#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <dirent.h>
#include <sys/types.h>

void *th_rt(void *arg);

int MIN = -1;

pthread_mutex_t MutexMIN = PTHREAD_MUTEX_INITIALIZER;

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

    pthread_t tid[5];

    int i;

    if(argc < 6){
        printf("usage: ./a.out <dir> <dir> <dir> <dir> <dir> \n");
        return -1;
    }

    for(i=0;i<5;i++)
        pthread_create(&tid[i],NULL,th_rt,(void *)argv[i+1]);

    for(i=0;i<5;i++)
        pthread_join(tid[i],NULL);

    printf("Min: %d\n",MIN);

    return 0;
}

void *th_rt(void *arg){
    int counter=0;
    char *dirName;
    DIR *d;

    dirName = (char *)arg;
    d = opendir(dirName);

    while(readdir(d) != NULL)
        counter++;

    printf("%s - %d\n",dirName,counter);

    pthread_mutex_lock(&MutexMIN);
    if(counter < MIN || MIN == -1) MIN = counter;
    pthread_mutex_unlock(&MutexMIN);

    pthread_exit(NULL);
}