[CentOS] OT: Howto to capture taskset output command

[Tris Hoar]

On 26/02/2014 13:45, C. L. Martinez wrote:
> On Wed, Feb 26, 2014 at 1:40 PM, sjt5atra <sjt5atra at gmail.com> wrote:
>>
>>
>>
>>
>>> On Feb 26, 2014, at 8:28 AM, "C. L. Martinez" <carlopmart at gmail.com> wrote:
>>>
>>>> On Wed, Feb 26, 2014 at 12:40 PM, Steven Tardy <sjt5atra at gmail.com> wrote:
>>>> On Wed, Feb 26, 2014 at 6:57 AM, C. L. Martinez <carlopmart at gmail.com>wrote:
>>>>
>>>>>     if [ "$cpu_affinity" == "$cpu_affinity_ok" ]; then
>>>>
>>>> are you comparing strings or integers?
>>>> # man test
>>>>        STRING1 = STRING2
>>>>               the strings are equal
>>>>        INTEGER1 -eq INTEGER2
>>>>               INTEGER1 is equal to INTEGER2
>>>
>>> Thanks Steven, but it doesn't works also ..
>>>
>>> Using if [ "$cpu_affinity" -eq "$cpu_affinity_ok" ]; then
>>> ./cpu_affinitty: line 7: [: taskset -p -c 27756 | awk '{ print  }':
>>> integer expression expected
>>
>> Yes, since you are double quoting you are using strings. Try using a single = sign instead of your original double equal sign.
>
>
> Ok, problem solved. With this compare function:
>
> if [[ "$bro_cpu_affinity" == *"$cpu_affinity_ok"* ]]; then
>
> works ok ...
>
> sjt5atra, using a single =, it doesn't works ...

The issues are to do with your variable expansion

[root at srvman ~]# cpu_affinity="taskset -p -c `cat /var/run/crond.pid` | 
awk '{print $6}'"
[root at srvman ~]# echo $cpu_affinity
taskset -p -c 2532 | awk '{print }'

I think your script is still broken, as you are now just looking for any 
number matching $cpu_affinity_ok in $cpu_affinity. You should be able to 
do an integer comparison for your if statement.

Tris


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