Exclusively lock a file to prevent other processes from reading it?
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From: Chris Rebert on 4 May 2010 17:48 On Tue, May 4, 2010 at 2:37 PM, <python(a)bdurham.com> wrote: > Is there a way to exclusively lock a file to prevent other processes from > reading it while we have it open? > > I need to cache some overflow data to disk in a temp file and I want to make > sure no other processes can read the contents of this file while I'm using > it. > > I tried the following using an 'append binary' mode, but I can use NotePad > to read the file while I'm using it: > > fd = open( r'a-temp-file.dat', 'ab' ) > > My environment is Python 2.6.4 (32-bit) under Windows, but I'm looking for a > cross-platform solution if that's possible. I remember this recipe (or a variant) from the dead-tree Python Cookbook: http://code.activestate.com/recipes/65203-portalocker-cross-platform-posixnt-api-for-flock-s/ Cheers, Chris -- http://blog.rebertia.com |