Chapter 10. Error handling
The Get-SystemInfo function we wrote earlier was designed from the outset to log the names of computers it failed to reach. In this chapter, we’ll make that happen, through a set of techniques collectively known as error handling.
10.1. It’s all about the action
Whenever a PowerShell command—be it a native cmdlet or a function you write—encounters a non-terminating error, it asks PowerShell what to do. PowerShell looks at a built-in variable, $ErrorActionPreference, to see what it should do.
Before we dive into that, let’s talk about this non-terminating error thing. It’s any error that presents a problem, but one from which the command can recover and continue. “Hey, this computer was unreachable, but if you want, ...
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