Manpages - idle.2

idle - make process 0 idle

  #include <unistd.h>

  int idle(void);

*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.

*idle*() never returns for process 0, and always returns -1 for a user process.

EPERM

Always, for a user process.

Since Linux 2.3.13, this system call does not exist anymore.

This function is Linux-specific, and should not be used in programs intended to be portable.

This page is part of release 5.13 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/.