tune2fs: implement -c and -i options

function                                             old     new   delta
tune2fs_main                                         165     256     +91

Signed-off-by: Richard Braun <rbraun@sceen.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 35 insertions, 5 deletions

diff --git a/e2fsprogs/tune2fs.c b/e2fsprogs/tune2fs.c
index 311349fec..75e4f6bcf 100644
--- a/e2fsprogs/tune2fs.c
+++ b/e2fsprogs/tune2fs.c
@@ -27,24 +27,40 @@ do { \
 #define FETCH_LE32(field) \
 	(sizeof(field) == 4 ? SWAP_LE32(field) : BUG_wrong_field_size())
 
+//usage:#define tune2fs_trivial_usage
+//usage:       "[-c MOUNT_CNT] "
+////usage:     "[-e errors-behavior] [-g group] "
+//usage:       "[-i DAYS] "
+////usage:     "[-j] [-J journal-options] [-l] [-s sparse-flag] "
+////usage:     "[-m reserved-blocks-percent] [-o [^]mount-options[,...]] "
+////usage:     "[-r reserved-blocks-count] [-u user] [-C mount-count] "
+//usage:       "[-L LABEL] "
+////usage:     "[-M last-mounted-dir] [-O [^]feature[,...]] "
+////usage:     "[-T last-check-time] [-U UUID] "
+//usage:       "BLOCKDEV"
+//usage:
+//usage:#define tune2fs_full_usage "\n\n"
+//usage:       "Adjust filesystem options on ext[23] filesystems"
+
 enum {
 	OPT_L = 1 << 0,	// label
+	OPT_c = 1 << 1, // max mount count
+	OPT_i = 1 << 2, // check interval
 };
 
 int tune2fs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int tune2fs_main(int argc UNUSED_PARAM, char **argv)
 {
 	unsigned opts;
-	const char *label;
+	const char *label, *str_c, *str_i;
 	struct ext2_super_block *sb;
 	int fd;
 
 	opt_complementary = "=1";
-	opts = getopt32(argv, "L:", &label);
-	argv += optind; // argv[0] -- device
-
+	opts = getopt32(argv, "L:c:i:", &label, &str_c, &str_i);
 	if (!opts)
 		bb_show_usage();
+	argv += optind; // argv[0] -- device
 
 	// read superblock
 	fd = xopen(argv[0], O_RDWR);
@@ -54,9 +70,23 @@ int tune2fs_main(int argc UNUSED_PARAM, char **argv)
 
 	// mangle superblock
 	//STORE_LE(sb->s_wtime, time(NULL)); - why bother?
+
 	// set the label
-	if (1 /*opts & OPT_L*/)
+	if (opts & OPT_L)
 		safe_strncpy((char *)sb->s_volume_name, label, sizeof(sb->s_volume_name));
+
+	if (opts & OPT_c) {
+		int n = xatoi_range(str_c, -1, 0xfffe);
+		if (n == 0)
+			n = -1;
+		STORE_LE(sb->s_max_mnt_count, (unsigned)n);
+	}
+
+	if (opts & OPT_i) {
+		unsigned n = xatou_range(str_i, 0, (unsigned)0xffffffff / (24*60*60)) * 24*60*60;
+		STORE_LE(sb->s_checkinterval, n);
+	}
+
 	// write superblock
 	xlseek(fd, 1024, SEEK_SET);
 	xwrite(fd, sb, 1024);