Ticket #131: startx

#!/bin/sh

# $Xorg: startx.cpp,v 1.3 2000/08/17 19:54:29 cpqbld Exp $
#
# This is just a sample implementation of a slightly less primitive
# interface than xinit.  It looks for user .xinitrc and .xserverrc
# files, then system xinitrc and xserverrc files, else lets xinit choose
# its default.  The system xinitrc should probably do things like check
# for .Xresources files and merge them in, startup up a window manager,
# and pop a clock and serveral xterms.
#
# Site administrators are STRONGLY urged to write nicer versions.
#
# $XFree86: xc/programs/xinit/startx.cpp,v 3.16tsi Exp $

unset DBUS_SESSION_BUS_ADDRESS
unset SESSION_MANAGER



# Check for /usr/bin/X11 and BINDIR in the path, if not add them.
# This allows startx to be placed in a place like /usr/bin or /usr/local/bin
# and people may use X without changing their PATH.
# Note that we put our own bin directory at the front of the path, and
# the standard system path at the back, since if you are using the Xorg
# server theres a pretty good chance you want to bias the Xorg clients
# over the old system's clients.

# First our compiled path
bindir=/usr/X11/bin

case $PATH in
    *:$bindir | *:$bindir:* | $bindir:*) ;;
    *) PATH=$bindir:$PATH ;;
esac

# Now the "old" compiled path

oldbindir=/usr/X11R6/bin




if [ -d "$oldbindir" ] ; then
    case $PATH in
        *:$oldbindir | *:$oldbindir:* | $oldbindir:*) ;;
        *) PATH=$PATH:$oldbindir ;;
    esac
fi

# Bourne shell does not automatically export modified environment variables
# so export the new PATH just in case the user changes the shell
export PATH


userclientrc=$HOME/.xinitrc
sysclientrc=/usr/X11/lib/X11/xinit/xinitrc


userserverrc=$HOME/.xserverrc
sysserverrc=/usr/X11/lib/X11/xinit/xserverrc
defaultclient=xterm
defaultserver=/usr/X11/bin/X
defaultclientargs=""
defaultserverargs=""
defaultdisplay=":0"
clientargs=""
serverargs=""



# Initialize defaults (this will cut down on "safe" error messages)
if ! defaults read org.x.X11 cache_fonts >& /dev/null ; then
    defaults write org.x.X11 cache_fonts -bool true
fi

if ! defaults read org.x.X11 no_auth >& /dev/null ; then
    defaults write org.x.X11 no_auth -bool false
fi

if ! defaults read org.x.X11 nolisten_tcp >& /dev/null ; then
    defaults write org.x.X11 nolisten_tcp -bool true
fi

# First, start caching fonts
if [ x`defaults read org.x.X11 cache_fonts` = x1 ] ; then
    if [ -x /usr/X11/bin/font_cache ] ; then
        /usr/X11/bin/font_cache &
    elif [ -x /usr/X11/bin/font_cache.sh ] ; then
        /usr/X11/bin/font_cache.sh &
    elif [ -x /usr/X11/bin/fc-cache ] ; then
        /usr/X11/bin/fc-cache &
    fi
fi

if [ -x /usr/X11/lib/X11/xinit/privileged_startx ] ; then
        # Don't push this into the background becasue it can cause
        # a race to create /tmp/.X11-unix
        /usr/X11/lib/X11/xinit/privileged_startx
fi

if [ x`defaults read org.x.X11 no_auth` = x0 ] ; then
    enable_xauth=1
else
    enable_xauth=0
fi

if [ x`defaults read org.x.X11 nolisten_tcp` = x1 ] ; then
    defaultserverargs="$defaultserverargs -nolisten tcp"
fi

for ((d=0; ; d++)) ; do
    [[ -e /tmp/.X$d-lock ]] || break
done
defaultdisplay=":$d"






whoseargs="client"
while [ x"$1" != x ]; do
    case "$1" in
    # '' required to prevent cpp from treating "/*" as a C comment.
    /''*|\./''*)
        if [ "$whoseargs" = "client" ]; then
            if [ x"$clientargs" = x ]; then
                client="$1"
            else
                clientargs="$clientargs $1"
            fi
        else
            if [ x"$serverargs" = x ]; then
                server="$1"
            else
                serverargs="$serverargs $1"
            fi
        fi
        ;;
    --)
        whoseargs="server"
        ;;
    *)
        if [ "$whoseargs" = "client" ]; then
            clientargs="$clientargs $1"
        else
            # display must be the FIRST server argument
            if [ x"$serverargs" = x ] && \
                 expr "$1" : ':[0-9][0-9]*$' > /dev/null 2>&1; then
                display="$1"
            else
                serverargs="$serverargs $1"
            fi
        fi
        ;;
    esac
    shift
done

# process client arguments
if [ x"$client" = x ]; then
    client=$defaultclient

    # if no client arguments either, use rc file instead
    if [ x"$clientargs" = x ]; then
        if [ -f "$userclientrc" ]; then
            client=$userclientrc
        elif [ -f "$sysclientrc" ]; then
            client=$sysclientrc






        fi

        clientargs=$defaultclientargs
    fi
fi

# process server arguments
if [ x"$server" = x ]; then
    server=$defaultserver

    # if no server arguments or display either, use defaults
    if [ x"$serverargs" = x -a x"$display" = x ]; then
        # For compatibility reasons, only use xserverrc if there were no server command line arguments
        if [ -f "$userserverrc" ]; then
            server=$userserverrc
        elif [ -f "$sysserverrc" ]; then
            server=$sysserverrc
        fi

        serverargs=$defaultserverargs
        display=$defaultdisplay
    fi
fi

if [ x"$enable_xauth" = x1 ] ; then
    if [ x"$XAUTHORITY" = x ]; then
        XAUTHORITY=$HOME/.Xauthority
        export XAUTHORITY
    fi

    removelist=

    # set up default Xauth info for this machine
    case `uname` in
    Linux*)
        if [ -z "`hostname --version 2>&1 | grep GNU`" ]; then
            hostname=`hostname -f`
        else
            hostname=`hostname`
        fi
        ;;
    *)
        hostname=`hostname`
        ;;
    esac

    authdisplay=${display:-:0}



    if [ -r /dev/urandom ]; then
        mcookie=`dd if=/dev/urandom bs=16 count=1 2>/dev/null | hexdump -e \\"%08x\\"`
    else
        mcookie=`dd if=/dev/random bs=16 count=1 2>/dev/null | hexdump -e \\"%08x\\"`
    fi

    if test x"$mcookie" = x; then
        echo "Couldn't create cookie"
        exit 1
    fi
    dummy=0

    # create a file with auth information for the server. ':0' is a dummy.
    xserverauthfile=$HOME/.serverauth.$$
    trap "rm -f '$xserverauthfile'" HUP INT QUIT ILL TRAP KILL BUS TERM
    xauth -q -f "$xserverauthfile" << EOF
add :$dummy . $mcookie
EOF
    serverargs=${serverargs}" -auth '"${xserverauthfile}"'"

    # now add the same credentials to the client authority file
    # if '$displayname' already exists do not overwrite it as another
    # server man need it. Add them to the '$xserverauthfile' instead.
    for displayname in $authdisplay $hostname$authdisplay; do
        authcookie=`xauth list "$displayname" \
        | sed -n "s/.*$displayname[[:space:]*].*[[:space:]*]//p"` 2>/dev/null;
        if [ "z${authcookie}" = "z" ] ; then
            xauth -q << EOF 
add $displayname . $mcookie
EOF
        removelist="$displayname $removelist"
        else
            dummy=$(($dummy+1));
            xauth -q -f "$xserverauthfile" << EOF
add :$dummy . $authcookie
EOF
        fi
    done
fi








eval xinit "$client" $clientargs -- "$server" $display $serverargs


if [ x"$enable_xauth" = x1 ] ; then
    if [ x"$removelist" != x ]; then
        xauth remove $removelist
    fi
    if [ x"$xserverauthfile" != x ]; then
        rm -f "$xserverauthfile"
    fi
fi