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Updated: Thursday, June 13, 2019
 
 

smbcacls (1)

Name

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

Synopsis

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]

Description

SMBCACLS(1)                      User Commands                     SMBCACLS(1)



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

SYNOPSIS
       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]

DESCRIPTION
       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.

OPTIONS
       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.

       --numeric
           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.

       -t|--test-args
           Don't actually do anything, only validate the correctness of the
           arguments.

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

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

       --sddl
           Output and input acls in sddl format.

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

       -d|--debuglevel=level
           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.

       -V|--version
           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.

       -l|--log-basename=logdirectory
           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.

       --option=<name>=<value>
           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.

       -N|--no-pass
           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.

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

       -C|--use-ccache
           Try to use the credentials cached by winbind.

       -A|--authentication-file=filename
           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.

       -U|--user=username[%password]
           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
           used.

           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.

       -P|--machine-pass
           Use stored machine account password.

       -e|--encrypt
           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.

       --pw-nt-hash
           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.

       -W|--workgroup=domain
           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
           options.

       -?|--help
           Print a summary of command line options.

       --usage
           Display brief usage message.

ACL FORMAT
       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:

              o   #define SEC_ACE_FLAG_OBJECT_INHERIT 0x1

              o   #define SEC_ACE_FLAG_CONTAINER_INHERIT 0x2

              o   #define SEC_ACE_FLAG_NO_PROPAGATE_INHERIT 0x4

              o   #define SEC_ACE_FLAG_INHERIT_ONLY 0x8


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

       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.

              o   R - Allow read access

              o   W - Allow write access

              o   X - Execute permission on the object

              o   D - Delete the object

              o   P - Change permissions

              o   O - Take ownership


       The following combined permissions can be specified:

              o   READ - Equivalent to 'RX' permissions

              o   CHANGE - Equivalent to 'RXWD' permissions

              o   FULL - Equivalent to 'RWXDPO' permissions

EXIT STATUS
       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.

VERSION
       This man page is part of version 4.9.3 of the Samba suite.

AUTHOR
       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
       Bokovoy.



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


       +---------------+-----------------------+
       |ATTRIBUTE TYPE |   ATTRIBUTE VALUE     |
       +---------------+-----------------------+
       |Availability   | service/network/samba |
       +---------------+-----------------------+
       |Stability      | Volatile              |
       +---------------+-----------------------+
NOTES
       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from
       https://download.samba.org/pub/samba/stable/samba-4.9.3.tar.gz

       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                       SMBCACLS(1)