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 addrSet up NFS service for the 9P server at network address addr. –f file   Set up NFS service for the 9P server at file (typically 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 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 commands 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.

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.