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.

COLOPHON

   This page is part of release 4.09 of the Linux  man-pages  project.   A
   description  of  the project, information about reporting bugs, and the
   latest    version    of    this    page,    can     be     found     at
   https://www.kernel.org/doc/man-pages/.

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