Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

Comment on

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

Yes, use flock. And strict, warnings and 3-argument open. Some sample locking code follows. Adjust according to your needs.

use strict; use warnings; use Fcntl ':flock'; # import LOCK_* constants open(my $fhlock, '>', $somelockfile) or die "Error: open '$somelockfil +e': $!"; # Note: process will block at this point until the lock is acquired. flock($fhlock, LOCK_EX) or die "Error: flock '$somelockfile': $!"; # Lock is now held until $fhlock is closed. # Note that even if this program crashes or is killed, $fhlock will # be closed by the OS and the lock released. # ... # Release the lock simply by closing the file handle. close $fhlock or die "Error: close '$somelockfile': $!";


In reply to Re: Lock File by eyepopslikeamosquito
in thread Lock File by toniax

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
  • 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 the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others drinking their drinks and smoking their pipes about the Monastery: (5)
    As of 2015-07-05 21:41 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









      Results (68 votes), past polls