#! /bin/sh

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

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

# taken from Debian's Developer's Reference, 6.4
pathfind() {
	OLDIFS="$IFS"
	IFS=:
	for p in $PATH; do
		if [ -x "$p/$*" ]; then
			IFS="$OLDIFS"
			return 0
		fi
	done
	IFS="$OLDIFS"
	return 1
}

# Check for any argument list
if [ "$#" = 0 ]; then
	echo "Usage: $0 [-hv] <command> [<options>...]" >&2
	exit 1
fi

if [ "$#" = 1 ] && ( [ "$1" = "-h" ] || [ "$1" = "--help" ] ); then
	echo "Usage: $0 [-hv] <command> [<options>...]"
	exit 0
fi

if [ "$1" = "-v" ] || [ "$1" = "--verbose" ]; then
	verbose=1
	shift 1
else
	verbose=0
fi

if pathfind torsocks; then
	! [ "$verbose" -ge 1 ] || echo "Using torsocks as socksifier." >&2

	exec torsocks "$@"
	echo "$0: Failed to exec torsocks $@" >&2
	exit 1

elif pathfind tsocks; then
	! [ "$verbose" -ge 1 ] || echo "Using tsocks as socksifier." >&2

	# Define our tsocks config file
	TSOCKS_CONF_FILE="/etc/tor/tor-tsocks.conf"
	export TSOCKS_CONF_FILE

	# Check that we've got a tsocks config file
	if [ -r "$TSOCKS_CONF_FILE" ]
	then
		echo "WARNING: tsocks is known to leak DNS and UDP data.  If you had torsocks we would use that." >&2
		exec tsocks "$@"
		echo "$0: Failed to exec tsocks $@" >&2
		exit 1
	else
		echo "$0: Missing tsocks configuration file \"$TSOCKS_CONF_FILE\"." >&2
		exit 1
	fi

else
	echo "$0: Can't find either tsocks or torsocks in your PATH. Perhaps you haven't installed either?" >&2
	exit 1
fi