misc/tst-warn-wide.c

   1 /* Test wide output conversion for warn.
   2    Copyright (C) 2018-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <err.h>
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <support/check.h>
  25 #include <support/xmemstream.h>
  26 #include <wchar.h>
  27
  28 /* Used to trigger the large-string path in __fxprintf.  */
  29 #define PADDING \
  30   "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" \
  31   "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" \
  32   "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
  33
  34 #define LPADDING \
  35   L"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"  \
  36   "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" \
  37   "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
  38
  39
  40 static void
  41 one_test (const char *message, int error_code, const wchar_t *expected)
  42 {
  43   wchar_t *buffer = NULL;
  44   size_t length = 0;
  45   FILE *fp = open_wmemstream (&buffer, &length);
  46   TEST_VERIFY_EXIT (fp != NULL);
  47   FILE *old_stderr = stderr;
  48   stderr = fp;
  49   errno = error_code;
  50   switch (error_code)
  51     {
  52     case E2BIG:
  53       warn ("%s with padding " PADDING, message);
  54       break;
  55     case EAGAIN:
  56       warn ("%s", message);
  57       break;
  58     case -1:
  59       warnx ("%s", message);
  60       break;
  61     case -2:
  62       warnx ("%s with padding " PADDING, message);
  63       break;
  64     }
  65   stderr = old_stderr;
  66   TEST_VERIFY_EXIT (!ferror (fp));
  67   TEST_COMPARE (fclose (fp), 0);
  68   if (wcscmp (buffer, expected) != 0)
  69     FAIL_EXIT1 ("unexpected output: %ls", buffer);
  70   free (buffer);
  71 }
  72
  73 static int
  74 do_test (void)
  75 {
  76   one_test ("no errno", -1,
  77             L"tst-warn-wide: no errno\n");
  78   one_test ("no errno", -2,
  79             L"tst-warn-wide: no errno with padding " PADDING "\n");
  80   one_test ("with errno", EAGAIN,
  81             L"tst-warn-wide: with errno: Resource temporarily unavailable\n");
  82   one_test ("with errno", E2BIG,
  83             L"tst-warn-wide: with errno with padding " PADDING
  84             ": Argument list too long\n");
  85   return 0;
  86 }
  87
  88 #include <support/test-driver.c>