stdio-common/tst-sprintf-errno.c

   1 /* Test the %m, %#m printf specifiers via asprintf.
   2    Copyright (C) 2021 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 <errno.h>
  20 #include <libc-diag.h>
  21 #include <stdio.h>
  22 #include <support/check.h>
  23 #include <support/support.h>
  24
  25 /* GCC does not yet know about the %#m specifier.  */
  26 DIAG_PUSH_NEEDS_COMMENT;
  27 DIAG_IGNORE_NEEDS_COMMENT (11, "-Wformat=");
  28
  29 static int
  30 do_test (void)
  31 {
  32   char buf[64];
  33
  34   errno = EINVAL;
  35   TEST_COMPARE (sprintf (buf, "%m"), 16);
  36   TEST_COMPARE_STRING (buf, "Invalid argument");
  37
  38   errno = EINVAL;
  39   TEST_COMPARE (sprintf (buf, "%#m"), 6);
  40   TEST_COMPARE_STRING (buf, "EINVAL");
  41
  42   errno = 0;
  43   TEST_COMPARE (sprintf (buf, "%m"), 7);
  44   TEST_COMPARE_STRING (buf, "Success");
  45
  46   errno = 0;
  47   TEST_COMPARE (sprintf (buf, "%#m"), 1);
  48   TEST_COMPARE_STRING (buf, "0");
  49
  50   errno = -1;
  51   TEST_COMPARE (sprintf (buf, "%m"), 16);
  52   TEST_COMPARE_STRING (buf, "Unknown error -1");
  53
  54   errno = -1;
  55   TEST_COMPARE (sprintf (buf, "%#m"), 2);
  56   TEST_COMPARE_STRING (buf, "-1");
  57
  58   errno = 1002003;
  59   TEST_COMPARE (sprintf (buf, "%m"), 21);
  60   TEST_COMPARE_STRING (buf, "Unknown error 1002003");
  61
  62   errno = 1002003;
  63   TEST_COMPARE (sprintf (buf, "%#m"), 7);
  64   TEST_COMPARE_STRING (buf, "1002003");
  65
  66   errno = EINVAL;
  67   TEST_COMPARE (sprintf (buf, "%20m"), 20);
  68   TEST_COMPARE_STRING (buf, "    Invalid argument");
  69
  70   errno = EINVAL;
  71   TEST_COMPARE (sprintf (buf, "%#20m"), 20);
  72   TEST_COMPARE_STRING (buf, "              EINVAL");
  73
  74   errno = EINVAL;
  75   TEST_COMPARE (sprintf (buf, "%-20m"), 20);
  76   TEST_COMPARE_STRING (buf, "Invalid argument    ");
  77
  78   errno = EINVAL;
  79   TEST_COMPARE (sprintf (buf, "%-#20m"), 20);
  80   TEST_COMPARE_STRING (buf, "EINVAL              ");
  81
  82   errno = 0;
  83   TEST_COMPARE (sprintf (buf, "%-20m"), 20);
  84   TEST_COMPARE_STRING (buf, "Success             ");
  85
  86   errno = 0;
  87   TEST_COMPARE (sprintf (buf, "%-#20m"), 20);
  88   TEST_COMPARE_STRING (buf, "0                   ");
  89
  90   return 0;
  91 }
  92
  93 #include <support/test-driver.c>