systemd Developer Zbigniew Jędrzejewski-Szmek zbyszek@in.waw.pl systemd-activate 8 systemd-activate Test socket activation of daemons /usr/lib/systemd/systemd-activate OPTIONS daemon OPTIONS systemd-activate can be used to launch a socket-activated daemon from the command line for testing purposes. It can also be used to launch single instances of the daemon per connection (inetd-style). The daemon to launch and its options should be specified after options intended for systemd-activate. If the -a option is given, file descriptor of the connection 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-activate will be passed through to the daemon, in the original positions. Other sockets specified with --listen will use consecutive descriptors. By default, systemd-activate listens on a stream socket, use --datagram to listen on a datagram socket instead (see below). -l address --listen=address Listen on this address. Takes a string like 2000 or 127.0.0.1:2001. -a --accept Launch a separate instance of daemon per connection and pass the connection socket as standard input and standard output. -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. -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-activate itself. --fdname=NAME Specify a name for the activation file descriptors. This is equivalent to setting FileDescriptorName= in socket unit files, and enables use of sd_listen_fds_with_names3. $LISTEN_FDS $LISTEN_PID $LISTEN_FDNAMES See sd_listen_fds3. $SYSTEMD_LOG_TARGET $SYSTEMD_LOG_LEVEL $SYSTEMD_LOG_COLOR $SYSTEMD_LOG_LOCATION Same as in systemd1. $ /usr/lib/systemd/systemd-activate -l 2000 -a cat $ /usr/lib/systemd/systemd-activate -l 19531 /usr/lib/systemd/systemd-journal-gatewayd systemd1, systemd.socket5, systemd.service5, sd_listen_fds3, sd_listen_fds_with_names3, cat1