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/* strerror.c --- ANSI C compatible system error routine
Copyright (C) 1986, 1988, 1989, 1991, 2002, 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#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];
}
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