From close in perldoc (emphasis added):

If the filehandle came from a piped open, close returns false if one of the other syscalls involved fails or if its program exits with non-zero status. If the only problem was that the program exited non-zero, $! will be set to 0.

So, by setting your pipe program to exit 1 you are ensuring that close() fails (i.e., returns false). autodie is working correctly here.

how should I check for errors? 
#! perl
use strict;
use warnings;
use autodie;

open(my $fh, '-|', 'bash -c "echo Hello; exit 1"');
print <$fh>;

{
    no autodie;

    unless (close($fh))
    {
        die "Real pipe error: $!" if $!;
    }
}

print "status: ", ($? >> 8), "\n";

[download]

HTH,

Athanasius <°(((>< contra mundum

In reply to Re: close and autodie on pipes by Athanasius
in thread close and autodie on pipes by apomatix

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