52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/* $NetBSD: strerror.c,v 1.1.1.3 2004/07/12 23:26:57 wiz Exp $ */
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/* strerror.c --- ANSI C compatible system error routine
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Copyright (C) 1986, 1988, 1989, 1991, 2002, 2003 Free Software
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Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <limits.h>
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/* Don't include <stdio.h>, since it may or may not declare
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sys_errlist and its declarations may collide with ours. Just
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declare the stuff that we need directly. Standard hosted C89
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implementations define strerror and they don't need this strerror
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function, so take some liberties with the standard to cater to
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ancient or limited freestanding implementations. */
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int sprintf (char *, char const *, ...);
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extern int sys_nerr;
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extern char *sys_errlist[];
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char *
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strerror (int n)
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{
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static char const fmt[] = "Unknown error (%d)";
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static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3];
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if (n < 0 || n >= sys_nerr)
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{
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sprintf (mesg, fmt, n);
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return mesg;
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}
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else
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return sys_errlist[n];
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}
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