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-.\" Copyright (c) 1996
-.\" Mike Pritchard <mpp@FreeBSD.org>. All rights reserved.
-.\"
-.\" Copyright (c) 1992, 1993, 1994
-.\" The Regents of the University of California. All rights reserved.
-.\" All rights reserved.
-.\"
-.\" This code is derived from software donated to Berkeley by
-.\" Jan-Simon Pendry.
-.\"
-.\" 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 University of
-.\" California, Berkeley and its contributors.
-.\" 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
-.\"
-.\" $FreeBSD$
-.\"
-.Dd December 14, 1996
-.Dt FDESC 5
-.Os BSD 4.4
-.Sh NAME
-.Nm fdesc
-.Nd file-descriptor file system
-.Sh SYNOPSIS
-fdesc /dev/fd fdesc rw 0 0
-.Sh DESCRIPTION
-The file-descriptor file system, or
-.Nm ,
-provides access to the per-process file descriptor
-namespace in the global filesystem namespace.
-The conventional mount point is
-.Pa /dev/fd .
-.Pp
-The file system's contents
-appear as a list of numbered files
-which correspond to the open files of the process reading the
-directory.
-The files
-.Pa /dev/fd/0
-through
-.Pa /dev/fd/#
-refer to file descriptors which can be accessed through the file
-system.
-If the file descriptor is open and the mode the file is being opened
-with is a subset of the mode of the existing descriptor, the call:
-.Bd -literal -offset indent
-fd = open("/dev/fd/0", mode);
-.Ed
-.Pp
-and the call:
-.Bd -literal -offset indent
-fd = fcntl(0, F_DUPFD, 0);
-.Ed
-.Pp
-are equivalent.
-.Pp
-Flags to the
-.Xr open 2
-call other than
-.Dv O_RDONLY ,
-.Dv O_WRONLY
-and
-.Dv O_RDWR
-are ignored.
-.Sh FILES
-.Bl -tag -width /dev/stderr -compact
-.It Pa /dev/fd/#
-.El
-.Sh SEE ALSO
-.Xr mount_devfs 8 ,
-.Xr mount_fdesc 8
-.Sh HISTORY
-The
-.Nm
-filesystem first appeared in
-.Bx 4.4 .
-The
-.Nm
-manual page first appeared in
-.Fx 2.2 .
-.Sh AUTHORS
-.An -nosplit
-The
-.Nm
-manual page was written by
-.An Mike Pritchard Aq mpp@FreeBSD.org ,
-and was based on the
-.Xr mount_fdesc 8
-manual page written by
-.An Jan-Simon Pendry .
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