simplels.c

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

static int
one(struct dirent *unused)
{
 return(1);
}
 
int
main(void)
{
 struct dirent **eps;
 int n;

 n = scandir("./", &eps, one, alphasort);
 if(n >= 0)
 {
  int cnt;
  for(cnt = 0; cnt < n; cnt++)
   puts(eps[cnt]->d_name);
 }
 else
  perror("Couldn't open the diretory");
 
 return(0);
}

From: http://www.delorie.com/gnu/docs/glibc/libc_276.html