Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery
 
PerlMonks  

Re: I can afford to spend so much time at the Monastery because:

by pileofrogs (Priest)
on Feb 09, 2009 at 22:28 UTC ( #742604=note: print w/replies, xml ) Need Help??


in reply to I can afford to spend so much time at the Monastery because:

I can afford to spend so much time at the Monastery because:

One word: Union

  • Comment on Re: I can afford to spend so much time at the Monastery because:

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://742604]
help
Chatterbox?
[davido]: or on ubuntu /var/run/utmp
[Corion]: Otherwise, I would imagine that a user with a process still alive would lock that information in memory.
[davido]: so last -f /var/run/utmp on ubuntu provides similar (though more verbose) info
[oiskuu]: glibc getlogin just does ttyname() and falls back on getutline(); it's not security related at all. (reminds me of sendmail and remote finger services of the naive early spam era)
[Corion]: But yes, "who started this process" is interesting information :)
[tye]: no, I really believe that "login user" was added as a fundamental bit of info about each process in order to enhance the usefulness of auditing
[Corion]: Ah - if that information is saved in a file, then you could theoretically spam that file and confuse getlogin(). So, don't use it for authentication :)
[tye]: that is what getlogin() certainly *used* to do. I don't believe that is what it certainly should do.
[davido]: /var/run/utmp is 664 i think.
[tye]: Note that my "man getlogin" says that it uses stdin when it should use /dev/tty (calling a glibc bug). But that does not appear to be the case when I test it. But maybe Perl's getlogin() is not using glibc's getlogin().

How do I use this? | Other CB clients
Other Users?
Others perusing the Monastery: (9)
As of 2017-06-23 19:42 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    How many monitors do you use while coding?















    Results (554 votes). Check out past polls.