Sends a message on a socket. Attempts to send the scalar MSG to the SOCKET filehandle. Takes the same flags as the system call of the same name. On unconnected sockets you must specify a destination to send TO, in which case it does a Csendto. Returns the number of characters sent, or the undefined value if there is an error. The C system call sendmsg(2) is currently unimplemented. See"UDP: Message Passing" in perlipc for examples.
Note thecharacters: depending on the status of the socket, either (8-bit) bytes or characters are sent. By default all sockets operate on bytes, but for example if the socket has been changed using binmode() to operate with the:utf8 I/O layer (see"open", or theopen pragma,open), the I/O will operate on UTF-8 encoded Unicode characters, not bytes. Similarly for the:encoding pragma: in that case pretty much any characters can be sent.
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