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|
#! /bin/bash
#
# Convert relative path to absolute one
#
# Adam Lackorzynski <adam@os.inf.tu-dresden.de>
#
help()
{
echo PWD=\$PWD $0 relpath1 [relpath2 [..]]
exit $1
}
convertpath()
{
relpath=$1
basepath=$PWD
# sanity checks
[ -z "$relpath" -o -z "$basepath" ] && help 1
[ "${basepath#/}" = "${basepath}" ] && help 1
[ "${basepath/\/..\//}" = "${basepath}" ] || help 1
[ "${basepath/\/.\//}" = "${basepath}" ] || help 1
[ "${basepath/%\/../}" = "${basepath}" ] || help 1
[ "${basepath/%\/./}" = "${basepath}" ] || help 1
# remove slashes at the end
while [ "${relpath%/}" != "${relpath}" ];
do relpath="${relpath%/}"; done
# remove double/multi slashes
while [ "${relpath/\/\///}" != "${relpath}" ];
do relpath=${relpath/\/\///}; done
# is relpath relative?
if [ "${relpath#/}" != "${relpath}" ]; then
basepath=''
relpath=${relpath#/}
fi
relpath="$relpath/"
while [ -n "$relpath" ];
do
elem=${relpath%%/*}
relpath=${relpath#*/}
case $elem in
.) # skip
;;
..)
basepath=${basepath%/*}
;;
*)
basepath=$basepath/$elem
;;
esac
done
[ -z "$basepath" ] && basepath=/$basepath
echo $basepath
}
while [ -n "$1" ];
do
convertpath $1
shift
done
exit 0
|
