systemd-socket-activate --version (return code: 0)
systemd 232
+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN
systemd-socket-activate --help (return code: 0)
systemd-socket-activate [OPTIONS...]
Listen on sockets and launch child on connection.
Options:
-h --help Show this help and exit
--version Print version string and exit
-l --listen=ADDR Listen for raw connections at ADDR
-d --datagram Listen on datagram instead of stream socket
--seqpacket Listen on SOCK_SEQPACKET instead of stream socket
-a --accept Spawn separate child for each connection
-E --setenv=NAME[=VALUE] Pass an environment variable to children
--fdname=NAME[:NAME...] Specify names for file descriptors
--inetd Enable inetd file descriptor passing protocol
Note: file descriptors from sd_listen_fds() will be passed through.