Add killsignal and killtimeout to exec/rtsp

internal/exec/closer.go

@@ -0,0 +1,39 @@
+package exec
+
+import (
+	"errors"
+	"net/url"
+	"os"
+	"os/exec"
+	"syscall"
+	"time"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+)
+
+// closer support custom killsignal with custom killtimeout
+type closer struct {
+	cmd   *exec.Cmd
+	query url.Values
+}
+
+func (c *closer) Close() (err error) {
+	sig := os.Kill
+	if s := c.query.Get("killsignal"); s != "" {
+		sig = syscall.Signal(core.Atoi(s))
+	}
+
+	log.Trace().Msgf("[exec] kill with signal=%d", sig)
+	err = c.cmd.Process.Signal(sig)
+
+	if s := c.query.Get("killtimeout"); s != "" {
+		timeout := time.Duration(core.Atoi(s)) * time.Second
+		timer := time.AfterFunc(timeout, func() {
+			log.Trace().Msgf("[exec] kill after timeout=%s", s)
+			_ = c.cmd.Process.Kill()
+		})
+		defer timer.Stop() // stop timer if Wait ends before timeout
+	}
+
+	return errors.Join(err, c.cmd.Wait())
+}