dirent/opendir-tst1.c

   1 /* Copyright (C) 1998-2023 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    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <dirent.h>
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <sys/stat.h>
  26
  27 /* Name of the FIFO.  */
  28 char tmpname[] = "fifoXXXXXX";
  29
  30
  31 /* Do the real work.  */
  32 static int
  33 real_test (void)
  34 {
  35   DIR *dirp;
  36
  37   /* This should not block for an FIFO.  */
  38   dirp = opendir (tmpname);
  39
  40   /* Successful.  */
  41   if (dirp != NULL)
  42     {
  43       /* Oh, oh, how can this work?  */
  44       fputs ("`opendir' succeeded on a FIFO???\n", stdout);
  45       closedir (dirp);
  46       return 1;
  47     }
  48
  49   if (errno != ENOTDIR)
  50     {
  51       fprintf (stdout, "`opendir' return error `%s' instead of `%s'\n",
  52                strerror (errno), strerror (ENOTDIR));
  53       return 1;
  54     }
  55
  56   return 0;
  57 }
  58
  59
  60 static int
  61 do_test (void)
  62 {
  63   int retval;
  64
  65   if (mktemp (tmpname) == NULL)
  66     {
  67       perror ("mktemp");
  68       return 1;
  69     }
  70
  71   /* Try to generate a FIFO.  */
  72   if (mknod (tmpname, 0600 | S_IFIFO, 0) < 0)
  73     {
  74       perror ("mknod");
  75       /* We cannot make this an error.  */
  76       return 0;
  77     }
  78
  79   retval = real_test ();
  80
  81   remove (tmpname);
  82
  83   return retval;
  84 }
  85
  86
  87 static void
  88 do_cleanup (void)
  89 {
  90   remove (tmpname);
  91 }
  92 #define CLEANUP_HANDLER do_cleanup
  93
  94 #include <support/test-driver.c>