Hmmm ... doesn't quite fit my situation. My edits will probably change the length of the lines, and the files are too big to load all at once.

Is it possible for me to

  1. Open the file for in-place edits
  2. Open a temp file for output
  3. Read the file a line at a time, writing the edited output to the temp file
  4. Close the temp file and open it for read
  5. Read the temp file line by line, writing back to the original file (which is still open for in-place edits)
???

Do I need to do something to truncate the original file before writing back to it, like setting its length to zero or something?

In reply to Re^4: Edit Macintosh file, keeping resource fork by forrest
in thread Edit Macintosh file, keeping resource fork by forrest

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.