1  /* Test the %m, %#m printf specifiers via asprintf.
       2     Copyright (C) 2021-2023 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  #ifdef __GNU__
      52    TEST_COMPARE (sprintf (buf, "%m"), 39);
      53    TEST_COMPARE_STRING (buf, "Error in unknown error system: FFFFFFFF");
      54  #else
      55    TEST_COMPARE (sprintf (buf, "%m"), 16);
      56    TEST_COMPARE_STRING (buf, "Unknown error -1");
      57  #endif
      58  
      59    errno = -1;
      60    TEST_COMPARE (sprintf (buf, "%#m"), 2);
      61    TEST_COMPARE_STRING (buf, "-1");
      62  
      63    errno = 1002003;
      64  #ifdef __GNU__
      65    TEST_COMPARE (sprintf (buf, "%m"), 42);
      66    TEST_COMPARE_STRING (buf, "(system kern) error with unknown subsystem");
      67  #else
      68    TEST_COMPARE (sprintf (buf, "%m"), 21);
      69    TEST_COMPARE_STRING (buf, "Unknown error 1002003");
      70  #endif
      71  
      72    errno = 1002003;
      73    TEST_COMPARE (sprintf (buf, "%#m"), 7);
      74    TEST_COMPARE_STRING (buf, "1002003");
      75  
      76    errno = EINVAL;
      77    TEST_COMPARE (sprintf (buf, "%20m"), 20);
      78    TEST_COMPARE_STRING (buf, "    Invalid argument");
      79  
      80    errno = EINVAL;
      81    TEST_COMPARE (sprintf (buf, "%#20m"), 20);
      82    TEST_COMPARE_STRING (buf, "              EINVAL");
      83  
      84    errno = EINVAL;
      85    TEST_COMPARE (sprintf (buf, "%-20m"), 20);
      86    TEST_COMPARE_STRING (buf, "Invalid argument    ");
      87  
      88    errno = EINVAL;
      89    TEST_COMPARE (sprintf (buf, "%-#20m"), 20);
      90    TEST_COMPARE_STRING (buf, "EINVAL              ");
      91  
      92    errno = 0;
      93    TEST_COMPARE (sprintf (buf, "%-20m"), 20);
      94    TEST_COMPARE_STRING (buf, "Success             ");
      95  
      96    errno = 0;
      97    TEST_COMPARE (sprintf (buf, "%-#20m"), 20);
      98    TEST_COMPARE_STRING (buf, "0                   ");
      99  
     100    return 0;
     101  }
     102  
     103  #include <support/test-driver.c>