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man pages section 8: System Administration Commands

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Updated: Thursday, June 13, 2019

vfs_acl_tdb (8)


vfs_acl_tdb - ACLs in a tdb file


vfs objects = acl_tdb


System Administration tools                                     VFS_ACL_TDB(8)

       vfs_acl_tdb - Save NTFS-ACLs in a tdb file

       vfs objects = acl_tdb

       This VFS module is part of the samba(7) suite.

       The vfs_acl_tdb VFS module stores NTFS Access Control Lists (ACLs) in a
       tdb file. This enables the full mapping of Windows ACLs on Samba

       The ACL settings are stored in $LOCKDIR/file_ntacls.tdb.

       This module forces the following parameters:

              o   inherit acls = true

              o   dos filemode = true

              o   force unknown acl user = true

       This module is stackable.

       acl_tdb:ignore system acls = [yes|no]
           When set to yes, a best effort mapping from/to the POSIX ACL layer
           will not be done by this module. The default is no, which means
           that Samba keeps setting and evaluating both the system ACLs and
           the NT ACLs. This is better if you need your system ACLs be set for
           local or NFS file access, too. If you only access the data via
           Samba you might set this to yes to achieve better NT ACL

           If acl_tdb:ignore system acls is set to yes, the following
           additional settings will be enforced:

                  o   create mask = 0666

                  o   directory mask = 0777

                  o   map archive = no

                  o   map hidden = no

                  o   map readonly = no

                  o   map system = no

                  o   store dos attributes = yes

       acl_tdb:default acl style = [posix|windows|everyone]
           This parameter determines the type of ACL that is synthesized in
           case a file or directory lacks an security.NTACL xattr.

           When set to posix, an ACL will be synthesized based on the POSIX
           mode permissions for user, group and others, with an additional ACE
           for NT Authority\SYSTEM will full rights.

           When set to windows, an ACL is synthesized the same way Windows
           does it, only including permissions for the owner and NT

           When set to everyone, an ACL is synthesized giving full permissions
           to everyone (S-1-1-0).

           The default for this option is posix.

       The original Samba software and related utilities were created by
       Andrew Tridgell. Samba is now developed by the Samba Team as an Open
       Source project similar to the way the Linux kernel is developed.

       See attributes(7) for descriptions of the following attributes:

       |Availability   | service/network/samba |
       |Stability      | Volatile              |
       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from

       Further information about this software can be found on the open source
       community website at http://www.samba.org/.

Samba 4.9.3                       01/24/2019                    VFS_ACL_TDB(8)