gl/strerror.c

   1 /* strerror.c --- POSIX compatible system error routine
   2
   3    Copyright (C) 2007 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 #include <string.h>
  21
  22 #if REPLACE_STRERROR
  23
  24 # include <stdio.h>
  25
  26 # include "intprops.h"
  27
  28 # undef strerror
  29 # if ! HAVE_DECL_STRERROR
  30 #  define strerror(n) NULL
  31 # endif
  32
  33 char *
  34 rpl_strerror (int n)
  35 {
  36   char *result = strerror (n);
  37
  38   if (result == NULL || result[0] == '\0')
  39     {
  40       static char const fmt[] = "Unknown error (%d)";
  41       static char mesg[sizeof fmt + INT_STRLEN_BOUND (n)];
  42       sprintf (mesg, fmt, n);
  43       return mesg;
  44     }
  45
  46   return result;
  47 }
  48
  49 #endif