man fcntl

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        

embedded Linux system Programming (ii)--File Descriptor control function fcntl Because the fcntl function is too flexible and complex, the fcntl function is listed separately from the file IO , which is easy to read in detail. The function

/DUP function: copy an existing handle to generate a new handle that is exactly the same as the "source handle feature" (that is, generate a new handle number, and associated with the same device)// Functions of the dup2 function: copy an existing

In the past two days, I learned about asynchronous notifications in . One of the fcntl () functions is that I cannot find them. I am very angry and search for them online, there is no good solution, Finally, a netizen gave me a answer: Because fcntl

The user interface for the Linux socket. This BSD-compatible socket is a unified interface between the user process and the Kernel network protocol stack, each protocol module belonging to a different protocol family, such as Pf_inet, Pf_ipx,

How to port programs containing flock to Solaris Author: BadcoffeeEmail: blog.oliver@gmail.comBlog:Http://blog.csdn.net/yayong2005Year5Month A friend's Linux source program contains the following calls:Flock (FD, lock_un) There is no problem in

1. Advanced socket functions getsockopt and setsockopt Int getsockopt (INT sockfd, int level, int optname, void * optval, socklen_t * optlen)Int setsockopt (INT sockfd, int level, int optname, const void * optval, socklen_t * optlen) LevelSpecifies

I have been reading books and taking some notes recently. The operating system used in this article is centos7.0. If you do not want to install a dual-system, you can install a virtual machine, refer to

1. Open File (Man 2 open View)int open (const char *pathname, int flags); //pathname file name (path); Flags open mode, O_rdonly, O_wronly, O_RDWRint open (const char *pathname, int flags, mode_t mode);This function is typically used to create new

  4-day OS installed... Haha, a lot of GAINS. Remember Master Steven S.Best references: 1. Master from the Internet. 2. Linux man command: Man 7 signal, MAN 7 socket. 3. UNP V1 Chapter 1.Article 1: Overview Signal-driven Io, not asynchronous