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#!/bin/sh
FILE="$1"
RES="$FILE"
if [ -z "${FILE##/*}" ]; then
true
elif [ "$OSTYPE" = "msys" -a -z "${FILE##[a-zA-Z]:[/\\]*}" ]; then
true
else
RES="$PWD/$FILE"
fi
RES=$RES/
while true; do
nres=`echo "$RES" | sed "s,/[^/][^/]*/\.\./,/,g; s,/\./,/,g"`
test x"$nres" = x"$RES" && break
RES=$nres
done
RES=`echo "$RES" | sed "s,//,/,g; s,/$,,"`
echo $RES #return
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