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Top Forums Shell Programming and Scripting Avoid locking between two files: Post 302862075 by ctsgnb on Thursday 10th of October 2013 06:11:46 AM
Old 10-10-2013
Your scripts should use a flag to avoid conflict.

This flag should be created using an atomic operation (like mkdir or using clobber stuff).

Atomic means that if your both script tries to setup the flag at the same time, only one of them will pass and the second will fail.

But you will then have to check against the successful creation of the flag before your script run and erase the flag when it ends.

Last edited by ctsgnb; 10-10-2013 at 09:15 AM..
 

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Feed::Find(3pm) 					User Contributed Perl Documentation					   Feed::Find(3pm)

NAME
Feed::Find - Syndication feed auto-discovery SYNOPSIS
use Feed::Find; my @feeds = Feed::Find->find('http://example.com/'); DESCRIPTION
Feed::Find implements feed auto-discovery for finding syndication feeds, given a URI. It (currently) passes all of the auto-discovery tests at http://diveintomark.org/tests/client/autodiscovery/. Feed::Find will discover the following feed formats: o RSS 0.91 o RSS 1.0 o RSS 2.0 o Atom USAGE
Feed::Find->find($uri) Given a URI $uri, use a variety of techniques to find the feeds associated with that page. If $uri itself points to a feed (i.e., if the Content-Type of the response is a recognized feed type), returns $uri. Returns a list of feed URIs. The following techniques are used: 1. <link> tag auto-discovery If the page contains any <link> tags in the <head> section, these tags are examined for recognized feed content types. The following content types are treated as feeds: application/x.atom+xml, application/atom+xml, application/xml, text/xml, application/rss+xml, and application/rdf+xml. 2. Scanning <a> tags If the page does not contain any known <link> tags, the page is then scanned for <a> tags for links to URIs with certain file extensions. The following extensions are treated as feeds: .rss, .xml, and .rdf. Note that this technique is employed only if the first technique returns no results. Feed::Find->find_in_html($html [, $base_uri ]) Given a reference to a string $html containing an HTML page, uses the same techniques as described above in find to find the feeds associated with that page. If you know the URI of the page, you should provide it in $base_uri, so that relative links can be properly made absolute. Feed::Find will attempt to determine the correct base URI, but unless that URI is specified in the HTML itself (in a "<meta>" tag), you'll need to supply it yourself. Returns a list of feed URIs. LICENSE
Feed::Find is free software; you may redistribute it and/or modify it under the same terms as Perl itself. AUTHOR &; COPYRIGHT Except where otherwise noted, Feed::Find is Copyright 2004 Benjamin Trott, ben+cpan@stupidfool.org. All rights reserved. perl v5.10.1 2011-01-28 Feed::Find(3pm)
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