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.\" ========================================================================
.\"
.IX Title "FS_EXPORTAFS 1"
.TH FS_EXPORTAFS 1 "2018-09-21" "OpenAFS" "AFS Command Reference"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
fs_exportafs \- Configures export of AFS to clients of other file systems
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBfs exportafs\fR \fB\-type\fR\ <\fIexporter\ name\fR>
    [\fB\-start\fR\ <\fIstart/stop\ translator\ (on\ |\ off)\fR>]
    [\fB\-convert\fR\ <\fIconvert\ from\ afs\ to\ unix\ mode\ (on\ |\ off)\fR>]
    [\fB\-uidcheck\fR\ <\fIrun\ on\ strict\ 'uid\ check'\ mode\ (on\ |\ off)\fR>]
    [\fB\-submounts\fR\ <\fIallow\ nfs\ mounts\ to\ subdirs\ of\ /afs/..\ (on\ |\ off)\fR>]
    [\fB\-help\fR]
.PP
\&\fBfs exp\fR \fB\-t\fR\ <\fIexporter\ name\fR>
    [\fB\-st\fR\ <\fIstart/stop\ translator\ (on\ |\ off)\fR>]
    [\fB\-c\fR\ <\fIconvert\ from\ afs\ to\ unix\ mode\ (on\ |\ off)\fR>]
    [\fB\-u\fR\ <\fIrun\ on\ strict\ 'uid\ check'\ mode\ (on\ |\ off)\fR>]
    [\fB\-su\fR\ <\fIallow\ nfs\ mounts\ to\ subdirs\ of\ /afs/..\ (on\ |\ off)\fR>]
    [\fB\-h\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBfs exportafs\fR command sets (if the \fB\-start\fR argument is provided)
or reports (if it is omitted) whether the machine can reexport the \s-1AFS\s0
filespace to clients of a non-AFS file system. To control certain features
of the translation protocol, use the following arguments:
.IP "\(bu" 4
To control whether the \s-1UNIX\s0 group and other mode bits on an \s-1AFS\s0 file or
directory are set to match the owner mode bits when it is exported to the
non-AFS file system, use the \fB\-convert\fR argument.
.IP "\(bu" 4
To control whether tokens can be placed in a credential structure
identified by a \s-1UID\s0 that differs from the local \s-1UID\s0 of the entity that is
placing the tokens in the structure, use the \fB\-uidcheck\fR argument. The
most common use is to control whether issuers of the \fBknfs\fR command can
specify a value for its \fB\-id\fR argument that does not match their local
\&\s-1UID\s0 on the \s-1NFS/AFS\s0 translator machine.
.IP "\(bu" 4
To control whether users can create mounts in the non-AFS filespace to an
\&\s-1AFS\s0 directory other than \fI/afs\fR, use the \fB\-submounts\fR argument.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-type\fR <\fIexporter name\fR>" 4
.IX Item "-type <exporter name>"
Names the alternate file system to which to reexport the \s-1AFS\s0
filespace. The only acceptable value is \f(CW\*(C`nfs\*(C'\fR, in lowercase letters only.
.IP "\fB\-start\fR on =item \fB\-start\fR off" 4
.IX Item "-start on =item -start off"
Enables the local machine to reexport the \s-1AFS\s0 filespace if the value is
\&\f(CW\*(C`on\*(C'\fR, or disables it if the value is \f(CW\*(C`off\*(C'\fR. Omit this argument to report
the current setting for all of the configurable parameters.
.IP "\fB\-convert\fR on =item \fB\-convert\fR off" 4
.IX Item "-convert on =item -convert off"
Controls the setting of the \s-1UNIX\s0 group and other mode bits on \s-1AFS\s0 files
and directories exported to the non-AFS file system. If the value is
\&\f(CW\*(C`on\*(C'\fR, they are set to match the \fBowner\fR mode bits. If the value is
\&\f(CW\*(C`off\*(C'\fR, the bits are not changed. If this argument is omitted, the default
value is \f(CW\*(C`on\*(C'\fR.
.IP "\fB\-uidcheck\fR on =item \fB\-uidcheck\fR off" 4
.IX Item "-uidcheck on =item -uidcheck off"
Controls whether tokens can be placed in a credential structure identified
by a \s-1UID\s0 that differs from the local \s-1UID\s0 of the entity that is placing the
tokens in the structure.
.RS 4
.IP "\(bu" 4
If the value is on, the \s-1UID\s0 that identifies the credential structure must
match the local \s-1UID.\s0
.Sp
With respect to the \fBknfs\fR command, this value means that the value of
\&\fB\-id\fR argument must match the issuer's local \s-1UID\s0 on the translator
machine. In practice, this setting makes it pointless to include the
\&\fB\-id\fR argument to the \fBknfs\fR command, because the only acceptable value
(the issuer's local \s-1UID\s0) is already used when the \fB\-id\fR argument is
omitted.
.Sp
Enabling \s-1UID\s0 checking also makes it impossible to issue the \fBklog\fR and
\&\fBpagsh\fR commands on a client machine of the non-AFS file system even
though it is a system type supported by \s-1AFS.\s0 For an explanation, see
\&\fIklog\fR\|(1).
.IP "\(bu" 4
If the value is off (the default), tokens can be assigned to a local \s-1UID\s0
in the non-AFS file system that does not match the local \s-1UID\s0 of the entity
assigning the tokens.
.Sp
With respect to the \fBknfs\fR command, it means that the issuer can use the
\&\fB\-id\fR argument to assign tokens to a local \s-1UID\s0 on the \s-1NFS\s0 client machine
that does not match his or her local \s-1UID\s0 on the translator machine. (An
example is assigning tokens to the \s-1MFS\s0 client machine's local superuser
\&\f(CW\*(C`root\*(C'\fR.) This setting allows more than one issuer of the \fBknfs\fR command
to make tokens available to the same user on the \s-1NFS\s0 client machine. Each
time a different user issues the \fBknfs\fR command with the same value for
the \fB\-id\fR argument, that user's tokens overwrite the existing ones. This
can result in unpredictable access for the user on the \s-1NFS\s0 client machine.
.RE
.RS 4
.RE
.IP "\fB\-submounts\fR on =item \fB\-submounts\fR off" 4
.IX Item "-submounts on =item -submounts off"
Controls whether a user of the non-AFS filesystem can mount any directory
in the \s-1AFS\s0 filespace other than the top-level \fI/afs\fR directory. If the
value is \f(CW\*(C`on\*(C'\fR, such submounts are allowed. If the value is \f(CW\*(C`off\*(C'\fR, only
mounts of the \fI/afs\fR directory are allowed. If this argument is omitted,
the default value is \f(CW\*(C`off\*(C'\fR.
.IP "\fB\-help\fR" 4
.IX Item "-help"
Prints the online help for this command. All other valid options are
ignored.
.SH "OUTPUT"
.IX Header "OUTPUT"
If the machine is not even configured as a server of the non-AFS file
system, the following message appears:
.PP
.Vb 2
\&   Sorry, the <file_system>\-exporter type is currently not supported on
\&   this AFS client
.Ve
.PP
If the machine is configured as a server of the non-AFS file system but is
not currently enabled to reexport \s-1AFS\s0 to it (because the \fB\-start\fR
argument to this command is not set to \f(CW\*(C`on\*(C'\fR), the message is as follows:
.PP
.Vb 1
\&   \*(Aq<file_system>\*(Aq translator is disabled
.Ve
.PP
If the machine is enabled to reexport \s-1AFS,\s0 the following message precedes
messages that report the settings of the other parameters.
.PP
.Vb 1
\&   \*(Aq<file_system>\*(Aq translator is enabled with the following options:
.Ve
.PP
The following messages indicate that the \fB\-convert\fR argument is set to
\&\f(CW\*(C`on\*(C'\fR or \f(CW\*(C`off\*(C'\fR respectively:
.PP
.Vb 2
\&   Running in convert owner mode bits to world/other mode
\&   Running in strict unix mode
.Ve
.PP
The following messages indicate that the \fB\-uidcheck\fR argument is set to
\&\f(CW\*(C`on\*(C'\fR or \f(CW\*(C`off\*(C'\fR respectively:
.PP
.Vb 2
\&   Running in strict \*(Aqpasswd sync\*(Aq mode
\&   Running in no \*(Aqpasswd sync\*(Aq mode
.Ve
.PP
The following messages indicate that the \fB\-submounts\fR argument is set to
\&\f(CW\*(C`on\*(C'\fR or \f(CW\*(C`off\*(C'\fR respectively:
.PP
.Vb 2
\&   Allow mounts of /afs/.. subdirs
\&   Only mounts to /afs allowed
.Ve
.SH "EXAMPLES"
.IX Header "EXAMPLES"
The following example shows that the local machine can export \s-1AFS\s0 to \s-1NFS\s0
client machines.
.PP
.Vb 5
\&   % fs exportafs nfs
\&   \*(Aqnfs\*(Aq translator is enabled with the following options:
\&        Running in convert owner mode bits to world/other mode
\&        Running in no \*(Aqpasswd sync\*(Aq mode
\&        Only mounts to /afs allowed
.Ve
.PP
The following example enables the machine as an \s-1NFS\s0 server and converts
the \s-1UNIX\s0 group and other mode bits on exported \s-1AFS\s0 directories and files
to match the \s-1UNIX\s0 owner mode bits.
.PP
.Vb 1
\&   % fs exportafs \-type nfs \-start on \-convert on
.Ve
.PP
The following example disables the machine from reexporting \s-1AFS\s0 to \s-1NFS\s0
client machines:
.PP
.Vb 1
\&   % fs exportafs \-type nfs \-start off
.Ve
.SH "PRIVILEGE REQUIRED"
.IX Header "PRIVILEGE REQUIRED"
The issuer must be logged in as the local superuser root.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIklog\fR\|(1),
\&\fIknfs\fR\|(1)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
\&\s-1IBM\s0 Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
.PP
This documentation is covered by the \s-1IBM\s0 Public License Version 1.0.  It was
converted from \s-1HTML\s0 to \s-1POD\s0 by software written by Chas Williams and Russ
Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.