tests/test-getcwd-lgpl.c

   1 /* Test of getcwd() function.
   2    Copyright (C) 2009-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (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 #include <config.h>
  18
  19 #include <unistd.h>
  20
  21 #include "signature.h"
  22 SIGNATURE_CHECK (getcwd, char *, (char *, size_t));
  23
  24 #include <errno.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "macros.h"
  30
  31 int
  32 main (int argc, char **argv)
  33 {
  34   char *pwd1;
  35   char *pwd2;
  36   /* If the user provides an argument, attempt to chdir there first.  */
  37   if (1 < argc)
  38     {
  39       if (chdir (argv[1]) == 0)
  40         printf ("changed to directory %s\n", argv[1]);
  41     }
  42
  43   pwd1 = getcwd (NULL, 0);
  44   ASSERT (pwd1 && *pwd1);
  45   if (1 < argc)
  46     printf ("cwd=%s\n", pwd1);
  47
  48   /* Make sure the result is usable.  */
  49   ASSERT (chdir (pwd1) == 0);
  50   ASSERT (chdir (".//./.") == 0);
  51
  52   /* Make sure that result is normalized.  */
  53   pwd2 = getcwd (NULL, 0);
  54   ASSERT (pwd2);
  55   ASSERT (strcmp (pwd1, pwd2) == 0);
  56   free (pwd2);
  57   {
  58     size_t len = strlen (pwd1);
  59     ssize_t i = len - 10;
  60     if (i < 1)
  61       i = 1;
  62     pwd2 = getcwd (NULL, len + 1);
  63     ASSERT (pwd2);
  64     free (pwd2);
  65     pwd2 = malloc (len + 2);
  66     for ( ; i <= len; i++)
  67       {
  68         char *tmp;
  69         errno = 0;
  70         ASSERT (getcwd (pwd2, i) == NULL);
  71         ASSERT (errno == ERANGE);
  72         /* Allow either glibc or BSD behavior, since POSIX allows both.  */
  73         errno = 0;
  74         tmp = getcwd (NULL, i);
  75         if (tmp)
  76           {
  77             ASSERT (strcmp (pwd1, tmp) == 0);
  78             free (tmp);
  79           }
  80         else
  81           {
  82             ASSERT (errno == ERANGE);
  83           }
  84       }
  85     ASSERT (getcwd (pwd2, len + 1) == pwd2);
  86     pwd2[len] = '/';
  87     pwd2[len + 1] = '\0';
  88   }
  89   ASSERT (strstr (pwd2, "/./") == NULL);
  90   ASSERT (strstr (pwd2, "/../") == NULL);
  91   ASSERT (strstr (pwd2 + 1 + (pwd2[1] == '/'), "//") == NULL);
  92
  93   /* Validate a POSIX requirement on size.  */
  94   errno = 0;
  95   ASSERT (getcwd (pwd2, 0) == NULL);
  96   ASSERT (errno == EINVAL);
  97
  98   free (pwd1);
  99   free (pwd2);
 100
 101   return test_exit_status;
 102 }