[rrd-users] rrdtool - 1.4.4 with wrong LANG environment

[Martin Sperl]

Sorry - I have been on vacation.

No, I have not tried it yet and I would not want to mess around with a 
trunk build on a production system.
But at least i now know what is the issue and can work arround it.

It may be helpful to other people as well, who experience this...

Ciao,
         Martin

On 13.06.2011 11:46, Tobias Oetiker wrote:
> Hi Martin,
>
> have you tried the latest stable branch snapshot, I seem to
> remember that some issues were fixed in this area ...
>
> cheers
> tobi
>
> Friday Martin Sperl wrote:
>
>> Hi!
>>
>> I have observed a strange Segmentation fault that may not be 100% the
>> responsibility of rrdtool, but which may show up with other
>> installations as well, so I thought it worth asking...
>>
>> Here the basic Steps:
>>     -bash-3.2$ cat /etc/redhat-release
>>     Red Hat Enterprise Linux Server release 5.3 (Tikanga)
>>     -bash-3.2$ uname -a
>>     Linux localhost.localdomain 2.6.18-128.el5 #1 SMP Wed Dec 17 11:41:38
>> EST 2008 x86_64 x86_64 x86_64 GNU/Linux
>>     -bash-3.2$ export LANG=en_US
>>     -bash-3.2$ echo $LANG
>>     en_US
>>     -bash-3.2$ rrdtool graph test.png -a PNG -s -7days -e now -w 1000 -h
>> 500 --alt-autoscale
>> DEF:data=/tmp/webcheck.rrd:md5_f608ff0b37a67c5:AVERAGE
>> LINE1:data#00FF00:data -r -l 0 -u 2
>>     Segmentation fault
>>     -bash-3.2$ export LANG=en_us
>>     -bash-3.2$ rrdtool graph test.png -a PNG -s -7days -e now -w 1000 -h
>> 500 --alt-autoscale
>> DEF:data=/tmp/webcheck.rrd:md5_f608ff0b37a67c5:AVERAGE
>> LINE1:data#00FF00:data -r -l 0 -u 2
>>     ERROR: opening '/tmp/webcheck.rrd': No such file or directory
>>     -bash-3.2$
>>
>> So you see that it is totally dependent on the LANG environment
>> variable! Also it happens prior to parsing or any other checks of the
>> arguments...
>>
>> The stacktrace for this is:
>> Core was generated by `rrdtool graph test.png -a PNG -s -7days -e now -w
>> 1000 -h 500 --alt-autoscale D'.
>> Program terminated with signal 11, Segmentation fault.
>> [New process 13121]
>> #0  0x00002ac7380078c1 in gconv () from /usr/lib64/gconv/ISO8859-1.so
>> (gdb) bt
>> #0  0x00002ac7380078c1 in gconv () from /usr/lib64/gconv/ISO8859-1.so
>> #1  0x00000035ae01ea6b in __gconv () from /lib64/libc.so.6
>> #2  0x00000035ae01e08f in iconv () from /lib64/libc.so.6
>> #3  0x00000035b0018b59 in g_convert_with_iconv () from
>> /lib64/libglib-2.0.so.0
>> #4  0x00000035b0018eff in g_convert () from /lib64/libglib-2.0.so.0
>> #5  0x00000035b0019341 in g_locale_to_utf8 () from /lib64/libglib-2.0.so.0
>> #6  0x0000003132826c56 in gfx_prep_text (im=Could not find the frame
>> base for "gfx_prep_text".
>> ) at rrd_gfx.c:176
>> #7  0x0000003132826d6e in gfx_get_text_width (im=Could not find the
>> frame base for "gfx_get_text_width".
>> ) at rrd_gfx.c:201
>> #8  0x000000313281fd83 in rrd_parse_PVHLAST (line=Could not find the
>> frame base for "rrd_parse_PVHLAST".
>> ) at rrd_graph_helper.c:545
>> #9  0x000000313282237a in rrd_graph_script (argc=Could not find the
>> frame base for "rrd_graph_script".
>> ) at rrd_graph_helper.c:1117
>> #10 0x000000313281ab6d in rrd_graph_v (argc=Could not find the frame
>> base for "rrd_graph_v".
>> ) at rrd_graph.c:3950
>> #11 0x000000313281a57b in rrd_graph (argc=Could not find the frame base
>> for "rrd_graph".
>> ) at rrd_graph.c:3842
>> #12 0x000000000040434e in HandleInputLine (argc=21, argv=0x7fff7609a9b8,
>> out=0x35ae350860) at rrd_tool.c:792
>> #13 0x000000000040295d in main (argc=21, argv=0x7fff7609a9b8) at
>> rrd_tool.c:513
>>
>> Has anyone got a reasonable explanation for this observed effect - I
>> know it may be primarily Linux related...
>>
>> Thanks,
>>                   Martin
>>
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