Yes that is my query what path to choose to make sure that it would
generate same key in both dylib and app.
regards
On Mon, Dec 1, 2008 at 9:16 AM, Luke Hiesterman <email@hidden> wrote:
> If you use the same path and same id for ftok on both processes then you
> will get the same key for use with semget. This is precisely the purpose of
> ftok.
>
> Luke
>
> Sent from my iPhone.
>
> On Nov 30, 2008, at 7:15 PM, Rakesh Singhal <email@hidden>
> wrote:
>
>> Thanks. The problem I have to give file path to generate key. How will
>> I ensure that the path I am giving will work always to generate the
>> same key? I have one application and another is dynamic library and I
>> want to generate the same key in both to use.
>>
>> Regards
>> rksinghal
>>
>>
>> On Mon, Dec 1, 2008 at 12:56 AM, Luke Hiesterman <email@hidden>
>> wrote:
>>>
>>> Why exactly do you want to avoid ftok? It's a good way to generate shared
>>> keys.
>>>
>>> It's always possible to generate an integer key some other way yourself
>>> and
>>> then you just have to figure out how to communicate it across processes.
>>> You
>>> could write it to a file or send it over a socket.
>>>
>>> Luke
>>>
>>> Sent from my iPhone.
>>>
>>> On Nov 30, 2008, at 3:25 AM, Rakesh Singhal <email@hidden>
>>> wrote:
>>>
>>>> Is it possible to use semget() without using ftok() for IPC
>>>> communication?
>>>>
>>>> Please suggest me.
>>>>
>>>> Regards
>>>> rksinghal
>>>>
>>>> On Fri, Nov 28, 2008 at 9:54 AM, Rakesh Singhal
>>>> <email@hidden> wrote:
>>>>>
>>>>> Thanks. Now I am using following set of APIs:
>>>>>
>>>>> ftok()
>>>>> semget()
>>>>> semop()
>>>>> semctl()
>>>>>
>>>>> It is working till now :)
>>>>>
>>>>> Regards
>>>>> rksinghal
>>>>>
>>>>> On Thu, Nov 27, 2008 at 9:49 AM, Terry Lambert <email@hidden>
>>>>> wrote:
>>>>>>
>>>>>> On Nov 26, 2008, at 7:31 PM, Rakesh Singhal wrote:
>>>>>>>
>>>>>>> Hi all
>>>>>>>
>>>>>>> I tried to use sem_init() but I think it is not there to use. It is
>>>>>>> declared in semaphore.h but when I do man sem_init() then it gives
>>>>>>> the
>>>>>>> message "No manual entry for sem_init".
>>>>>>>
>>>>>>> Now, I am using sem_open(). I think it is right API to create unique
>>>>>>> semaphore between multi-processes. But creating it in one process if
>>>>>>> I
>>>>>>> try to create in another process, the value of semaphore is not same.
>>>>>>> I am using same name in both process(1st argument of sem_open()).
>>>>>>>
>>>>>>> Please suggest to create semaphore (cross-processes).
>>>>>>
>>>>>> POSIX unnamed semaphores are not supported.
>>>>>>
>>>>>> Use either POSIX named semaphores, or use System V semaphores:
>>>>>>
>>>>>> man sem_open
>>>>>> man semget
>>>>>>
>>>>>> -- Terry
>>>>>>
>>>>>
>>>
>
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