basicsocket.sendmsg(mesg, flags=0, dest_sockaddr=nil, *controls) => numbytes_sent
Instance Public methods
sendmsg sends a message using sendmsg(2) system call in blocking manner.
mesg is a string to send.
flags is bitwise OR of MSG_* constants such as Socket::MSG_OOB.
dest_sockaddr is a destination socket address for connection-less socket. It should be a sockaddr such as a result of Socket.sockaddr_in. An Addrinfo object can be used too.
controls is a list of ancillary data. The element of controls should be Socket::AncillaryData or 3-elements array. The 3-element array should contains cmsg_level, cmsg_type and data.
The return value, numbytes_sent is an integer which is the number of bytes sent.
sendmsg can be used to implement send_io as follows:
1 2 3 4 5 6 7 | # use Socket::AncillaryData.ancdata = Socket::AncillaryData.int(:UNIX, :SOCKET, :RIGHTS, io.fileno)sock.sendmsg("a", 0, nil, ancdata)# use 3-element array.ancdata = [:SOCKET, :RIGHTS, [io.fileno].pack("i!")]sock.sendmsg("\0", 0, nil, ancdata) |
Please login to continue.