signal: handle SIGUSR1 as halt

The SIGUSR1 (10) signal sent from BusyBox halt is for halt, so set the
RB_HALT_SYSTEM to event instead of RB_POWER_OFF for system call.

Link: https://github.com/openwrt/procd/pull/25/commits
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/signal.c b/signal.c
index 9974153..7cbbe1a 100644
--- a/signal.c
+++ b/signal.c
@@ -43,6 +43,9 @@ static void signal_shutdown(int signal, siginfo_t *siginfo, void *data)
 		msg = "reboot";
 		break;
 	case SIGUSR1:
+		event = RB_HALT_SYSTEM;
+		msg = "halt";
+		break;
 	case SIGUSR2:
 	case SIGPWR:
 		event = RB_POWER_OFF;