stdio-common/test-vfprintf.c

   1 /* Tests of *printf for very large strings.
   2    Copyright (C) 2000-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <locale.h>
  21 #include <mcheck.h>
  22 #include <stdint.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/stat.h>
  28 #include <libc-internal.h>
  29
  30
  31 const char *locs[] =
  32 {
  33   "C", "de_DE.ISO-8859-1", "de_DE.UTF-8", "ja_JP.EUC-JP"
  34 };
  35 #define nlocs (sizeof (locs) / sizeof (locs[0]))
  36
  37
  38 char large[50000];
  39
  40 static int
  41 do_test (void)
  42 {
  43   char buf[25];
  44   size_t i;
  45   int res = 0;
  46   int fd;
  47
  48   mtrace ();
  49
  50   strcpy (buf, "/tmp/test-vfprintfXXXXXX");
  51   fd = mkstemp (buf);
  52   if (fd == -1)
  53     {
  54       printf ("cannot open temporary file: %m\n");
  55       exit (1);
  56     }
  57   unlink (buf);
  58
  59   for (i = 0; i < nlocs; ++i)
  60     {
  61       FILE *fp;
  62       struct stat st;
  63       int fd2;
  64
  65       setlocale (LC_ALL, locs[i]);
  66
  67       memset (large, '\1', sizeof (large));
  68       large[sizeof (large) - 1] = '\0';
  69
  70       fd2 = dup (fd);
  71       if (fd2 == -1)
  72         {
  73           printf ("cannot dup for locale %s: %m\n",
  74                   setlocale (LC_ALL, NULL));
  75           exit (1);
  76         }
  77
  78       if (ftruncate (fd2, 0) != 0)
  79         {
  80           printf ("cannot truncate file for locale %s: %m\n",
  81                   setlocale (LC_ALL, NULL));
  82           exit (1);
  83         }
  84
  85       fp = fdopen (fd2, "a");
  86       if (fp == NULL)
  87         {
  88           printf ("cannot create FILE for locale %s: %m\n",
  89                   setlocale (LC_ALL, NULL));
  90           exit (1);
  91         }
  92
  93       fprintf (fp, "%s", large);
  94       fprintf (fp, "%.*s", 30000, large);
  95       large[20000] = '\0';
  96       /* We're testing a large format string here and need to generate it
  97          to avoid this source file being ridiculous.  So disable the warning
  98          about a generated format string.  */
  99       DIAG_PUSH_NEEDS_COMMENT;
 100       DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat-security");
 101       fprintf (fp, large);
 102       DIAG_POP_NEEDS_COMMENT;
 103       fprintf (fp, "%-1.300000000s", "hello");
 104
 105       if (fflush (fp) != 0 || ferror (fp) != 0 || fclose (fp) != 0)
 106         {
 107           printf ("write error for locale %s: %m\n",
 108                   setlocale (LC_ALL, NULL));
 109           exit (1);
 110         }
 111
 112       if (fstat (fd, &st) != 0)
 113         {
 114           printf ("cannot stat for locale %s: %m\n",
 115                   setlocale (LC_ALL, NULL));
 116           exit (1);
 117         }
 118       else if (st.st_size != 50000 + 30000 + 19999 + 5)
 119         {
 120           printf ("file size incorrect for locale %s: %jd instead of %jd\n",
 121                   setlocale (LC_ALL, NULL),
 122                   (intmax_t) st.st_size,
 123                   (intmax_t) 50000 + 30000 + 19999 + 5);
 124           res = 1;
 125         }
 126       else
 127         printf ("locale %s OK\n", setlocale (LC_ALL, NULL));
 128     }
 129
 130   close (fd);
 131
 132   return res;
 133 }
 134
 135 #define TEST_FUNCTION do_test ()
 136 #include "../test-skeleton.c"