idle (2)

NAME

idle - make process 0 idle

SYNOPSIS

#include <unistd.h>
int idle(void);

DESCRIPTION

idle() is an internal system call used during bootstrap. It marks the process's pages as swappable, lowers its priority, and enters the main scheduling loop. idle() never returns.
Only process 0 may call idle(). Any user process, even a process with superuser permission, will receive EPERM.

RETURN VALUE

idle() never returns for process 0, and always returns -1 for a user process.

ERRORS

EPERM
Always, for a user process.

VERSIONS

Since Linux 2.3.13, this system call does not exist anymore.

CONFORMING TO

This function is Linux-specific, and should not be used in programs intended to be portable.

Information

Source
Linux kernel
OS/version
Linux
Source updated
December 31, 2012
Page created
February 9, 2018
Page generated
December 2, 2018