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 sdnotify() and makes this
       functionality available to shell scripts. For details see sdnotify(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:

       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 sdnotify(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 sdnotify(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 sdnotify(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 sdbooted(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 sdreadahead(3).

       -h, help
           Print a short help text and exit.

       version
           Print a short version string and exit.

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), sdnotify(3), sdbooted(3)



systemd 219                                                  SYSTEMD-NOTIFY(1)