how to detect a user who changed a particular file in Linux.
Hi all, (Note : I'm writing this mail to this kernel group as I did not find any suitable mechanism in application level for my below need). If a file modified by some user then how can we detect that user who modified it. Linux audit was not suitable for my need. Can this be achieved through kernel driver/module. Any other suggestions/help would be welcome. Thanks in advance. Regards, Ravikumar.
On Mon, May 16, 2011 at 3:02 PM, V.Ravikumar <ravikumar.vallabhu@gmail.com>wrote:
If a file modified by some user then how can we detect that user who modified it.
SystemTap can help you. Have a look at following examples:- http://sourceware.org/systemtap/wiki/WSFileMonitor http://sourceware.org/systemtap/wiki/WSFileMonitor2 -- Regards, Neependra www.neependra.net
On Mon, May 16, 2011 at 03:02:10PM +0530, V.Ravikumar wrote:
Hi all,
(Note : I'm writing this mail to this kernel group as I did not find any suitable mechanism in application level for my below need).
If a file modified by some user then how can we detect that user who modified it.
Linux audit was not suitable for my need.
Why not? It should have showed you this exactly.
On Mon, May 16, 2011 at 7:45 PM, Greg KH <greg@kroah.com> wrote:
On Mon, May 16, 2011 at 03:02:10PM +0530, V.Ravikumar wrote:
Hi all,
(Note : I'm writing this mail to this kernel group as I did not find any suitable mechanism in application level for my below need).
If a file modified by some user then how can we detect that user who
modified
it.
Linux audit was not suitable for my need.
Why not? It should have showed you this exactly.
For my need, I have to asynchronously notify if a given file was modified by some user using some program. As per my understanding for audit , one has to update system specific audit configuration files(say using some auditd related command line tools) with given file and it is not suitable for my requirement. Is there any other ways apart from using SystemTap and auditd command line tools. Thanks for all your suggestions so far. Regards, Ravikumar
On Tue, May 17, 2011 at 11:31 AM, V.Ravikumar <ravikumar.vallabhu@gmail.com> wrote:
On Mon, May 16, 2011 at 7:45 PM, Greg KH <greg@kroah.com> wrote:
On Mon, May 16, 2011 at 03:02:10PM +0530, V.Ravikumar wrote:
Hi all,
(Note : I'm writing this mail to this kernel group as I did not find any suitable mechanism in application level for my below need).
If a file modified by some user then how can we detect that user who modified it.
Linux audit was not suitable for my need.
Why not? It should have showed you this exactly.
For my need, I have to asynchronously notify if a given file was modified by some user using some program.
As per my understanding for audit , one has to update system specific audit configuration files(say using some auditd related command line tools) with given file and it is not suitable for my requirement.
Is there any other ways apart from using SystemTap and auditd command line tools.
Thanks for all your suggestions so far.
Have you considered using KProbes or tracepoints ? For KProbes you do write some kernel module to monitor the function you want. You have to be carefull not to try to monitor inlined functions. You could try to combine the use of KProbes with KThreads or usermode-helper process. It is just a thought.
Regards, Ravikumar
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participants (4)
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Greg KH -
Neependra Khare -
Nuno Martins -
V.Ravikumar