Re: return value from system call, exit status, shift right 8, bitwise and, $?

Others have covered your original question pretty well so I'll just chip in that I'm a fan of this construct in my code to get both the output and the RC.

This doesn't quite cover all the bases but can be expanded to do so.

    eval { open P,"$cmd 2>&1 |"; };
    if($@) { die('Cant launch cmd') }
    my @output=<P>;
    close P;
    my $rc = $? >> 8;
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