From 635802489282cea52220569fed8297d75c98a774 Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Sat, 13 May 2017 20:35:39 +0200
Subject: server: Better SIGINT handling

---
 main.c    |  2 +-
 runloop.c | 20 +++++++++++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/main.c b/main.c
index 5028190..43a24d2 100644
--- a/main.c
+++ b/main.c
@@ -162,6 +162,6 @@ int main(int argc,char **argv){
 	runloop_set_timeout(60*1000000,timeout_callback);
 	runloop_add_fd(sock,server_socket_callback,false);
 	runloop_run();
-	printf("Runloop empty, shutting down\n");
+	printf("Shutting down because runloop stopped\n");
 	db_close();
 }
diff --git a/runloop.c b/runloop.c
index f95975c..6584098 100644
--- a/runloop.c
+++ b/runloop.c
@@ -1,5 +1,8 @@
+#include <stdio.h>
+#include <stdbool.h>
 #include <string.h>
 #include <errno.h>
+#include <signal.h>
 #include <sys/select.h>
 #include <sys/time.h>
 #include "runloop.h"
@@ -18,11 +21,21 @@ static size_t fd_list_len,fd_list_cap;
 static i64 timeout_usecs=0;
 static runloop_callback *timeout_callback=NULL;
 
+static bool sigint_received=false;
+
+static void signal_handler(int sig){
+	if(sig==SIGINT){
+		sigint_received=true;
+	}
+}
+
 __attribute__((constructor))
 static void constructor(void){
 	fd_list_cap=16;
 	fd_list_len=0;
 	fd_list=malloc(fd_list_cap,struct fd_list_item);
+
+	signal(SIGINT,signal_handler);
 }
 
 
@@ -44,6 +57,11 @@ void runloop_add_fd(int fd,runloop_callback *func,bool use_timeout){
 
 void runloop_run(void){
 	while(fd_list_len>0){
+		if(sigint_received){
+			printf("runloop: SIGINT received\n");
+			break;
+		}
+
 		fd_set inset;
 		FD_ZERO(&inset);
 		int maxfd=-1;
@@ -79,7 +97,7 @@ void runloop_run(void){
 			continue;
 		}
 		if(ret<0){
-			if(errno==EINTR)continue;
+			if(errno==EINTR)continue;  // SIGINT goes here
 			die_perror("select");
 		}
 
-- 
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