Line data    Source code

       1             : /* Test of strerror() function.
       2             :    Copyright (C) 2007-2020 Free Software Foundation, Inc.
       3             : 
       4             :    This program is free software; you can redistribute it and/or modify
       5             :    it under the terms of the GNU General Public License as published by
       6             :    the Free Software Foundation; either version 3, or (at your option)
       7             :    any later version.
       8             : 
       9             :    This program is distributed in the hope that it will be useful,
      10             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12             :    GNU General Public License for more details.
      13             : 
      14             :    You should have received a copy of the GNU General Public License
      15             :    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
      16             : 
      17             : /* Written by Eric Blake <ebb9@byu.net>, 2007.  */
      18             : 
      19             : #include <config.h>
      20             : 
      21             : #include <string.h>
      22             : 
      23             : #include "signature.h"
      24             : SIGNATURE_CHECK (strerror, char *, (int));
      25             : 
      26             : #include <errno.h>
      27             : 
      28             : #include "macros.h"
      29             : 
      30             : int
      31           1 : main (void)
      32             : {
      33             :   char *str;
      34             : 
      35           1 :   errno = 0;
      36           1 :   str = strerror (EACCES);
      37           1 :   ASSERT (str);
      38           1 :   ASSERT (*str);
      39           1 :   ASSERT (errno == 0);
      40             : 
      41           1 :   errno = 0;
      42           1 :   str = strerror (ETIMEDOUT);
      43           1 :   ASSERT (str);
      44           1 :   ASSERT (*str);
      45           1 :   ASSERT (errno == 0);
      46             : 
      47           1 :   errno = 0;
      48           1 :   str = strerror (EOVERFLOW);
      49           1 :   ASSERT (str);
      50           1 :   ASSERT (*str);
      51           1 :   ASSERT (errno == 0);
      52             : 
      53             :   /* POSIX requires strerror (0) to succeed.  Reject use of "Unknown
      54             :      error", but allow "Success", "No error", or even Solaris' "Error
      55             :      0" which are distinct patterns from true out-of-range strings.
      56             :      http://austingroupbugs.net/view.php?id=382  */
      57           1 :   errno = 0;
      58           1 :   str = strerror (0);
      59           1 :   ASSERT (str);
      60           1 :   ASSERT (*str);
      61           1 :   ASSERT (errno == 0);
      62           1 :   ASSERT (strstr (str, "nknown") == NULL);
      63           1 :   ASSERT (strstr (str, "ndefined") == NULL);
      64             : 
      65             :   /* POSIX requires strerror to produce a non-NULL result for all
      66             :      inputs; as an extension, we also guarantee a non-empty result.
      67             :      Reporting EINVAL is optional.  */
      68           1 :   errno = 0;
      69           1 :   str = strerror (-3);
      70           1 :   ASSERT (str);
      71           1 :   ASSERT (*str);
      72           1 :   ASSERT (errno == 0 || errno == EINVAL);
      73             : 
      74           1 :   return 0;
      75             : }