diff options
author | Denys Vlasenko <vda.linux@googlemail.com> | 2009-10-22 02:55:55 +0400 |
---|---|---|
committer | Denys Vlasenko <vda.linux@googlemail.com> | 2009-10-22 02:55:55 +0400 |
commit | 3945bc15340dc9cfa8aae0164f3baf94db6d40c3 (patch) | |
tree | 0899d64dba6f6331df7c321db763c80a5dc40306 /util-linux | |
parent | 481ca9604d1d367c02b9f0799a8c4328232900b5 (diff) |
tune2fs: new applet by Vladimir. Only supports -L LABEL
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>
Diffstat (limited to 'util-linux')
-rw-r--r-- | util-linux/Kbuild | 1 | ||||
-rw-r--r-- | util-linux/tune2fs.c | 71 |
2 files changed, 72 insertions, 0 deletions
diff --git a/util-linux/Kbuild b/util-linux/Kbuild index 7befe0678..dc1d1f21d 100644 --- a/util-linux/Kbuild +++ b/util-linux/Kbuild @@ -38,4 +38,5 @@ lib-$(CONFIG_SCRIPTREPLAY) += scriptreplay.o lib-$(CONFIG_SETARCH) += setarch.o lib-$(CONFIG_SWAPONOFF) += swaponoff.o lib-$(CONFIG_SWITCH_ROOT) += switch_root.o +lib-$(CONFIG_MKFS_EXT2) += tune2fs.o lib-$(CONFIG_UMOUNT) += umount.o diff --git a/util-linux/tune2fs.c b/util-linux/tune2fs.c new file mode 100644 index 000000000..3b8f3d8ef --- /dev/null +++ b/util-linux/tune2fs.c @@ -0,0 +1,71 @@ +/* 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; +} |