#!/bin/sh

function unwrap_env () {
    # Setting new break characters
    PRESERVED_IFS=$IFS
    IFS=`echo -en "\n\b"`
    for i in `printenv`; do 
        # Unwrap the GLEXEC_WRAP_ environment variables
        if [ "`expr substr $i 1 12`" == "GLEXEC_WRAP_" ]; then              # substring match and compare to "GLEXEC_WRAP_"
#             D=`echo "$i" | sed -e 's/^GLEXEC_WRAP_\([a-zA-Z0-9_]*\)=\(.*\)/\1=\2/'`
#             E=`echo "$i" | sed -e 's/\(^GLEXEC_WRAP_[a-zA-Z0-9_][a-zA-Z0-9_]*\)=.*/\1/'`
            D=`echo "$i" | expr match "$i"  'GLEXEC_WRAP_\([a-zA-Z0-9_]*=.*\)'`    # Match string excluding the GLEXEC_WRAP_ prefix
            E=`echo "$i" | expr match "$i"  '\(GLEXEC_WRAP_[a-zA-Z0-9_]*\)'`       # Match string including the GLEXEC_WRAP_ prefix

            # Clean the environment option prefixed by GLEXEC_WRAP_
            unset  $E

            # Prevent this list of environment variables which are set by gLExec to be overwritten by the wrapped environment variables
            if [ "$E" == "GLEXEC_WRAP_HOME" ];            then continue; fi      # The $HOME is set by gLExec to the mapped account
            if [ "$E" == "GLEXEC_WRAP_X509_USER_PROXY" ]; then continue; fi      # The $X509_USER_PROXY is set by gLExec to the default target location of the proxy or to the $GLEXEC_TARGET_PROXY

            # Export the unwrapped environment variables
            export $D
        fi
    done
    IFS=$PRESERVED_IFS
}

echo "----- fire $0 : unwrap_env -------"
unwrap_env

echo "----- fire $0 : printenv   -------"
printenv