Inside Macintosh: Files /

Chapter 2 - File Manager / File Manager Reference

High-Level Volume Access Routines / Manipulating the Default Volume

HSetVol

You can use the HSetVol function to set both the default volume and the default directory.

FUNCTION HSetVol (volName: StringPtr; vRefNum: Integer; 
                  dirID: LongInt): OSErr;

volName

A pointer to the name of a mounted volume or the partial pathname
of a directory.

vRefNum

A volume reference number or a working directory reference number.

dirID

A directory ID.

DESCRIPTION

The HSetVol function lets you specify the default directory by volume reference number, by directory ID, or by a combination of working directory reference number
and partial pathname (beginning from that working directory).

WARNING

Use of the HSetVol function is discouraged if your application may execute in system software versions prior to version 7.0. Because the specified directory might not itself be a working directory, HSetVol records the default volume and directory separately, using the volume reference number of the volume and the actual directory ID of the specified directory. Subsequent calls to GetVol (or PBGetVol) return only the volume reference number, which will cause that volume's root directory (rather than the default directory, as expected) to be accessed.

Note

Both the default volume and the default directory are used in calls made with no volume name, a volume reference number of 0, and a directory ID of 0.

RESULT CODES

noErr	0	No error
nsvErr	-35	No such volume
bdNamErr	-37	Bad volume name
fnfErr	-43	Directory not found
paramErr	-50	No default volume
afpAccessDenied	-5000	User does not have access to the directory