From e21dd19168a726f749a00bc96950ce2e09f9eecd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Llu=C3=ADs=20Batlle=20i=20Rossell?= <viric@viric.name>
Date: Wed, 30 Mar 2016 09:45:23 +0200
Subject: [PATCH] Making vm's interactive shell handle the terminal well.

---
 pkgs/build-support/vm/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/build-support/vm/default.nix b/pkgs/build-support/vm/default.nix
index 23f95bd49790..cddca950ef48 100644
--- a/pkgs/build-support/vm/default.nix
+++ b/pkgs/build-support/vm/default.nix
@@ -66,6 +66,7 @@ rec {
       mknod -m 666 ${dev}/random  c 1 8
       mknod -m 666 ${dev}/urandom c 1 9
       mknod -m 666 ${dev}/tty     c 5 0
+      mknod -m 666 ${dev}/ttyS0   c 4 64
       mknod ${dev}/rtc     c 254 0
       . /sys/class/block/${hd}/uevent
       mknod ${dev}/${hd} b $MAJOR $MINOR
@@ -208,7 +209,7 @@ rec {
       export PATH=/bin:/usr/bin:${coreutils}/bin
       echo "Starting interactive shell..."
       echo "(To run the original builder: \$origBuilder \$origArgs)"
-      exec ${bash}/bin/sh
+      exec ${busybox}/bin/setsid ${bashInteractive}/bin/bash < /dev/ttyS0 &> /dev/ttyS0
     fi
   '';