table of contents
- jessie 215-17+deb8u7
- jessie-backports 230-7~bpo8+2
- stretch 232-25+deb9u8
- testing 241-1
- stretch-backports 241-1~bpo9+1
- unstable 241-2
NAME¶systemd-notify - Notify service manager about start-up completion and other daemon status changes
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). An alternate way to check for this state is to call systemctl(1) with the is-system-running command. It will return "offline" if the system was not booted with systemd.-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)