From 034643237a9260f12e532bf0459f66234e1f8408 Mon Sep 17 00:00:00 2001
From: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Date: Fri, 24 Jun 2016 17:24:47 +0900
Subject: [PATCH] btrfs-progs: fi show: print error message if no valid Btrfs
 is specified

* Before this patch

 ===============================
 # ./btrfs fi show foo      # "foo" doesn't mean any valid Btrfs
 #                          # no error message
 # echo $?
 1
 ===============================

* After this patch

 ===============================
 # ./btrfs fi show foo
 ERROR: foo is not a valid Btrfs
 #
 # echo $?
 1
 ===============================

Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 cmds-filesystem.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/cmds-filesystem.c b/cmds-filesystem.c
index 88867a3d03..9392a30bd0 100644
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -898,9 +898,10 @@ static int cmd_filesystem_show(int argc, char **argv)
 	list_for_each_entry(fs_devices, &all_uuids, list)
 		print_one_uuid(fs_devices, unit_mode);
 
-	if (search && !found)
+	if (search && !found) {
+		error("not a valid btrfs filesystem: %s", search);
 		ret = 1;
-
+	}
 	while (!list_empty(&all_uuids)) {
 		fs_devices = list_entry(all_uuids.next,
 					struct btrfs_fs_devices, list);