systemd-socket-activate 命令

常用示例

说明

systemd-socket-activate is a test and development tool for socket activation. It listens on sockets and launches a specified command when connections arrive, simulating systemd's socket activation feature without needing to configure full socket and service unit files. By default it listens on a stream (TCP) socket. Use --datagram for UDP or --seqpacket for sequential packet sockets. The activated program receives the socket file descriptors via the $LISTEN_FDS protocol (or via stdin/stdout in --inetd mode).

参数

-l _ADDRESS_, --listen=_ADDRESS_

Listen on the specified address (port number or host:port).

-a, --accept

Launch a new instance of the command for each connection. Cannot be combined with --now.

-d, --datagram

Listen on a datagram socket (SOCK_DGRAM) instead of a stream socket. Cannot be combined with --seqpacket.

--seqpacket

Listen on a sequential packet socket (SOCK_SEQPACKET) instead of a stream socket. Cannot be combined with --datagram.

-E _VAR=VALUE_, --setenv=_VAR=VALUE_

Set an environment variable for the launched process. If no value given, inherits from the current environment.

--fdname=_NAME:NAME..._

Specify names for the file descriptors passed. Enables use of sd_listen_fds_with_names(3).

--inetd

Use the inetd protocol for passing file descriptors (as stdin/stdout) instead of the $LISTEN_FDS protocol.

--now

Start the command immediately instead of waiting for a connection. Cannot be combined with --accept.

-h, --help

Display help information.

--version

Display version information.