[PATCH] rfkill: stop execution when rfkill device cannot be opened

[Sami Kerola <kerolasa@xxxxxx>]

Without this two error messages are printed when rfkill device
cannot be opened.

    $ rfkill
    rfkill: cannot open /dev/rfkill: No such file or directory
    rfkill: cannot read /dev/rfkill: Bad file descriptor

Signed-off-by: Sami Kerola <kerolasa@xxxxxx>
---
 sys-utils/rfkill.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys-utils/rfkill.c b/sys-utils/rfkill.c
index b00bf753e..73fb4bab4 100644
--- a/sys-utils/rfkill.c
+++ b/sys-utils/rfkill.c
@@ -420,6 +420,8 @@ static int rfkill_list_old(const char *param)
 	}
 
 	fd = rfkill_ro_open(1);
+	if (fd < 0)
+		return -errno;
 
 	while (1) {
 		rc = rfkill_read_event(fd, &event);
@@ -492,6 +494,8 @@ static int rfkill_list_fill(struct control const *ctrl, const char *param)
 	}
 
 	fd = rfkill_ro_open(1);
+	if (fd < 0)
+		return -errno;
 
 	while (1) {
 		rc = rfkill_read_event(fd, &event);
-- 
2.29.0