xref: /illumos-gate/usr/src/cmd/lp/lib/class/getclass.c (revision 0a44ef6d)
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 *
getclass(char * name)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 }
125