If this process takes place on an NT machine, and the file is hosted on a Win32 file system (NTFS or any FAT system), then you will have a problem if the program writing to the logfile has a lock on it, because under Windows, respecting a file lock is not a consentual activity but file locks are enforced by the operating system. So you might have to stop the log writing program, truncate the log, and then restart the log writing program again.

You might be lucky and the program maybe closes the file after each line written to it, so you could wait in a tight loop to move the file away if you get lock violations when opening the file.

In reply to Re: Help - Deleting a log line with a data older than 14 days by Corion
in thread Help - Deleting a log line with a data older than 14 days by Roshan_2004

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.