/*      $NetBSD: info_nisplus.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_nisplus.c
*
*/

/*
* Get info from NIS+ (version 3) map
*/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>
#include <sun_map.h>

#define NISPLUS_KEY "key="
#define NISPLUS_ORGDIR ".org_dir"

struct nis_callback_data {
 mnt_map *ncd_m;
 char *ncd_map;
 void (*ncd_fn)();
};

struct nisplus_search_callback_data {
 nis_name key;
 char *value;
};


static int
nisplus_callback(const nis_name key, const nis_object *value, voidp opaquedata)
{
 char *kp = strnsave(ENTRY_VAL(value, 0), ENTRY_LEN(value, 0));
 char *vp = strnsave(ENTRY_VAL(value, 1), ENTRY_LEN(value, 1));
 struct nis_callback_data *data = (struct nis_callback_data *) opaquedata;

 dlog("NISplus callback for <%s,%s>", kp, vp);

 (*data->ncd_fn) (data->ncd_m, kp, vp);

 /*
  * We want more ...
  */
 return FALSE;
}


int
nisplus_reload(mnt_map *m, char *map, void (*fn) ())
{
 int error = 0;
 struct nis_callback_data data;
 nis_result *result;
 char *org;            /* if map does not have ".org_dir" then append it */
 nis_name map_name;
 size_t l;

 org = strstr(map, NISPLUS_ORGDIR);
 if (org == NULL)
   org = NISPLUS_ORGDIR;
 else
   org = "";

 /* make some room for the NIS map_name */
 l = strlen(map) + sizeof(NISPLUS_ORGDIR);
 map_name = xmalloc(l);
 if (map_name == NULL) {
   plog(XLOG_ERROR, "Unable to create map_name %s: %s",
        map, strerror(ENOMEM));
   return ENOMEM;
 }
 xsnprintf(map_name, l, "%s%s", map, org);

 data.ncd_m = m;
 data.ncd_map = map_name;
 data.ncd_fn = fn;

 dlog("NISplus reload for %s", map);

 result = nis_list(map_name,
                   EXPAND_NAME | FOLLOW_LINKS | FOLLOW_PATH,
                   (int (*)()) nisplus_callback,
                   &data);

 /* free off the NIS map_name */
 XFREE(map_name);

 if (result->status != NIS_SUCCESS && result->status != NIS_CBRESULTS)
   error = 1;

 if (error)
   plog(XLOG_ERROR, "error grabbing nisplus map of %s: %s",
        map,
        nis_sperrno(result->status));

 nis_freeresult(result);
 return error;
}


static int
nisplus_search_callback(const nis_name key, const nis_object *value, voidp opaquedata)
{
 struct nisplus_search_callback_data *data = (struct nisplus_search_callback_data *) opaquedata;

 dlog("NISplus search callback for <%s>", ENTRY_VAL(value, 0));
 dlog("NISplus search callback value <%s>", ENTRY_VAL(value, 1));

 data->value = strnsave(ENTRY_VAL(value, 1), ENTRY_LEN(value, 1));
 return TRUE;
}


/*
* Try to locate a key using NIS+.
*/
int
nisplus_search(mnt_map *m, char *map, char *key, char **val, time_t *tp)
{
 nis_result *result;
 int error = 0;
 struct nisplus_search_callback_data data;
 nis_name index;
 char *org;            /* if map does not have ".org_dir" then append it */
 size_t l;

 org = strstr(map, NISPLUS_ORGDIR);
 if (org == NULL)
   org = NISPLUS_ORGDIR;
 else
   org = "";

 /* make some room for the NIS index */
 l = sizeof('[')               /* for opening selection criteria */
   + sizeof(NISPLUS_KEY)
   + strlen(key)
   + sizeof(']')               /* for closing selection criteria */
   + sizeof(',')               /* + 1 for , separator */
   + strlen(map)
   + sizeof(NISPLUS_ORGDIR);
 index = xmalloc(l);
 if (index == NULL) {
   plog(XLOG_ERROR,
        "Unable to create index %s: %s",
        map,
        strerror(ENOMEM));
   return ENOMEM;
 }
 xsnprintf(index, l, "[%s%s],%s%s", NISPLUS_KEY, key, map, org);

 data.key = key;
 data.value = NULL;

 dlog("NISplus search for %s", index);

 result = nis_list(index,
                   EXPAND_NAME | FOLLOW_LINKS | FOLLOW_PATH,
                   (int (*)()) nisplus_search_callback,
                   &data);

 /* free off the NIS index */
 XFREE(index);

 if (result == NULL) {
   plog(XLOG_ERROR, "nisplus_search: %s: %s", map, strerror(ENOMEM));
   return ENOMEM;
 }

 /*
  * Do something interesting with the return code
  */
 switch (result->status) {
 case NIS_SUCCESS:
 case NIS_CBRESULTS:

   if (data.value == NULL) {
     nis_object *value = result->objects.objects_val;
     dlog("NISplus search found <nothing>");
     dlog("NISplus search for %s: %s(%d)",
          map, nis_sperrno(result->status), result->status);

     if (value != NULL)
       data.value = strnsave(ENTRY_VAL(value, 1), ENTRY_LEN(value, 1));
   }

   if (m->cfm && (m->cfm->cfm_flags & CFM_SUN_MAP_SYNTAX)) {
     *val = sun_entry2amd(key, data.value);
     XFREE(data.value);        /* strnsave malloc'ed it above */
   } else
     *val = data.value;

   if (*val) {
     error = 0;
     dlog("NISplus search found %s", *val);
   } else {
     error = ENOENT;
     dlog("NISplus search found nothing");
   }

   *tp = 0;
   break;

 case NIS_NOSUCHNAME:
   dlog("NISplus search returned %d", result->status);
   error = ENOENT;
   break;

 default:
   plog(XLOG_ERROR, "nisplus_search: %s: %s", map, nis_sperrno(result->status));
   error = EIO;
   break;
 }
 nis_freeresult(result);

 return error;
}


int
nisplus_init(mnt_map *m, char *map, time_t *tp)
{
 nis_result *result;
 char *org;            /* if map does not have ".org_dir" then append it */
 nis_name map_name;
 int error = 0;
 size_t l;

 org = strstr(map, NISPLUS_ORGDIR);
 if (org == NULL)
   org = NISPLUS_ORGDIR;
 else
   org = "";

 /* make some room for the NIS map_name */
 l = strlen(map) + sizeof(NISPLUS_ORGDIR);
 map_name = xmalloc(l);
 if (map_name == NULL) {
   plog(XLOG_ERROR,
        "Unable to create map_name %s: %s",
        map,
        strerror(ENOMEM));
   return ENOMEM;
 }
 xsnprintf(map_name, l, "%s%s", map, org);

 result = nis_lookup(map_name, (EXPAND_NAME | FOLLOW_LINKS | FOLLOW_PATH));

 /* free off the NIS map_name */
 XFREE(map_name);

 if (result == NULL) {
   plog(XLOG_ERROR, "NISplus init <%s>: %s", map, strerror(ENOMEM));
   return ENOMEM;
 }

 if (result->status != NIS_SUCCESS) {
   dlog("NISplus init <%s>: %s (%d)",
        map, nis_sperrno(result->status), result->status);

   error = ENOENT;
 }

 *tp = 0;                      /* no time */
 nis_freeresult(result);
 return error;
}


int
nisplus_mtime(mnt_map *m, char *map, time_t *tp)
{
 return nisplus_init(m,map, tp);
}

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