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 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. 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.