#! /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: Document handling of parameters of the test builtin.

--- doc/bashref.texi~	2005-09-09 19:51:31.150172600 +0000
+++ doc/bashref.texi	2005-09-09 19:52:12.693857000 +0000
@@ -5264,6 +5264,10 @@
 Unless otherwise specified, primaries that operate on files follow symbolic
 links and operate on the target of the link, rather than the link itself.
 
+See the description of the @code{test} builtin command (section
+@pxref{Bash Builtins} below) for the handling of parameters
+(i.e. missing parameters).
+
 @table @code
 @item -a @var{file}
 True if @var{file} exists.