1 /* $NetBSD: getservent_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[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: getservent_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 <errno.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include <stdlib.h> 47 48 #ifdef __weak_alias 49 __weak_alias(endservent_r,_endservent_r) 50 __weak_alias(getservent_r,_getservent_r) 51 __weak_alias(setservent_r,_setservent_r) 52 #endif 53 54 void 55 setservent_r(int f, struct servent_data *sd) 56 { 57 if (sd->fp == NULL) 58 sd->fp = fopen(_PATH_SERVICES, "r"); 59 else 60 rewind(sd->fp); 61 sd->stayopen |= f; 62 } 63 64 void 65 endservent_r(struct servent_data *sd) 66 { 67 if (sd->fp) { 68 (void)fclose(sd->fp); 69 sd->fp = NULL; 70 } 71 if (sd->aliases) { 72 free(sd->aliases); 73 sd->aliases = NULL; 74 sd->maxaliases = 0; 75 } 76 if (sd->line) { 77 free(sd->line); 78 sd->line = NULL; 79 } 80 sd->stayopen = 0; 81 } 82 83 struct servent * 84 getservent_r(struct servent *sp, struct servent_data *sd) 85 { 86 char *p, *cp, **q; 87 size_t i = 0; 88 int oerrno; 89 90 if (sd->fp == NULL && (sd->fp = fopen(_PATH_SERVICES, "r")) == NULL) 91 return NULL; 92 93 for (;;) { 94 if (sd->line) 95 free(sd->line); 96 sd->line = fparseln(sd->fp, NULL, NULL, NULL, 97 FPARSELN_UNESCALL); 98 if (sd->line == NULL) 99 return NULL; 100 sp->s_name = p = sd->line; 101 p = strpbrk(p, " \t"); 102 if (p == NULL) 103 continue; 104 *p++ = '\0'; 105 while (*p == ' ' || *p == '\t') 106 p++; 107 cp = strpbrk(p, ",/"); 108 if (cp == NULL) 109 continue; 110 *cp++ = '\0'; 111 sp->s_port = htons((u_short)atoi(p)); 112 sp->s_proto = cp; 113 if (sd->aliases == NULL) { 114 sd->maxaliases = 10; 115 sd->aliases = malloc(sd->maxaliases * sizeof(char *)); 116 if (sd->aliases == NULL) { 117 oerrno = errno; 118 endservent_r(sd); 119 errno = oerrno; 120 return NULL; 121 } 122 } 123 q = sp->s_aliases = sd->aliases; 124 cp = strpbrk(cp, " \t"); 125 if (cp != NULL) 126 *cp++ = '\0'; 127 while (cp && *cp) { 128 if (*cp == ' ' || *cp == '\t') { 129 cp++; 130 continue; 131 } 132 if (i == sd->maxaliases - 2) { 133 sd->maxaliases *= 2; 134 q = realloc(q, 135 sd->maxaliases * sizeof(char *)); 136 if (q == NULL) { 137 oerrno = errno; 138 endservent_r(sd); 139 errno = oerrno; 140 return NULL; 141 } 142 sp->s_aliases = sd->aliases = q; 143 } 144 q[i++] = cp; 145 cp = strpbrk(cp, " \t"); 146 if (cp != NULL) 147 *cp++ = '\0'; 148 } 149 q[i] = NULL; 150 return sp; 151 } 152 } 153