As formatting marks. Good catch. The first argument of printf (not counting the file handle) is the format string. % is a special character in the format string. A spate of vulnerabilities that surfaced last year were caused by user text being used as a format string.

If you do need to use printf for whatever reason, there's a couple of alternatives: 

printf BIDWATCH '%s', $part->bodyhandle->as_string;

[download]
and 
$s = $part->bodyhandle->as_string;
$s =~ s/%/%%/g;
printf BIDWATCH $s;

[download]

In reply to Re^2: Force Ascii Write by ikegami
in thread Force Ascii Write by Kzin

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