On Oct 23, 1:38 pm, Falcolas <garri...@gmail.com> wrote: > On Oct 23, 1:25 pm, Peng Yu <pengyu...@gmail.com> wrote: > > > > > As far as I know, linux doesn't support a system level way to figure > > out all the symbolic links point to a give file. I could do a system > > wide search to look for any symbolic link that point to the file that > > I am interested in. But this will be too slow when there are many > > files in the systems. > > > I'm thinking of writing a daemon program which will build a database > > on all the symbolic links that point to any files. Later on, whenever > > I change or remove any file or symbolic link, I'll will notify the > > daemon process the changes. By keeping this daemon process running, I > > can quickly figure out what symbolic links are pointing to any give > > file. > > > But I have never make a daemon program like this in python. Could > > somebody point me what packages I need in order to make a daemon > > process like this? Thank you! > > I would recommend looking into some articles on creating well behaved > daemons and review python recipes for creating daemonic processes. > From there, it's mostly a matter of writing code which is fairly self > reliant. The ability to write to the system logs (Python module > syslog) helps quite a bit. > > http://www.google.com/search?q=writing+daemonshttp://code.activestate.com/recipes/278731/ > > I typically write a program which will run from the command line well, > then add a switch to make it a daemon. That way, you have direct > control over it while writing the daemon, but can then daemonize it > (using the activestate recipe) without making changes to the code. > > Garrick
One other note - sorry for the double post - if you look at other programs which maintain a DB of files, such as unix' slocate program, update the DB as a daily cron job. You may want to also consider this route. Garrick -- http://mail.python.org/mailman/listinfo/python-list