[PATCH 2/3] mke2fs: print extra information about existing ext2/3/4 file systems

Theodore Ts'o
2014-05-05T13:04:18Z

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
misc/util.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)

diff --git a/misc/util.c b/misc/util.c
index 15b4ce5..d63e21b 100644
--- a/misc/util.c
+++ b/misc/util.c
@@ -105,6 +105,41 @@ void proceed_question(int delay)
signal(SIGALRM, SIG_IGN);
}

+static void print_ext2_info(const char *device)
+
+{
+ struct ext2_super_block *sb;
+ ext2_filsys fs;
+ errcode_t retval;
+ time_t tm;
+ char buf[80];
+
+ retval = ext2fs_open2(device, 0, 0, 0, 0, unix_io_manager, &fs);
+ if (retval)
+ return;
+ sb = fs->super;
+
+ if (sb->s_mtime) {
+ tm = sb->s_mtime;
+ if (sb->s_last_mounted[0]) {
+ memset(buf, 0, sizeof(buf));
+ strncpy(buf, sb->s_last_mounted,
+ sizeof(sb->s_last_mounted));
+ printf(_("\tlast mounted on %s on %s"), buf,
+ ctime(&tm));
+ } else
+ printf(_("\tlast mounted on %s"), ctime(&tm));
+ } else if (sb->s_mkfs_time) {
+ tm = sb->s_mkfs_time;
+ printf(_("\tcreated on %s"), ctime(&tm));
+ } else if (sb->s_mkfs_time) {
+ tm = sb->s_mtime;
+ printf(_("\tlast modified on %s"), ctime(&tm));
+ }
+ ext2fs_close(fs);
+}
+
+
/*
* return 1 if the device looks plausible, creating the file if necessary
*/
@@ -168,6 +203,8 @@ int check_plausibility(const char *device, int flags, int *ret_is_dev)
else
printf(_("%s contains a %s file system\n"), device,
fs_type);
+ if (strncmp(fs_type, "ext", 3) == 0)
+ print_ext2_info(device);
free(fs_type);
free(fs_label);
return 0;
--
1.9.0