Ejemplo Basico

#include "apue.h"
#include <dirent.h>

int
main(int argc, char *argv[])
{
	DIR				*dp;
	struct dirent	*dirp;
    
	if (argc != 2)
		err_quit("usage: ls directory_name");
    
	if ((dp = opendir(argv[1])) == NULL)
		err_sys("can't open %s", argv[1]);
	while ((dirp = readdir(dp)) != NULL)
		printf("%s\n", dirp->d_name);
    
	closedir(dp);
	exit(0);
}