Xfcntl.c File Reference

Xfcntl() - manipulate a socket. More...

#include "Xsocket.h"

Functions
int	Xfcntl (int sockfd, int cmd,...)
	manipulate an Xsocket More...

Function Documentation

int Xfcntl	(	int	sockfd,
		int	cmd,
			...
	)

Xfcntl() performs a subset of the fcntl() system call supporting the operations described below on the open Xsocket sockfd. The operation is determined by cmd.

Xfcntl() can take an optional third argument. Whether or not this argument is required is determined by cmd. The required argument type is an int or void if the argument is not required.

Note

See the man page for the standard fcntl() call for more details.

Parameters

sockfd	a file descriptor create by Xsocket()
cmd	the command to execute F_GETFL: Get the socket's status flags F_SETFL: Set the socket's flags. Currently only O_NONBLOCK is supported. Other flags are ignored but do not cause an error.
arg	the flag to set if cmd == F_GETFL, otherwise omitted

Returns

socket flags if cmd == F_GETFL

0 on success if cmd == F_SETFL

-1 on error with errno set to an error compatible with those returned by the standard fcntl call.