error.c

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C语言 代码 · 共 145 行

#ifndef lint
static CHTYPE *sccsid = "@(#)error.c	4.1 (Ultrix) 7/17/90";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1986 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/*
 *
 *   Modification History:
 *
 * 003 - David Lindner Wed Jul 26 10:22:10 EDT 1989
 *	 Fixed badfilename bug
 *
 * 002 - Gary A. Gaudet, Wed Nov  9 10:24:49 EST 1988
 *	 	MIPS portability and bug fixes
 *
 * 001 - Gary Gaudet for Andy Gadsby 09-mar-88
 *	i18n version of csh
 */

/*
 * UNIX shell
 *
 * Bell Telephone Laboratories
 *
 */

#include	"defs.h"


/* ========	error handling	======== */

failed(s1, s2)
CHTYPE	*s1, *s2;
{
	prp2();			/* DJL 003 */
	prs_cntl(s1);
	if (s2)
	{
		prs(colon);
		prs(s2);
	}
	newline();
	exitsh(ERROR);
}

error(s)
CHTYPE	*s;
{
	failed(s, NIL);
}

exitsh(xno)
int	xno;
{
	/*
	 * Arrive here from `FATAL' errors
	 *  a) exit command,
	 *  b) default trap,
	 *  c) fault with no trap set.
	 *
	 * Action is to return to command level or exit.
	 */
	exitval = xno;
	flags |= eflag;
	if ((flags & (forked | errflg | ttyflg)) != ttyflg)
		done();
	else
	{
		clearup();
		restore(0);
		clear_buff();
		execbrk = breakcnt = funcnt = 0;
		longjmp(errshell, 1);
	}
}

void	/* DAG */
done()
{
	register CHTYPE	*t;

	if (t = trapcom[0])
	{
		trapcom[0] = 0;
		execexp(t, 0);
		free(t);
	}
	else
		chktrap();

	rmtemp(0);
	rmfunctmp();

#ifdef ACCT
	doacct();
#endif
	exit(exitval);
}

rmtemp(base)
struct ionod	*base;
{
	while (iotemp > base)
	{
		unlink(wtoc(iotemp->ioname));
		free(iotemp->iolink);
		iotemp = iotemp->iolst;
	}
}

rmfunctmp()
{
	while (fiotemp)
	{
		unlink(wtoc(fiotemp->ioname));
		fiotemp = fiotemp->iolst;
	}
}