тестовая активация сокета демонов (Test socket activation of daemons)
Имя (Name)
systemd-socket-activate - Test socket activation of daemons
Синопсис (Synopsis)
systemd-socket-activate [OPTIONS...] daemon [OPTIONS...]
Описание (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).
Параметры (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.
Переменные окружения (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).
Примеры (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 /usr/lib/systemd/systemd-journal-gatewayd
Смотри также (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)
