opt/gl-select/gl-select

#!/bin/bash
#
# gl-select: select active gl/glx libraries/extensions
#
# Matt Housh, jaeger at morpheus dot net
# Jose V Beneyto, joberui at ei dot upv dot es
#

##### CHANGELOG #####
Feb 20, 2007 - version 1.1
	changelog was not kept prior to this date
	added abstractions and ati support contributed by Jose V Beneyto (sepen)
#####################

infoUsage() {
	echo "Usage: $0 [x11|nvidia|ati]"
}

infoMissing() {
	echo "One or more of the non-x11 gl/glx backup files are missing. This means"
	echo "either you're not using a non-x11 gl/glx setup, in which case nothing"
	echo "needs to be changed, OR your x11 backups are missing, which can be"
	echo "solved by reinstalling the x11 package from the CRUX CD or ports."
}

infoRevert() {
	echo "You appear to already be using a non-x11 gl/glx setup. If the"
	echo "one selected isn't the correct one, revert to x11 and then select"
	echo "the correct new setup using 'gl-select x11; gl-select <new gl/glx>'."
}

checkInstalled() {
	if [ -z "`pkginfo -i | awk '{ print $1 }' | grep -e ^$1$`" ]
	then
		echo "$1 isn't installed!"
		exit 1
	fi
}

# if other than a single argument is passed, spit out some help
if [ $# -ne 1 ]
then
	infoUsage
	exit 1
fi

# check for the x11 port; if it's not installed, why is this script even run?
checkInstalled x11

# perform the selection for the following supported gl/glx setups
case "$1" in
	"x11")
		echo "* x11 gl/glx selected"

		# check for the existence of libglx_so, libGL_so_1_2 and friends
		# if none, nothing is necessary or the backups have been erased
		BACKUPS="/usr/X11R6/lib/modules/extensions/libglx_so \
			/usr/X11R6/lib/modules/extensions/libGLcore_so \
			/usr/X11R6/lib/libGL_so_1_2 \
			/usr/X11R6/lib/libGL_a"

		for F in $BACKUPS
		do
			if [ ! -e $F ]
			then
				infoMissing
				exit 1
			fi
		done

		# move the x11 backups back into place
		echo -n "libglx "
		rm -f /usr/X11R6/lib/modules/extensions/libglx.so
		mv /usr/X11R6/lib/modules/extensions/libglx{_so,.so}
		echo -n "libGLcore "
		rm -f /usr/X11R6/lib/modules/extensions/libGLcore.so
		mv /usr/X11R6/lib/modules/extensions/libGLcore{_so,.so}
		echo -n "libGL "
		mv /usr/X11R6/lib/libGL{_so_1_2,.so.1.2}
		mv /usr/X11R6/lib/libGL{_a,.a}
		;;

	"nvidia")
		echo "* nvidia gl/glx selected"

		# is the nvidia port installed?
		checkInstalled nvidia

		# get the .so version number
		NV_VER="`pkginfo -i | grep "^nvidia " | awk '{ print $2 }' | cut -d- -f2`"

		# check for the existence of libglx_so and libGL_so_1_2
		# if none, move the x11 stuff out of the way for nvidia's
		if [ ! -e /usr/X11R6/lib/modules/extensions/libglx_so -a ! -e \
			/usr/X11R6/lib/libGL_so_1_2 ]
		then
			echo -n "libglx "
			mv /usr/X11R6/lib/modules/extensions/libglx{.so,_so}
			ln -s libglx.so.1.0.$NV_VER \
				/usr/X11R6/lib/modules/extensions/libglx.so
			echo -n "libGLcore "
			mv /usr/X11R6/lib/modules/extensions/libGLcore{.so,_so}
			ln -s /usr/lib/libGLcore.so.1.0.$NV_VER \
				/usr/X11R6/lib/modules/extensions/libGLcore.so
			echo -n "libGL "
			mv /usr/X11R6/lib/libGL{.so.1.2,_so_1_2}
			mv /usr/X11R6/lib/libGL{.a,_a}
			rm /usr/X11R6/lib/libGL.so*
			# nvidia's library versioning prevents ldconfig from creating
			# libGL.so and libGLcore.so
			[ ! -L /usr/lib/libGL.so ] && \
				ln -sf libGL.so.1.0.$NV_VER /usr/lib/libGL.so
			[ ! -L /usr/lib/libGLcore.so ] && \
				ln -sf libGLcore.so.1.0.$NV_VER /usr/lib/libGLcore.so
		else
			infoRevert
			exit 1
		fi
		;;

	"ati")
		echo "* ati gl/glx selected"

		# is the ati port installed?
		checkInstalled ati

		# check for the existence of libGL_so_1_2
		# if none, copy/move the x11 stuff out of the way for ati's
		if [ ! -e /usr/X11R6/lib/libGL_so_1_2 ]
		then
			# we only need to move one library because it's the unique
			# that overwrites the x11 libGL, the other must be copied to be 
			# possible the revertion of the driver
			echo -n "libglx "
			cp /usr/X11R6/lib/modules/extensions/libglx{.so,_so}
			echo -n "libGLcore "
			cp /usr/X11R6/lib/modules/extensions/libGLcore{.so,_so}
			echo -n "libGL "
			cp /usr/X11R6/lib/libGL{.a,_a}
			mv /usr/X11R6/lib/libGL{.so.1.2,_so_1_2}
			# according to ati port
			[ ! -L /usr/lib/libGL.so ] && \
				ln -sf libGL_so_1_2_ati /usr/X11R6/lib/libGL.so
			[ ! -L /usr/X11R6/lib/libGL.so.1 ] && \
				ln -sf libGL_so_1_2_ati /usr/X11R6/lib/libGL.so.1
			[ ! -L /usr/X11R6/lib/libGL.so.1.2 ] && \
				ln -sf libGL_so_1_2_ati /usr/X11R6/lib/libGL.so.1.2
		else
			infoRevert
			exit 1
		fi
		;;

	*)
		infoUsage
		;;
esac

/sbin/ldconfig > /dev/null 2>&1

echo "done."

# End of file