| #! /bin/sh |
| # |
| # Copyright 2003 Alexandre Oliva <aoliva@redhat.com> |
| # Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org> |
| # |
| # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| # |
| |
| # This script computes a relative pathname from $1 to $2 |
| # They are assumed to not contain . or .. pathname components, |
| # but if both directories exist and cd/pwd canonicalizes pathnames, |
| # this shouldn't matter. PWD_CMD may be set to some pwd command that does. |
| |
| from=`(cd $1 > /dev/null && ${PWD_CMD-pwd} || echo $1) 2>/dev/null | sed 's,//*,/,g;s,/*$,,'` |
| target=`(cd $2 > /dev/null && ${PWD_CMD-pwd} || echo $2) 2>/dev/null | sed 's,//*,/,g;s,/*$,,'` |
| |
| case $from in /* | "") ;; *) from=`${PWD_CMD-pwd}`/$from ;; esac |
| case $target in /* | "") ;; *) target=`${PWD_CMD-pwd}`/$target ;; esac |
| |
| case $target in |
| "$from" | "$from/"*) |
| dots=`echo $from | sed s,.,.,g` |
| echo $target | sed "s,^$dots/*,,;s,[^/]$,&/," |
| exit 0 |
| ;; |
| esac |
| |
| case $from in |
| "$target/"*) |
| dots=`echo $target | sed s,.,.,g` |
| echo $from/ | sed "s,^$dots/*,,;s,[^/]$,&/,;s,[^/]*/*,../,g;s,[^/]$,&/," |
| exit 0 |
| ;; |
| esac |
| |
| # Without trailing slash, from=/usr/lib and target=/uclibc/lib |
| # mistakenly concludes that prefix=/u |
| #prefix=`echo $from///$target | sed 's,\(\(/[^/]*\)*\).*///\1.*,\1,'` |
| prefix=`echo $from///$target | sed 's,\(\(/[^/]*\)*/\).*///\1.*,\1,'` |
| dots=`echo $prefix | sed s,.,.,g` |
| from=`echo $from | sed "s,^$dots,,"` |
| target=`echo $target | sed "s,^$dots,,"` |
| |
| from=`echo $from | sed 's,[^/][^/]*,..,g;s,.$,&/,'` |
| echo ${from}$target/ |
| |
| exit 0 |