ACE_HEADER

The ACE_HEADER structure describes the type and size of an access-control entry (ACE).

typedef struct _ACE_HEADER { // acehdr

BYTE AceType;

BYTE AceFlags;

WORD AceSize;

} ACE_HEADER;

Members

AceType

Specifies the ACE type. This member can be one of the following values:

Value	ACE type
ACCESS_ALLOWED_ACE_TYPE	Access-allowed (defined by the ACCESS_ALLOWED_ACE structure)
ACCESS_DENIED_ACE_TYPE	Access-denied (defined by the ACCESS_DENIED_ACE structure)
SYSTEM_AUDIT_ACE_TYPE	System-audit (defined by the SYSTEM_AUDIT_ACE structure)

System-alarm ACEs are not supported in the current version of Windows NT. Applications cannot use the SYSTEM_ALARM_ACE_TYPE value or SYSTEM_ALARM_ACE structure.

AceFlags

Specifies a set of ACE type-specific control flags. This member can be a combination of the following values:

Value

Meaning

CONTAINER_INHERIT_ACE

The ACE is inherited by container objects, such as directories.

INHERIT_ONLY_ACE

The ACE does not apply to the container object, but to objects contained by it.

NO_PROPAGATE_INHERIT_ACE

The OBJECT_INHERIT_ACE and CONTAINER_INHERIT_ACE bits are not propagated to an inherited ACE.

OBJECT_INHERIT_ACE

The ACE is inherited by noncontainer objects, such as files created within the container object to which the ACE is assigned.

FAILED_ACCESS_ACE_FLAG

Used with system-audit and system-alarm ACEs to indicate a message is generated for failed access attempts.

SUCCESSFUL_ACCESS_ACE_FLAG

Used with system-audit and system-alarm ACEs to indicate a message is generated for successful access attempts.

AceSize

Specifies the size, in bytes, of the ACE.

Remarks

An ACE defines access to an object for a specific user or group or defines the types of access that generate system-administration messages or alarms for a specific user or group. The user or group is identified by a security identifier (SID).

See Also

ACCESS_ALLOWED_ACE, ACCESS_DENIED_ACE, ACL, SYSTEM_ALARM_ACE, SYSTEM_AUDIT_ACE

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