sendmsg          1117 ext/socket/ancdata.c     return (void *)(VALUE)sendmsg(args->fd, args->msg, args->flags);
sendmsg           188 ext/socket/unixsocket.c     return sendmsg(arg->fd, &arg->msg, 0);
sendmsg           258 include/ruby/win32.h extern int    sendmsg(int, const struct msghdr *, int);