From: Theodore Ts'o Subject: [PATCH 2/3] mke2fs: print extra information about existing ext2/3/4 file systems Date: Mon, 5 May 2014 09:04:03 -0400 Message-ID: <1399295044-24489-2-git-send-email-tytso@mit.edu> References: <1399295044-24489-1-git-send-email-tytso@mit.edu> Cc: Theodore Ts'o To: Ext4 Developers List Return-path: Received: from imap.thunk.org ([74.207.234.97]:49660 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932187AbaEENES (ORCPT ); Mon, 5 May 2014 09:04:18 -0400 In-Reply-To: <1399295044-24489-1-git-send-email-tytso@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: Signed-off-by: "Theodore Ts'o" --- 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