set group id

Basic attributes of a process: process ID, parent process ID, process group ID, session, and control terminal.Abstract:This document describes the basic attributes of a process, including process ID, parent process ID, process group ID, session, and

Basic attributes of a process: process ID, parent process ID, process group ID, session, and control terminalAbstract:This document describes the basic attributes of a process, including process ID, parent process ID, process group ID, session, and

Actual User ID (actual group ID): Identifies who the current user (belongs to) is and is taken from the password file when the user logs on.Valid user ID (valid group ID): Used to determine our (current process) access to the file (that is, the

Actual User (group) ID:Identifies who the user is, and the two fields are taken from the login entry in the password file when they log on.Valid user (group) ID:Determines access to the file, usually valid user (group) ID equals the actual user

1. Change the user ID and group ID 1.1. Set the user ID and group ID There are 6 or more IDs associated with the process, as shown below: Actual user ID Who are we actually? Actual group ID Valid user ID Used to

Every process has six or more IDs associated with it. These are shown in Figure 4.5. Figure 4.5. user IDs and group IDs associated with each process Real user IDReal group ID Who we really are Valid user IDValid

In the UNIX system, privileges, such as being able to change the system's notion of the current date, and access control, such as being able to read or write a particle file, are based on user and group IDs. when our programs need additional

Process Group ID operation, process group idZookeeper Process relationship Call format# Include Int setpgid (pid_t pid, pid_t pgid );Pid_t getpgid (pid_t pid ); Pid_t getpgrp (void);/* POSIX.1 version */Pid_t getpgrp (psid_t pid);/* BSD version

actual User id:Some articles refer to it as the real user ID, which is the ID when we log on to the UNIX system. Valid User ID: Defines the rights of the operator. A valid user ID is a property of a process that determines the access to the file

Transfer from http://blog.csdn.net/todd911/article/details/16370577In UNIX systems, privileges are based on user and group IDs, and when programs need to add privileges or need access to resources that are not currently allowed, we need to replace