Nov 17, 2005 · I am having a silly problem w/ sockets and fscanf right now. I'm writing a server which uses pthreads for its concurrency. When it gets a client it creates a new pthread to handle it. I then use fdopen to open the file descriptor returned from accept as a FILE. I then use setvbuf(fd, NULL, _IONBF, 0) to turn off buffering.

The Linux fdopen(3) man page indicates that for I/O streams it is often necessary for a fgetpos(3) call to be performed between switching from write to read modes and vice versa. Rather than try to explain why and when these special circumstances apply to an I/O stream, I'll just advise you to use two separate streams for reading and writing It waits here until a client contacts it. At that point, it receives a new socket, c, which it can use to communicate with this particular client. It uses the C function fdopen to turn the socket from a low-level file descriptor to a C-style FILE pointer. This will allow the use of fprintf later on. from the socket file descriptor using fdopen. After understanding I need two streams (one for reading and on for writing), now I'm able to send messages over socket using fprintf. Now the problem is the reception that I wanted to do with getline() function or similar. The big problem is I don't want it to block the RETURN VALUES. If successful, fdopen() returns a pointer to a stream. On failure, it returns a NULL pointer and errno is set to one of the following values: . EBADF . The fildes argument is not a valid file descriptor.. EINVAL . The value of the type argument is invalid.. EMFILE . Too many file descriptors are open in the calling process. By the way, socket.fdopen duplicates the descriptor, so it doesn't need to be explicitly discarded. The above code leaks rawfd. I'll accept a patch that adds an option to tell .fdopen to take ownership of the existing descriptor number. But because stale descriptors are perhaps the biggest source of bugs in asynchronous networking software, I Windows Sockets 2 is designed for use by C/C++ programmers. Familiarity with Windows networking is required. Run-time requirements. Windows Sockets 2 can be used on all Windows platforms. Where certain implementations or capabilities of Windows Sockets 2 platform restrictions do exist, they are clearly noted in the documentation. In this section The specified type must be compatible with the access method you used to open the file. If the file was opened with the O_APPEND flag, the stream mode must be a, a+, ab, a+b, or ab+.To use the fdopen() function you need a file descriptor. To get a descriptor use the POSIX function open().The O_APPEND flag is a mode for open().Modes for open() are defined in QSYSINC/H/FCNTL.

The Python interface is a straightforward transliteration of the Unix system call and library interface for sockets to Python's object-oriented style: the socket() function returns a socket object whose methods implement the various socket system calls. Parameter types are somewhat higher-level than in the C interface: as with read() and write() operations on Python files, buffer allocation

166 struct mnl_socket *mnl_socket_fdopen(int fd) 167 {168 int ret; 169 struct mnl_socket *nl; 170 struct sockaddr_nl addr; 171 socklen_t addr_len = sizeof (struct sockaddr_nl); 172 173 ret Format #define _POSIX_SOURCE #include FILE *fdopen(int fildes, const char * options); General description. Associates a stream with an open file descriptor. A stream is a pointer to a FILE structure that contains information about a file. A stream permits user-controllable buffering and formatted input and output. The Python interface is a straightforward transliteration of the Unix system call and library interface for sockets to Python's object-oriented style: the socket() function returns a socket object whose methods implement the various socket system calls. Parameter types are somewhat higher-level than in the C interface: as with read() and write() operations on Python files, buffer allocation Return the socket's file descriptor (a small integer). This is useful with select.select(). Under Windows the small integer returned by this method cannot be used where a file descriptor can be used (such as os.fdopen()). Unix does not have this limitation. socket.getpeername ¶ Return the remote address to which the socket is connected.

It waits here until a client contacts it. At that point, it receives a new socket, c, which it can use to communicate with this particular client. It uses the C function fdopen to turn the socket from a low-level file descriptor to a C-style FILE pointer. This will allow the use of fprintf later on.

Milwaukee 1/2 in. Drive SAE and 1/4 in. Drive Metric SHOCKWAVE Impact Duty Deep Well Socket Set (21-Piece) Model# 49-66-4484-49-66-4301 $ 124 96 $ 124 96. When implementing a TCP server this integer will be a file descriptor created by socket(2). Listening on a Socket. The main event loop will react to events on the listening socket by calling accept(2) or close(2) if the client has disconnected. To get started, we first create a socket, and then bind it to an address Dec 15, 2008 · Third and the last one, in consequence of the above differences, I can't fdopen() a socket descriptor, at least in unix sometimes it is helpful to use buffered I/O functions specially when communicating in text mode with CRLF ending, fdopen() and fgets() disabling buffer to allow immediate reception of strings helped me to get line by line Suppose instead that the open socket's file descriptor is passed to two calls to fdopen, to make two streams. The first call has second argument "w" and the second call has second argument "r". Nov 17, 2005 · I am having a silly problem w/ sockets and fscanf right now. I'm writing a server which uses pthreads for its concurrency. When it gets a client it creates a new pthread to handle it. I then use fdopen to open the file descriptor returned from accept as a FILE. I then use setvbuf(fd, NULL, _IONBF, 0) to turn off buffering.