cethcan: ignore SIG{PIPE,HUP,USR1,USR2}

SIGPIPE was causing cethcan to exit prematurely.  (probably due to a http
connection getting closed down.)

The other signals are reasonable for a daemon to _not_ cause an exit.

2 files changed, 9 insertions, 0 deletions

diff --git a/cethcan/cethcan.h b/cethcan/cethcan.h
index 6763006..ab5edde 100644
--- a/cethcan/cethcan.h
+++ b/cethcan/cethcan.h
@@ -18,6 +18,7 @@
 #include <sys/uio.h>
 #include <fcntl.h>
 #include <time.h>
+#include <signal.h>
 #include <assert.h>
 
 #include <event2/event.h>
diff --git a/cethcan/main.c b/cethcan/main.c
index a870ca2..961c543 100644
--- a/cethcan/main.c
+++ b/cethcan/main.c
@@ -8,6 +8,7 @@ int main(int argc, char **argv)
 	const char *cfgfile = "cethcan.json";
 	json_error_t je;
 	json_t *config;
+	struct sigaction sa;
 
 	do {
 		optch = getopt(argc, argv, "c:");
@@ -79,6 +80,13 @@ int main(int argc, char **argv)
 
 	json_decref(config);
 
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = SIG_IGN;
+	sigaction(SIGPIPE, &sa, NULL);
+	sigaction(SIGHUP, &sa, NULL);
+	sigaction(SIGUSR1, &sa, NULL);
+	sigaction(SIGUSR2, &sa, NULL);
+
 	event_base_loop(ev_base, 0);
 	return 0;
 }