sebi4

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <pthread.h>
#include <semaphore.h>  /* Semaphore */
#define NR_THREADS 10
//memset and calloc
//This structure is used to store relevand information about the message
typedef struct
{
	char sender[30];
	char data[255];
	int method;
} Message;

Message message, help;

//code from Ivett

// 1- successul 0 -failed, alread exists
char registerUser(char *userdata, char *username, char *password){

    // Open the file containing the user names and passwords
     FILE *fp;
     fp = fopen(userdata, "a+");
        if (fp == NULL)
        {
            printf("Couldn't open file\n");
            return 1;
        }
        // retains the user name read from the file
        char fusername[30];
				memset(&fusername[0], 0, sizeof(fusername));
        // retains the password read from the file
        char fpassword[255];
				memset(&fpassword[0], 0, sizeof(fpassword));

        while(!feof(fp)){
            // read the first line of the file
            fscanf(fp, "%s %s", fusername, fpassword);
            // a user with the chosen name already exists
            if(strcmp(username, fusername)==0)
                return '0';
            // jump to the next line
            fscanf(fp, "\n");
        }

        // if eof was reached and the chosen user name does not exist in the file, save the user name and password
        if(feof(fp)){
            // write user name and password to the file
            fprintf(fp, "%s %s\n", username, password);
            fclose(fp);
            // successful registration => return 1
            return '1';
        }
}

char loginUser(char *userdata, char *username, char *password){
// Open the file containing the user names and passwords

		 FILE *fp;
		 fp = fopen (userdata, "r");
		 if (fp == NULL)
		  	{
		             printf ("open\n");
		             return 2;
		     }
        // retains the user name read from the file
        char fusername[30];
				memset(&fusername[0], 0, sizeof(fusername));
        // retains the password read from the file
        char fpassword[255];
				memset(&fpassword[0], 0, sizeof(fpassword));


         while(!feof(fp)){
            // read the first line of the file
            fscanf(fp, "%s %s", fusername, fpassword);

            // a user name exists in the file
            if(strcmp(username, fusername)==0)
                // check if the matching password corresponds
                if(strcmp(password, fpassword)==0)
                    //successful login
                    return '2';
                else
                    // the given password is incorrect
                    return '1';
            // jump to the next line
            fscanf(fp, "\n");
        }
        // eof was reached and the chosen user name does not exist in the file
        if(feof(fp)){
            fclose(fp);
            // user does not exist
            return '0';
        }
}

typedef struct {
		int fd;
		Message msg;
} Thread_data;

Thread_data d;
sem_t mutex;
int counter = 0;

void* doSomething1(void* data){
	sem_wait(&mutex);       /* down semaphore */
	counter++;
	printf("Some thread shit \n");
	sem_post(&mutex);       /* up semaphore */
	pthread_exit(0);
}

void* doSomething(void* data){

}

int main(int argc, char *argv[])
{
    //testing purpose
		char *path = "/home/nix/Desktop/dp2/me.data";
		// char *user = "nicu";
		// char *pass = "sore";
		// printf("%s %s %s \n", path, user, pass);
		// char c = loginUser( path, user, pass );
		// char x = registerUser(path, "someone122", "2hispassword");
		// printf("login %c\n", c);
		// c = loginUser( path, "newlines", "many" );
		// printf("login %c\n", c);
		// printf("register %c\n", x);
		int a = NULL;
		printf("%d\n", a);
		int err,i;
		pthread_t some[NR_THREADS];
		sem_init(&mutex, 0, 1);

		for (i=0; i<NR_THREADS;i++)
		{
				err = pthread_create(&(some[i]), NULL, (void *) &doSomething1, (void *) &d);
				if(err)
     		{
         fprintf(stderr,"Error - pthread_create() return code: %d\n",err);
         exit(EXIT_FAILURE);
     		}
		}

		for(i=0; i<NR_THREADS; i++)
			pthread_join(some[i],NULL);


		sem_destroy(&mutex); /* destroy semaphore */
		printf("counter is: %2d\n", counter);
		return 0;
}