manual/examples/dir2.c

   1 /* Simple Program to List a Directory, Mark II
   2    Copyright (C) 1991-2024 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU General Public License
   6    as published by the Free Software Foundation; either version 2
   7    of the License, or (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <https://www.gnu.org/licenses/>.
  16 */
  17
  18 /*@group*/
  19 #include <stdio.h>
  20 #include <dirent.h>
  21 /*@end group*/
  22
  23 static int
  24 one (const struct dirent *unused)
  25 {
  26   return 1;
  27 }
  28
  29 int
  30 main (void)
  31 {
  32   struct dirent **eps;
  33   int n;
  34
  35   n = scandir ("./", &eps, one, alphasort);
  36   if (n >= 0)
  37     {
  38       int cnt;
  39       for (cnt = 0; cnt < n; ++cnt)
  40         puts (eps[cnt]->d_name);
  41     }
  42   else
  43     perror ("Couldn't open the directory");
  44
  45   return 0;
  46 }