#!/bin/sh
# Copyright 2010 Jon Disnard. All rights reserved.

# Redistribution and use in source and binary forms, with or without modification, are
# permitted provided that the following conditions are met:

#    1. Redistributions of source code must retain the above copyright notice, this list of
#       conditions and the following disclaimer.
#    2. Redistributions in binary form must reproduce the above copyright notice, this list
#       of conditions and the following disclaimer in the documentation and/or other materials
#       provided with the distribution.

# THIS SOFTWARE IS PROVIDED BY Jon Disnard ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# The views and conclusions contained in the software and documentation are those of the
# authors and should not be interpreted as representing official policies, either expressed
# or implied, of Jon Disnard.

OIFS=$IFS
IFS='/'
count=0
for I in $1; do
    if [ x"$I" = x".." ] || [ x"$I" = x"." ]; then
        P="$(pwd)/$1"
    else
        P="$1"
    fi
    break
done
for I in $P; do
    # Resolve relative path punctuation.
    if [ x"$I" = x"." ] || [ -z "$I" ]; then
        continue
    elif [ x"$I" = x".." ]; then
        FOO="${FOO%%/${FOO##*/}}"
        continue
    else
        FOO="${FOO}/${I}"
    fi

    # Dereference symbolic links.
    if [ -h "$FOO" ] && [ -x "/bin/ls" ]; then
        IFS=$OIFS
        set `/bin/ls -l "$FOO"`
        while shift ; do
            if [ "$1" = "->" ]; then
                FOO="$2"
                shift $#
                break
            fi
        done
    fi
done
IFS=$OIFS
echo "$FOO"