/* Test of getcwd() function.
   Copyright (C) 2009 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <config.h>

#include <unistd.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define ASSERT(expr) \
  do                                                                         \
    {                                                                        \
      if (!(expr))                                                           \
        {                                                                    \
          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
          fflush (stderr);                                                   \
          abort ();                                                          \
        }                                                                    \
    }                                                                        \
  while (0)

int
main (int argc, char **argv)
{
  char *pwd1;
  char *pwd2;
  /* If the user provides an argument, attempt to chdir there first.  */
  if (1 < argc)
    {
      if (chdir (argv[1]) == 0)
	printf ("changed to directory %s\n", argv[1]);
    }

  pwd1 = getcwd (NULL, 0);
  ASSERT (pwd1 && *pwd1);
  if (1 < argc)
    printf ("cwd=%s\n", pwd1);

  /* Make sure the result is usable.  */
  ASSERT (chdir (pwd1) == 0);
  ASSERT (chdir ("././.") == 0);

  /* Make sure that result is normalized.  */
  pwd2 = getcwd (NULL, 0);
  ASSERT (pwd2);
  ASSERT (strcmp (pwd1, pwd2) == 0);
  free (pwd2);
  {
    size_t len = strlen (pwd1);
    size_t i = len - 10;
    if (i < 0)
      i = 0;
    pwd2 = malloc (len + 2);
    for ( ; i < len; i++)
      ASSERT (getcwd (pwd2, i) == NULL);
    pwd2 = getcwd (pwd2, len + 1);
    ASSERT (pwd2);
    pwd2[len] = '/';
    pwd2[len + 1] = '\0';
  }
  ASSERT (strstr (pwd2, "/./") == NULL);
  ASSERT (strstr (pwd2, "/../") == NULL);

  free (pwd1);
  free (pwd2);

  return 0;
}
