NAME

setcifsacl - Userspace helper to alter components of a security descriptor for Common Internet File System (CIFS)

SYNOPSIS

setcifsacl [-v|-U|-a|-A|-D|-M|-S|-o|-g] "{one or more ACEs or a SID}" {file system object}

DESCRIPTION

This tool is part of the cifs-utils suite.

setcifsacl is a userspace helper program for the Linux CIFS client file system. It is intended to alter an ACL or set owner/group SID of a security descriptor for a file system object. Whether a security descriptor to be set is applied or not is determined by the CIFS/SMB server.

This program uses a plugin to handle the mapping of user and group names to SIDs. /etc/cifs-utils/idmap-plugin should be a symlink that points to the correct plugin to use.

OPTIONS

-h

Print usage message and exit.

-v

Print version number and exit.

-U

Apply ACE editing actions (-a, -D, -M, -S) to SACL (aUdit ACL). The actions are appliend to DACL if -U is not specified.

-a

Add one or more ACEs to an ACL of a security descriptor. An ACE is added even if the same ACE exists in the ACL.

-A

Add one or more ACEs to the ACL of a security descriptor, while maintaining the preferred order of the ACEs. The preferred order of ACEs are described in the following documentation: https://docs.microsoft.com/en-us/windows/win32/secauthz/order-of-aces-in-a-dacl

-D

Delete one or more ACEs from an ACL of a security descriptor. Entire ACE has to match in an existing ACL for the listed ACEs to be deleted.

-M

Modify one or more ACEs from an ACL of a security descriptor. SID and type are used to match for existing ACEs to be modified with the list of ACEs specified.

-S

Set an ACL of security descriptor with the list of ACEs Existing ACL is replaced entirely with the specified ACEs.

-o

Set owner SID to one specified as a command line argument.

-g

Set group SID to one specified as a command line argument.

The owner/group SID can be specified as a name or a raw SID value. Every ACE entry starts with "ACL:" One or more ACEs are specified within double quotes. Multiple ACEs are separated by a comma.

Following fields of a DACL ACE can be modified with possible values:

SID - Either a name or a raw SID value.
type - ALLOWED (0x0), DENIED (0x1), OBJECT_ALLOWED (0x5), OBJECT_DENIED (0x6)
flags - OBJECT_INHERIT_FLAG (OI or 0x1), CONTAINER_INHERIT_FLAG (CI or 0x2), NO_PROPAGATE_INHERIT_FLAG (NI or 0x4), INHERIT_ONLY_FLAG (IO or 0x8), INHERITED_ACE_FLAG (IA or 0x10) or a combination/OR of these values.
mask - Either one of FULL, CHANGE, READ, a combination of R W X D P O, or a hex value.

Following fields of a SACL ACE can be modified with possible values:

SID - Either a name or a raw SID value.
type - AUDIT (0x2), AUDIT_OBJECT (0x7), AUDIT_CALLBACK (0xD), AUDIT_CALLBACK_OBJECT (0xF), MANDATORY_LABEL (0x11), RESOURCE_ATTRIBUTE (0x12), SCOPED_POLICY_ID (0x13)
flags - SUCCESSFULL_ACCESS (SA or 0x40), FAILED_ACCESS (FA or 0x80)
mask - Either one of FULL, CHANGE, READ, a combination of R W X D P O, or a hex value.