fork and exec example

What if we wanted to call 1 shell scripts or execute 1 Bash shell commands when we were writing 1 C programs? In fact, the header file contains 1 function system () that calls the shell command or script, and it is convenient to simply pass the

start a new process (systemfunction)The system () function can start a new process.int system (const char *string)The effect of this function is equivalent to executing the SH–C string.In general, using the system function is far from the ideal way

Original: http://blog.csdn.NET/nvd11/article/details/8856278What if we wanted to invoke 1 shell scripts or execute 1 Bash shell commands when we were writing 1 C programs?In fact, in this header contains 1 functions called the shell command or

Summary: three methods of executing shell scripts, fork, source and exec, are summarized.  Prerequisites 1. any program we run is a child process generated by the parent process. After the child process is completed, it is returned to the parent

The following system calls are required for process creation under the Unix/linux system: fork/execFork () copies a process into two processes: parent (old PID), child (new PID)EXEC () uses a new program to rewrite the current process: PID has not

When a thread calls a function fork, the entire process address space is copied to the child process, Copy-on-write is mentioned in section 8.3. A child process is a process that is completely different from the parent process, but if neither the

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

Turn from: http://blog.csdn.net/anxuegang/article/details/6658472 Preface:The EXCE call does not create a new process, so the process ID does not change, and exec simply replaces the body, data, heap, and stack segments of the current process with

This article mainly introduces the fork and exec processes in Python. This article uses examples to explain how to use fork () and describes eight exec-related methods, for more information about job concurrency in python, you can use process

When the thread calls fork, it creates a copy of the whole process address space for the child process. Recall interval. By inheriting copies of the entire address space, the child process also inherits the status of all mutex, read/write locks,