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| -rw-r--r-- | man2/idle.2 | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/man2/idle.2 b/man2/idle.2 new file mode 100644 index 0000000..197f366 --- /dev/null +++ b/man2/idle.2 @@ -0,0 +1,44 @@ +.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu) +.\" Portions extracted from linux/mm/swap.c: +.\" Copyright (C) 1991, 1992 Linus Torvalds +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" Modified 21 Aug 1994 by Michael Chastain <mec@shell.portal.com>: +.\" Added text about calling restriction (new in Linux 1.1.20 I believe). +.\" N.B. calling "idle" from user process used to hang process! +.\" Modified Thu Oct 31 14:41:15 1996 by Eric S. Raymond <esr@thyrsus.com> +.\" " +.TH idle 2 2023-03-30 "Linux man-pages 6.05.01" +.SH NAME +idle \- make process 0 idle +.SH SYNOPSIS +.nf +.B #include <unistd.h> +.PP +.B [[deprecated]] int idle(void); +.fi +.SH DESCRIPTION +.BR 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. +.BR idle () +never returns. +.PP +Only process 0 may call +.BR idle (). +Any user process, even a process with superuser permission, +will receive +.BR EPERM . +.SH RETURN VALUE +.BR idle () +never returns for process 0, and always returns \-1 for a user process. +.SH ERRORS +.TP +.B EPERM +Always, for a user process. +.SH STANDARDS +Linux. +.SH HISTORY +Removed in Linux 2.3.13. |