info_hesiod.c revision 272461
11573Srgrimes/* 211681Sbde * Copyright (c) 1997-2006 Erez Zadok 31573Srgrimes * Copyright (c) 1989 Jan-Simon Pendry 41573Srgrimes * Copyright (c) 1989 Imperial College of Science, Technology & Medicine 51573Srgrimes * Copyright (c) 1989 The Regents of the University of California. 61573Srgrimes * All rights reserved. 71573Srgrimes * 81573Srgrimes * This code is derived from software contributed to Berkeley by 91573Srgrimes * Jan-Simon Pendry at Imperial College, London. 101573Srgrimes * 111573Srgrimes * Redistribution and use in source and binary forms, with or without 121573Srgrimes * modification, are permitted provided that the following conditions 131573Srgrimes * are met: 141573Srgrimes * 1. Redistributions of source code must retain the above copyright 151573Srgrimes * notice, this list of conditions and the following disclaimer. 161573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 171573Srgrimes * notice, this list of conditions and the following disclaimer in the 181573Srgrimes * documentation and/or other materials provided with the distribution. 191573Srgrimes * 3. All advertising materials mentioning features or use of this software 201573Srgrimes * must display the following acknowledgment: 211573Srgrimes * This product includes software developed by the University of 221573Srgrimes * California, Berkeley and its contributors. 231573Srgrimes * 4. Neither the name of the University nor the names of its contributors 241573Srgrimes * may be used to endorse or promote products derived from this software 251573Srgrimes * without specific prior written permission. 261573Srgrimes * 271573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 281573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 291573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3084225Sdillon * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3184225Sdillon * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3284225Sdillon * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 331573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3428179Ssteve * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3511681Sbde * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3628179Ssteve * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 371573Srgrimes * SUCH DAMAGE. 381573Srgrimes * 391573Srgrimes * 4011681Sbde * File: am-utils/amd/info_hesiod.c 411573Srgrimes * 4211681Sbde */ 4311681Sbde 441573Srgrimes/* 4511681Sbde * Get info from Hesiod 46116344Smarkm */ 4711681Sbde 4811681Sbde#ifdef HAVE_CONFIG_H 491573Srgrimes# include <config.h> 501573Srgrimes#endif /* HAVE_CONFIG_H */ 511573Srgrimes#include <am_defs.h> 52175352Sjhb#include <amd.h> 53175352Sjhb 54154835Scognet#define HES_PREFIX "hesiod." 55154835Scognet#define HES_PREFLEN 7 56174818Sjhb 57154835Scognet#ifdef HAVE_HESIOD_INIT 58154835Scognet/* bsdi3 does not define this extern in any header file */ 59183565Sedextern char **hesiod_resolve(void *context, const char *name, const char *type); 60154835Scognetextern int hesiod_init(void **context); 61154835Scognetstatic voidp hesiod_context; 62154835Scognet#endif /* HAVE_HESIOD_INIT */ 63183565Sed 64183565Sed/* forward declarations */ 65154835Scognetint amu_hesiod_init(mnt_map *m, char *map, time_t *tp); 66183565Sedint hesiod_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp); 67183565Sedint hesiod_isup(mnt_map *m, char *map); 68183565Sed 69174818Sjhb/* 70183565Sed * No easy way to probe the server - check the map name begins with "hesiod." 71183565Sed * Note: this name includes 'amu_' so as to not conflict with libhesiod's 72174818Sjhb * hesiod_init() function. 73183565Sed */ 74183565Sedint 75174818Sjhbamu_hesiod_init(mnt_map *m, char *map, time_t *tp) 76174818Sjhb{ 77183565Sed dlog("amu_hesiod_init(%s)", map); 78183565Sed *tp = 0; 79154835Scognet 80154835Scognet#ifdef HAVE_HESIOD_INIT 81154835Scognet if (!hesiod_context && hesiod_init(&hesiod_context) != 0) 82154835Scognet return ENOENT; 83154835Scognet#endif /* HAVE_HESIOD_INIT */ 84175352Sjhb 85154835Scognet return NSTREQ(map, HES_PREFIX, HES_PREFLEN) ? 0 : ENOENT; 86154835Scognet} 87154835Scognet 88154835Scognet 89154835Scognet/* 90154835Scognet * Do a Hesiod nameserver call. 91183565Sed * Modify time is ignored by Hesiod - XXX 92183565Sed */ 93183565Sedint 94154835Scognethesiod_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp) 95154835Scognet{ 9613137Speter char hes_key[MAXPATHLEN]; 97121193Smarkm char **rvec; 981573Srgrimes#ifndef HAVE_HESIOD_INIT 991573Srgrimes int error; 1001573Srgrimes#endif /* not HAVE_HESIOD_INIT */ 1011573Srgrimes 1021573Srgrimes dlog("hesiod_search(m=%lx, map=%s, key=%s, pval=%lx tp=%lx)", 1031573Srgrimes (unsigned long) m, map, key, (unsigned long) pval, (unsigned long) tp); 1041573Srgrimes 1051573Srgrimes if (key[0] == '.') 1061573Srgrimes return ENOENT; 1078870Srgrimes 1081573Srgrimes xsnprintf(hes_key, sizeof(hes_key), "%s.%s", key, map + HES_PREFLEN); 1091573Srgrimes 1101573Srgrimes /* 1111573Srgrimes * Call the resolver 1121573Srgrimes */ 1131573Srgrimes dlog("Hesiod base is: %s\n", gopt.hesiod_base); 1141573Srgrimes dlog("hesiod_search: hes_resolve(%s, %s)", hes_key, gopt.hesiod_base); 1151573Srgrimes if (amuDebug(D_INFO)) 1161573Srgrimes _res.options |= RES_DEBUG; 1171573Srgrimes 1181573Srgrimes#ifdef HAVE_HESIOD_INIT 1191573Srgrimes /* new style hesiod */ 1201573Srgrimes rvec = hesiod_resolve(hesiod_context, hes_key, gopt.hesiod_base); 121#else /* not HAVE_HESIOD_INIT */ 122 rvec = hes_resolve(hes_key, gopt.hesiod_base); 123#endif /* not HAVE_HESIOD_INIT */ 124 125 /* 126 * If a reply was forthcoming then return 127 * it (and free subsequent replies) 128 */ 129 if (rvec && *rvec) { 130 *pval = *rvec; 131 while (*++rvec) 132 XFREE(*rvec); 133 return 0; 134 } 135 136#ifdef HAVE_HESIOD_INIT 137 /* new style hesiod */ 138 return errno; 139#else /* not HAVE_HESIOD_INIT */ 140 /* 141 * Otherwise reflect the hesiod error into a Un*x error 142 */ 143 dlog("hesiod_search: Error: %d", hes_error()); 144 switch (hes_error()) { 145 case HES_ER_NOTFOUND: 146 error = ENOENT; 147 break; 148 case HES_ER_CONFIG: 149 error = EIO; 150 break; 151 case HES_ER_NET: 152 error = ETIMEDOUT; 153 break; 154 default: 155 error = EINVAL; 156 break; 157 } 158 dlog("hesiod_search: Returning: %d", error); 159 return error; 160#endif /* not HAVE_HESIOD_INIT */ 161} 162 163 164/* 165 * Check if Hesiod is up, so we can determine if to clear the map or not. 166 * Test it by querying for /defaults. 167 * Returns: 0 if Hesiod is down, 1 if it is up. 168 */ 169int 170hesiod_isup(mnt_map *m, char *map) 171{ 172 int error; 173 char *val; 174 time_t mtime; 175 static int last_status = 1; /* assume up by default */ 176 177 error = hesiod_search(m, map, "/defaults", &val, &mtime); 178 dlog("hesiod_isup(%s): %s", map, strerror(error)); 179 if (error != 0 && error != ENOENT) { 180 plog(XLOG_ERROR, 181 "hesiod_isup: error getting `/defaults' entry in map %s: %m", map); 182 last_status = 0; 183 return 0; /* Hesiod is down */ 184 } 185 if (last_status == 0) { /* if was down before */ 186 plog(XLOG_INFO, "hesiod_isup: Hesiod came back up for map %s", map); 187 last_status = 1; 188 } 189 return 1; /* Hesiod is up */ 190} 191