CIFS(4) CIFS(4) NAME cifs - Microsofttm Windows filesystem client SYNOPSIS aux/cifs [ -dDvb ] [ -a auth-method ] [ -s srvname ] [ -n called-name ] [ -k keyparam ] [ -m mntpnt ] host [ share... ] DESCRIPTION Cifs translates between the Microsoft's file sharing proto- col, (AKA CIFS or SMB), and 9P, allowing Plan9 clients to mount file systems (shares or trees in MS terminology) pub- lished 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 options are: -D 9P request debug. -d CIFS packet debug. -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 reccomended. -a auth-method Cifs authenticates using NTLM by default, alternative stratigies may be selected using this option. Cifs enshews cleartext authentication, however it may be enabled with the plain auth method. The list of cur- rently supported methods is printed if no method name is supplied. Windows server 2003 requires the NTLMv2 method by default though it can be configured to be more flexi- ble. -s srvname post the service as /srv/ srvname -n called-name The CIFS protocol requires clients to know the NetBios name of the server they are attaching to, the called- 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, finally it will try the name *SMBSERVER. CIFS(4) CIFS(4) -k keyparam lists extra parameters which will be passed to facto- tum(4) to remove key ambiguity. 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. host The address of the remote server to connect to. share A list of share names to attach on the remote server, if none given cifs will attempt to attach all shares published by the remote host. VIRTUAL FILES Several virtual 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 / capac- ity, 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 option- ally a flag indicating only guest access has been granted. The seccond line contains a list of capabili- ties offered by the server which is mainly of use for debugging cifs(1) Users Each line contains a user's name, the users 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 CIFS(4) CIFS(4) 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 seperated 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. BUGS The NetApp Filer compatibility has not yet been tested, there may not be any. DFS supported is not yet completed. Kerbros authentication is not yet supported. NetBios name resolution is not supported, though it is now rarely used. Cifs has only been tested against aquarela(1) 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 NT4.0. HISTORY Cifs was written by Steve Simon, It is a re-implementation of an earlier client written by Russ Cox and William Joseph- son.