Update.
[glibc.git] / scripts / rellns-sh
blob890f4eea3a40190a5c6385dc6a326cd2d0f48b04
1 #! /bin/sh
2 # rellns-sh - Simplified ln program to generate relative symbolic link.
3 # Copyright (C) 1996, 1997 Free Software Foundation, Inc.
4 # Written by Ulrich Drepper <drepper@cygnus.com>, October 1996
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2, or (at your option)
9 # any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 if test $# -ne 2; then
21 echo "Usage: rellns SOURCE DEST" >&2
22 exit 1
25 # Make both paths absolute.
26 if test -d $1; then
27 to=`cd $1 && /bin/pwd`
28 else
29 temp=`echo $1 | sed 's%/*[^/]*$%%'`
30 if test -z "$temp"; then
31 to=`/bin/pwd`
32 else
33 to=`cd $temp && /bin/pwd`
35 to="$to/`echo $1 | sed 's%.*/\([^/][^/]*\)$%\1%'`"
37 to=`echo $to | sed 's%^/%%'`
39 if test -d $2; then
40 from=`echo $2 | sed 's%/*$%%'`
41 else
42 from=`echo $2 | sed 's%/*[^/]*$%%'`
45 if test -z "$from"; then
46 from=`/bin/pwd | sed 's%^/%%'`
47 else
48 from=`cd $from && /bin/pwd | sed 's%^/%%'`
51 while test -n "$to" && test -n "$from"; do
52 preto=`echo $to | sed 's%^\([^/]*\)/.*%\1%'`
53 prefrom=`echo $from | sed 's%^\([^/]*\)/.*%\1%'`
55 test "$preto" != "$prefrom" && break
57 to=`echo $to | sed 's%^[^/]*/*\(.*\)$%\1%'`
58 from=`echo $from | sed 's%^[^/]*/*\(.*\)$%\1%'`
59 done
61 while test -n "$from"; do
62 rfrom="../$rfrom"
63 from=`echo $from | sed 's%^[^/]*/*%%'`
64 done
66 ln -s $rfrom$to $2