Non obvious 127 plugin error

[Craig Stewart]

Giorgio,

It's bash.

[root at nms tmp]# ls -l /bin/sh
lrwxrwxrwx. 1 root root 4 May 31 11:39 /bin/sh -> bash
[root at nms tmp]#

I've been doing a bit of reading and it looks like the maximum arguments
is a kernel setting built at compile time.  I'm having a hard time
wrapping my head around how the check works when run directly and fails
when called by the Nagios process.

I'm starting to wonder if I should point the /bin/sh to something like
csh or some such as a test.

Craig
--
Craig Stewart
Systems Integration Analyst
Craig.Stewart at corp.xplornet.com Tel: (506) 328-1245 Cell: (506) 425-0111
Xplornet - Broadband, Everywhere

On 06/02/2011 10:43 AM, Giorgio Zarrelli wrote:
> Check wether your shell is a Dash or a Bash. That means, check where the
> /bin/sh symlink is pointing to.
> 
> Ciao,
> 
> Giorgio
> 
> Il giorno 02/giu/2011, alle ore 14:43, Craig Stewart
> <Craig.Stewart at corp.xplornet.com> ha scritto:
> 
>> All,
>>
>> SELinux was enabled (DOH!) and has been now disabled.  Didn't fix my
>> problem though.  Thanks for that Clint, I don't know HOW many times
>> SELinux has bitten me.  Should know by now.
>>
>> I ran the strace as suggested by Justin and saw THIS little tidbit
> flash by:
>>
>> 11769 execve("/bin/sh", ["sh", "-c", "/usr/lib/nagios/plugins/check_dig
>> -H 142.166.86.18 -l www.xplornet.com -a 142.166.86.46 -w 0.5 -c 1 -t
>> 5"], [/* 189 vars */]) = -1 E2BIG (Argument list too long)
>> 11751 --- {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=11769,
>> si_status=127, si_utime=0, si_stime=0} (Child exited) --
>>
>> Argument list too long????  So, SOMETHING (I suspect the shell) doesn't
>> like that many arguments passed.  Well, making progress.
>>
>> By the way, this is a bone stock OS install (Fedora 15 currently) and I
>> haven't tweaked anything.
>>
>> Cheers all!
>>
>> Craig
>> --
>> Craig Stewart
>> Systems Integration Analyst
>> Craig.Stewart at corp.xplornet.com
>> Xplornet - Broadband, Everywhere
>>
>> On 06/01/2011 05:36 PM, Clint Dilks wrote:
>>> Hi
>>>
>>> Just wondering if SE Linux is disabled on your system?  If not check
>>> your audit log and see if access to the plugin is being denied
>>>
>>> On Thu, Jun 2, 2011 at 8:15 AM, Justin T Pryzby <justinp at norchemlab.com
>>> <mailto:justinp at norchemlab.com>> wrote:
>>>
>>>    You can also strace the main nagios process:
>>>    strace -fs999 -e execve -p PID_OF_NAGIOS
>>>    or
>>>    sudo strace -fs999 -e execve -p `ps o pid h -C nagios3 --sort
>>>    start_time |sed q` 2>&1 |grep -Fw execve |grep -Fw check_dig
>>>
>>>    127 is the return status of the shell when a command isn't found:
>>>    justinp at justinp:~$ asdf; echo $?
>>>    bash: asdf: command not found
>>>    127
>>>
>>>    man sh => /EXIT STATUS/
>>>
>>>    Justin
>>>
>>>    On Wed, Jun 01, 2011 at 04:23:05PM -0300, Craig Stewart wrote:
>>>> Giorgio
>>>>
>>>> As apache user:
>>>>
>>>> bash-4.2$ /usr/lib/nagios/plugins/check_dig -H 72.45.111.250
>>>    <tel:72.45.111.250> -l
>>>> www.xplornet.com <http://www.xplornet.com> -a 142.166.86.46 -w 0.5
>>>    -c 1 -t 5
>>>> DNS OK - 0.096 seconds response time (www.xplornet.com
>>>    <http://www.xplornet.com>. 864 IN A
>>>> 142.166.86.46)|time=0.095553s;0.500000;1.000000;0.000000
>>>>
>>>>
>>>> You understand my confusion.
>>>>
>>>> Craig
>>>>
>>>> Craig Stewart
>>>> Systems Integration Analyst
>>>> Craig.Stewart at corp.xplornet.com
>>>    <mailto:Craig.Stewart at corpxplornet.com
> <mailto:Craig.Stewart at corp.xplornet.com>> Tel: (506) 328-1245
>>>    <tel:%28506%29%20328-1245> Cell: (506) 425-0111
>>>    <tel:%28506%29%20425-0111>
>>>> Xplornet - Broadband, Everywhere
>>>>
>>>> On 06/01/2011 04:18 PM, Giorgio Zarrelli wrote:
>>>>> Hi,
>>>>>
>>>>> I'm curious. Please, do a su - as the apache user and execute
>>>    the check
>>>>> as that user.
>>>>>
>>>>> Ciao,
>>>>>
>>>>> Giorgio
>>>>
>>>>
>>>   
> ------------------------------------------------------------------------------
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>>>>
>>>
>>>   
> ------------------------------------------------------------------------------
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>>>    reporting any issue.
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>>>
>>>
>>>
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>>
>>
> ------------------------------------------------------------------------------
>> Simplify data backup and recovery for your virtual environment with
> vRanger.
>> Installation's a snap, and flexible recovery options mean your data is
> safe,
>> secure and there when you need it. Data protection magic?
>> Nope - It's vRanger. Get your free trial download today.
>> http://p.sf.net/sfu/quest-sfdev2dev
>> _______________________________________________
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>> https://lists.sourceforge.net/lists/listinfo/nagios-users
>> ::: Please include Nagios version, plugin version (-v) and OS when
> reporting any issue.
>> ::: Messages without supporting info will risk being sent to /dev/null
> 
> ------------------------------------------------------------------------------
> Simplify data backup and recovery for your virtual environment with vRanger.
> Installation's a snap, and flexible recovery options mean your data is safe,
> secure and there when you need it. Data protection magic?
> Nope - It's vRanger. Get your free trial download today.
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> Nagios-users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/nagios-users
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> reporting any issue.
> ::: Messages without supporting info will risk being sent to /dev/null
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> 

------------------------------------------------------------------------------
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