attach: set the terminal size and handle SIGWINCH

Notify conmon when the terminal size changes.  Use the same notification
to set the correct initial size.

Closes: https://github.com/projectatomic/libpod/issues/351

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Closes: #448
Approved by: baude

1 files changed, 9 insertions, 9 deletions

diff --git a/libpod/container_attach.go b/libpod/container_attach.go
index 86bf7ee14..25e8bcdac 100644
--- a/libpod/container_attach.go
+++ b/libpod/container_attach.go
@@ -56,17 +56,17 @@ func (c *Container) attachContainerSocket(resize <-chan remotecommand.TerminalSi
 		term.SetRawTerminal(inputStream.Fd())
 	}
 
-	controlPath := filepath.Join(c.bundlePath(), "ctl")
-	controlFile, err := os.OpenFile(controlPath, unix.O_WRONLY, 0)
-	if err != nil {
-		return errors.Wrapf(err, "failed to open container ctl file")
-	}
-	defer controlFile.Close()
-
 	kubecontainer.HandleResizing(resize, func(size remotecommand.TerminalSize) {
-		logrus.Debugf("Received a resize event: %+v", size)
-		_, err := fmt.Fprintf(controlFile, "%d %d %d\n", 1, size.Height, size.Width)
+		controlPath := filepath.Join(c.bundlePath(), "ctl")
+		controlFile, err := os.OpenFile(controlPath, unix.O_WRONLY, 0)
 		if err != nil {
+			logrus.Debugf("Could not open ctl file: %v", err)
+			return
+		}
+		defer controlFile.Close()
+
+		logrus.Debugf("Received a resize event: %+v", size)
+		if _, err = fmt.Fprintf(controlFile, "%d %d %d\n", 1, size.Height, size.Width); err != nil {
 			logrus.Warnf("Failed to write to control file to resize terminal: %v", err)
 		}
 	})