builtin_client: registered event exception handler

Signed-off-by: Daniel Borkmann <borkmann@iogearbox.net>

linux/tools/sensord/builtin_client.c

@@ -7,17 +7,37 @@
 #include <sys/un.h>
 #include <unistd.h>
 #include <stdio.h>
+#include <signal.h>
 
 #include "xutils.h"
 
 #define SOCK_ADDR	"sensordsock"
 
+static void upper_threshold_triggered(int num)
+{
+	if (num != SIGUSR1)
+		return;
+
+	printf("ALERT: upper threshold triggered!\n");
+}
+
+static void lower_threshold_triggered(int num)
+{
+	if (num != SIGUSR2)
+		return;
+
+	printf("ALERT: lower threshold triggered!\n");
+}
+
 int main(void)
 {
 	int sock, ret;
 	struct sockaddr_un saddr;
 	socklen_t slen;
 
+	signal(SIGUSR1, upper_threshold_triggered);
+	signal(SIGUSR2, lower_threshold_triggered);
+
 	sock = socket(AF_UNIX, SOCK_STREAM, 0);
 	if (sock < 0)
 		panic("Cannot create socket!\n");