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Editing: init-d-script

#!/bin/sh
# See init-d-script(5) for instructions on how to use this library.
#=============================================================================

# Shift arguments early to fix #826214
__init_d_script_name="$1"
shift

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

# PATH should only include /usr/* if it runs after the mountnfs.sh
# script.  Scripts running before mountnfs.sh should remove the /usr/*
# entries.
PATH=/usr/sbin:/usr/bin:/sbin:/bin
export PATH

is_call_implemented() {
	command -V $1 > /dev/null 2>&1
}

do_usage() {
	if is_call_implemented do_reload ; then
		echo "Usage: $SCRIPTNAME {start|stop|status|reload|restart|try-restart|force-reload}" >&2
	else
		echo "Usage: $SCRIPTNAME {start|stop|status|restart|try-restart|force-reload}" >&2
	fi
}

call() {
	cmd="$1"
	shift
	if is_call_implemented ${cmd}_override ; then
	    ${cmd}_override "$@"
	else
            ${cmd} "$@"
        fi
}

#
# Function that starts the daemon/service
#

do_start_cmd() {
	start-stop-daemon --start --quiet --oknodo \
	    ${PIDFILE:+--pidfile ${PIDFILE}} $START_ARGS \
	    --startas $DAEMON --name ${COMMAND_NAME} --exec $DAEMON -- $DAEMON_ARGS
}

do_start()
{
	if is_call_implemented do_start_prepare ; then
		call do_start_prepare
	fi
	log_daemon_msg "Starting $DESC" "$NAME"
	call do_start_cmd
	retval=$?
	case ${retval} in
		0|1) vlog_end_msg 0 ;;
		2)   vlog_end_msg 1 ;;
	esac
	if is_call_implemented do_start_cleanup ; then
		call do_start_cleanup
	else
		return ${retval}
	fi
}

#
# Function that stops the daemon/service
#

do_stop_cmd() {
	start-stop-daemon --stop --quiet --oknodo --retry=TERM/30/KILL/5 \
	    $STOP_ARGS \
	    ${PIDFILE:+--pidfile ${PIDFILE}} --name ${COMMAND_NAME} --exec $DAEMON
	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 \
	    $STOP_ARGS \
	    --exec $DAEMON
	[ "$?" = 2 ] && return 2
	# Many daemons don't delete their pidfiles when they exit.
	rm -f $PIDFILE
	return $RETVAL
}

do_stop()
{
	if is_call_implemented do_stop_prepare ; then
		call do_stop_prepare
	fi
	vlog_daemon_msg "Stopping $DESC" "$NAME"
	call do_stop_cmd
	retval=$?
	case ${retval} in
		0|1) vlog_end_msg 0 ;;
		2)   vlog_end_msg 1 ;;
	esac
	if is_call_implemented do_stop_cleanup ; then
		call do_stop_cleanup
	else
		return ${retval}
	fi
}

do_restart() {
	if is_call_implemented do_restart_prepare ; then
		call do_restart_prepare
	fi
	vlog_daemon_msg "Restarting $DESC" "$NAME"
	call do_stop_cmd
	call do_start_cmd
	retval=$?
	case ${retval} in
		0|1) vlog_end_msg 0 ;;
		2)   vlog_end_msg 1 ;;
	esac
	if is_call_implemented do_restart_cleanup ; then
		call do_restart_cleanup
	else
		return ${retval}
	fi
}

do_force_reload() {
	if is_call_implemented do_reload ; then
		call do_reload
	else
		call do_restart
	fi
}

# Enable this using
# alias do_reload=do_reload_sigusr1
do_reload_sigusr1() {
        if is_call_implemented do_reload_prepare ; then
            call do_reload_prepare
        fi
        log_daemon_msg "Reloading $DESC configuration files" "$NAME"
        start-stop-daemon --oknodo --stop --signal 1 --quiet \
          --pidfile "$PIDFILE" --exec "$DAEMON"
        log_end_msg $?
        if is_call_implemented do_reload_cleanup ; then
            call do_reload_cleanup
        fi
}

do_status() {
	# FIXME: Does it make sense to call `status_of_proc' if PIDFILE is
	# empty?
	status_of_proc "$DAEMON" "$NAME" ${PIDFILE:="-p ${PIDFILE}"}
}

if [ "$DEBUG" = "true" ] ; then
    set -x
fi

# Unset configuration variables to make sure that if variable is not assigned a
# value in init script, it does not use one from environment. See #822918.
unset DAEMON DAEMON_ARGS NAME COMMAND_NAME PIDFILE

SCRIPTNAME="$__init_d_script_name"
scriptbasename="$(basename "$__init_d_script_name")"
if [ "$scriptbasename" != "init-d-script" ] ; then
    . "$__init_d_script_name"
else
    exit 0
fi

NAME=${NAME:=$(basename $DAEMON)}
DESC=${DESC:=$NAME}
: ${COMMAND_NAME:=${NAME}}

# Do not use pid file if $PIDFILE is 'none'.  Otherwise, generate from
# $NAME or use the value provided by the init.d script.
if [ none = "$PIDFILE" ] ; then
    PIDFILE=
elif [ -z "$PIDFILE" ] ; then
    PIDFILE=/var/run/$NAME.pid
fi

# Read configuration variable file if it is present
[ -r "/etc/default/${NAME}" ] && . "/etc/default/${NAME}"

# Exit if the package is not installed
if [ none != "$DAEMON" ] && [ ! -x "$DAEMON" ] ; then
	exit 0
fi

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
if [ -t 0 ] ; then # Be verbose when called from a terminal
    VERBOSE=yes
fi

case "$1" in
  start)
	call do_start
	;;
  stop)
	call do_stop
	;;
  status)
	call do_status
	;;
  reload)
	if is_call_implemented do_reload ; then
		do_reload
	else
		call do_usage
		exit 3
	fi
	;;
  force-reload)
	call do_force_reload
	;;
  restart)
	call do_restart
	;;
  try-restart)
        log_daemon_msg "Trying to restart $DESC" "$NAME"
	if call do_status > /dev/null 2>&1 ; then
	    call do_restart
            log_end_msg $?
	else
	    log_progress_msg "is not running."
            log_end_msg 1
    	fi
	;;
  '')
	call do_usage
	exit 3
	;;
  *)
	if is_call_implemented do_unknown ; then
	    call do_unknown "$1"
	    exit 3
	else
	    call do_usage
	    exit 3
	fi
	;;
esac
exit $? # See https://bugs.debian.org/822753#53

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