#!/bin/sh
#
### BEGIN INIT INFO
# Provides:          autoscale-agentd
# Required-Start:    $network $remote_fs $syslog
# Should-Start:      $time
# Required-Stop:     $syslog $remote_fs
# Should-Stop: $time ypbind smtp
# Default-Start:     3 5
# Default-Stop:      0 1 2 6
# Short-Description: Autoscale agentd
# Description:       Start autoscale agentd
### END INIT INFO

# Check for missing binaries (stale symlinks should not happen)
# Note: Special treatment of stop for LSB conformance
ZABBIX_AGENTD_BIN=/onapp/autoscale/autoscale_agentd
test -x $ZABBIX_AGENTD_BIN || { echo "$ZABBIX_AGENTD_BIN not installed";
  if [ "$1" = "stop" ]; then exit 0;
  else exit 5; fi; }

# Check for existence of needed config file and read it
ZABBIX_AGENTD_CONFIG=/onapp/autoscale/autoscale_agentd.conf
test -r $ZABBIX_AGENTD_CONFIG || { echo "$ZABBIX_AGENTD_CONFIG not existing";
  if [ "$1" = "stop" ]; then exit 0;
  else exit 6; fi; }

PidFile=/onapp/autoscale/pidfile

# Source LSB init functions
# providing start_daemon, killproc, pidofproc,
# log_success_msg, log_failure_msg and log_warning_msg.
# This is currently not used by UnitedLinux based distributions and
# not needed for init scripts for UnitedLinux only. If it is used,
# the functions from rc.status should not be sourced or used.
#. /lib/lsb/init-functions

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     be verbose in local rc status and clear it afterwards
#      rc_status -v -r  ditto and clear both the local and overall rc status
#      rc_status -s     display "skipped" and exit with status 3
#      rc_status -u     display "unused" and exit with status 3
#      rc_failed        set local and overall rc status to failed
#      rc_failed <num>  set local and overall rc status to <num>
#      rc_reset         clear both the local and overall rc status
#      rc_exit          exit appropriate to overall rc status
#      rc_active        checks whether a service is activated by symlinks
. /etc/rc.status

# Reset status of this service
rc_reset

# Return values acc. to LSB for all commands but status:
# 0       - success
# 1       - generic or unspecified error
# 2       - invalid or excess argument(s)
# 3       - unimplemented feature (e.g. "reload")
# 4       - user had insufficient privileges
# 5       - program is not installed
# 6       - program is not configured
# 7       - program is not running
# 8--199  - reserved (8--99 LSB, 100--149 distrib, 150--199 appl)
#
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signaling is not supported) are
# considered a success.

case "$1" in
    start)
  echo -n "Starting zabbix agentd "
  ## Start daemon with startproc(8). If this fails
  ## the return value is set appropriately by startproc.
  if [ ! -d $(dirname $PidFile) ]; then
    install -dm0770 $(dirname $PidFile) 2> /dev/null
    chown root.zabbix $(dirname $PidFile)
  fi
  /sbin/startproc -u autoscale -g autoscale -p $PidFile $ZABBIX_AGENTD_BIN -c $ZABBIX_AGENTD_CONFIG

  # Remember status and be verbose
  rc_status -v
  ;;
    stop)
  echo -n "Shutting down zabbix agentd "
  ## Stop daemon with killproc(8) and if this fails
  ## killproc sets the return value according to LSB.

  /sbin/killproc -p $PidFile -TERM $ZABBIX_AGENTD_BIN

  # Remember status and be verbose
  rc_status -v
  ;;
    try-restart|condrestart)
  ## Do a restart only if the service was active before.
  ## Note: try-restart is now part of LSB (as of 1.9).
  ## RH has a similar command named condrestart.
  if test "$1" = "condrestart"; then
    echo "${attn} Use try-restart ${done}(LSB)${attn} rather than condrestart ${warn}(RH)${norm}"
  fi
  $0 status
  if test $? = 0; then
    $0 restart
  else
    rc_reset  # Not running is not a failure.
  fi
  # Remember status and be quiet
  rc_status
  ;;
    restart)
  ## Stop the service and regardless of whether it was
  ## running or not, start it again.
  $0 stop
  $0 start

  # Remember status and be quiet
  rc_status
  ;;
    force-reload)
  ## Signal the daemon to reload its config. Most daemons
  ## do this on signal 1 (SIGHUP).
  ## If it does not support it, restart the service if it
  ## is running.

  echo -n "Reload service zabbix agentd "
  ## if it supports it:
  /sbin/killproc -p $PidFile -HUP $ZABBIX_AGENTD_BIN
  #touch /var/run/zabbix/zabbix-agentd.pid
  rc_status -v

  ## Otherwise:
  #$0 try-restart
  #rc_status
  ;;
    reload)
  ## Like force-reload, but if daemon does not support
  ## signaling, do nothing (!)

  # If it supports signaling:
  echo -n "Reload service zabbix agentd "
  /sbin/killproc -p $PidFile -HUP $ZABBIX_AGENTD_BIN
  #touch /var/run/zabbix/zabbix-agentd.pid
  rc_status -v

  ## Otherwise if it does not support reload:
  #rc_failed 3
  #rc_status -v
  ;;
    status)
  echo -n "Checking for service zabbix agentd "
  ## Check status with checkproc(8), if process is running
  ## checkproc will return with exit status 0.

  # Return value is slightly different for the status command:
  # 0 - service up and running
  # 1 - service dead, but /var/run/  pid  file exists
  # 2 - service dead, but /var/lock/ lock file exists
  # 3 - service not running (unused)
  # 4 - service status unknown :-(
  # 5--199 reserved (5--99 LSB, 100--149 distro, 150--199 appl.)

  # NOTE: checkproc returns LSB compliant status values.
  /sbin/checkproc -p $PidFile $ZABBIX_AGENTD_BIN
  # NOTE: rc_status knows that we called this init script with
  # "status" option and adapts its messages accordingly.
  rc_status -v
  ;;
    probe)
  ## Optional: Probe for the necessity of a reload, print out the
  ## argument to this init script which is required for a reload.
  ## Note: probe is not (yet) part of LSB (as of 1.9)

  test $ZABBIX_AGENTD_CONFIG -nt $PidFile && echo reload
  ;;
    *)
  echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload|probe}"
  exit 1
  ;;
esac
rc_exit
