strerror.c

inetutils的源代码

/* strerror.c --- ANSI C compatible system error routine

   Copyright (C) 1986, 1988, 1989, 1991, 2002 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 0
# include <stdio.h>
#endif

extern int sys_nerr;
extern char *sys_errlist[];

char *
strerror(n)
int n;
{
	static char mesg[30];

	if (n < 0 || n >= sys_nerr) {
		sprintf(mesg, "Unknown error (%d)", n);
		return mesg;
	} else
		return sys_errlist[n];
}