[Xymon] Strange issue when using local scripts (in linux)

Jeremy Laidman jeremy at laidman.org
Thu Aug 6 01:17:24 CEST 2020 

Dave

Good to hear it worked. Thanks for reporting back.

Cheers
Jeremy


On Thu, 6 Aug 2020 at 08:17, David Boyer <davieb at gmail.com> wrote:

> Jeremy,
>             I forgot to get back to you on this.   SUCCESS !!!   Changed
> the LC_ALL and it is working as expected now...
> Thanks very very much... I owe ya!
>
> Dave
>
> On Mon, Aug 3, 2020 at 11:25 PM Jeremy Laidman <jeremy at laidman.org> wrote:
>
>> David
>>
>> I think the problem is that xymonclient.sh sets LC_ALL=C, which
>> essentially overrides the value of LANG. For example:
>>
>> $ *LANG=en_US.UTF-8 rpm -q dhcp-common --qf "%{INSTALLTIME:date}\n"*
>> Tue 21 Apr 2020 01:14:57 PM AEST
>>
>> $ *LANG=en_US.UTF-8 LC_ALL=C rpm -q dhcp-common --qf
>> "%{INSTALLTIME:date}\n"*
>> Tue Apr 21 13:14:57 2020
>>
>> $ *LC_ALL=en_US.UTF-8 LANG=C rpm -q dhcp-common --qf
>> "%{INSTALLTIME:date}\n"*
>> Tue 21 Apr 2020 01:14:57 PM AEST
>>
>> So, your script should only need to set LC_ALL=en_US.UTF-8, and it should
>> work.
>>
>> But it seems like the world is trying to conspire against you changing
>> LANG/LC_ALL/LC_MESSAGES to anything but C, and I'd be inclined to go with
>> the flow, and assume that format; but also, set LC_ALL to C just in case.
>>
>> J
>>
>>
>> On Tue, 4 Aug 2020 at 12:44, David Boyer <davieb at gmail.com> wrote:
>>
>>> Jeremy,
>>>             So I thought about changing the output..  I compressed the
>>> spaces and then I put a _ in lieu of the spaces.
>>>
>>> As you can see below, they both get mangled...
>>>
>>> [davieb at xymonsvr ~]$ ~xymon/client/local/dateinfo
>>> dhcp-common,4.3.6,18_Jul_2020,en_US.UTF-8
>>> [davieb at xymonsvr ~]$ ~xymon/server/bin/xymon localhost "clientlog
>>> xymonsvr section=local:dateinfo"
>>> [local:dateinfo]
>>> dhcp-common,4.3.6,Jul_18_17:44:26,en_US.UTF-8
>>>
>>> [davieb at xymonsvr ~]$ ~xymon/client/local/dateinfo
>>> dhcp-common,4.3.6,18Jul2020,en_US.UTF-8
>>> [davieb at xymonsvr ~]$ ~xymon/server/bin/xymon localhost "clientlog
>>> xymonsvr section=local:dateinfo"
>>> [local:dateinfo]
>>> dhcp-common,4.3.6,Jul1817:44:26,en_US.UTF-8
>>>
>>>
>>>
>>> On Mon, Aug 3, 2020 at 10:25 PM David Boyer <davieb at gmail.com> wrote:
>>>
>>>> Jeremy,
>>>>            You read my mind!  But, it didn't seem to help... :(
>>>>
>>>> [davieb at xymonsvr ~]$ ~xymon/client/local/dateinfo
>>>> dhcp-common,4.3.6,18 Jul 2020,en_US.UTF-8
>>>>
>>>> [davieb at xymonsvr ~]$ ~xymon/server/bin/xymon localhost "clientlog
>>>> xymonsvr section=local:dateinfo"
>>>> [local:dateinfo]
>>>> dhcp-common,4.3.6,Jul 18 17:44:26,en_US.UTF-8
>>>>
>>>> [davieb at xymonsvr ~]$ cat ~xymon/client/local/dateinfo
>>>> #!/bin/sh
>>>>
>>>> OS=`uname -s`
>>>> RPM=dhcp-common
>>>> LANG=en_US.UTF-8;export LANG
>>>>
>>>> if [ ${OS} = "Linux" ]; then
>>>>    VERSION=`rpm -q ${RPM} --qf "%{VERSION}\n"`
>>>>    INSTALLED=`rpm -q ${RPM} --qf "%{INSTALLTIME:date}\n"|awk {'print
>>>> $2" "$3" "$4'}`
>>>> fi
>>>>
>>>> echo "${RPM},${VERSION},${INSTALLED},${LANG}"
>>>>
>>>> Good thing I'm grey already... This is the kinda stuff that would turn
>>>> me grey!
>>>>
>>>> Dave
>>>>
>>>>
>>>> On Mon, Aug 3, 2020 at 9:21 PM Jeremy Laidman <jeremy at laidman.org>
>>>> wrote:
>>>>
>>>>> Great to see that the problem has been identified.
>>>>>
>>>>> I would recommend forcing LANG in your script to a known value,
>>>>> because that's the code that makes an assumption about the output of rpm.
>>>>>
>>>>> J
>>>>>
>>>>> On Tue, 4 Aug 2020 at 10:56, David Boyer <davieb at gmail.com> wrote:
>>>>>
>>>>>> Jeremy,
>>>>>>        If you notice, both iterations are being run from the
>>>>>> xymonsvr.  I've added the LANG to see if the
>>>>>> two report it differently.
>>>>>>
>>>>>> So, by hand it looks:
>>>>>>
>>>>>> [davieb at xymonsvr ~]$ ~xymon/client/local/dateinfo
>>>>>> dhcp-common,4.3.6,18 Jul 2020,en_US.UTF-8
>>>>>>
>>>>>> Pulling the info out of xymon looks:
>>>>>>
>>>>>> [davieb at xymonsvr ~]$ ~xymon/server/bin/xymon localhost "clientlog
>>>>>> xymonsvr section=local:dateinfo"
>>>>>> [local:dateinfo]
>>>>>> dhcp-common,4.3.6,Jul 18 17:44:26,*C*
>>>>>>
>>>>>> Humm, there does appear to be a difference!  Checking the xymon user
>>>>>> itself, it UTF-8.
>>>>>> [xymon at xymonsvr ~]$ echo $LANG
>>>>>> en_US.UTF-8
>>>>>>
>>>>>>
>>>>>> That appears to be the issue though, I set the LANG=C and ran the
>>>>>> script by hand and get the same results when I pull it from xymon!
>>>>>> [davieb at xymonsvr ~]$ LANG=C;export LANG
>>>>>> [davieb at xymonsvr ~]$ ~xymon/client/local/dateinfo
>>>>>> dhcp-common,4.3.6,Jul 18 17:44:26,C
>>>>>>
>>>>>> Looking at the xymon.sh start script, it does not appear to set it
>>>>>> anywhere!  Guess I'll need to run that
>>>>>> to ground in the morning.
>>>>>>
>>>>>> Thanks for pointing me in the right direction!
>>>>>>
>>>>>> Dave
>>>>>>
>>>>>> On Mon, Aug 3, 2020 at 8:11 PM Jeremy Laidman <jeremy at laidman.org>
>>>>>> wrote:
>>>>>>
>>>>>>> David
>>>>>>>
>>>>>>> Update your script to, display the value of the LANG variable in
>>>>>>> addition to the RPM details (perhaps on a separate line), and see if the
>>>>>>> value differs between the script output (run from your shell) and the
>>>>>>> clientlog.
>>>>>>>
>>>>>>> I suspect LANG is set in your shell differently from how it's set in
>>>>>>> the xymon user's shell. RPM (or probably glibc) uses LANG to format the
>>>>>>> date according to the environment's locale. I'm guessing your shell has
>>>>>>> LANG set to something like en_US, whereas the xymon user's LANG is set to
>>>>>>> something like C, or is not set at all.
>>>>>>>
>>>>>>> Cheers
>>>>>>> Jeremy
>>>>>>>
>>>>>>> On Tue, 4 Aug 2020 at 08:32, David Boyer <davieb at gmail.com> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>     I've got a strange date issue.  I've written some local scripts
>>>>>>>> to pad information onto the combo message. Here is the background:
>>>>>>>>
>>>>>>>> 1. When you run the script by hand locally (take note of the date):
>>>>>>>>
>>>>>>>> [davieb at xymonsvr ~]$ ~xymon/client/local/dateinfo
>>>>>>>> dhcp-common,4.3.6,18 Jul 2020
>>>>>>>>
>>>>>>>> 2. When I pull the information from xymon server:
>>>>>>>>
>>>>>>>> [davieb at xymonsvr ~]$ ~xymon/server/bin/xymon localhost "clientlog
>>>>>>>> xymonsvr section=local:dateinfo"
>>>>>>>> [local:dateinfo]
>>>>>>>> dhcp-common,4.3.6,Jul 18 17:44:26
>>>>>>>>
>>>>>>>>
>>>>>>>> Notice how the date field gets modified?  I can't figure out why.
>>>>>>>> The only thing I can think of is something within the xymon code, but I
>>>>>>>> don't know why it would?
>>>>>>>>
>>>>>>>> Here's the simple script:
>>>>>>>>
>>>>>>>> [davieb at xymonsvr ~]$ cat ~xymon/client/local/dateinfo
>>>>>>>> #!/bin/sh
>>>>>>>>
>>>>>>>> OS=`uname -s`
>>>>>>>> RPM=dhcp-common
>>>>>>>>
>>>>>>>> if [ ${OS} = "Linux" ]; then
>>>>>>>>    VERSION=`rpm -q ${RPM} --qf "%{VERSION}\n"`
>>>>>>>>    INSTALLED=`rpm -q ${RPM} --qf "%{INSTALLTIME:date}\n"|awk
>>>>>>>> {'print $2" "$3" "$4'}`
>>>>>>>> fi
>>>>>>>>
>>>>>>>> echo "${RPM},${VERSION},${INSTALLED}"
>>>>>>>>
>>>>>>>> Does anybody have any idea what is going on?
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>> Dave
>>>>>>>> _______________________________________________
>>>>>>>> Xymon mailing list
>>>>>>>> Xymon at xymon.com
>>>>>>>> http://lists.xymon.com/mailman/listinfo/xymon
>>>>>>>>
>>>>>>>
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