#! /bin/sh -e

if [ $# -eq 3 -a "$2" = '-d' ]; then
    pdir="-d $3"
elif [ $# -ne 1 ]; then
    echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
    exit 1
fi
case "$1" in
    -patch) patch $pdir -f --no-backup-if-mismatch -p0 < $0;;
    -unpatch) patch $pdir -f --no-backup-if-mismatch -R -p0 < $0;;
    *)
	echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
	exit 1
esac
exit 0

# DP: * Recognize 'exec -l /bin/bash' as login shell.

--- shell.c.orig	2006-03-03 23:15:17.178734888 +0100
+++ shell.c	2006-03-03 23:44:01.556589608 +0100
@@ -1533,9 +1533,10 @@
      any startup files; just try to be more like /bin/sh. */
   shell_name = argv0 ? base_pathname (argv0) : PROGRAM;
 
-  if (*shell_name == '-')
+  if (argv0 && *argv0 == '-')
     {
-      shell_name++;
+      if (*shell_name == '-')
+        shell_name++;
       login_shell++;
     }