process control book

After a child process is created using the fork function, the child process usually calls one exec function to execute another program. When a process calls an exec function, the Program executed by the process is completely replaced with a new program, and the new program is executed from its main function. Because ca

automatically becomes the background process group1.3 Sessions (session)A. A collection of one or more process groups.B. A session can have a control terminal.C. Establishing a session that connects to the control terminal the first process is called the

Before the introduction of the PCB (Process Control block), the first implementation of a ' progress bar ', and then according to the program written to analyze the specific PCB implementation principles. The ' progress bar ' function is able to be displayed in a single line, while the progress bar has a dynamic growth change, to know the ratio in the progress bar, but also need to be able toShows you know

;}});} /** * Delete Data collection * @param collection * @param tmp * @return successfully returned data collection, failed to return-1 */function removecollection (Collec tion,tmp) { //var tmp = {username: ' Hello ', password:1}; Collection.remove (Tmp,{safe:true},function (err, Count) { if (err) {Console.log (' Delete data collection failed ' +tmp); return-1;} else {console.log (' Delete data collection succeeded ' +count); return collection;} });}5.async module solves the implementation of s

This article mainly introduces the PCNTL process Control of PHP pcntl_wait, has a certain reference value, now share to everyone, the need for friends can refer to pcntl_wait Introduction # source Official pcntl_wait-Wait or return fork of the subprocess status int pcntl_wait (int $status [, int $options = 0]) Wait function scraping the execution of the current proces