Start with your phase1.c program.
Copy 3600/4/phase1.c to 3600/4/phase2.c
Stay in the 3600/4 directory for now.
Please make these required updates...
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1. Do not call the main() function anywhere in your program.
2. Call execve() to create a child window.
Do this after your call to fork().
3. After starting a child, the parent will display some boxes of varying color,
and one black box.
4. When the user clicks a colored box, the child's background color will
change to that color.
5. When the black box is clicked, the child window will close.
Rules:
The parent and child windows will communicate using an IPC Message Queue.
Do not use IPC Shared Memory, or any other communication method.
The parent will send messages with a call to msgsnd().
The child will receive messages with a call to msgrcv().
The child will receive messages from the parent inside a thread.
Only the parent process will establish a Message Queue ID.
Only the child process will start a thread.
It is recommended that the parent sends the Message Queue ID to the child
in the command-line argument array of the execve() call.
You may start on phase-2.
More will be listed on this page to help you.
