OpenSolaris_b135/cmd/mail/doopen.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/


#pragma ident	"%Z%%M%	%I%	%E% SMI" 	/* SVr4.0 2.	*/
#include "mail.h"
/*
	Generic open routine.
	Exits on error with passed error value.
	Returns file pointer on success.

	Note: This should be used only for critical files
	as it will terminate mail(1) on failure.
*/
FILE *
doopen(file, type, errnum)
char	*type, *file;
{
	static char pn[] = "doopen";
	FILE *fptr;
	struct stat st;

	if ((stat(file, &st) < 0 && errno == EOVERFLOW) ||
		(fptr = fopen(file, type)) == NULL) {
		fprintf(stderr,
			"%s: Can't open '%s' type: %s\n",program,file,type);
		error = errnum;
		sav_errno = errno;
		Dout(pn, 0, "can't open '%s' type: %s\n",program,file,type);
		Dout(pn, 0, "error set to %d\n", error);
		done(0);
	}
	return(fptr);
}