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 * lib/libsocket/inet/getservent_r.c
26 *
27 * This file defines and implements the re-entrant enumeration routines for
28 * services: setservent(), getservent_r(), and endservent(). They consult
29 * the switch policy directly and do not "share" their enumeration state
30 * nor the stayopen flag with the implentation of the more common
31 * getservbyname_r()/getservbyport_r(). The latter follows a tortuous
32 * route in order to be consistent with netdir_getbyYY() (see
33 * getservbyname_r.c and lib/libnsl/nss/netdir_inet.c).
34 */
35
36 #pragma ident "%Z%%M% %I% %E% SMI"
37
38 #include <sys/types.h>
39 #include <nss_dbdefs.h>
40
41 /*
42 * str2servent is implemented in libnsl, libnsl/nss/netdir_inet.c, since
43 * the "engine" of the new gethost/getserv/netdir lives in libnsl.
44 */
45 int str2servent(const char *, int, void *, char *, int);
46
47 /*
48 * Unsynchronized, but it affects only
49 * efficiency, not correctness.
50 */
51 static int services_stayopen;
52 static DEFINE_NSS_DB_ROOT(db_root);
53 static DEFINE_NSS_GETENT(context);
54
55 void
_nss_initf_services(nss_db_params_t * p)56 _nss_initf_services(nss_db_params_t *p)
57 {
58 p->name = NSS_DBNAM_SERVICES;
59 p->default_config = NSS_DEFCONF_SERVICES;
60 }
61
62 int
setservent(int stay)63 setservent(int stay)
64 {
65 services_stayopen |= stay;
66 nss_setent(&db_root, _nss_initf_services, &context);
67 return (0);
68 }
69
70 int
endservent()71 endservent()
72 {
73 services_stayopen = 0;
74 nss_endent(&db_root, _nss_initf_services, &context);
75 nss_delete(&db_root);
76 return (0);
77 }
78
79 struct servent *
getservent_r(struct servent * result,char * buffer,int buflen)80 getservent_r(struct servent *result, char *buffer, int buflen)
81 {
82 nss_XbyY_args_t arg;
83 nss_status_t res;
84
85 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2servent);
86 /*
87 * Setting proto to NULL here is a bit of a hack since we share
88 * the parsing code in the NIS+ backend with our getservbyYY()
89 * brethren who can search on 1-1/2 key. If they pass a NULL
90 * proto, the parsing code deals with it by picking the protocol
91 * from the first NIS+ matching object and combining all entries
92 * with "that" proto field. NIS+ is the only name service, so far,
93 * that can return multiple entries on a lookup.
94 */
95 arg.key.serv.proto = NULL;
96 /* === No stayopen flag; of course you stay open for iteration */
97 res = nss_getent(&db_root, _nss_initf_services, &context, &arg);
98 arg.status = res;
99 return (struct servent *)NSS_XbyY_FINI(&arg);
100 }
101