/* Test for ptsname/ptsname_r.

   Copyright (C) 2014-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Aurelien Jarno <aurelien@aurel32.net>, 2014.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <fcntl.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#define DEV_TTY		"/dev/tty"

#define PTSNAME_EINVAL	"./ptsname-einval"

static int

do_single_test (int fd, char *buf, size_t buflen, int expected_err)

{

  int ret = ptsname_r (fd, buf, buflen);

  int err = errno;

  if (expected_err == 0)

    {

      if (ret != 0)

	{

	  printf ("ptsname_r: expected: return = 0\n");

	  printf ("           got: return = %d, errno = %d (%s)\n",

	          ret, err, strerror (err));

	  return 1;

	}

    }

  else

    {

      if (ret == 0 || errno != expected_err)

	{

	  printf ("ptsname_r: expected: return = %d, errno = %d (%s)\n",

	          -1, expected_err, strerror (expected_err));

	  printf ("           got: return = %d, errno = %d (%s)\n",

	          ret, err, strerror (err));

	  return 1;

	}

    }

  return 0;

}

static int

do_test (void)

{

  char buf[512];

  int result = 0;

  /* Tests with a real PTS master.  */

  int fd = posix_openpt (O_RDWR);

  if (fd != -1)

    {

      result |= do_single_test (fd, buf, sizeof (buf), 0);

      result |= do_single_test (fd, buf, 1, ERANGE);

      close (fd);

    }

  else

    printf ("posix_openpt (O_RDWR) failed\nerrno %d (%s)\n",

	    errno, strerror (errno));

  /* Test with a terminal device which is not a PTS master.  */

  fd = open (DEV_TTY, O_RDONLY);

  if (fd != -1)

    {

      result |= do_single_test (fd, buf, sizeof (buf), ENOTTY);

      close (fd);

    }

  else

    printf ("open (\"%s\", O_RDWR) failed\nerrno %d (%s)\n",

	    DEV_TTY, errno, strerror (errno));

  /* Test with a file.  */

  fd = open (PTSNAME_EINVAL, O_RDWR | O_CREAT, 0600);

  if (fd != -1)

    {

      result |= do_single_test (fd, buf, sizeof (buf), ENOTTY);

      close (fd);

      unlink (PTSNAME_EINVAL);

    }

  else

    printf ("open (\"%s\", O_RDWR | OCREAT) failed\nerrno %d (%s)\n",

	    PTSNAME_EINVAL, errno, strerror (errno));

  return result;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"