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  "title" : "FSVolume.OpenCloseOperations"
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# FSVolume.OpenCloseOperations

Methods and properties implemented by volumes that want to receive open and close calls for each item.

```
protocol OpenCloseOperations : NSObjectProtocol
```

## Overview

When a file system volume conforms to this protocol, the kernel layer issues an open call to indicate desired access, and a close call to indicate what access to retain.
A file is fully closed when the kernel layer issues a close call with no retained open nodes.
When a file system receives the close call, it removes all access to the item.
When all memory mappings to the item release, the kernel layer issues a final close.

If a file system volume doesn’t conform to this protocol, the kernel layer can skip making such calls to the volume.

> Deprecated: Use ``doc://FSKit/documentation/FSKit/FSVolume/OpenCloseHandler`` instead.

## Topics

### Opening and closing

[`openItem(_:modes:replyHandler:)`](/documentation/FSKit/FSVolume/OpenCloseOperations/openItem(_:modes:replyHandler:))

Opens a file for access.

[`closeItem(_:modes:replyHandler:)`](/documentation/FSKit/FSVolume/OpenCloseOperations/closeItem(_:modes:replyHandler:))

Closes a file from further access.

[`FSVolume.OpenModes`](/documentation/FSKit/FSVolume/OpenModes)

Defined modes for opening a file.

### Inspecting volume properties

[`isOpenCloseInhibited`](/documentation/FSKit/FSVolume/OpenCloseOperations/isOpenCloseInhibited)

A Boolean value that instructs FSKit not to call this protocol’s methods, even if the volume conforms to it.


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