Inside Macintosh: Operating System Utilities /

Chapter 2 - System Error Handler

This chapter describes the System Error Handler. The System Error Handler assumes control of the system when a system error occurs and is also responsible for displaying certain alert boxes in response to a system startup. The System Error Handler displays an alert box when a system error occurs and manages display of the "Welcome to Macintosh" alert box and the disk-switch alert box.

This chapter explains what the Operating System does when a system error is encountered, describes the routine and resource that the System Error Handler uses when generating a system error alert box, and discusses how you can provide code that can help your application recover from an system error.

Although your application may call the routine provided by the System Error Handler, ordinarily there is no need to do so; this routine is primarily used by the Macintosh Operating System.

This chapter also contains a list of all currently defined system errors and the conditions under which they can arise.

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Chapter Contents

About the System Error Handler

System Errors

Resume Procedures

System Error Handler Reference

System Error Handler Routines

Application-Defined Routines

Resources

The System Error Alert Table Resource

Summary of the System Error Handler

Pascal Summary

System Error Handler Routines

Application-Defined Routines

C Summary

System Error Handler Routines

Application-Defined Routines

Assembly-Language Summary

Global Variables