#! /bin/sh
# ***************************************************************************
# *                                                                         *
# *   Copyright (C) 2008-2011 Robert Hogan <robert@roberthogan.net>         *
# *                                                                         *
# *   This program 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 2 of the License, or     *
# *   (at your option) any later version.                                   *
# *                                                                         *
# *   This program 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 this program; if not, write to the                         *
# *   Free Software Foundation, Inc.,                                       *
#*   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
# ***************************************************************************
# *                                                                         *
# *   This is a modified version of a source file from the Tor project.     *
# *   Original copyright notice from tsocks source file follows:            *
# ***************************************************************************

# Wrapper script for use of the tsocks(8) transparent socksification library
# See the tsocks(1) and torify(1) manpages.

# Copyright (c) 2004, 2006 Peter Palfrader
# Modified by Jacob Appelbaum <jacob@appelbaum.net> April 16th 2006
# Modified by Marcus Griep <marcus@griep.us> June 16 2009
# May be distributed under the same terms as Tor itself


# Define and ensure we have tsocks
# XXX: what if we don't have which?
TORSOCKS="`which torsocks`"
PROG=
VERBOSE=

usage () {
	echo "Usage: $0 [-hv] <command> [<options>...]"
}

not_found () {
	echo "ERROR: $1 cannot be found in PATH." >&2
	exit 1
}

set_id () {
	echo "ERROR: $1 is set${2}id. usewithtor will not work on a set${2}id executable." >&2
	exit 1
}

# Check for any argument list
if [ "$#" = 0 ]; then
	usage >&2
	exit 1
fi

while [ "$1" ]; do
	case "$1" in
		-h|--h*)
			usage
			exit 0
			;;
		-v|--v*)
			VERBOSE=YesPlease
			shift
			;;
		*)
			break;
	esac
done

if ! which "$1" >/dev/null 2>&1; then
	not_found $1
elif [ -u `which "$1"` ]; then
	set_id $1 u
elif [ -g `which "$1"` ]; then
	set_id $1 g
fi

if [ -x "$TORSOCKS" ]; then
	PROG=torsocks
else
	echo "$0: Unable to find torsocks in PATH." >&2
	echo "    Perhaps you haven't installed it?" >&2
	exit 1
fi

if [ "$VERBOSE" ]; then
	echo "We're armed with the following torsocks: $TORSOCKS"
	echo "We're attempting to use $PROG for all tor action."
fi

if [ "$PROG" = "torsocks" ]; then
	# Define our torsocks config file
	TORSOCKS_CONF_FILE="/etc/torsocks.conf"
	export TORSOCKS_CONF_FILE

	# Check that we've got a torsocks config file
	if [ -r "$TORSOCKS_CONF_FILE" ]; 	then
		exec torsocks "$@"
	else
		echo "$0: Missing torsocks configuration file \"$TORSOCKS_CONF_FILE\" - torsocks will use defaults sensible for Tor." >&2
		exec torsocks "$@"
	fi
fi

# We should have hit an exec. If we get here, we didn't exec
echo "$0: failed to exec $PROG $@" >&2
exit 1