tune2fs/findfs/e2label source
Diffstat (limited to 'e2fsprogs/tune2fs.c')
-rw-r--r--e2fsprogs/tune2fs.c776
1 files changed, 776 insertions, 0 deletions
diff --git a/e2fsprogs/tune2fs.c b/e2fsprogs/tune2fs.c
new file mode 100644
index 000000000..e4f904ea0
--- /dev/null
+++ b/e2fsprogs/tune2fs.c
@@ -0,0 +1,776 @@
+/*
+ * tune2fs.c - Change the file system parameters on an ext2 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, 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)
+ */
+
+#include <fcntl.h>
+#include <grp.h>
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#else
+extern char *optarg;
+extern int optind;
+#endif
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "e2fsbb.h"
+#include "ext2fs/ext2_fs.h"
+#include "ext2fs/ext2fs.h"
+#include "uuid/uuid.h"
+#include "e2p/e2p.h"
+#include "ext2fs/jfs_user.h"
+#include "util.h"
+#include "blkid/blkid.h"
+
+static char * device_name;
+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;
+
+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
+};
+
+/*
+ * 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;
+
+ retval = ext2fs_read_inode(fs, ino, &inode);
+ if (retval)
+ bb_error_msg_and_die("Failed to read journal inode");
+ if (ino == EXT2_JOURNAL_INO) {
+ retval = ext2fs_read_bitmaps(fs);
+ if (retval)
+ bb_error_msg_and_die("Failed to read bitmaps");
+ retval = ext2fs_block_iterate(fs, ino, 0, NULL,
+ release_blocks_proc, NULL);
+ if (retval)
+ bb_error_msg_and_die("Failed clearing journal inode");
+ 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)
+ bb_error_msg_and_die("Failed writing journal inode");
+ 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. "
+ "Please run e2fsck before clearing\n"
+ "the has_journal flag.");
+ }
+ 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)
+{
+ unsigned long journal_blocks;
+ errcode_t retval;
+ ext2_filsys jfs;
+ io_manager io_ptr;
+
+ if (fs->super->s_feature_compat &
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
+ bb_error_msg("The filesystem already has a journal");
+ goto err;
+ }
+ if (journal_device) {
+ check_plausibility(journal_device);
+ check_mount(journal_device, 0, "journal");
+ io_ptr = unix_io_manager;
+ retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
+ EXT2_FLAG_JOURNAL_DEV_OK, 0,
+ fs->blocksize, io_ptr, &jfs);
+ if (retval) {
+ bb_error_msg("Failed to open journal on %s", journal_device);
+ goto err;
+ }
+ printf("Creating journal on device %s: ", journal_device);
+ fflush(stdout);
+
+ retval = ext2fs_add_journal_device(fs, jfs);
+ ext2fs_close(jfs);
+ if (retval) {
+ bb_error_msg("Failed to add filesystem to journal on %s", journal_device);
+ goto err;
+ }
+ puts("done");
+ } else if (journal_size) {
+ fputs("Creating journal inode: ", stdout);
+ fflush(stdout);
+ journal_blocks = figure_journal_size(journal_size, fs);
+
+ retval = ext2fs_add_journal_inode(fs, journal_blocks,
+ journal_flags);
+ if (retval)
+ bb_error_msg_and_die("Failed to create journal file");
+ else
+ puts("done");
+ /*
+ * 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;
+
+err:
+ if (journal_device)
+ free(journal_device);
+ exit(1);
+}
+
+
+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 = blkid_get_devname(NULL, argv[1], NULL);
+ if (!device_name)
+ bb_error_msg_and_die("Unable to resolve '%s'", 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++;
+}
+
+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("Couldn't parse date/time specifier: %s", str);
+ }
+ return (mktime(&ts));
+}
+
+static void parse_tune2fs_options(int argc, char **argv)
+{
+ int c;
+ char * tmp;
+ struct group * gr;
+ struct passwd * pw;
+
+ 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':
+ max_mount_count = strtol (optarg, &tmp, 0);
+ if (*tmp || max_mount_count > 16000) {
+ bb_error_msg_and_die("bad mounts count - %s", optarg);
+ }
+ if (max_mount_count == 0)
+ max_mount_count = -1;
+ c_flag = 1;
+ open_flag = EXT2_FLAG_RW;
+ break;
+ case 'C':
+ mount_count = strtoul (optarg, &tmp, 0);
+ if (*tmp || mount_count > 16000) {
+ 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':
+ resgid = strtoul (optarg, &tmp, 0);
+ if (*tmp) {
+ gr = getgrnam (optarg);
+ if (gr == NULL)
+ tmp = optarg;
+ else {
+ resgid = gr->gr_gid;
+ *tmp =0;
+ }
+ }
+ if (*tmp) {
+ bb_error_msg_and_die("bad gid/group name - %s", 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':
+ reserved_ratio = strtoul (optarg, &tmp, 0);
+ if (*tmp || 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':
+ reserved_blocks = strtoul (optarg, &tmp, 0);
+ if (*tmp) {
+ 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':
+ resuid = strtoul (optarg, &tmp, 0);
+ if (*tmp) {
+ pw = getpwnam (optarg);
+ if (pw == NULL)
+ tmp = optarg;
+ else {
+ resuid = pw->pw_uid;
+ *tmp = 0;
+ }
+ }
+ if (*tmp) {
+ bb_error_msg_and_die("bad uid/user name - %s", 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 = blkid_get_devname(NULL, argv[optind], NULL);
+ if (!device_name)
+ bb_error_msg_and_die("Unable to resolve '%s'", argv[optind]);
+}
+
+static void do_findfs(int argc, char **argv)
+{
+ char *dev;
+
+ if ((argc != 2) ||
+ (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5)))
+ bb_show_usage();
+ dev = blkid_get_devname(NULL, argv[1], NULL);
+ if (!dev)
+ bb_error_msg_and_die("Unable to resolve '%s'", argv[1]);
+ puts(dev);
+ exit(0);
+}
+
+int tune2fs_main(int argc, char **argv)
+{
+ errcode_t retval;
+ ext2_filsys fs;
+ struct ext2_super_block *sb;
+ io_manager io_ptr;
+ char *program_name = basename(argv[0]);
+
+ if (strcmp(program_name, "findfs") == 0)
+ do_findfs(argc, argv);
+ if (strcmp(program_name, "e2label") == 0)
+ parse_e2label_options(argc, argv);
+ else
+ parse_tune2fs_options(argc, argv);
+
+ 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);
+ exit(0);
+ }
+ 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 (s_flag == 1) {
+ if (sb->s_feature_ro_compat &
+ EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
+ bb_error_msg("\nThe filesystem already has sparse superblocks\n");
+ 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\n");
+ 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\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 (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);
+ }
+
+ if (l_flag)
+ list_super (sb);
+ return (ext2fs_close (fs) ? 1 : 0);
+}