dirent/opendir-tst1.c

   1 /* Copyright (C) 1998-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <dirent.h>
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/stat.h>
  27
  28 /* Name of the FIFO.  */
  29 char tmpname[] = "fifoXXXXXX";
  30
  31
  32 /* Do the real work.  */
  33 static int
  34 real_test (void)
  35 {
  36   DIR *dirp;
  37
  38   /* This should not block for an FIFO.  */
  39   dirp = opendir (tmpname);
  40
  41   /* Successful.  */
  42   if (dirp != NULL)
  43     {
  44       /* Oh, oh, how can this work?  */
  45       fputs ("`opendir' succeeded on a FIFO???\n", stdout);
  46       closedir (dirp);
  47       return 1;
  48     }
  49
  50   if (errno != ENOTDIR)
  51     {
  52       fprintf (stdout, "`opendir' return error `%s' instead of `%s'\n",
  53                strerror (errno), strerror (ENOTDIR));
  54       return 1;
  55     }
  56
  57   return 0;
  58 }
  59
  60
  61 static int
  62 do_test (void)
  63 {
  64   int retval;
  65
  66   if (mktemp (tmpname) == NULL)
  67     {
  68       perror ("mktemp");
  69       return 1;
  70     }
  71
  72   /* Try to generate a FIFO.  */
  73   if (mknod (tmpname, 0600 | S_IFIFO, 0) < 0)
  74     {
  75       perror ("mknod");
  76       /* We cannot make this an error.  */
  77       return 0;
  78     }
  79
  80   retval = real_test ();
  81
  82   remove (tmpname);
  83
  84   return retval;
  85 }
  86
  87
  88 static void
  89 do_cleanup (void)
  90 {
  91   remove (tmpname);
  92 }
  93 #define CLEANUP_HANDLER do_cleanup
  94
  95 #include <support/test-driver.c>