--- /dev/null
+/*
+ * setsuper.c --- set a superblock value
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include <fcntl.h>
+#include <utime.h>
+
+#include "debugfs.h"
+
+static struct ext2_super_block set_sb;
+
+struct super_set_info {
+ char *name;
+ void *ptr;
+ int size;
+ errcode_t (*func)(struct super_set_info *info, char *arg);
+};
+
+static errcode_t parse_uint(struct super_set_info *info, char *arg);
+static errcode_t parse_int(struct super_set_info *info, char *arg);
+static errcode_t parse_string(struct super_set_info *info, char *arg);
+
+static struct super_set_info super_fields[] = {
+ { "inodes_count", &set_sb.s_inodes_count, 4, parse_uint },
+ { "blocks_count", &set_sb.s_blocks_count, 4, parse_uint },
+ { "r_blocks_count", &set_sb.s_r_blocks_count, 4, parse_uint },
+ { "free_blocks_count", &set_sb.s_free_blocks_count, 4, parse_uint },
+ { "free_inodes_count", &set_sb.s_free_inodes_count, 4, parse_uint },
+ { "first_data_block", &set_sb.s_first_data_block, 4, parse_uint },
+ { "log_block_size", &set_sb.s_log_block_size, 4, parse_uint },
+ { "log_frag_size", &set_sb.s_log_frag_size, 4, parse_int },
+ { "blocks_per_group", &set_sb.s_blocks_per_group, 4, parse_uint },
+ { "frags_per_group", &set_sb.s_frags_per_group, 4, parse_uint },
+ { "inodes_per_group", &set_sb.s_inodes_per_group, 4, parse_uint },
+ /* s_mtime (time_t) */
+ /* s_wtime (time_t) */
+ { "mnt_count", &set_sb.s_mnt_count, 2, parse_uint },
+ { "max_mnt_count", &set_sb.s_max_mnt_count, 2, parse_int },
+ /* s_magic */
+ { "state", &set_sb.s_state, 2, parse_uint },
+ { "errors", &set_sb.s_errors, 2, parse_uint },
+ { "minor_rev_level", &set_sb.s_minor_rev_level, 2, parse_uint },
+ /* s_lastcheck (time_t) */
+ { "checkinterval", &set_sb.s_checkinterval, 4, parse_uint },
+ { "creator_os", &set_sb.s_creator_os, 4, parse_uint },
+ { "rev_level", &set_sb.s_rev_level, 4, parse_uint },
+ { "def_resuid", &set_sb.s_def_resuid, 2, parse_uint },
+ { "def_resgid", &set_sb.s_def_resgid, 2, parse_uint },
+ { "first_ino", &set_sb.s_first_ino, 4, parse_uint },
+ { "s_inode_size", &set_sb. s_inode_size, 2, parse_uint },
+ { "block_group_nr", &set_sb.s_block_group_nr, 2, parse_uint },
+ { "feature_compat", &set_sb.s_feature_compat, 4, parse_uint },
+ { "feature_incompat", &set_sb.s_feature_incompat, 4, parse_uint },
+ { "feature_ro_compat", &set_sb.s_feature_ro_compat, 4, parse_uint },
+ /* __u8 s_uuid[16]; */
+ { "volume_name", &set_sb.s_volume_name, 16, parse_string },
+ { "last_mounted", &set_sb.s_last_mounted, 64, parse_string },
+ { "algorithm_usage_bitmap", &set_sb.s_algorithm_usage_bitmap,
+ 4, parse_uint },
+ { "prealloc_blocks", &set_sb.s_prealloc_blocks, 1, parse_uint },
+ { "prealloc_dir_blocks", &set_sb.s_prealloc_dir_blocks, 1,
+ parse_uint },
+ /* s_padding1 */
+ /* s_journal_uuid */
+ { "journal_inum", &set_sb.s_journal_inum, 4, parse_uint },
+ { "journal_dev", &set_sb.s_journal_dev, 4, parse_uint },
+ { "last_orphan", &set_sb.s_last_orphan, 4, parse_uint },
+
+ { 0, 0, 0, 0 }
+};
+
+static struct super_set_info *find_field(char *field)
+{
+ struct super_set_info *ss;
+
+ for (ss = super_fields ; ss->name ; ss++) {
+ if (strcmp(ss->name, field) == 0)
+ return ss;
+ }
+ return NULL;
+}
+
+static errcode_t parse_uint(struct super_set_info *info, char *arg)
+{
+ unsigned long num;
+ char *tmp;
+ __u32 *ptr32;
+ __u16 *ptr16;
+ __u8 *ptr8;
+
+ num = strtoul(arg, &tmp, 0);
+ if (*tmp) {
+ fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
+ arg, info->name);
+ return EINVAL;
+ }
+ switch (info->size) {
+ case 4:
+ ptr32 = (__u32 *) info->ptr;
+ *ptr32 = num;
+ break;
+ case 2:
+ ptr16 = (__u16 *) info->ptr;
+ *ptr16 = num;
+ break;
+ case 1:
+ ptr8 = (__u8 *) info->ptr;
+ *ptr8 = num;
+ break;
+ }
+ return 0;
+}
+
+static errcode_t parse_int(struct super_set_info *info, char *arg)
+{
+ long num;
+ char *tmp;
+ __s32 *ptr32;
+ __s16 *ptr16;
+ __s8 *ptr8;
+
+ num = strtol(arg, &tmp, 0);
+ if (*tmp) {
+ fprintf(stderr, "Couldn't parse '%s' for field %s.\n",
+ arg, info->name);
+ return EINVAL;
+ }
+ switch (info->size) {
+ case 4:
+ ptr32 = (__s32 *) info->ptr;
+ *ptr32 = num;
+ break;
+ case 2:
+ ptr16 = (__s16 *) info->ptr;
+ *ptr16 = num;
+ break;
+ case 1:
+ ptr8 = (__s8 *) info->ptr;
+ *ptr8 = num;
+ break;
+ }
+ return 0;
+}
+
+static errcode_t parse_string(struct super_set_info *info, char *arg)
+{
+ char *cp = (char *) info->ptr;
+
+ if (strlen(arg) >= info->size) {
+ fprintf(stderr, "Error maximum size for %s is %d.\n",
+ info->name, info->size);
+ return EINVAL;
+ }
+ strcpy(cp, arg);
+ return 0;
+}
+
+void do_set_super(int argc, char *argv[])
+{
+ char *cp;
+ ino_t parent;
+ char *name;
+ errcode_t retval;
+ static struct super_set_info *ss;
+
+ if (check_fs_open(argv[0]))
+ return;
+
+ if (argc != 3) {
+ com_err(argv[0], 0, "Usage: set_super <field> <value>");
+ return;
+ }
+
+ if (check_fs_read_write(argv[0]))
+ return;
+
+ if ((ss = find_field(argv[1])) == 0) {
+ com_err(argv[0], 0, "invalid field specifier: %s", argv[1]);
+ return;
+ }
+ set_sb = *current_fs->super;
+ if (ss->func(ss, argv[2]) == 0) {
+ *current_fs->super = set_sb;
+ ext2fs_mark_super_dirty(current_fs);
+ }
+}
+
+
+
+