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Top Forums Shell Programming and Scripting changing a file when the inode modified time of the other file changes Post 302500937 by zaxxon on Wednesday 2nd of March 2011 04:21:29 AM
Old 03-02-2011
It sounds valid. If a check with an interval of not less than every minute is okay for you, you could just trigger that script by cron. If you write a little shell script demon, don't forget to put at least a sleep 1 in it so that it does not bring your box to 100% CPU usage.
Instead of checking mtime you could also use cksum to see if something has been changed.
 

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DIRECTORYITERATOR.GETCTIME(3)						 1					     DIRECTORYITERATOR.GETCTIME(3)

DirectoryIterator::getCTime - Get inode change time of the current DirectoryIterator item

SYNOPSIS
public int DirectoryIterator::getCTime (void ) DESCRIPTION
Get the inode change time for the current DirectoryIterator item. PARAMETERS
This function has no parameters. RETURN VALUES
Returns the last change time of the file, as a Unix timestamp. EXAMPLES
Example #1 DirectoryIterator.getCTime(3) example This example displays the file name and last change time of the files in the directory containing the script. <?php $iterator = new DirectoryIterator(dirname(__FILE__)); foreach ($iterator as $fileinfo) { if ($fileinfo->isFile()) { echo $fileinfo->getFilename() . " changed at " . $fileinfo->getCTime() . " "; } } ?> The above example will output something similar to: apple.jpg changed at 1240398312 banana.jpg changed at 1238605440 index.php changed at 1240398935 pear.jpg changed at 1237423740 SEE ALSO
DirectoryIterator::getATime, DirectoryIterator::getMTime, filectime(3). PHP Documentation Group DIRECTORYITERATOR.GETCTIME(3)
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