#!/bin/ksh
# *                                                                      *
# * (c) Copyright 1993, 1994 Hewlett-Packard Company                     *
# * (c) Copyright 1993, 1996 International Business Machines Corp.       *
# * (c) Copyright 1993, 1994 Sun Microsystems, Inc.                      *
# * (c) Copyright 1993, 1994 Novell, Inc.                                *
# *

DTPATH=/usr/dt/bin/dtlogin
XDMCONF=/usr/lpp/X11/lib/X11/xdm/xdmconf
GETTY=/usr/sbin/getty


#
# Message text
#

msg1='can only be run by the super user. \n'

msg2='The CDE environment is now set as the default user interface.
This interface will appear on login for all users of the system.
To see this change take effect you must shutdown and restart your system.\n'

msg3='The Command line is now set as the default user interface.
This interface will appear on login for all users of the system.
To see this change take effect you must shutdown and restart your system.\n'

msg4='The CDE environment is Already set as the default User Interface.\n'

msg5='The Command line is already set as the default User Interface.\n'

msg6='usage: %s
  -e (enable auto-start of dtlogin) 
  -enograph (enable auto-start of dtlogin without graphical boot) 
  -d (disable auto-start of dtlogin)
  -kill (kill dtlogin)
  -reset (reset dtlogin - reread configuration files)\n'

msg7='Too many arguments \n'

msg8='Needs one argument \n'

msg9='Could not disable xdm, Please refer to xdm man pages to
disable xdm and try again.\n'

msg10='Dtlogin is not running \n'

GetLoginServerPid()
{
# GetLoginServerPid() prints login server pid if found, else nothing

  grep=/usr/bin/grep
  ps=/usr/bin/ps
  cut=/usr/bin/cut
  awk=/usr/bin/awk

  $ps -u 0 -el | $grep dtlogin | $awk '{print $4 " " $5}' |
  while read -r pid ppid; do
    if [ "$($ps -p $ppid | $grep dtlogin)" = "" ]; then
      print "$pid"
      break
    fi
  done
}

SignalDt()
{
# SignalDt() - kill or reset login server
# $1 - operation (kill|reset)

  pid=`GetLoginServerPid`

  if [ "$pid" != "" ]; then
    if [ "$1" = "kill" ]; then
      /bin/kill $pid       #kill login server
    else
      /bin/kill -HUP $pid  #reset login server
    fi 
    Exit 0
  else
    Exit 1 200 "no login server is running\n"
  fi
}



Message()
{
# Message() - display message from dtconfig.cat
#   $1 - message id
#   $2 - fallback message text
#   $3 - message insert 1
#   $4 - message insert 2
  dspmsg -s 10 dtconfig $1 "$2" "$3" "$4"
}

Exit()
{
# Exit() - display optional message and exit
#   $1 - exit code
#   $2 - message id (optional)
#   $3 - fallback message text
#   $4 - message insert 1
#   $5 - message insert 2

  if [ "$2" != "" ]; then
    Message $2 "$3" "$4" "$5"
  fi

  exit $1
}

DisableXdm()
{
# DisableXdm() - disable inittab start of xdm if necessary

#
# Check for xdm inittab entry
#
  egrep "^xdm" /etc/inittab > /dev/null 2>&1
  rc=$?

#
# Check for the existence of xdm Subsystem.
#
  lssrc -s xdm  > /dev/null 2>&1
  rc1=$?

#
# if either or both of the tests are true unconfigure xdm
# Note that a return code of 0 is true
#
  if [ "$rc" = "0" ] || [ "$rc1" = "0" ]; then
    if [ ! -f $XDMCONF ]; then
      Exit 1 9 "$msg9"
    fi
    $XDMCONF -d
  fi
}

ConfigureDt()
{
# ConfigureDt() - enable or disable inittab start of dtlogin
# $1 - operation (enable|disable)

#
# Disable xdm if necessary
#
  if [ "$1" != "dgbo" ]; then
     DisableXdm
  fi
#
# Check for the existence of COSE Subsystem and create if
# it's not there are we are enabling dtlogin
#
  if [ "$1" != "dgbo" ]; then
    /bin/lssrc -s dtsrc  > /dev/null 2>&1
    if [ "$?" -ne 0 ]; then
      if [ "$1" = "enable" -o "$1" = "enogb" ]; then
        /bin/mkssys -s dtsrc -p $DTPATH -u 0 -S -n 15 -f 9 > /dev/null 2>&1
      fi
    fi
  fi

#
# See if 'dt' is in inittab
#
  /usr/sbin/lsitab dt > /dev/null 2>&1
  if [ "$?" -eq 0 ]; then
    curstate="enabled"
  else
#
# See if 'dt_nogb' is in inittab
#
    /usr/sbin/lsitab dt_nogb > /dev/null 2>&1
    if [ "$?" -eq 0 ]; then
      curstate="e_nogb"
    else
      curstate="disabled"
    fi
  fi


  case $1 in
    enable)
           if [ "$curstate" = "enabled" ]; then
#
# Already enabled
#
             Exit 0 4 "$msg4"
           elif [ "$curstate" = "e_nogb" ]; then
	      /usr/sbin/rmitab dt_nogb
           fi

#
# Enable it
#

           if [ -s /etc/.init.state ]; then
              /usr/sbin/mkitab "dt:`cat /etc/.init.state`:wait:/etc/rc.dt"
           else
              #
              # if /etc/.init.state does NOT exist, hard code a 2 in the inittab entry
              #
              /usr/sbin/mkitab "dt:2:wait:/etc/rc.dt"
           fi
           Message 2 "$msg2"

#
# move the "cons" record to the end of inittab file,
# and, after the "dt" record to let desktop come up
# before console login.
#
           consitab=`/usr/sbin/lsitab cons`
           if [ ! -z "$consitab" ]; then
             /usr/sbin/rmitab cons
             /usr/sbin/mkitab -i dt "$consitab"
           fi
           Exit 0 ;;

    enogb)
           if [ "$curstate" = "e_nogb" ]; then
#
# Already enabled
#
             Exit 0 4 "$msg4"
           elif [ "$curstate" = "enabled" ]; then
	      /usr/sbin/rmitab dt
           fi

#
# Enable it
#

           if [ -s /etc/.init.state ]; then
              /usr/sbin/mkitab "dt_nogb:`cat /etc/.init.state`:wait:/etc/rc.dt"
           else
              #
              # if /etc/.init.state does NOT exist, hard code a 2 in the inittab entry
              #
              /usr/sbin/mkitab "dt_nogb:2:wait:/etc/rc.dt"
           fi
           Message 2 "$msg2"

#
# move the "cons" record to the end of inittab file,
# and, after the "dt" record to let desktop come up
# before console login.
#
           consitab=`/usr/sbin/lsitab cons`
           if [ ! -z "$consitab" ]; then
             /usr/sbin/rmitab cons
             /usr/sbin/mkitab -i dt_nogb "$consitab"
           fi
           Exit 0 ;;

    dgbo)
           if [ "$curstate" != "enabled" ]; then
#
# Already disabled
#
             Exit 0 
           fi
           /usr/sbin/rmitab dt

#
# Enable it
#

           /usr/sbin/mkitab "dt_nogb:2:wait:/etc/rc.dt"
           Message 2 "$msg2"

#
# move the "cons" record to the end of inittab file,
# and, after the "dt" record to let desktop come up
# before console login.
#
           consitab=`/usr/sbin/lsitab cons`
           if [ ! -z "$consitab" ]; then
             /usr/sbin/rmitab cons
             /usr/sbin/mkitab -i dt_nogb "$consitab"
           fi
           Exit 0 ;;

    disable)

           if [ "$curstate" = "disabled" ]; then
#
# Already disabled
#
             Exit 0 5 "$msg5"
           fi

#
# remove the "dt" inittab entry for disabling "dt"
# Note: The "dtsrc" subsystem would remain intact.
# It gets removed only when the super user deletes it
# explicitly by the rmssys command.
#
           if [ "$curstate" = "enabled" ]; then
             /usr/sbin/rmitab "dt"
           else
	     /usr/sbin/rmitab dt_nogb
	   fi
           Message 3 "$msg3"
           Exit 0 ;;
    *)  Exit 0
  esac
}

#
# Check if the user is a super user.
#
if [ "root" != `/usr/bin/whoami` ]; then
  echo "`basename $0`: \c" 
  Exit 1 1 "$msg1"
fi

#
# Check param count
#
if [ $# -ne 1 ]; then
  Exit 1 6 "$msg6" "`basename $0` -e|-d|-kill|-reset"
fi

#
# Check options and run command
#
case $1 in
  -e) ConfigureDt enable;;
  -d) ConfigureDt disable;;
  -disable_graphical_boot_only) ConfigureDt dgbo;;
  -enograph) ConfigureDt enogb;;
  -kill) SignalDt kill;;
  -reset) SignalDt reset;;
  *) Exit 1 6 "$msg6" "`basename $0` -e|-d|-kill|-reset"
esac