usr/src/cmd/sgs/tsort/common/zfopen.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
  23 /*
  24  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 /*      Copyright (c) 1988 AT&T */
  29 /*        All Rights Reserved   */
  30
  31
  32 #pragma ident   "%Z%%M% %I%     %E% SMI"
  33
  34 /*
  35  *      fopen(3S) with error checking
  36  */
  37
  38 #include        "errmsg.h"
  39 #include        <stdio.h>
  40
  41 FILE *
  42 zfopen(int severity, char *path, char *type)
  43 {
  44         FILE    *fp;    /* file pointer */
  45
  46         if ((fp = fopen(path, type)) == NULL) {
  47                 char    *mode;
  48
  49                 if (type[1] == '+')
  50                         mode = "updating";
  51                 else
  52                         switch (type[0]) {
  53                         case 'r':
  54                                 mode = "reading";
  55                                 break;
  56                         case 'w':
  57                                 mode = "writing";
  58                                 break;
  59                         case 'a':
  60                                 mode = "appending";
  61                                 break;
  62                         default:
  63                                 mode = type;
  64                         }
  65                 _errmsg("UXzfopen1", severity,
  66                         "Cannot open file \"%s\" for %s.",
  67                         path, mode);
  68         }
  69         return (fp);
  70 }