| /* strerror.c --- ANSI C compatible system error routine |
| |
| Copyright (C) 1986, 1988-1989, 1991, 2002-2003, 2005 Free Software |
| Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software Foundation, |
| Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #if !HAVE_STRERROR |
| |
| #include <limits.h> |
| |
| /* Don't include <stdio.h>, since it may or may not declare |
| sys_errlist and its declarations may collide with ours. Just |
| declare the stuff that we need directly. Standard hosted C89 |
| implementations define strerror and they don't need this strerror |
| function, so take some liberties with the standard to cater to |
| ancient or limited freestanding implementations. */ |
| int sprintf (char *, char const *, ...); |
| extern int sys_nerr; |
| extern char *sys_errlist[]; |
| |
| char * |
| strerror (int n) |
| { |
| static char const fmt[] = "Unknown error (%d)"; |
| static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3]; |
| |
| if (n < 0 || n >= sys_nerr) |
| { |
| sprintf (mesg, fmt, n); |
| return mesg; |
| } |
| else |
| return sys_errlist[n]; |
| } |
| |
| #else |
| |
| /* This declaration is solely to ensure that after preprocessing |
| this file is never empty. */ |
| typedef int dummy; |
| |
| #endif |