IDLE
NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO NOTES
idle - make process 0 idle
#include
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 super-user permission, will receive EPERM.
idle never returns for process 0, and always returns
EPERM
Always, for a user process.
This function is Linux-specific, and should not be used in programs intended to be portable.
Since 2.3.13 this system call does not exist anymore.
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