stdio-common/test-vfprintf.c

   1 /* Tests of *printf for very large strings.
   2    Copyright (C) 2000-2018 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 <array_length.h>
  21 #include <locale.h>
  22 #include <mcheck.h>
  23 #include <stdint.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <sys/stat.h>
  29 #include <libc-diag.h>
  30
  31
  32 const char *locs[] =
  33 {
  34   "C", "de_DE.ISO-8859-1", "de_DE.UTF-8", "ja_JP.EUC-JP"
  35 };
  36
  37 char large[50000];
  38
  39 static int
  40 do_test (void)
  41 {
  42   char buf[25];
  43   size_t i;
  44   int res = 0;
  45   int fd;
  46
  47   mtrace ();
  48
  49   strcpy (buf, "/tmp/test-vfprintfXXXXXX");
  50   fd = mkstemp (buf);
  51   if (fd == -1)
  52     {
  53       printf ("cannot open temporary file: %m\n");
  54       exit (1);
  55     }
  56   unlink (buf);
  57
  58   for (i = 0; i < array_length (locs); ++i)
  59     {
  60       FILE *fp;
  61       struct stat st;
  62       int fd2;
  63
  64       setlocale (LC_ALL, locs[i]);
  65
  66       memset (large, '\1', sizeof (large));
  67       large[sizeof (large) - 1] = '\0';
  68
  69       fd2 = dup (fd);
  70       if (fd2 == -1)
  71         {
  72           printf ("cannot dup for locale %s: %m\n",
  73                   setlocale (LC_ALL, NULL));
  74           exit (1);
  75         }
  76
  77       if (ftruncate (fd2, 0) != 0)
  78         {
  79           printf ("cannot truncate file for locale %s: %m\n",
  80                   setlocale (LC_ALL, NULL));
  81           exit (1);
  82         }
  83
  84       fp = fdopen (fd2, "a");
  85       if (fp == NULL)
  86         {
  87           printf ("cannot create FILE for locale %s: %m\n",
  88                   setlocale (LC_ALL, NULL));
  89           exit (1);
  90         }
  91
  92       fprintf (fp, "%s", large);
  93       fprintf (fp, "%.*s", 30000, large);
  94       large[20000] = '\0';
  95       /* We're testing a large format string here and need to generate it
  96          to avoid this source file being ridiculous.  So disable the warning
  97          about a generated format string.  */
  98       DIAG_PUSH_NEEDS_COMMENT;
  99       DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat-security");
 100       fprintf (fp, large);
 101       DIAG_POP_NEEDS_COMMENT;
 102       fprintf (fp, "%-1.300000000s", "hello");
 103
 104       if (fflush (fp) != 0 || ferror (fp) != 0 || fclose (fp) != 0)
 105         {
 106           printf ("write error for locale %s: %m\n",
 107                   setlocale (LC_ALL, NULL));
 108           exit (1);
 109         }
 110
 111       if (fstat (fd, &st) != 0)
 112         {
 113           printf ("cannot stat for locale %s: %m\n",
 114                   setlocale (LC_ALL, NULL));
 115           exit (1);
 116         }
 117       else if (st.st_size != 50000 + 30000 + 19999 + 5)
 118         {
 119           printf ("file size incorrect for locale %s: %jd instead of %jd\n",
 120                   setlocale (LC_ALL, NULL),
 121                   (intmax_t) st.st_size,
 122                   (intmax_t) 50000 + 30000 + 19999 + 5);
 123           res = 1;
 124         }
 125       else
 126         printf ("locale %s OK\n", setlocale (LC_ALL, NULL));
 127     }
 128
 129   close (fd);
 130
 131   return res;
 132 }
 133
 134 #define TEST_FUNCTION do_test ()
 135 #include "../test-skeleton.c"