Re: Segmentation fault

I'm sorry, i did a mistake, each time I say client.py, you should read
client_intf.c

Sorry about that.

2009/7/9 François Dumont <[email protected]>

> Hi everybody,
>
> I'm using Ubuntu 8.04 (Hardy), up to date.
>
> I think that you should run your script with gdb:
>>
>> $ gdb python
>> gdb> set args yourscript.py
>> gdb> run
>> [it crashes]
>> gdb> bt full
>>
>> And post the result.
>>
>
> To be clear, here is the python script I used with gdb :
>
> import netsnmp
>>
>> qosType = "0"
>> profileNb = "17"
>> value = "rbQoSProfileType"
>>
>> oid = netsnmp.Varbind(value, profileNb, qosType)
>> result = netsnmp.snmpget(oid, DestHost = "10.0.0.1", Community="private",
>> Version = 2)
>> print ("%s")  %(result)
>>
>
> and here is what I did with gdb :
>
> mesh@sumac-clusterhead-1:~$ gdb python
>> GNU gdb 6.8-debian
>> Copyright (C) 2008 Free Software Foundation, Inc.
>> License GPLv3+: GNU GPL version 3 or later <
>> http://gnu.org/licenses/gpl.html>
>> This is free software: you are free to change and redistribute it.
>> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
>> and "show warranty" for details.
>> This GDB was configured as "i486-linux-gnu"...
>> (no debugging symbols found)
>> (gdb) set args test2.py
>> (gdb) run
>> Starting program: /usr/bin/python test2.py
>> (no debugging symbols found)
>> (no debugging symbols found)
>> (no debugging symbols found)
>> [Thread debugging using libthread_db enabled]
>> (no debugging symbols found)
>> (no debugging symbols found)
>> (no debugging symbols found)
>> (no debugging symbols found)
>> [New Thread 0xb7df18c0 (LWP 6839)]
>> (no debugging symbols found)
>> (no debugging symbols found)
>> (no debugging symbols found)
>> (no debugging symbols found)
>> (no debugging symbols found)
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> [Switching to Thread 0xb7df18c0 (LWP 6839)]
>> 0xb7e66403 in strchrnul () from /lib/tls/i686/cmov/libc.so.6
>> (gdb) bt full
>> #0  0xb7e66403 in strchrnul () from /lib/tls/i686/cmov/libc.so.6
>> No symbol table info available.
>> #1  0xb7e30259 in vfprintf () from /lib/tls/i686/cmov/libc.so.6
>> No symbol table info available.
>> #2  0xb7e54c04 in vsnprintf () from /lib/tls/i686/cmov/libc.so.6
>> No symbol table info available.
>> #3  0xb7e393a5 in snprintf () from /lib/tls/i686/cmov/libc.so.6
>> No symbol table info available.
>> #4  0xb7ce0d15 in ?? ()
>>    from /usr/lib/python2.5/site-packages/netsnmp/client_intf.so
>> No symbol table info available.
>> #5  0xb7ce3bc6 in ?? ()
>>    from /usr/lib/python2.5/site-packages/netsnmp/client_intf.so
>> No symbol table info available.
>> #6  0x080c9ab3 in PyEval_EvalFrameEx ()
>> No symbol table info available.
>> #7  0x080c96e5 in PyEval_EvalFrameEx ()
>> No symbol table info available.
>> #8  0x080cb1f7 in PyEval_EvalCodeEx ()
>> No symbol table info available.
>> #9  0x080c93fe in PyEval_EvalFrameEx ()
>> No symbol table info available.
>> #10 0x080cb1f7 in PyEval_EvalCodeEx ()
>> ---Type <return> to continue, or q <return> to quit---
>> No symbol table info available.
>> #11 0x080cb347 in PyEval_EvalCode ()
>> No symbol table info available.
>> #12 0x080ea818 in PyRun_FileExFlags ()
>> No symbol table info available.
>> #13 0x080eaab9 in PyRun_SimpleFileExFlags ()
>> No symbol table info available.
>> #14 0x08059335 in Py_Main ()
>> No symbol table info available.
>> #15 0x080587f2 in main ()
>> No symbol table info available.
>> (gdb)
>>
>
>
>
>
>> Which distribution are you using?  Adding debug package for libsnmp will
>> help if they  are available. Or maybe you use your  own libsnmp. In this
>> case, try to compile it  unstripped. I don't remember, but which version
>> do you use?
>>
>> Maybe you have the same bug as here:
>>  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=497656
>>
>
>
>     Have you tried applying the patch mentioned in that bug report?
>>     It's a one-line change to the file 'python/netsnmp/client_intf.c'
>>       (Though you would also need to recompile/install the python module)
>>
>>     Dave
>>
>
> I'm using the library libsnmp-python available in the depositories of
> Ubuntu. The version of this library is 5.4.1~dfsg-4ubuntu4.2 . I tried to
> see my client.py file but I didn't find it. However, it is in the sources of
> the net-snmp library available on the website of net-snmp
> http://www.net-snmp.org/download.html. I downloaded the lastest sources :
> https://sourceforge.net/projects/net-snmp/files/net-snmp/net-snmp-5.4.2.1.zip/download.
> In these sources, the client.py file is up-to-date compared to the bug
> report (the line 341 has been changed).
> So, I tried to compile these sources (./configure, then make). But I had a
> problem with the make, it told me it wasn't able to find the perl library.
> So I made a link between the library it was looking for and the library
> installed (libperl.so.5.8.8).
> After that I recompiled, ./configure and make, but I had another problem
> with the make. It's a little bit difficult for me to explain this problem,
> so I posted the result of the make (that I put in a file to be able to read
> it after) on pastebin.ca. Here it is : http://pastebin.ca/1489423
>
> I try to be as clear as I can, but maybe I'm not, so ask me if you don't
> understand.
>
> Thank you very much
>
>

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