fcntl

Detailed description of fcntl functions for file control and fcntl functions for control Abstract:This article mainly discusses the basic application of the fcntl function for file control. the dup function can copy file descriptors, while the fcntl

Abstract:This article mainly discusses the basic application of the fcntl function for file control. the DUP function can copy file descriptors, while the fcntl function is similar to the DUP function. in addition, it provides more powerful

Sys/types. h Is the header file of the basic system data type of Unix/Linux systems, including size_t, time_t, pid_t and other types. The application source file contains to access the definition of _ lp64 and _ ilp32. This header file also

Refer to the differences between FCNTL (), LOCKF, flock in LinuxWhat is the difference between these three functions , which are all about locking up a file?First flock and fcntl are system calls, and LOCKF is a library function . LOCKF is actually

Differences between fcntl (), lockf, and flock in linux. What are the differences between fcntl (), lockf, and flock in linux? what are the differences between fcntl (), lockf, and flock? the functions of lvyilong316 are used to lock files? First,

Function Description: Manipulate file characteristics According to the file description.#include #include int fcntl (int fd, int cmd);int fcntl (int fd, int cmd, long arg);int fcntl (int fd, int cmd, struct flock *lock);DescriptionFCNTL () provides

Transferred from: http://www.cnblogs.com/lonelycatcher/archive/2011/12/22/2297349.htmlFunction Description: Manipulate file characteristics According to the file description.#include #include int fcntl (int fd, int cmd);int fcntl (int fd, int cmd,

fcntl和select函数彻底搞明白 第一、fcntl函数详细使用        fcntl有强大的功能，它能够复制一个现有的描述符，获得/设置文件描述符标记，获得/设置文件状态标记，获得/设置异步I/O所有权，获得/设置纪录锁。 当多个用户共同使用，操作一个文件的情况，Linux通常采用的方法就是给文件上锁，来避免共享资源产生竞争的状态。 fcntl文件锁有两种类型：建议性锁和强制性锁        

I. fcntl Functions Function: manipulate the file descriptor to change the attributes of an opened file. Int fcntl (int fd, int cmd,.../* Arg */); The cmd value can be as follows: Copy file descriptorF_dupfd (long) Set/Get file descriptor

The difference between fcntl (), LOCKF, and Flock in Linux The difference between fcntl (), LOCKF and Flock--lvyilong316 What is the difference between these three functions, which are all about locking up a file? First flock and Fcntl are system

Linux Network Programming-file attributes fcntl Function /* Use the fcntl control file operator */# include # Include # Include Int main (void) {int flags =-1; int accmode =-1;/* Get the status of the standard input

Name------------Fcntlint fcntl (int fd, int cmd, .../*arg*/)----------------The manipulate file descriptor/* action Descriptor */To include a header file:#include #include The function performs one of the operations described below on the open file

FcntlFunction Description: Manipulate the attributes of the file according to the file description.#include #include int fcntl (int fd, int cmd);int fcntl (int fd, int cmd, long arg);int fcntl (int fd, int cmd, struct flock

First flock and Fcntl are system calls, and LOCKF are library functions. LOCKF is actually a fcntl package, so the LOCKF and Fcntl are the same, and the effect of locking the file is the same. The Fcntl and LOCKF are put together in most cases when

(1) Fcntl function description The previous 5 basic functions enable the opening of the file, read and write basic operations, this section will discuss how the file has been shared in the case of how to operate, that is, when more than

Add a lock--fcntl module to a file in PythonImport FcntlOpen a file# #当前目录下test文件要先存在, if not present will error. or open it in a written way.f = open ('./test ')Encrypt the file:Fcntl.flock (F,fcntl. LOCK_EX)This locks the file test, and if there

Function Description: Manipulate file characteristics According to the file description.File Control function FcntlHeader file:#include #include Function Prototypes:int fcntl (int fd, int cmd);int fcntl (int fd, int cmd, long arg);int fcntl (int fd,

Function Description: describes the features of a file based on its description.File control functionsFcntl -- file control LibraryStandard C library (libc,-LC) Synopsis# Include ;Int fcntl (int fd, int cmd );Int fcntl (int fd, int cmd, long Arg

File control functionsFunction Description: describes the features of a file based on its description.# Include ;Int fcntl (int fd, int cmd );Int fcntl (int fd, int cmd, long Arg );Int fcntl (int fd, int cmd, struct flock * Lock );[Description]Fcntl

Use the following method to set the socket to non-blocking intflagsfcntl (socket, F_GETFL, 0); fcntl (socket, F_SETFL, flags | O_NONBLOCK ); set the socket to non-blocking intflagsfcntl (socket, F_GETFL ,... Use the following method to set the