Skip to content

Instantly share code, notes, and snippets.

@kisom
Created April 28, 2013 06:10
Show Gist options
  • Select an option

  • Save kisom/5476066 to your computer and use it in GitHub Desktop.

Select an option

Save kisom/5476066 to your computer and use it in GitHub Desktop.

Revisions

  1. kisom created this gist Apr 28, 2013.
    158 changes: 158 additions & 0 deletions mydaemon
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,158 @@
    #! /bin/sh
    ### BEGIN INIT INFO
    # Provides: mydaemon
    # Required-Start: $remote_fs $syslog
    # Required-Stop: $remote_fs $syslog
    # Default-Start: 2 3 4 5
    # Default-Stop: 0 1 6
    # Short-Description: mydaemon does stuff
    # Description: this is an actual executable script, and should be saved in
    # /etc/init.d/mydaemon.
    ### END INIT INFO

    # Author: Kyle Isom <kyle@gokyle.net>
    #
    # Do NOT "set -e"

    ## This is the last section you should need to change anything in.
    # PATH should only include /usr/* if it runs after the mountnfs.sh script
    PATH=/sbin:/usr/sbin:/usr/local/sbin:/bin:/usr/bin:/usr/local/bin
    DESC="my daemon does stuff"
    NAME=logsrv
    DAEMON=/usr/local/bin/$NAME
    DAEMON_ARGS="" # you can pass any flags to your program here
    PIDFILE=/var/run/$NAME.pid
    SCRIPTNAME=/etc/init.d/$NAME

    # 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 (>= 3.2-14) to ensure that this file is present
    # and status_of_proc is working.
    . /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 --background --start --quiet --pidfile $PIDFILE \
    --exec $DAEMON --test > /dev/null \
    || return 1
    start-stop-daemon --start --quiet --pidfile $PIDFILE --background \
    --exec $DAEMON -- $DAEMON_ARGS \
    || return 2
    # Add code here, if necessary, that waits for the process to be ready
    # to handle requests from services started subsequently which depend
    # on this one. As a last resort, sleep for some time.
    }

    #
    # 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 --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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
    status)
    status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
    ;;
    #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|status|restart|force-reload}" >&2
    exit 3
    ;;
    esac

    :
    31 changes: 31 additions & 0 deletions mydaemon.conf
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,31 @@
    # skeleton upstart script for Go daemons. you should save this in /etc/init with
    # the name of your program .conf (for example, mydaemon.conf). It assumes you've
    # installed to /usr/local/bin, but that is changeable. Also, note that if your
    # program has any underscores in the name, they should be danged to hyphens in
    # this filename. For example, if the program was my_daemon, this should be named
    # my-daemon.conf.
    description "mydaemon does stuff"
    author "Kyle Isom <kyle@gokyle.net>"

    # Stanzas
    #
    # Stanzas control when and how a process is started and stopped
    # See a list of stanzas here: http://upstart.ubuntu.com/wiki/Stanzas#respawn

    # When to start the service (you probably don't need to change this)
    start on runlevel [2345]

    # When to stop the service (you probably don't need to change this)
    stop on runlevel [016]

    # Automatically restart process if crashed
    respawn

    # Run before process
    pre-start script
    # if your program needs anything done before it starts, this is the
    # place to do it.
    end script

    # Start the process
    exec /usr/local/bin/mydaemon