.\"	$NetBSD: lfs_segwait.2,v 1.9 2017/05/14 12:30:37 wiz Exp $
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.\" Copyright (c) 2000 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Konrad Schroder.
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.Dd May 23, 2000
.Dt LFS_SEGWAIT 2
.Os
.Sh NAME
.Nm lfs_segwait
.Nd wait until a segment is written
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/types.h
.Ft int
.Fn lfs_segwait "fsid_t *fsidp" "struct timeval *tv"
.Sh DESCRIPTION
.Fn lfs_segwait
blocks until a new segment is acquired for writing by the file system
specified by
.Fa *fsidp
or if
.Fa *fsidp
is \-1, until a segment is acquired for writing by any LFS file system.
.Pp
If
.Fa timeout
is non-zero,
.Fn lfs_segwait
will return after
.Fa timeout
milliseconds regardless of whether a new segment has been designated for
writing or not.
.Sh RETURN VALUES
.Fn lfs_segwait
returns 0 if a new segment was acquired; 1 if it timed out; or \-1 on error.
.Sh ERRORS
An error return from
.Fn lfs_segwait
indicates:
.Bl -tag -width Er
.It Bq Er EFAULT
.Fa fsidp
points outside the process's allocated address space.
.It Bq Er EINTR
A signal was delivered before the time limit expired and
before a new segment was designated for writing.
.It Bq Er EINVAL
The specified time limit is negative.
.El
.Sh SEE ALSO
.Xr lfs_bmapv 2 ,
.Xr lfs_markv 2 ,
.Xr lfs_segclean 2 ,
.Xr lfs_cleanerd 8
.Sh HISTORY
The
.Fn lfs_segwait
function call appeared in
.Bx 4.4 .