Inside Macintosh: Files /

Chapter 2 - File Manager / File Manager Reference

High-Level Volume Access Routines / Manipulating the Default Volume

GetVol

You can use the GetVol function to determine the current default volume and possibly also the default directory.

FUNCTION GetVol (volName: StringPtr; VAR vRefNum: Integer): OSErr;

volName

A pointer to the name of the default volume.

vRefNum

A volume reference number or a working directory reference number.

DESCRIPTION

The GetVol function returns a pointer to the name of the default volume in the volName parameter and its volume reference number in the vRefNum parameter. If the default directory has a working directory associated with it, the vRefNum parameter instead contains a working directory reference number (which encodes both the volume reference number and the default directory ID). However, if, in a previous call to HSetVol (or PBHSetVol), a working directory reference number was passed in, GetVol returns a volume reference number in the vRefNum parameter.

RESULT CODES

noErr	0	No error
nsvErr	-35	No such volume