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 #include <sys/types.h>
37 #include <nss_dbdefs.h>
38
39 /*
40 * str2servent is implemented in libnsl, libnsl/nss/netdir_inet.c, since
41 * the "engine" of the new gethost/getserv/netdir lives in libnsl.
42 */
43 int str2servent(const char *, int, void *, char *, int);
44
45 /*
46 * Unsynchronized, but it affects only
47 * efficiency, not correctness.
48 */
49 static int services_stayopen;
50 static DEFINE_NSS_DB_ROOT(db_root);
51 static DEFINE_NSS_GETENT(context);
52
53 void
_nss_initf_services(nss_db_params_t * p)54 _nss_initf_services(nss_db_params_t *p)
55 {
56 p->name = NSS_DBNAM_SERVICES;
57 p->default_config = NSS_DEFCONF_SERVICES;
58 }
59
60 int
setservent(int stay)61 setservent(int stay)
62 {
63 services_stayopen |= stay;
64 nss_setent(&db_root, _nss_initf_services, &context);
65 return (0);
66 }
67
68 int
endservent()69 endservent()
70 {
71 services_stayopen = 0;
72 nss_endent(&db_root, _nss_initf_services, &context);
73 nss_delete(&db_root);
74 return (0);
75 }
76
77 struct servent *
getservent_r(struct servent * result,char * buffer,int buflen)78 getservent_r(struct servent *result, char *buffer, int buflen)
79 {
80 nss_XbyY_args_t arg;
81 nss_status_t res;
82
83 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2servent);
84 /*
85 * Setting proto to NULL here is a bit of a hack since we share
86 * the parsing code in the NIS+ backend with our getservbyYY()
87 * brethren who can search on 1-1/2 key. If they pass a NULL
88 * proto, the parsing code deals with it by picking the protocol
89 * from the first NIS+ matching object and combining all entries
90 * with "that" proto field. NIS+ is the only name service, so far,
91 * that can return multiple entries on a lookup.
92 */
93 arg.key.serv.proto = NULL;
94 /* === No stayopen flag; of course you stay open for iteration */
95 res = nss_getent(&db_root, _nss_initf_services, &context, &arg);
96 arg.status = res;
97 return (struct servent *)NSS_XbyY_FINI(&arg);
98 }
99