diff options
author | Denys Vlasenko <vda.linux@googlemail.com> | 2010-05-09 02:13:40 +0400 |
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committer | Denys Vlasenko <vda.linux@googlemail.com> | 2010-05-09 02:13:40 +0400 |
commit | 6774386d95cec54258f23f69bc287c99e205ebdf (patch) | |
tree | 51a81051eb233a15e6107579c8573ecec5b09726 /e2fsprogs/tune2fs.c | |
parent | 19afe848eca8d3baf149cd7ed715489403360287 (diff) |
tune2fs: move to e2fsprogs
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'e2fsprogs/tune2fs.c')
-rw-r--r-- | e2fsprogs/tune2fs.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/e2fsprogs/tune2fs.c b/e2fsprogs/tune2fs.c new file mode 100644 index 000000000..00ede4f1e --- /dev/null +++ b/e2fsprogs/tune2fs.c @@ -0,0 +1,70 @@ +/* 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> + +// storage helpers +char BUG_wrong_field_size(void); +#define STORE_LE(field, value) \ +do { \ + if (sizeof(field) == 4) \ + field = SWAP_LE32(value); \ + else if (sizeof(field) == 2) \ + field = SWAP_LE16(value); \ + else if (sizeof(field) == 1) \ + field = (value); \ + else \ + BUG_wrong_field_size(); \ +} while (0) + +#define FETCH_LE32(field) \ + (sizeof(field) == 4 ? SWAP_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; +} |