Write a C program that uses the fork() system call to create a total of 9 processes (including the parent process). Your program must print the pids of all the processes created to a file.

• To get the pid of the current process use the getpid() function.
• I posted a couple of examples on the lab 4 section. Please study these files.
• If you wish you can modify one of example files to create 9 processes.

/**

* You can verify your answer by counting

* the number of unique processes which are output

* by the call to getpid() - which is 3 unique processes.

* Note: The statement 'printf("%d ",getpid());' prints

* the pid of the current process.

* Process tree: The root P1 has two children P2 and P3.

*/

#include

#include /* This header file has the definition for pid_t

type*/

int main()

{

pid_t pid;

printf("%d ",getpid()); /*This Will print the root*/

pid = fork();

printf("%d ",getpid());

if(pid == 0) {

/*Do Nothing*/

}

else {

fork();

printf("%d ",getpid());

}

return 0;

}

• There are two deliverables for this lab:
  • The C code for lab 4.
  • Print the output in a text file named output.txt or take a screenshot for the result.