[Open-scap] OpenSCAP Error, Missing Library?

Anthony Davis Anthony.Davis at bbc.co.uk
Tue Apr 23 16:29:44 UTC 2013

Hi Przemek,

Thanks for the reply. if nothing else I have learned a bit about strace :)

So I have followed what you have said and now have the below...

Process hangs:

[pid  3240]      0.000356 wait4(3261, 0x7fff4c86fa3c, WNOHANG, NULL) = 0
[pid  3240]      0.000265 select(7, [6], NULL, NULL, NULL


[root at server ~]# ls -l /proc/3240/fd/6
lrwx------ 1 root root 64 Apr 23 17:22 /proc/3240/fd/6 -> socket:[26058]

So i guess that shows the inode number? But what can I do with that info to furthure debug the problem?

Kind Regards


From: Przemek Klosowski [przemek.klosowski at nist.gov]
Sent: 22 April 2013 16:40
To: Anthony Davis
Subject: Re: [Open-scap] OpenSCAP Error, Missing Library?

On 04/22/2013 07:50 AM, Anthony Davis wrote:
> Hi,
> Sorry for the delay. So the output below is using  strace -r -f -p `pidof oscap tog rab the strace info, I have copied and pasted, from where the process starts and where it hangs, but that is all the information it gives me:
> So process 3218 is checking the rule before and this seems to work fine, it just hits the next rule and hangs...

I don't see that from the data---it looks as if there's a constant
progress, with system calls being issued every few miliseconds. Where
exactly do you see the hang? is it after the following:

[pid  3088]      0.000066 wait4(3109, 0x7fff68c44ffc, WNOHANG, NULL) = 0
[pid  3088]      0.000046 select(7, [6], NULL, NULL, NULL

THat would make certain sense---it blocks on read() from file descriptor
6 which it didn't read before.. can you check what is fd 6, e.g. by
doing 'ls -l /proc/3088/fd/6' (substitute 3088 with whatever PID is
doing the select call that blocks, and check that 6 corresponds to the
fd in []).

Is that strace sleuthing understandable to you, or all sound like black
arts? I am confident that you can get to the bottom of this by checking
things out this way, but I assume some familiarity with the low level
Linux details, which you may not share---I am glad to help anyway but I
don't want to lead you into frustration, so if you're not comfortable
doing all this just let me know.



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