Both Corion & kennethk, quite correctly, refer you to read.

However, IMO, what the aforementioned doc doesn't explicitly tell you is that (if LENGTH is specified) the call to read() should attempt to read no more than LENGTH bytes before returning i.e if the number of bytes successfully read from the file is less than LENGTH bytes, then the call will still be deemed successful (the call always returns the number of bytes actually read - which is stated in the doc).

Update

Wording modified in (what I think is) in line with ikegami's observation.

A user level that continues to overstate my experience :-))

In reply to Re: bin mode file copy by Bloodnok
in thread bin mode file copy by smanicka

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.