Well you are describing a "broken" interface (to call it something). You cannot guarantee the copy will be ok. Imagine the other side writes to the file in chunks of 10k every twenty minutes for ...

On the pragmatic side, the idea is simple, check the length of the file every x seconds, copy when it hasn't changed in the last n checks (y = n * x); choose n wisely ;)

Actually on my to_do list is to check File::Monitor; might be useful to you.

While writing this it occurs to me a variation: have the previous check of the size done by a child process, and have the child change the name to *.ok. In the main program just copy the *ok.

cheers --stephan

In reply to Re: File Watching in Windows by sgt
in thread File Watching in Windows by Redjc1990

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.