---
title: handleOpen
framework: kernel
role: pseudoSymbol
path: kernel/iofirewireavcunit/1813842-handleopen
---

# handleOpen

Overrideable method to control the open / close behaviour of an IOService.

## Declaration

```occ
virtual bool handleOpen(
 IOService *forClient, 
 IOOptionBits options, 
 void *arg ); 
```

## Parameters

- `forClient`: Designates the client of the provider requesting the open.
- `options`: Options for the open, may be interpreted by the implementor of handleOpen.

## Return Value

Return Value Return true if the open was successful, false otherwise.

## Overview

Overview See IOService for discussion.

## See Also

### Miscellaneous

- [AVCCommand](kernel/iofirewireavcunit/1813829-avccommand.md)
- [AVCCommandInGeneration](kernel/iofirewireavcunit/1813833-avccommandingeneration.md)
- [handleClose](kernel/iofirewireavcunit/1813838-handleclose.md)
- [matchPropertyTable](kernel/iofirewireavcunit/1813847-matchpropertytable.md)
- [updateAVCCommandTimeout](kernel/iofirewireavcunit/1813851-updateavccommandtimeout.md)