[RFC PATCH mtd-utils 056/110] ubifs-utils: open_ubi: Set errno if the target is not char device

[Zhihao Cheng]

Set errno if the target is not char device. It will be useful for
fsck to print error message if open_ubi failed.

Signed-off-by: Zhihao Cheng <chengzhihao1 at huawei.com>
---
 ubifs-utils/libubifs/super.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/ubifs-utils/libubifs/super.c b/ubifs-utils/libubifs/super.c
index 1cbbfcac..9fa366f3 100644
--- a/ubifs-utils/libubifs/super.c
+++ b/ubifs-utils/libubifs/super.c
@@ -43,9 +43,14 @@ int open_ubi(struct ubifs_info *c, const char *node)
 {
 	struct stat st;
 
-	if (stat(node, &st) || !S_ISCHR(st.st_mode))
+	if (stat(node, &st))
 		return -1;
 
+	if (!S_ISCHR(st.st_mode)) {
+		errno = ENODEV;
+		return -1;
+	}
+
 	c->libubi = libubi_open();
 	if (!c->libubi)
 		return -1;
-- 
2.13.6