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Why does bogofilter give return codes like 0 and 256 when its run from inside a program?

April 26, 2017bogofilter program Return run

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Why does bogofilter give return codes like 0 and 256 when its run from inside a program?

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Likely the return codes are being reformatted by waitpid(2). In C use WEXITSTATUS(status) in sys/wait.h, or comparable macro, to get the correct value. In Perl you can just use ‘system(“bogofilter $input”) >> 8’. If you want more info, run “man waitpid”.