[LARTC] Getting "ip" command to work

[David Zoll dzoll@nyscul.org]

<PRE>bert hubert wrote:
&gt;<i> 
</I>&gt;<i> On Thu, Oct 26, 2000 at 05:03:01PM -0400, David Zoll wrote:
</I>&gt;<i> 
</I>&gt;<i> &gt; I'm running a Debian 2.2 system with the iproute package installed.  I
</I>&gt;<i> &gt; first tried with the included kernel, but it wouldn't work, so I rolled
</I>&gt;<i> &gt; my own (version 2.2.17) to see if that would let me use the command.  I
</I>&gt;<i> &gt; think I've turned everything required on:
</I>&gt;<i> 
</I>&gt;<i> Did the included version give the exact same error?
</I>
I believe it did.

 
&gt;<i> This is very weird. Can you verify with 'uname -a' that you are running the
</I>&gt;<i> kernel you think you are running?
</I>
Yes I am.

 
&gt;<i> Attached is the output of 'strace /sbin/ip link list', which you can verify
</I>&gt;<i> with yours to see what is happening differently.
</I>[snip]
&gt;<i> 
</I>&gt;<i> execve(&quot;/sbin/ip&quot;, [&quot;/sbin/ip&quot;, &quot;link&quot;, &quot;list&quot;], [/* 30 vars */]) = 0
</I>
This line is &quot;execve(&quot;/sbin/ip&quot;, [&quot;/sbin/ip&quot;, &quot;link&quot;, &quot;list&quot;, &quot;3&quot;], [/*
20 vars */]) = 0&quot; for me.  I used the exact same syntax to run it.

The bulk of the rest is similar enough until the sendto line.  I get
handle number 3 rather than 4, sizes are different, and the contents of
buffers have minor differences.  It appears to bind to the socket it
eventually chokes on just fine.

&gt;<i> sendto(4, &quot;\24\0\0\0\22\0\1\3]\236\3709\0\0\0\0\21\0\0\0&quot;, 20, 0, {sin_family¯_NETLINK, {sa_family\x16, sa_data=&quot;\0\0\0\0\0\0\0\0\0\0\24\0\0\0&quot;}, 12) = 20
</I>
Here I get &quot;sendto(3,
&quot;\24\0\0\0\22\0\1\3\205\241\3709\0\0\0\0\21\0\0\0&quot;, 20, 0,
{sin_family¯_NETLINK, {sa_family\x16, sa_data=&quot;\0\0\0\0\0\0\0\0\0\0\2
4\0\0\0&quot;}, 12) = -1 ECONNREFUSED (Connection refused)&quot;

&gt;<i>From this point, it writes the error message and exits rather than
</I>continuing on with brk(0).

-David Zoll


</PRE>