wifsignaled

Wifexited/wexitstatus/wifsignaled if the exit status value (* Note program termination: :) of the childprocess is zero, then the status value reported by 'waitpid 'or 'wait' is also zero. you can test for other kinds of information encoded inthe

When a process is normal or abnormally terminated, the kernel sends a SIGCHLD signal like its parent process because the child process is an asynchronous event, so this signal is also the asynchronous notification that the kernel sends to that

Before studying the wait and WAITPID functions, I was puzzled by the use of macro wifexited to check the resulting process termination state: Typically we exit by calling the exit or _exit function in the program. So the terminating state of the

Original URL: http://blog.csdn.net/jifengszf/article/details/3067841"Waitpid system call"Function Description:Wait for the process to change its state. All of the following calls are used to wait for a change in the state of the child process to get

Turn from: http://blog.csdn.net/anxuegang/article/details/6636400 Waitpid system Call "Function Description:Waits for the process to change its state. All of the following calls are used to wait for a change in the state of the child process to

I. botnets When a child process exits, the kernel sends a sigchld signal to the parent process. The exit of the child process is an asynchronous event (the child process can be terminated at any time when the parent process is running)When a child

C language programming in Linux-Process Creation Author: Hoyt 1. Process Concept The Linux operating system is intended for multiple users. At the same time, many users can issue various commands to the operating system. How does the operating

If the child process ends before the parent process, the parent process calls the wait () function and does not call the wait () function to produce two different results: -- if the parent process does not call wait () and waitpid () function, the

2) Introduction to Linux programming--process Introduction to the creation of a process under Linux preface: This article is used to describe the various concepts that are related to processes under Linux. We will learn: the process of conceptual

Understanding the principles of process control is very important for understanding and modifying Fio project . "Fio is an I/O tool meant to being used both for benchmark and stress/hardware verification."ProcessUnix provides a lot of system calls