usr/src/lib/libc/port/inet/getservent.c

   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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 #include <netdb.h>
  34 #include <nss_dbdefs.h>
  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 *
  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 *
  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 *
  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 }