dirent/list.c

   1 /* Copyright (C) 1991-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <stddef.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <dirent.h>
  23
  24
  25 static int
  26 test (const char *name)
  27 {
  28   DIR *dirp;
  29   struct dirent *entp;
  30   int retval = 0;
  31
  32   puts (name);
  33
  34   dirp = opendir (name);
  35   if (dirp == NULL)
  36     {
  37       perror ("opendir");
  38       return 1;
  39     }
  40
  41   errno = 0;
  42   while ((entp = readdir (dirp)) != NULL)
  43     printf ("%s\tfile number %lu\n",
  44             entp->d_name, (unsigned long int) entp->d_fileno);
  45
  46   if (errno)
  47     {
  48       perror ("readdir");
  49       retval = 1;
  50     }
  51
  52   if (closedir (dirp) < 0)
  53     {
  54       perror ("closedir");
  55       retval = 1;
  56     }
  57
  58   return retval;
  59 }
  60
  61 int
  62 main (int argc, char **argv)
  63 {
  64   int retval = 0;
  65   --argc;
  66   ++argv;
  67
  68   if (argc == 0)
  69     retval = test (".");
  70   else
  71     while (argc-- > 0)
  72       retval |= test (*argv++);
  73
  74   return retval;
  75 }