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

6       systemd-socket-activate - Test socket activation of daemons
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SYNOPSIS

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

12       systemd-socket-activate may be used to launch a socket-activated
13       service program from the command line for testing purposes. It may also
14       be used to launch individual instances of the service program per
15       connection.
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17       The daemon to launch and its options should be specified after options
18       intended for systemd-socket-activate.
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20       If the --inetd option is given, the socket file descriptor will be used
21       as the standard input and output of the launched process. Otherwise,
22       standard input and output will be inherited, and sockets will be passed
23       through file descriptors 3 and higher. Sockets passed through
24       $LISTEN_FDS to systemd-socket-activate will be passed through to the
25       daemon, in the original positions. Other sockets specified with
26       --listen= will use consecutive descriptors. By default,
27       systemd-socket-activate listens on a stream socket, use --datagram and
28       --seqpacket to listen on datagram or sequential packet sockets instead
29       (see below).
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OPTIONS

32       -l address, --listen=address
33           Listen on this address. Takes a string like "2000" or
34           "127.0.0.1:2001".
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36       -a, --accept
37           Launch an instance of the service program for each connection and
38           pass the connection socket.
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40       -d, --datagram
41           Listen on a datagram socket (SOCK_DGRAM), instead of a stream
42           socket (SOCK_STREAM). May not be combined with --seqpacket.
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44       --seqpacket
45           Listen on a sequential packet socket (SOCK_SEQPACKET), instead of a
46           stream socket (SOCK_STREAM). May not be combined with --datagram.
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48       --inetd
49           Use the inetd protocol for passing file descriptors, i.e. as
50           standard input and standard output, instead of the new-style
51           protocol for passing file descriptors using $LISTEN_FDS (see
52           above).
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54       -E VAR[=VALUE], --setenv=VAR[=VALUE]
55           Add this variable to the environment of the launched process. If
56           VAR is followed by "=", assume that it is a variable–value pair.
57           Otherwise, obtain the value from the environment of
58           systemd-socket-activate itself.
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60       --fdname=NAME[:NAME...]
61           Specify names for the file descriptors passed. This is equivalent
62           to setting FileDescriptorName= in socket unit files, and enables
63           use of sd_listen_fds_with_names(3). Multiple entries may be
64           specifies using separate options or by separating names with colons
65           (":") in one option. In case more names are given than descriptors,
66           superfluous ones will be ignored. In case less names are given than
67           descriptors, the remaining file descriptors will be unnamed.
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69       -h, --help
70           Print a short help text and exit.
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72       --version
73           Print a short version string and exit.
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ENVIRONMENT VARIABLES

76       $LISTEN_FDS, $LISTEN_PID, $LISTEN_FDNAMES
77           See sd_listen_fds(3).
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79       $SYSTEMD_LOG_TARGET, $SYSTEMD_LOG_LEVEL, $SYSTEMD_LOG_TIME,
80       $SYSTEMD_LOG_COLOR, $SYSTEMD_LOG_LOCATION
81           Same as in systemd(1).
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EXAMPLES

84       Example 1. Run an echo server on port 2000
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86           $ systemd-socket-activate -l 2000 --inetd -a cat
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88       Example 2. Run a socket-activated instance of systemd-journal-
89       gatewayd(8)
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91           $ systemd-socket-activate -l 19531 /usr/lib/systemd/systemd-journal-gatewayd
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SEE ALSO

94       systemd(1), systemd.socket(5), systemd.service(5), systemd-run(1),
95       sd_listen_fds(3), sd_listen_fds_with_names(3), cat(1)
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99systemd 250                                         SYSTEMD-SOCKET-ACTIVATE(1)