rit-vpn-extract.sh

#!/bin/sh
# This script extracts the embedded tarball from the linux anyconnect install script downloaded from vpn.rit.edu
# While it uses the same mechanism to extract the file as the original install script, everything else has been removed.
# 
# Usage: ./rit-vpn-extract.sh "path/to/anyconnect/installer/script"
# If the anyconnect script is in the same folder, just include the name of the file as the argument to this script
# 
# Author: Adrian Edwards

MARKER=$((`grep -an "[B]EGIN\ ARCHIVE" "${1}" | cut -d ":" -f 1` + 1))
MARKER_END=$((`grep -an "[E]ND\ ARCHIVE" "${1}" | cut -d ":" -f 1` - 1))

TARNAME=`date +%N`
TARFILE=./vpninst${TARNAME}.tgz

echo "Extracting installation files to ${TARFILE}..."
# "head --bytes=-1" used to remove '\n' prior to MARKER_END
head -n ${MARKER_END} "${1}" | tail -n +${MARKER} | head --bytes=-1 > ${TARFILE} || exit 1