2 * Copyright (C) 1995-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.41 1996-10-29 14:09:56 adam
8 * Use of cisam system - enabled if setting isamc is 1.
10 * Revision 1.40 1996/06/04 10:19:02 adam
11 * Minor changes - removed include of ctype.h.
13 * Revision 1.39 1996/05/31 09:07:05 quinn
14 * Work on character-set handling
16 * Revision 1.38 1996/05/14 11:34:01 adam
17 * Scan support in multiple registers/databases.
19 * Revision 1.37 1996/05/14 06:16:48 adam
20 * Compact use/set bytes used in search service.
22 * Revision 1.36 1996/05/01 13:46:37 adam
23 * First work on multiple records in one file.
24 * New option, -offset, to the "unread" command in the filter module.
26 * Revision 1.35 1996/03/26 16:01:14 adam
27 * New setting lockPath: directory of various lock files.
29 * Revision 1.34 1996/03/20 09:36:46 adam
30 * Function dict_lookup_grep got extra parameter, init_pos, which marks
31 * from which position in pattern approximate pattern matching should occur.
32 * Approximate pattern matching is used in relevance=re-2.
34 * Revision 1.33 1996/01/17 14:57:56 adam
35 * Prototype changed for reader functions in extract/retrieve. File
36 * is identified by 'void *' instead of 'int.
38 * Revision 1.32 1995/12/11 09:12:58 adam
39 * The rec_get function returns NULL if record doesn't exist - will
40 * happen in the server if the result set records have been deleted since
41 * the creation of the set (i.e. the search).
42 * The server saves a result temporarily if it is 'volatile', i.e. the
43 * set is register dependent.
45 * Revision 1.31 1995/12/08 16:22:56 adam
46 * Work on update while servers are running. Three lock files introduced.
47 * The servers reload their registers when necessary, but they don't
48 * reestablish result sets yet.
50 * Revision 1.30 1995/12/07 17:38:48 adam
51 * Work locking mechanisms for concurrent updates/commit.
53 * Revision 1.29 1995/12/04 14:22:32 adam
54 * Extra arg to recType_byName.
55 * Started work on new regular expression parsed input to
58 * Revision 1.28 1995/11/28 09:09:48 adam
59 * Zebra config renamed.
60 * Use setting 'recordId' to identify record now.
61 * Bug fix in recindex.c: rec_release_blocks was invokeded even
62 * though the blocks were already released.
63 * File traversal properly deletes records when needed.
65 * Revision 1.27 1995/11/27 13:58:54 adam
66 * New option -t. storeStore data implemented in server.
68 * Revision 1.26 1995/11/25 10:24:07 adam
69 * More record fields - they are enumerated now.
70 * New options: flagStoreData flagStoreKey.
72 * Revision 1.25 1995/11/21 15:29:13 adam
73 * Config file 'base' read by default by both indexer and server.
75 * Revision 1.24 1995/11/20 16:59:47 adam
76 * New update method: the 'old' keys are saved for each records.
78 * Revision 1.23 1995/11/16 17:00:56 adam
79 * Better logging of rpn query.
81 * Revision 1.22 1995/11/16 15:34:55 adam
82 * Uses new record management system in both indexer and server.
84 * Revision 1.21 1995/11/01 16:25:52 quinn
85 * *** empty log message ***
87 * Revision 1.20 1995/10/27 14:00:12 adam
88 * Implemented detection of database availability.
90 * Revision 1.19 1995/10/17 18:02:11 adam
91 * New feature: databases. Implemented as prefix to words in dictionary.
93 * Revision 1.18 1995/10/16 14:03:09 quinn
94 * Changes to support element set names and espec1
96 * Revision 1.17 1995/10/16 09:32:40 adam
97 * More work on relational op.
99 * Revision 1.16 1995/10/13 12:26:44 adam
100 * Optimization of truncation.
102 * Revision 1.15 1995/10/12 12:40:55 adam
103 * Bug fixes in rpn_prox.
105 * Revision 1.14 1995/10/09 16:18:37 adam
106 * Function dict_lookup_grep got extra client data parameter.
108 * Revision 1.13 1995/10/06 14:38:00 adam
109 * New result set method: r_score.
110 * Local no (sysno) and score is transferred to retrieveCtrl.
112 * Revision 1.12 1995/10/06 13:52:06 adam
113 * Bug fixes. Handler may abort further scanning.
115 * Revision 1.11 1995/10/06 10:43:57 adam
116 * Scan added. 'occurrences' in scan entries not set yet.
118 * Revision 1.10 1995/10/02 16:43:32 quinn
119 * Set default resulting record type in fetch.
121 * Revision 1.9 1995/10/02 15:18:52 adam
122 * New member in recRetrieveCtrl: diagnostic.
124 * Revision 1.8 1995/09/28 09:19:47 adam
125 * xfree/xmalloc used everywhere.
126 * Extract/retrieve method seems to work for text records.
128 * Revision 1.7 1995/09/27 16:17:32 adam
129 * More work on retrieve.
131 * Revision 1.6 1995/09/08 08:53:22 adam
132 * Record buffer maintained in server_info.
134 * Revision 1.5 1995/09/06 16:11:18 adam
135 * Option: only one word key per file.
137 * Revision 1.4 1995/09/06 10:33:04 adam
138 * More work on present. Some log messages removed.
140 * Revision 1.3 1995/09/05 15:28:40 adam
141 * More work on search engine.
143 * Revision 1.2 1995/09/04 12:33:43 adam
144 * Various cleanup. YAZ util used instead.
146 * Revision 1.1 1995/09/04 09:10:41 adam
147 * More work on index add/del/update.
148 * Merge sort implemented.
149 * Initial work on z39 server.
163 ZServerInfo server_info;
165 static int register_lock (ZServerInfo *zi)
168 int state = zebraServerLockGetState(&lastChange);
178 zebraServerLock (state);
179 if (zi->registerState == state)
181 if (zi->registerChange >= lastChange)
183 logf (LOG_LOG, "Register completely updated since last access");
185 else if (zi->registerState == -1)
186 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
189 logf (LOG_LOG, "Register has changed state from %d to %d",
190 zi->registerState, state);
191 zi->registerChange = lastChange;
194 zebTargetInfo_close (zi->zti, 0);
195 dict_close (zi->dict);
199 isc_close (zi->isamc);
200 rec_close (&zi->records);
203 zi->registerState = state;
204 zi->records = rec_open (0);
205 if (!(zi->dict = dict_open (FNAME_DICT, 40, 0)))
209 if (res_get_match (common_resource, "isam", "c", NULL))
211 if (!(zi->isamc = isc_open (FNAME_ISAMC, 0, key_isamc_m())))
217 if (!(zi->isam = is_open (FNAME_ISAM, key_compare, 0,
218 sizeof (struct it_key))))
221 zi->zti = zebTargetInfo_open (zi->records, 0);
226 static void register_unlock (ZServerInfo *zi)
228 static int waitSec = -1;
232 char *s = res_get (common_resource, "debugRequestWait");
240 if (zi->registerState != -1)
241 zebraServerUnlock (zi->registerState);
244 bend_initresult *bend_init (bend_initrequest *q)
246 static bend_initresult r;
247 static char *name = "zserver";
253 logf (LOG_DEBUG, "bend_init");
255 if (!common_resource)
257 struct statserv_options_block *sob;
259 sob = statserv_getcontrol ();
260 logf (LOG_LOG, "Reading resources from %s", sob->configname);
261 if (!(common_resource = res_open (sob->configname)))
263 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
266 bf_lockDir (res_get (common_resource, "lockDir"));
267 data1_set_tabpath (res_get(common_resource, "profilePath"));
269 server_info.sets = NULL;
270 server_info.registerState = -1; /* trigger open of registers! */
271 server_info.registerChange = 0;
273 server_info.records = NULL;
274 server_info.odr = odr_createmem (ODR_ENCODE);
278 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
280 static bend_searchresult r;
286 register_lock (&server_info);
287 odr_reset (server_info.odr);
288 server_info.errCode = 0;
289 server_info.errString = NULL;
291 logf (LOG_LOG, "ResultSet '%s'", q->setname);
292 switch (q->query->which)
294 case Z_Query_type_1: case Z_Query_type_101:
295 r.errcode = rpn_search (&server_info, q->query->u.type_1,
296 q->num_bases, q->basenames, q->setname,
298 r.errstring = server_info.errString;
303 register_unlock (&server_info);
307 static int record_offset;
309 static int record_ext_read (void *fh, char *buf, size_t count)
311 return read (*((int*) fh), buf, count);
314 static off_t record_ext_seek (void *fh, off_t offset)
316 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
319 static int record_int_pos;
320 static char *record_int_buf;
321 static int record_int_len;
323 static off_t record_int_seek (void *fh, off_t offset)
325 return (off_t) (record_int_pos = offset);
328 static int record_int_read (void *fh, char *buf, size_t count)
330 int l = record_int_len - record_int_pos;
333 l = (l < count) ? l : count;
334 memcpy (buf, record_int_buf + record_int_pos, l);
339 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
340 oid_value input_format, Z_RecordComposition *comp,
341 oid_value *output_format, char **rec_bufp,
345 char *fname, *file_type;
348 struct recRetrieveCtrl retrieveCtrl;
351 rec = rec_get (zi->records, sysno);
354 char *msg = "Record is deleted\n";
355 *output_format = VAL_SUTRS;
357 *rec_lenp = strlen (msg);
358 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
361 file_type = rec->info[recInfo_fileType];
362 fname = rec->info[recInfo_filename];
364 if (!(rt = recType_byName (file_type, subType)))
366 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
370 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
371 if (rec->size[recInfo_storeData] > 0)
373 retrieveCtrl.readf = record_int_read;
374 retrieveCtrl.seekf = record_int_seek;
375 record_int_len = rec->size[recInfo_storeData];
376 record_int_buf = rec->info[recInfo_storeData];
378 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
382 if ((fd = open (fname, O_RDONLY)) == -1)
384 char *msg = "Record doesn't exist\n";
385 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
386 *output_format = VAL_SUTRS;
388 *rec_lenp = strlen (msg);
390 return 0; /* or 14: System error in presenting records */
393 memcpy (&record_offset, rec->info[recInfo_offset],
394 sizeof(record_offset));
396 retrieveCtrl.fh = &fd;
397 retrieveCtrl.readf = record_ext_read;
398 retrieveCtrl.seekf = record_ext_seek;
400 record_ext_seek (retrieveCtrl.fh, 0);
402 retrieveCtrl.subType = subType;
403 retrieveCtrl.localno = sysno;
404 retrieveCtrl.score = score;
405 retrieveCtrl.odr = stream;
406 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
407 retrieveCtrl.comp = comp;
408 retrieveCtrl.diagnostic = 0;
409 (*rt->retrieve)(&retrieveCtrl);
410 *output_format = retrieveCtrl.output_format;
411 *rec_bufp = retrieveCtrl.rec_buf;
412 *rec_lenp = retrieveCtrl.rec_len;
417 return retrieveCtrl.diagnostic;
420 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
422 static bend_fetchresult r;
424 ZServerSetSysno *records;
426 register_lock (&server_info);
432 odr_reset (server_info.odr);
433 server_info.errCode = 0;
435 positions[0] = q->number;
436 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
439 logf (LOG_DEBUG, "resultSetRecordGet, error");
441 register_unlock (&server_info);
444 if (!records[0].sysno)
447 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
448 register_unlock (&server_info);
451 r.errcode = record_fetch (&server_info, records[0].sysno,
452 records[0].score, q->stream, q->format,
453 q->comp, &r.format, &r.record, &r.len);
454 resultSetSysnoDel (&server_info, records, 1);
455 register_unlock (&server_info);
459 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
461 register_lock (&server_info);
462 register_unlock (&server_info);
466 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
468 static bend_scanresult r;
471 register_lock (&server_info);
472 odr_reset (server_info.odr);
473 server_info.errCode = 0;
474 server_info.errString = 0;
476 r.term_position = q->term_position;
477 r.num_entries = q->num_entries;
478 r.errcode = rpn_scan (&server_info, q->term,
480 q->num_bases, q->basenames,
482 &r.num_entries, &r.entries, &status);
483 r.errstring = server_info.errString;
485 register_unlock (&server_info);
489 void bend_close (void *handle)
491 if (server_info.records)
493 dict_close (server_info.dict);
494 if (server_info.isam)
495 is_close (server_info.isam);
496 if (server_info.isamc)
497 isc_close (server_info.isamc);
498 rec_close (&server_info.records);
499 register_unlock (&server_info);
504 int main (int argc, char **argv)
506 struct statserv_options_block *sob;
508 sob = statserv_getcontrol ();
509 strcpy (sob->configname, FNAME_CONFIG);
510 statserv_setcontrol (sob);
512 return statserv_main (argc, argv);