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POWatching a file for changes in Linux
 

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    <h1>Question:</h1> <p>Is there any way to track the progress of a file in Linux (ie. new file/save file)?</p> <h1>Details:</h1> <p>I am aware of <a href="http://en.wikipedia.org/wiki/Inotify" rel="nofollow">inotify</a> which can be used to track entire folders for file creation, deletion, and modification. However, those are very low level. Text editors often when saving a file, write the modified buffer a temporary location, then move it and overwrite the original file. This would be seen by inotify as a <code>CREATE</code> and a <code>MOVE</code> when what I want is a <code>MODIFY</code>.</p> <p>It seems counter intuitive to me that every time a file is saved it would be interpreted as a new file. Is there any identifying value of a file I can use to distinguish between creating a fresh new file and saving an existing file? Another way to ask this question is: "How do programs such as <a href="http://en.wikipedia.org/wiki/Beagle_%28software%29" rel="nofollow">Beagle</a>, <a href="http://en.wikipedia.org/wiki/Spotlight_%28software%29" rel="nofollow">Spotlight</a>, <a href="http://en.wikipedia.org/wiki/Windows_Search" rel="nofollow">Windows Search</a>, and <a href="http://en.wikipedia.org/wiki/Google_Desktop" rel="nofollow">Google Desktop</a> get around this problem"?</p> <h1>Goal:</h1> <p>Here is a good way to describe what I want: Using <code>Vim</code>, if I open a file and save it (<code>:w</code>), that file will get written to a temporary file and then moved over to the original file, tricking <code>inotify</code> into believing that a completely new file was created and then used to overwrite the original file. However, if add a file to subversion (<code>svn</code>), then open that file with <code>Vim</code> and save it (<code>:w</code>), <code>svn</code> will know that the saved file is actually a modified file and not a new one. How does <code>svn</code> know this?</p>
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