getrpcent.c revision 2830:5228d1267a01 
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 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 *
25 *	nis/getrpcent.c -- "nis" backend for nsswitch "rpc" database
26 */
27
28#pragma ident	"%Z%%M%	%I%	%E% SMI"
29
30#include "nis_common.h"
31#include <stdio.h>
32#include <string.h>
33#include <signal.h>
34#include <synch.h>
35#include <rpc/rpcent.h>
36#include <rpcsvc/ypclnt.h>
37#include <thread.h>
38
39static int
40check_name(args)
41	nss_XbyY_args_t		*args;
42{
43	struct rpcent		*rpc	= (struct rpcent *)args->returnval;
44	const char		*name	= args->key.name;
45	char			**aliasp;
46
47	if (rpc) {
48		if (strcmp(rpc->r_name, name) == 0) {
49			return (1);
50		}
51		for (aliasp = rpc->r_aliases;  *aliasp != 0;  aliasp++) {
52			if (strcmp(*aliasp, name) == 0) {
53				return (1);
54			}
55		}
56		return (0);
57	} else {
58		/*
59		 *  NSS2: nscd is running.
60		 */
61		return (_nss_nis_check_name_aliases(args,
62					(const char *)args->buf.buffer,
63					strlen(args->buf.buffer)));
64
65	}
66}
67
68static mutex_t	no_byname_lock	= DEFAULTMUTEX;
69static int	no_byname_map	= 0;
70
71static nss_status_t
72getbyname(be, a)
73	nis_backend_ptr_t	be;
74	void			*a;
75{
76	nss_XbyY_args_t		*argp = (nss_XbyY_args_t *)a;
77	int			no_map;
78	sigset_t		oldmask, newmask;
79
80	(void) sigfillset(&newmask);
81	(void) _thr_sigsetmask(SIG_SETMASK, &newmask, &oldmask);
82	(void) _mutex_lock(&no_byname_lock);
83	no_map = no_byname_map;
84	(void) _mutex_unlock(&no_byname_lock);
85	(void) _thr_sigsetmask(SIG_SETMASK, &oldmask, (sigset_t *)NULL);
86
87	if (no_map == 0) {
88		int		yp_status;
89		nss_status_t	res;
90
91		res = _nss_nis_lookup(be, argp, 1, "rpc.byname",
92					argp->key.name, &yp_status);
93		if (yp_status == YPERR_MAP) {
94			(void) sigfillset(&newmask);
95			_thr_sigsetmask(SIG_SETMASK, &newmask, &oldmask);
96			_mutex_lock(&no_byname_lock);
97			no_byname_map = 1;
98			_mutex_unlock(&no_byname_lock);
99			_thr_sigsetmask(SIG_SETMASK, &oldmask,
100					(sigset_t *)NULL);
101		} else /* if (res == NSS_SUCCESS) <==== */ {
102			return (res);
103		}
104	}
105
106	return (_nss_nis_XY_all(be, argp, 1, argp->key.name, check_name));
107}
108
109static nss_status_t
110getbynumber(be, a)
111	nis_backend_ptr_t	be;
112	void			*a;
113{
114	nss_XbyY_args_t		*argp = (nss_XbyY_args_t *)a;
115	char			numstr[12];
116
117	(void) sprintf(numstr, "%d", argp->key.number);
118	return (_nss_nis_lookup(be, argp, 1, "rpc.bynumber", numstr, 0));
119}
120
121static nis_backend_op_t rpc_ops[] = {
122	_nss_nis_destr,
123	_nss_nis_endent,
124	_nss_nis_setent,
125	_nss_nis_getent_netdb,
126	getbyname,
127	getbynumber
128};
129
130/*ARGSUSED*/
131nss_backend_t *
132_nss_nis_rpc_constr(dummy1, dummy2, dummy3)
133	const char	*dummy1, *dummy2, *dummy3;
134{
135	return (_nss_nis_constr(rpc_ops,
136				sizeof (rpc_ops) / sizeof (rpc_ops[0]),
137				"rpc.bynumber"));
138}
139