wmakeCheckPwd

#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
#    \\/     M anipulation  |
#-------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     wmakeCheckPwd
#
# Usage
#     wmakeCheckPwd <dir>
#
# Description
#     Check that the current working directory is the directory <dir>.
#     Exit status 0 when the directories are identical
#
#-------------------------------------------------------------------------------
Script=${0##*/}

unset optQuiet
exec 1>&2 # No stdout, stderr only

usage() {
    [ "$optQuiet" = true ] && exit 1
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE

Usage: $Script [OPTION] dirName

options:
  -q | -quiet   suppress all normal output

  Check that the current working directory is the directory <dir>

  Exit status 0 when the directories are identical
  Exit status 1 on error

USAGE
    exit 1
}


error()
{
    if [ "$optQuiet" != true ]
    then
        echo "$Script error: $1"
        shift
        while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
    fi
    exit 1
}

#------------------------------------------------------------------------------
# Parse arguments and options
#------------------------------------------------------------------------------

while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help)
        usage
        ;;
    -q | -quiet)
        optQuiet=true
        shift
        ;;
    -*)
        usage "Unknown option: '$1'"
        ;;
    *)
        break
        ;;
    esac
done

[ "$#" -eq 1 ] || usage "Incorrect number of arguments"

dirName="$1"

# Simple lexical check against PWD
[ "$PWD" = "$dirName" ] && exit 0

# Check existence of <dir>
[ -d "$dirName" ] || error "Directory does not exist '$dirName'"

# Compare absolute paths, without symlinks
[ "$(cd $dirName 2>/dev/null && pwd -P)" = "$(pwd -P)" ] || \
    error "Current directory is not '$dirName'"


exit 0 # clean exit

#------------------------------------------------------------------------------