From a5e7de209582e9b37f08b040a562f1ffc4ef3f72 Mon Sep 17 00:00:00 2001
From: Egor <egor@patchysicp.xyz>
Date: Mon, 2 May 2022 14:53:12 +0300
Subject: [PATCH] add SIGINT handler

---
 main.c | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/main.c b/main.c
index 9c37ea7..40bf94d 100644
--- a/main.c
+++ b/main.c
@@ -2,6 +2,28 @@
 #include "net.h"
 #include "irc.h"
 
+#ifndef _WIN32
+#include <signal.h>
+static sig_atomic_t is_running = 1;
+static void on_sigint(int signum)
+{
+	(void)signum;
+	is_running = 0;
+}
+static void set_handler()
+{
+	struct sigaction sa;
+	sa.sa_handler = on_sigint;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = SA_RESETHAND; // only run it once
+	if (sigaction(SIGINT, &sa, NULL) == -1)
+		perror("sigaction");
+}
+#else
+#define is_running 1
+#define set_handler()
+#endif
+
 // Client linked list
 struct client_data *clients[CLIENTS];
 // FDSET List
@@ -18,6 +40,7 @@ fd_set readfds;
 #endif
 
 int main() {
+	set_handler();
 	int opt = 1;
 	SOCKET serverSocketV4 = 0;
 	SOCKET serverSocketV6 = 0;
@@ -119,7 +142,7 @@ int main() {
 
 
 	// Main loop
-	while(1){
+	while(is_running){
 		FD_ZERO(&readfds); 
 		// Add listening SOCKETS to FDSET
 #ifdef SUPPORT_IPV4
@@ -142,6 +165,10 @@ int main() {
 
 		// Wait until activity on sockets
 		if(select(highestFD+1,&readfds,NULL,NULL,NULL) == -1) {
+#ifndef _WIN32
+			if (errno == EINTR)
+				continue;
+#endif
 			net_perror("ERROR SELECT");
 		}
 
-- 
2.56.0