pid fork

Concurrent ServerFirst of all, let's assume that there are two types of servers: first, the first connection request processing time is 1s, the 50th connection request processing time is 50s, the 100th connection request processing time is 100s.

Orphan process: One parent process exits, and one or more of its child processes are still running, then those child processes will become orphans. The orphan process will be adopted by the INIT process (process number 1) and the Init process

2015.1.29When the parent process waits for a child process to terminate, it must call the wait function. If a process waits for the parent process to terminate, you can do the following: The disadvantage is that CPU time is wastedwhile (Getppid ()! =

In this book, the fork Standard & amp; 26684; formula is pid_tpid; if (pid = fork () in this book, the standard format when fork is used is Pid_t pid; If (pid = fork () {} Else if (pid = 0) // sub-process {} Else // parent process

Programming Method of the Linux daemon ShoushouDaemon is a special process running in the background. It is independent of the control terminal and periodically executes a task or waits to process some events. Daemon is a very useful process.Most

Clamav AntiVirus software source code analysis notes [4] Hedgehog @ http://blog.csdn.net/littlehedgehog [Process backend] After Clamd has prepared work arrangements in the early stage, it will be transferred to the back-to-the-scenes for

Understanding of fork () functions, and understanding of fork FunctionsAuthor:Wang Shanshan, a lecturer at Huaqing vision embedded College. For those who are new to Unix/Linux operating systems and Write multi-process programs in Linux, fork is one

  In Unix systems, the only way to create a new process is to call the fork system. The process called fork is called the parent process, and the newly created process is called the child process. Syntax format of system call: PID = fork (); When

Daemon is a special process running in the background. It is independent of the control terminal and periodically executes a task or waits to process some events. Daemon is a very useful.Most Linux servers are implemented using daemon. For example,

Programming Method of the Linux daemon Daemon is a special process running in the background. It is independent of the control terminal and periodically executes a task or waits to process some events. Daemon is a very useful process. Most Linux

Waiting processStarting mode: Initiated by the startup script under the/ETC/RD.D directory at system startup Booting with the inetd Super server Cron command starts at timed time and starts with nohup command in terminal Key to

http://blog.csdn.net/zg_hover/article/details/2553321http://blog.csdn.net/kongdefei5000/article/details/8808147A daemon (Daemon) is a special process that runs in the background. It is independent of the control terminal and periodically performs

In the previous study, our service can only serve one client at a time, even if the accept () function is included in the loop, it can only serve multiple clients sequentially, and there is no concurrency service capability, which is obviously

Category: C/Concept: Daemon (Daemon) is a special process running in the background. It is independent of the control terminal and periodically performs some sort of task or waits to handle certain occurrences. Daemons are a very useful process.

Programming methods for the Linux daemonA daemon (Daemon) is a special process that executes in the background. It is independent of the control terminal and periodically performs some sort of task or waits for some event to occur. Daemons are a

Programming methods for the Linux daemonA daemon (Daemon) is a special process that executes in the background. It is independent of the control terminal and periodically performs some sort of task or waits for some event to occur. Daemons are a

programming methods for the Linux daemona daemon (Daemon) is a special process that runs in the background. It is independent of the control terminal and periodically performs some sort of task or waits to handle certain occurrences. Daemons are a

Developing the Linux background service processLinux Daemon Programming methodA daemon (Daemon) is a special process that runs in the background. It is independent of the control terminal and periodically performs some sort of task or waits to

Linux DaemonDaemon (Daemon) It is carried out in a specific process background.Event. Daemons are a very practical process. Most of Linux's servers are implemented with daemon processes. Example. INTERNETSERVERINETD,WEBSERVERHTTPD and so on. At the

In Linux, fork is used to create a sub-process, which has the following characteristics:1) executes once, returns 2 times, its return value in the parent process is the PID of the child process, and the return value in the child process is 0. The