IMPORT(4)IMPORT(4)NAME
import, 9export - exchange name spaces with a Plan 9 system
SYNOPSISimport [ -ab ] [ -c ] [ -k keyspec ] [ -e crypt hash ] host file [
localfile ]
9export [ -A ] [ -k keyspec ] [ -e crypt hash ]
DESCRIPTION
Import dials the Plan 9 host (which might be the current host) and
makes the given file on that system visible in the local name space as
localfile (if localfile is not given, file is used as the local name).
The authentication agent factotum(4) must be active. (When Inferno is
running on Plan 9, Plan 9's own authentication agent can be used, by
binding Plan 9's /mnt/factotum to the same name in Inferno's own name
space. See fs(3).) The remote files are accessed with the permissions
of the user authenticated to the remote system by factotum.
If the remote file is a directory, the whole file tree rooted at that
directory is accessible, the local mount point must also be a direc‐
tory, and the -a, -b, and -c options control the creation of union
directories just as for bind(1). By default, the remote file replaces
the local one in the name space.
If the -e option is given, the network connection can be encrypted, or
provided with digests to authenticate the contents, or both. Crypt is
an encryption algorithm accepted by ssl(3); hash is one of its digest
algorithms. Plan 9's exportfs normally requires 'rc4_256 sha1' on such
connections; it currently provides no negotiation of algorithms.
The -k option gives a string of space separated attr=value pairs that
control factotum's selection of a suitable key for the remote system.
9export serves the Plan 9 exportfs protocol on its standard input,
allowing a Plan 9 system to import parts of the Inferno name space in
which 9export is run. If the -A option is given, the caller is not
authenticated, line encryption and message authentication are not done,
and the Plan 9 exportfs protocol starts immediately. Otherwise, facto‐
tum(4) must be accessible via /mnt/factotum as for import, and it is
used to run the Plan 9 authentication protocol. The -e and -k options
are as for import. Normally 9export returns when the client closes the
connection; the -a option causes 9export to return immediately, leaving
a kernel process to serve the name space. 9export might be used as
follows:
listen -Av 'tcp!*!exportfs' {9export&}
Beware that currently the name space is served with the permissions of
the person running 9export, not those of the caller.
SOURCE
/appl/cmd/9export.b
/appl/cmd/import.b
SEE ALSObind(1), factotum(2), export(4), namespace(6)IMPORT(4)
