SYSTEMD-SOCKET-ACTIVATE(1)				      systemd-socket-activate					SYSTEMD-SOCKET-ACTIVATE(1)

NAME

       systemd-socket-activate - Test socket activation of daemons

SYNOPSIS

       systemd-socket-activate [OPTIONS...] daemon [OPTIONS...]

DESCRIPTION

       systemd-socket-activate may be used to launch a socket-activated service program from the command line for testing purposes. It may also be
       used to launch individual instances of the service program per connection.

       The daemon to launch and its options should be specified after options intended for systemd-socket-activate.

       If the --inetd option is given, the socket file descriptor 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-socket-activate will be passed through to the daemon, in the original positions. Other sockets specified
       with --listen= will use consecutive descriptors. By default, systemd-socket-activate listens on a stream socket, use --datagram and
       --seqpacket to listen on datagram or sequential packet sockets instead (see below).

OPTIONS

       -l address, --listen=address
	   Listen on this address. Takes a string like "2000" or "127.0.0.1:2001".

       -a, --accept
	   Launch an instance of the service program for each connection and pass the connection socket.

       -d, --datagram
	   Listen on a datagram socket (SOCK_DGRAM), instead of a stream socket (SOCK_STREAM). May not be combined with --seqpacket.

       --seqpacket
	   Listen on a sequential packet socket (SOCK_SEQPACKET), instead of a stream socket (SOCK_STREAM). May not be combined with --datagram.

       --inetd
	   Use the inetd protocol for passing file descriptors, i.e. as standard input and standard output, instead of the new-style protocol for
	   passing file descriptors using $LISTEN_FDS (see above).

       -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-socket-activate itself.

       --fdname=NAME[:NAME...]
	   Specify names for the file descriptors passed. This is equivalent to setting FileDescriptorName= in socket unit files, and enables use
	   of sd_listen_fds_with_names(3). Multiple entries may be specifies using separate options or by separating names with colons (":") in
	   one option. In case more names are given than descriptors, superfluous ones will be ignored. In case less names are given than
	   descriptors, the remaining file descriptors will be unnamed.

       -h, --help
	   Print a short help text and exit.

       --version
	   Print a short version string and exit.

ENVIRONMENT VARIABLES

       $LISTEN_FDS, $LISTEN_PID, $LISTEN_FDNAMES
	   See sd_listen_fds(3).

       $SYSTEMD_LOG_TARGET, $SYSTEMD_LOG_LEVEL, $SYSTEMD_LOG_COLOR, $SYSTEMD_LOG_LOCATION
	   Same as in systemd(1).

EXAMPLES

       Example 1. Run an echo server on port 2000

	   $ systemd-socket-activate -l 2000 --inetd -a cat

       Example 2. Run a socket-activated instance of systemd-journal-gatewayd(8)

	   $ systemd-socket-activate -l 19531 /lib/systemd/systemd-journal-gatewayd

SEE ALSO

       systemd(1), systemd.socket(5), systemd.service(5), sd_listen_fds(3), sd_listen_fds_with_names(3), cat(1)

systemd 237														SYSTEMD-SOCKET-ACTIVATE(1)