ref: 1647696236f2d10e70cd8a0fc2a04fabfa5f63a6
dir: /sys/man/8/nfsserver/
.TH NFSSERVER 8 .SH NAME nfsserver, portmapper, pcnfsd \- NFS service .SH SYNOPSIS .B aux/nfsserver [ .I rpc-options... ] [ .I nfs-options... ] .br .B aux/pcnfsd [ .I rpc-options... ] .br .B aux/portmapper [ .I rpc-options... ] .SH DESCRIPTION These programs collectively provide NFS access to Plan 9 file servers. .IR Nfsserver , .IR pcnfsd , and .I 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 .LR none . Currently only NFS version 2 is served. .PP The .I rpc-options are all intended for debugging: .nr zz \w'\f5-a\f2 addr'+2n/1n .TP \n(zz .B -r Reject: answer all RPC requests by returning the .B AUTH_TOOWEAK error. .TP .B -v Verbose: show all RPC calls and internal program state, including 9P messages. (In any case, the program creates a file .BI /srv/ name .chat where .I name is that of the program; echoing .L 1 or .L 0 into this file sets or clears the .B -v flag dynamically.) .TP .B -D Debug: show all RPC messages (at a lower level than .BR -v ). This flag may be repeated to get more detail. .TP .B -C Turn off caching: do not answer RPC requests using the RPC reply cache. .PP The .I nfs-options are: .TP \n(zz .BI -a " addr" Set up NFS service for the 9P server at network address .IR addr . .TP .BI -f " file" Set up NFS service for the 9P server at .I file (typically an entry in .BR /srv ). .TP .B -n Do not allow per-user authentication (default and mandatory). .TP .BI -c " file" .I File contains the uid/gid map configuration. It is read at startup and subsequently every hour (or if .L c is echoed into .BR /srv/nfsserver.chat ). Blank lines or lines beginning with .L # are ignored; lines beginning with .L ! are executed as commands; otherwise lines contain four fields separated by white space: a regular expression (in the notation of .IR 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). .TP .B -s Expect a network connection on file descriptor 1 instead of listening for incoming calls. .TP .B -t Listen for incoming TCP calls, rather than UDP calls. .PP NFS clients must be in the Plan 9 .B /lib/ndb database. The machine name is deduced from the IP address via .BR ndb/query . The machine name specified in the NFS Unix credentials is completely ignored. .PP .I Pcnfsd is a toy program that authorizes PC-NFS clients. All clients are mapped to uid=1, gid=1 .RB ( daemon on most systems) regardless of name or password. .SH EXAMPLES A simple .B /lib/ndb/nfs might contain: .PP .EX !9fs tcp!ivy \&.+ [^.]+\e.cvrd\e.hall\e.edu /n/ivy/etc/passwd /n/ivy/etc/group .EE .PP A typical entry in .B /rc/bin/cpurc might be: .PP .EX aux/nfsserver -a tcp!pie -a tcp!yoshimi -c /lib/ndb/nfs aux/pcnfsd aux/portmapper .EE .PP Assuming the CPU server's name is .BR eduardo , the mount commands on the client would be: .PP .EX /etc/mount -o soft,intr eduardo:pie /n/pie /etc/mount -o soft,intr eduardo:yoshimi /n/yoshimi .EE .PP Note that a single instance of .I nfsserver may provide access to several 9P servers. .SH FILES .TF /lib/ndb/nfs .TP .B /lib/ndb/nfs List of uid/gid maps. .TP .B /sys/log/nfs Log file. .SH SOURCE .B /sys/src/cmd/9nfs .SH 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. .SH SEE ALSO .IR nfs (4) .br RFC1057, .I "RPC: Remote Procedure Call Protocol Specification, Version 2," describes Sun's RPC protocol. .br RFC1094, .I "NFS: Network File System Protocol Specification," describes NFS version 2. .br RFC1813, .I "NFS Version 3 Protocol Specification." .br RFC3530, .I "Network File System (NFS) version 4 Protocol."