Orphan process simple C program.

a. Add the include directives for the stdio.h, stdlib.h and unistd.h libraries.

b. Declare a pointer to a char called name.

c. Declare a variable called pid with the data type pid_t and invoke the fork() system call, assigning the result to pid.

d. Write an if-else if-else branching statement to handle the child process, parent process, and error case, respectively.

i. In the child process, print "child: %d started " using the getpid() system call for the %d. Then, print "child: parent = %d " using the getppid() system call for the %d. Now, print another child status (use "child: ") to indicate the child is about to go to sleep. Then, sleep for 25 seconds. Finally, print a child status to indicate that the child just woke up.

ii. In the parent process, print "parent: %d started " using the getpid() system call for the %d. Then print "parent: parent = %d " using the getppid() system call for the %d.

iii. In the error case, call the perror() system call with "fork error".

e. Outside of the if-else if-else branching statement, use the ternary operator to assign "child" to the name character pointer if pid is 0 and "parent" otherwise. Then, print "%s: terminating " using the name character pointer for the %s.

Now, compile and run your program. After your program initially runs, but before the child process has terminated, enter the ps -ef|grep $USER command to see your existing processes. You should notice your child process is still running, but has 1 for its parent process this means that the init process has taken over as the parent (since our parent terminated) and will handle the child once it has terminated.