getnetent.c revision 1.11
1/* $NetBSD: getnetent.c,v 1.11 1997/07/21 14:07:56 jtc 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro 36 * Dep. Matematica Universidade de Coimbra, Portugal, Europe 37 * 38 * Permission to use, copy, modify, and distribute this software for any 39 * purpose with or without fee is hereby granted, provided that the above 40 * copyright notice and this permission notice appear in all copies. 41 * 42 * from getnetent.c 1.1 (Coimbra) 93/06/02 43 */ 44 45#include <sys/cdefs.h> 46#if defined(LIBC_SCCS) && !defined(lint) 47#if 0 48static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93"; 49static char rcsid[] = "$Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp "; 50#else 51__RCSID("$NetBSD: getnetent.c,v 1.11 1997/07/21 14:07:56 jtc Exp $"); 52#endif 53#endif /* LIBC_SCCS and not lint */ 54 55#include "namespace.h" 56#include <sys/types.h> 57#include <sys/socket.h> 58#include <netinet/in.h> 59#include <arpa/inet.h> 60#include <netdb.h> 61#include <stdio.h> 62#include <string.h> 63 64#ifdef __weak_alias 65__weak_alias(endnetent,_endnetent); 66__weak_alias(getnetent,_getnetent); 67__weak_alias(setnetent,_setnetent); 68#endif 69 70#define MAXALIASES 35 71 72static FILE *netf; 73static char line[BUFSIZ+1]; 74static struct netent net; 75static char *net_aliases[MAXALIASES]; 76int _net_stayopen; 77 78static void __setnetent __P((int)); 79static void __endnetent __P((void)); 80 81void 82setnetent(stayopen) 83 int stayopen; 84{ 85 86 sethostent(stayopen); 87 __setnetent(stayopen); 88} 89 90void 91endnetent() 92{ 93 94 endhostent(); 95 __endnetent(); 96} 97 98static void 99__setnetent(f) 100 int f; 101{ 102 103 if (netf == NULL) 104 netf = fopen(_PATH_NETWORKS, "r" ); 105 else 106 rewind(netf); 107 _net_stayopen |= f; 108} 109 110static void 111__endnetent() 112{ 113 114 if (netf) { 115 fclose(netf); 116 netf = NULL; 117 } 118 _net_stayopen = 0; 119} 120 121struct netent * 122getnetent() 123{ 124 char *p; 125 register char *cp, **q; 126 127 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) 128 return (NULL); 129again: 130 p = fgets(line, sizeof line, netf); 131 if (p == NULL) 132 return (NULL); 133 if (*p == '#') 134 goto again; 135 cp = strpbrk(p, "#\n"); 136 if (cp == NULL) 137 goto again; 138 *cp = '\0'; 139 net.n_name = p; 140 cp = strpbrk(p, " \t"); 141 if (cp == NULL) 142 goto again; 143 *cp++ = '\0'; 144 while (*cp == ' ' || *cp == '\t') 145 cp++; 146 p = strpbrk(cp, " \t"); 147 if (p != NULL) 148 *p++ = '\0'; 149 net.n_net = inet_network(cp); 150 net.n_addrtype = AF_INET; 151 q = net.n_aliases = net_aliases; 152 if (p != NULL) { 153 cp = p; 154 while (cp && *cp) { 155 if (*cp == ' ' || *cp == '\t') { 156 cp++; 157 continue; 158 } 159 if (q < &net_aliases[MAXALIASES - 1]) 160 *q++ = cp; 161 cp = strpbrk(cp, " \t"); 162 if (cp != NULL) 163 *cp++ = '\0'; 164 } 165 } 166 *q = NULL; 167 return (&net); 168} 169