Fork 2 Processes And Then Exit When They Complete-C Program

Instructions

Objective

Write a program that allows users to fork 2 processes and then exit when they complete in C language.

Requirements and Specifications

Process Activity – Programming Language: C

Create a program (forkchildren.c) that will fork off two children.
One child will run the “ls -l” command
The other will run “cat forkchildren.c”
The main program will wait for the children to finish and then print a note saying it is finished and then it will end.
No pipe is needed for this assignment, each child is separate.

Screenshots of output

program to fork 2 processes then exit when they complete in C

Source Code

#include 
#include 
#include 
#include 
int main()
{
    pid_t pid1, pid2;
    int status;
    pid1 = fork(); /* fork parent */
    if (pid1 == -1) /* if error */
    {
        printf("Error forking first child\n");
        return (EXIT_FAILURE);
    }
    else if (pid1 == 0) /* if in the first child */
    {
        /* execute "ls -l" */
        if (execlp("ls", "ls", "-l", (char *) NULL) < 0)
        {
            printf("Error in first child\n");
            exit(EXIT_FAILURE);
        }
    }
    pid2 = fork(); /* fork parent again */
    if (pid2 == -1) /* if error */
    {
        printf("Error forking second child\n");
        return (EXIT_FAILURE);
    }
    else if (pid2 == 0) /* if in the second child */
    {
        /* execute "cat forkchildren.c" */
        if (execlp("cat", "cat", "forkchildren.c", (char *) NULL) < 0)
        {
            printf("Error in second child\n");
            exit(EXIT_FAILURE);
        }
    }
    /* wait for all children to end */
    while (wait(&status) > 0);
    printf("Main program completed...\n");
    return (EXIT_SUCCESS);
}

Program To Allow Users To Fork 2 Processes And Then Exit When They Complete In C Language Assignment Solution.

Instructions

Requirements and Specifications