Hi, Robert. Thanks for the speedy reply.
On Oct 02 2013, Robert Woodcock wrote:
> On 10/02/2013 06:27 PM, Rogério Brito wrote:
> >Also, I just tried installing mtr-tiny and I get the same results with
> >EPERM.
>
> Note that when you run "strace mtr", you are no longer running mtr
> as root, as
> Linux does not honor the setuid bit for ptrace'd processes.
Thanks for noting that. I didn't know it.
> Therefore it cannot
> open the raw socket it needs to create packets. From strace(1):
>
> -u username Run command with the user ID, group ID, and supple‐
> mentary groups of username. This option is only
> useful when running as root and enables the correct
> execution of setuid and/or setgid binaries. Unless
> this option is used setuid and setgid programs are
> executed without effective privileges.
>
> 'sudo strace mtr' would work around this.
I'm attaching (as compressed files) the output of running both
`sudo strace mtr` and `sudo strace mtr --curses`.
> You didn't say if you ran any tests other than strace with the
> mtr-tiny package,
Well, I tried to run it, of course. :) I got the same results (read:
"returning back to the prompt").
> but you would probably want to try running 'mtr --curses' to
> eliminate possible
> X misconfiguration problems. You may also want to check the $DISPLAY
> environment
> variable.
Read about the --curses test that I did with mtr (and trying to run mtr-tiny
both with and without strace).
I don't really believe that I have problems with X (the value of DISPLAY is
fine), as I can launch any other programs that I want, and, in fact, I
always use the command line for everything.
Is there anything else that I can do to rule out problems?
Thanks again for your speedy response,
--
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
sudo-strace-mtr--curses.log.xz
Description: Binary data
sudo-strace-mtr.log.xz
Description: Binary data
