add pdeathsig

cmd/sshpiperd/cmd_dummy.go

@@ -0,0 +1,8 @@
+//go:build !linux
+
+package main
+
+import "os/exec"
+
+func setPdeathsig(cmd *exec.Cmd) {
+}

cmd/sshpiperd/cmd_linux.go

@@ -0,0 +1,12 @@
+//go:build linux
+
+package main
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func setPdeathsig(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{Pdeathsig: syscall.SIGTERM}
+}

cmd/sshpiperd/main.go

@@ -59,6 +59,7 @@ func createPlugin(args []string) (*plugin.GrpcPlugin, error) {
 	default:
 		cmd := exec.Command(exe)
 		cmd.Args = args
+		setPdeathsig(cmd)
 
 		log.Info("starting child process plugin: ", cmd.Args)