#!/bin/sh
#
# Copyright (c) 2008, 2014, Oracle and/or its affiliates. All rights reserved.
#
# oka.sbs - init script for the kernel Accelerator
# This is run by the RC system.


################### INSTANTIATED VARIABLES ####################
ORACLE_HOME=%ORA_CRS_HOME%
export ORACLE_HOME

PATH=/usr/bin:/bin:$ORACLE_HOME/bin
USER=%ORACLE_OWNER%

################### TOOLS #####################################
if [ -z "$CHMOD" ]; then CHMOD=/bin/chmod; fi
if [ -z "$ECHO" ]; then ECHO=/bin/echo; fi
UNAME=/bin/uname
PLATFORM=`$UNAME`
OKAROOT=${ORACLE_HOME}/bin/okaroot
OKALOAD=${ORACLE_HOME}/bin/okaload

######### CLI tools #########
HOSTN=/bin/hostname
ECHO=/bin/echo
SLEEP=/bin/sleep
BASENAME=/bin/basename
RMF="/bin/rm -f"
HOSTN=/bin/hostname
TOUCH=/bin/touch
SU=/bin/su
CAT=/bin/cat
LOGMSG="/bin/logger -puser.err"
LOGERR="/bin/logger -puser.alert"
MKDIR=/usr/bin/mkdir
CHMOD=/usr/bin/chmod
CHOWN=/usr/bin/chown
DIRNAME=/usr/bin/dirname

# Location to TR differs in diff. platforms.
TR=/bin/tr

# How long to wait (in seconds) before rechecking a dependency,
# and printing out messages about it.
DEP_CHECK_WAIT=60

case $PLATFORM in
Linux)
       ID=/etc/init.d
       INIT=/sbin/init
       LOGGER="/usr/bin/logger"
       if [ ! -f "$LOGGER" ]; then
         LOGGER="/bin/logger"
        fi
       LOGERR="$LOGGER -puser.err"
       LOGMSG="$LOGGER -puser.alert"
       SUBSYSFILE="/var/lock/subsys/oka"
       TOUCH=/bin/touch
       RMF="/bin/rm -f"
       MKDIR=/bin/mkdir
       CHMOD=/bin/chmod
       CHOWN=/bin/chown
       TR=/usr/bin/tr
       OKA_PORTAL_DEV=/dev/oracka
       ;;
SunOS)
       TR=/usr/xpg4/bin/tr
       ;;
*)     /bin/echo "ERROR: Unknown Operating System"
       exit -1
       ;;
esac

# Function : Log message to syslog and console
log_console () {
  $ECHO "$*"
  $LOGMSG "$*"
}

log_error () {
  $ECHO "$*"
  $LOGERR "$*"
}

success_status()
{
    $LOGMSG "OK"
    return 0
}

if_fail()
{
    RC="$1"
    REASON="$2"
    if [ "$RC" = "0" ]
    then
        success_status
        return
    fi
    log_error "${REASON}"
    exit 1
}

add_subsysfile()
{
  case $PLATFORM in
    Linux)
      #TODO make sure that this makes sense for us
      # Create /var/lock/subsys/oka 
      $TOUCH $SUBSYSFILE
      ;;
    *)
      ;;
  esac
}
 
rem_subsysfile()
{
  case $PLATFORM in
    Linux)
      # remove /var/lock/subsys/oka 
      ;;
    *)
      ;;
  esac
}
 
install()
{
 $LOGMSG "Installing OKA... "
 CMD="${OKAROOT} install"
 $CMD 
 if_fail "$?" "Failed to install OKA"
 add_subsysfile
 $LOGMSG "OKA Installed."
  
}

uninstall()
{
 $LOGMSG "Uninstalling OKA... "
 CMD="${OKAROOT} uninstall" 
 $CMD 
 if_fail "$?" "Failed to uninstall OKA"
 rem_subsysfile
 $LOGMSG "OKA Uninstalled." 
}

start()
{
  #TODO find if we really need to wait 
 $LOGMSG "Starting OKA... "
  # Wait until it is safe to start OKA
  # Wait for 10 minutes for filesystem to mount
  # Print message to syslog and console
  works=true
  for minutes in 10 9 8 7 6 5 4 3 2 1
  do
    if [ ! -r $OKALOAD ]
    then
      works=false
      log_console "Waiting $minutes minutes for filesystem containing $OKALOAD."
      $SLEEP $DEP_CHECK_WAIT
    else
      works=true
      break
    fi
  done

  if [ ! $works ]
  then
    log_console "Fatal Error :: Timed out waiting for the filesystem containing $OKALOAD."
    log_console "Oracle Grid Infrastructure not able to access filesystem containing $OKALOAD."
    log_console "Fix the problem and issue command 'okaroot install' as root user to start kernel accelerator."
    exit 1
  fi

 CMD="${OKALOAD} start"  
 $CMD 
 if_fail "$?" "Failed to install OKA"
 add_subsysfile
 $LOGMSG "OKA Loaded."
}

stop()
{
 $LOGMSG "Stoping OKA... "
 CMD="${OKALOAD} stop"
 $CMD
 if_fail "$?" "Failed to stop OKA"
 rem_subsysfile
 $LOGMSG "OKA Unloaded."
}

status()
{
 $LOGMSG "Checking OKA status..."
 CMD="${OKALOAD} check"
 $CMD 
 if_fail "$?"  "OKA Portal device is not accessible"
 $LOGMSG "OKA Accessible"
}

# Main loop
case $1 in 
'start')
 start
 ;;
'stop')
 stop
 ;;
'restart')
 stop
 start
 ;;
'status')
 status
 ;;
 'install')
  install
  ;;
 'uninstall')
  uninstall
  ;;
 'enable')
  $LOGMSG "Enable OKA.."
  start 
  ;;
 'disable')
  $LOGMSG "Disable OKA.."
  stop 
  ;;
*)
    $ECHO "Usage: $0 {stop|start|restart|status|install|uninstall|disable|enable}"
    exit 1;
    ;;

esac

exit 0