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How do I handle binary data correctly?

by faq_monk (Initiate)
on Oct 08, 1999 at 00:20 UTC ( #637=perlfaq nodetype: print w/replies, xml ) Need Help??

Current Perl documentation can be found at perldoc.perl.org.

Here is our local, out-dated (pre-5.6) version:

Perl is binary clean, so this shouldn't be a problem. For example, this works fine (assuming the files are found):

    if (`cat /vmunix` =~ /gzip/) {
        print "Your kernel is GNU-zip enabled!\n";
    }

On some systems, however, you have to play tedious games with ``text'' versus ``binary'' files. See binmode.

If you're concerned about 8-bit ASCII data, then see the perllocale manpage.

If you want to deal with multibyte characters, however, there are some gotchas. See the section on Regular Expressions.

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[Corion]: I don't think the EUMM-generated Makefile is that complicated ;)
[stevieb]: Corion++
[jedikaiti]: RonW++ #I have so much accumulated in my memory that finding the right item at a given moment often fails
[LanX]: corion only > 800 lines
[stevieb]: ahhh you're talking about the actual Makefile, not the PP Makefile.PL
[Corion]: LanX: But most of that is just setup of variables to be used later, like CC , LIB etc.
[LanX]: yes and some builders try to avoid it
[RonW]: :)

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