cifs – Microsoft(tm) Windows network filesystem client

cifs [ –bdDiv ] [ –a auth–method ] [ –s srvname ] [ –n called–name ] [ –k keyparam ] [ –m mntpnt ] host [ share ... ]

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 arguments are:
a auth–methodCifs authenticates using BNTLM by default, but alternative strategies may be selected using this option. Cifs eschews cleartext authentication, however it may be enabled with the plain 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 requires an open and close per file and thus will slow cifs considerably; 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–nameThe 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 *SMBSERVER. –s srvname     post the service as /srv/srvname.
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 capabilities offered by the server which is mainly of use for debugging 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.


factotum(4), aquarela(8)

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.

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