Add a not-yet-implemented warning for exec (#51)

README.md

@@ -140,6 +140,7 @@ GLOBAL OPTIONS:
 
 ### master (unreleased)
 
+* Add a not-yet-implemented warning for exec ([#51](https://github.com/moul/ssh2docker/issues/51))
 * Support of `--local-user` option, to allow a specific user to be a local shell ([#44](https://github.com/moul/ssh2docker/issues/44))
 * Kill connection when exiting shell (ctrl+D) ([#43](https://github.com/moul/ssh2docker/issues/43))
 

client.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 	"sync"
 	"syscall"
+	"time"
 
 	"github.com/moul/ssh2docker/vendor/github.com/Sirupsen/logrus"
 	"github.com/moul/ssh2docker/vendor/github.com/kr/pty"
@@ -213,6 +214,14 @@ func (c *Client) HandleChannelRequests(channel ssh.Channel, requests <-chan *ssh
 					once.Do(close)
 				}()
 
+			case "exec":
+				command := string(req.Payload)
+				logrus.Debugf("HandleChannelRequests.req exec: %q", command)
+				ok = false
+
+				fmt.Fprintln(channel, "⚠️  ssh2docker: exec is not yet implemented. https://github.com/moul/ssh2docker/issues/51.")
+				time.Sleep(3 * time.Second)
+
 			case "pty-req":
 				ok = true
 				termLen := req.Payload[3]