From 339f61eee5a7b57955c29c37c88fff9b772b9e0a Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <stephen.hemminger@vyatta.com>
Date: Fri, 9 Apr 2010 10:16:24 -0700
Subject: Don't remove vbash from /etc/shells during upgrade

This postrm script is clone of bash.postrm
---
 debian/vyatta-bash.postrm | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/debian/vyatta-bash.postrm b/debian/vyatta-bash.postrm
index 3d77a51..7039466 100644
--- a/debian/vyatta-bash.postrm
+++ b/debian/vyatta-bash.postrm
@@ -1,8 +1,20 @@
-#! /bin/sh -e
+#! /bin/sh
 
-if [ -x /usr/sbin/remove-shell ]; then
-    /usr/sbin/remove-shell /bin/vbash
-fi
+set -e
+
+case "$1" in
+    upgrade|failed-upgrade|abort-install|abort-upgrade)
+	;;
+    remove|purge|disappear)
+	if [ -x /usr/sbin/remove-shell ] && [ -f /etc/shells ]; then
+	    /usr/sbin/remove-shell /bin/vbash
+	fi
+	;;
+    *)
+        echo "postrm called with unknown argument \`$1'" >&2
+        exit 1
+	;;
+esac
 
 #DEBHELPER#
 
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