What is process creation in os

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In this section we will see how to use the fork() to make child process in C. We also do some different tasks in each process.

Main() fork() fork() fork() printf( hello )

Main() fork() fork() fork() printf( hello )

Fork() in os example

Write a c program to create a child process using fork() system call

Fork() system call example program in c

Process creation in linux

So in our parent process we will print different values.

When fork() is called, it returns a value. If the value is greater than 0, then currently it is in parent process, otherwise it is in child process. So using this we can distinguish between the processes.

Example Code

#include <stdio.h> #include <unistd.h> int main() {    int n = fork(); //subdivide process    if (n > 0) { //when n is not 0, then it is parent process       printf("Parent process
";    } else { //when n is 0, then it is child process       printf("Child process
");    }    return 0; }

Output

soumyadeep@soumyadeep-VirtualBox:~$ ./a.out Parent process soumyadeep@soumyadeep-VirtualBox:~$ Child process soumyadeep@soumyadeep-VirtualBox:~$