[tpm] IO::Handle not catching errors

Madison Kelly linux at alteeve.com
Mon May 26 12:45:45 PDT 2008

Hi all,

   I use IO::Handle for shell calls, and then check 'error' to see if 
there was an error. However, this isn't catching errors... Can someone 
clue me in?

sub do_shell_call
	my ($shell_call)=@_;

	my $sc=IO::Handle->new();
	print "  Shell call: [$shell_call]\n";
	open ($sc, $shell_call) or die "Shell call: [$shell_call] failed with 
error: $!";
	my $output=0;
	while (<$sc>)
		if (!$output) { print "/----\n"; $output=1; }
		print "| $_";
	if ($output) { print "\\----\n"; }
	if ($sc->error)
		die "Shell call: [$shell_call] returned an error: $!";

	return 0;


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