f77_abort.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static char	*sccsid = " @(#)f77_abort.c	4.1	(ULTRIX)	7/3/90";
#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
*
*	David Metsky		10-Jan-86
*
* 001	Added from BSD 4.3 version as part of upgrade.
*
*	Based on:	f77_abort.c	5.2	7/12/85
*
*************************************************************************/

/*
 *	all f77 aborts eventually call f77_abort.
 *	f77_abort cleans up open files and terminates with a dump if needed,
 *	with a message otherwise.	
 *
 */

#include <signal.h>
#include "fio.h"

char *getenv();
extern int errno;
int _lg_flag;	/* _lg_flag is non-zero if -lg was specified to ld */

f77_abort( err_val, act_core )
{
	char first_char, *env_var;
	int core_dump;

	env_var = getenv("f77_dump_flag");
	first_char = (env_var == NULL) ? 0 : *env_var;

	signal(SIGILL, SIG_DFL);
	sigsetmask(0);			/* don't block */

	/* see if we want a core dump:
		first line checks for signals like hangup - don't dump then.
		second line checks if -lg specified to ld (e.g. by saying
			-g to f77) and checks the f77_dump_flag var. */
	core_dump = ((nargs() != 2) || act_core) &&
	    ( (_lg_flag && (first_char != 'n')) || first_char == 'y');

	if( !core_dump )
		fprintf(units[STDERR].ufd,"*** Execution terminated\n");

	f_exit();
	_cleanup();
	if( nargs() ) errno = err_val;
	else errno = -2;   /* prior value will be meaningless,
				so set it to undefined value */

	if( core_dump ) abort();
	else  exit( errno );
}