386BSD 0.1 development

Work on file usr/src/sbin/mountd/exports.5

Co-Authored-By: Lynne Greer Jolitz <ljolitz@cardio.ucsf.edu>
Synthesized-from: 386BSD-0.1

diff --git a/usr/src/sbin/mountd/exports.5 b/usr/src/sbin/mountd/exports.5
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+.\" Copyright (c) 1989, 1991 The Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\" 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.
+.\"
+.\"     @(#)exports.5  5.2 (Berkeley) 5/10/91
+.\"
+.Dd May 10, 1991
+.Dt EXPORTS 5
+.Os
+.Sh NAME
+.Nm exports
+.Nd define remote mount points for
+.Tn NFS
+mount requests
+.Sh SYNOPSIS
+.Nm exports
+.Sh DESCRIPTION
+The
+.Nm exports
+file
+specifies remote mount points for the
+.Tn NFS
+mount protocol per the
+.Tn NFS
+server specification; see
+.%T "Network File System Protocol Specification \\*(tNRFC\\*(sP 1094" .
+.Pp
+Each line in the file specifies one remote mount point.
+The first field is the mount point directory path followed
+optionally by export options and specific hosts separated by white space.
+Only the first entry for a given local file system may specify the export
+options, since these are handled on a
+.Em per local file system
+basis.
+If no specific hosts are specified,
+the mount point is exported to all hosts.
+.Pp
+The export options are as follows:
+.Sm off
+.Fl root No = Aq Sy uid
+.Sm on
+specifies how to map root's uid (default -2).
+The option
+.Fl r
+is synonyms for
+.Fl root
+in an effort to be backward compatible with older export file formats.
+.Pp
+.Fl ro
+specifies that the file system should be exported Read-only
+(default Read/Write).
+The option
+.Fl o
+is synonyms for
+.Fl ro
+in an effort to be backward compatible with older export file formats.
+.Pp
+For example:
+.Bd -literal -offset indent
+/usr -root=0 rickers snowhite.cis.uoguelph.ca
+/usr/local 131.104.48.16
+/u -root=5
+/u2 -ro
+.Ed
+.Pp
+Given that
+.Sy /usr ,
+.Sy /u
+and
+.Sy /u2
+are
+local file system mount points, the above example specifies the following:
+.Bd -filled -offset indent
+.Sy /usr
+is exported to hosts
+.Em rickers
+and
+.Em snowhite.cis.uoguelph.ca
+with
+root mapped to root.
+.Pp
+.Sy /usr/local
+is exported to host
+.Em 131.104.48.16
+with root mapped to root.
+.Pp
+.Sy /u
+is exported to all hosts with root mapped to uid 5.
+.Pp
+.Sy /u2
+is exported to all hosts Read-only with root mapped to -2.
+.Ed
+.Pp
+Note that
+.Dq Li "/usr/local -root=5"
+would have been incorrect,
+since
+.Sy /usr
+and
+.Sy /usr/local
+reside in the same local file system.
+.Sh FILES
+.Bl -tag -width /etc/exports -compact
+.It Pa /etc/exports
+The remote mount point file
+.Nm exports
+resides in
+.Pa /etc .
+.El
+.Sh SEE ALSO
+.Xr mountd 8 ,
+.Xr nfsd 8 ,
+.Xr showmount 8
+.Sh BUGS
+It would be nice if the export options were not tied to local mount points.
+.Sh HISTORY
+The
+.Nm
+file format is
+.Ud .