fork()

The fork() System Call

fork() creates a new process by duplicating the calling process. The child is an almost exact copy of the parent — same memory, same open files, same code. Only a few things differ:

• The child gets a new PID
• The child's parent PID (ppid) is set to the parent's PID
• The child starts in READY state (not RUNNING)
• The child's CPU time counters are reset to 0

In the kernel, fork() calls copy_process(), which allocates a new task_struct and copies the parent's fields one by one.

Your Implementation

Write void my_fork(PCB *parent, PCB *child, int new_pid) that initializes child as a copy of parent with the new PID and READY state.

void my_fork(PCB *parent, PCB *child, int new_pid) {
    child->pid      = new_pid;
    child->state    = READY;
    child->priority = parent->priority;
    // copy name
    char *s = parent->name, *d = child->name;
    while (*s) *d++ = *s++;
    *d = '\0';
}

After forking, print both parent and child with print_pcb.

Your Task

Implement my_fork that copies the parent PCB into the child, assigning the new PID and setting state to READY.