1 /* $NetBSD: getservbyname_r.c,v 1.6 2007/03/21 02:35:39 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)getservbyname.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: getservbyname_r.c,v 1.6 2007/03/21 02:35:39 christos Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <assert.h> 43 #include <netdb.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <db.h> 47 48 #include "servent.h" 49 50 #ifdef __weak_alias 51 __weak_alias(getservbyname_r,_getservbyname_r) 52 #endif 53 54 static struct servent * 55 _servent_getbyname(struct servent_data *sd, struct servent *sp, 56 const char *name, const char *proto) 57 { 58 if (sd->db == NULL) 59 return NULL; 60 61 if (sd->flags & _SV_DB) { 62 char buf[BUFSIZ]; 63 DBT key, data; 64 DB *db = sd->db; 65 key.data = buf; 66 67 if (proto == NULL) 68 key.size = snprintf(buf, sizeof(buf), "\376%s", name); 69 else 70 key.size = snprintf(buf, sizeof(buf), "\376%s/%s", 71 name, proto); 72 key.size++; 73 74 if ((*db->get)(db, &key, &data, 0) != 0) 75 return NULL; 76 77 if ((*db->get)(db, &data, &key, 0) != 0) 78 return NULL; 79 80 if (sd->line) 81 free(sd->line); 82 83 sd->line = strdup(key.data); 84 return _servent_parseline(sd, sp); 85 } else { 86 while (_servent_getline(sd) != -1) { 87 char **cp; 88 if (_servent_parseline(sd, sp) == NULL) 89 continue; 90 91 if (strcmp(name, sp->s_name) == 0) 92 goto gotname; 93 94 for (cp = sp->s_aliases; *cp; cp++) 95 if (strcmp(name, *cp) == 0) 96 goto gotname; 97 continue; 98 gotname: 99 if (proto == NULL || strcmp(sp->s_proto, proto) == 0) 100 return sp; 101 } 102 return NULL; 103 } 104 } 105 106 struct servent * 107 getservbyname_r(const char *name, const char *proto, struct servent *sp, 108 struct servent_data *sd) 109 { 110 _DIAGASSERT(name != NULL); 111 /* proto may be NULL */ 112 113 setservent_r(sd->flags & _SV_STAYOPEN, sd); 114 sp = _servent_getbyname(sd, sp, name, proto); 115 if (!(sd->flags & _SV_STAYOPEN)) 116 _servent_close(sd); 117 return sp; 118 } 119