systemd-activate — Test socket activation of daemons
/usr/lib/systemd/systemd-activate [OPTIONS...] daemon [OPTIONS...]
systemd-activate can be used to launch a socket activated daemon from the command line for testing purposes. It can also be used to launch single instances of the daemon per connection (inetd-style).
The daemon to launch and its options should be specifed after options intended for systemd-activate.
If the -a option is given, file descriptor
of the connection will be used as the standard input and output of
the launched process. Otherwise, standard input and output will be
inherited, and sockets will be passed through file descriptors 3
and higher. Sockets passed through $LISTEN_FDS
to systemd-activate will be passed through to
the dameon, in the original positions. Other sockets specified
with --listen will use consecutive descriptors.
-l address, --listen=address¶Listen on this address.
Takes a string like "2000" or
"127.0.0.1:2001".
-a, --accept¶Launch a separate instance of daemon per connection and pass the connection socket as standard input and standard output.
-E VAR[=VALUE], --setenv=VAR[=VALUE]¶Add this variable to the environment of the
launched process. If VAR is
followed by "=", assume that it is a
variable–value pair. Otherwise, obtain the value from the
environment of systemd-activate itself.
-h, --help¶--version¶$LISTEN_FDS, $LISTEN_PID¶See sd_listen_fds(3).
$SYSTEMD_LOG_TARGET, $SYSTEMD_LOG_LEVEL, $SYSTEMD_LOG_COLOR, $SYSTEMD_LOG_LOCATION¶Same as in systemd(1).
Example 2. Run a socket activated instance of systemd-journal-gatewayd(8)
$ /usr/lib/systemd/systemd-activate -l 19531 /usr/lib/systemd/systemd-journal-gatewayd