syslogd: Set pipe fd non-blocking in timer backend

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/timer.c

@@ -29,6 +29,7 @@
  */
 
 #include <err.h>
+#include <fcntl.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <time.h>
@@ -179,6 +180,12 @@ int timer_init(void)
 		goto err;
 	}
 
+	rc = fcntl(timer_fd[0], F_GETFL, 0);
+	if (rc != -1) {
+		if (fcntl(timer_fd[0], F_SETFL, rc | O_NONBLOCK) < 0)
+			warn("Failed setting pipe() descriptor non-blocking");
+	}
+
 	rc = socket_register(timer_fd[0], NULL, timer_cb, NULL);
 	if (rc < 0) {
 		warn("socket_register()");