Re: Segmentation fault

I confirm that with this script (there is nothing else in the script except
this) :

   import netsnmp
>
>    profileNb = "25"
>    qosType = "0"
>    value = "rbQoSProfileType"
>
>    oid = netsnmp.Varbind(value, profileNb, qosType)
>    result = netsnmp.snmpget(oid, DestHost = "10.0.0.1", Community =
> "private", Version = 2)
>    print("%s") %(result)


It gives the segmentation fault.

I'm sorry if I didn't gave you the entire script but just parts of it and I
apologize, I understand this can be waste of time for you.

So here is the script I used to notice that WALK doesn't crash :

import netsnmp
>
> profileNb = raw_input("Which QoS Profile to edit ?\n")
>
> print("-----------")
> print("QoS Profile")
> print("-----------\n")
>
> value = "rbQoSProfileName"
> oid = netsnmp.Varbind(value, profileNb)
> resultName = netsnmp.snmpget(oid, DestHost = "10.0.0.1", Community =
> "private", Version = 2)
> print("Name = %s") %resultName
>
> value = "rbQoSProfileType"
> oid = netsnmp.Varbind(value, profileNb)
> resultType = netsnmp.snmpwalk(oid, DestHost = "10.0.0.1", Community =
> "private", Version = 2)
> print("Type = %s") % (resultType, )
>
> value = "rbQoSProfileParam1"
> oid = netsnmp.Varbind(value, profileNb)
> resultParam1 = netsnmp.snmpget(oid, DestHost = "10.0.0.1", Community =
> "private", Version = 2)
> print("CIR = %s Kbps") %resultParam1
>
> value = "rbQoSProfileParam2"
> oid = netsnmp.Varbind(value, profileNb)
> resultParam2 = netsnmp.snmpget(oid, DestHost = "10.0.0.1", Community =
> "private", Version = 2)
> print("MIR = %s Kbps") %resultParam2
>
> value = "rbQoSProfileParamTime"
> oid = netsnmp.Varbind(value, profileNb)
> resultParamTime = netsnmp.snmpwalk(oid, DestHost = "10.0.0.1", Community =
> "private", Version = 2)
> print("CT = %s") % (resultParamTime, )
>
> value = "rbAQoSProfileRowStatus"
> oid = netsnmp.Varbind(value, profileNb)
> resultRowStatus = netsnmp.snmpwalk(oid, DestHost = "10.0.0.1", Community =
> "private", Version = 2)
> print("Status = %s") % (resultRowStatus, )


And the result in the shell :

mesh@sumac-clusterhead-1:~$ python test2.py
> Which QoS Profile to edit ?
> 25
> -----------
> QoS Profile
> -----------
>
> Name = tests
>    rbQoSProfileType 25 = None ( None )
> Type = ()
> CIR = 1100 Kbps
> MIR = 0 Kbps
>    rbQoSProfileParamTime 25 = None ( None )
> CT = ()
>    rbAQoSProfileRowStatus 25 = None ( None )
> Status = ()


But now, I understand that do a WALK after a GET is not a good adea. So
let's forget this.

Going back to the simple script at the very top of this mail, I found on
this page http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=497656<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=497656>the
same problem as mine. This is a bug reported for Debian, and I am
under
Ubuntu 8.04 completely updated. So there should be a way to solve this
problem.

Thank you

2009/7/8 Dave Shield <[email protected]>

> 2009/7/8 François Dumont <[email protected]>:
> > This is the initial GET that crashes.
>
> OK - it sounds as if a trivial script with *just* a single GET
> request should still crash.  Nothing else - no prompting,
> no SET requests, nothing.   Just something like:
>
>    import netsnmp
>
>    profileNb = "25"
>    qosType = "0"
>     value = "rbQoSProfileType"
>
>    oid = netsnmp.Varbind(value, profileNb, qosType)
>     result = netsnmp.snmpget(oid, DestHost = "10.0.0.1", Community =
> "private", Version = 2)
>    print("%s") %(result)
>
>
> Can you please confirm whether this is indeed the case.
> Does the above script (suitably tweaked to match your
> actual usage) crash or not?
>   It would probably be sensible if you posted the corrected version
> of the script as well, so I know *exactly* what you are working with.
>
>
>
> >                  In fact, I noticed that before, but I
> > used snmpwalk instead with the following line :
> >
> > print("Type = %s") %(result, )
>
> No - you are complicating things too much again.
> The next step after a GET request would be GETNEXT
> (not a full walk).
>
>
> > and it printed :
> >
> > rbQoSProfileType 25 = None ( None )
>
> I'm sorry - but it's impossible to offer sensible advice based on
> such fragmentary information.   Please can you always post
> the *FULL* text of the test scripts you are using, including all
> the information you provide, and the complete output.
> (both expected, and actual)
>
>   You say that you "used snmpwalk", but give no indication *how*
> you used it.   It's actually a waste of my time to have to keep
> guessing about the details that you don't mention.
>   (Sorry if that comes over a bit harshly, but it is very frustrating).
>
>
> > I am wondering why a GET crashes while a WALK doesn't
> > (but doesn't give the correct answer) ?
>
> Forget about the walk - there's no such request anyway.
> Concentrate on a single GET, and we can take it from there.
>
> Dave
>

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