socket.fromfd (fd, family, type, proto=0) ¶ Duplicate the file descriptor fd (an integer as returned by a file object’s fileno() method) and build a socket object from the result. Address family, socket type and protocol number are as for the socket() function above. The file descriptor should refer to a socket, but this is not checked

Handle multiple socket connections with fd_set and select FD_ZERO - Clear an fd_set FD_ISSET - Check if a descriptor is in an fd_set FD_SET - Add a descriptor to an fd_set FD_CLR - Remove a descriptor from an fd_set //set of socket descriptors fd_set readfds; //socket to set FD_SET( s , &readfds); select function. The select method takes a list of socket for monitoring them. Here is how : Socket Programming in C/C++ - GeeksforGeeks int new_socket= accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen); It extracts the first connection request on the queue of pending connections for the listening socket, sockfd, creates a new connected socket, and returns a new file descriptor referring to that socket. GSocket: GIO Reference Manual - GNOME g_socket_get_fd () int g_socket_get_fd (GSocket *socket); Returns the underlying OS socket object. On unix this is a socket file descriptor, and on Windows this is a Winsock2 SOCKET handle. This may be useful for doing platform specific or otherwise unusual operations on the socket. __WSAFDIsSet function (winsock.h) - Win32 apps | Microsoft®

FD_ZERO - Clear an fd_set FD_ISSET - Check if a descriptor is in an fd_set FD_SET - Add a descriptor to an fd_set FD_CLR - Remove a descriptor from an fd_set //set of socket descriptors fd_set readfds; //socket to set FD_SET( s , &readfds); select function. The select method takes a list of socket for monitoring them. Here is how :

Issue 12107: TCP listening sockets created without FD We might > reconsider this syscall in a couple years when we're sure it's implemented > correctly > - in the socketserver module, add a new set_socket_cloexec attribute to > BaseServer, which would do the right thing (i.e. create the socket with > SOCK_CLOEXEC if available, otherwise call fcntl(FD_CLOEXEC)), and in > TCPServer, call fcntl(FD The Windows network WSAAsyncSelect model with C program

In this example, when a 1 is returned, the FD_ISSET and the subsequent socket calls complete only once. n Indicates that multiple descriptors are waiting to be processed. In this example, when an n is returned, the FD_ISSET and subsequent code loops and completes the requests in …

Pointer to an fd_set structure containing the set of socket descriptors. The __WSAFDIsSet function determines whether the socket specified in the fd parameter is a member of that set. Return value. None. Remarks. Windows Phone 8: This function is supported for Windows Phone Store apps on Windows Phone 8 and later.