IDLE(2)                   (2012-12-31)                    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 5.10 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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