Inside Macintosh: Files /

Chapter 2 - File Manager / File Manager Reference

Shared Environment Routines / Controlling Login Access

PBHGetLogInInfo

You can use the PBHGetLogInInfo function to determine the login method used to log on to a particular shared volume.

FUNCTION PBHGetLogInInfo (paramBlock: HParmBlkPtr; 
                           async: Boolean): OSErr;

paramBlock

A pointer to an objParam variant of the HFS parameter block.

async

A Boolean value that specifies asynchronous (TRUE) or synchronous (FALSE) execution.

-->	ioCompletion	ProcPtr	A pointer to a completion routine.
<--	ioResult	OSErr	The result code of the function.
-->	ioVRefNum	Integer	The volume specification.
<--	ioObjType	Integer	The login method.
<--	ioObjNamePtr	Ptr	A pointer to the user name.

DESCRIPTION

The PBHGetLogInInfo function returns the method used for login and the user name specified at login time for the volume specified by the ioVRefNum field. The login user name is returned as a Pascal string in ioObjNamePtr. The maximum size of the user name is 31 characters. The login method type is returned in the ioObjType field. These values are recognized.

CONST
   kNoUserAuthentication   = 1;  {no password}
   kPassword               = 2;  {8-byte password}
   kEncryptPassword        = 3;  {encrypted 8-byte password}
   kTwoWayEncryptPassword  = 6;  {two-way random encryption}

Values in the range 7-127 are reserved for future use by Apple Computer, Inc. Values in the range 128-255 are available to your application as user-defined values.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for PBHGetLogInInfo are

Trap macro	Selector
_HFSDispatch	$0031

RESULT CODES

noErr	0	No error
nsvErr	-35	Specified volume doesn't exist
paramErr	-50	Function not supported by volume