Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
Honored monks:

I use Perl under WinXP and Mac OS X, but this question is specifically for WinXP (although I may want to port the script to Mac somedayP.

This script, index.pl, opens the current directory with the filehandle POSTED and looks for filenames beginning with a certain pattern, (/^(\d{6}[b-z]?) /). It analyzes each such filename with a series of regexps, then writes the results of its analysis for each filename to an output file (handle OUT) as tab-delimited text.

When it's done all such files -- when the while(($file = readdir(POSTED))) {...} loop is done -- it closes OUT and calls system to open it in NotePad.

Then I manually "select all" in NotePad, "copy", and close the file. The script then opens an Excel spreadsheet into which I paste the data for further manipulation. Here's the main code:

open(OUT, '>', 'index.txt') or die($!); &byfile; # subroutine to find, analyze, & write filenames printf STDERR ("%d lines processed\nwith header, " . "%d lines written to index.txt", $lines, $lines + 1); close(OUT); system("notepad index.txt"); system("index.xlsx");

Here's the problem: I often run this script iteratively to make sure that new files are getting treated properly, or when tweaking the program. At such times, I already have the spreadsheet open from the previous iteration. The script works all right, but I keep getting error messages on the terminal window: "The process cannot access the file because it is being used by another process." Not only is this a nuisance, but the script has wasted time (I don't know if any significant amount) in vainly trying to open a file that's already open.

My question, then: How can I test whether the spreadsheet is already "being used by another program" (namely, Excel)? I can't do a filehandle test because I didn't open it in Perl.

Respectfully awaiting enlightenment,
Your humble student Thnidu


In reply to is this file open? by thnidu

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others meditating upon the Monastery: (12)
    As of 2014-09-22 18:15 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (198 votes), past polls