Returning Error Code

Is it possible to return an error code from a开发者_StackOverflow perl script?

I am writing perl script which takes a parameter KEY,

Now to cover up negative scenario, like file open failure Key already exist etc,

I want to return different error code, like enum { FILE_OPEN_FAILED, DUPLICATE_KEY }

This perl script is called from a C function and depending on the error code I need to generate ALARMS.

Please Help...

Thanks, V-Anu

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exit, die and END blocks can set the exit code.