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 *	files/printers_getbyname.c -- "files" backend for
23 *	nsswitch "printers" database.
24 *
25 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
26 * Use is subject to license terms.
27 */
28
29#pragma ident	"%Z%%M%	%I%	%E% SMI"
30
31static const char *printers = "/etc/printers.conf";
32
33#pragma weak _nss_files__printers_constr = _nss_files_printers_constr
34
35#include "files_common.h"
36#include <stdlib.h>
37#include <strings.h>
38#include <ctype.h>
39
40static int
41check_name(nss_XbyY_args_t *argp, const char *line, int linelen)
42{
43
44	const char	*limit, *linep;
45	const char	*keyp = argp->key.name;
46	int		klen = strlen(keyp);
47
48	linep = line;
49	limit = line + linelen;
50
51	/*
52	 * find the name in the namelist a|b|c...:
53	 */
54	while (linep+klen < limit && *linep != '|' && *linep != ':') {
55		if ((strncmp(linep, keyp, klen) == 0) &&
56		    ((*(linep + klen) == '|') || (*(linep + klen) == ':'))) {
57			return (1);
58		} else {
59			while (linep < limit && *linep != '|' && *linep != ':')
60				linep++;
61			if (linep >= limit || *linep == ':')
62				return (0);
63			if (*linep == '|')
64				linep++;
65		}
66	}
67	return (0);
68}
69
70nss_status_t
71_nss_files_XY_printer(be, args, filter, check)
72	files_backend_ptr_t	be;
73	nss_XbyY_args_t		*args;
74	const char		*filter;	/* advisory, to speed up */
75						/* string search */
76	files_XY_check_func	check;	/* NULL means one-shot, for getXXent */
77{
78	nss_status_t		res;
79	int	parsestat;
80	int (*func)();
81
82	if (filter != NULL && *filter == '\0')
83		return (NSS_NOTFOUND);
84	if (be->buf == 0 &&
85		(be->buf = malloc(be->minbuf)) == 0) {
86		return (NSS_UNAVAIL); /* really panic, malloc failed */
87	}
88
89	if (check != 0 || be->f == 0) {
90		if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) {
91			return (res);
92		}
93	}
94
95	res = NSS_NOTFOUND;
96
97	/*CONSTCOND*/
98	while (1) {
99		char		*instr	= be->buf;
100		int		linelen;
101
102		if ((linelen = _nss_files_read_line(be->f, instr,
103		    be->minbuf)) < 0) {
104			/* End of file */
105			args->returnval = 0;
106			args->returnlen = 0;
107			break;
108		}
109
110		/* begin at the first non-blank character */
111		while (isspace(*instr)) {
112			instr++;
113			linelen--;
114		}
115
116		/* comment line, skip it. */
117		if (*instr == '#')
118			continue;
119
120		/* blank line, skip it */
121		if ((*instr == '\n') || (*instr == '\0'))
122			continue;
123
124		if (filter != 0 && strstr(instr, filter) == 0) {
125			/*
126			 * Optimization:  if the entry doesn't contain the
127			 *   filter string then it can't be the entry we want,
128			 *   so don't bother looking more closely at it.
129			 */
130			continue;
131		}
132
133		args->returnval = 0;
134		args->returnlen = 0;
135
136		if (check != NULL && (*check)(args, instr, linelen) == 0)
137			continue;
138
139		func = args->str2ent;
140		parsestat = (*func)(instr, linelen, args->buf.result,
141					args->buf.buffer, args->buf.buflen);
142
143		if (parsestat == NSS_STR_PARSE_SUCCESS) {
144			args->returnval = (args->buf.result != NULL)?
145					args->buf.result : args->buf.buffer;
146			args->returnlen = linelen;
147			res = NSS_SUCCESS;
148			break;
149		} else if (parsestat == NSS_STR_PARSE_ERANGE) {
150			args->erange = 1;
151			break;
152		} else if (parsestat == NSS_STR_PARSE_PARSE)
153			continue;
154	}
155
156	/*
157	 * stayopen is set to 0 by default in order to close the opened
158	 * file.  Some applications may break if it is set to 1.
159	 */
160	if (check != 0 && !args->stayopen) {
161		(void) _nss_files_endent(be, 0);
162	}
163
164	return (res);
165}
166
167static nss_status_t
168getent(be, a)
169	files_backend_ptr_t	be;
170	void			*a;
171{
172	nss_XbyY_args_t		*argp = (nss_XbyY_args_t *)a;
173
174	return (_nss_files_XY_printer(be, argp, (const char *)0,
175					(files_XY_check_func)0));
176}
177
178static nss_status_t
179getbyname(be, a)
180	files_backend_ptr_t	be;
181	void			*a;
182{
183	nss_XbyY_args_t		*argp = (nss_XbyY_args_t *)a;
184
185	return (_nss_files_XY_printer(be, argp, argp->key.name, check_name));
186}
187
188static files_backend_op_t printers_ops[] = {
189	_nss_files_destr,
190	_nss_files_endent,
191	_nss_files_setent,
192	getent,
193	getbyname
194};
195
196/*ARGSUSED*/
197nss_backend_t *
198_nss_files_printers_constr(dummy1, dummy2, dummy3)
199	const char	*dummy1, *dummy2, *dummy3;
200{
201	return (_nss_files_constr(printers_ops,
202			sizeof (printers_ops) / sizeof (printers_ops[0]),
203			printers,
204			NSS_LINELEN_PRINTERS,
205			NULL));
206}
207