Daemonization

Pacha is able to run on the background with the --daemon-start flag. However, you may want to do this automatically in your environment.

Here is an example INIT script that you could use (modify to fit your needs):

#! /bin/sh
### BEGIN INIT INFO
# Provides:           pacha
# Required-Start:
# Required-Stop:
# Default-Start:      2 3 4 5
# Default-Stop:       0 1
# Short-Description:  Start the pacha daemon.
### END INIT INFO
#
# Copyright (c) 2010 Alfredo Deza, alfredodeza [at] gmail [dot] com
# Licence: MIT

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/bin/pacha
NAME=pacha
DESC="Pacha daemon"
LOGDIR=/var/log/pacha.log

test -f $DAEMON || exit 0

case "$1" in
  start)
    $DAEMON --daemon-start
    ;;
  stop)
    $DAEMON --daemon-stop
    ;;
  restart|force-reload)
    $DAEMON --daemon-stop && $DAEMON --daemon-start

    ;;
  *)
    N=/etc/init.d/$NAME
    echo "Usage: $N {start|stop}" >&2
    exit 1
    ;;
esac

exit 0

Foreground

The daemon process can also run on the foreground. This will effectively output all information to the terminal and the daemon itself will never detach from the console.

Having a foreground option enables a user to be able to run Pacha with tools such as Supervisor where the daemonization process is taken care of.

To exit from the foreground process you can issue a KeyboardInterrupt by doing Ctrl-C

It is safe to exit from the foreground process that way.

Daemon Status

A nice way to tell if the Pacha daemon is running, is to issue the --daemon-status command. What this does, is to check the PID file where the process ID is normally stored. If the file is not found (this usually is the case when the process is not running) or if the PID that is in a file is no longer there a message displays the information about it.

Permissions

No root permissions are needed in order to run Pacha processes. However, when you are trying to control files that have higher permissions than the user you are trying to run the Pacha daemon with, you might get into a situation where the daemon can’t interact with that file because of lack of permissions.

Try starting the daemon with enough permissions to work with the files you want.

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