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neurocis/app_as_screened_init.sh

Created December 4, 2014 03:25
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  1. neurocis created this gist Dec 4, 2014.
    150 changes: 150 additions & 0 deletions app_as_screened_init.sh
    View file
    Original file line number Diff line number Diff line change
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    #! /bin/sh
    ### BEGIN INIT INFO
    # Provides: {service name here}
    # Required-Start: $remote_fs
    # Required-Stop: $remote_fs
    # Default-Start: 2 3 4 5
    # Default-Stop: 0 1 6
    # Short-Description: {Short Desc}
    # Description: {Long Desc}
    ### END INIT INFO

    # Author: Pavel A. Karoukin <[email protected]>
    # Author: Leigh Phillips <[email protected]>

    # Do NOT "set -e"

    # PATH should only include /usr/* if it runs after the mountnfs.sh script
    PATH=/sbin:/usr/sbin:/bin:/usr/bin
    DESC="{Description}"
    NAME="{Name}"
    DAEMON="{full path and executable of daemon}"
    DAEMON_ARGS="{any special arguments to pass to DAEMON}"
    DAEMON_ARGS_STOP="{any special arguments to pass for controlled STOP of DAEMON}"
    PIDFILE=/var/run/$NAME.pid
    SCRIPTNAME=/etc/init.d/$NAME
    CHUID={UID}:{GID}

    # Exit if the package is not installed
    [ -x "$DAEMON" ] || exit 0

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

    # Load the VERBOSE setting and other rcS variables
    . /lib/init/vars.sh

    # Define LSB log_* functions.
    # Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
    . /lib/lsb/init-functions

    #
    # Function that starts the daemon/service
    #
    do_start()
    {
    # Return
    # 0 if daemon has been started
    # 1 if daemon was already running
    # 2 if daemon could not be started
    start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
    || return 1
    start-stop-daemon --start --quiet --chuid $CHUID --pidfile $PIDFILE --exec $DAEMON -- \
    $DAEMON_ARGS \
    || return 2
    }

    #
    # Function that stops the daemon/service
    #
    do_stop()
    {
    # Return
    # 0 if daemon has been stopped
    # 1 if daemon was already stopped
    # 2 if daemon could not be stopped
    # other if a failure occurred
    start-stop-daemon --start --quiet --chuid $CHUID --pidfile $PIDFILE --exec $DAEMON -- $DAEMON_ARGS_STOP
    start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
    RETVAL="$?"
    [ "$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 --exec $DAEMON
    [ "$?" = 2 ] && return 2
    # Many daemons don't delete their pidfiles when they exit.
    rm -f $PIDFILE
    return "$RETVAL"
    }

    #
    # Function that sends a SIGHUP to the daemon/service
    #
    do_reload() {
    #
    # If the daemon can reload its configuration without
    # restarting (for example, when it is sent a SIGHUP),
    # then implement that here.
    #
    start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
    return 0
    }

    case "$1" in
    start)
    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
    do_start
    case "$?" in
    0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
    2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
    stop)
    [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
    do_stop
    case "$?" in
    0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
    2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
    #reload|force-reload)
    #
    # If do_reload() is not implemented then leave this commented out
    # and leave 'force-reload' as an alias for 'restart'.
    #
    #log_daemon_msg "Reloading $DESC" "$NAME"
    #do_reload
    #log_end_msg $?
    #;;
    restart|force-reload)
    #
    # If the "reload" option is implemented then remove the
    # 'force-reload' alias
    #
    log_daemon_msg "Restarting $DESC" "$NAME"
    do_stop
    case "$?" in
    0|1)
    do_start
    case "$?" in
    0) log_end_msg 0 ;;
    1) log_end_msg 1 ;; # Old process is still running
    *) log_end_msg 1 ;; # Failed to start
    esac
    ;;
    *)
    # Failed to stop
    log_end_msg 1
    ;;
    esac
    ;;
    *)
    #echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
    echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
    exit 3
    ;;
    esac