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

int main(int argc, char *argv[]) {

    if (argc < 2) {
        printf("Usage: %s <command1> <command2> ... <commandN>\n", argv[0]);
        return 1;
    }

    int num_commands = argc - 1;
    printf("Num of commands: %d\n", num_commands);

    int status;
    pid_t pid;

    int child_index[num_commands];

    for (int i = 0; i < num_commands; i++) {

        pid = fork();
        if (pid == -1) {
            perror("Fork failed");
            exit(1);
        }

        if (pid == 0) {  // Child process
            execl(argv[i + 1], argv[i + 1], (char *)0);
            perror("Execl failed");
            exit(1);
        } else {
            child_index[i] = pid;
        }
    }

    // Parent process
    for (int i = 0; i < num_commands; i++) {
        pid = wait(&status);

        // Print out success message to the corresponding command index for this child PID
        for (int j = 0; j < num_commands; j++) {
            if (child_index[j] == pid) {
                if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
                    printf("Command %s has completed successfully\n", argv[j + 1]);
                } else {
                    printf("Command %s has not completed successfully\n", argv[j + 1]);
                }
                break;
            }
        }
    }

    printf("All done, bye-bye!\n");

    return 0;
}