#include <dirent.h>
#include <err.h>
#include <stdio.h>

static void simple_ls(char *path)
{
    if (path == NULL)
        errx(1, "Internal error: Passed NULL path");

    DIR *dir = opendir(path);
    if (dir == NULL)
        errx(1, "Internal error: cannot open directory");

    struct dirent *element;
    while ((element = readdir(dir)))
    {
        puts(element->d_name);
    }

    int res = closedir(dir);
    if (res == -1)
        errx(1, "Could not close dir");
}

int main(int argc, char **argv)
{
    if (argc < 2)
        simple_ls(".");
    else
    {
        for (int i = 1; i < argc; i++)
        {
            simple_ls(argv[i]);
        }
    }
    return 0;
}