mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
3945bc1534
function old new delta tune2fs_main - 165 +165 packed_usage 26692 26702 +10 applet_names 2148 2156 +8 applet_main 1264 1268 +4 applet_nameofs 632 634 +2 applet_install_loc 158 159 +1 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 5/0 up/down: 190/0) Total: 190 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* tune2fs: utility to modify EXT2 filesystem
|
|
*
|
|
* Busybox'ed (2009) by Vladimir Dronnikov <dronnikov@gmail.com>
|
|
*
|
|
* Licensed under GPLv2, see file LICENSE in this tarball for details.
|
|
*/
|
|
#include "libbb.h"
|
|
#include <linux/fs.h>
|
|
#include <linux/ext2_fs.h>
|
|
#include "volume_id/volume_id_internal.h"
|
|
|
|
// storage helpers
|
|
char BUG_wrong_field_size(void);
|
|
#define STORE_LE(field, value) \
|
|
do { \
|
|
if (sizeof(field) == 4) \
|
|
field = cpu_to_le32(value); \
|
|
else if (sizeof(field) == 2) \
|
|
field = cpu_to_le16(value); \
|
|
else if (sizeof(field) == 1) \
|
|
field = (value); \
|
|
else \
|
|
BUG_wrong_field_size(); \
|
|
} while (0)
|
|
|
|
#define FETCH_LE32(field) \
|
|
(sizeof(field) == 4 ? cpu_to_le32(field) : BUG_wrong_field_size())
|
|
|
|
enum {
|
|
OPT_L = 1 << 0, // label
|
|
};
|
|
|
|
int tune2fs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int tune2fs_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
unsigned opts;
|
|
const char *label;
|
|
struct ext2_super_block *sb;
|
|
int fd;
|
|
|
|
opt_complementary = "=1";
|
|
opts = getopt32(argv, "L:", &label);
|
|
argv += optind; // argv[0] -- device
|
|
|
|
if (!opts)
|
|
bb_show_usage();
|
|
|
|
// read superblock
|
|
fd = xopen(argv[0], O_RDWR);
|
|
xlseek(fd, 1024, SEEK_SET);
|
|
sb = xzalloc(1024);
|
|
xread(fd, sb, 1024);
|
|
|
|
// mangle superblock
|
|
//STORE_LE(sb->s_wtime, time(NULL)); - why bother?
|
|
// set the label
|
|
if (1 /*opts & OPT_L*/)
|
|
safe_strncpy((char *)sb->s_volume_name, label, sizeof(sb->s_volume_name));
|
|
// write superblock
|
|
xlseek(fd, 1024, SEEK_SET);
|
|
xwrite(fd, sb, 1024);
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
free(sb);
|
|
}
|
|
|
|
xclose(fd);
|
|
return EXIT_SUCCESS;
|
|
}
|