stdlib/test-canon2.c

   1 /* Test for realpath/canonicalize function.
   2    Copyright (C) 1998-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <string.h>
  22
  23
  24 /* Prototype for our test function.  */
  25 extern void do_prepare (int argc, char *argv[]);
  26 extern int do_test (int argc, char *argv[]);
  27
  28 /* We have a preparation function.  */
  29 #define PREPARE do_prepare
  30
  31 #include <test-skeleton.c>
  32
  33 /* Name of the temporary files we create.  */
  34 char *name1;
  35 char *name2;
  36
  37 /* Preparation.  */
  38 void
  39 do_prepare (int argc, char *argv[])
  40 {
  41   size_t test_dir_len;
  42
  43   test_dir_len = strlen (test_dir);
  44
  45   /* Generate the circular symlinks.  */
  46   name1 = malloc (test_dir_len + sizeof ("/canonXXXXXX"));
  47   mempcpy (mempcpy (name1, test_dir, test_dir_len),
  48            "/canonXXXXXX", sizeof ("/canonXXXXXX"));
  49   name2 = strdup (name1);
  50
  51   add_temp_file (mktemp (name1));
  52   add_temp_file (mktemp (name2));
  53 }
  54
  55
  56 /* Run the test.  */
  57 int
  58 do_test (int argc, char *argv[])
  59 {
  60   char *canon;
  61
  62   printf ("create symlinks from %s to %s and vice versa\n", name1, name2);
  63   if (symlink (name1, name2) == -1
  64       || symlink (name2, name1) == -1)
  65     /* We cannot test this.  */
  66     return 0;
  67
  68   /* Call the function.  This is equivalent the using `realpath' but the
  69      function allocates the room for the result.  */
  70   errno = 0;
  71   canon = canonicalize_file_name (name1);
  72
  73   return canon != NULL || errno != ELOOP;
  74 }