[PATCH 2/2] sanlock: log the signals when the daemon exits

[Federico Simoncelli]

Signed-off-by: Federico Simoncelli <fsimonce(a)redhat.com&gt;
---
 src/main.c |   30 ++++++++++++++++++++++--------
 1 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/src/main.c b/src/main.c
index af12299..2213e31 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1241,8 +1241,9 @@ static int setup_listener(void)
 	return -1;
 }
 
-static void sigterm_handler(int sig GNUC_UNUSED)
+static void sigterm_handler(int sig, siginfo_t *info, void *ctx)
 {
+	log_info("signal %i received from pid %u exiting", sig, info->si_pid);
 	external_shutdown = 1;
 }
 
@@ -1428,6 +1429,25 @@ static void setup_groups(void)
 	free(pgroup);
 }
 
+static void setup_signals(void)
+{
+	struct sigaction act;
+	int rv, i, sig_list[] = { SIGHUP, SIGINT, SIGTERM, 0 };
+
+	memset(&act, 0, sizeof(act));
+
+	act.sa_flags = SA_SIGINFO;
+	act.sa_sigaction = sigterm_handler;
+
+	for (i = 0; sig_list[i] != 0; i++) {
+		rv = sigaction(sig_list[i], &act, NULL);
+		if (rv < 0) {
+			log_error("cannot set the signal handler for: %i", sig_list[i]);
+			exit(EXIT_FAILURE);
+		}
+	}
+}
+
 /*
  * first pipe for daemon to send requests to helper; they are not acknowledged
  * and the daemon does not get any result back for the requests.
@@ -1553,7 +1573,6 @@ static void helper_dead(int ci GNUC_UNUSED)
 
 static int do_daemon(void)
 {
-	struct sigaction act;
 	int fd, rv;
 
 	/* TODO: copy comprehensive daemonization method from libvirtd */
@@ -1584,12 +1603,7 @@ static int do_daemon(void)
 		goto out_logging;
 	strcpy(client[helper_ci].owner_name, "helper");
 
-	memset(&act, 0, sizeof(act));
-	act.sa_handler = sigterm_handler;
-	rv = sigaction(SIGTERM, &act, NULL);
-	if (rv < 0)
-		return rv;
-
+	setup_signals();
 	setup_logging();
 
 	fd = lockfile(SANLK_RUN_DIR, SANLK_LOCKFILE_NAME, com.uid, com.gid);
-- 
1.7.1