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 "namespace.h" 42 #include <netdb.h> 43 #include <stdio.h> 44 #include <errno.h> 45 #include <stdlib.h> 46 #include <string.h> 47 48 #include "protoent.h" 49 50 #ifdef __weak_alias 51 __weak_alias(endprotoent_r,_endprotoent_r) 52 __weak_alias(getprotoent_r,_getprotoent_r) 53 __weak_alias(setprotoent_r,_setprotoent_r) 54 #endif 55 56 void 57 setprotoent_r(int f, struct protoent_data *pd) 58 { 59 if (pd->fp == NULL) 60 pd->fp = fopen(_PATH_PROTOCOLS, "re"); 61 else 62 rewind(pd->fp); 63 pd->stayopen |= f; 64 } 65 66 void 67 endprotoent_r(struct protoent_data *pd) 68 { 69 if (pd->fp) { 70 (void)fclose(pd->fp); 71 pd->fp = NULL; 72 } 73 if (pd->aliases) { 74 free(pd->aliases); 75 pd->aliases = NULL; 76 pd->maxaliases = 0; 77 } 78 if (pd->line) { 79 free(pd->line); 80 pd->line = NULL; 81 } 82 pd->stayopen = 0; 83 } 84 85 struct protoent * 86 getprotoent_r(struct protoent *pr, struct protoent_data *pd) 87 { 88 char *p, *cp, **q; 89 size_t i = 0; 90 int oerrno; 91 92 if (pd->fp == NULL && (pd->fp = fopen(_PATH_PROTOCOLS, "re")) == NULL) 93 return NULL; 94 95 for (;;) { 96 if (pd->line) 97 free(pd->line); 98 pd->line = fparseln(pd->fp, NULL, NULL, NULL, 99 FPARSELN_UNESCALL); 100 if (pd->line == NULL) 101 return NULL; 102 pr->p_name = p = pd->line; 103 cp = strpbrk(p, " \t"); 104 if (cp == NULL) 105 continue; 106 *cp++ = '\0'; 107 while (*cp == ' ' || *cp == '\t') 108 cp++; 109 p = strpbrk(cp, " \t"); 110 if (p != NULL) 111 *p++ = '\0'; 112 pr->p_proto = atoi(cp); 113 if (pd->aliases == NULL) { 114 pd->maxaliases = 10; 115 pd->aliases = malloc(pd->maxaliases * sizeof(char *)); 116 if (pd->aliases == NULL) { 117 oerrno = errno; 118 endprotoent_r(pd); 119 errno = oerrno; 120 return NULL; 121 } 122 } 123 q = pr->p_aliases = pd->aliases; 124 if (p != NULL) { 125 cp = p; 126 while (cp && *cp) { 127 if (*cp == ' ' || *cp == '\t') { 128 cp++; 129 continue; 130 } 131 if (i == pd->maxaliases - 2) { 132 pd->maxaliases *= 2; 133 q = realloc(q, 134 pd->maxaliases * sizeof(char *)); 135 if (q == NULL) { 136 oerrno = errno; 137 endprotoent_r(pd); 138 errno = oerrno; 139 return NULL; 140 } 141 pr->p_aliases = pd->aliases = q; 142 } 143 q[i++] = cp; 144 145 cp = strpbrk(cp, " \t"); 146 if (cp != NULL) 147 *cp++ = '\0'; 148 } 149 } 150 q[i] = NULL; 151 return pr; 152 } 153 } 154