Technotes

ioNamePtr in File Manager Calls

Technote FL 23 November 1987

Revised by: March 1988
Written by: Jim Friedlander November 1987

It is very important to set ioNamePtr when making PB calls, even if you don't want those calls to return a name. Whenever Inside Macintosh indicates that ioNamePtr is either required for input or returns something, you must set ioNamePtr to either nil (if you aren't using a name) or to point to storage for a Str255.

If you don't explicitly set ioNamePtr, strange and unusual crashes may occur, depending on the machine/configuration your code is run on.

Further Reference:

* The File Manager

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