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)