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      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
     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
     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
     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 *
     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