pcstart.c

来自「早期freebsd实现」· C语言 代码 · 共 133 行

/*-
 * Copyright (c) 1979, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)PCSTART.c	8.1 (Berkeley) 6/6/93";
#endif /* not lint */

#include <signal.h>
#include "h00vars.h"
#include "libpc.h"

/*
 * program variables
 */
struct display	_disply[MAXLVL];
int		_argc;
char		**_argv;
long		_stlim = 500000;
long		_stcnt = 0;
long		_seed = 1;
#ifdef ADDR32
char		*_minptr = (char *)0x7fffffff;
#endif ADDR32
#ifdef ADDR16
char		*_minptr = (char *)0xffff;
#endif ADDR16
char		*_maxptr = (char *)0;

/*
 * file record variables
 */
long		_filefre = PREDEF;
struct iorechd	_fchain = {
	0, 0, 0, 0,		/* only use fchain field */
	INPUT			/* fchain  */
};
struct iorec	*_actfile[MAXFILES] = {
	INPUT,
	OUTPUT,
	ERR
};

/*
 * standard files
 */
char		_inwin, _outwin, _errwin;
struct iorechd	input = {
	&_inwin,		/* fileptr */
	0,			/* lcount  */
	0x7fffffff,		/* llimit  */
	stdin,			/* fbuf    */
	OUTPUT,			/* fchain  */
	STDLVL,			/* flev    */
	"standard input",	/* pfname  */
	FTEXT|FREAD|SYNC|EOLN,	/* funit   */
	0,			/* fblk    */
	1			/* fsize   */
};
struct iorechd	output = {
	&_outwin,		/* fileptr */
	0,			/* lcount  */
	0x7fffffff,		/* llimit  */
	stdout,			/* fbuf    */
	ERR,			/* fchain  */
	STDLVL,			/* flev    */
	"standard output",	/* pfname  */
	FTEXT | FWRITE | EOFF,	/* funit   */
	1,			/* fblk    */
	1			/* fsize   */
};
struct iorechd	_err = {
	&_errwin,		/* fileptr */
	0,			/* lcount  */
	0x7fffffff,		/* llimit  */
	stderr,			/* fbuf    */
	FILNIL,			/* fchain  */
	STDLVL,			/* flev    */
	"Message file",		/* pfname  */
	FTEXT | FWRITE | EOFF,	/* funit   */
	2,			/* fblk    */
	1			/* fsize   */
};

PCSTART(mode)
	int mode;
{
	/*
	 * necessary only on systems which do not initialize
	 * memory to zero
	 */

	struct iorec	**ip;

	/*
	 * if running with runtime tests enabled, give more
	 * coherent error messages for FPEs
	 */
	if (mode) {
		signal(SIGFPE, EXCEPT);
	}
	for (ip = &_actfile[3]; ip < &_actfile[MAXFILES]; *ip++ = FILNIL);
}