From 9326e6e09a720efeb6080804396e1b29bab6a51e Mon Sep 17 00:00:00 2001
From: Alexander Popov <iiiypuk@fastmail.fm>
Date: Sun, 30 Jul 2023 00:52:44 +0300
Subject: [PATCH] add CTRL+C handler

---
 ~/C/libserialport/listen.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/~/C/libserialport/listen.c b/~/C/libserialport/listen.c
index 3ac3456..3b79f8c 100644
--- a/~/C/libserialport/listen.c
+++ b/~/C/libserialport/listen.c
@@ -2,9 +2,13 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
+#include <signal.h>
 
 /* Helper function for error handling. */
 int check(enum sp_return result);
+void handle_sigint(int sig);
+
+bool INTERRUPT = false;
 
 int main(int argc, char **argv) {
   struct sp_port *serial_port;
@@ -59,9 +63,11 @@ int main(int argc, char **argv) {
   check(sp_set_flowcontrol(serial_port, SP_FLOWCONTROL_NONE));
   puts("Connected.");
 
+  signal(SIGINT, handle_sigint);
+
   /* Reading lines from serial port. */
   bool reading = true;
-  while (reading) {
+  while (reading && !INTERRUPT) {
     int pos = 0;
 
     /* Character-by-character reading. */
@@ -119,3 +125,5 @@ int check(enum sp_return result) {
     return result;
   }
 }
+
+void handle_sigint(int sig) { INTERRUPT = true; }