C Program to show an example of fork and exec System Calls

 

C Program to show an example of fork and exec System Calls

#include<stdio.h>
#include<unistd.h>
#include<stdlib.h>
#include<sys/types.h>
int main()
{
        pid_t pid;
        char *args[]={"/bin/ls","-l",0};
        printf("Parent Process PID :%d",getpid());
        pid=fork();
        if(pid==0)
        {
                printf("\nChild process PID :%d and Parent process is: %d\n",getpid(),getppid());
        }
        else
        {
                wait();
                execv("/bin/ls",args);
                exit(0);
        }
}