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#! /bin/sh
# rellns-sh - Simplified ln program to generate relative symbolic link.
# Copyright (C) 1996 Free Software Foundation, Inc.
# Written by Ulrich Drepper <drepper@cygnus.com>, October 1996
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
if test $# -ne 2; then
echo "Usage: rellns SOURCE DEST"
exit 1
fi
case $1 in
/*)
# Make both paths absolute.
to=`echo $1 | sed 's%^/%%'`
if test -d $2; then
fromname=.
from=`echo $2 | sed 's%/$%%' | sed 's%^/%%'`
else
fromname=`echo $2 | sed 's%.*/\([^/]*\)$%\1%'`
from=`echo $2 | sed "s%/*$fromname$%%" | sed 's%^/%%'`
fi
case $from in
/*) ;;
?*) from=`cd $from && pwd | sed 's%^/%%'` ;;
*) from=`pwd | sed 's%^/%%'` ;;
esac
while test -n "$to" && test -n "$from"; do
preto=`echo $to | sed 's%^\([^/]*\)/.*%\1%'`
prefrom=`echo $from | sed 's%^\([^/]*\)/.*%\1%'`
test "$preto" != "$prefrom" && break
to=`echo $to | sed 's%^[^/]*/\(.*\)$%\1%'`
from=`echo $from | sed 's%^[^/]*/\(.*\)$%\1%'`
done
while test -n "$from"; do
rfrom="../$rfrom"
from=`echo $from | sed 's%^[^/]*/*%%'`
done
ln -s $rfrom$to $2
;;
*)
# Nothing to do, the path is already relative.
ln -s $1 $2
;;
esac
exit 0
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