RDIST tool notify option

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systemd-notify

SYSTEMD-NOTIFY(1)						  systemd-notify						 SYSTEMD-NOTIFY(1)

NAME

       systemd-notify - Notify service manager about start-up completion and other daemon status changes

SYNOPSIS

       systemd-notify [OPTIONS...] [VARIABLE=VALUE...]

DESCRIPTION

       systemd-notify may be called by daemon scripts to notify the init system about status changes. It can be used to send arbitrary
       information, encoded in an environment-block-like list of strings. Most importantly it can be used for start-up completion notification.

       This is mostly just a wrapper around sd_notify() and makes this functionality available to shell scripts. For details see sd_notify(3).

       The command line may carry a list of environment variables to send as part of the status update.

       Note that systemd will refuse reception of status updates from this command unless NotifyAccess=all is set for the service unit this
       command is called from.

OPTIONS

       The following options are understood:

       -h, --help
	   Prints a short help text and exits.

       --version
	   Prints a short version string and exits.

       --ready
	   Inform the init system about service start-up completion. This is equivalent to systemd-notify READY=1. For details about the semantics
	   of this option see sd_notify(3).

       --pid=
	   Inform the init system about the main PID of the daemon. Takes a PID as argument. If the argument is omitted, the PID of the process
	   that invoked systemd-notify is used. This is equivalent to systemd-notify MAINPID=$PID. For details about the semantics of this option
	   see sd_notify(3).

       --status=
	   Send a free-form status string for the daemon to the init systemd. This option takes the status string as argument. This is equivalent
	   to systemd-notify STATUS=.... For details about the semantics of this option see sd_notify(3).

       --booted
	   Returns 0 if the system was booted up with systemd, non-zero otherwise. If this option is passed, no message is sent. This option is
	   hence unrelated to the other options. For details about the semantics of this option, see sd_booted(3).

       --readahead=
	   Controls disk read-ahead operations. The argument must be a string, and either "cancel", "done" or "noreplay". For details about the
	   semantics of this option see sd_readahead(3).

EXIT STATUS

       On success, 0 is returned, a non-zero failure code otherwise.

EXAMPLE

       Example 1. Start-up Notification and Status Updates

       A simple shell daemon that sends start-up notifications after having set up its communication channel. During runtime it sends further
       status updates to the init system:

	   #!/bin/bash

	   mkfifo /tmp/waldo
	   systemd-notify --ready --status="Waiting for data..."

	   while : ; do
		   read a < /tmp/waldo
		   systemd-notify --status="Processing $a"

		   # Do something with $a ...

		   systemd-notify --status="Waiting for data..."
	   done

SEE ALSO

       systemd(1), systemctl(1), systemd.unit(5), sd_notify(3), sd_booted(3)

systemd 208															 SYSTEMD-NOTIFY(1)

UNIX for Advanced & Expert Users