78 lines
1.9 KiB
Bash
Executable File
78 lines
1.9 KiB
Bash
Executable File
#!/bin/sh
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# rellns-sh - Simplified ln program to generate relative symbolic link.
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# Copyright (C) 1996-2022 Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, see <https://www.gnu.org/licenses/>.
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# With -p, instead of creating the link print the computed relative link
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# name.
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do_print=false
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case $1 in
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-p)
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do_print=true
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shift
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;;
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esac
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if test $# -ne 2; then
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echo "Usage: rellns [-p] SOURCE DEST" >&2
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exit 1
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fi
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# Make both paths absolute.
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if test -d $1; then
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to=`cd $1 && pwd -P`
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else
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temp=`echo $1 | sed 's%/*[^/]*$%%'`
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if test -z "$temp"; then
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to=`pwd -P`
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else
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to=`cd $temp && pwd -P`
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fi
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to="$to/`echo $1 | sed 's%.*/\([^/][^/]*\)$%\1%'`"
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fi
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to=`echo $to | sed 's%^/%%'`
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if test -d $2; then
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from=`echo $2 | sed 's%/*$%%'`
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else
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from=`echo $2 | sed 's%/*[^/]*$%%'`
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fi
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if test -z "$from"; then
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from=`pwd -P | sed 's%^/%%'`
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else
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from=`cd $from && pwd -P | sed 's%^/%%'`
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fi
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while test -n "$to" && test -n "$from"; do
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preto=`echo $to | sed 's%^\([^/]*\)/.*%\1%'`
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prefrom=`echo $from | sed 's%^\([^/]*\)/.*%\1%'`
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test "$preto" != "$prefrom" && break
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to=`echo $to | sed 's%^[^/]*/*\(.*\)$%\1%'`
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from=`echo $from | sed 's%^[^/]*/*\(.*\)$%\1%'`
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done
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while test -n "$from"; do
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rfrom="../$rfrom"
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from=`echo $from | sed 's%^[^/]*/*%%'`
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done
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if $do_print; then
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echo "$rfrom$to"
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else
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ln -s $rfrom$to $2
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fi
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