You might like to know I wrote a CPAN module to mock system calls, by recording the real thing and playing it back later. It's called Test::MockCommand and, with the above discussion as a caveat, captures most ways of invoking an external command in Perl.

http://search.cpan.org/~kyz/Test-MockCommand-0.02/

In reply to Re: mocking or trapping system calls by kyz
in thread mocking or trapping system calls by wu-lee

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