test -n "$OPTIONFILE"      || OPTIONFILE=/etc/X11/Xsession.options
test -n "$SYSRESOURCES"    || SYSRESOURCES=/etc/X11/Xresources
test -n "$USRRESOURCES"    || USRRESOURCES=$HOME/.Xresources
test -n "$SYSSESSIONDIR"   || SYSSESSIONDIR=/etc/X11/Xsession.d
test -n "$USERXSESSION"    || USERXSESSION=$HOME/.xsession
test -n "$USERXSESSIONRC"  || USERXSESSIONRC=$HOME/.xsessionrc
test -n "$ALTUSERXSESSION" || ALTUSERXSESSION=$HOME/.Xsession