Dear Rogier and Robert,
On Oct 03 2013, Rogier Wolff wrote:
> and it shows in the strace:
> getgid32() = 0
> setgid32(0) = 0
> getuid32() = 0
> setuid32(0) = 0
> geteuid32() = 0
> getuid32() = 0
> getegid32() = 0
> getgid32() = 0
>
> which works as designed....
Yes, knowing what the code was supposed to do. :)
>
> And then the code does:
>
> /* reset the random seed */
> srand (getpid());
>
> time(NULL) = 1380776131
>
> which should show up as a call to getpid, and not to "time".
> srand (time (NULL));
>
> is a very common call to initialize the random generator, but arguably
> the getpid is better for mtr than the time variant.
It is a common method, indeed. I don't know how/why mtr uses a pseudo-random
generator, though, without having read the code (will read that later, if I
still have sufficient interest).
> If that works, it's a bug that has been fixed in the main codebase:
> either work around it by supplying a hostname, or upgrade if you want.
Yes, passing an argument works fine. Perhaps we need the newest version of
mtr packaged in Debian...
> (I personally think the default of "localhost" is untidy: cleanlyness
> would require mtr to say: "no host to trace provided. Bye!" (or just
> exit wihtout doing anything as it does in your case). However that
> means that starting mtr from a menu in a gui without arguments would
> make it close immediately.)
I don't really think that it is *that* unclean of a solution. OTOH, just
quitting without any message violates the spirit of Unix of being noisy when
errors occur, while being silent when everything is fine.
If mtr issued a message that I missed an argument, then I would not have
sent this bugreport in the first place. :)
Oh, I have a feature request: can you put a button to toggle the name
resolution in the GUI. :) This way, if name resolution is getting in the
way, then we can turn it off (or on) very easily.
Thanks a lot for mtr,
--
Rogério Brito : rbrito@{ime.usp.br,gmail.com} : GPG key 4096R/BCFCAAAA
http://cynic.cc/blog/ : github.com/rbrito : profiles.google.com/rbrito
DebianQA: http://qa.debian.org/developer.php?login=rbrito%40ime.usp.br
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