mailto(samba-bugs@samba.org) manpage(winbindd htmlcommand((1)))(1)(8 May 2000)(Samba)(SAMBA) label(NAME) manpagename(winbindd)(Name Service Switch daemon for resolving names from NT servers) label(SYNOPSIS) manpagesynopsis() bf(winbindd) [link(-d debuglevel)(minusd)] [link(-i)(minusi)] label(DESCRIPTION) manpagedescription() This program is part of the bf(Samba) suite version 3.0 and describes functionality not yet implemented in the main version of Samba. bf(winbindd) is a daemon that provides a service for the Name Service Switch capability that is present in most modern C libraries. The Name Service Switch allows user and system information to be obtained from different databases services such as NIS or DNS. The exact behaviour can be configured throught the tt(/etc/nsswitch.conf) file. Users and groups are allocated as they are resolved to a range of user and group ids specified by the administrator of the Samba system. The service provided by bf(winbindd) is called `ntdom' and can be used to resolve user and group information from a Windows NT server. The following nsswitch databases are implemented by the bf(winbindd) service: startdit() dit(passwd) User information traditionally stored in the bf(passwd(5)) file and used by bf(getpwent(3)) functions. dit(group) Group information traditionally stored in the bf(group(5)) file and used by bf(getgrent(3)) functions. enddit() For example, the following simple configuration in the tt(/etc/nsswitch.conf) file can be used to initially resolve user and group information from tt(/etc/passwd) and tt(/etc/group) and then from the Windows NT server. passwd: files ntdom group: files ntdom label(OPTIONS) manpageoptions() The following options are available to the bf(winbindd) daemon: startdit() label(minusd) dit(bf(-d debuglevel)) Sets the debuglevel to an integer between 0 and 100. 0 is for no debugging and 100 is for reams and reams. To submit a bug report to the Samba Team, use debug level 100 (see bf(BUGS.txt)). label(minusi) dit(bf(-i)) Tells winbindd to not become a daemon and detach from the current terminal. This option is used by developers when interactive debugging of winbindd is required. enddit() label(NAMEANDIDRESOLUTION) manpagesection(NAME AND ID RESOLUTION) Users and groups on a Windows NT server are assigned a relative id (rid) which is unique for the domain when the user or group is created. To convert the Windows NT user or group into a unix user or group, a mapping between rids and unix user and group ids is required. This is one of the jobs that bf(winbindd) performs. As bf(winbindd) users and groups are resolved from a server, user and group ids are allocated from a specified range. This is done on a first come, first served basis, although all existing users and groups will be mapped as soon as a client performs a user or group enumeration command. The allocated unix ids are stored in a database file under the Samba lock directory and will be remembered. WARNING: The rid to unix id database is the only location where the user and group mappings are stored by bf(winbindd). If this file is deleted or corrupted, there is no way for bf(winbindd) to determine which user and group ids correspond to Windows NT user and group rids. label(CONFIGURATION) manpagesection(CONFIGURATION) Configuration of the bf(winbindd) daemon is done through configuration parameters in the url(bf(smb.conf))(smb.conf.5.html) file. All parameters should be specified in the [global] section of url(bf(smb.conf))(smb.conf.5.html). startdit() dit(winbind uid) The winbind uid parameter specifies the range of user ids that are allocated by the url(bf(winbindd))(winbindd.8.html) daemon. This range of ids should have no existing local or nis users within it as strange conflicts can occur otherwise. bf(Default:) tt( winbind uid = ) bf(Example:) tt( winbind uid = 10000-20000) dit(winbind gid) The winbind gid parameter specifies the range of group ids that are allocated by the url(bf(winbindd))(winbindd.8.html) daemon. This range of group ids should have no existing local or nis groups within it as strange conflicts can occur otherwise. bf(Default:) tt( winbind gid = ) bf(Example:) tt( winbind gid = 10000-20000) dit(winbind cache time) This parameter specifies the number of seconds the url(bf(winbindd))(winbindd.8.html) daemon will cache user and group information before querying a Windows NT server again. bf(Default:) tt( winbind cache type = 15) dit(template homedir) When filling out the user information for a Windows NT user, the url(bf(winbindd))(winbindd.8.html) daemon uses this parameter to fill in the home directory for that user. If the string tt(%D) is present it is substituted with the user's Windows NT domain name. If the string tt(%U) is present it is substituted with the user's Windows NT user name. bf(Default:) tt( template homedir = /home/%D/%U) dit(template shell) When filling out the user information for a Windows NT user, the url(bf(winbindd))(winbindd.8.html) daemon uses this parameter to fill in the home directory for that user. If the string tt(%D) is present it is substituted with the user's Windows NT domain name. If the string tt(%U) is present it is substituted with the user's Windows NT user name. bf(Default:) tt( template homedir = /home/%D/%U) enddit() label(FILES) manpagefiles() The following files are relevant to the operation of the bf(winbindd) daemon. startdit() dit(/etc/nsswitch.conf(5)) Name service switch configuration file. dit(/tmp/.winbindd/pipe) The UNIX pipe over which clients communicate with the bf(winbindd) program. For security reasons, the ntdom client will only attempt to connect to the bf(winbindd) daemon if both the tt(/tmp/.winbindd) directory and tt(/tmp/.winbindd/pipe) file are owned by root. dit(/lib/libnss_ntdom.so.X) Implementation of name service switch library. dit($LOCKDIR/winbindd_idmap.tdb) Storage for the Windows NT rid to UNIX user/group id mapping. If this file is damaged or destroyed then the mappings will be lost. The lock directory is specified when Samba is initially compiled using the tt(--with-lockdir) option. This directory is by default tt(/usr/local/samba/var/locks). dit($LOCKDIR/winbindd_cache.tdb) Storage for cached user and group information. enddit() label(SEEALSO) manpageseealso() url(bf(samba(7)))(samba.7.html), url(bf(smb.conf(5)))(smb.conf.5.html), bf(nsswitch.conf(5)) label(AUTHOR) manpageauthor() The original Samba software and related utilities were created by Andrew Tridgell email(samba-bugs@samba.org). Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed. Winbindd was written by Tim Potter.