Normally I'd recommend manipulating __WARN__ and __DIE__ in %SIG

But since this is a wrapper around a C lib you might really need to temporarily redirect STDERR and STDOUT to a variable.

See description in https://perldoc.pl/functions/open.html#Duping-filehandles if wanna do it without extra capture module.

Furthermore does the module https://metacpan.org/pod/Graphics::TIFF claim that

The Perl bindings follow the C API very closely, and the C reference documentation should be considered the canonical source.

And http://www.libtiff.org/libtiff.html#Errors offers hooks to handle errors. So you should check if it's an undocumented feature of the Perl wrapper.

HTH

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re: How to capture (intercept) output (warnings) of a module by LanX
in thread How to capture (intercept) output (warnings) of a module by davidfilmer

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