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Re: Watching a directory, was Re: how would you do this?

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On Thu 19 Aug 2021 at 08:01:24 (-0400), songbird wrote:
> David Wright wrote:
> > On Wed 18 Aug 2021 at 20:55:12 (-0400), songbird wrote:
> >>   let's suppose you have a directory where there are
> >> various scripts, libraries, programs, data, etc.
> >> 
> >>   you want to know exactly which other scripts, libraries,
> >> etc. use them and to log each caller to know the name so
> >> it can be tracked down (location would be nice too, but 
> >> that could be found later if needed).
> >> 
> >>   i don't need to keep the information in a database as
> >> just having the log file will be enough.
> >> 
> >>   how would you do this?
> >> 
> >>   this isn't a homework assignment i'm just curious how
> >> easy or hard this would be to accomplish.
> >
> > Easy.
> >
> > $ inotifywait -m -e access --timefmt "%F %T" --format "%T %f" the-directory/
> >
> > To try it, just type in that line, using a sensible directory name.
> > (The package name to install first is inotify-tools.)
> >
> > Change the formats to taste. Pipe into a   while IFS=$'\n' read Filename ; do
> > loop if you want to do something with the output. See:
> >
> >   https://lists.debian.org/debian-user/2021/03/msg01494.html
> >
> > for a real script (waiting on close-writeable-file, rather than just
> > access) that I use a lot for stealing files from FireFox's cache
> > (~/.cache/mozilla/firefox/foo.bar.profile/cache2/entries/).
> 
>   thanks!  very interesting!  :)
> 
>   thank you to others who replied also.  :)
> 
>   i was wondering if there was a general tool available as on
> debian-devel they are talking about usr-merge and if there was a
> simple way to find out who's using /bin and such instead of 
> /usr/bin,

No, that's a different problem. My solution addresses a directory,
hence the change in Subject line. You'd have to dive deeper into
inotify and inotify_add_watch, to see whether you can specify the
inode of the /bin symlink separately from that for /usr/bin.

$ ls -Glidg /bin /usr/bin
    12 lrwxrwxrwx 1     7 Apr  3  2020 /bin -> usr/bin
261634 drwxr-xr-x 2 69632 Aug 11 19:10 /usr/bin
$ 

> but also the idea of being able to set up a honeypot
> on your own system and see if any programs or processes you 
> haven't done yourself are accessing it.  might give you a
> warning of being hacked, but of course there are other things
> going on in a system which you expect to access things so it
> is an interesting way to find out what is happening...
> 
>   after many years and a lot of different things being set up
> i think it is a good idea to keep an eye on what is happening.
> especially with how things are going these days.

Cheers,
David.

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Thread

how would you do this? songbird <songbird@anthive.com> - 2021-08-19 03:00 +0200
  Re: how would you do this? Cindy Sue Causey <butterflybytes@gmail.com> - 2021-08-19 03:30 +0200
    Re: how would you do this? songbird <songbird@anthive.com> - 2021-08-19 14:40 +0200
  Re: how would you do this? Roberto C. Sánchez <roberto@debian.org> - 2021-08-19 03:30 +0200
    Re: how would you do this? songbird <songbird@anthive.com> - 2021-08-19 14:40 +0200
  Re: how would you do this? Jeremy Ardley <jeremy@ardley.org> - 2021-08-19 03:40 +0200
    Re: how would you do this? songbird <songbird@anthive.com> - 2021-08-19 14:50 +0200
  Watching a directory, was Re: how would you do this? David Wright <deblis@lionunicorn.co.uk> - 2021-08-19 04:40 +0200
    Re: Watching a directory, was Re: how would you do this? songbird <songbird@anthive.com> - 2021-08-19 14:30 +0200
      Re: Watching a directory, was Re: how would you do this? David Wright <deblis@lionunicorn.co.uk> - 2021-08-20 05:50 +0200
        Re: Watching a directory, was Re: how would you do this? didar <nosferatu@purlo.in> - 2021-08-21 15:50 +0200
          Re: Watching a directory, was Re: how would you do this? David Wright <deblis@lionunicorn.co.uk> - 2021-08-22 06:40 +0200

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