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:
* #define SEC_ACE_FLAG_OBJECT_INHERIT 0x1
* #define SEC_ACE_FLAG_CONTAINER_INHERIT 0x2
* #define SEC_ACE_FLAG_NO_PROPAGATE_INHERIT 0x4
* #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.
* 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
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 correct for version 4 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.
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