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In the process of simultaneous operation of the same file by multiple processes, it is very easy to cause data confusion in the file, need to lock operation to ensure the integrity of the data, the file-based lock described here, called "File

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

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

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

Reprint please indicate source: http://blog.csdn.net/cywosp/article/details/300830151. Overview of the scenein the multi-threaded development, the mutex can be used to protect the critical resources and prevent inconsistent data, which is the most

Table header file #include Defines the function int flock (int fd,int operation);The function description flock () does various locking or unlocking actions on the file that the parameter FD refers to in the manner specified by the parameter

Bool flock (int handle, int operation [, int & wouldblock]);The handle of the flock () operation must be an opened file pointer. Operation can be one of the following values:1. To obtain the shared Lock (read program), set operation to LOCK_SH (PHP 4

Pitfalls in crond using the flock command You need to execute a PHP script on a regular basis. The first thought is to use the crond command to implement this function. However, a strange thing was found during the execution of crond. The

In general, the Flock browser is not designed for ordinary Internet users like you and me. The browser that released version 2.5 today is specially designed for the most avid 25% network users. Generally, we seldom see browser manufacturers not

Questions about flock in PHP On Flock's question, I was on the blog as a whole, http://www.shionco.com/archives/php_flock.html Routine Code: $FD = fopen ('./a.html ', ' WB '); if ($FD) { if (@flock ($FD, lock_ex| LOCK_NB)) { Echo ' unlocked,