1 /* $NetBSD: getservent_r.c,v 1.5 2005/04/18 19:39:45 kleink 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 1.5 2005/04/18 19:39:45 kleink 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 #include "servent.h" 49 50 #ifdef __weak_alias 51 __weak_alias(endservent_r,_endservent_r) 52 __weak_alias(getservent_r,_getservent_r) 53 __weak_alias(setservent_r,_setservent_r) 54 #endif 55 56 void 57 setservent_r(int f, struct servent_data *sd) 58 { 59 if (sd->fp == NULL) 60 sd->fp = fopen(_PATH_SERVICES, "r"); 61 else 62 rewind(sd->fp); 63 sd->stayopen |= f; 64 } 65 66 void 67 endservent_r(struct servent_data *sd) 68 { 69 if (sd->fp) { 70 (void)fclose(sd->fp); 71 sd->fp = NULL; 72 } 73 if (sd->aliases) { 74 free(sd->aliases); 75 sd->aliases = NULL; 76 sd->maxaliases = 0; 77 } 78 if (sd->line) { 79 free(sd->line); 80 sd->line = NULL; 81 } 82 sd->stayopen = 0; 83 } 84 85 struct servent * 86 getservent_r(struct servent *sp, struct servent_data *sd) 87 { 88 char *p, *cp, **q; 89 size_t i = 0; 90 int oerrno; 91 92 if (sd->fp == NULL && (sd->fp = fopen(_PATH_SERVICES, "r")) == NULL) 93 return NULL; 94 95 for (;;) { 96 if (sd->line) 97 free(sd->line); 98 sd->line = fparseln(sd->fp, NULL, NULL, NULL, 99 FPARSELN_UNESCALL); 100 if (sd->line == NULL) 101 return NULL; 102 sp->s_name = p = sd->line; 103 p = strpbrk(p, " \t"); 104 if (p == NULL) 105 continue; 106 *p++ = '\0'; 107 while (*p == ' ' || *p == '\t') 108 p++; 109 cp = strpbrk(p, ",/"); 110 if (cp == NULL) 111 continue; 112 *cp++ = '\0'; 113 sp->s_port = htons((u_short)atoi(p)); 114 sp->s_proto = cp; 115 if (sd->aliases == NULL) { 116 sd->maxaliases = 10; 117 sd->aliases = malloc(sd->maxaliases * sizeof(char *)); 118 if (sd->aliases == NULL) { 119 oerrno = errno; 120 endservent_r(sd); 121 errno = oerrno; 122 return NULL; 123 } 124 } 125 q = sp->s_aliases = sd->aliases; 126 cp = strpbrk(cp, " \t"); 127 if (cp != NULL) 128 *cp++ = '\0'; 129 while (cp && *cp) { 130 if (*cp == ' ' || *cp == '\t') { 131 cp++; 132 continue; 133 } 134 if (i == sd->maxaliases - 2) { 135 sd->maxaliases *= 2; 136 q = realloc(q, 137 sd->maxaliases * sizeof(char *)); 138 if (q == NULL) { 139 oerrno = errno; 140 endservent_r(sd); 141 errno = oerrno; 142 return NULL; 143 } 144 sp->s_aliases = sd->aliases = q; 145 } 146 q[i++] = cp; 147 cp = strpbrk(cp, " \t"); 148 if (cp != NULL) 149 *cp++ = '\0'; 150 } 151 q[i] = NULL; 152 return sp; 153 } 154 } 155