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authorGravatar Denys Vlasenko <vda.linux@googlemail.com>2010-05-09 00:13:40 +0200
committerGravatar Denys Vlasenko <vda.linux@googlemail.com>2010-05-09 00:13:40 +0200
commit6774386d95cec54258f23f69bc287c99e205ebdf (patch)
tree51a81051eb233a15e6107579c8573ecec5b09726 /e2fsprogs/tune2fs.c
parent19afe848eca8d3baf149cd7ed715489403360287 (diff)
downloadbusybox-6774386d95cec54258f23f69bc287c99e205ebdf.tar.gz
busybox-6774386d95cec54258f23f69bc287c99e205ebdf.tar.bz2
tune2fs: move to e2fsprogs
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'e2fsprogs/tune2fs.c')
-rw-r--r--e2fsprogs/tune2fs.c70
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;
+}