getnetent.c revision 1.10
1/* $NetBSD: getnetent.c,v 1.10 1997/07/20 13:33:21 mrg 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 1.10 1997/07/20 13:33:21 mrg Exp $"); 52#endif 53#endif /* LIBC_SCCS and not lint */ 54 55#include <sys/types.h> 56#include <sys/socket.h> 57#include <netinet/in.h> 58#include <arpa/inet.h> 59#include <netdb.h> 60#include <stdio.h> 61#include <string.h> 62 63#define MAXALIASES 35 64 65static FILE *netf; 66static char line[BUFSIZ+1]; 67static struct netent net; 68static char *net_aliases[MAXALIASES]; 69int _net_stayopen; 70 71void _setnetent __P((int)); 72void _endnetent __P((void)); 73 74void 75setnetent(stayopen) 76 int stayopen; 77{ 78 79 sethostent(stayopen); 80 _setnetent(stayopen); 81} 82 83void 84endnetent() 85{ 86 87 endhostent(); 88 _endnetent(); 89} 90 91void 92_setnetent(f) 93 int f; 94{ 95 96 if (netf == NULL) 97 netf = fopen(_PATH_NETWORKS, "r" ); 98 else 99 rewind(netf); 100 _net_stayopen |= f; 101} 102 103void 104_endnetent() 105{ 106 107 if (netf) { 108 fclose(netf); 109 netf = NULL; 110 } 111 _net_stayopen = 0; 112} 113 114struct netent * 115getnetent() 116{ 117 char *p; 118 register char *cp, **q; 119 120 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) 121 return (NULL); 122again: 123 p = fgets(line, sizeof line, netf); 124 if (p == NULL) 125 return (NULL); 126 if (*p == '#') 127 goto again; 128 cp = strpbrk(p, "#\n"); 129 if (cp == NULL) 130 goto again; 131 *cp = '\0'; 132 net.n_name = p; 133 cp = strpbrk(p, " \t"); 134 if (cp == NULL) 135 goto again; 136 *cp++ = '\0'; 137 while (*cp == ' ' || *cp == '\t') 138 cp++; 139 p = strpbrk(cp, " \t"); 140 if (p != NULL) 141 *p++ = '\0'; 142 net.n_net = inet_network(cp); 143 net.n_addrtype = AF_INET; 144 q = net.n_aliases = net_aliases; 145 if (p != NULL) { 146 cp = p; 147 while (cp && *cp) { 148 if (*cp == ' ' || *cp == '\t') { 149 cp++; 150 continue; 151 } 152 if (q < &net_aliases[MAXALIASES - 1]) 153 *q++ = cp; 154 cp = strpbrk(cp, " \t"); 155 if (cp != NULL) 156 *cp++ = '\0'; 157 } 158 } 159 *q = NULL; 160 return (&net); 161} 162