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

int main(int argc, char** argv)
{
    DIR *dp;
    struct dirent *ep;
    int counter = 0;

    if(argc != 2)
    {
        printf("USAGE: %s /path/to/dir\n", argv[0]);
        return 0;
    }

    dp = opendir(argv[1]);
    if (dp != NULL)
    {
        while (ep = readdir(dp))
        {
            puts(ep -> d_name);
            if(counter == 1000)
                break;

            counter++;
        }
        (void) closedir(dp);
    }
    else
        perror("Couldn't open the directory.");

    return 0;
}