calculate-utils-2.2-install/data/xautologin

#!/bin/bash

# first param - autologin user
XUSER=${1:-guest}
# number of virtual console
TTYNUM=${2:-7}
# number of virtual console
DISPLAYNUM=${3:-\:0}
# write pid for init.d/xdm (detect X for this xautologin)
echo $BASHPID >/var/run/bash.pid

MAINLOOP=1
killXserver()
{
	KILLXPID=$XPID
	XPID=
	MAINLOOP=
	kill -9 $KILLXPID &>/dev/null
}

trap killXserver SIGTERM SIGINT SIGQUIT

# rerun x session for XUSER while not shutdown and bash not receivce TERM
while id $XUSER &>/dev/null && 
       [[ -n $MAINLOOP ]] &&
       [[ "$(rc-status -r)" != "shutdown" ]]
do
    # perform user profile setting up
    X ${DISPLAYNUM} vt${TTYNUM} &
    XPID=$!
    export DISPLAY=${DISPLAYNUM}
    env USER=${XUSER} /usr/share/calculate/xdm/xdm --login || break
    # write pam enviroment for pam_ck_connector
    cat >/home/${XUSER}/.pam_environment <<EOF
CKCON_DISPLAY_DEVICE=
CKCON_X11_DISPLAY_DEVICE=/dev/tty${TTYNUM}
CKCON_X11_DISPLAY=${DISPLAYNUM}
EOF
    # registry user in utmp and wtmp
    sessreg -a -l ${DISPLAYNUM} ${XUSER}
    # run x session for user XUSER in background
    su - ${XUSER} -c 'source /etc/profile
                    # replace xinit for startx
                    xinit()
                    {
                        # if file is script run it throught bash
                        if file $1 | grep -1 "POSIX shell script"
                        then
                            /bin/bash $*
                        else
                            $*
                        fi
                    }
                    # run script start xsession
                    source /usr/bin/startx' &
    # wait for right work trap SIGTERM
    wait $!
    # remove user from utmp and wtmp
    sessreg -d -l ${DISPLAYNUM} ${XUSER}
    # perform logout scripts for user
    env USER=${XUSER} /usr/share/calculate/xdm/xdm --logout
    [[ -n $XPID ]] && kill -9 $XPID
done

exit 0