close custom commands with SIGQUIT instead of SIGINT (#495)

internal/core/rtsp_server_test.go

@@ -741,7 +741,7 @@ func TestRTSPServerFallback(t *testing.T) {
 func TestRTSPServerRunOnDemand(t *testing.T) {
 	doneFile := filepath.Join(os.TempDir(), "ondemand_done")
 	onDemandFile, err := writeTempFile([]byte(fmt.Sprintf(`#!/bin/sh
-trap 'touch %s; [ -z "$(jobs -p)" ] || kill $(jobs -p)' INT
+trap 'touch %s; [ -z "$(jobs -p)" ] || kill $(jobs -p)' QUIT
 ffmpeg -hide_banner -loglevel error -re -i ../../testimages/ffmpeg/emptyvideo.mkv -c copy -f rtsp rtsp://localhost:$RTSP_PORT/$RTSP_PATH &
 wait
 `, doneFile)))

internal/externalcmd/cmd_unix.go

@@ -5,6 +5,7 @@ package externalcmd
 import (
 	"os"
 	"os/exec"
+	"syscall"
 )
 
 func (e *Cmd) runInner() bool {
@@ -31,7 +32,7 @@ func (e *Cmd) runInner() bool {
 
 	select {
 	case <-e.terminate:
-		cmd.Process.Signal(os.Interrupt)
+		syscall.Kill(cmd.Process.Pid, syscall.SIGQUIT)
 		<-cmdDone
 		return false