/* $NetBSD: strerror.c,v 1.1.1.1 2016/01/14 00:11:29 christos Exp $ */ /* 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 #endif #include /* Don't include , 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]; }