1 /* vi: set sw=4 ts=4: */
3 * tune2fs: utility to modify EXT2 filesystem
5 * Busybox'ed (2009) by Vladimir Dronnikov <dronnikov@gmail.com>
7 * Licensed under GPLv2, see file LICENSE in this tarball for details.
11 #include <linux/ext2_fs.h>
12 #include "volume_id/volume_id_internal.h"
15 char BUG_wrong_field_size(void);
16 #define STORE_LE(field, value) \
18 if (sizeof(field) == 4) \
19 field = cpu_to_le32(value); \
20 else if (sizeof(field) == 2) \
21 field = cpu_to_le16(value); \
22 else if (sizeof(field) == 1) \
25 BUG_wrong_field_size(); \
28 #define FETCH_LE32(field) \
29 (sizeof(field) == 4 ? cpu_to_le32(field) : BUG_wrong_field_size())
32 OPT_L = 1 << 0, // label
35 int tune2fs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
36 int tune2fs_main(int argc UNUSED_PARAM, char **argv)
40 struct ext2_super_block *sb;
43 opt_complementary = "=1";
44 opts = getopt32(argv, "L:", &label);
45 argv += optind; // argv[0] -- device
51 fd = xopen(argv[0], O_RDWR);
52 xlseek(fd, 1024, SEEK_SET);
57 //STORE_LE(sb->s_wtime, time(NULL)); - why bother?
59 if (1 /*opts & OPT_L*/)
60 safe_strncpy((char *)sb->s_volume_name, label, sizeof(sb->s_volume_name));
62 xlseek(fd, 1024, SEEK_SET);
65 if (ENABLE_FEATURE_CLEAN_UP) {