Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

Comment on

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

The problem stems from the fact that under Win32 you can't delete a file that the OS regards as open. Here is an example.

$file = 'c:\test.txt'; open F, ">$file" or die "Can't open $file $!\n"; # uncomment this to gain permission to unlink $file... # close F; unlink $file or die "Can't unlink $file $!\n";

If you close the filehandle opened on $file you can unlink it, if not you get permission denied. When you run your script with an output redirect to a file the OS filehandle on that file is not closed until the shell has finished running your script, ergo you can't delete that redirect file until your script finishes but you need the script running to do the unlink. Catch 22. Solution: write and delete the file from within your script. This works fine:

$file = "c:\\test.txt"; `dir c: > $file`; unlink $file or die "Can't unlink $file $!\n";

I can't see any good reason to do it but you can do this on the command line:

perl somscript.pl > somefile.txt; del somefile.txt

PS the or $! == 2 makes no sense to me as $! is unlikely to ever contain a string that evals to 2

cheers

tachyon

s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print


In reply to Re: Unlink Permission Denied by tachyon
in thread Unlink Permission Denied by Marza

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, 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
  • 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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others rifling through the Monastery: (3)
    As of 2018-05-25 22:56 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Notices?