NFSSERVER(8) NFSSERVER(8)
NAME
nfsserver, portmapper, pcnfsd - NFS service
SYNOPSIS
aux/nfsserver [ rpc-options... ] [ nfs-options... ]
aux/pcnfsd [ rpc-options... ]
aux/portmapper [ rpc-options... ]
DESCRIPTION
These programs collectively provide NFS access to Plan 9
file servers. Nfsserver, pcnfsd, and portmapper run on a
Plan 9 CPU server, and should be started in that order. All
users on client machines have the access privileges of the
Plan 9 user `none'. Currently only NFS version 2 is served.
The rpc-options are all intended for debugging:
-r Reject: answer all RPC requests by returning the
AUTH_TOOWEAK error.
-v Verbose: show all RPC calls and internal program
state, including 9P messages. (In any case, the
program creates a file /srv/name.chat where name is
that of the program; echoing `1' or `0' into this
file sets or clears the -v flag dynamically.)
-D Debug: show all RPC messages (at a lower level than
-v). This flag may be repeated to get more detail.
-C Turn off caching: do not answer RPC requests using
the RPC reply cache.
The nfs-options are:
-a addr Set up NFS service for the 9P server at network
address addr.
-f file Set up NFS service for the 9P server at file (typi-
cally an entry in /srv).
-n Do not allow per-user authentication (default and
mandatory).
-c file File contains the uid/gid map configuration. It is
read at startup and subsequently every hour (or if
`c' is echoed into /srv/nfsserver.chat). Blank
lines or lines beginning with `#' are ignored;
lines beginning with `!' are executed as commands;
otherwise lines contain four fields separated by
white space: a regular expression (in the notation
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NFSSERVER(8) NFSSERVER(8)
of regexp(6)) for a class of servers, a regular
expression for a class of clients, a file of user
id's (in the format of a Unix password file), and a
file of group id's (same format).
-s Expect a network connection on file descriptor 1
instead of listening for incoming calls.
-t Listen for incoming TCP calls, rather than UDP
calls.
NFS clients must be in the Plan 9 /lib/ndb database. The
machine name is deduced from the IP address via ndb/query.
The machine name specified in the NFS Unix credentials is
completely ignored.
Pcnfsd is a toy program that authorizes PC-NFS clients. All
clients are mapped to uid=1, gid=1 (daemon on most systems)
regardless of name or password.
EXAMPLES
A simple /lib/ndb/nfs might contain:
!9fs tcp!ivy
.+ [^.]+\.cvrd\.hall\.edu /n/ivy/etc/passwd /n/ivy/etc/group
A typical entry in /rc/bin/cpurc might be:
aux/nfsserver -a tcp!pie -a tcp!yoshimi -c /lib/ndb/nfs
aux/pcnfsd
aux/portmapper
Assuming the CPU server's name is eduardo, the mount com-
mands on the client would be:
/etc/mount -o soft,intr eduardo:pie /n/pie
/etc/mount -o soft,intr eduardo:yoshimi /n/yoshimi
Note that a single instance of nfsserver may provide access
to several 9P servers.
FILES
/lib/ndb/nfs List of uid/gid maps.
/sys/log/nfs Log file.
SOURCE
/sys/src/cmd/9nfs
BUGS
It would be nice to provide authentication for users, but
Unix systems provide too low a level of security to be
trusted in a Plan 9 world.
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NFSSERVER(8) NFSSERVER(8)
SEE ALSO
nfs(4)
RFC1057, RPC: Remote Procedure Call Protocol Specification,
Version 2, describes Sun's RPC protocol.
RFC1094, NFS: Network File System Protocol Specification,
describes NFS version 2.
RFC1813, NFS Version 3 Protocol Specification.
RFC3530, Network File System (NFS) version 4 Protocol.
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