Re: [PATCH] Fix incompatibility between opcontrol & busybox

[Maynard J. <may...@us...>]

Vitali Lovich wrote:
> This is oprofile 0.9.6 specific.  Perhaps this is a new incompatibility introduced?
That particular line has been in opcontrol since oprofile 0.9.3 (Jul 2007).  Unless I hear from other busybox users that this is a common problem, I suggest you patch your distro's oprofile rpm to workaround this problem.

-Maynard
> 
> On Dec 9, 2009, at 7:04 AM, Maynard Johnson wrote:
> 
>> Vitali Lovich wrote:
>>> We are the distro vendor :P. This isn't actually a distro bug so much as busybox not being POSIX compliant.  On embedded systems, busybox is quite likely to be used instead of POSIX utils, so I think it might make sense to perhaps allow it at least as an autoconf option (e.g. --enable-busybox or --enable-nonposix).
>> But you are certainly not the first to use oprofile on an embedded system with busybox.  Why is this affecting just you?
>>
>> *Richard*, as our resident embedded expert, have you had any experience using oprofile with busybox?
>>
>> -Maynard
>>> Thoughts?
>>>
>>> Thanks,
>>> Vitali
>>>
>>> On Dec 8, 2009, at 3:00 PM, Maynard Johnson wrote:
>>>
>>>> Vitali Lovich wrote:
>>>>> Hi.  Opcontrol fails to run with busybox due to the -m option not being available.  I can't see any problem using -c in this case.
>>>> Your distro's version of wc does not support the -m option?  Then it's not posix-compliant.  Write a bug against it.  We don't ordinarily accept patches to workaround distro bugs.
>>>>
>>>> -Maynard
>>>>> Thanks.
>>>>>
>>>>> diff --git a/utils/opcontrol b/utils/opcontrol
>>>>> index 8aee35a..285a841 100644
>>>>> --- a/utils/opcontrol
>>>>> +++ b/utils/opcontrol
>>>>> @@ -1240,7 +1240,7 @@ check_event_mapping_data()
>>>>> 			fi
>>>>> 		fi
>>>>> 	fi
>>>>> -	len=`echo -n $event_num | wc -m`
>>>>> +	len=`echo -n $event_num | wc -c`
>>>>> 	num_chars_in_grpid=`expr $len - 2`
>>>>> 	GRP_NUM_VAL=`echo | awk '{print substr("'"${event_num}"'",1,"'"${num_chars_in_grpid}"'")}'`
>>>>> 	if [ "$GRP_NUM_CK_VAL" = "" ] ; then
>>>>>
>>>>>
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>