1 /* $NetBSD: getprotoent_r.c,v 1.4 2004/02/25 06:28:10 taca 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 1.4 2004/02/25 06:28:10 taca Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <netdb.h> 43 #include <stdio.h> 44 #include <errno.h> 45 #include <stdlib.h> 46 #include <string.h> 47 48 #ifdef __weak_alias 49 __weak_alias(endprotoent_r,_endprotoent_r) 50 __weak_alias(getprotoent_r,_getprotoent_r) 51 __weak_alias(setprotoent_r,_setprotoent_r) 52 #endif 53 54 void 55 setprotoent_r(int f, struct protoent_data *pd) 56 { 57 if (pd->fp == NULL) 58 pd->fp = fopen(_PATH_PROTOCOLS, "r"); 59 else 60 rewind(pd->fp); 61 pd->stayopen |= f; 62 } 63 64 void 65 endprotoent_r(struct protoent_data *pd) 66 { 67 if (pd->fp) { 68 (void)fclose(pd->fp); 69 pd->fp = NULL; 70 } 71 if (pd->aliases) { 72 free(pd->aliases); 73 pd->aliases = NULL; 74 pd->maxaliases = 0; 75 } 76 if (pd->line) { 77 free(pd->line); 78 pd->line = NULL; 79 } 80 pd->stayopen = 0; 81 } 82 83 struct protoent * 84 getprotoent_r(struct protoent *pr, struct protoent_data *pd) 85 { 86 char *p, *cp, **q; 87 size_t i = 0; 88 int oerrno; 89 90 if (pd->fp == NULL && (pd->fp = fopen(_PATH_PROTOCOLS, "r")) == NULL) 91 return NULL; 92 93 for (;;) { 94 if (pd->line) 95 free(pd->line); 96 pd->line = fparseln(pd->fp, NULL, NULL, NULL, 97 FPARSELN_UNESCALL); 98 if (pd->line == NULL) 99 return NULL; 100 pr->p_name = p = pd->line; 101 cp = strpbrk(p, " \t"); 102 if (cp == NULL) 103 continue; 104 *cp++ = '\0'; 105 while (*cp == ' ' || *cp == '\t') 106 cp++; 107 p = strpbrk(cp, " \t"); 108 if (p != NULL) 109 *p++ = '\0'; 110 pr->p_proto = atoi(cp); 111 if (pd->aliases == NULL) { 112 pd->maxaliases = 10; 113 pd->aliases = malloc(pd->maxaliases * sizeof(char *)); 114 if (pd->aliases == NULL) { 115 oerrno = errno; 116 endprotoent_r(pd); 117 errno = oerrno; 118 return NULL; 119 } 120 } 121 q = pr->p_aliases = pd->aliases; 122 if (p != NULL) { 123 cp = p; 124 while (cp && *cp) { 125 if (*cp == ' ' || *cp == '\t') { 126 cp++; 127 continue; 128 } 129 if (i == pd->maxaliases - 2) { 130 pd->maxaliases *= 2; 131 q = realloc(q, 132 pd->maxaliases * sizeof(char *)); 133 if (q == NULL) { 134 oerrno = errno; 135 endprotoent_r(pd); 136 errno = oerrno; 137 return NULL; 138 } 139 pr->p_aliases = pd->aliases = q; 140 } 141 q[i++] = cp; 142 143 cp = strpbrk(cp, " \t"); 144 if (cp != NULL) 145 *cp++ = '\0'; 146 } 147 } 148 q[i] = NULL; 149 return pr; 150 } 151 } 152