Fixed handling of -x non-interactive command runs and hangup of interactive session

demo/client/client.go

@@ -168,6 +168,7 @@ func main() {
 			// exit with outerr == nil
 			_, outerr := io.Copy(conn, os.Stdin)
 			if outerr != nil {
+				log.Println(outerr)
 				if outerr.Error() != "EOF" {
 					fmt.Println(outerr)
 					os.Exit(2)

demo/server/server.go

@@ -121,9 +121,9 @@ func runShellAs(who string, cmd string, interactive bool, conn hkex.Conn) (err e
 
 	//err = c.Run()  // returns when c finishes.
 
+	log.Printf("[%s]\n", cmd)
 	if err != nil {
 		log.Printf("Command finished with error: %v", err)
-		log.Printf("[%s]\n", cmd)
 	}
 	return
 }

hkexnet.go

@@ -314,13 +314,13 @@ func (c Conn) Read(b []byte) (n int, err error) {
 		err = binary.Read(c.c, binary.BigEndian, &hmacIn)
 		// Normal client 'exit' from interactive session will cause
 		// (on server side) err.Error() == "<iface/addr info ...>: use of closed network connection"
-		if err != nil && err.Error() != "EOF" {
+		if err != nil {
 			if !strings.HasSuffix(err.Error(), "use of closed network connection") {
 				log.Println("unexpected Read() err:", err)
 			} else {
 				log.Println("[Client hung up]")
-				return 0, io.EOF
 			}
+			return 0, err
 		}
 
 		//if err != nil {
@@ -424,7 +424,8 @@ func (c Conn) Write(b []byte) (n int, err error) {
 
 	n, err = c.c.Write(wb.Bytes())
 	if err != nil {
-		panic(err)
+		//panic(err)
+		log.Println(err)
 	}
 	return
 }