get process name from pid

In order to get the corresponding host structure (process descriptor) pointer from the given PID value quickly, the kernel adopts the structure of the PID hash list. First, the following questions to understand: 1) Why the PID hash list only defines

To say clear Systemd, you have to start with the Linux operating system started speaking. The startup of the Linux operating system starts with the BIOS, then the boot Loader loads into the kernel and initializes the kernel. The final step in kernel

For the ubuntu14.04 operating system, you can see the structure of the process control block in the/usr/src/linux-headers-4.4.0-31/include/linux/sched.h file, as followsstructtask_struct {volatile LongState/*-1 unrunnable, 0 runnable, >0 stopped*/

Application ScenariosIn the Linux operations environment, we often encounter the maintenance of multiple programs on the same server, involving program startup, shutdown and restart operations.Typically, there is an interdependent relationship

First, prefaceIn fact, two years ago, this site has a document about the process identity, but very simple, and the code is from the 2.6 kernel. With the introduction of the concepts of Linux container, PID namespace and so on, process

Proc is a virtual file system that is mounted on the/proc directory in a Linux system. Proc has several features, which include the ability for users to access kernel information or use it for troubleshooting, one of the most useful features that

1. Process PID, how to get our process number in the program to see the current process#-*-Coding:utf-8-*-from multiprocessing import processimport osimport timedef run_proc (): "" "The code to be executed by the child process" " Print ('

Original address: http://www.osronline.com/article.cfm? Id = 472           Over the years developers have needed or wanted to know the name of the image executing in a given process. Traditionally, this was often done usingPsgetprocessimagefile

Environment variable Operation function Char*getenv (const char* name); Get environment variable value Intputenv (cahr* str); A string of name=value, put it in the environment table, and delete its original definition if name already

Analyze the implementation of erlang process monitoring and erlang Process MonitoringErlang supports two monitoring methods: Monitor and Link, so that all processes can be integrated. When a process exits due to an error, the monitoring process