#! /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

# DP: document -v / -x options

--- ./doc/bash.1~	Wed Jan 20 22:48:04 1999
+++ ./doc/bash.1	Sun Nov 14 13:26:59 1999
@@ -104,6 +104,12 @@
 This option allows the positional parameters to be set
 when invoking an interactive shell.
 .TP
+.B \-v
+Print shell input lines as they are read.
+.TP
+.B \-x
+Print commands and their arguments as they are executed.
+.TP
 .B \-D
 A list of all double-quoted strings preceded by \fB$\fP
 is printed on the standard ouput.