getnetent.c revision 1.8
1/* $NetBSD: getnetent.c,v 1.8 1997/04/13 10:30:37 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#if defined(LIBC_SCCS) && !defined(lint) 46#if 0 47static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93"; 48static char rcsid[] = "Id: getnetent.c,v 8.3 1996/08/05 08:31:35 vixie Exp"; 49#else 50static char rcsid[] = "$NetBSD: getnetent.c,v 1.8 1997/04/13 10:30:37 mrg Exp $"; 51#endif 52#endif /* LIBC_SCCS and not lint */ 53 54#include <sys/types.h> 55#include <sys/socket.h> 56#include <netinet/in.h> 57#include <arpa/inet.h> 58#include <netdb.h> 59#include <stdio.h> 60#include <string.h> 61 62#define MAXALIASES 35 63 64static FILE *netf; 65static char line[BUFSIZ+1]; 66static struct netent net; 67static char *net_aliases[MAXALIASES]; 68int _net_stayopen; 69 70void _setnetent __P((int)); 71void _endnetent __P((void)); 72 73void 74setnetent(stayopen) 75 int stayopen; 76{ 77 78 sethostent(stayopen); 79 _setnetent(stayopen); 80} 81 82void 83endnetent() 84{ 85 86 endhostent(); 87 _endnetent(); 88} 89 90void 91_setnetent(f) 92 int f; 93{ 94 95 if (netf == NULL) 96 netf = fopen(_PATH_NETWORKS, "r" ); 97 else 98 rewind(netf); 99 _net_stayopen |= f; 100} 101 102void 103_endnetent() 104{ 105 106 if (netf) { 107 fclose(netf); 108 netf = NULL; 109 } 110 _net_stayopen = 0; 111} 112 113struct netent * 114getnetent() 115{ 116 char *p; 117 register char *cp, **q; 118 119 if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) 120 return (NULL); 121again: 122 p = fgets(line, BUFSIZ, netf); 123 if (p == NULL) 124 return (NULL); 125 if (*p == '#') 126 goto again; 127 cp = strpbrk(p, "#\n"); 128 if (cp == NULL) 129 goto again; 130 *cp = '\0'; 131 net.n_name = p; 132 cp = strpbrk(p, " \t"); 133 if (cp == NULL) 134 goto again; 135 *cp++ = '\0'; 136 while (*cp == ' ' || *cp == '\t') 137 cp++; 138 p = strpbrk(cp, " \t"); 139 if (p != NULL) 140 *p++ = '\0'; 141 net.n_net = inet_network(cp); 142 net.n_addrtype = AF_INET; 143 q = net.n_aliases = net_aliases; 144 if (p != NULL) { 145 cp = p; 146 while (cp && *cp) { 147 if (*cp == ' ' || *cp == '\t') { 148 cp++; 149 continue; 150 } 151 if (q < &net_aliases[MAXALIASES - 1]) 152 *q++ = cp; 153 cp = strpbrk(cp, " \t"); 154 if (cp != NULL) 155 *cp++ = '\0'; 156 } 157 } 158 *q = NULL; 159 return (&net); 160} 161