/* ** $Id: error.c,v 1.7 2003/09/04 03:46:47 weiym Exp $**** error.c: error handling functions**** Copyright (C) 2003, Feynman Software.** Copyright (C) 2000 ~ 2002 Wei Yongming.**** Some code come from APUE by Richard Stevens.**** Current maintainer: Wei Yongming.**** Create date: 2000/12/31*//*** 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 of the License, 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*//*** TODO:*/ #include	<errno.h>		/* for definition of errno */#include	<stdarg.h>		/* ANSI C header file */#include	"ourhdr.h"static void	err_doit(int, const char *, va_list);/* Nonfatal error related to a system call. * Print a message and return. */voiderr_ret(const char *fmt, ...){	va_list		ap;	va_start(ap, fmt);	err_doit(1, fmt, ap);	va_end(ap);	return;}/* Fatal error related to a system call. * Print a message and terminate. */voiderr_sys(const char *fmt, ...){	va_list		ap;	va_start(ap, fmt);	err_doit(1, fmt, ap);	va_end(ap);	exit(1);}/* Fatal error related to a system call. * Print a message, dump core, and terminate. */voiderr_dump(const char *fmt, ...){	va_list		ap;	va_start(ap, fmt);	err_doit(1, fmt, ap);	va_end(ap);	abort();		/* dump core and terminate */	exit(1);		/* shouldn't get here */}/* Nonfatal error unrelated to a system call. * Print a message and return. */voiderr_msg(const char *fmt, ...){	va_list		ap;	va_start(ap, fmt);	err_doit(0, fmt, ap);	va_end(ap);	return;}/* Fatal error unrelated to a system call. * Print a message and terminate. */voiderr_quit(const char *fmt, ...){	va_list		ap;	va_start(ap, fmt);	err_doit(0, fmt, ap);	va_end(ap);	exit(1);}/* Print a message and return to caller. * Caller specifies "errnoflag". */static voiderr_doit(int errnoflag, const char *fmt, va_list ap){	int		errno_save;	char	buf[MAXLINE];	errno_save = errno;		/* value caller might want printed */	vsprintf(buf, fmt, ap);	if (errnoflag)		sprintf(buf+strlen(buf), ": %s", strerror(errno_save));	strcat(buf, "\n");	fflush(stdout);		/* in case stdout and stderr are the same */	fputs(buf, stderr);	fflush(NULL);		/* flushes all stdio output streams */	return;}