Work on bug #550: Avoid exit. In particular the mfile/cfile/bfile has
[idzebra-moved-to-github.git] / index / zebraapi.c
index 7d1eac2..0ff27a1 100644 (file)
@@ -1,33 +1,77 @@
-/*
- * Copyright (C) 1995-2002, Index Data
- * All rights reserved.
- *
- * $Id: zebraapi.c,v 1.55 2002-04-15 13:48:11 adam Exp $
- */
+/* $Id: zebraapi.c,v 1.231 2006-11-14 08:12:08 adam Exp $
+   Copyright (C) 1995-2006
+   Index Data ApS
+
+This file is part of the Zebra server.
+
+Zebra is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+*/
 
 #include <assert.h>
 #include <stdio.h>
+#include <limits.h>
 #ifdef WIN32
 #include <io.h>
 #include <process.h>
 #include <direct.h>
-#else
+#endif
+#if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
 
 #include <yaz/diagbib1.h>
+#include <yaz/pquery.h>
+#include <yaz/sortspec.h>
 #include "index.h"
+#include "rank.h"
+#include "orddict.h"
 #include <charmap.h>
+#include <idzebra/api.h>
+
+#define DEFAULT_APPROX_LIMIT 2000000000
+
+/* simple asserts to validate the most essential input args */
+#define ASSERTZH assert(zh && zh->service)
+#define ASSERTZHRES assert(zh && zh->service && zh->res)
+#define ASSERTZS assert(zs)
+
+static int log_level = 0;
+static int log_level_initialized = 0;
+
+static void zebra_open_res(ZebraHandle zh);
+static void zebra_close_res(ZebraHandle zh);
+
+static ZEBRA_RES zebra_check_handle(ZebraHandle zh)
+{
+    if (zh)
+        return ZEBRA_OK;
+    return ZEBRA_FAIL;
+}
 
-static Res zebra_open_res (ZebraHandle zh);
-static void zebra_close_res (ZebraHandle zh);
+#define ZEBRA_CHECK_HANDLE(zh) if (zebra_check_handle(zh) != ZEBRA_OK) return ZEBRA_FAIL
 
-static void zebra_chdir (ZebraService zh)
+static void zebra_chdir (ZebraService zs)
 {
-    const char *dir = res_get (zh->global_res, "chdir");
+    const char *dir ;
+    ASSERTZS;
+    yaz_log(log_level, "zebra_chdir");
+    dir = res_get (zs->global_res, "chdir");
     if (!dir)
        return;
-    logf (LOG_DEBUG, "chdir %s", dir);
+    yaz_log (YLOG_DEBUG, "chdir %s", dir);
 #ifdef WIN32
     _chdir(dir);
 #else
@@ -35,33 +79,41 @@ static void zebra_chdir (ZebraService zh)
 #endif
 }
 
-static void zebra_flush_reg (ZebraHandle zh)
+static ZEBRA_RES zebra_flush_reg (ZebraHandle zh)
 {
-    zebraExplain_flush (zh->reg->zei, 1, zh);
+    ZEBRA_CHECK_HANDLE(zh);
+    yaz_log(log_level, "zebra_flush_reg");
+    zebraExplain_flush (zh->reg->zei, zh);
     
-    extract_flushWriteKeys (zh);
-    zebra_index_merge (zh);
+    extract_flushWriteKeys (zh, 1 /* final */);
+    zebra_index_merge (zh );
+    return ZEBRA_OK;
 }
 
-static struct zebra_register *zebra_register_open (ZebraService zs, 
-                                                   const char *name,
-                                                   int rw, int useshadow,
-                                                   Res res,
-                                                   const char *reg_path);
-static void zebra_register_close (ZebraService zs, struct zebra_register *reg);
+static struct zebra_register *zebra_register_open(ZebraService zs, 
+                                                 const char *name,
+                                                 int rw, int useshadow,
+                                                 Res res,
+                                                 const char *reg_path);
+static void zebra_register_close(ZebraService zs, struct zebra_register *reg);
 
-static int zebra_begin_read (ZebraHandle zh);
-static void zebra_end_read (ZebraHandle zh);
-
-ZebraHandle zebra_open (ZebraService zs)
+ZebraHandle zebra_open(ZebraService zs, Res res)
 {
     ZebraHandle zh;
+    const char *default_encoding;
+    if (!log_level_initialized)
+    {
+        log_level = yaz_log_module_level("zebraapi");
+        log_level_initialized = 1;
+    }
+
+    yaz_log(log_level, "zebra_open");
 
     if (!zs)
         return 0;
 
-    zh = (ZebraHandle) xmalloc (sizeof(*zh));
-    yaz_log (LOG_LOG, "zebra_open zs=%p returns %p", zs, zh);
+    zh = (ZebraHandle) xmalloc(sizeof(*zh));
+    yaz_log (YLOG_DEBUG, "zebra_open zs=%p returns %p", zs, zh);
 
     zh->service = zs;
     zh->reg = 0;          /* no register attached yet */
@@ -69,21 +121,41 @@ ZebraHandle zebra_open (ZebraService zs)
     zh->destroyed = 0;
     zh->errCode = 0;
     zh->errString = 0;
-    zh->res = 0;
+    zh->res = 0; 
+    zh->session_res = res_open(zs->global_res, res);
+    zh->user_perm = 0;
+    zh->dbaccesslist = 0;
 
     zh->reg_name = xstrdup ("");
     zh->path_reg = 0;
     zh->num_basenames = 0;
     zh->basenames = 0;
 
+    zh->approx_limit = DEFAULT_APPROX_LIMIT;
     zh->trans_no = 0;
+    zh->trans_w_no = 0;
 
     zh->lock_normal = 0;
     zh->lock_shadow = 0;
 
-    zh->admin_databaseName = 0;
-
     zh->shadow_enable = 1;
+    zh->m_staticrank = 0;
+    zh->m_segment_indexing = 0;
+
+    default_encoding = res_get_def(zh->session_res, "encoding", "ISO-8859-1");
+
+    zh->iconv_to_utf8 =
+        yaz_iconv_open ("UTF-8", default_encoding);
+    if (zh->iconv_to_utf8 == 0)
+        yaz_log (YLOG_WARN, "iconv: %s to UTF-8 unsupported",
+           default_encoding);
+    zh->iconv_from_utf8 =
+        yaz_iconv_open (default_encoding, "UTF-8");
+    if (zh->iconv_to_utf8 == 0)
+        yaz_log (YLOG_WARN, "iconv: UTF-8 to %s unsupported",
+           default_encoding);
+
+    zh->record_encoding = 0;
 
     zebra_mutex_cond_lock (&zs->session_lock);
 
@@ -92,57 +164,149 @@ ZebraHandle zebra_open (ZebraService zs)
 
     zebra_mutex_cond_unlock (&zs->session_lock);
 
+    zh->store_data_buf = 0;
+
+    zh->m_limit = zebra_limit_create(1, 0);
+
+    zh->nmem_error = nmem_create();
+
     return zh;
 }
 
 ZebraService zebra_start (const char *configName)
 {
+    return zebra_start_res(configName, 0, 0);
+}
+
+ZebraService zebra_start_res (const char *configName, Res def_res, Res over_res)
+{
     Res res;
 
-    yaz_log (LOG_LOG, "zebra_start %s", configName);
+    zebra_flock_init();
 
-    if (!(res = res_open (configName, 0)))
-       yaz_log (LOG_WARN, "Cannot read resources `%s'", configName);
-    else
+    if (!log_level_initialized)
     {
-        ZebraService zh = xmalloc (sizeof(*zh));
+        log_level = yaz_log_module_level("zebraapi");
+        log_level_initialized = 1;
+    }
+    
+    yaz_log(YLOG_LOG, "zebra_start %s %s", ZEBRAVER,
+           configName ? configName : "");
 
-       yaz_log (LOG_LOG, "Read resources `%s'", configName);
-        
+    if ((res = res_open(def_res, over_res)))
+    {
+       const char *passwd_plain = 0;
+       const char *passwd_encrypt = 0;
+       const char *dbaccess = 0;
+        ZebraService zh = 0;
+
+       if (configName)
+       {
+           ZEBRA_RES ret = res_read_file(res, configName);
+           if (ret != ZEBRA_OK)
+           {
+               res_close(res);
+               return 0;
+           }
+       }
+       zh = xmalloc(sizeof(*zh));
         zh->global_res = res;
-        zh->configName = xstrdup(configName);
         zh->sessions = 0;
         
         zebra_chdir (zh);
         
         zebra_mutex_cond_init (&zh->session_lock);
-        if (!res_get (zh->global_res, "passwd"))
+       passwd_plain = res_get (zh->global_res, "passwd");
+       passwd_encrypt = res_get (zh->global_res, "passwd.c");
+       dbaccess = res_get (zh->global_res, "dbaccess");
+
+        if (!passwd_plain && !passwd_encrypt)
             zh->passwd_db = NULL;
-        else
+        else 
         {
-            zh->passwd_db = passwd_db_open ();
+            zh->passwd_db = passwd_db_open();
             if (!zh->passwd_db)
-                logf (LOG_WARN|LOG_ERRNO, "passwd_db_open failed");
+                yaz_log (YLOG_WARN|YLOG_ERRNO, "passwd_db_open failed");
             else
-                passwd_db_file (zh->passwd_db,
-                                res_get (zh->global_res, "passwd"));
+           {
+               if (passwd_plain)
+                   passwd_db_file_plain(zh->passwd_db, passwd_plain);
+               if (passwd_encrypt)
+                   passwd_db_file_crypt(zh->passwd_db, passwd_encrypt);
+           }
         }
+
+       if (!dbaccess)
+           zh->dbaccess = NULL;
+       else {
+           zh->dbaccess = res_open(NULL, NULL);
+           if (res_read_file(zh->dbaccess, dbaccess) != ZEBRA_OK) {
+               yaz_log(YLOG_FATAL, "Failed to read %s", dbaccess);
+               return NULL;
+           }
+       }
+
         zh->path_root = res_get (zh->global_res, "root");
+       zh->nmem = nmem_create();
+       zh->record_classes = recTypeClass_create (zh->global_res, zh->nmem);
+
+       if (1)
+       {
+           const char *module_path = res_get(res, "modulePath");
+           if (module_path)
+               recTypeClass_load_modules(&zh->record_classes, zh->nmem,
+                                         module_path);
+       }
         return zh;
     }
     return 0;
 }
 
+void zebra_filter_info(ZebraService zs, void *cd,
+                       void (*cb)(void *cd, const char *name))
+{
+    ASSERTZS;
+    assert(cb);
+    recTypeClass_info(zs->record_classes, cd, cb);
+}
+
+void zebra_pidfname(ZebraService zs, char *path)
+{
+    ASSERTZS;
+    zebra_lock_prefix (zs->global_res, path);
+    strcat(path, "zebrasrv.pid");
+}
+
+Dict dict_open_res (BFiles bfs, const char *name, int cache, int rw,
+                   int compact_flag, Res res)
+{
+    int page_size = 4096;
+    char resource_str[200];
+    sprintf (resource_str, "dict.%.100s.pagesize", name);
+    assert(bfs);
+    assert(name);
+
+    if (res_get_int(res, resource_str, &page_size) == ZEBRA_OK)
+       yaz_log(YLOG_LOG, "Using custom dictionary page size %d for %s",
+               page_size, name);
+    return dict_open(bfs, name, cache, rw, compact_flag, page_size);
+}
+
 static
-struct zebra_register *zebra_register_open (ZebraService zs, const char *name,
-                                            int rw, int useshadow, Res res,
-                                            const char *reg_path)
+struct zebra_register *zebra_register_open(ZebraService zs, const char *name,
+                                          int rw, int useshadow, Res res,
+                                          const char *reg_path)
 {
     struct zebra_register *reg;
     int record_compression = REC_COMPRESS_NONE;
-    char *recordCompression = 0;
+    const char *recordCompression = 0;
+    const char *profilePath;
+    char cwd[1024];
+    ZEBRA_RES ret = ZEBRA_OK;
 
-    reg = xmalloc (sizeof(*reg));
+    ASSERTZS;
+    
+    reg = xmalloc(sizeof(*reg));
 
     assert (name);
     reg->name = xstrdup (name);
@@ -152,45 +316,78 @@ struct zebra_register *zebra_register_open (ZebraService zs, const char *name,
 
     assert (res);
 
-    yaz_log (LOG_LOG, "zebra_register_open rw = %d useshadow=%d p=%p",
-             rw, useshadow, reg);
-
-    reg->dh = data1_create ();
+    yaz_log (YLOG_DEBUG, "zebra_register_open rw=%d useshadow=%d p=%p n=%s rp=%s",
+             rw, useshadow, reg, name, reg_path ? reg_path : "(none)");
+    
+    reg->dh = data1_create();
     if (!reg->dh)
+    {
+       xfree(reg->name);
+       xfree(reg);
         return 0;
+    }
     reg->bfs = bfs_create (res_get (res, "register"), reg_path);
     if (!reg->bfs)
     {
         data1_destroy(reg->dh);
+       xfree(reg->name);
+       xfree(reg);
         return 0;
     }
     if (useshadow)
-        bf_cache (reg->bfs, res_get (res, "shadow"));
-    data1_set_tabpath (reg->dh, res_get(res, "profilePath"));
+    {
+        if (bf_cache (reg->bfs, res_get (res, "shadow")) == ZEBRA_FAIL)
+       {
+           bfs_destroy(reg->bfs);
+           data1_destroy(reg->dh);
+           xfree(reg->name);
+           xfree(reg);
+           return 0;
+       }
+    }
+
+    getcwd(cwd, sizeof(cwd)-1);
+    profilePath = res_get_def(res, "profilePath", DEFAULT_PROFILE_PATH);
+    yaz_log(YLOG_DEBUG, "profilePath=%s cwd=%s", profilePath, cwd);
+
+    data1_set_tabpath (reg->dh, profilePath);
     data1_set_tabroot (reg->dh, reg_path);
-    reg->recTypes = recTypes_init (reg->dh);
-    recTypes_default_handlers (reg->recTypes);
+    reg->recTypes = recTypes_init (zs->record_classes, reg->dh);
 
-    reg->zebra_maps = zebra_maps_open (res, reg_path);
+    reg->zebra_maps =
+       zebra_maps_open(res, reg_path, profilePath);
+    if (!reg->zebra_maps)
+    {
+       recTypes_destroy(reg->recTypes);
+       bfs_destroy(reg->bfs);
+       data1_destroy(reg->dh);
+       xfree(reg->name);
+       xfree(reg);
+       return 0;
+    }
     reg->rank_classes = NULL;
 
     reg->key_buf = 0;
 
-    reg->keys.buf_max = 0;
-    reg->keys.buf = 0;
+    reg->keys = zebra_rec_keys_open();
+
+    reg->sortKeys = zebra_rec_keys_open();
 
     reg->records = 0;
     reg->dict = 0;
     reg->sortIdx = 0;
     reg->isams = 0;
     reg->matchDict = 0;
-    reg->isam = 0;
     reg->isamc = 0;
-    reg->isamd = 0;
+    reg->isamb = 0;
     reg->zei = 0;
-    reg->matchDict = 0;
+    reg->key_file_no = 0;
+    reg->ptr_i = 0;
     
-    zebraRankInstall (reg, rank1_class);
+    /* installing rank classes */
+    zebraRankInstall (reg, rank_1_class);
+    zebraRankInstall (reg, rank_similarity_class);
+    zebraRankInstall (reg, rank_static_class);
 
     recordCompression = res_get_def (res, "recordCompression", "none");
     if (!strcmp (recordCompression, "none"))
@@ -198,24 +395,34 @@ struct zebra_register *zebra_register_open (ZebraService zs, const char *name,
     if (!strcmp (recordCompression, "bzip2"))
        record_compression = REC_COMPRESS_BZIP2;
 
+    if (1)
+    {
+       const char *index_fname = res_get_def(res, "index", "default.idx");
+       if (index_fname && *index_fname)
+       {
+           if (zebra_maps_read_file(reg->zebra_maps, index_fname) != ZEBRA_OK)
+               ret = ZEBRA_FAIL;
+       }
+    }
+
     if (!(reg->records = rec_open (reg->bfs, rw, record_compression)))
     {
-       logf (LOG_WARN, "rec_open");
-       return 0;
+       yaz_log (YLOG_WARN, "rec_open failed");
+       ret = ZEBRA_FAIL;
     }
     if (rw)
     {
-        reg->matchDict = dict_open (reg->bfs, GMATCH_DICT, 20, 1, 0);
+        reg->matchDict = dict_open_res (reg->bfs, GMATCH_DICT, 20, 1, 0, res);
     }
-    if (!(reg->dict = dict_open (reg->bfs, FNAME_DICT, 40, rw, 0)))
+    if (!(reg->dict = dict_open_res (reg->bfs, FNAME_DICT, 40, rw, 0, res)))
     {
-       logf (LOG_WARN, "dict_open");
-       return 0;
+       yaz_log (YLOG_WARN, "dict_open failed");
+       ret = ZEBRA_FAIL;
     }
     if (!(reg->sortIdx = sortIdx_open (reg->bfs, rw)))
     {
-       logf (LOG_WARN, "sortIdx_open");
-       return 0;
+       yaz_log (YLOG_WARN, "sortIdx_open failed");
+       ret = ZEBRA_FAIL;
     }
     if (res_get_match (res, "isam", "s", ISAM_DEFAULT))
     {
@@ -223,90 +430,116 @@ struct zebra_register *zebra_register_open (ZebraService zs, const char *name,
        if (!(reg->isams = isams_open (reg->bfs, FNAME_ISAMS, rw,
                                      key_isams_m(res, &isams_m))))
        {
-           logf (LOG_WARN, "isams_open");
-           return 0;
+           yaz_log (YLOG_WARN, "isams_open failed");
+           ret = ZEBRA_FAIL;
        }
     }
-    else if (res_get_match (res, "isam", "i", ISAM_DEFAULT))
+    if (res_get_match (res, "isam", "c", ISAM_DEFAULT))
     {
-       if (!(reg->isam = is_open (reg->bfs, FNAME_ISAM, key_compare, rw,
-                                 sizeof (struct it_key), res)))
+       struct ISAMC_M_s isamc_m;
+       if (!(reg->isamc = isamc_open (reg->bfs, FNAME_ISAMC,
+                                   rw, key_isamc_m(res, &isamc_m))))
        {
-           logf (LOG_WARN, "is_open");
-           return 0;
+           yaz_log (YLOG_WARN, "isamc_open failed");
+           ret = ZEBRA_FAIL;
        }
     }
-    else if (res_get_match (res, "isam", "c", ISAM_DEFAULT))
+    if (res_get_match (res, "isam", "b", ISAM_DEFAULT))
     {
        struct ISAMC_M_s isamc_m;
-       if (!(reg->isamc = isc_open (reg->bfs, FNAME_ISAMC,
-                                   rw, key_isamc_m(res, &isamc_m))))
+       
+       if (!(reg->isamb = isamb_open (reg->bfs, "isamb",
+                                       rw, key_isamc_m(res, &isamc_m), 0)))
        {
-           logf (LOG_WARN, "isc_open");
-           return 0;
+           yaz_log (YLOG_WARN, "isamb_open failed");
+           ret = ZEBRA_FAIL;
        }
     }
-    else if (res_get_match (res, "isam", "d", ISAM_DEFAULT))
+    if (res_get_match (res, "isam", "bc", ISAM_DEFAULT))
     {
-       struct ISAMD_M_s isamd_m;
+       struct ISAMC_M_s isamc_m;
        
-       if (!(reg->isamd = isamd_open (reg->bfs, FNAME_ISAMD,
-                                     rw, key_isamd_m(res, &isamd_m))))
+       if (!(reg->isamb = isamb_open (reg->bfs, "isamb",
+                                       rw, key_isamc_m(res, &isamc_m), 1)))
        {
-           logf (LOG_WARN, "isamd_open");
-           return 0;
+           yaz_log (YLOG_WARN, "isamb_open failed");
+           ret = ZEBRA_FAIL;
+       }
+    }
+    if (res_get_match (res, "isam", "null", ISAM_DEFAULT))
+    {
+       struct ISAMC_M_s isamc_m;
+       
+       if (!(reg->isamb = isamb_open (reg->bfs, "isamb",
+                                       rw, key_isamc_m(res, &isamc_m), -1)))
+       {
+           yaz_log (YLOG_WARN, "isamb_open failed");
+           ret = ZEBRA_FAIL;
+       }
+    }
+    if (ret == ZEBRA_OK)
+    {
+       reg->zei = zebraExplain_open(reg->records, reg->dh,
+                                    res, rw, reg,
+                                    zebra_extract_explain);
+       if (!reg->zei)
+       {
+           yaz_log (YLOG_WARN, "Cannot obtain EXPLAIN information");
+           ret = ZEBRA_FAIL;
        }
     }
-    reg->zei = zebraExplain_open (reg->records, reg->dh,
-                                  res, rw, reg,
-                                  explain_extract);
-    if (!reg->zei)
+    
+    if (ret != ZEBRA_OK)
     {
-       logf (LOG_WARN, "Cannot obtain EXPLAIN information");
+       zebra_register_close(zs, reg);
        return 0;
     }
-    reg->active = 2;
-    yaz_log (LOG_LOG, "zebra_register_open ok p=%p", reg);
+    yaz_log (YLOG_DEBUG, "zebra_register_open ok p=%p", reg);
     return reg;
 }
 
-void zebra_admin_shutdown (ZebraHandle zh)
+ZEBRA_RES zebra_admin_shutdown (ZebraHandle zh)
 {
+    ZEBRA_CHECK_HANDLE(zh);
+    yaz_log(log_level, "zebra_admin_shutdown");
+
     zebra_mutex_cond_lock (&zh->service->session_lock);
     zh->service->stop_flag = 1;
     zebra_mutex_cond_unlock (&zh->service->session_lock);
+    return ZEBRA_OK;
 }
 
-void zebra_admin_start (ZebraHandle zh)
+ZEBRA_RES zebra_admin_start (ZebraHandle zh)
 {
-    ZebraService zs = zh->service;
-    zh->errCode = 0;
+    ZebraService zs;
+    ZEBRA_CHECK_HANDLE(zh);
+    yaz_log(log_level, "zebra_admin_start");
+    zs = zh->service;
     zebra_mutex_cond_lock (&zs->session_lock);
     zebra_mutex_cond_unlock (&zs->session_lock);
+    return ZEBRA_OK;
 }
 
-static void zebra_register_close (ZebraService zs, struct zebra_register *reg)
+static void zebra_register_close(ZebraService zs, struct zebra_register *reg)
 {
-    yaz_log(LOG_LOG, "zebra_register_close p=%p", reg);
+    ASSERTZS;
+    assert(reg);
+    yaz_log(YLOG_DEBUG, "zebra_register_close p=%p", reg);
     reg->stop_flag = 0;
     zebra_chdir (zs);
-    if (reg->records)
-    {
-        zebraExplain_close (reg->zei, 0);
-        dict_close (reg->dict);
-        if (reg->matchDict)
-            dict_close (reg->matchDict);
-       sortIdx_close (reg->sortIdx);
-       if (reg->isams)
-           isams_close (reg->isams);
-        if (reg->isam)
-            is_close (reg->isam);
-        if (reg->isamc)
-            isc_close (reg->isamc);
-        if (reg->isamd)
-            isamd_close (reg->isamd);
-        rec_close (&reg->records);
-    }
+    
+    zebraExplain_close (reg->zei);
+    dict_close (reg->dict);
+    if (reg->matchDict)
+       dict_close (reg->matchDict);
+    sortIdx_close (reg->sortIdx);
+    if (reg->isams)
+       isams_close (reg->isams);
+    if (reg->isamc)
+       isamc_close (reg->isamc);
+    if (reg->isamb)
+       isamb_close (reg->isamb);
+    rec_close (&reg->records);
 
     recTypes_destroy (reg->recTypes);
     zebra_maps_close (reg->zebra_maps);
@@ -314,57 +547,70 @@ static void zebra_register_close (ZebraService zs, struct zebra_register *reg)
     bfs_destroy (reg->bfs);
     data1_destroy (reg->dh);
 
-    xfree (reg->key_buf);
-    xfree (reg->name);
-    xfree (reg);
-    yaz_log (LOG_LOG, "zebra_register_close 2");
+    zebra_rec_keys_close(reg->keys);
+    zebra_rec_keys_close(reg->sortKeys);
+
+    xfree(reg->key_buf);
+    xfree(reg->name);
+    xfree(reg);
 }
 
-void zebra_stop(ZebraService zs)
+ZEBRA_RES zebra_stop(ZebraService zs)
 {
     if (!zs)
-       return ;
-    yaz_log (LOG_LOG, "zebra_stop");
+        return ZEBRA_OK;
+    yaz_log (log_level, "zebra_stop");
 
-    zebra_mutex_cond_lock (&zs->session_lock);
     while (zs->sessions)
     {
         zebra_close (zs->sessions);
     }
         
-    zebra_mutex_cond_unlock (&zs->session_lock);
-
     zebra_mutex_cond_destroy (&zs->session_lock);
 
     if (zs->passwd_db)
        passwd_db_close (zs->passwd_db);
 
+    recTypeClass_destroy(zs->record_classes);
+    nmem_destroy(zs->nmem);
     res_close (zs->global_res);
-    xfree (zs->configName);
-    xfree (zs->path_root);
-    xfree (zs);
+    xfree(zs);
+    return ZEBRA_OK;
 }
 
-void zebra_close (ZebraHandle zh)
+ZEBRA_RES zebra_close(ZebraHandle zh)
 {
     ZebraService zs;
     struct zebra_session **sp;
+    int i;
 
-    if (!zh)
-        return;
+    yaz_log(log_level, "zebra_close");
+    ZEBRA_CHECK_HANDLE(zh);
 
+    zh->errCode = 0;
+    
     zs = zh->service;
-    yaz_log (LOG_LOG, "zebra_close zh=%p", zh);
-    if (!zh)
-       return ;
+    yaz_log (YLOG_DEBUG, "zebra_close zh=%p", zh);
     resultSetDestroy (zh, -1, 0, 0);
 
-
     if (zh->reg)
-        zebra_register_close (zh->service, zh->reg);
+        zebra_register_close(zh->service, zh->reg);
     zebra_close_res (zh);
+    res_close(zh->session_res);
+
+    xfree(zh->record_encoding);
+
+    xfree(zh->dbaccesslist);
+
+    for (i = 0; i < zh->num_basenames; i++)
+        xfree(zh->basenames[i]);
+    xfree(zh->basenames);
+
+    if (zh->iconv_to_utf8 != 0)
+        yaz_iconv_close (zh->iconv_to_utf8);
+    if (zh->iconv_from_utf8 != 0)
+        yaz_iconv_close (zh->iconv_from_utf8);
 
-    xfree (zh->admin_databaseName);
     zebra_mutex_cond_lock (&zs->session_lock);
     zebra_lock_destroy (zh->lock_normal);
     zebra_lock_destroy (zh->lock_shadow);
@@ -379,12 +625,19 @@ void zebra_close (ZebraHandle zh)
        }
        sp = &(*sp)->next;
     }
-//    if (!zs->sessions && zs->stop_flag)
-//     zebra_register_deactivate(zs);
     zebra_mutex_cond_unlock (&zs->session_lock);
-    xfree (zh->reg_name);
-    xfree (zh);
-    yaz_log (LOG_LOG, "zebra_close zh=%p end", zh);}
+    xfree(zh->reg_name);
+    xfree(zh->user_perm);
+    zh->service = 0; /* more likely to trigger an assert */
+
+    zebra_limit_destroy(zh->m_limit);
+
+    nmem_destroy(zh->nmem_error);
+
+    xfree(zh->path_reg);
+    xfree(zh);
+    return ZEBRA_OK;
+}
 
 struct map_baseinfo {
     ZebraHandle zh;
@@ -396,40 +649,43 @@ struct map_baseinfo {
     int new_num_max;
 };
 
-static Res zebra_open_res (ZebraHandle zh)
+static void zebra_open_res(ZebraHandle zh)
 {
-    Res res = 0;
     char fname[512];
+    ASSERTZH;
+    zh->errCode = 0;
+
     if (zh->path_reg)
     {
-        sprintf (fname, "%.200s/zebra.cfg", zh->path_reg);
-        res = res_open (fname, zh->service->global_res);
-        if (!res)
-            res = zh->service->global_res;
+        sprintf(fname, "%.200s/zebra.cfg", zh->path_reg);
+        zh->res = res_open(zh->session_res, 0);
+       res_read_file(zh->res, fname);
     }
     else if (*zh->reg_name == 0)
     {
-        res = zh->service->global_res;
+        zh->res = res_open(zh->session_res, 0);
     }
     else
     {
-        yaz_log (LOG_WARN, "no register root specified");
-        return 0;  /* no path for register - fail! */
+        yaz_log (YLOG_WARN, "no register root specified");
+        zh->res = 0;  /* no path for register - fail! */
     }
-    return res;
 }
 
 static void zebra_close_res (ZebraHandle zh)
 {
-    if (zh->res != zh->service->global_res)
-        res_close (zh->res);
+    ASSERTZH;
+    zh->errCode = 0;
+    res_close (zh->res);
     zh->res = 0;
 }
 
-static int zebra_select_register (ZebraHandle zh, const char *new_reg)
+static void zebra_select_register (ZebraHandle zh, const char *new_reg)
 {
+    ASSERTZH;
+    zh->errCode = 0;
     if (zh->res && strcmp (zh->reg_name, new_reg) == 0)
-        return 0;
+        return;
     if (!zh->res)
     {
         assert (zh->reg == 0);
@@ -440,19 +696,19 @@ static int zebra_select_register (ZebraHandle zh, const char *new_reg)
         if (zh->reg)
         {
             resultSetInvalidate (zh);
-            zebra_register_close (zh->service, zh->reg);
+            zebra_register_close(zh->service, zh->reg);
             zh->reg = 0;
         }
         zebra_close_res(zh);
     }
-    xfree (zh->reg_name);
+    xfree(zh->reg_name);
     zh->reg_name = xstrdup (new_reg);
 
-    xfree (zh->path_reg);
+    xfree(zh->path_reg);
     zh->path_reg = 0;
     if (zh->service->path_root)
     {
-        zh->path_reg = xmalloc (strlen(zh->service->path_root) + 
+        zh->path_reg = xmalloc(strlen(zh->service->path_root) + 
                                 strlen(zh->reg_name) + 3);
         strcpy (zh->path_reg, zh->service->path_root);
         if (*zh->reg_name)
@@ -461,7 +717,7 @@ static int zebra_select_register (ZebraHandle zh, const char *new_reg)
             strcat (zh->path_reg, zh->reg_name);
         }
     }
-    zh->res = zebra_open_res (zh);
+    zebra_open_res(zh);
     
     if (zh->lock_normal)
         zebra_lock_destroy (zh->lock_normal);
@@ -474,20 +730,53 @@ static int zebra_select_register (ZebraHandle zh, const char *new_reg)
     if (zh->res)
     {
         char fname[512];
-        const char *lock_area  =res_get (zh->res, "lockDir");
+        const char *lock_area = res_get (zh->res, "lockDir");
         
         if (!lock_area && zh->path_reg)
-            res_put (zh->res, "lockDir", zh->path_reg);
+            res_set (zh->res, "lockDir", zh->path_reg);
         sprintf (fname, "norm.%s.LCK", zh->reg_name);
         zh->lock_normal =
-            zebra_lock_create (res_get(zh->res, "lockDir"), fname, 0);
+            zebra_lock_create (res_get(zh->res, "lockDir"), fname);
         
         sprintf (fname, "shadow.%s.LCK", zh->reg_name);
         zh->lock_shadow =
-            zebra_lock_create (res_get(zh->res, "lockDir"), fname, 0);
+            zebra_lock_create (res_get(zh->res, "lockDir"), fname);
 
+       if (!zh->lock_normal || !zh->lock_shadow)
+       {
+           if (zh->lock_normal)
+           {
+               zebra_lock_destroy(zh->lock_normal);
+               zh->lock_normal = 0;
+           }
+           if (zh->lock_shadow)
+           {
+               zebra_lock_destroy(zh->lock_shadow);
+               zh->lock_shadow = 0;
+           }
+           zebra_close_res(zh);
+       }
+    }
+    if (zh->res)
+    {
+       int approx = 0;
+       if (res_get_int(zh->res, "estimatehits", &approx) == ZEBRA_OK)
+           zebra_set_approx_limit(zh, approx);
+    }
+    if (zh->res)
+    {
+       if (res_get_int(zh->res, "staticrank", &zh->m_staticrank) == ZEBRA_OK)
+           yaz_log(YLOG_LOG, "static rank set and is %d", zh->m_staticrank);
+    }
+    if (zh->res)
+    {
+       if (res_get_int(zh->res, "segment", &zh->m_segment_indexing) == 
+            ZEBRA_OK)
+        {
+           yaz_log(YLOG_DEBUG, "segment indexing set and is %d",
+                    zh->m_segment_indexing);
+        }
     }
-    return 1;
 }
 
 void map_basenames_func (void *vp, const char *name, const char *value)
@@ -495,6 +784,10 @@ void map_basenames_func (void *vp, const char *name, const char *value)
     struct map_baseinfo *p = (struct map_baseinfo *) vp;
     int i, no;
     char fromdb[128], todb[8][128];
+
+    assert(value);
+    assert(name);
+    assert(vp);
     
     no =
        sscanf (value, "%127s %127s %127s %127s %127s %127s %127s %127s %127s",
@@ -504,7 +797,7 @@ void map_basenames_func (void *vp, const char *name, const char *value)
        return ;
     no--;
     for (i = 0; i<p->num_bases; i++)
-       if (p->basenames[i] && !strcmp (p->basenames[i], fromdb))
+       if (p->basenames[i] && !STRCASECMP (p->basenames[i], fromdb))
        {
            p->basenames[i] = 0;
            for (i = 0; i < no; i++)
@@ -518,14 +811,33 @@ void map_basenames_func (void *vp, const char *name, const char *value)
        }
 }
 
+int zebra_select_default_database(ZebraHandle zh)
+{
+    if (!zh->res)
+    {
+       /* no database has been selected - so we select based on
+          resource setting (including group)
+       */
+       const char *group = res_get(zh->session_res, "group");
+       const char *v = res_get_prefix(zh->session_res,
+                                      "database", group, "Default");
+       return zebra_select_database(zh, v);
+    }
+    return 0;
+}
+
 void map_basenames (ZebraHandle zh, ODR stream,
                    int *num_bases, char ***basenames)
 {
     struct map_baseinfo info;
     struct map_baseinfo *p = &info;
     int i;
+    ASSERTZH;
+    yaz_log(log_level, "map_basenames ");
+    assert(stream);
 
     info.zh = zh;
+
     info.num_bases = *num_bases;
     info.basenames = *basenames;
     info.new_num_max = 128;
@@ -534,7 +846,7 @@ void map_basenames (ZebraHandle zh, ODR stream,
        odr_malloc (stream, sizeof(*info.new_basenames) * info.new_num_max);
     info.mem = stream->mem;
 
-    res_trav (zh->service->global_res, "mapdb", &info, map_basenames_func);
+    res_trav (zh->session_res, "mapdb", &info, map_basenames_func);
     
     for (i = 0; i<p->num_bases; i++)
        if (p->basenames[i] && p->new_num_bases < p->new_num_max)
@@ -545,33 +857,70 @@ void map_basenames (ZebraHandle zh, ODR stream,
     *num_bases = info.new_num_bases;
     *basenames = info.new_basenames;
     for (i = 0; i<*num_bases; i++)
-       logf (LOG_LOG, "base %s", (*basenames)[i]);
+       yaz_log (YLOG_DEBUG, "base %s", (*basenames)[i]);
 }
 
-int zebra_select_database (ZebraHandle zh, const char *basename)
+ZEBRA_RES zebra_select_database (ZebraHandle zh, const char *basename)
 {
+    ZEBRA_CHECK_HANDLE(zh);
+
+    yaz_log(log_level, "zebra_select_database %s",basename);
+    assert(basename);
     return zebra_select_databases (zh, 1, &basename);
 }
 
-int zebra_select_databases (ZebraHandle zh, int num_bases,
-                            const char **basenames)
+ZEBRA_RES zebra_select_databases (ZebraHandle zh, int num_bases,
+                                 const char **basenames)
 {
     int i;
     const char *cp;
     int len = 0;
     char *new_reg = 0;
+
+    ZEBRA_CHECK_HANDLE(zh);
+    assert(basenames);
+
+    yaz_log(log_level, "zebra_select_databases n=%d [0]=%s",
+                   num_bases,basenames[0]);
+    zh->errCode = 0;
     
     if (num_bases < 1)
     {
-        zh->errCode = 23;
-        return -1;
+        zh->errCode = YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP;
+        return ZEBRA_FAIL;
+    }
+
+    /* Check if the user has access to all databases (Seb) */
+    /* You could argue that this should happen later, after we have
+     * determined that the database(s) exist. */
+    if (zh->dbaccesslist) {
+       for (i = 0; i < num_bases; i++) {
+           const char *db = basenames[i];
+           char *p, *pp;
+           for (p = zh->dbaccesslist; p && *p; p = pp) {
+               int len;
+               if ((pp = strchr(p, '+'))) {
+                   len = pp - p;
+                   pp++;
+               }
+               else
+                   len = strlen(p);
+               if (len == strlen(db) && !strncmp(db, p, len))
+                   break;
+           }
+           if (!p) {
+               zh->errCode = YAZ_BIB1_ACCESS_TO_SPECIFIED_DATABASE_DENIED;
+               return ZEBRA_FAIL;
+           }
+       }
     }
+
     for (i = 0; i < zh->num_basenames; i++)
-        xfree (zh->basenames[i]);
-    xfree (zh->basenames);
+        xfree(zh->basenames[i]);
+    xfree(zh->basenames);
     
     zh->num_basenames = num_bases;
-    zh->basenames = xmalloc (zh->num_basenames * sizeof(*zh->basenames));
+    zh->basenames = xmalloc(zh->num_basenames * sizeof(*zh->basenames));
     for (i = 0; i < zh->num_basenames; i++)
         zh->basenames[i] = xstrdup (basenames[i]);
 
@@ -579,7 +928,7 @@ int zebra_select_databases (ZebraHandle zh, int num_bases,
     if (cp)
     {
         len = cp - basenames[0];
-        new_reg = xmalloc (len + 1);
+        new_reg = xmalloc(len + 1);
         memcpy (new_reg, basenames[0], len);
         new_reg[len] = '\0';
     }
@@ -594,13 +943,13 @@ int zebra_select_databases (ZebraHandle zh, int num_bases,
         {
             if (!cp1)
             {
-                zh->errCode = 23;
+                zh->errCode = YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP;
                 return -1;
             }
             if (len != cp1 - basenames[i] ||
                 memcmp (basenames[i], new_reg, len))
             {
-                zh->errCode = 23;
+                zh->errCode = YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP;
                 return -1;
             }
         }
@@ -608,64 +957,98 @@ int zebra_select_databases (ZebraHandle zh, int num_bases,
         {
             if (cp1)
             {
-                zh->errCode = 23;
-                return -1;
+                zh->errCode = YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP;
+                return ZEBRA_FAIL;
             }
         }
     }
     zebra_select_register (zh, new_reg);
-    xfree (new_reg);
+    xfree(new_reg);
     if (!zh->res)
     {
-        zh->errCode = 109;
-        return -1;
+        zh->errCode = YAZ_BIB1_DATABASE_UNAVAILABLE;
+        return ZEBRA_FAIL;
     }
-    return 0;
+    if (!zh->lock_normal || !zh->lock_shadow)
+    {
+        zh->errCode = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+       return ZEBRA_FAIL;
+    }
+    return ZEBRA_OK;
+}
+
+ZEBRA_RES zebra_set_approx_limit(ZebraHandle zh, zint approx_limit)
+{
+    if (approx_limit == 0)
+       approx_limit = DEFAULT_APPROX_LIMIT;
+    zh->approx_limit = approx_limit;
+    return ZEBRA_OK;
 }
 
-void zebra_search_rpn (ZebraHandle zh, ODR decode, ODR stream,
-                      Z_RPNQuery *query, const char *setname, int *hits)
+ZEBRA_RES zebra_search_RPN(ZebraHandle zh, ODR o, Z_RPNQuery *query,
+                          const char *setname, zint *hits)
 {
+    ZEBRA_RES r;
+    
+    ZEBRA_CHECK_HANDLE(zh);
+
+    assert(o);
+    assert(query);
+    assert(hits);
+    assert(setname);
+    yaz_log(log_level, "zebra_search_rpn");
     zh->hits = 0;
     *hits = 0;
 
-    if (zebra_begin_read (zh))
-       return;
-    resultSetAddRPN (zh, decode, stream, query, 
-                     zh->num_basenames, zh->basenames, setname);
-
-    zebra_end_read (zh);
+    if (zebra_begin_read(zh) == ZEBRA_FAIL)
+       return ZEBRA_FAIL;
 
+    r = resultSetAddRPN(zh, odr_extract_mem(o), query, 
+                       zh->num_basenames, zh->basenames, setname);
+    zebra_end_read(zh);
     *hits = zh->hits;
+    return r;
 }
 
-void zebra_records_retrieve (ZebraHandle zh, ODR stream,
-                            const char *setname, Z_RecordComposition *comp,
-                            oid_value input_format, int num_recs,
-                            ZebraRetrievalRecord *recs)
+ZEBRA_RES zebra_records_retrieve(ZebraHandle zh, ODR stream,
+                                const char *setname,
+                                Z_RecordComposition *comp,
+                                oid_value input_format, int num_recs,
+                                ZebraRetrievalRecord *recs)
 {
-    ZebraPosSet poset;
-    int i, *pos_array;
+    ZebraMetaRecord *poset;
+    int i;
+    ZEBRA_RES ret = ZEBRA_OK;
+    zint *pos_array;
+
+    ZEBRA_CHECK_HANDLE(zh);
+    assert(stream);
+    assert(setname);
+    assert(recs);
+    assert(num_recs>0);
+
+    yaz_log(log_level, "zebra_records_retrieve n=%d", num_recs);
 
     if (!zh->res)
     {
-        zh->errCode = 30;
-        zh->errString = odr_strdup (stream, setname);
-        return;
+       zebra_setError(zh, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
+                      setname);
+        return ZEBRA_FAIL;
     }
+    
+    if (zebra_begin_read (zh) == ZEBRA_FAIL)
+       return ZEBRA_FAIL;
 
-    if (zebra_begin_read (zh))
-       return;
-
-    pos_array = (int *) xmalloc (num_recs * sizeof(*pos_array));
+    pos_array = (zint *) xmalloc(num_recs * sizeof(*pos_array));
     for (i = 0; i<num_recs; i++)
        pos_array[i] = recs[i].position;
-    poset = zebraPosSetCreate (zh, setname, num_recs, pos_array);
+    poset = zebra_meta_records_create(zh, setname, num_recs, pos_array);
     if (!poset)
     {
-        logf (LOG_DEBUG, "zebraPosSetCreate error");
-        zh->errCode = 30;
-        zh->errString = nmem_strdup (stream->mem, setname);
+        yaz_log (YLOG_DEBUG, "zebraPosSetCreate error");
+       zebra_setError(zh, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
+                      setname);
+       ret = ZEBRA_FAIL;
     }
     else
     {
@@ -681,72 +1064,168 @@ void zebra_records_retrieve (ZebraHandle zh, ODR stream,
            }
            else if (poset[i].sysno)
            {
+               char *buf;
+               int len;
+               zebra_snippets *hit_snippet = zebra_snippets_create();
+
+               zebra_snippets_hit_vector(zh, setname, poset[i].sysno, 
+                                         hit_snippet);
+
                recs[i].errCode =
-                   zebra_record_fetch (zh, poset[i].sysno, poset[i].score,
-                                       stream, input_format, comp,
-                                       &recs[i].format, &recs[i].buf,
-                                       &recs[i].len,
-                                       &recs[i].base);
-               recs[i].errString = NULL;
+                   zebra_record_fetch(zh, poset[i].sysno, poset[i].score,
+                                      hit_snippet,
+                                      stream, input_format, comp,
+                                      &recs[i].format, &buf, &len,
+                                      &recs[i].base, &recs[i].errString);
+               
+               recs[i].len = len;
+               if (len > 0)
+               {
+                   recs[i].buf = (char*) odr_malloc(stream, len);
+                   memcpy(recs[i].buf, buf, len);
+               }
+               else
+                   recs[i].buf = buf;
+                recs[i].score = poset[i].score;
+                recs[i].sysno = poset[i].sysno;
+               zebra_snippets_destroy(hit_snippet);
            }
            else
            {
-               char num_str[20];
-
-               sprintf (num_str, "%d", pos_array[i]);  
-               zh->errCode = 13;
-                zh->errString = odr_strdup (stream, num_str);
-                break;
+               /* only need to set it once */
+               if (pos_array[i] < zh->approx_limit && ret == ZEBRA_OK)
+               {
+                   zebra_setError_zint(zh,
+                                       YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE,
+                                       pos_array[i]);
+                   ret = ZEBRA_FAIL;
+                   break;
+               }
+               recs[i].buf = 0;  /* no record and no error issued */
+               recs[i].len = 0;
+               recs[i].errCode = 0;
+               recs[i].format = VAL_NONE;
+               recs[i].sysno = 0;
            }
        }
-       zebraPosSetDestroy (zh, poset, num_recs);
+       zebra_meta_records_destroy(zh, poset, num_recs);
     }
     zebra_end_read (zh);
-    xfree (pos_array);
+    xfree(pos_array);
+    return ret;
 }
 
-void zebra_scan (ZebraHandle zh, ODR stream, Z_AttributesPlusTerm *zapt,
-                oid_value attributeset,
-                int *position, int *num_entries, ZebraScanEntry **entries,
-                int *is_partial)
+ZEBRA_RES zebra_scan_PQF(ZebraHandle zh, ODR stream, const char *query,
+                        int *position,
+                        int *num_entries, ZebraScanEntry **entries,
+                        int *is_partial,
+                        const char *setname)
 {
-    if (zebra_begin_read (zh))
+    YAZ_PQF_Parser pqf_parser = yaz_pqf_create ();
+    Z_AttributesPlusTerm *zapt;
+    int *attributeSet;
+    ZEBRA_RES res;
+    
+    if (!(zapt = yaz_pqf_scan(pqf_parser, stream, &attributeSet, query)))
+    {
+       res = ZEBRA_FAIL;
+       zh->errCode = YAZ_BIB1_SCAN_MALFORMED_SCAN;
+    }
+    else
+       res = zebra_scan(zh, stream, zapt, VAL_BIB1,
+                        position, num_entries, entries, is_partial,
+                        setname);
+    yaz_pqf_destroy (pqf_parser);
+    return res;
+}
+
+ZEBRA_RES zebra_scan(ZebraHandle zh, ODR stream, Z_AttributesPlusTerm *zapt,
+                    oid_value attributeset,
+                    int *position,
+                    int *num_entries, ZebraScanEntry **entries,
+                    int *is_partial,
+                    const char *setname)
+{
+    ZEBRA_RES res;
+    RSET limit_rset = 0;
+
+    ZEBRA_CHECK_HANDLE(zh);
+
+    assert(stream);
+    assert(zapt);
+    assert(position);
+    assert(num_entries);
+    assert(is_partial);
+    assert(entries);
+    yaz_log(log_level, "zebra_scan");
+
+    if (zebra_begin_read (zh) == ZEBRA_FAIL)
     {
        *entries = 0;
        *num_entries = 0;
-       return;
+       return ZEBRA_FAIL;
     }
-    rpn_scan (zh, stream, zapt, attributeset,
-             zh->num_basenames, zh->basenames, position,
-             num_entries, entries, is_partial);
-    zebra_end_read (zh);
+    if (setname)
+    {
+       limit_rset = resultSetRef(zh, setname);
+       if (!limit_rset)
+       {
+           zebra_setError(zh, 
+                          YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
+                          setname);
+           zebra_end_read (zh);
+           return ZEBRA_FAIL;
+       }
+    }
+    res = rpn_scan(zh, stream, zapt, attributeset,
+                   zh->num_basenames, zh->basenames, position,
+                   num_entries, entries, is_partial, limit_rset);
+    zebra_end_read(zh);
+    return res;
 }
 
-void zebra_sort (ZebraHandle zh, ODR stream,
-                int num_input_setnames, const char **input_setnames,
-                const char *output_setname, Z_SortKeySpecList *sort_sequence,
-                int *sort_status)
+ZEBRA_RES zebra_sort (ZebraHandle zh, ODR stream,
+                     int num_input_setnames, const char **input_setnames,
+                     const char *output_setname,
+                     Z_SortKeySpecList *sort_sequence,
+                     int *sort_status)
 {
-    if (zebra_begin_read (zh))
-       return;
-    resultSetSort (zh, stream->mem, num_input_setnames, input_setnames,
-                  output_setname, sort_sequence, sort_status);
+    ZEBRA_RES res;
+    ZEBRA_CHECK_HANDLE(zh);
+    assert(stream);
+    assert(num_input_setnames>0);
+    assert(input_setnames);
+    assert(sort_sequence);
+    assert(sort_status);
+    yaz_log(log_level, "zebra_sort");
+
+    if (zebra_begin_read(zh) == ZEBRA_FAIL)
+       return ZEBRA_FAIL;
+    res = resultSetSort(zh, stream->mem, num_input_setnames, input_setnames,
+                       output_setname, sort_sequence, sort_status);
     zebra_end_read(zh);
+    return res;
 }
 
-int zebra_deleleResultSet(ZebraHandle zh, int function,
+int zebra_deleteResultSet(ZebraHandle zh, int function,
                          int num_setnames, char **setnames,
                          int *statuses)
 {
     int i, status;
+    ASSERTZH;
+    assert(statuses);
+    yaz_log(log_level, "zebra_deleteResultSet n=%d",num_setnames);
+
     if (zebra_begin_read(zh))
        return Z_DeleteStatus_systemProblemAtTarget;
     switch (function)
     {
-    case Z_DeleteRequest_list:
+    case Z_DeleteResultSetRequest_list:
+       assert(num_setnames>0);
+       assert(setnames);
        resultSetDestroy (zh, num_setnames, setnames, statuses);
        break;
-    case Z_DeleteRequest_all:
+    case Z_DeleteResultSetRequest_all:
        resultSetDestroy (zh, -1, 0, statuses);
        break;
     }
@@ -760,102 +1239,317 @@ int zebra_deleleResultSet(ZebraHandle zh, int function,
 
 int zebra_errCode (ZebraHandle zh)
 {
-    return zh->errCode;
+    if (zh)
+    {
+        yaz_log(log_level, "zebra_errCode: %d",zh->errCode);
+        return zh->errCode;
+    }
+    yaz_log(log_level, "zebra_errCode: o");
+    return 0; 
 }
 
 const char *zebra_errString (ZebraHandle zh)
 {
-    return diagbib1_str (zh->errCode);
+    const char *e = 0;
+    if (zh)
+        e= diagbib1_str (zh->errCode);
+    yaz_log(log_level, "zebra_errString: %s",e);
+    return e;
 }
 
 char *zebra_errAdd (ZebraHandle zh)
 {
-    return zh->errString;
+    char *a = 0;
+    if (zh)
+        a= zh->errString;
+    yaz_log(log_level, "zebra_errAdd: %s",a);
+    return a;
 }
 
-int zebra_auth (ZebraHandle zh, const char *user, const char *pass)
+ZEBRA_RES zebra_auth (ZebraHandle zh, const char *user, const char *pass)
 {
-    ZebraService zs = zh->service;
-    if (!zs->passwd_db || !passwd_db_auth (zs->passwd_db, user, pass))
-    {
-        logf(LOG_APP,"AUTHOK:%s", user?user:"ANONYMOUS");
-       return 0;
-    }
+    const char *p;
+    const char *astring;
+    char u[40];
+    ZebraService zs;
+
+    ZEBRA_CHECK_HANDLE(zh);
+
+    zs = zh->service;
+    
+    sprintf(u, "perm.%.30s", user ? user : "anonymous");
+    p = res_get(zs->global_res, u);
+    xfree(zh->user_perm);
+    zh->user_perm = xstrdup(p ? p : "r");
+
+    /* Determine database access list */
+    astring = res_get(zs->dbaccess, user ? user : "anonymous");
+    if (astring)
+       zh->dbaccesslist = xstrdup(astring);
+    else
+       zh->dbaccesslist = 0;
 
-    logf(LOG_APP,"AUTHFAIL:%s", user?user:"ANONYMOUS");
-    return 1;
+    /* users that don't require a password .. */
+    if (zh->user_perm && strchr(zh->user_perm, 'a'))
+       return ZEBRA_OK;
+    
+    if (!zs->passwd_db || !passwd_db_auth (zs->passwd_db, user, pass))
+       return ZEBRA_OK;
+    return ZEBRA_FAIL;
 }
 
-void zebra_admin_import_begin (ZebraHandle zh, const char *database)
+ZEBRA_RES zebra_admin_import_begin (ZebraHandle zh, const char *database,
+                               const char *record_type)
 {
-    zebra_begin_trans (zh);
-    xfree (zh->admin_databaseName);
-    zh->admin_databaseName = xstrdup(database);
+    yaz_log(log_level, "zebra_admin_import_begin db=%s rt=%s", 
+                    database, record_type);
+    if (zebra_select_database(zh, database) == ZEBRA_FAIL)
+        return ZEBRA_FAIL;
+    return zebra_begin_trans(zh, 1);
 }
 
-void zebra_admin_import_end (ZebraHandle zh)
+ZEBRA_RES zebra_admin_import_end (ZebraHandle zh)
 {
-    zebra_end_trans (zh);
+    ZEBRA_CHECK_HANDLE(zh);
+    yaz_log(log_level, "zebra_admin_import_end");
+    return zebra_end_trans(zh);
 }
 
-void zebra_admin_import_segment (ZebraHandle zh, Z_Segment *segment)
+ZEBRA_RES zebra_admin_import_segment (ZebraHandle zh, Z_Segment *segment)
 {
-    int sysno;
+    ZEBRA_RES res = ZEBRA_OK;
+    SYSNO sysno;
     int i;
+    ZEBRA_CHECK_HANDLE(zh);
+    yaz_log(log_level, "zebra_admin_import_segment");
+
     for (i = 0; i<segment->num_segmentRecords; i++)
     {
        Z_NamePlusRecord *npr = segment->segmentRecords[i];
-       const char *databaseName = npr->databaseName;
 
-       if (!databaseName)
-           databaseName = zh->admin_databaseName;
-       printf ("--------------%d--------------------\n", i);
        if (npr->which == Z_NamePlusRecord_intermediateFragment)
        {
            Z_FragmentSyntax *fragment = npr->u.intermediateFragment;
            if (fragment->which == Z_FragmentSyntax_notExternallyTagged)
            {
                Odr_oct *oct = fragment->u.notExternallyTagged;
-               printf ("%.*s", (oct->len > 100 ? 100 : oct->len) ,
-                       oct->buf);
-               
                sysno = 0;
-               extract_rec_in_mem (zh, "grs.sgml",
-                                   oct->buf, oct->len,
-                                   databaseName,
-                                   0 /* delete_flag */,
-                                   0 /* test_mode */,
-                                   &sysno /* sysno */,
-                                   1 /* store_keys */,
-                                   1 /* store_data */,
-                                   0 /* match criteria */);
+               
+               if (zebra_update_record(zh, 
+                                       0, /* record Type */
+                                       &sysno,
+                                       0, /* match */
+                                       0, /* fname */
+                                       (const char *) oct->buf, oct->len,
+                                       0) == ZEBRA_FAIL)
+                   res = ZEBRA_FAIL;
            }
        }
     }
+    return res;
 }
 
-void zebra_admin_create (ZebraHandle zh, const char *database)
+ZEBRA_RES zebra_admin_exchange_record(ZebraHandle zh,
+                                     const char *rec_buf,
+                                     size_t rec_len,
+                                     const char *recid_buf, size_t recid_len,
+                                     int action)
+    /* 1 = insert. Fail it already exists */
+    /* 2 = replace. Fail it does not exist */
+    /* 3 = delete. Fail if does not exist */
+    /* 4 = update. Insert/replace */
 {
-    ZebraService zs;
-
-    zebra_begin_trans (zh);
-
-    zs = zh->service;
-    /* announce database */
-    if (zebraExplain_newDatabase (zh->reg->zei, database, 0 
-                                  /* explainDatabase */))
+    ZEBRA_RES res;
+    SYSNO sysno = 0;
+    char *rinfo = 0;
+    char recid_z[256];
+    int db_ord;
+    ZEBRA_CHECK_HANDLE(zh);
+    assert(action>0 && action <=4);
+    assert(rec_buf);
+
+    yaz_log(log_level, "zebra_admin_exchange_record ac=%d", action);
+
+    if (!recid_buf || recid_len <= 0 || recid_len >= sizeof(recid_z))
     {
-       zh->errCode = 224;
-       zh->errString = "Database already exist";
+       zebra_setError(zh, YAZ_BIB1_ES_IMMEDIATE_EXECUTION_FAILED,
+                      "no record ID or empty record ID");
+        return ZEBRA_FAIL;
     }
-    zebra_end_trans (zh);
-}
+
+    memcpy (recid_z, recid_buf, recid_len);
+    recid_z[recid_len] = 0;
+
+    if (zebra_begin_trans(zh, 1) == ZEBRA_FAIL)
+       return ZEBRA_FAIL;
+
+    db_ord = zebraExplain_get_database_ord(zh->reg->zei);
+    rinfo = dict_lookup_ord(zh->reg->matchDict, db_ord, recid_z);
+    if (rinfo)
+    {
+        if (action == 1)  /* fail if insert */
+        {
+           if (zebra_end_trans(zh) != ZEBRA_OK)
+               yaz_log(YLOG_WARN, "zebra_end_trans failed");
+           zebra_setError(zh, YAZ_BIB1_ES_IMMEDIATE_EXECUTION_FAILED,
+                          "Cannot insert record: already exist");
+           return ZEBRA_FAIL;
+       }
+
+        memcpy (&sysno, rinfo+1, sizeof(sysno));
+    }
+    else
+    {
+        if (action == 2 || action == 3) /* fail if delete or update */
+        {
+           if (zebra_end_trans(zh) != ZEBRA_OK)
+               yaz_log(YLOG_WARN, "zebra_end_trans failed");
+           zebra_setError(zh, YAZ_BIB1_ES_IMMEDIATE_EXECUTION_FAILED,
+                          "Cannot delete/update record: does not exist");
+            return ZEBRA_FAIL;
+       }
+       action = 1;  /* make it an insert (if it's an update).. */
+    }
+    res = zebra_buffer_extract_record(zh, rec_buf, rec_len,
+                                      action == 3 ? 1 : 0 /* delete flag */,
+                                      0, /* test mode */
+                                      0, /* recordType */
+                                      &sysno, 
+                                      0, /* match */
+                                      0, /* fname */
+                                      0, /* force update */
+                                      1  /* allow update */
+       );
+    if (res == ZEBRA_FAIL)
+    {
+       zebra_setError(zh, YAZ_BIB1_ES_IMMEDIATE_EXECUTION_FAILED,
+                      "Unable to parse record");
+    }
+    if (action == 1)
+    {
+        dict_insert_ord(zh->reg->matchDict, db_ord, recid_z,
+                       sizeof(sysno), &sysno);
+    }
+    else if (action == 3)
+    {
+        dict_delete_ord(zh->reg->matchDict, db_ord, recid_z);
+    }
+    if (zebra_end_trans(zh) != ZEBRA_OK)
+    {
+       yaz_log(YLOG_WARN, "zebra_end_trans failed");
+       res = ZEBRA_FAIL;
+    }
+    return res;
+}
+
+int delete_w_handle(const char *info, void *handle)
+{
+    ZebraHandle zh = (ZebraHandle) handle;
+    ISAM_P pos;
+    ASSERTZH;
+
+    if (*info == sizeof(pos))
+    {
+       memcpy (&pos, info+1, sizeof(pos));
+       isamb_unlink(zh->reg->isamb, pos);
+    }
+    return 0;
+}
+
+static int delete_SU_handle(void *handle, int ord)
+{
+    ZebraHandle zh = (ZebraHandle) handle;
+    char ord_buf[20];
+    int ord_len;
+
+    ord_len = key_SU_encode (ord, ord_buf);
+    ord_buf[ord_len] = '\0';
+
+    assert (zh->reg->isamb);
+    dict_delete_subtree(zh->reg->dict, ord_buf,
+                       zh, delete_w_handle);
+    return 0;
+}
+
+ZEBRA_RES zebra_drop_database(ZebraHandle zh, const char *db)
+{
+    ZEBRA_RES ret = ZEBRA_OK;
+
+    yaz_log(log_level, "zebra_drop_database %s", db);
+    ZEBRA_CHECK_HANDLE(zh);
+
+    if (zebra_select_database (zh, db) == ZEBRA_FAIL)
+        return ZEBRA_FAIL;
+    if (zebra_begin_trans (zh, 1) == ZEBRA_FAIL)
+        return ZEBRA_FAIL;
+    if (zh->reg->isamb)
+    {
+       int db_ord;
+       if (zebraExplain_curDatabase (zh->reg->zei, db))
+        {
+            zebra_setError(zh, YAZ_BIB1_DATABASE_DOES_NOT_EXIST, db);
+            ret = ZEBRA_FAIL;
+        }
+        else
+        {
+            db_ord = zebraExplain_get_database_ord(zh->reg->zei);
+            dict_delete_subtree_ord(zh->reg->matchDict, db_ord,
+                                    0 /* handle */, 0 /* func */);
+            zebraExplain_trav_ord(zh->reg->zei, zh, delete_SU_handle);
+            zebraExplain_removeDatabase(zh->reg->zei, zh);
+            zebra_remove_file_match(zh);
+        }
+    }
+    else
+    {
+       yaz_log(YLOG_WARN, "drop database only supported for isam:b");
+       zebra_setError(zh, YAZ_BIB1_ES_IMMEDIATE_EXECUTION_FAILED,
+                      "drop database only supported for isam:b");
+       ret = ZEBRA_FAIL;
+    }
+    if (zebra_end_trans (zh) != ZEBRA_OK)
+    {
+       yaz_log(YLOG_WARN, "zebra_end_trans failed");
+       ret = ZEBRA_FAIL;
+    }
+    return ret;
+}
+
+ZEBRA_RES zebra_create_database (ZebraHandle zh, const char *db)
+{
+    yaz_log(log_level, "zebra_create_database %s", db);
+    ZEBRA_CHECK_HANDLE(zh);
+    assert(db);
+
+    if (zebra_select_database (zh, db) == ZEBRA_FAIL)
+        return ZEBRA_FAIL;
+    if (zebra_begin_trans (zh, 1))
+        return ZEBRA_FAIL;
+
+    /* announce database */
+    if (zebraExplain_newDatabase (zh->reg->zei, db, 0 
+                                  /* explainDatabase */))
+    {
+        if (zebra_end_trans (zh) != ZEBRA_OK)
+       {
+           yaz_log(YLOG_WARN, "zebra_end_trans failed");
+       }
+       zebra_setError(zh, YAZ_BIB1_ES_IMMEDIATE_EXECUTION_FAILED, db);
+       return ZEBRA_FAIL;
+    }
+    return zebra_end_trans (zh);
+}
 
 int zebra_string_norm (ZebraHandle zh, unsigned reg_id,
                       const char *input_str, int input_len,
                       char *output_str, int output_len)
 {
     WRBUF wrbuf;
+    ASSERTZH;
+    assert(input_str);
+    assert(output_str);
+    yaz_log(log_level, "zebra_string_norm ");
+
     if (!zh->reg->zebra_maps)
        return -1;
     wrbuf = zebra_replace(zh->reg->zebra_maps, reg_id, "",
@@ -870,30 +1564,44 @@ int zebra_string_norm (ZebraHandle zh, unsigned reg_id,
     return wrbuf_len(wrbuf);
 }
 
-
-void zebra_set_state (ZebraHandle zh, int val, int seqno)
+/** \brief set register state (state*.LCK)
+    \param zh Zebra handle
+    \param val state
+    \param seqno sequence number
+    
+    val is one of:
+    d=writing to shadow(dirty)
+    o=no writing, 
+    c=commit
+*/
+static void zebra_set_state (ZebraHandle zh, int val, int seqno)
 {
     char state_fname[256];
     char *fname;
     long p = getpid();
     FILE *f;
+    ASSERTZH;
+    yaz_log(log_level, "zebra_set_state v=%d seq=%d", val, seqno);
 
     sprintf (state_fname, "state.%s.LCK", zh->reg_name);
     fname = zebra_mk_fname (res_get(zh->res, "lockDir"), state_fname);
     f = fopen (fname, "w");
 
-    yaz_log (LOG_LOG, "%c %d %ld", val, seqno, p);
+    yaz_log (YLOG_DEBUG, "zebra_set_state: %c %d %ld", val, seqno, p);
     fprintf (f, "%c %d %ld\n", val, seqno, p);
     fclose (f);
-    xfree (fname);
+    xfree(fname);
 }
 
-void zebra_get_state (ZebraHandle zh, char *val, int *seqno)
+static void zebra_get_state (ZebraHandle zh, char *val, int *seqno)
 {
     char state_fname[256];
     char *fname;
     FILE *f;
 
+    ASSERTZH;
+    yaz_log(log_level, "zebra_get_state ");
+
     sprintf (state_fname, "state.%s.LCK", zh->reg_name);
     fname = zebra_mk_fname (res_get(zh->res, "lockDir"), state_fname);
     f = fopen (fname, "r");
@@ -905,346 +1613,875 @@ void zebra_get_state (ZebraHandle zh, char *val, int *seqno)
         fscanf (f, "%c %d", val, seqno);
         fclose (f);
     }
-    xfree (fname);
+    xfree(fname);
 }
 
-static int zebra_begin_read (ZebraHandle zh)
+ZEBRA_RES zebra_begin_read (ZebraHandle zh)
 {
-    int dirty = 0;
-    char val;
-    int seqno;
+    return zebra_begin_trans(zh, 0);
+}
 
-    assert (zh->res);
+ZEBRA_RES zebra_end_read (ZebraHandle zh)
+{
+    return zebra_end_trans(zh);
+}
 
-    (zh->trans_no)++;
+static void read_res_for_transaction(ZebraHandle zh)
+{
+    const char *group = res_get(zh->res, "group");
+    const char *v;
+    /* FIXME - do we still use groups ?? */
+    
+    zh->m_group = group;
+    v = res_get_prefix(zh->res, "followLinks", group, "1");
+    zh->m_follow_links = atoi(v);
 
-    if (zh->trans_no != 1)
-    {
-        zebra_flush_reg (zh);
-        return 0;
-    }
-    if (!zh->res)
-    {
-        (zh->trans_no)--;
-        zh->errCode = 109;
-        return -1;
-    }
-    zebra_get_state (zh, &val, &seqno);
-    if (val == 'd')
-        val = 'o';
+    zh->m_record_id = res_get_prefix(zh->res, "recordId", group, 0);
+    zh->m_record_type = res_get_prefix(zh->res, "recordType", group, 0);
 
-    if (!zh->reg)
-        dirty = 1;
-    else if (seqno != zh->reg->seqno)
-    {
-        yaz_log (LOG_LOG, "reopen seqno cur/old %d/%d",
-                 seqno, zh->reg->seqno);
-        dirty = 1;
-    }
-    else if (zh->reg->last_val != val)
-    {
-        yaz_log (LOG_LOG, "reopen last cur/old %d/%d",
-                 val, zh->reg->last_val);
-        dirty = 1;
-    }
-    if (!dirty)
-        return 0;
+    v = res_get_prefix(zh->res, "storeKeys", group, "1");
+    zh->m_store_keys = atoi(v);
 
-    if (val == 'c')
-        zebra_lock_r (zh->lock_shadow);
-    else
-        zebra_lock_r (zh->lock_normal);
-    
-    if (zh->reg)
-        zebra_register_close (zh->service, zh->reg);
-    zh->reg = zebra_register_open (zh->service, zh->reg_name,
-                                   0, val == 'c' ? 1 : 0,
-                                   zh->res, zh->path_reg);
-    if (!zh->reg)
-    {
-        zh->errCode = 109;
-        return -1;
-    }
-    zh->reg->last_val = val;
-    zh->reg->seqno = seqno;
+    v = res_get_prefix(zh->res, "storeData", group, "1");
+    zh->m_store_data = atoi(v);
 
-    return 0;
-}
-
-static void zebra_end_read (ZebraHandle zh)
-{
-    (zh->trans_no)--;
+    v = res_get_prefix(zh->res, "explainDatabase", group, "0");
+    zh->m_explain_database = atoi(v);
 
-    if (zh->trans_no != 0)
-        return;
+    v = res_get_prefix(zh->res, "openRW", group, "1");
+    zh->m_flag_rw = atoi(v);
 
-    zebra_unlock (zh->lock_normal);
-    zebra_unlock (zh->lock_shadow);
+    v = res_get_prefix(zh->res, "fileVerboseLimit", group, "100000");
+    zh->m_file_verbose_limit = atoi(v);
 }
 
-void zebra_begin_trans (ZebraHandle zh)
+ZEBRA_RES zebra_begin_trans(ZebraHandle zh, int rw)
 {
-    int pass;
-    int seqno = 0;
-    char val = '?';
-    const char *rval = 0;
-
-    assert (zh->res);
+    ZEBRA_CHECK_HANDLE(zh);
+    zebra_select_default_database(zh);
+    if (!zh->res)
+    {
+       zebra_setError(zh, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
+                      "zebra_begin_trans: no database selected");
+        return ZEBRA_FAIL;
+    }
+    ASSERTZHRES;
+    yaz_log(log_level, "zebra_begin_trans rw=%d",rw);
 
-    (zh->trans_no++);
-    if (zh->trans_no != 1)
+    if (zh->user_perm)
     {
-        return;
+       if (rw && !strchr(zh->user_perm, 'w'))
+       {
+           zebra_setError(
+               zh,
+               YAZ_BIB1_ES_PERMISSION_DENIED_ON_ES_CANNOT_MODIFY_OR_DELETE,
+               0);
+           return ZEBRA_FAIL;
+       }
     }
-    
-    yaz_log (LOG_LOG, "zebra_begin_trans");
-#if HAVE_SYS_TIMES_H
-    times (&zh->tms1);
-#endif
-    
-    /* lock */
-    if (zh->shadow_enable)
-        rval = res_get (zh->res, "shadow");
 
-    for (pass = 0; pass < 2; pass++)
+    assert (zh->res);
+    if (rw)
     {
+        int seqno = 0;
+        char val = '?';
+        const char *rval = 0;
+        
+        (zh->trans_no++);
+        if (zh->trans_w_no)
+       {
+           read_res_for_transaction(zh);
+            return 0;
+       }
+        if (zh->trans_no != 1)
+        {
+           zebra_setError(zh, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
+                          "zebra_begin_trans: no write trans within read");
+            return ZEBRA_FAIL;
+        }
+        if (zh->reg)
+       {
+            resultSetInvalidate (zh);
+            zebra_register_close(zh->service, zh->reg);
+       }
+        zh->trans_w_no = zh->trans_no;
+
+        zh->records_inserted = 0;
+        zh->records_updated = 0;
+        zh->records_deleted = 0;
+        zh->records_processed = 0;
+        
+#if HAVE_SYS_TIMES_H
+        times (&zh->tms1);
+#endif
+        /* lock */
+        if (zh->shadow_enable)
+            rval = res_get (zh->res, "shadow");
+        
         if (rval)
         {
-            zebra_lock_r (zh->lock_normal);
-            zebra_lock_w (zh->lock_shadow);
+            zebra_lock_r(zh->lock_normal);
+            zebra_lock_w(zh->lock_shadow);
         }
         else
         {
-            zebra_lock_w (zh->lock_normal);
-            zebra_lock_w (zh->lock_shadow);
+            zebra_lock_w(zh->lock_normal);
+            zebra_lock_w(zh->lock_shadow);
         }
-        
         zebra_get_state (zh, &val, &seqno);
-        if (val == 'c')
+        if (val != 'o')
         {
-            yaz_log (LOG_LOG, "previous transaction didn't finish commit");
+            /* either we didn't finish commit or shadow is dirty */
             zebra_unlock (zh->lock_shadow);
             zebra_unlock (zh->lock_normal);
-            zebra_commit (zh);
-            continue;
-        }
-        else if (val == 'd')
-        {
+            if (zebra_commit (zh))
+            {
+                zh->trans_no--;
+                zh->trans_w_no = 0;
+                return ZEBRA_FAIL;
+            }
             if (rval)
             {
-                BFiles bfs = bfs_create (res_get (zh->res, "shadow"),
-                                         zh->path_reg);
-                yaz_log (LOG_LOG, "previous transaction didn't reach commit");
-                bf_commitClean (bfs, rval);
-                bfs_destroy (bfs);
+                zebra_lock_r(zh->lock_normal);
+                zebra_lock_w(zh->lock_shadow);
             }
             else
             {
-                yaz_log (LOG_WARN, "your previous transaction didn't finish");
+                zebra_lock_w(zh->lock_normal);
+                zebra_lock_w(zh->lock_shadow);
             }
         }
-        break;
+
+        zebra_set_state (zh, 'd', seqno);
+        
+        zh->reg = zebra_register_open(zh->service, zh->reg_name,
+                                     1, rval ? 1 : 0, zh->res,
+                                     zh->path_reg);
+        if (zh->reg)
+            zh->reg->seqno = seqno;
+        else
+        {
+            zebra_set_state (zh, 'o', seqno);
+            
+            zebra_unlock (zh->lock_shadow);
+            zebra_unlock (zh->lock_normal);
+
+            zh->trans_no--;
+            zh->trans_w_no = 0;
+
+           zebra_setError(zh, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
+                          "zebra_begin_trans: cannot open register");
+            yaz_log(YLOG_FATAL, "%s", zh->errString);
+            return ZEBRA_FAIL;
+        }
+       zebraExplain_curDatabase(zh->reg->zei, zh->basenames[0]);
     }
-    if (pass == 2)
+    else
     {
-        yaz_log (LOG_FATAL, "zebra_begin_trans couldn't finish commit");
-        abort();
-        return;
+        int dirty = 0;
+        char val;
+        int seqno;
+        
+        (zh->trans_no)++;
+        
+        if (zh->trans_no != 1)
+        {
+            return zebra_flush_reg (zh);
+        }
+#if HAVE_SYS_TIMES_H
+        times (&zh->tms1);
+#endif
+        if (!zh->res)
+        {
+            (zh->trans_no)--;
+            zh->errCode = YAZ_BIB1_DATABASE_UNAVAILABLE;
+            return ZEBRA_FAIL;
+        }
+        if (!zh->lock_normal || !zh->lock_shadow)
+        {
+            (zh->trans_no)--;
+            zh->errCode = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+            return ZEBRA_FAIL;
+        }
+        zebra_get_state (zh, &val, &seqno);
+        if (val == 'd')
+            val = 'o';
+        
+        if (!zh->reg)
+            dirty = 1;
+        else if (seqno != zh->reg->seqno)
+        {
+            yaz_log (YLOG_DEBUG, "reopen seqno cur/old %d/%d",
+                     seqno, zh->reg->seqno);
+            dirty = 1;
+        }
+        else if (zh->reg->last_val != val)
+        {
+            yaz_log (YLOG_DEBUG, "reopen last cur/old %d/%d",
+                     val, zh->reg->last_val);
+            dirty = 1;
+        }
+        if (!dirty)
+            return ZEBRA_OK;
+        
+        if (val == 'c')
+            zebra_lock_r (zh->lock_shadow);
+        else
+            zebra_lock_r (zh->lock_normal);
+        
+        if (zh->reg)
+       {
+            resultSetInvalidate (zh);
+            zebra_register_close(zh->service, zh->reg);
+       }
+        zh->reg = zebra_register_open(zh->service, zh->reg_name,
+                                      0, val == 'c' ? 1 : 0,
+                                      zh->res, zh->path_reg);
+        if (!zh->reg)
+        {
+            zebra_unlock (zh->lock_normal);
+            zebra_unlock (zh->lock_shadow);
+            zh->trans_no--;
+            zh->errCode = YAZ_BIB1_DATABASE_UNAVAILABLE;
+            return ZEBRA_FAIL;
+        }
+        zh->reg->last_val = val;
+        zh->reg->seqno = seqno;
     }
-    zebra_set_state (zh, 'd', seqno);
+    read_res_for_transaction(zh);
+    return ZEBRA_OK;
+}
 
-    zh->reg = zebra_register_open (zh->service, zh->reg_name,
-                                   1, rval ? 1 : 0, zh->res,
-                                   zh->path_reg);
+ZEBRA_RES zebra_end_trans (ZebraHandle zh)
+{
+    ZebraTransactionStatus dummy;
 
-    zh->reg->seqno = seqno;
+    yaz_log(log_level, "zebra_end_trans");
+    ZEBRA_CHECK_HANDLE(zh);
+    return zebra_end_transaction(zh, &dummy);
 }
 
-void zebra_end_trans (ZebraHandle zh)
+ZEBRA_RES zebra_end_transaction (ZebraHandle zh, ZebraTransactionStatus *status)
 {
     char val;
     int seqno;
     const char *rval;
 
-    zh->trans_no--;
-    if (zh->trans_no != 0)
-        return;
-
-    yaz_log (LOG_LOG, "zebra_end_trans");
-    rval = res_get (zh->res, "shadow");
+    ZEBRA_CHECK_HANDLE(zh);
 
-    zebra_flush_reg (zh);
+    assert(status);
+    yaz_log(log_level, "zebra_end_transaction");
 
-    zebra_register_close (zh->service, zh->reg);
-    zh->reg = 0;
+    status->processed = 0;
+    status->inserted  = 0;
+    status->updated   = 0;
+    status->deleted   = 0;
+    status->utime     = 0;
+    status->stime     = 0;
 
-    zebra_get_state (zh, &val, &seqno);
-    if (val != 'd')
+    if (!zh->res || !zh->reg)
     {
-        BFiles bfs = bfs_create (rval, zh->path_reg);
-        yaz_log (LOG_LOG, "deleting shadow stuff val=%c", val);
-        bf_commitClean (bfs, rval);
-        bfs_destroy (bfs);
+       zebra_setError(zh, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
+                      "zebra_end_trans: no open transaction");
+        return ZEBRA_FAIL;
     }
-    if (!rval)
-        seqno++;
-    zebra_set_state (zh, 'o', seqno);
+    if (zh->trans_no != zh->trans_w_no)
+    {
+        zh->trans_no--;
+        if (zh->trans_no != 0)
+            return ZEBRA_OK;
+
+        /* release read lock */
 
-    zebra_unlock (zh->lock_shadow);
-    zebra_unlock (zh->lock_normal);
+        zebra_unlock (zh->lock_normal);
+        zebra_unlock (zh->lock_shadow);
+    }
+    else
+    {   /* release write lock */
+        zh->trans_no--;
+        zh->trans_w_no = 0;
+        
+        yaz_log (YLOG_DEBUG, "zebra_end_trans");
+        rval = res_get (zh->res, "shadow");
+        
+        zebraExplain_runNumberIncrement (zh->reg->zei, 1);
+        
+        zebra_flush_reg (zh);
+        
+        resultSetInvalidate (zh);
 
+        zebra_register_close(zh->service, zh->reg);
+        zh->reg = 0;
+        
+        yaz_log (YLOG_LOG, "Records: "ZINT_FORMAT" i/u/d "
+                       ZINT_FORMAT"/"ZINT_FORMAT"/"ZINT_FORMAT, 
+                 zh->records_processed, zh->records_inserted,
+                 zh->records_updated, zh->records_deleted);
+        
+        status->processed = zh->records_processed;
+        status->inserted = zh->records_inserted;
+        status->updated = zh->records_updated;
+        status->deleted = zh->records_deleted;
+        
+        zebra_get_state (zh, &val, &seqno);
+        if (val != 'd')
+        {
+            BFiles bfs = bfs_create (rval, zh->path_reg);
+            yaz_log (YLOG_DEBUG, "deleting shadow val=%c", val);
+            bf_commitClean (bfs, rval);
+            bfs_destroy (bfs);
+        }
+        if (!rval)
+            seqno++;
+        zebra_set_state (zh, 'o', seqno);
+        
+        zebra_unlock (zh->lock_shadow);
+        zebra_unlock (zh->lock_normal);
+        
+    }
 #if HAVE_SYS_TIMES_H
     times (&zh->tms2);
-    logf (LOG_LOG, "user/system: %ld/%ld",
-                    (long) (zh->tms2.tms_utime - zh->tms1.tms_utime),
-                    (long) (zh->tms2.tms_stime - zh->tms1.tms_stime));
-
+    yaz_log (log_level, "user/system: %ld/%ld",
+          (long) (zh->tms2.tms_utime - zh->tms1.tms_utime),
+          (long) (zh->tms2.tms_stime - zh->tms1.tms_stime));
+    
+    status->utime = (long) (zh->tms2.tms_utime - zh->tms1.tms_utime);
+    status->stime = (long) (zh->tms2.tms_stime - zh->tms1.tms_stime);
 #endif
+    return ZEBRA_OK;
 }
 
-void zebra_repository_update (ZebraHandle zh)
+ZEBRA_RES zebra_repository_update(ZebraHandle zh, const char *path)
 {
-    zebra_begin_trans (zh);
-    logf (LOG_LOG, "updating %s", zh->rGroup.path);
-    repositoryUpdate (zh);    
-    zebra_end_trans (zh);
+    ASSERTZH;
+    assert(path);
+    yaz_log (log_level, "updating %s", path);
+
+    if (zh->m_record_id && !strcmp (zh->m_record_id, "file"))
+        return zebra_update_file_match(zh, path);
+    else
+        return zebra_update_from_path(zh, path);
 }
 
-void zebra_repository_delete (ZebraHandle zh)
+ZEBRA_RES zebra_repository_delete(ZebraHandle zh, const char *path)
 {
-    logf (LOG_LOG, "deleting %s", zh->rGroup.path);
-    repositoryDelete (zh);
+    ASSERTZH;
+    assert(path);
+    yaz_log (log_level, "deleting %s", path);
+    return zebra_delete_from_path(zh, path);
 }
 
-void zebra_repository_show (ZebraHandle zh)
+ZEBRA_RES zebra_repository_show(ZebraHandle zh, const char *path)
 {
-    repositoryShow (zh);
+    ASSERTZH;
+    assert(path);
+    yaz_log(log_level, "zebra_repository_show");
+    repositoryShow (zh, path);
+    return ZEBRA_OK;
 }
 
-int zebra_commit (ZebraHandle zh)
+static ZEBRA_RES zebra_commit_ex(ZebraHandle zh, int clean_only)
 {
     int seqno;
     char val;
     const char *rval;
     BFiles bfs;
+    ZEBRA_RES res = ZEBRA_OK;
 
+    ASSERTZH;
+
+    zebra_select_default_database(zh);
     if (!zh->res)
     {
-        zh->errCode = 109;
-        return -1;
+        zh->errCode = YAZ_BIB1_DATABASE_UNAVAILABLE;
+        return ZEBRA_FAIL;
     }
-    rval = res_get (zh->res, "shadow");    
+    rval = res_get(zh->res, "shadow");    
     if (!rval)
     {
-        logf (LOG_WARN, "Cannot perform commit");
-        logf (LOG_WARN, "No shadow area defined");
-        return 0;
+        yaz_log (YLOG_WARN, "Cannot perform commit - No shadow area defined");
+        return ZEBRA_OK;
     }
 
-    zebra_lock_w (zh->lock_normal);
-    zebra_lock_r (zh->lock_shadow);
+    zebra_lock_w(zh->lock_normal);
+    zebra_lock_r(zh->lock_shadow);
 
-    bfs = bfs_create (res_get (zh->res, "register"), zh->path_reg);
+    bfs = bfs_create(res_get (zh->res, "register"), zh->path_reg);
+    if (!bfs)
+    {
+       zebra_unlock(zh->lock_shadow);
+       zebra_unlock(zh->lock_normal);
+        return ZEBRA_FAIL;
+    }
+    zebra_get_state(zh, &val, &seqno);
 
-    zebra_get_state (zh, &val, &seqno);
+    if (val == 'd')
+    {
+        yaz_log(YLOG_WARN, "previous transaction didn't reach commit");
+        clean_only = 1;
+    }
 
     if (rval && *rval)
         bf_cache (bfs, rval);
     if (bf_commitExists (bfs))
     {
-        zebra_set_state (zh, 'c', seqno);
-
-        logf (LOG_LOG, "commit start");
-#ifndef WIN32
-        sleep (2);
-#endif
-        bf_commitExec (bfs);
-#ifndef WIN32
-        sync ();
-#endif
-        logf (LOG_LOG, "commit clean");
-        bf_commitClean (bfs, rval);
-        seqno++;
-        zebra_set_state (zh, 'o', seqno);
+        if (clean_only)
+            zebra_set_state(zh, 'd', seqno);
+        else
+        {
+            zebra_set_state(zh, 'c', seqno);
+            
+            yaz_log(YLOG_DEBUG, "commit start");
+            if (bf_commitExec (bfs))
+                res = ZEBRA_FAIL;
+        }
+        if (res == ZEBRA_OK)
+        {
+            seqno++;
+            zebra_set_state(zh, 'o', seqno);
+            
+            zebra_unlock(zh->lock_shadow);
+            zebra_unlock(zh->lock_normal);
+            
+            zebra_lock_w(zh->lock_shadow);
+            bf_commitClean(bfs, rval);
+            zebra_unlock(zh->lock_shadow);
+        }
+        else
+        {
+            zebra_unlock(zh->lock_shadow);
+            zebra_unlock(zh->lock_normal);
+            yaz_log(YLOG_WARN, "zebra_commit: failed");
+        }
     }
     else
     {
-        logf (LOG_LOG, "nothing to commit");
+       zebra_unlock(zh->lock_shadow);
+       zebra_unlock(zh->lock_normal);
+        yaz_log(log_level, "nothing to commit");
     }
-    bfs_destroy (bfs);
+    bfs_destroy(bfs);
 
-    zebra_unlock (zh->lock_shadow);
-    zebra_unlock (zh->lock_normal);
-    return 0;
+    return res;
 }
 
-int zebra_init (ZebraHandle zh)
+ZEBRA_RES zebra_clean(ZebraHandle zh)
+{
+    yaz_log(log_level, "zebra_clean");
+    ZEBRA_CHECK_HANDLE(zh);
+    return zebra_commit_ex(zh, 1);
+}
+
+ZEBRA_RES zebra_commit(ZebraHandle zh)
+{
+    yaz_log(log_level, "zebra_commit");
+    ZEBRA_CHECK_HANDLE(zh);
+    return zebra_commit_ex(zh, 0);
+}
+
+
+ZEBRA_RES zebra_init(ZebraHandle zh)
 {
     const char *rval;
     BFiles bfs = 0;
 
+    yaz_log(log_level, "zebra_init");
+
+    ZEBRA_CHECK_HANDLE(zh);
+
+    zebra_select_default_database(zh);
     if (!zh->res)
     {
-        zh->errCode = 109;
-        return -1;
+       zebra_setError(zh, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
+                      "cannot select default database");
+       return ZEBRA_FAIL;
     }
     rval = res_get (zh->res, "shadow");
 
-    bfs = bfs_create (res_get (zh->service->global_res, "register"),
-                      zh->path_reg);
+    bfs = bfs_create (res_get (zh->res, "register"), zh->path_reg);
+    if (!bfs)
+    {
+       zebra_setError(zh, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, "bfs_create");
+       return ZEBRA_FAIL;
+    }
     if (rval && *rval)
         bf_cache (bfs, rval);
     
     bf_reset (bfs);
     bfs_destroy (bfs);
     zebra_set_state (zh, 'o', 0);
-    return 0;
+    return ZEBRA_OK;
 }
 
-int zebra_compact (ZebraHandle zh)
+ZEBRA_RES zebra_compact(ZebraHandle zh)
 {
     BFiles bfs;
+
+    yaz_log(log_level, "zebra_compact");
+    ZEBRA_CHECK_HANDLE(zh);
     if (!zh->res)
     {
-        zh->errCode = 109;
-        return -1;
+        zh->errCode = YAZ_BIB1_DATABASE_UNAVAILABLE;
+        return ZEBRA_FAIL;
     }
     bfs = bfs_create (res_get (zh->res, "register"), zh->path_reg);
     inv_compact (bfs);
     bfs_destroy (bfs);
-    return 0;
+    return ZEBRA_OK;
+}
+
+void zebra_result(ZebraHandle zh, int *code, char **addinfo)
+{
+    yaz_log(log_level, "zebra_result");
+    if (zh)
+    {
+       *code = zh->errCode;
+       *addinfo = zh->errString;
+    }
+    else
+    {
+       *code = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+       *addinfo ="ZebraHandle is NULL";
+    }
+}
+
+void zebra_shadow_enable(ZebraHandle zh, int value)
+{
+    ASSERTZH;
+    yaz_log(log_level, "zebra_shadow_enable");
+    zh->shadow_enable = value;
+}
+
+ZEBRA_RES zebra_octet_term_encoding(ZebraHandle zh, const char *encoding)
+{
+    yaz_log(log_level, "zebra_octet_term_encoding %s", encoding);
+    ZEBRA_CHECK_HANDLE(zh);
+    assert(encoding);
+
+    if (zh->iconv_to_utf8 != 0)
+        yaz_iconv_close(zh->iconv_to_utf8);
+    if (zh->iconv_from_utf8 != 0)
+        yaz_iconv_close(zh->iconv_from_utf8);
+    
+    zh->iconv_to_utf8 =
+        yaz_iconv_open ("UTF-8", encoding);
+    if (zh->iconv_to_utf8 == 0)
+        yaz_log (YLOG_WARN, "iconv: %s to UTF-8 unsupported", encoding);
+    zh->iconv_from_utf8 =
+        yaz_iconv_open (encoding, "UTF-8");
+    if (zh->iconv_to_utf8 == 0)
+        yaz_log (YLOG_WARN, "iconv: UTF-8 to %s unsupported", encoding);
+
+    return ZEBRA_OK;
 }
 
-int zebra_record_insert (ZebraHandle zh, const char *buf, int len)
+ZEBRA_RES zebra_record_encoding (ZebraHandle zh, const char *encoding)
 {
-    int sysno = 0;
-    zebra_begin_trans (zh);
-    extract_rec_in_mem (zh, "grs.sgml",
-                        buf, len,
-                        "Default",  /* database */
-                        0 /* delete_flag */,
-                        0 /* test_mode */,
-                        &sysno /* sysno */,
-                        1 /* store_keys */,
-                        1 /* store_data */,
-                        0 /* match criteria */);
-    zebra_end_trans (zh);
-    return sysno;
+    yaz_log(log_level, "zebra_record_encoding");
+    ZEBRA_CHECK_HANDLE(zh);
+    xfree(zh->record_encoding);
+    zh->record_encoding = 0;
+    if (encoding)
+       zh->record_encoding = xstrdup (encoding);
+    return ZEBRA_OK;
 }
 
-void zebra_set_group (ZebraHandle zh, struct recordGroup *rg)
+void zebra_set_resource(ZebraHandle zh, const char *name, const char *value)
 {
-    memcpy (&zh->rGroup, rg, sizeof(*rg));
+    assert(name);
+    assert(value);
+    yaz_log(log_level, "zebra_set_resource %s:%s", name, value);
+    ASSERTZH;
+    res_set(zh->res, name, value);
 }
 
-void zebra_result (ZebraHandle zh, int *code, char **addinfo)
+const char *zebra_get_resource(ZebraHandle zh,
+                               const char *name, const char *defaultvalue)
 {
-    *code = zh->errCode;
-    *addinfo = zh->errString;
+    const char *v;
+    ASSERTZH;
+    assert(name);
+    v = res_get_def (zh->res, name, (char *)defaultvalue);
+    yaz_log(log_level, "zebra_get_resource %s:%s", name, v);
+    return v;
 }
 
-void zebra_shadow_enable (ZebraHandle zh, int value)
+/* moved from zebra_api_ext.c by pop */
+/* FIXME: Should this really be public??? -Heikki */
+
+int zebra_trans_no (ZebraHandle zh)
+{
+    yaz_log(log_level, "zebra_trans_no");
+    ASSERTZH;
+    return zh->trans_no;
+}
+
+int zebra_get_shadow_enable (ZebraHandle zh)
 {
+    yaz_log(log_level, "zebra_get_shadow_enable");
+    ASSERTZH;
+    return zh->shadow_enable;
+}
+
+void zebra_set_shadow_enable (ZebraHandle zh, int value)
+{
+    yaz_log(log_level, "zebra_set_shadow_enable %d",value);
+    ASSERTZH;
     zh->shadow_enable = value;
 }
 
+ZEBRA_RES zebra_add_record(ZebraHandle zh,
+                           const char *buf, int buf_size)
+{
+    return zebra_update_record(zh, 0, 0 /* sysno */, 0, 0, buf, buf_size, 0);
+}
+
+ZEBRA_RES zebra_insert_record(ZebraHandle zh, 
+                             const char *recordType,
+                             SYSNO *sysno, const char *match,
+                             const char *fname,
+                             const char *buf, int buf_size, int force_update)
+{
+    ZEBRA_RES res;
+    ASSERTZH;
+    assert(sysno);
+    assert(buf);
+    yaz_log(log_level, "zebra_insert_record sysno=" ZINT_FORMAT, *sysno);
+
+    if (buf_size < 1)
+       buf_size = strlen(buf);
+
+    if (zebra_begin_trans(zh, 1) == ZEBRA_FAIL)
+       return ZEBRA_FAIL;
+    res = zebra_buffer_extract_record(zh, buf, buf_size, 
+                                      0, /* delete_flag  */
+                                      0, /* test_mode */
+                                      recordType,
+                                      sysno,   
+                                      match, fname,
+                                      0, 
+                                      0); /* allow_update */
+    if (zebra_end_trans(zh) != ZEBRA_OK)
+    {
+       yaz_log(YLOG_WARN, "zebra_end_trans failed");
+       res = ZEBRA_FAIL;
+    }
+    return res; 
+}
+
+ZEBRA_RES zebra_update_record (ZebraHandle zh, 
+                              const char *recordType,
+                              SYSNO* sysno, const char *match,
+                              const char *fname,
+                              const char *buf, int buf_size,
+                              int force_update)
+{
+    ZEBRA_RES res;
+
+    ZEBRA_CHECK_HANDLE(zh);
+
+    assert(buf);
+
+    yaz_log(log_level, "zebra_update_record");
+    if (sysno)
+       yaz_log(log_level, " sysno=" ZINT_FORMAT, *sysno);
+
+    if (buf_size < 1) buf_size = strlen(buf);
+
+    if (zebra_begin_trans(zh, 1) == ZEBRA_FAIL)
+       return ZEBRA_FAIL;
+    res = zebra_buffer_extract_record(zh, buf, buf_size, 
+                                      0, /* delete_flag */
+                                      0, /* test_mode */
+                                      recordType,
+                                      sysno,   
+                                      match, fname,
+                                      force_update, 
+                                      1); /* allow_update */
+    if (zebra_end_trans(zh) != ZEBRA_OK)
+    {
+       yaz_log(YLOG_WARN, "zebra_end_trans failed");
+       res = ZEBRA_FAIL;
+    }
+    return res; 
+}
+
+ZEBRA_RES zebra_delete_record (ZebraHandle zh, 
+                              const char *recordType,
+                              SYSNO *sysno, const char *match,
+                              const char *fname,
+                              const char *buf, int buf_size,
+                              int force_update) 
+{
+    ZEBRA_RES res;
+
+    ZEBRA_CHECK_HANDLE(zh);
+
+    assert(buf);
+    yaz_log(log_level, "zebra_delete_record");
+    if (sysno)
+       yaz_log(log_level, " sysno=" ZINT_FORMAT, *sysno);
+
+    if (buf_size < 1) buf_size = strlen(buf);
+
+    if (zebra_begin_trans(zh, 1) == ZEBRA_FAIL)
+       return ZEBRA_FAIL;
+    res = zebra_buffer_extract_record(zh, buf, buf_size,
+                                      1, /* delete_flag */
+                                      0, /* test_mode */
+                                      recordType,
+                                      sysno,
+                                      match,fname,
+                                      force_update,
+                                      1); /* allow_update */
+    if (zebra_end_trans(zh) != ZEBRA_OK)
+    {
+       yaz_log(YLOG_WARN, "zebra_end_trans failed");
+       res = ZEBRA_FAIL;
+    }
+    return res;
+}
+
+/* ---------------------------------------------------------------------------
+  Searching 
+*/
+
+ZEBRA_RES zebra_search_PQF(ZebraHandle zh, const char *pqf_query,
+                          const char *setname, zint *hits)
+{
+    zint lhits = 0;
+    ZEBRA_RES res = ZEBRA_OK;
+    Z_RPNQuery *query;
+    ODR odr;
+
+    ZEBRA_CHECK_HANDLE(zh);
+
+    odr = odr_createmem(ODR_ENCODE);
+
+    assert(pqf_query);
+    assert(setname);
+
+    yaz_log(log_level, "zebra_search_PQF s=%s q=%s", setname, pqf_query);
+    
+    query = p_query_rpn (odr, PROTO_Z3950, pqf_query);
+    
+    if (!query)
+    {
+        yaz_log (YLOG_WARN, "bad query %s\n", pqf_query);
+       zh->errCode = YAZ_BIB1_MALFORMED_QUERY;
+       res = ZEBRA_FAIL;
+    }
+    else
+        res = zebra_search_RPN(zh, odr, query, setname, &lhits);
+    
+    odr_destroy(odr);
+
+    yaz_log(log_level, "Hits: " ZINT_FORMAT, lhits);
+
+    if (hits)
+       *hits = lhits;
+
+    return res;
+}
+
+/* ---------------------------------------------------------------------------
+  Sort - a simplified interface, with optional read locks.
+*/
+int zebra_sort_by_specstr (ZebraHandle zh, ODR stream,
+                          const char *sort_spec,
+                          const char *output_setname,
+                          const char **input_setnames) 
+{
+    int num_input_setnames = 0;
+    int sort_status = 0;
+    Z_SortKeySpecList *sort_sequence;
+
+    ZEBRA_CHECK_HANDLE(zh);
+    assert(stream);
+    assert(sort_spec);
+    assert(output_setname);
+    assert(input_setnames);
+    sort_sequence = yaz_sort_spec (stream, sort_spec);
+    yaz_log(log_level, "sort (FIXME) ");
+    if (!sort_sequence)
+    {
+        yaz_log(YLOG_WARN, "invalid sort specs '%s'", sort_spec);
+        zh->errCode = YAZ_BIB1_CANNOT_SORT_ACCORDING_TO_SEQUENCE;
+       return -1;
+    }
+    
+    /* we can do this, since the perl typemap code for char** will 
+       put a NULL at the end of list */
+    while (input_setnames[num_input_setnames]) num_input_setnames++;
+
+    if (zebra_begin_read (zh))
+        return -1;
+    
+    resultSetSort (zh, stream->mem, num_input_setnames, input_setnames,
+                   output_setname, sort_sequence, &sort_status);
+    
+    zebra_end_read(zh);
+    return sort_status;
+}
+
+/* ---------------------------------------------------------------------------
+  Get BFS for Zebra system (to make alternative storage methods)
+*/
+struct BFiles_struct *zebra_get_bfs(ZebraHandle zh)
+{
+    if (zh && zh->reg)
+       return zh->reg->bfs;
+    return 0;
+}
+
+
+/* ---------------------------------------------------------------------------
+  Set limit for search/scan
+*/
+ZEBRA_RES zebra_set_limit(ZebraHandle zh, int complement_flag, zint *ids)
+{
+    ZEBRA_CHECK_HANDLE(zh);
+    zebra_limit_destroy(zh->m_limit);
+    zh->m_limit = zebra_limit_create(complement_flag, ids);
+    return ZEBRA_OK;
+}
+
+/*
+  Set Error code + addinfo
+*/
+void zebra_setError(ZebraHandle zh, int code, const char *addinfo)
+{
+    if (!zh)
+       return;
+    zh->errCode = code;
+    nmem_reset(zh->nmem_error);
+    zh->errString = addinfo ? nmem_strdup(zh->nmem_error, addinfo) : 0;
+}
+
+void zebra_setError_zint(ZebraHandle zh, int code, zint i)
+{
+    char vstr[60];
+    sprintf(vstr, ZINT_FORMAT, i);
+
+    zh->errCode = code;
+    nmem_reset(zh->nmem_error);
+    zh->errString = nmem_strdup(zh->nmem_error, vstr);
+}
+
+void zebra_lock_prefix (Res res, char *path)
+{
+    const char *lock_dir = res_get_def (res, "lockDir", "");
+
+    strcpy (path, lock_dir);
+    if (*path && path[strlen(path)-1] != '/')
+        strcat (path, "/");
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+