idle(2) System Calls Manual idle(2)
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.
Linux man-pages 6.7 2023-10-31 idle(2)
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