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systemd-notify



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:

       --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).

       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 219 SYSTEMD-NOTIFY(1)



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