smbcacls - Set or get ACLs on an NT file or directory names


   smbcacls {//server/share} {/filename} [-D|--delete acl]
    [-M|--modify acl] [-a|--add acl] [-S|--set acl] [-C|--chown name]
    [-G|--chgrp name] [-I allow|remove|copy] [--numeric] [-t]
    [-U username] [-d] [-e] [-m|--max-protocol LEVEL]
    [--query-security-info FLAGS] [--set-security-info FLAGS] [--sddl]
    [--domain-sid SID]


   This tool is part of the samba(7) suite.

   The smbcacls program manipulates NT Access Control Lists (ACLs) on SMB
   file shares. An ACL is comprised zero or more Access Control Entries
   (ACEs), which define access restrictions for a specific user or group.


   The following options are available to the smbcacls program. The format
   of ACLs is described in the section ACL FORMAT

   -a|--add acl
       Add the entries specified to the ACL. Existing access control
       entries are unchanged.

   -M|--modify acl
       Modify the mask value (permissions) for the ACEs specified on the
       command line. An error will be printed for each ACE specified that
       was not already present in the object's ACL.

   -D|--delete acl
       Delete any ACEs specified on the command line. An error will be
       printed for each ACE specified that was not already present in the
       object's ACL.

   -S|--set acl
       This command sets the ACL on the object with only what is specified
       on the command line. Any existing ACL is erased. Note that the ACL
       specified must contain at least a revision, type, owner and group
       for the call to succeed.

   -C|--chown name
       The owner of a file or directory can be changed to the name given
       using the -C option. The name can be a sid in the form S-1-x-y-z or
       a name resolved against the server specified in the first argument.

       This command is a shortcut for -M OWNER:name.

   -G|--chgrp name
       The group owner of a file or directory can be changed to the name
       given using the -G option. The name can be a sid in the form
       S-1-x-y-z or a name resolved against the server specified n the
       first argument.

       This command is a shortcut for -M GROUP:name.

   -I|--inherit allow|remove|copy
       Set or unset the windows "Allow inheritable permissions" check box
       using the -I option. To set the check box pass allow. To unset the
       check box pass either remove or copy. Remove will remove all
       inherited acls. Copy will copy all the inherited acls.

       This option displays all ACL information in numeric format. The
       default is to convert SIDs to names and ACE types and masks to a
       readable string format.

   -m|--max-protocol PROTOCOL_NAME
       This allows the user to select the highest SMB protocol level that
       smbcacls will use to connect to the server. By default this is set
       to NT1, which is the highest available SMB1 protocol. To connect
       using SMB2 or SMB3 protocol, use the strings SMB2 or SMB3
       respectively. Note that to connect to a Windows 2012 server with
       encrypted transport selecting a max-protocol of SMB3 is required.

       Don't actually do anything, only validate the correctness of the

   --query-security-info FLAGS
       The security-info flags for queries.

   --set-security-info FLAGS
       The security-info flags for queries.

       Output and input acls in sddl format.

   --domain-sid SID
       SID used for sddl processing.

       level is an integer from 0 to 10. The default value if this
       parameter is not specified is 0.

       The higher this value, the more detail will be logged to the log
       files about the activities of the server. At level 0, only critical
       errors and serious warnings will be logged. Level 1 is a reasonable
       level for day-to-day running - it generates a small amount of
       information about operations carried out.

       Levels above 1 will generate considerable amounts of log data, and
       should only be used when investigating a problem. Levels above 3
       are designed for use only by developers and generate HUGE amounts
       of log data, most of which is extremely cryptic.

       Note that specifying this parameter here will override the log
       level parameter in the smb.conf file.

       Prints the program version number.

   -s|--configfile=<configuration file>
       The file specified contains the configuration details required by
       the server. The information in this file includes server-specific
       information such as what printcap file to use, as well as
       descriptions of all the services that the server is to provide. See
       smb.conf for more information. The default configuration file name
       is determined at compile time.

       Base directory name for log/debug files. The extension ".progname"
       will be appended (e.g. log.smbclient, log.smbd, etc...). The log
       file is never removed by the client.

       Set the smb.conf(5) option "<name>" to value "<value>" from the
       command line. This overrides compiled-in defaults and options read
       from the configuration file.

       If specified, this parameter suppresses the normal password prompt
       from the client to the user. This is useful when accessing a
       service that does not require a password.

       Unless a password is specified on the command line or this
       parameter is specified, the client will request a password.

       If a password is specified on the command line and this option is
       also defined the password on the command line will be silently
       ingnored and no password will be used.

       Try to authenticate with kerberos. Only useful in an Active
       Directory environment.

       Try to use the credentials cached by winbind.

       This option allows you to specify a file from which to read the
       username and password used in the connection. The format of the
       file is

           username = <value>
           password = <value>
           domain   = <value>

       Make certain that the permissions on the file restrict access from
       unwanted users.

       Sets the SMB username or username and password.

       If %password is not specified, the user will be prompted. The
       client will first check the USER environment variable, then the
       LOGNAME variable and if either exists, the string is uppercased. If
       these environmental variables are not found, the username GUEST is

       A third option is to use a credentials file which contains the
       plaintext of the username and password. This option is mainly
       provided for scripts where the admin does not wish to pass the
       credentials on the command line or via environment variables. If
       this method is used, make certain that the permissions on the file
       restrict access from unwanted users. See the -A for more details.

       Be cautious about including passwords in scripts. Also, on many
       systems the command line of a running process may be seen via the
       ps command. To be safe always allow rpcclient to prompt for a
       password and type it in directly.

   -S|--signing on|off|required
       Set the client signing state.

       Use stored machine account password.

       This command line parameter requires the remote server support the
       UNIX extensions or that the SMB3 protocol has been selected.
       Requests that the connection be encrypted. Negotiates SMB
       encryption using either SMB3 or POSIX extensions via GSSAPI. Uses
       the given credentials for the encryption negotiation (either
       kerberos or NTLMv1/v2 if given domain/username/password triple.
       Fails the connection if encryption cannot be negotiated.

       The supplied password is the NT hash.

   -n|--netbiosname <primary NetBIOS name>
       This option allows you to override the NetBIOS name that Samba uses
       for itself. This is identical to setting the netbios name parameter
       in the smb.conf file. However, a command line setting will take
       precedence over settings in smb.conf.

   -i|--scope <scope>
       This specifies a NetBIOS scope that nmblookup will use to
       communicate with when generating NetBIOS names. For details on the
       use of NetBIOS scopes, see rfc1001.txt and rfc1002.txt. NetBIOS
       scopes are very rarely used, only set this parameter if you are the
       system administrator in charge of all the NetBIOS systems you
       communicate with.

       Set the SMB domain of the username. This overrides the default
       domain which is the domain defined in smb.conf. If the domain
       specified is the same as the servers NetBIOS name, it causes the
       client to log on using the servers local SAM (as opposed to the
       Domain SAM).

   -O|--socket-options socket options
       TCP socket options to set on the client socket. See the socket
       options parameter in the smb.conf manual page for the list of valid

       Print a summary of command line options.

       Display brief usage message.


   The format of an ACL is one or more entries separated by either commas
   or newlines. An ACL entry is one of the following:

       REVISION:<revision number>
       OWNER:<sid or name>
       GROUP:<sid or name>
       ACL:<sid or name>:<type>/<flags>/<mask>

   The revision of the ACL specifies the internal Windows NT ACL revision
   for the security descriptor. If not specified it defaults to 1. Using
   values other than 1 may cause strange behaviour.

   The owner and group specify the owner and group sids for the object. If
   a SID in the format S-1-x-y-z is specified this is used, otherwise the
   name specified is resolved using the server on which the file or
   directory resides.

   ACEs are specified with an "ACL:" prefix, and define permissions
   granted to an SID. The SID again can be specified in S-1-x-y-z format
   or as a name in which case it is resolved against the server on which
   the file or directory resides. The type, flags and mask values
   determine the type of access granted to the SID.

   The type can be either ALLOWED or DENIED to allow/deny access to the
   SID. The flags values are generally zero for file ACEs and either 9 or
   2 for directory ACEs. Some common flags are:

   *   #define SEC_ACE_FLAG_OBJECT_INHERIT 0x1



   *   #define SEC_ACE_FLAG_INHERIT_ONLY 0x8

   At present, flags can only be specified as decimal or hexadecimal

   The mask is a value which expresses the access right granted to the
   SID. It can be given as a decimal or hexadecimal value, or by using one
   of the following text strings which map to the NT file permissions of
   the same name.

   *   R - Allow read access

   *   W - Allow write access

   *   X - Execute permission on the object

   *   D - Delete the object

   *   P - Change permissions

   *   O - Take ownership

   The following combined permissions can be specified:

   *   READ - Equivalent to 'RX' permissions

   *   CHANGE - Equivalent to 'RXWD' permissions

   *   FULL - Equivalent to 'RWXDPO' permissions


   The smbcacls program sets the exit status depending on the success or
   otherwise of the operations performed. The exit status may be one of
   the following values.

   If the operation succeeded, smbcacls returns and exit status of 0. If
   smbcacls couldn't connect to the specified server, or there was an
   error getting or setting the ACLs, an exit status of 1 is returned. If
   there was an error parsing any command line arguments, an exit status
   of 2 is returned.


   This man page is correct for version 4 of the Samba suite.


   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.

   smbcacls was written by Andrew Tridgell and Tim Potter.

   The conversion to DocBook for Samba 2.2 was done by Gerald Carter. The
   conversion to DocBook XML 4.2 for Samba 3.0 was done by Alexander

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