#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <dirent.h>
#include <time.h>

main(int argc, char *argv[])
{
	DIR *dirp;
	struct dirent *dentry;
	struct stat buffer;
	int errors = 0;
	char *dirname = ".";
	const char* type;

	if (argc > 1)
		dirname = argv[1];

	//change to specified directory and open for reading
	if (chdir(dirname) == -1 || (dirp = opendir(".")) == (DIR *)NULL)
	{
		fprintf(stderr, "%s: cannot access requested directory\n",
			argv[0]);
		exit(1);
	}

	printf("Name \tType \tSize \t Access Date\n");

	// iterate through directory contents
	while ((dentry = readdir(dirp)) != (struct dirent *)NULL)
	{
		/*  fetch inode information  */
		if (stat(dentry->d_name, &buffer) == (-1))
		{
			fprintf(stderr, "%s: cannot access %s\n",
				argv[0], dentry->d_name);
			errors++;
			continue;
		}
		if(S_ISDIR (buffer.st_mode))
		type = "<DIR>";
		else
		type = "     ";

		printf("%-25s\t%s\t%d\t%d\n", dentry->d_name, type,
									  buffer.st_size, buffer.st_atime);
     }
	closedir(dirp);

	exit(errors);
}