: "@(#) /usr/bin/X11/X11		Shell Script for X11"

# X11 launching script.  This checks for certain global things that should have
# been set up properly by the X installation procedure, checks to ensure that
# the user's environment has been set up properly (or that defaults should be
# used), and launches X if there are no problems.  If there are non-fatal
# problems, those will be reported.


X11BINDIR=${X11BINDIR:-/usr/bin/X11}
X11LIBDIR=${X11LIBDIR:-/usr/lib/X11}
TERMINFODIR=/usr/lib/terminfo/x

USERX11START=$HOME/.x11start
SYSX11START=$X11LIBDIR/.x11start

USERTWMRC=$HOME/.twmrc
SYSTWMRC=$X11LIBDIR/Sample.twmrc

DEBUGLOG=x11debug.log


DISPLAY="unix:0.0"
export DISPLAY


#
# Error output from X goes to $DEBUGLOG in the current directory; make sure we
# can write on it.
#
if [ ! -w . ]; then
    screenrestore
    echo "$0: Directory `pwd` not writable, can't create $DEBUGLOG." > /dev/tty
    echo "Terminating X startup ..." > /dev/tty
    sleep 5
    exit 1
fi

if [ -f $DEBUGLOG -a ! -w $DEBUGLOG ]; then
    screenrestore
    echo "$0: Non-writable $DEBUGLOG file already exists." > /dev/tty
    echo "Terminating X startup ..." > /dev/tty
    sleep 5
    exit 1
fi

rm -f $DEBUGLOG
touch $DEBUGLOG

#
# Shared libraries must be present and executable(!) else all clients fail.
#
if [ ! -x /shlib/libX11_s -o ! -x /shlib/libX11_s.1.0 -o \
     ! -x /shlib/libXt_s.1.0 -o ! -x /shlib/libXaw_s.1.0 -o \
     ! -x /shlib/libXmu_s.1.0 -o ! -x /shlib/libXext_s.1.0 ]; then
    screenrestore
    echo "$0: The shared libraries in /shlib are not present, all X11 clients need them." > /dev/tty
    echo "Terminating X startup ..." > /dev/tty
    sleep 5
    exit 1
fi


#
# Check for the three common user configuration errors:
#	1) not copying .x11start to home directory
#	2) not copying .twmrc to home directory
#	3) not having an X11 bin directory in the path (default /usr/bin/X11)
#
if [ -x $USERX11START ]; then
    X11START=$USERX11START
elif [ -f $USERX11START ]; then
    echo "Your X11 startup script ($USERX11START) is not executable." \
		>> $DEBUGLOG
else
    echo "You don't have an X11 startup script ($USERX11START)." >> $DEBUGLOG
fi

if [ ! "$X11START" ]; then
    # Use default startup script.  If it doesn't exist or is non-executable,
    # the console xterm will print the error message 
    # "xterm: Can't execvp $X11START".
    X11START=$SYSX11START

    if [ -x $SYSX11START ]; then
	echo "Using default X11 startup script ($SYSX11START)." >> $DEBUGLOG
    elif [ -f $SYSX11START ]; then
	echo "Default X11 startup script ($SYSX11START) is not executable." \
		>> $DEBUGLOG
    else
	cat <<END >> $DEBUGLOG
Default X11 startup script ($SYSX11START) doesn't exist.
If you a using a different X11 lib directory, set the X11LIBDIR environment
variable to that directory name.
END
    fi

    echo >> $DEBUGLOG
fi

# twm only tries to read the local twmrc file.  It will run without 
# a startup file, using built-in defaults.
if [ ! -f $USERTWMRC ]; then
    echo "You don't have a twm startup file ($USERTWMRC)." >> $DEBUGLOG
    if [ -r $SYSTWMRC ]; then
	cp $SYSTWMRC $USERTWMRC
	echo "Copied twm startup file from $SYSTWMRC to $USERTWMRC." \
		>> $DEBUGLOG
    elif [ -f $SYSTWMRC ]; then
	echo "Default twm startup file ($SYSTWMRC) is non-readable." \
		>> $DEBUGLOG
    else
	cat <<END >> $DEBUGLOG
Default twm startup script ($SYSTWMRC) doesn't exist.
If you a using a different X11 lib directory, set the X11LIBDIR environment
variable to that directory name.
END
    fi
    echo >> $DEBUGLOG
elif [ ! -r $USERTWMRC ]; then
    echo "Your twm startup file ($USERTWMRC) is non-readable." >> $DEBUGLOG
    echo >> $DEBUGLOG
fi

FOUND=0
for i in `echo $PATH | sed 's/:/ /g'`
do
    if [ $i = $X11BINDIR ]; then
	FOUND=1
	break
    fi
done
if [ $FOUND -eq 0 ]; then
    PATH=$PATH:$X11BINDIR
    export PATH
    cat <<END >> $DEBUGLOG
Appended $X11BINDIR to PATH for this process and its children.
Edit the PATH setting in your shell startup script.  If you are using 
a different X11 bin directory, set the X11BINDIR environment variable to 
that directory name.

END
fi


#
# Make sure that the terminfo files for xterm are in place.  The installation
# should have taken care of this properly.
#
for i in $TERMINFODIR/xterm $TERMINFODIR/xterms
do
    if [ ! -f $i ]; then
	echo "$i doesn't exist." >> $DEBUGLOG
	echo >> $DEBUGLOG
    elif [ ! -r $i ]; then
	echo "$i is non-readable." >> $DEBUGLOG
	echo >> $DEBUGLOG
    fi
done


#
# If there were any non-fatal errors, report them now and press on.
#
if [ -s $DEBUGLOG ]; then
    screenrestore
    cat $DEBUGLOG > /dev/tty
    echo "Proceeding with X startup ..." > /dev/tty
    sleep 5
fi


#
# Do it.
#
xinit -geometry 60x8+0+0 -sb -fn 6x10 -T "console" -e $X11START \
	-- ${X11BINDIR}/XmacII -logo -v $* >> $DEBUGLOG 2>&1

Xrepair >> $DEBUGLOG 2>&1
screenrestore
cat $DEBUGLOG > /dev/tty
sleep 3