systemd-notify(1) - phpMan

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:

       --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).

       --uid=USER
           Set the user ID to send the notification from. Takes a UNIX user name or numeric UID.
           When specified the notification message will be sent with the specified UID as sender,
           in place of the user the command was invoked as. This option requires sufficient
           privileges in order to be able manipulate the user identity of the process.

       --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).

       -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), sd_notify(3), sd_booted(3)



systemd 219                                                                     SYSTEMD-NOTIFY(1)

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