path: root/cmds-replace.c
diff options
authorQu Wenruo <>2014-04-28 16:37:29 +0800
committerDavid Sterba <>2014-08-22 14:39:30 +0200
commitb81dd800fccc62754d1801a6c118ec7f629b0355 (patch)
tree052c574dbb49414078e451a039a8faf0c88a8a2b /cmds-replace.c
parent24cf4d8c3ee924b474f68514e0167cc2e602a48d (diff)
btrfs-progs: Improve the errno string about open_path_or_dev_mnt()
open_path_or_dev_mnt() is used to on *mounted* btrfs device or mount point, when a unmounted btrfs device is passed, errno is set to EINVAL to info the caller. If ignore the errno and just print "ERROR: can't access '%s'", end users will get confused. This patch will add check for open_path_or_dev_mnt() caller and print more meaningful error message when a unmounted btrfs device path is given. Signed-off-by: Qu Wenruo <> Signed-off-by: David Sterba <>
Diffstat (limited to 'cmds-replace.c')
1 files changed, 7 insertions, 2 deletions
diff --git a/cmds-replace.c b/cmds-replace.c
index 01ab77c9..645dc988 100644
--- a/cmds-replace.c
+++ b/cmds-replace.c
@@ -172,8 +172,13 @@ static int cmd_start_replace(int argc, char **argv)
fdmnt = open_path_or_dev_mnt(path, &dirstream);
if (fdmnt < 0) {
- fprintf(stderr, "ERROR: can't access \"%s\": %s\n",
- path, strerror(errno));
+ if (errno == EINVAL)
+ fprintf(stderr,
+ "ERROR: '%s' is not a mounted btrfs device\n",
+ path);
+ else
+ fprintf(stderr, "ERROR: can't access '%s': %s\n",
+ path, strerror(errno));
goto leave_with_error;