On Wed, 2004-08-25 at 14:44, Kaustubh Ghosh wrote: > I am trying to make a time structure,linked to the directory structure . I > am trying to explain.For each file or directory there will be a time > structure associated which will store all dates of modification of the files > sequentially and will be accessible only by the root user. It is aimed at > better security.Let us consider a person is to submit a report within a > particular date.He doesnot,but when faced with inquiry,he just changes the > system time to a previous date and saves his report made later, at that > date.But this will be impossible with the time structure.A cursory glance at > the dates of modification is enough to reveal that the system time has been > changed.Can anyone give me any ideas how this can be achieved?I don't like to > bias with mine.Any suggestion is welcome.The file system under consideration > is ext2fs.Thanks in advance for any consideration. > Kaustubh Ghosh You want something like a source code control system where you can check out and check in files? I believe this tracks the date/time the file was checked in. RCS would do that. I am sure there are others out there that are newer than that. I think subversion maybe one of the newer packages for this. In most cases though you can not change the systems time without root access. If they have root access then all bets are off regardless of what system you put in place. As others already pointed out the user can use touch to change the timestamp to whatever they want. You could also just setup a separate system that the user must scp the file to. If it is not on that system then it has not be delivered. You keep the user from having shell access to that system so they can not change the time stamps. Sounds like more of process issue than anything else. -- Scot L. Harris <webid@xxxxxxxxxx>
