usr/src/cmd/mail/doopen.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"        /* SVr4.0 2.    */
  27 #include "mail.h"
  28 /*
  29         Generic open routine.
  30         Exits on error with passed error value.
  31         Returns file pointer on success.
  32
  33         Note: This should be used only for critical files
  34         as it will terminate mail(1) on failure.
  35 */
  36 FILE *
  37 doopen(file, type, errnum)
  38 char    *type, *file;
  39 {
  40         static char pn[] = "doopen";
  41         FILE *fptr;
  42         struct stat st;
  43
  44         if ((stat(file, &st) < 0 && errno == EOVERFLOW) ||
  45                 (fptr = fopen(file, type)) == NULL) {
  46                 fprintf(stderr,
  47                         "%s: Can't open '%s' type: %s\n",program,file,type);
  48                 error = errnum;
  49                 sav_errno = errno;
  50                 Dout(pn, 0, "can't open '%s' type: %s\n",program,file,type);
  51                 Dout(pn, 0, "error set to %d\n", error);
  52                 done(0);
  53         }
  54         return(fptr);
  55 }