Linux IPC - Message Queue

1. Create IPC Facility Key

   

key_t mykey;

mykey = ftok(".", 'a');

 

2. Create Message Queue

 

qid = msgget(mykey, 0600 | IPC_CREATE);

 

3. Receive/Send Message

 

msgrcv(qid, buf, len, type, 0));

 

packet.mtype = type; 

len = sizeof(packet) - sizeof(long);
msgsnd(qid, &packet, len, 0);

 

4. Remove Message Queue

 

 msgctl(qid, IPC_RMID, 0);

5. The ipcs / ipcrm command

   

ipcs -q

ipcs -s

ipcs -m

ipcrm -q xxxx

ipcrm -s xxxx

ipcrm -m xxxx