[CentOS] OT: Howto to capture taskset output command

[C. L. Martinez]

On Wed, Feb 26, 2014 at 1:54 PM, Tris Hoar <trishoar at bgfl.org> wrote:
> 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
>

Uhmm .. You are right Tris ... The correct option is what John Doe says ..

Many thanks to all.