xref: /illumos-gate/usr/src/lib/libsocket/inet/getservent.c (revision 1da57d551424de5a9d469760be7c4b4d4f10a755)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright (c) 1986-1994,2001 by Sun Microsystems, Inc.
24  * All rights reserved.
25  *
26  * Ye olde non-reentrant interface (MT-unsafe, caveat utor)
27  *
28  * lib/libsocket/inet/getservent.c
29  */
30 
31 #include <netdb.h>
32 #include <nss_dbdefs.h>
33 
34 #ifdef	NSS_INCLUDE_UNSAFE
35 
36 /*
37  * Don't free this, even on an endservent(), because bitter experience shows
38  * that there's production code that does getXXXbyYYY(), then endXXXent(),
39  * and then continues to use the pointer it got back.
40  */
41 static nss_XbyY_buf_t *buffer;
42 #define	GETBUF()						\
43 NSS_XbyY_ALLOC(&buffer, (int)sizeof (struct servent), NSS_BUFLEN_SERVICES)
44 	/* === ?? set ENOMEM on failure?  */
45 
46 struct servent *
getservbyname(const char * nam,const char * proto)47 getservbyname(const char *nam, const char *proto)
48 {
49 	nss_XbyY_buf_t	*b;
50 	struct servent	*res = 0;
51 
52 	if ((b = GETBUF()) != 0) {
53 		res = getservbyname_r(nam, proto,
54 					b->result, b->buffer, b->buflen);
55 	}
56 	return (res);
57 }
58 
59 struct servent *
getservbyport(int port,const char * proto)60 getservbyport(int port, const char *proto)
61 {
62 	nss_XbyY_buf_t	*b;
63 	struct servent	*res = 0;
64 
65 	if ((b = GETBUF()) != 0) {
66 		res = getservbyport_r(port, proto,
67 					b->result, b->buffer, b->buflen);
68 	}
69 	return (res);
70 }
71 
72 struct servent *
getservent(void)73 getservent(void)
74 {
75 	nss_XbyY_buf_t	*b;
76 	struct servent	*res = 0;
77 
78 	if ((b = GETBUF()) != 0) {
79 		res = getservent_r(b->result, b->buffer, b->buflen);
80 	}
81 	return (res);
82 }
83 
84 #endif	/* NSS_INCLUDE_UNSAFE */
85