Kevin Sooter - Processes

[kevin-sooter]

No description provided.

[codejoncode]

if (rc < 0)
    { // fork failed; exit
        fprintf(stderr, "fork failed\n");
        exit(1);
    }

Nice!!! Good thinking prepared for even an error.

[codejoncode]

For ex4, you are getting in done Kevin. We will disuss this more in detail tomorrow but we can also accept arguments like this:

int main(int argc, char* argv[])
{
    printf("Parent process here\n");
    int rc = fork();

    if (rc < 0) {
        fprintf(stderr, "fork failed\n");
        exit(1);
    } else if (rc == 0) {
        printf("Child process here\n");

        // execl("/bin/ls", "ls", "-l" (char *) NULL);
        
        // char *args[] = {"ls", "-l", NULL};
        // execv("/bin/ls", args);

        //execlp("ls", "ls", "-l", (char *) NULL);

        char *args[] = {"ls", "-l", NULL};
        execvp("ls", args);
    } else {
        int wc = waitpid(rc, NULL, 0);
    }

    return 0;
}

This way we would then pass "/bin/ls"

[codejoncode]

The biggest difference is we could replace char *args[] = {"ls", "-l", NULL}; with your char * argv[] main argument (ex4)

[codejoncode]

For ex6 Kevin you have fileno(stdout); is what the solution has for this line write(fileno(stdout), NULL, 0); though you may not notice a difference in your output.