diff options
Diffstat (limited to 'e2fsprogs')
| -rw-r--r-- | e2fsprogs/Config.in | 12 | ||||
| -rw-r--r-- | e2fsprogs/Kbuild | 3 | ||||
| -rw-r--r-- | e2fsprogs/tune2fs.c | 70 |
3 files changed, 78 insertions, 7 deletions
diff --git a/e2fsprogs/Config.in b/e2fsprogs/Config.in index 9a0088a..964d08e 100644 --- a/e2fsprogs/Config.in +++ b/e2fsprogs/Config.in @@ -41,12 +41,12 @@ config LSATTR ### mke2fs is used to create an ext2/ext3 filesystem. The normal compat ### symlinks 'mkfs.ext2' and 'mkfs.ext3' are also provided. -### config TUNE2FS -### bool "tune2fs" -### default n -### help -### tune2fs allows the system administrator to adjust various tunable -### filesystem parameters on Linux ext2/ext3 filesystems. +config TUNE2FS + bool "tune2fs" + default n + help + tune2fs allows the system administrator to adjust various tunable + filesystem parameters on Linux ext2/ext3 filesystems. ### config E2LABEL ### bool "e2label" diff --git a/e2fsprogs/Kbuild b/e2fsprogs/Kbuild index 9f58ce0..0fdc9d2 100644 --- a/e2fsprogs/Kbuild +++ b/e2fsprogs/Kbuild @@ -9,4 +9,5 @@ lib-y:= lib-$(CONFIG_CHATTR) += chattr.o e2fs_lib.o lib-$(CONFIG_LSATTR) += lsattr.o e2fs_lib.o -lib-$(CONFIG_FSCK) += fsck.o +lib-$(CONFIG_FSCK) += fsck.o +lib-$(CONFIG_TUNE2FS) += tune2fs.o diff --git a/e2fsprogs/tune2fs.c b/e2fsprogs/tune2fs.c new file mode 100644 index 0000000..00ede4f --- /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; +} |