1 /* strerror.c --- ANSI C compatible system error routine
3 Copyright (C) 1986, 1988, 1989, 1991, 2002, 2003, 2006, 2007 Free
4 Software Foundation, Inc.
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 char *rpl_strerror (int n)
30 static char const fmt[] = "Unknown error (%d)";
31 static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3];
33 char *result = strerror (n);
37 sprintf (mesg, fmt, n);
47 /* Don't include <stdio.h>, since it may or may not declare
48 sys_errlist and its declarations may collide with ours. Just
49 declare the stuff that we need directly. Standard hosted C89
50 implementations define strerror and they don't need this strerror
51 function, so take some liberties with the standard to cater to
52 ancient or limited freestanding implementations. */
53 int sprintf (char *, char const *, ...);
55 extern char *sys_errlist[];
60 static char const fmt[] = "Unknown error (%d)";
61 static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3];
63 if (n < 0 || n >= sys_nerr)
65 sprintf (mesg, fmt, n);
69 return sys_errlist[n];
74 /* This declaration is solely to ensure that after preprocessing
75 this file is never empty. */