dist/amd/info_hesiod.c

0 /*	$NetBSD$	*/
4  * Copyright (c) 1997-2014 Erez Zadok
5  * Copyright (c) 1989 Jan-Simon Pendry
6  * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
7  * Copyright (c) 1989 The Regents of the University of California.
8  * All rights reserved.
11  * Jan-Simon Pendry at Imperial College, London.
15  * are met:
16  * 1. Redistributions of source code must retain the above copyright
17  *    notice, this list of conditions and the following disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
20  *    documentation and/or other materials provided with the distribution.
21  * 3. Neither the name of the University nor the names of its contributors
23  *    without specific prior written permission.
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35  * SUCH DAMAGE.
38  * File: am-utils/amd/info_hesiod.c
47 # include <config.h>
49 #include <am_defs.h>
50 #include <amd.h>
51 #include <sun_map.h>
53 #define	HES_PREFIX	"hesiod."
54 #define	HES_PREFLEN	7
64 int amu_hesiod_init(mnt_map *m, char *map, time_t *tp);
65 int hesiod_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp);
66 int hesiod_isup(mnt_map *m, char *map);
69  * No easy way to probe the server - check the map name begins with "hesiod."
70  * Note: this name includes 'amu_' so as to not conflict with libhesiod's
71  * hesiod_init() function.
74 amu_hesiod_init(mnt_map *m, char *map, time_t *tp)
76   dlog("amu_hesiod_init(%s)", map);
77   *tp = 0;
80   if (!hesiod_context && hesiod_init(&hesiod_context) != 0)
84   return NSTREQ(map, HES_PREFIX, HES_PREFLEN) ? 0 : ENOENT;
89  * Do a Hesiod nameserver call.
90  * Modify time is ignored by Hesiod - XXX
93 hesiod_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
101   dlog("hesiod_search(m=%lx, map=%s, key=%s, pval=%lx tp=%lx)",
102        (unsigned long) m, map, key, (unsigned long) pval, (unsigned long) tp);
104   if (key[0] == '.')
107   xsnprintf(hes_key, sizeof(hes_key), "%s.%s", key, map + HES_PREFLEN);
112   dlog("Hesiod base is: %s\n", gopt.hesiod_base);
113   dlog("hesiod_search: hes_resolve(%s, %s)", hes_key, gopt.hesiod_base);
115     _res.options |= RES_DEBUG;
119   rvec = hesiod_resolve(hesiod_context, hes_key, gopt.hesiod_base);
121   rvec = hes_resolve(hes_key, gopt.hesiod_base);
125    * If a reply was forthcoming then return
128   if (rvec && *rvec) {
129     if (m->cfm && (m->cfm->cfm_flags & CFM_SUN_MAP_SYNTAX)) {
130       *pval = sun_entry2amd(key, *rvec);
133       *pval = *rvec;
134     while (*++rvec)
136     return 0;
144    * Otherwise reflect the hesiod error into a Un*x error
146   dlog("hesiod_search: Error: %d", hes_error());
148   case HES_ER_NOTFOUND:
149     error = ENOENT;
151   case HES_ER_CONFIG:
152     error = EIO;
154   case HES_ER_NET:
155     error = ETIMEDOUT;
157   default:
158     error = EINVAL;
161   dlog("hesiod_search: Returning: %d", error);
168  * Check if Hesiod is up, so we can determine if to clear the map or not.
169  * Test it by querying for /defaults.
170  * Returns: 0 if Hesiod is down, 1 if it is up.
173 hesiod_isup(mnt_map *m, char *map)
178   static int last_status = 1;	/* assume up by default */
180   error = hesiod_search(m, map, "/defaults", &val, &mtime);
181   dlog("hesiod_isup(%s): %s", map, strerror(error));
182   if (error != 0 && error != ENOENT) {
184 	 "hesiod_isup: error getting `/defaults' entry in map %s: %m", map);
185     last_status = 0;
186     return 0;			/* Hesiod is down */
188   if (last_status == 0) {	/* if was down before */
189     plog(XLOG_INFO, "hesiod_isup: Hesiod came back up for map %s", map);
190     last_status = 1;
192   return 1;			/* Hesiod is up */