tsocks.in

#!/bin/sh
# Wrapper script for use of the tsocks(8) transparent socksification library
#
# There are three forms of usage for this script:
#
# /usr/bin/tsocks program [program arguments...]
#
# This form sets the users LD_PRELOAD environment variable so that tsocks(8)
# will be loaded to socksify the application then executes the specified
# program (with the provided arguments). The following simple example might
# be used to telnet to www.foo.org via a tsocks.conf(5) configured socks server:
#
# /usr/bin/tsocks telnet www.foo.org
#
# The second form allows for tsocks(8) to be switched on and off for a
# session (that is, it adds and removes tsocks from the LD_PRELOAD environment
# variable). This form must be _sourced_ into the user's existing session
# (and will only work with bourne shell users):
#
# . /usr/bin/tsocks on
# telnet www.foo.org
# . /usr/bin/tsocks off
#
# Or
#
# source /usr/bin/tsocks on
# telnet www.foo.org
# source /usr/bin/tsocks off
#
# The third form creates a new shell with LD_PRELOAD set and is achieved
# simply by running the script with no arguments
#
# /usr/bin/tsocks
#
# When finished the user can simply terminate the shell with 'exit'
#
# This script is originally from the debian tsocks package by
# Tamas Szerb <toma@rulez.org>

if [ $# = 0 ] ; then
   echo "$0: insufficient arguments"
   exit
fi

LIBDIR="@libdir@"
LIB_NAME="libtsocks"
SHLIB_EXT="@SHLIB_EXT@"
SHLIB="${LIBDIR}/${LIB_NAME}.${SHLIB_EXT}"

case "$1" in
        on)
                if [ -z "$@LD_PRELOAD@" ]
                        then
                                export @LD_PRELOAD@="${SHLIB}"
                        else
                                echo $@LD_PRELOAD@ | grep -q "${SHLIB}" || \
                                export @LD_PRELOAD@="${SHLIB} $@LD_PRELOAD@"
                fi
                [ `uname` = "Darwin" ] && export DYLD_FORCE_FLAT_NAMESPACE=1
        ;;
        off)
                export @LD_PRELOAD@=`echo -n $@LD_PRELOAD@ | sed 's#@libdir@/libtsocks\.@SHLIB_EXT@ *##'`
                if [ -z "$@LD_PRELOAD@" ]
                        then
                                unset @LD_PRELOAD@
                fi
        ;;
        show|sh)
                echo "@LD_PRELOAD@=\"$@LD_PRELOAD@\""
                [ `uname` = "Darwin" ] && echo "DYLD_FORCE_FLAT_NAMESPACE=\"$DYLD_FORCE_FLAT_NAMESPACE\""
        ;;
        -h|-?)
      echo "$0: Please see tsocks(1) or read comment at top of $0"
   ;;
        *)
                if [ -z "$@LD_PRELOAD@" ]
                then
                        export @LD_PRELOAD@="${SHLIB}"
                else
                        echo $@LD_PRELOAD@ | grep -q "${SHLIB}" || \
                        export @LD_PRELOAD@="${SHLIB} $@LD_PRELOAD@"
                fi

                [ `uname` = "Darwin" ] && export DYLD_FORCE_FLAT_NAMESPACE=1

                if [ $# = 0 ]
                then
                        ${SHELL:-/bin/sh}
                fi

                if [ $# -gt 0 ]
                then
                        exec "$@"
                fi
        ;;
esac

#EOF