contrib: alpine: first draft uninstall script

Purpose of script is to restore an Alpine Linux install to its default
state.  Some trace elements of Finit may remain, but critical parts like
reverting back to /bin/busybox as /sbin/init are in place at least.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

contrib/alpine/uninstall.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+if [ "x`id -u`" != "x0" ]; then
+    echo
+    echo "*** This script must run as root"
+    echo
+    exit 1
+fi
+
+read -p "Do you really want to uninstall Finit (y/N)? " yorn
+
+if [ "x$yorn" = "xy" -o "x$yorn" = "xY" ]; then
+    echo
+    echo "*** Removing all Finit files ..."
+    rm -rf /usr/share/doc/finit
+    rm -rf /etc/finit.conf
+    rm -rf /etc/finit.d
+    if [ -e /etc/rc.local ]; then
+	echo "*** Skipping /etc/rc.local, not sure if we installed it ..."
+    fi
+
+    echo "*** Restoring BusyBox as /sbin/init ..."
+    cd /sbin
+    rm init
+    ln -s /bin/busybox init
+    echo "*** Done"
+    echo
+else
+    echo
+    echo "*** Aborting uninstall."
+    echo
+fi