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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_TIME, $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), systemd-run(1), sd_listen_fds(3),
sd_listen_fds_with_names(3), cat(1)
systemd 249 SYSTEMD-SOCKET-ACTIVATE(1)
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On Apache
Under GNU General Public License
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