1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/types.h> 41 #include <sys/socket.h> 42 #include <netdb.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include "namespace.h" 47 #include "reentrant.h" 48 #include "un-namespace.h" 49 #include "netdb_private.h" 50 51 static struct protodata protodata; 52 static thread_key_t protodata_key; 53 static once_t protodata_init_once = ONCE_INITIALIZER; 54 static int protodata_thr_keycreated = 0; 55 56 static void 57 protoent_data_clear(struct protoent_data *ped) 58 { 59 if (ped->fp) { 60 fclose(ped->fp); 61 ped->fp = NULL; 62 } 63 } 64 65 static void 66 protodata_free(void *ptr) 67 { 68 struct protodata *pd = ptr; 69 70 if (pd == NULL) 71 return; 72 protoent_data_clear(&pd->data); 73 free(pd); 74 } 75 76 static void 77 protodata_keycreate(void) 78 { 79 protodata_thr_keycreated = 80 (thr_keycreate(&protodata_key, protodata_free) == 0); 81 } 82 83 struct protodata * 84 __protodata_init(void) 85 { 86 struct protodata *pd; 87 88 if (thr_main() != 0) 89 return (&protodata); 90 if (thr_once(&protodata_init_once, protodata_keycreate) != 0 || 91 !protodata_thr_keycreated) 92 return (NULL); 93 if ((pd = thr_getspecific(protodata_key)) != NULL) 94 return (pd); 95 if ((pd = calloc(1, sizeof(*pd))) == NULL) 96 return (NULL); 97 if (thr_setspecific(protodata_key, pd) == 0) 98 return (pd); 99 free(pd); 100 return (NULL); 101 } 102 103 void 104 setprotoent_r(int f, struct protoent_data *ped) 105 { 106 if (ped->fp == NULL) 107 ped->fp = fopen(_PATH_PROTOCOLS, "r"); 108 else 109 rewind(ped->fp); 110 ped->stayopen |= f; 111 } 112 113 void 114 endprotoent_r(struct protoent_data *ped) 115 { 116 if (ped->fp) { 117 fclose(ped->fp); 118 ped->fp = NULL; 119 } 120 ped->stayopen = 0; 121 } 122 123 int 124 getprotoent_r(struct protoent *pe, struct protoent_data *ped) 125 { 126 char *p; 127 char *cp, **q, *endp; 128 long l; 129 130 if (ped->fp == NULL && (ped->fp = fopen(_PATH_PROTOCOLS, "r")) == NULL) 131 return (-1); 132 again: 133 if ((p = fgets(ped->line, sizeof ped->line, ped->fp)) == NULL) 134 return (-1); 135 if (*p == '#') 136 goto again; 137 cp = strpbrk(p, "#\n"); 138 if (cp != NULL) 139 *cp = '\0'; 140 pe->p_name = p; 141 cp = strpbrk(p, " \t"); 142 if (cp == NULL) 143 goto again; 144 *cp++ = '\0'; 145 while (*cp == ' ' || *cp == '\t') 146 cp++; 147 p = strpbrk(cp, " \t"); 148 if (p != NULL) 149 *p++ = '\0'; 150 l = strtol(cp, &endp, 10); 151 if (endp == cp || *endp != '\0' || l < 0 || l > USHRT_MAX) 152 goto again; 153 pe->p_proto = l; 154 q = pe->p_aliases = ped->aliases; 155 if (p != NULL) { 156 cp = p; 157 while (cp && *cp) { 158 if (*cp == ' ' || *cp == '\t') { 159 cp++; 160 continue; 161 } 162 if (q < &ped->aliases[_MAXALIASES - 1]) 163 *q++ = cp; 164 cp = strpbrk(cp, " \t"); 165 if (cp != NULL) 166 *cp++ = '\0'; 167 } 168 } 169 *q = NULL; 170 return (0); 171 } 172 173 void 174 setprotoent(int f) 175 { 176 struct protodata *pd; 177 178 if ((pd = __protodata_init()) == NULL) 179 return; 180 setprotoent_r(f, &pd->data); 181 } 182 183 void 184 endprotoent(void) 185 { 186 struct protodata *pd; 187 188 if ((pd = __protodata_init()) == NULL) 189 return; 190 endprotoent_r(&pd->data); 191 } 192 193 struct protoent * 194 getprotoent(void) 195 { 196 struct protodata *pd; 197 198 if ((pd = __protodata_init()) == NULL) 199 return (NULL); 200 if (getprotoent_r(&pd->proto, &pd->data) != 0) 201 return (NULL); 202 return (&pd->proto); 203 } 204