linux man page for idle

IDLE(2) 						     Linux Programmer's Manual							   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 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.

COLOPHON
       This page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    1994-08-21								   IDLE(2)