Suppress error messages from systemctl.

We call systemctl to see if systemd will run mdmon for us.
If it cannot, we run mdmon directly, so we aren't interested
in the error message.
So redirect stderr to /dev/null.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/util.c b/util.c
index 7e2bbad14ed89a3035d0969eab6ad64d204b8612..3d2c3f09ad67bdc75165a50f8523161efb4fdb07 100644 (file)
--- a/util.c
+++ b/util.c
@@ -1745,6 +1745,11 @@ int start_mdmon(char *devnm)
                        else
                                skipped = 0;
 
+               /* Don't want to see error messages from systemctl.
+                * If the service doesn't exist, we start mdmon ourselves.
+                */
+               close(2);
+               open("/dev/null", O_WRONLY);
                snprintf(pathbuf, sizeof(pathbuf), "mdmon@%s.service",
                         devnm);
                status = execl("/usr/bin/systemctl", "systemctl", "start",