idle(2) System Calls 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 Linux 2.3.13, this system call does not exist anymore.
STANDARDS
This function is Linux-specific, and should not be used in programs in-
tended to be portable.
Linux man-pages 6.03 2022-12-04 idle(2)
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