#! /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 -p1 < $0;;
    -unpatch) patch $pdir -f --no-backup-if-mismatch -R -p1 < $0;;
    *)
	echo >&2 "`basename $0`: script expects -patch|-unpatch as argument"
	exit 1
esac
exit 0

--- bash/doc/bashref.texi~	2005-10-03 15:07:21.000000000 -0400
+++ bash/doc/bashref.texi	2006-07-12 21:26:57.000000000 -0400
@@ -2030,6 +2030,9 @@
 care, as they may conflict with file descriptors the shell uses
 internally.
 
+Note that the @code{exec} builtin command can make redirections take
+effect in the current shell.
+
 @subsection Redirecting Input
 Redirection of input causes the file whose name results from
 the expansion of @var{word}