#include <stdlib.h>
#include <stdio.h>
#include "commandlinereader.h"
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>

#define MAXARGS 7


typedef struct processarray{
    int pid;
    int status;
    struct processarray *next;
} Processarray_t;



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

    int nargs;
    int nforks = 0;
    int pid;
    char *args[MAXARGS];
    int status;
    int x;
    int y;

    Processarray_t* head = NULL;
    Processarray_t* temp;

    while(1){

        nargs = readLineArguments(args,MAXARGS);

        if (nargs > 0){

            if (strcmp(args[0],"exit") != 0){
                pid = fork();
                nforks++;

                if (pid < 0){
                    printf("Process error\n");
                    exit(EXIT_FAILURE);
                }

                else{
                    if (pid == 0){
                        execv(args[0], args);
                        exit(EXIT_FAILURE);
                    }
                }
            }

            if (strcmp(args[0],"exit") == 0){

                for (x = 0, x < nforks, x++){
                    if (head == NULL){
                        head = malloc(sizeof(Processarray_t));
                        head->next = NULL;
                        head->pid = wait(&status);
                        head->status = status;
                    }
                    else{
                        temp = head;
                        while (temp->next != NULL){
                            temp = temp->next;
                        }
                        temp->next = malloc(sizeof(Processarray_t));
                        temp->next->next = NULL;
                        temp->next->pid = wait(&status);
                        temp->next->status = status;
                    }
                }

                temp = head;

                while (temp != NULL){
                    if (WIFEXITED(temp->status)){
                        printf("Child process %d terminated with status %d\n", temp->pid, WEXITSTATUS(temp->status));
                    }
                    temp = temp->next;
                }
                return 0;
            }
        }
    }
}