CIM_DeviceFile class

Makale
01/06/2021

The CIM_DeviceFile class represents a type of logical file, which represents a device. This convention is useful for operating systems that manage devices using a byte stream I/O model. The logical device that is associated with this file is specified using the CIM_DeviceAccessedByFile relationship.

Important

The DMTF (Distributed Management Task Force) CIM (Common Information Model) classes are the parent classes upon which WMI classes are built. WMI currently supports only the CIM 2.x version schemas.

The following syntax is simplified from Managed Object Format (MOF) code and includes all inherited properties. Properties are listed in alphabetic order, not MOF order.

Syntax

[Abstract, UUID("{4333BD60-E3D1-11d2-8601-0000F8102E5F}"), AMENDMENT]
class CIM_DeviceFile : CIM_LogicalFile
{
  uint32   AccessMask;
  boolean  Archive;
  string   Caption;
  boolean  Compressed;
  string   CompressionMethod;
  string   CreationClassName;
  datetime CreationDate;
  string   CSCreationClassName;
  string   CSName;
  string   Description;
  string   Drive;
  string   EightDotThreeFileName;
  boolean  Encrypted;
  string   EncryptionMethod;
  string   Extension;
  string   FileName;
  uint64   FileSize;
  string   FileType;
  string   FSCreationClassName;
  string   FSName;
  boolean  Hidden;
  datetime InstallDate;
  uint64   InUseCount;
  datetime LastAccessed;
  datetime LastModified;
  string   Name;
  string   Path;
  boolean  Readable;
  string   Status;
  boolean  System;
  boolean  Writeable;
};

Members

The CIM_DeviceFile class has these types of members:

Methods
Properties

Methods

The CIM_DeviceFile class has these methods.

Method	Description
ChangeSecurityPermissions	Changes the security permissions for the logical file specified in the object path. Not implemented by WMI.
ChangeSecurityPermissionsEx	Changes the security permissions for the logical file specified in the object path. Not implemented by WMI.
Compress	Compresses the logical file (or directory) specified in the object path. Not implemented by WMI.
CompressEx	Compresses the logical file (or directory) specified in the object path. Not implemented by WMI.
Copy	Copies the logical file (or directory) specified in the object path to the location specified by the input parameter. Not implemented by WMI.
CopyEx	Copies the logical file (or directory) specified in the object path to the location specified by the input parameter. Not implemented by WMI.
Delete	Deletes the logical file (or directory) specified in the object path. Not implemented by WMI.
DeleteEx	Deletes the logical file (or directory) specified in the object path. Not implemented by WMI.
GetEffectivePermission	Determines whether the caller has the aggregated permissions specified by the Permission argument. Not implemented by WMI.
Rename	Renames the logical file (or directory) specified in the object path. Not implemented by WMI.
TakeOwnerShip	Obtains ownership of the logical file specified in the object path. Not implemented by WMI.
TakeOwnerShipEx	Obtains ownership of the logical file specified in the object path. Not implemented by WMI.
Uncompress	Uncompresses the logical file (or directory) specified in the object path. Not implemented by WMI.
UncompressEx	Uncompresses the logical file (or directory) specified in the object path. Not implemented by WMI.

Properties

The CIM_DeviceFile class has these properties.

AccessMask

Data type: uint32
Access type: Read-only
Qualifiers: Schema ("Win32"), DisplayName ("Access Rights")

Bit array that represents the access rights to the given file or directory held by the user or group on whose behalf the instance is returned. On FAT volumes, FULL_ACCESS is returned, which indicates that no security has been set on the object.

This property is inherited from CIM_LogicalFile.

FILE_READ_DATA (file) or FILE_LIST_DIRECTORY (directory) (1)

Grants the right to read data from the file. For a directory, this value grants the right to list the contents of the directory.

FILE_WRITE_DATA (file) or FILE_ADD_FILE (directory) (2)

Grants the right to write data to the file. For a directory, this value grants the right to create a file in the directory.

FILE_APPEND_DATA (file) or FILE_ADD_SUBDIRECTORY (directory) (4)

Grants the right to append data to the file. For a directory, this value grants the right to create a subdirectory.

FILE_READ_EA (8)

Grants the right to read extended attributes.

FILE_WRITE_EA (16)

Grants the right to write extended attributes.

FILE_EXECUTE (file) or FILE_TRAVERSE (directory) (32)

Grants the right to execute a file. For a directory, the directory can be traversed.

FILE_DELETE_CHILD (directory) (64)

Grants the right to delete a directory and all the files it contains (its children), even if the files are read-only.

FILE_READ_ATTRIBUTES (128)

Grants the right to read file attributes.

FILE_WRITE_ATTRIBUTES (256)

Grants the right to change file attributes.

DELETE (65536)

Grants delete access.

READ_CONTROL (131072)

Grants read access to the security descriptor and owner.

WRITE_DAC (262144)

Grants write access to the discretionary ACL.

WRITE_OWNER (524288)

Assigns the write owner.

SYNCHRONIZE (1048576)

Synchronizes access and allows a process to wait for an object to enter the signaled state.

Archive

Data type: boolean
Access type: Read-only
Qualifiers: Schema ("Win32"), DisplayName ("Should Be Archived")

If True, the file should be archived.

This property is inherited from CIM_LogicalFile.

Caption

Data type: string
Access type: Read-only
Qualifiers: MaxLen (64), DisplayName ("Caption")

Short textual description of the object.

This property is inherited from CIM_ManagedSystemElement.

Compressed

Data type: boolean
Access type: Read-only
Qualifiers: Schema ("Win32"), DisplayName ("Compressed")

If True, the file is compressed.

This property is inherited from CIM_LogicalFile.

CompressionMethod

Data type: string
Access type: Read-only
Qualifiers: DisplayName ("Compression Method")

Free-form string that indicates the algorithm or tool used to compress the logical file. If the compression scheme is unknown or not described, use "Unknown". If the logical file is compressed, but the compression scheme is unknown or not described, use "Compressed". If the logical file is not compressed, use "Not Compressed".

This property is inherited from CIM_LogicalFile.

CreationClassName

Data type: string
Access type: Read-only
Qualifiers: CIM_Key, DisplayName ("Class Name")

Name of the class.

This property is inherited from CIM_LogicalFile.

CreationDate

Data type: datetime
Access type: Read-only
Qualifiers: DisplayName ("Creation Date")

File's creation date.

This property is inherited from CIM_LogicalFile.

CSCreationClassName

Data type: string
Access type: Read-only
Qualifiers: Propagated ("CIM_FileSystem.CSCreationClassName"), CIM_Key, DisplayName ("Computer System Class Name")

Class of the computer system.

This property is inherited from CIM_LogicalFile.

CSName

Data type: string
Access type: Read-only
Qualifiers: Propagated ("CIM_FileSystem.CSName"), CIM_Key, DisplayName ("Computer System Name")

Name of the computer system.

This property is inherited from CIM_LogicalFile.

Description

Data type: string
Access type: Read-only
Qualifiers: DisplayName ("Description")

Textual description of the object.

This property is inherited from CIM_ManagedSystemElement.

Drive

Data type: string
Access type: Read-only
Qualifiers: Fixed, Schema ("Win32"), DisplayName ("Drive")

Drive letter (including the colon that follows the drive letter) of the file. This property is inherited from CIM_LogicalFile.

Example: "c:"

EightDotThreeFileName

Data type: string
Access type: Read-only
Qualifiers: Schema ("Win32"), DisplayName ("Eight Dot Three File Name")

DOS-compatible file name for the file. This property is inherited from CIM_LogicalFile.

Example: "c:\progra~1"

Encrypted

Data type: boolean
Access type: Read-only
Qualifiers: Schema ("Win32"), DisplayName ("Encrypted")

If True, the file is encrypted.

This property is inherited from CIM_LogicalFile.

EncryptionMethod

Data type: string
Access type: Read-only
Qualifiers: DisplayName ("Encryption Method")

Free-form string that identifies the algorithm or tool used to encrypt a logical file. If the encryption scheme is not indulged (for security reasons, for example), use "Unknown". If the file is encrypted, but either its encryption scheme is unknown or not disclosed, use "Encrypted". If the logical file is not encrypted, use "Not Encrypted".

This property is inherited from CIM_LogicalFile.

Extension

Data type: string
Access type: Read-only
Qualifiers: Fixed, Schema ("Win32"), DisplayName ("File Extension")

File name extension without the preceding period (dot).

This property is inherited from CIM_LogicalFile.

Example: "txt", "mof", "mdb"

FileName

Data type: string
Access type: Read-only
Qualifiers: Fixed, Schema ("Win32"), DisplayName ("File Name")

File name without the file name extension.

This property is inherited from CIM_LogicalFile.

Example: "MyDataFile"

FileSize

Data type: uint64
Access type: Read-only
Qualifiers: DisplayName ("Size"), Units ("bytes")

Size of the file, in bytes.

This property is inherited from CIM_LogicalFile.

For more information about using uint64 values in scripts, see Scripting in WMI.

FileType

Data type: string
Access type: Read-only
Qualifiers: Schema ("Win32"), DisplayName ("File Type")

Descriptor that represents the file type (indicated by the Extension property).

This property is inherited from CIM_LogicalFile.

FSCreationClassName

Data type: string
Access type: Read-only
Qualifiers: Propagated ("CIM_FileSystem.CreationClassName"), CIM_Key, DisplayName ("File System Class Name")

Class of the file system.

This property is inherited from CIM_LogicalFile.

FSName

Data type: string
Access type: Read-only
Qualifiers: Propagated ("CIM_FileSystem.Name"), CIM_Key, DisplayName ("File System Name")

Name of the file system.

This property is inherited from CIM_LogicalFile.

Hidden

Data type: boolean
Access type: Read-only
Qualifiers: Schema ("Win32"), DisplayName ("Hidden")

If True, the file is hidden.

This property is inherited from CIM_LogicalFile.

InstallDate

Data type: datetime
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|ComponentID|001.5"), DisplayName ("Install Date")

Date and time when the object was installed. This property does not need a value to indicate that the object is installed.

This property is inherited from CIM_ManagedSystemElement.

InUseCount

Data type: uint64
Access type: Read-only
Qualifiers: DisplayName ("Current File Open Count")

Number of "file opens" that are currently active against the file.

This property is inherited from CIM_LogicalFile.

For more information about using uint64 values in scripts, see Scripting in WMI.

LastAccessed

Data type: datetime
Access type: Read-only
Qualifiers: DisplayName ("Last Accessed")

Date and time that the file was last accessed.

This property is inherited from CIM_LogicalFile.

LastModified

Data type: datetime
Access type: Read-only
Qualifiers: DisplayName ("Last Modified")

Date and time that the file was last modified.

This property is inherited from CIM_LogicalFile.

Name

Data type: string
Access type: Read-only
Qualifiers: Key

Inherited name that serves as a key of a logical file instance within a file system (provide full path names).

This property is inherited from CIM_ManagedSystemElement.

Example: "C:\Windows\system\win.ini"

Path

Data type: string
Access type: Read-only
Qualifiers: Fixed, Schema ("Win32"), DisplayName ("Path")

Path of the file including leading and trailing backslashes. This property is inherited from CIM_LogicalFile.

Example: "\windows\system\"

Readable

Data type: boolean
Access type: Read-only
Qualifiers: DisplayName ("Readable")

If True, the file can be read.

This property is inherited from CIM_LogicalFile.

Status

Data type: string
Access type: Read-only
Qualifiers: MaxLen (10), DisplayName ("Status")

String that indicates the current status of the object. Operational and nonoperational status can be defined. Operational status can include "OK", "Degraded", and "Pred Fail". "Pred Fail" indicates that an element is functioning properly, but is predicting a failure (for example, a SMART-enabled hard disk drive).

Nonoperational status can include "Error", "Starting", "Stopping", and "Service". "Service" can apply during disk mirror-resilvering, reloading a user permissions list, or other administrative work. Not all such work is online, but the managed element is neither "OK" nor in one of the other states.

This property is inherited from CIM_ManagedSystemElement.

Values include the following:

OK ("OK")

Error ("Error")

Degraded ("Degraded")

Unknown ("Unknown")

Pred Fail ("Pred Fail")

Starting ("Starting")

Stopping ("Stopping")

Service ("Service")

Stressed ("Stressed")

NonRecover ("NonRecover")

No Contact ("No Contact")

Lost Comm ("Lost Comm")

System

Data type: boolean
Access type: Read-only
Qualifiers: Schema ("Win32"), DisplayName ("System File")

If True, the file is a system file.

This property is inherited from CIM_LogicalFile.

Writeable

Data type: boolean
Access type: Read-only
Qualifiers: DisplayName ("Writeable")

If True, the file can be written.

This property is inherited from CIM_LogicalFile.

Remarks

The CIM_DeviceFile class is derived from CIM_LogicalFile.

WMI does not implement this class.

This documentation is derived from the CIM class descriptions published by the DMTF. Microsoft may have made changes to correct minor errors, conform to Microsoft SDK documentation standards, or provide more information.

Requirements

Requirement	Value
Minimum supported client	Windows Vista
Minimum supported server	Windows Server 2008
Namespace	Root\CIMV2
MOF	CIMWin32.mof
DLL	CIMWin32.dll

Aracılığıyla paylaş

CIM_DeviceFile class

Syntax

Members

Methods

Properties

Remarks

Requirements

See also

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