.\"	$NetBSD: lfs_segwait.2,v 1.4 2002/02/08 01:28:18 ross Exp $
.\"
.\" Copyright (c) 2000 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Konrad Schroder.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"        This product includes software developed by the NetBSD
.\"        Foundation, Inc. and its contributors.
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
.\"    contributors may be used to endorse or promote products derived
.\"    from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.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
.Fd #include \*[Lt]sys/types.h\*[Gt]
.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 filesystem
specified by
.Fa *fsidp
or if
.Fa *fsidp
is -1, until a segment is acquired for writing by any LFS filesystem.
.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 .