/* Copyright (C) 1997-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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 <stdio.h>

#include <stdlib.h>

static void

write_data (FILE *stream)

{

  int i;

  for (i=0; i<100; i++)

    fprintf (stream, "%d\n", i);

  if (ferror (stream))

    {

      fprintf (stderr, "Output to stream failed.\n");

      exit (1);

    }

}

static void

read_data (FILE *stream)

{

  int i, j;

  for (i=0; i<100; i++)

    {

      if (fscanf (stream, "%d\n", &j) != 1 || j != i)

	{

	  if (ferror (stream))

	    perror ("fscanf");

	  puts ("Test FAILED!");

	  exit (1);

	}

    }

}

static int

do_test (void)

{

  FILE *output, *input;

  int wstatus, rstatus;

  /* We must remove this entry to assure the `cat' binary does not use

     the perhaps incompatible new shared libraries.  */

  unsetenv ("LD_LIBRARY_PATH");

  output = popen ("/bin/cat >" OBJPFX "tstpopen.tmp", "w");

  if (output == NULL)

    {

      perror ("popen");

      puts ("Test FAILED!");

      exit (1);

    }

  write_data (output);

  wstatus = pclose (output);

  printf ("writing pclose returned %d\n", wstatus);

  input = popen ("/bin/cat " OBJPFX "tstpopen.tmp", "r");

  if (input == NULL)

    {

      perror (OBJPFX "tstpopen.tmp");

      puts ("Test FAILED!");

      exit (1);

    }

  read_data (input);

  rstatus = pclose (input);

  printf ("reading pclose returned %d\n", rstatus);

  remove (OBJPFX "tstpopen.tmp");

  errno = 0;

  output = popen ("/bin/cat", "m");

  if (output != NULL)

    {

      puts ("popen called with illegal mode does not return NULL");

      puts ("Test FAILED!");

      exit (1);

    }

  if (errno != EINVAL)

    {

      puts ("popen called with illegal mode does not set errno to EINVAL");

      puts ("Test FAILED!");

      exit (1);

    }

  puts (wstatus | rstatus  ? "Test FAILED!" : "Test succeeded.");

  return (wstatus | rstatus);

}

#define TEST_FUNCTION do_test ()

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