term% cat index.txt CIFS(4) Kernel Interfaces Manual CIFS(4)
NAME
cifs - Microsoft⢠Windows network filesystem client
SYNOPSIS
cifs [ -bdDiv ] [ -a auth-method ] [ -s srvname ] [ -n called-name ] [
-k keyparam ] [ -m mntpnt ] host [ share ... ]
DESCRIPTION
Cifs translates between Microsoft's file-sharing protocol (a.k.a. CIFS
or SMB) and 9P, allowing Plan9 clients to mount file systems (shares or
trees in MS terminology) published by such servers.
The root of the mounted directory contains one subdirectory per share,
always named in lower case, and a few virtual files of mixed case which
give additional server, session, share, and user information. The ar‐
guments are:
-a auth-method
Cifs authenticates using by default, but alternative strategies
may be selected using this option. Cifs eschews cleartext au‐
thentication, however it may be enabled with the auth method.
The list of currently-supported methods is printed if no method
name is supplied.
Windows server 2003 requires the BNTLMv2 method by default,
though it can be configured to be more flexible.
-b Enable file ownership resolution in stat(2) calls. This re‐
quires an open and close per file and thus will slow cifs con‐
siderably; its use is not recommended.
-d CIFS packet debug.
-D 9P request debug.
-k keyparam
lists extra parameters which will be passed to factotum(4) to
select a specific key. The remote servers's domain is always
included in the keyspec, under the assumption that all servers
in a Windows domain share an authentication domain; thus cifs
expects keys in factotum of the form:
key proto=pass dom=THEIR-DOMAIN service=cifs
user=MY-USERNAME !password=XYZZY
-m mntpnt
set the mount point for the remote filesystem; the default is
/n/host.
-n called-name
The CIFS protocol requires clients to know the NetBios name of
the server they are attaching to, the Icalled-name. If this is
not specified on the command line, cifs attempts to discover
this name from the remote server. If this fails it will then
try host, and finally it will try the name
-s srvname
post the service as /srv/srvname.
host The address of the remote server to connect to.
share A list of share names to attach on the remote server; if none is
given, cifs will attempt to attach all shares published by the
remote host.
Synthetic Files
Several synthetic files appear in the root of the mounted filesystem:
Shares Contains a list of the currently attached shares, with fields
giving the share name, disk free space / capacity, the share
type, and a descriptive comment from the server.
Connection
Contains the username used for authentication, server's called
name, server's domain, server's OS, the time slip between the
local host and the server, the Maximum Transfer Unit (MTU) the
server requested, and optionally a flag indicating only guest
access has been granted. The second line contains a list of ca‐
pabilities offered by the server which is mainly of use for de‐
bugging cifs.
Users Each line contains a user's name, the user's full name, and a
descriptive comment.
Groups Each line gives a group's name, and a list of the names of the
users who are members of that group.
Sessions
Lists the users authenticated, the client machine's NetBios name
or IP address, the time since the connection was established,
and the time for which the connection has been idle.
Domains
One line per domain giving the domain name and a descriptive
comment.
Workstations
One line per domain giving the domain name and a descriptive
comment, the version number of the OS it is running, and comma-
separated list of flags giving the features of that OS.
Dfsroot
Top level DFS routing giving the DFS link type, time to live of
the data, proximity of the server, the Netbios or DNS name and a
physical path or a machine that this maps to.
DNS paths are usually assigned dynamicially as a form of load
balancing.
SOURCE
/sys/src/cmd/cifs
SEE ALSO
factotum(4), aquarela(8)
BUGS
NetApp Filer compatibility has not yet been tested; there may not be
any.
DFS support is unfinished.
Kerberos authentication is unfinished.
NetBios name resolution is not supported, though it is now rarely used.
Cifs has only been tested against aquarela(8), Windows 95, NT4.0sp6,
Windows server 2003, WinXP pro, Samba 3.0, and Samba 2.0 (Pluto
VideoSpace). No support is attempted for servers predating NT 4.0.
CIFS(4)