/* $NetBSD: info_hesiod.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $ */ /* * Copyright (c) 1997-2014 Erez Zadok * Copyright (c) 1989 Jan-Simon Pendry * Copyright (c) 1989 Imperial College of Science, Technology & Medicine * Copyright (c) 1989 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry at Imperial College, London. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * * File: am-utils/amd/info_hesiod.c * */ /* * Get info from Hesiod */ #ifdef HAVE_CONFIG_H # include #endif /* HAVE_CONFIG_H */ #include #include #include #define HES_PREFIX "hesiod." #define HES_PREFLEN 7 #ifdef HAVE_HESIOD_INIT /* bsdi3 does not define this extern in any header file */ extern char **hesiod_resolve(void *context, const char *name, const char *type); extern int hesiod_init(void **context); static voidp hesiod_context; #endif /* HAVE_HESIOD_INIT */ /* forward declarations */ int amu_hesiod_init(mnt_map *m, char *map, time_t *tp); int hesiod_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp); int hesiod_isup(mnt_map *m, char *map); /* * No easy way to probe the server - check the map name begins with "hesiod." * Note: this name includes 'amu_' so as to not conflict with libhesiod's * hesiod_init() function. */ int amu_hesiod_init(mnt_map *m, char *map, time_t *tp) { dlog("amu_hesiod_init(%s)", map); *tp = 0; #ifdef HAVE_HESIOD_INIT if (!hesiod_context && hesiod_init(&hesiod_context) != 0) return ENOENT; #endif /* HAVE_HESIOD_INIT */ return NSTREQ(map, HES_PREFIX, HES_PREFLEN) ? 0 : ENOENT; } /* * Do a Hesiod nameserver call. * Modify time is ignored by Hesiod - XXX */ int hesiod_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp) { char hes_key[MAXPATHLEN]; char **rvec; #ifndef HAVE_HESIOD_INIT int error; #endif /* not HAVE_HESIOD_INIT */ dlog("hesiod_search(m=%lx, map=%s, key=%s, pval=%lx tp=%lx)", (unsigned long) m, map, key, (unsigned long) pval, (unsigned long) tp); if (key[0] == '.') return ENOENT; xsnprintf(hes_key, sizeof(hes_key), "%s.%s", key, map + HES_PREFLEN); /* * Call the resolver */ dlog("Hesiod base is: %s\n", gopt.hesiod_base); dlog("hesiod_search: hes_resolve(%s, %s)", hes_key, gopt.hesiod_base); if (amuDebug(D_INFO)) _res.options |= RES_DEBUG; #ifdef HAVE_HESIOD_INIT /* new style hesiod */ rvec = hesiod_resolve(hesiod_context, hes_key, gopt.hesiod_base); #else /* not HAVE_HESIOD_INIT */ rvec = hes_resolve(hes_key, gopt.hesiod_base); #endif /* not HAVE_HESIOD_INIT */ /* * If a reply was forthcoming then return * it (and free subsequent replies) */ if (rvec && *rvec) { if (m->cfm && (m->cfm->cfm_flags & CFM_SUN_MAP_SYNTAX)) { *pval = sun_entry2amd(key, *rvec); XFREE(*rvec); } else *pval = *rvec; while (*++rvec) XFREE(*rvec); return 0; } #ifdef HAVE_HESIOD_INIT /* new style hesiod */ return errno; #else /* not HAVE_HESIOD_INIT */ /* * Otherwise reflect the hesiod error into a Un*x error */ dlog("hesiod_search: Error: %d", hes_error()); switch (hes_error()) { case HES_ER_NOTFOUND: error = ENOENT; break; case HES_ER_CONFIG: error = EIO; break; case HES_ER_NET: error = ETIMEDOUT; break; default: error = EINVAL; break; } dlog("hesiod_search: Returning: %d", error); return error; #endif /* not HAVE_HESIOD_INIT */ } /* * Check if Hesiod is up, so we can determine if to clear the map or not. * Test it by querying for /defaults. * Returns: 0 if Hesiod is down, 1 if it is up. */ int hesiod_isup(mnt_map *m, char *map) { int error; char *val; time_t mtime; static int last_status = 1; /* assume up by default */ error = hesiod_search(m, map, "/defaults", &val, &mtime); dlog("hesiod_isup(%s): %s", map, strerror(error)); if (error != 0 && error != ENOENT) { plog(XLOG_ERROR, "hesiod_isup: error getting `/defaults' entry in map %s: %m", map); last_status = 0; return 0; /* Hesiod is down */ } if (last_status == 0) { /* if was down before */ plog(XLOG_INFO, "hesiod_isup: Hesiod came back up for map %s", map); last_status = 1; } return 1; /* Hesiod is up */ }