my $result = `blastall -i foo -o bar -p blastx -d baz`;
die("Could not execute blastall: $!\n")    if !defined($result);
die("Died from signal ", ($? & 127), "\n") if $? & 127;
die("Exited with error ", ($? >> 8), "\n") if $? >> 8;

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In reply to Re^3: Capture external program return value by ikegami
in thread Capture external program return value by llancet

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