Demonsaw Daemon

#!/bin/sh
#
#  Demonsaw_cli Daemon
#
#  This script creates a service out of demonsaw_cli
#
#  This script relies on "daemon" please use "apt-get install daemon" to install daemon
#  demonsaw_cli should be install at /opt/demonsaw/demonsaw_cli for this to work out of the box
#
#  remember to make this scrip and demonsaw_cli executable using chmod +x
#
#  Usage:
#  service demonsaw start|stop|restart|reload|status
#
#  Notice:
#  demonsaw.xml must be properly configured and permissioned prior to running the daemon
#  please configure demonsaw and test it using ./demonsaw_cli before attempting to start the daemon
#
# The daemon's name (to ensure uniqueness and for stop, restart and status)
name="demonsaw"
# The path of the client executable
# This must be the full path as symbolic pathing will not work in this situation
command="/opt/demonsaw/demonsaw_cli"
# Any command line arguments for the client executable
command_args=""
# The path of the daemon executable
# use "where daemon" to find the path where daemon was installed however this should work
# for any debian based system
daemon="/usr/bin/daemon"

[ -x "$daemon" ] || exit 0
[ -x "$command" ] || exit 0

# Note: The following daemon option arguments could be in /etc/daemon.conf
# instead. That would probably be better because if the command itself were
# there as well then we could just use the name here to start the daemon.
# Here's some code to do it here in case you prefer that.

# Any command line arguments for the daemon executable (when starting)
daemon_start_args="" # e.g. --inherit --env="ENV=VAR" --unsafe
# The pidfile directory (need to force this so status works for normal users)
pidfiles="/var/run"
# The user[:group] to run as (if not to be run as root)
user=""
# The path to chroot to (otherwise /)
chroot=""
# The path to chdir to (otherwise /)
chdir=""
# The umask to adopt, if any
umask=""
# The syslog facility or filename for the client's stdout (otherwise discarded)
stdout="/opt/demosaw/daemon.info"
# The syslog facility or filename for the client's stderr (otherwise discarded)
stderr="/opt/demonsaw/daemon.err"

case "$1" in
    start)
        # This if statement isn't strictly necessary but it's user friendly
        if "$daemon" --running --name "$name" --pidfiles "$pidfiles"
        then
            echo "$name is already running."
        else
            echo -n "Starting $name..."
            "$daemon" --respawn $daemon_start_args \
                --name "$name" --pidfiles "$pidfiles" \
                ${user:+--user $user} ${chroot:+--chroot $chroot} \
                ${chdir:+--chdir $chdir} ${umask:+--umask $umask} \
                ${stdout:+--stdout $stdout} ${stderr:+--stderr $stderr} \
                -- \
                "$command" $command_args
            echo done.
        fi
        ;;

    stop)
        # This if statement isn't strictly necessary but it's user friendly
        if "$daemon" --running --name "$name" --pidfiles "$pidfiles"
        then
            echo -n "Stopping $name..."
            "$daemon" --stop --name "$name" --pidfiles "$pidfiles"
            echo done.
        else
            echo "$name is not running."
        fi
        ;;

    restart|reload)
        if "$daemon" --running --name "$name" --pidfiles "$pidfiles"
        then
            echo -n "Restarting $name..."
            "$daemon" --restart --name "$name" --pidfiles "$pidfiles"
            echo done.
        else
            echo "$name is not running."
            exit 1
        fi
        ;;

    status)
        "$daemon" --running --name "$name" --pidfiles "$pidfiles" --verbose
        ;;

    *)
        echo "usage: $0 <start|stop|restart|reload|status>" >&2
        exit 1
esac

exit 0