Changing the Process Id in linux

问题

Is it possible to change the process id in linux operating system. If anyone know, please tell me.

Requirement :actually i want to bring up the back ground process to fore ground , which is being run under the init. So if i can change the process id or parent process id of the process. i can achieve my goal.

回答1:

No, it's not possible to do such a thing on Unix. You might be able to use fork to achieve this effect, but you have to tell us what you are trying to achieve.

pid_t pid;

/* I want a new PID. */
pid fork();
if (pid == 0) {
    /* getpid() will show I've got a new PID. */
else
    _exit(0); /* Parent or check for -1 (tinfoil hat)

Obviously, like I said before, you "might" be able to use this.

回答2:

Short answer: No.

Long answer: pocess id's(PID) are generated by the system, and are unique, and generated when the app starts. You cannot control the way they are generated...

来源：https://stackoverflow.com/questions/6692667/changing-the-process-id-in-linux