NAME

       idle - make process 0 idle

SYNOPSIS

       #include <unistd.h>

       [[deprecated]] 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.

STANDARDS

       Linux.

HISTORY

       Removed in Linux 2.3.13.