Blame stdio-common/test-vfprintf.c

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/* Tests of *printf for very large strings.
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   Copyright (C) 2000-2018 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, see
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   <http://www.gnu.org/licenses/>.  */
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#include <array_length.h>
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#include <locale.h>
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#include <mcheck.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <libc-diag.h>
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const char *locs[] =
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{
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  "C", "de_DE.ISO-8859-1", "de_DE.UTF-8", "ja_JP.EUC-JP"
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};
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char large[50000];
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static int
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do_test (void)
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{
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  char buf[25];
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  size_t i;
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  int res = 0;
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  int fd;
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  mtrace ();
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  strcpy (buf, "/tmp/test-vfprintfXXXXXX");
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  fd = mkstemp (buf);
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  if (fd == -1)
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    {
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      printf ("cannot open temporary file: %m\n");
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      exit (1);
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    }
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  unlink (buf);
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  for (i = 0; i < array_length (locs); ++i)
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    {
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      FILE *fp;
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      struct stat st;
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      int fd2;
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      setlocale (LC_ALL, locs[i]);
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      memset (large, '\1', sizeof (large));
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      large[sizeof (large) - 1] = '\0';
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      fd2 = dup (fd);
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      if (fd2 == -1)
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	{
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	  printf ("cannot dup for locale %s: %m\n",
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		  setlocale (LC_ALL, NULL));
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	  exit (1);
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	}
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      if (ftruncate (fd2, 0) != 0)
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	{
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	  printf ("cannot truncate file for locale %s: %m\n",
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		  setlocale (LC_ALL, NULL));
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	  exit (1);
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	}
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      fp = fdopen (fd2, "a");
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      if (fp == NULL)
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	{
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	  printf ("cannot create FILE for locale %s: %m\n",
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		  setlocale (LC_ALL, NULL));
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	  exit (1);
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	}
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      fprintf (fp, "%s", large);
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      fprintf (fp, "%.*s", 30000, large);
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      large[20000] = '\0';
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      /* We're testing a large format string here and need to generate it
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         to avoid this source file being ridiculous.  So disable the warning
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         about a generated format string.  */
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      DIAG_PUSH_NEEDS_COMMENT;
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      DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat-security");
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      fprintf (fp, large);
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      DIAG_POP_NEEDS_COMMENT;
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      fprintf (fp, "%-1.300000000s", "hello");
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      if (fflush (fp) != 0 || ferror (fp) != 0 || fclose (fp) != 0)
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	{
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	  printf ("write error for locale %s: %m\n",
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		  setlocale (LC_ALL, NULL));
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	  exit (1);
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	}
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      if (fstat (fd, &st) != 0)
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	{
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	  printf ("cannot stat for locale %s: %m\n",
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		  setlocale (LC_ALL, NULL));
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	  exit (1);
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	}
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      else if (st.st_size != 50000 + 30000 + 19999 + 5)
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	{
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	  printf ("file size incorrect for locale %s: %jd instead of %jd\n",
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		  setlocale (LC_ALL, NULL),
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		  (intmax_t) st.st_size,
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		  (intmax_t) 50000 + 30000 + 19999 + 5);
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	  res = 1;
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	}
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      else
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	printf ("locale %s OK\n", setlocale (LC_ALL, NULL));
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    }
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  close (fd);
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  return res;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"