2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
153 lines
4 KiB
Groff
153 lines
4 KiB
Groff
.\" $NetBSD: fhopen.2,v 1.17 2009/08/05 23:15:52 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 1999 National Aeronautics & Space Administration
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This software was written by William Studenmund of the
|
|
.\" Numerical Aerospace Simulation Facility, NASA Ames Research Center.
|
|
.\"
|
|
.\" 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. Neither the name of the National Aeronautics & Space Administration
|
|
.\" 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 NATIONAL AERONAUTICS & SPACE ADMINISTRATION
|
|
.\" ``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 ADMINISTRATION OR CONTRIB-
|
|
.\" UTORS 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 August 5, 2009
|
|
.Dt FHOPEN 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm fhopen ,
|
|
.Nm fhstat ,
|
|
.Nm fhstatvfs
|
|
.Nd access file via file handle
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/types.h
|
|
.In sys/mount.h
|
|
.Ft int
|
|
.Fn fhopen "const void *fhp" "size_t fh_size" "int flags"
|
|
.In sys/stat.h
|
|
.Ft int
|
|
.Fn fhstat "const void *fhp" "size_t fh_size" "struct stat *sb"
|
|
.In sys/statvfs.h
|
|
.Ft int
|
|
.Fn fhstatvfs "const void *fhp" "size_t fh_size" "struct statvfs *buf"
|
|
.Ft int
|
|
.Fn fhstatvfs1 "const void *fhp" "size_t fh_size" "struct statvfs *buf" "int flags"
|
|
.Sh DESCRIPTION
|
|
These functions provide a means to access a file given the opaque file handle
|
|
.Fa fhp
|
|
and the size
|
|
.Fa fh_size
|
|
of the opaque object as returned by
|
|
.Xr getfh 2 .
|
|
As this method bypasses directory access restrictions, these calls are
|
|
restricted to the superuser.
|
|
.Pp
|
|
.Fn fhopen
|
|
opens the file referenced by
|
|
.Fa fhp
|
|
for reading and/or writing as specified by the argument
|
|
.Fa flags
|
|
and returns the file descriptor to the calling process.
|
|
The
|
|
.Fa flags
|
|
are specified by
|
|
.Em or Ns 'ing
|
|
together the flags used for the
|
|
.Xr open 2
|
|
call.
|
|
All said flags are valid except for
|
|
.Dv O_CREAT .
|
|
.Pp
|
|
.Fn fhstat ,
|
|
.Fn fhstatvfs ,
|
|
and
|
|
.Fn fhstatvfs1
|
|
provide the functionality of the
|
|
.Xr fstat 2 ,
|
|
.Xr fstatvfs 2 ,
|
|
and
|
|
.Xr fstatvfs1 2
|
|
calls except that they return information for the file referred to by
|
|
.Fa fhp
|
|
rather than an open file.
|
|
.Sh RETURN VALUES
|
|
Upon successful completion,
|
|
.Fn fhopen
|
|
returns the file descriptor for the opened file, while
|
|
.Fn fhstat ,
|
|
.Fn fhstatvfs ,
|
|
and
|
|
.Fn fhstatvfs1
|
|
return 0.
|
|
Otherwise, \-1 is returned and
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
In addition to the errors returned by
|
|
.Xr open 2 ,
|
|
.Xr fstat 2 ,
|
|
.Xr fstatvfs 2 ,
|
|
and
|
|
.Xr fstatvfs1 2 ,
|
|
respectively,
|
|
.Fn fhopen ,
|
|
.Fn fhstat ,
|
|
.Fn fhstatvfs ,
|
|
and
|
|
.Fn fhstatvfs1
|
|
will return
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
Calling
|
|
.Fn fhopen
|
|
with
|
|
.Dv O_CREAT
|
|
set or invalid
|
|
.Fa fh_size .
|
|
.It Bq Er ESTALE
|
|
The file handle
|
|
.Fa fhp
|
|
is no longer valid.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr fstat 2 ,
|
|
.Xr fstatvfs 2 ,
|
|
.Xr fstatvfs1 2 ,
|
|
.Xr getfh 2 ,
|
|
.Xr open 2
|
|
.Sh HISTORY
|
|
The
|
|
.Fn fhopen ,
|
|
and
|
|
.Fn fhstat
|
|
functions first appeared in
|
|
.Nx 1.5 .
|
|
The
|
|
.Fn fhstatvfs
|
|
function replaced
|
|
.Fn fhstatfs
|
|
in
|
|
.Nx 3.0 .
|