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We load in memory oracle tables. To read the tables, they have associate several indexes. so we have several shared memory segment:
1..n Data Segment
1..n Indexex Segment (1xIndex)
1 Control...

Resolved problem:

cc DemoIPC.c -o -N DemoIPC
DemoIPC
chatr +as mpas DemoIPC

I don´t know if i´m usuing MPAS process. How can I know it ?

---------- Post updated at 04:33 PM ---------- Previous update was at 04:04 PM ----------

Resolved problem:

cc DemoIPC.c -o -N...

I have a process that needs two active connections to the same zone of shared memory simultaneously.

The firs conection works ok, but when i do the second call to shmat it give me error 22...

Don´t worry by the 5000 (key_t), in the original source is not hardcode, this is only the example of the problem.
I have tested your solution: shmget(5000, sizeof(int), 0777 & IPC_CREAT);
and give...

5000 is the key_t key, the order is ok.

I have a process that need two active connections to the same zone of shared memory. But when i do the second call to shmat it give me error 22 (EINVAL). Only works ok the second call to shmat if i...