usr/src/cmd/lp/lib/class/getclass.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32 /* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */
  33
  34 #include "stdio.h"
  35 #include "string.h"
  36 #include "errno.h"
  37 #include "sys/types.h"
  38 #include <syslog.h>
  39
  40 #include "lp.h"
  41 #include "class.h"
  42
  43 /**
  44  ** getclass() - READ CLASS FROM TO DISK
  45  **/
  46
  47 CLASS *
  48 getclass(char *name)
  49 {
  50         static long             lastdir         = -1;
  51
  52         CLASS           *clsp;
  53
  54         char                    *file,
  55                                 buf[BUFSIZ];
  56
  57         int fd;
  58
  59         syslog(LOG_DEBUG, "getclass(%s)", name ? name : "");
  60
  61         if (!name || !*name) {
  62                 errno = EINVAL;
  63                 return (0);
  64         }
  65
  66         /*
  67          * Getting ``all''? If so, jump into the directory
  68          * wherever we left off.
  69          */
  70         if (STREQU(NAME_ALL, name)) {
  71                 if (!(name = next_file(Lp_A_Classes, &lastdir)))
  72                         return (0);
  73         } else
  74                 lastdir = -1;
  75
  76         /*
  77          * Get the class list.
  78          */
  79
  80         if (!(file = getclassfile(name)))
  81                 return (0);
  82
  83         if ((fd = open_locked(file, "r", 0)) < 0) {
  84                 Free (file);
  85                 return (0);
  86         }
  87         Free (file);
  88
  89         clsp = (CLASS *)calloc(sizeof (*clsp), 1);
  90
  91         if (!(clsp->name = Strdup(name))) {
  92                 Free (clsp);
  93                 close(fd);
  94                 errno = ENOMEM;
  95                 return (0);
  96         }
  97
  98         clsp->members = 0;
  99         errno = 0;
 100         while (fdgets(buf, BUFSIZ, fd)) {
 101                 buf[strlen(buf) - 1] = 0;
 102                 addlist (&clsp->members, buf);
 103         }
 104         if (errno != 0) {
 105                 int                     save_errno = errno;
 106
 107                 freelist (clsp->members);
 108                 Free (clsp->name);
 109                 Free (clsp);
 110                 close(fd);
 111                 errno = save_errno;
 112                 return (0);
 113         }
 114         close(fd);
 115
 116         if (!clsp->members) {
 117                 Free (clsp->name);
 118                 Free (clsp);
 119                 errno = EBADF;
 120                 return (0);
 121         }
 122
 123         return (clsp);
 124 }