MSG_NOSIGNAL is a flags used by some implementations of the Berkeley sockets API.
This flag requests that the implementation does not to send a SIGPIPE signal on errors on stream oriented sockets when the other end breaks the connection. The EPIPE error is still returned as normal.
Though it is in some Berkely sockets APIs (notable Linux) it does not exist in what some refer to as the reference implementation, FreeBSD lacks this option.
4 pages link to MSG_NOSIGNAL:
