popen pid

Linux system () and Popen () Differences 1. Introduction to System () and Popen ()In Linux we can execute a shell command through system (), and Popen () executes shell commands and communicates through pipelines and shell commands.System (), Popen (

https://blog.csdn.net/liuxingen/article/details/47057539 Linux System () and Popen () differences 1. System () and Popen () Introduction In Linux we can execute a shell command through system (), and Popen () is also executing shell commands and

s under Linux we should try to avoid using system. Now let's look at a simple introduction to the system () function under Linux: #include int system (Const char* command) The system () function calls/bin/sh to execute the specified command of a

1. Fork + Exec Fork is used to create a child process. When a program calls the fork function, the system prepares the preceding three segments for a new process. First, the system allows the new process and the old process to use the same code

0, FILE *popen (const char *command, const char *type);The Popen function is equivalent to doing several things:1. Create a nameless pipe file2. Fork ()3, in the sub-process, EXEC command4, in the sub-process,if type = = "R", it is equivalent to:int

1. Fork + execFork is used to create a child process. When a program calls the fork function, the system prepares the previous three segments for a new process, first, the system allows the new process to use the same code snippet as the old process,

1, file* popen (const char* cmd,const char* type);int Pclose (file* stream);Popen () function fork () A child process that creates a pipeline for parent-child interprocess communication, which either reads from the pipe or writes to the pipe,

Today, I am working on a web page to control the memcached restart function. I thought it was very simple. I didn't get the pid, and then kill it. It's just that simple to restart memcached. I did not expect to use subprocess. Popen () to call the

Python version 2.5.4 (in later versions, Python advocates replacing OS. popen with subprocess. popen) OS. popen may cause blocking after a long wait. The solution is as follows: Def timeout_command (command, timeout ): "" Call shell-command and

Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->1 #! /Usr/bin/env python 2 # coding = UTF-8 3 # note that in the get_mem function, the splite column must correspond to your target 4 import OS 5