1#! /bin/sh
2#
3# fixlinks - make symlinks in the bash source tree so that there is
4#	     exactly one version of any given source file.
5#
6# Copyright (C) 1996-2002 Free Software Foundation, Inc.
7#
8#   This program is free software: you can redistribute it and/or modify
9#   it under the terms of the GNU General Public License as published by
10#   the Free Software Foundation, either version 3 of the License, or
11#   (at your option) any later version.
12#
13#   This program is distributed in the hope that it will be useful,
14#   but WITHOUT ANY WARRANTY; without even the implied warranty of
15#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16#   GNU General Public License for more details.
17#
18#   You should have received a copy of the GNU General Public License
19#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
20#
21
22SRCDIR=.
23while [ $# -gt 0 ]; do
24	case "$1" in
25	-s)	shift; SRCDIR=$1 ;;
26	-u)	unfix=yes ;;
27	-h)	hardlinks=yes ;;
28	-*)	echo "$0: $1: bad option" 1>&2
29		echo "$0: usage: $0 [-hu] [-s srcdir] [linkmap]" 1>&2
30		exit 1;;
31	*)	break ;;
32	esac
33	shift
34done
35
36if [ ! -d $SRCDIR/builtins ]; then
37	echo "$0: must be run with valid -s argument or from source directory" 1>&2
38	exit 1
39fi
40
41if [ $# -eq 0 ]; then
42	linkfile=$SRCDIR/support/SYMLINKS
43else
44	linkfile=$1	
45fi
46
47if [ ! -f "$linkfile" ]; then
48	echo "$0: symlink map file \`$linkfile' does not exist"
49	exit 1
50fi
51
52rm_ltmp=false
53LINKTEMP=`mktemp -t linktmp.XXXXXXXX 2>/dev/null`
54if [ -z "$LINKTEMP" ]; then
55	: ${TMPDIR:=/tmp}
56	LINKTEMP=${TMPDIR}/linktmp.$$
57	rm_ltmp=true
58fi
59
60$rm_ltmp && rm -f ${LINKTEMP}
61# if the user specified hard links, then do that.  otherwise, try to use
62# symlinks if they're present
63if [ -n "$hardlinks" ]; then
64	LN=ln
65elif (ln -s /dev/null ${LINKTEMP}) >/dev/null 2>&1; then
66	LN="ln -s"
67else
68	LN=ln
69fi
70rm -f ${LINKTEMP}
71
72while read name target
73do
74	case "$name" in
75	\#*)	continue;;
76	esac
77
78	rm -f $name
79	case "$unfix" in
80	yes)	dirname=`expr "$name" ':' '^\(.*\)/[^/]*'`
81		[ -z "$dirname" ] && dirname=.
82		cp $dirname/$target $name
83		echo $target copied to $name ;;
84	*)	$LN $target $name ; echo "$name -> $target" ;;
85	esac
86
87done < $linkfile
88
89exit 0
90