exportfs, srvfs - network file server plumbing exportfs [ -an ] [ -c ctlfile ]

srvfs name dir

Exportfs is a user level file server that allows Plan 9 compute servers, rather than file servers, to export portions of a name space across networks. The service is started either by the cpu (1) command or by a network listener process. An initial protocol establishes a root directory for the exported name space. The connection to exportfs is then mounted, typically on /mnt/term . Exportfs then acts as a relay file server: operations in the imported file tree are executed on the remote server and the results returned. This gives the appearance of exporting a name space from a remote machine into a local file tree.

The -a option instructs exportfs to authenticate the user, usually because it is being invoked from a remote machine.

The -n option disallows export to user none .

The -c options specifies a network control file onto which exportfs will push the fcall line discipline. This option is intended for networks that do not preserve read/write boundaries.

The cpu command uses exportfs to serve device files in the terminal. The import (4) command calls exportfs on a remote machine, permitting users to access arbitrary pieces of name space on other systems.

Srvfs uses exportfs to create a mountable file system from a name space: a subsequent mount (see bind (1)) of /srv/ name will reproduce the name space rooted at dir . One might use srvfs to enable mounting of an FTP file system (see ftpfs (4)) in several windows.

/sys/src/cmd/exportfs

/sys/src/cmd/srvfs.c