184 lines
3.7 KiB
Plaintext
184 lines
3.7 KiB
Plaintext
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.TH NFSSERVER 8
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.SH NAME
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nfsserver, portmapper, pcnfsd \- NFS service
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.SH SYNOPSIS
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.B aux/nfsserver
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[
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.I rpc-options...
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]
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[
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.I nfs-options...
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]
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.br
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.B aux/pcnfsd
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[
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.I rpc-options...
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]
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.br
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.B aux/portmapper
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[
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.I rpc-options...
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]
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.SH DESCRIPTION
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These programs collectively provide NFS access to Plan 9 file servers.
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.IR Nfsserver ,
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.IR pcnfsd ,
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and
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.I portmapper
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run on a Plan 9 CPU server, and should be started in that order.
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All users on client machines have the
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access privileges of the Plan 9 user
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.LR none .
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Currently only NFS version 2 is served.
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.PP
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The
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.I rpc-options
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are all intended for debugging:
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.nr zz \w'\f5-a\f2 addr'+2n/1n
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.TP \n(zz
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.B -r
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Reject: answer all RPC requests by returning the
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.B AUTH_TOOWEAK
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error.
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.TP
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.B -v
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Verbose: show all RPC calls and internal program state, including 9P messages.
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(In any case, the program creates a file
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.BI /srv/ name .chat
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where
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.I name
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is that of the program; echoing
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.L 1
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or
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.L 0
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into this file sets or clears the
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.B -v
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flag dynamically.)
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.TP
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.B -D
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Debug: show all RPC messages (at a lower level than
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.BR -v ).
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This flag may be repeated to get more detail.
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.TP
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.B -C
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Turn off caching: do not answer RPC requests using the
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RPC reply cache.
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.PP
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The
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.I nfs-options
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are:
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.TP \n(zz
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.BI -a " addr"
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Set up NFS service for the 9P server at network address
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.IR addr .
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.TP
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.BI -f " file"
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Set up NFS service for the 9P server at
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.I file
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(typically an entry in
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.BR /srv ).
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.TP
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.B -n
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Do not allow per-user authentication
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(default and mandatory).
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.TP
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.BI -c " file"
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.I File
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contains the uid/gid map configuration. It is read at startup
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and subsequently every hour (or if
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.L c
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is echoed into
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.BR /srv/nfsserver.chat ).
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Blank lines or lines beginning with
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.L #
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are ignored; lines beginning with
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.L !
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are executed as commands; otherwise lines contain four fields
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separated by white space: a regular expression (in the notation of
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.IR regexp (6))
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for a class of servers, a regular expression for
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a class of clients, a file of user id's (in the format of a Unix
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password file), and a file of group id's (same format).
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.TP
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.B -s
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Expect a network connection on file descriptor 1
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instead of listening for incoming calls.
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.TP
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.B -t
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Listen for incoming TCP calls, rather than UDP calls.
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.PP
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NFS clients must be in the Plan 9
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.B /lib/ndb
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database.
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The machine name is deduced from the IP address via
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.BR ndb/query .
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The machine name specified in the NFS Unix credentials
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is completely ignored.
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.PP
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.I Pcnfsd
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is a toy program that authorizes PC-NFS clients. All clients
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are mapped to uid=1, gid=1
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.RB ( daemon
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on most systems) regardless of name or password.
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.SH EXAMPLES
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A simple
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.B /lib/ndb/nfs
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might contain:
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.PP
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.EX
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!9fs tcp!ivy
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\&.+ [^.]+\e.cvrd\e.hall\e.edu /n/ivy/etc/passwd /n/ivy/etc/group
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.EE
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.PP
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A typical entry in
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.B /rc/bin/cpurc
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might be:
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.PP
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.EX
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aux/nfsserver -a tcp!pie -a tcp!yoshimi -c /lib/ndb/nfs
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aux/pcnfsd
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aux/portmapper
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.EE
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.PP
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Assuming the CPU server's name is
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.BR eduardo ,
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the mount commands on the client would be:
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.PP
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.EX
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/etc/mount -o soft,intr eduardo:pie /n/pie
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/etc/mount -o soft,intr eduardo:yoshimi /n/yoshimi
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.EE
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.PP
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Note that a single instance of
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.I nfsserver
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may provide access to several 9P servers.
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.SH FILES
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.TF /lib/ndb/nfs
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.TP
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.B /lib/ndb/nfs
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List of uid/gid maps.
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.TP
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.B /sys/log/nfs
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Log file.
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.SH SOURCE
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.B /sys/src/cmd/9nfs
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.SH BUGS
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It would be nice to provide authentication for users, but Unix systems
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provide too low a level of security to be trusted in a Plan 9 world.
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.SH SEE ALSO
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.IR nfs (4)
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.br
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RFC1057,
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.I "RPC: Remote Procedure Call Protocol Specification, Version 2,"
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describes Sun's RPC protocol.
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.br
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RFC1094,
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.I "NFS: Network File System Protocol Specification,"
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describes NFS version 2.
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.br
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RFC1813,
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.I "NFS Version 3 Protocol Specification."
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.br
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RFC3530,
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.I "Network File System (NFS) version 4 Protocol."
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