usr/src/lib/libsocket/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 #ifdef  NSS_INCLUDE_UNSAFE
  37
  38 /*
  39  * Don't free this, even on an endservent(), because bitter experience shows
  40  * that there's production code that does getXXXbyYYY(), then endXXXent(),
  41  * and then continues to use the pointer it got back.
  42  */
  43 static nss_XbyY_buf_t *buffer;
  44 #define GETBUF()                                                \
  45 NSS_XbyY_ALLOC(&buffer, (int)sizeof (struct servent), NSS_BUFLEN_SERVICES)
  46         /* === ?? set ENOMEM on failure?  */
  47
  48 struct servent *
  49 getservbyname(const char *nam, const char *proto)
  50 {
  51         nss_XbyY_buf_t  *b;
  52         struct servent  *res = 0;
  53
  54         if ((b = GETBUF()) != 0) {
  55                 res = getservbyname_r(nam, proto,
  56                                         b->result, b->buffer, b->buflen);
  57         }
  58         return (res);
  59 }
  60
  61 struct servent *
  62 getservbyport(int port, const char *proto)
  63 {
  64         nss_XbyY_buf_t  *b;
  65         struct servent  *res = 0;
  66
  67         if ((b = GETBUF()) != 0) {
  68                 res = getservbyport_r(port, proto,
  69                                         b->result, b->buffer, b->buflen);
  70         }
  71         return (res);
  72 }
  73
  74 struct servent *
  75 getservent(void)
  76 {
  77         nss_XbyY_buf_t  *b;
  78         struct servent  *res = 0;
  79
  80         if ((b = GETBUF()) != 0) {
  81                 res = getservent_r(b->result, b->buffer, b->buflen);
  82         }
  83         return (res);
  84 }
  85
  86 #endif  /* NSS_INCLUDE_UNSAFE */