Linked list in c doesn't work properly.

[robgeek]

Hello, guys.
I have to make a task scheduler in c in which on of his processes is a process called task_scheduler should be run in the terminal command using the following syntax:
task_scheduler <hh:mm> <n> <task_name>
So, here is what i did until now. I created a file called task_scheduler.c:

#include "scanner.h"//Validates the format of the parameters coming from the terminal. Works fine.
	#include "tasks.h"//Linked list where tasks are scheduled. Woks fine.
	#include <stdio.h>
	#include <string.h>
	#include <stdlib.h>
	#include <unistd.h>
	 
	int main(int argc, char *argv[]) {
	 
	    List *list = NULL;
	    int status;
	    daemon(1, 1);//To leave the terminal free so i can use to schedule a new task, but it doesn't work properly.
	        //Continue if there are four arguments coming from terminal except the first.
	        if( (argc-1) == 3 ) {
	            if( timer( argv[1] ) && amount( argv[2] ) ) {
	                printf("Parameters accepted.\n");
	                list = addTask( list, argv[1], argv[2], argv[3] );
	            }
	        }
	        else {
	            printf("Parameters not accepted.\n");
	            return 1;
	        }
	 
	    return 0;
	}

Everything works fine in this code, but i can add only one task! If i enter in terminal:
./task_scheduler 12:12 34 anything
./task_scheduler 23:34 56 lolololol
only one task is added! The second task is added in a new instance of task_scheduler and this is not what i want!

How can i solve this problem?

[JockX]

You are setting list to NULL each time a program is called, don't you? You should store it on some persistant file, and access it when needed, as opposed to creating a new one each time.

[robgeek]

You are setting list to NULL each time a program is called, don't you? You should store it on some persistant file, and access it when needed, as opposed to creating a new one each time.

Yes, but my teacher said i can't use any persistent file.