Stuff

$ cat /etc/X11/chooser.sh
#!/bin/sh
# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License, v2
# Author:  Martin Schlemmer <azarah@gentoo.org>
# $Header: /var/cvsroot/gentoo-x86/x11-apps/xinit/files/chooser.sh,v 1.4 2006/09/05 23:22:13 dberkholz Exp $

# If $XSESSION is "", source first /etc/conf.d/basic, and then /etc/rc.conf
if [ -z "${XSESSION}" ]
then
        [ -f /etc/conf.d/basic ] && . /etc/conf.d/basic
        [ -f /etc/rc.conf ] && . /etc/rc.conf
fi

# Find a match for $XSESSION in /etc/X11/Sessions
GENTOO_SESSION=""
for x in /etc/X11/Sessions/*
do
        if [ "`echo ${x##*/} | awk '{ print toupper($1) }'`" \
                = "`echo ${XSESSION} | awk '{ print toupper($1) }'`" ]
        then
                GENTOO_SESSION=${x}
                break
        fi
done

GENTOO_EXEC=""

if [ -n "${XSESSION}" ]; then
        if [ -f /etc/X11/Sessions/${XSESSION} ]; then
                if [ -x /etc/X11/Sessions/${XSESSION} ]; then
                        GENTOO_EXEC="/etc/X11/Sessions/${XSESSION}"
                else
                        GENTOO_EXEC="/bin/sh /etc/X11/Sessions/${XSESSION}"
                fi
        elif [ -n "${GENTOO_SESSION}" ]; then
                if [ -x "${GENTOO_SESSION}" ]; then
                        GENTOO_EXEC="${GENTOO_SESSION}"
                else
                        GENTOO_EXEC="/bin/sh ${GENTOO_SESSION}"
                fi
        else
                x=""
                y=""

                for x in "${XSESSION}" \
                        "`echo ${XSESSION} | awk '{ print toupper($1) }'`" \
                        "`echo ${XSESSION} | awk '{ print tolower($1) }'`"
                do
                        # Fall through ...
                        if [ -x "`which ${x} 2>/dev/null`" ]; then
                                GENTOO_EXEC="`which ${x} 2>/dev/null`"
                                break
                        fi
                done
        fi
fi

echo "${GENTOO_EXEC}"


# vim:ts=4