trouvé dans la doc de la libc

http://www.delorie.com/gnu/docs/glibc/libc_269.html(...)

14.2.4 Simple Program to List a Directory


Here's a simple program that prints the names of the files in the current working directory:




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

int
main (void)
{
DIR *dp;
struct dirent *ep;

dp = opendir ("./");
if (dp != NULL)
{
while (ep = readdir (dp))
puts (ep->d_name);
(void) closedir (dp);
}
else
perror ("Couldn't open the directory");

return 0;
}