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 <limits.h> 43 #include <netdb.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include "namespace.h" 48 #include "reentrant.h" 49 #include "un-namespace.h" 50 #include "netdb_private.h" 51 52 static struct protodata protodata; 53 static thread_key_t protodata_key; 54 static once_t protodata_init_once = ONCE_INITIALIZER; 55 static int protodata_thr_keycreated = 0; 56 57 static void 58 protoent_data_clear(struct protoent_data *ped) 59 { 60 if (ped->fp) { 61 fclose(ped->fp); 62 ped->fp = NULL; 63 } 64 } 65 66 static void 67 protodata_free(void *ptr) 68 { 69 struct protodata *pd = ptr; 70 71 if (pd == NULL) 72 return; 73 protoent_data_clear(&pd->data); 74 free(pd); 75 } 76 77 static void 78 protodata_keycreate(void) 79 { 80 protodata_thr_keycreated = 81 (thr_keycreate(&protodata_key, protodata_free) == 0); 82 } 83 84 struct protodata * 85 __protodata_init(void) 86 { 87 struct protodata *pd; 88 89 if (thr_main() != 0) 90 return (&protodata); 91 if (thr_once(&protodata_init_once, protodata_keycreate) != 0 || 92 !protodata_thr_keycreated) 93 return (NULL); 94 if ((pd = thr_getspecific(protodata_key)) != NULL) 95 return (pd); 96 if ((pd = calloc(1, sizeof(*pd))) == NULL) 97 return (NULL); 98 if (thr_setspecific(protodata_key, pd) == 0) 99 return (pd); 100 free(pd); 101 return (NULL); 102 } 103 104 void 105 setprotoent_r(int f, struct protoent_data *ped) 106 { 107 if (ped->fp == NULL) 108 ped->fp = fopen(_PATH_PROTOCOLS, "r"); 109 else 110 rewind(ped->fp); 111 ped->stayopen |= f; 112 } 113 114 void 115 endprotoent_r(struct protoent_data *ped) 116 { 117 if (ped->fp) { 118 fclose(ped->fp); 119 ped->fp = NULL; 120 } 121 ped->stayopen = 0; 122 } 123 124 int 125 getprotoent_r(struct protoent *pe, struct protoent_data *ped) 126 { 127 char *p; 128 char *cp, **q, *endp; 129 long l; 130 131 if (ped->fp == NULL && (ped->fp = fopen(_PATH_PROTOCOLS, "r")) == NULL) 132 return (-1); 133 again: 134 if ((p = fgets(ped->line, sizeof ped->line, ped->fp)) == NULL) 135 return (-1); 136 if (*p == '#') 137 goto again; 138 cp = strpbrk(p, "#\n"); 139 if (cp != NULL) 140 *cp = '\0'; 141 pe->p_name = p; 142 cp = strpbrk(p, " \t"); 143 if (cp == NULL) 144 goto again; 145 *cp++ = '\0'; 146 while (*cp == ' ' || *cp == '\t') 147 cp++; 148 p = strpbrk(cp, " \t"); 149 if (p != NULL) 150 *p++ = '\0'; 151 l = strtol(cp, &endp, 10); 152 if (endp == cp || *endp != '\0' || l < 0 || l > USHRT_MAX) 153 goto again; 154 pe->p_proto = l; 155 q = pe->p_aliases = ped->aliases; 156 if (p != NULL) { 157 cp = p; 158 while (cp && *cp) { 159 if (*cp == ' ' || *cp == '\t') { 160 cp++; 161 continue; 162 } 163 if (q < &ped->aliases[_MAXALIASES - 1]) 164 *q++ = cp; 165 cp = strpbrk(cp, " \t"); 166 if (cp != NULL) 167 *cp++ = '\0'; 168 } 169 } 170 *q = NULL; 171 return (0); 172 } 173 174 void 175 setprotoent(int f) 176 { 177 struct protodata *pd; 178 179 if ((pd = __protodata_init()) == NULL) 180 return; 181 setprotoent_r(f, &pd->data); 182 } 183 184 void 185 endprotoent(void) 186 { 187 struct protodata *pd; 188 189 if ((pd = __protodata_init()) == NULL) 190 return; 191 endprotoent_r(&pd->data); 192 } 193 194 struct protoent * 195 getprotoent(void) 196 { 197 struct protodata *pd; 198 199 if ((pd = __protodata_init()) == NULL) 200 return (NULL); 201 if (getprotoent_r(&pd->proto, &pd->data) != 0) 202 return (NULL); 203 return (&pd->proto); 204 } 205