minimodem: handle SIGINT on --rx: close the sa backend and print stats

src/minimodem.c

@@ -258,6 +258,15 @@ benchmarks()
 }
 
 
+static int rx_stop = 0;
+
+void
+rx_stop_sighandler( int sig )
+{
+    rx_stop = 1;
+}
+
+
 void
 version()
 {
@@ -810,8 +819,13 @@ main( int argc, char*argv[] )
 
     float track_amplitude = 0.0;
 
+    signal(SIGINT, rx_stop_sighandler);
+
     while ( 1 ) {
 
+	if ( rx_stop )
+	    break;
+
 	debug_log("advance=%u\n", advance);
 
 	/* Shift the samples in samplebuf by 'advance' samples */
@@ -1148,6 +1162,8 @@ main( int argc, char*argv[] )
 
     } /* end of the main loop */
 
+    signal(SIGINT, SIG_DFL);
+
     if ( carrier ) {
 	if ( !quiet_mode )
 	    report_no_carrier(fskp, sample_rate, bfsk_data_rate,