1 /* $NetBSD: getprotoent_r.c,v 1.6 2011/10/15 23:00:02 christos 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: getprotoent_r.c,v 1.6 2011/10/15 23:00:02 christos Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include <netdb.h> 42 #include <stdio.h> 43 #include <errno.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 #include <FindDirectory.h> 48 49 #include <libutil.h> 50 #include "protoent.h" 51 52 #ifdef __weak_alias 53 __weak_alias(endprotoent_r,_endprotoent_r) 54 __weak_alias(getprotoent_r,_getprotoent_r) 55 __weak_alias(setprotoent_r,_setprotoent_r) 56 #endif 57 58 void 59 setprotoent_r(int f, struct protoent_data *pd) 60 { 61 if (pd->fp == NULL) { 62 char buffer[256]; 63 find_directory(B_SYSTEM_DATA_DIRECTORY, 0, false, buffer, sizeof(buffer)); 64 strlcat(buffer, "/network/protocols", sizeof(buffer)); 65 66 pd->fp = fopen(buffer, "re"); 67 } else 68 rewind(pd->fp); 69 pd->stayopen |= f; 70 } 71 72 void 73 endprotoent_r(struct protoent_data *pd) 74 { 75 if (pd->fp) { 76 (void)fclose(pd->fp); 77 pd->fp = NULL; 78 } 79 if (pd->aliases) { 80 free(pd->aliases); 81 pd->aliases = NULL; 82 pd->maxaliases = 0; 83 } 84 if (pd->line) { 85 free(pd->line); 86 pd->line = NULL; 87 } 88 pd->stayopen = 0; 89 } 90 91 struct protoent * 92 getprotoent_r(struct protoent *pr, struct protoent_data *pd) 93 { 94 char *p, *cp, **q; 95 size_t i = 0; 96 int oerrno; 97 98 if (pd->fp == NULL) 99 setprotoent_r(0, pd); 100 if (pd->fp == NULL) 101 return NULL; 102 103 for (;;) { 104 if (pd->line) 105 free(pd->line); 106 pd->line = fparseln(pd->fp, NULL, NULL, NULL, 107 FPARSELN_UNESCALL); 108 if (pd->line == NULL) 109 return NULL; 110 pr->p_name = p = pd->line; 111 cp = strpbrk(p, " \t"); 112 if (cp == NULL) 113 continue; 114 *cp++ = '\0'; 115 while (*cp == ' ' || *cp == '\t') 116 cp++; 117 p = strpbrk(cp, " \t"); 118 if (p != NULL) 119 *p++ = '\0'; 120 pr->p_proto = atoi(cp); 121 if (pd->aliases == NULL) { 122 pd->maxaliases = 10; 123 pd->aliases = malloc(pd->maxaliases * sizeof(char *)); 124 if (pd->aliases == NULL) { 125 oerrno = errno; 126 endprotoent_r(pd); 127 errno = oerrno; 128 return NULL; 129 } 130 } 131 q = pr->p_aliases = pd->aliases; 132 if (p != NULL) { 133 cp = p; 134 while (cp && *cp) { 135 if (*cp == ' ' || *cp == '\t') { 136 cp++; 137 continue; 138 } 139 if (i == pd->maxaliases - 2) { 140 pd->maxaliases *= 2; 141 q = realloc(q, 142 pd->maxaliases * sizeof(char *)); 143 if (q == NULL) { 144 oerrno = errno; 145 endprotoent_r(pd); 146 errno = oerrno; 147 return NULL; 148 } 149 pr->p_aliases = pd->aliases = q; 150 } 151 q[i++] = cp; 152 153 cp = strpbrk(cp, " \t"); 154 if (cp != NULL) 155 *cp++ = '\0'; 156 } 157 } 158 q[i] = NULL; 159 return pr; 160 } 161 } 162