Bonus Tasks: Inter-Process Communication. Message Queue.

Tasks

Make the 09_IPC2 directory and store code there. Use examples on message queues from the lecture.

1. Write a program sendmq.c that sends a message with priority 1 through the specified queue:
   1. ./sendmq /queue Message should send a message "Message" to queue "/queue" with priority 1;
   2. you may also copy+paste and test other lecture examples:
      • queue creation;
      • message receiving;
      • queue unlinking.
2. Write a “messaging server” mqserver.c that constantly waits on message queue and prints every message received:
   1. create a queue;
   2. wait for the message and receive it;
   3. if this message is not equal to string "QUIT" (i.e. 5 bytes: ‘Q’, ‘U’, ‘I’, ‘T’, and 0), then print it and return to the previous step;
   4. stop receiving and unlink the queue if message is string "QUIT".
3. Modify server to catch SIGINT. Name resulting program mqsignal.c:
   1. so when pressing Control+C the program should stop reading messages, unlink the queue and stop;
   2. check every function called for possible errors.