IDLE(2)

NAME
idle - make process 0 idle

SYNOPSIS
#include <unistd.h>

void 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 super-user 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.