ap/libc/glibc/glibc-2.23/manual/examples/dir2.c

/* Simple Program to List a Directory, Mark II
   Copyright (C) 1991-2016 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
*/

/*@group*/
#include <stdio.h>
#include <dirent.h>
/*@end group*/

static int
one (const 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 directory");

  return 0;
}