GTU OS Program - 15 Process creation

15. Write a program for process creation using C. (Use of gcc compiler)

Start by creating a new file called process.c using vim

Complete code of the program

#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

/* Execute the command using this shell program.  */
#define SHELL "/bin/sh"

int
my_system (const char *command)
{
        int status;
        pid_t pid;

        pid = fork ();
        if (pid == 0)
        {
                /* This is the child process.  Execute the shell command. */
                execl (SHELL, SHELL, "-c", command, NULL);
                _exit (EXIT_FAILURE):
        }
        else if (pid < 0 )
                //the fork failed. Report failure
                status = -1;
        else
                // this is the parent process. It waits for the child process to complete
                if (waitpid (pid, &status, 0) != pid)
                        status = -1;
        return status;
}

compiling the process.c file using gcc and executing it in terminal

tkanu025@hp:~/lab_solutions$ gcc process.c

Output

unfortunately I am facing a problem in installing gcc in my ubuntu. I will upload the output image as soon as that problem is resolved.

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