/* Test of getcwd() function.

   Copyright (C) 2009-2019 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 3 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 <https://www.gnu.org/licenses/>.  */

#include <config.h>

#include <unistd.h>

#include "signature.h"

SIGNATURE_CHECK (getcwd, char *, (char *, size_t));

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "macros.h"

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);

    ssize_t i = len - 10;

    if (i < 1)

      i = 1;

    pwd2 = getcwd (NULL, len + 1);

    ASSERT (pwd2);

    free (pwd2);

    pwd2 = malloc (len + 2);

    for ( ; i <= len; i++)

      {

        char *tmp;

        errno = 0;

        ASSERT (getcwd (pwd2, i) == NULL);

        ASSERT (errno == ERANGE);

        /* Allow either glibc or BSD behavior, since POSIX allows both.  */

        errno = 0;

        tmp = getcwd (NULL, i);

        if (tmp)

          {

            ASSERT (strcmp (pwd1, tmp) == 0);

            free (tmp);

          }

        else

          {

            ASSERT (errno == ERANGE);

          }

      }

    ASSERT (getcwd (pwd2, len + 1) == pwd2);

    pwd2[len] = '/';

    pwd2[len + 1] = '\0';

  }

  ASSERT (strstr (pwd2, "/./") == NULL);

  ASSERT (strstr (pwd2, "/../") == NULL);

  ASSERT (strstr (pwd2 + 1 + (pwd2[1] == '/'), "//") == NULL);

  /* Validate a POSIX requirement on size.  */

  errno = 0;

  ASSERT (getcwd(pwd2, 0) == NULL);

  ASSERT (errno == EINVAL);

  free (pwd1);

  free (pwd2);

  return 0;

}