2 * Copyright (C) 1995-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.42 1996-11-08 11:10:36 adam
8 * Buffers used during file match got bigger.
9 * Compressed ISAM support everywhere.
10 * Bug fixes regarding masking characters in queries.
11 * Redesigned Regexp-2 queries.
13 * Revision 1.41 1996/10/29 14:09:56 adam
14 * Use of cisam system - enabled if setting isamc is 1.
16 * Revision 1.40 1996/06/04 10:19:02 adam
17 * Minor changes - removed include of ctype.h.
19 * Revision 1.39 1996/05/31 09:07:05 quinn
20 * Work on character-set handling
22 * Revision 1.38 1996/05/14 11:34:01 adam
23 * Scan support in multiple registers/databases.
25 * Revision 1.37 1996/05/14 06:16:48 adam
26 * Compact use/set bytes used in search service.
28 * Revision 1.36 1996/05/01 13:46:37 adam
29 * First work on multiple records in one file.
30 * New option, -offset, to the "unread" command in the filter module.
32 * Revision 1.35 1996/03/26 16:01:14 adam
33 * New setting lockPath: directory of various lock files.
35 * Revision 1.34 1996/03/20 09:36:46 adam
36 * Function dict_lookup_grep got extra parameter, init_pos, which marks
37 * from which position in pattern approximate pattern matching should occur.
38 * Approximate pattern matching is used in relevance=re-2.
40 * Revision 1.33 1996/01/17 14:57:56 adam
41 * Prototype changed for reader functions in extract/retrieve. File
42 * is identified by 'void *' instead of 'int.
44 * Revision 1.32 1995/12/11 09:12:58 adam
45 * The rec_get function returns NULL if record doesn't exist - will
46 * happen in the server if the result set records have been deleted since
47 * the creation of the set (i.e. the search).
48 * The server saves a result temporarily if it is 'volatile', i.e. the
49 * set is register dependent.
51 * Revision 1.31 1995/12/08 16:22:56 adam
52 * Work on update while servers are running. Three lock files introduced.
53 * The servers reload their registers when necessary, but they don't
54 * reestablish result sets yet.
56 * Revision 1.30 1995/12/07 17:38:48 adam
57 * Work locking mechanisms for concurrent updates/commit.
59 * Revision 1.29 1995/12/04 14:22:32 adam
60 * Extra arg to recType_byName.
61 * Started work on new regular expression parsed input to
64 * Revision 1.28 1995/11/28 09:09:48 adam
65 * Zebra config renamed.
66 * Use setting 'recordId' to identify record now.
67 * Bug fix in recindex.c: rec_release_blocks was invokeded even
68 * though the blocks were already released.
69 * File traversal properly deletes records when needed.
71 * Revision 1.27 1995/11/27 13:58:54 adam
72 * New option -t. storeStore data implemented in server.
74 * Revision 1.26 1995/11/25 10:24:07 adam
75 * More record fields - they are enumerated now.
76 * New options: flagStoreData flagStoreKey.
78 * Revision 1.25 1995/11/21 15:29:13 adam
79 * Config file 'base' read by default by both indexer and server.
81 * Revision 1.24 1995/11/20 16:59:47 adam
82 * New update method: the 'old' keys are saved for each records.
84 * Revision 1.23 1995/11/16 17:00:56 adam
85 * Better logging of rpn query.
87 * Revision 1.22 1995/11/16 15:34:55 adam
88 * Uses new record management system in both indexer and server.
90 * Revision 1.21 1995/11/01 16:25:52 quinn
91 * *** empty log message ***
93 * Revision 1.20 1995/10/27 14:00:12 adam
94 * Implemented detection of database availability.
96 * Revision 1.19 1995/10/17 18:02:11 adam
97 * New feature: databases. Implemented as prefix to words in dictionary.
99 * Revision 1.18 1995/10/16 14:03:09 quinn
100 * Changes to support element set names and espec1
102 * Revision 1.17 1995/10/16 09:32:40 adam
103 * More work on relational op.
105 * Revision 1.16 1995/10/13 12:26:44 adam
106 * Optimization of truncation.
108 * Revision 1.15 1995/10/12 12:40:55 adam
109 * Bug fixes in rpn_prox.
111 * Revision 1.14 1995/10/09 16:18:37 adam
112 * Function dict_lookup_grep got extra client data parameter.
114 * Revision 1.13 1995/10/06 14:38:00 adam
115 * New result set method: r_score.
116 * Local no (sysno) and score is transferred to retrieveCtrl.
118 * Revision 1.12 1995/10/06 13:52:06 adam
119 * Bug fixes. Handler may abort further scanning.
121 * Revision 1.11 1995/10/06 10:43:57 adam
122 * Scan added. 'occurrences' in scan entries not set yet.
124 * Revision 1.10 1995/10/02 16:43:32 quinn
125 * Set default resulting record type in fetch.
127 * Revision 1.9 1995/10/02 15:18:52 adam
128 * New member in recRetrieveCtrl: diagnostic.
130 * Revision 1.8 1995/09/28 09:19:47 adam
131 * xfree/xmalloc used everywhere.
132 * Extract/retrieve method seems to work for text records.
134 * Revision 1.7 1995/09/27 16:17:32 adam
135 * More work on retrieve.
137 * Revision 1.6 1995/09/08 08:53:22 adam
138 * Record buffer maintained in server_info.
140 * Revision 1.5 1995/09/06 16:11:18 adam
141 * Option: only one word key per file.
143 * Revision 1.4 1995/09/06 10:33:04 adam
144 * More work on present. Some log messages removed.
146 * Revision 1.3 1995/09/05 15:28:40 adam
147 * More work on search engine.
149 * Revision 1.2 1995/09/04 12:33:43 adam
150 * Various cleanup. YAZ util used instead.
152 * Revision 1.1 1995/09/04 09:10:41 adam
153 * More work on index add/del/update.
154 * Merge sort implemented.
155 * Initial work on z39 server.
169 ZServerInfo server_info;
171 static int register_lock (ZServerInfo *zi)
174 int state = zebraServerLockGetState(&lastChange);
184 zebraServerLock (state);
185 if (zi->registerState == state)
187 if (zi->registerChange >= lastChange)
189 logf (LOG_LOG, "Register completely updated since last access");
191 else if (zi->registerState == -1)
192 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
195 logf (LOG_LOG, "Register has changed state from %d to %d",
196 zi->registerState, state);
197 zi->registerChange = lastChange;
200 zebTargetInfo_close (zi->zti, 0);
201 dict_close (zi->dict);
205 isc_close (zi->isamc);
206 rec_close (&zi->records);
209 zi->registerState = state;
210 zi->records = rec_open (0);
211 if (!(zi->dict = dict_open (FNAME_DICT, 40, 0)))
215 if (res_get_match (common_resource, "isam", "c", NULL))
217 if (!(zi->isamc = isc_open (FNAME_ISAMC, 0, key_isamc_m())))
223 if (!(zi->isam = is_open (FNAME_ISAM, key_compare, 0,
224 sizeof (struct it_key))))
227 zi->zti = zebTargetInfo_open (zi->records, 0);
232 static void register_unlock (ZServerInfo *zi)
234 static int waitSec = -1;
238 char *s = res_get (common_resource, "debugRequestWait");
246 if (zi->registerState != -1)
247 zebraServerUnlock (zi->registerState);
250 bend_initresult *bend_init (bend_initrequest *q)
252 static bend_initresult r;
253 static char *name = "zserver";
259 logf (LOG_DEBUG, "bend_init");
261 if (!common_resource)
263 struct statserv_options_block *sob;
265 sob = statserv_getcontrol ();
266 logf (LOG_LOG, "Reading resources from %s", sob->configname);
267 if (!(common_resource = res_open (sob->configname)))
269 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
272 bf_lockDir (res_get (common_resource, "lockDir"));
273 data1_set_tabpath (res_get(common_resource, "profilePath"));
275 server_info.sets = NULL;
276 server_info.registerState = -1; /* trigger open of registers! */
277 server_info.registerChange = 0;
279 server_info.records = NULL;
280 server_info.odr = odr_createmem (ODR_ENCODE);
284 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
286 static bend_searchresult r;
292 register_lock (&server_info);
293 odr_reset (server_info.odr);
294 server_info.errCode = 0;
295 server_info.errString = NULL;
297 logf (LOG_LOG, "ResultSet '%s'", q->setname);
298 switch (q->query->which)
300 case Z_Query_type_1: case Z_Query_type_101:
301 r.errcode = rpn_search (&server_info, q->query->u.type_1,
302 q->num_bases, q->basenames, q->setname,
304 r.errstring = server_info.errString;
309 register_unlock (&server_info);
313 static int record_offset;
315 static int record_ext_read (void *fh, char *buf, size_t count)
317 return read (*((int*) fh), buf, count);
320 static off_t record_ext_seek (void *fh, off_t offset)
322 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
325 static int record_int_pos;
326 static char *record_int_buf;
327 static int record_int_len;
329 static off_t record_int_seek (void *fh, off_t offset)
331 return (off_t) (record_int_pos = offset);
334 static int record_int_read (void *fh, char *buf, size_t count)
336 int l = record_int_len - record_int_pos;
339 l = (l < count) ? l : count;
340 memcpy (buf, record_int_buf + record_int_pos, l);
345 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
346 oid_value input_format, Z_RecordComposition *comp,
347 oid_value *output_format, char **rec_bufp,
348 int *rec_lenp, char **basenamep)
351 char *fname, *file_type, *basename;
354 struct recRetrieveCtrl retrieveCtrl;
357 rec = rec_get (zi->records, sysno);
360 char *msg = "Record is deleted\n";
361 *output_format = VAL_SUTRS;
363 *rec_lenp = strlen (msg);
364 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
367 file_type = rec->info[recInfo_fileType];
368 fname = rec->info[recInfo_filename];
369 basename = rec->info[recInfo_databaseName];
370 *basenamep = odr_malloc (stream, strlen(basename)+1);
371 strcpy (*basenamep, basename);
373 if (!(rt = recType_byName (file_type, subType)))
375 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
379 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
380 if (rec->size[recInfo_storeData] > 0)
382 retrieveCtrl.readf = record_int_read;
383 retrieveCtrl.seekf = record_int_seek;
384 record_int_len = rec->size[recInfo_storeData];
385 record_int_buf = rec->info[recInfo_storeData];
387 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
391 if ((fd = open (fname, O_RDONLY)) == -1)
393 char *msg = "Record doesn't exist\n";
394 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
395 *output_format = VAL_SUTRS;
397 *rec_lenp = strlen (msg);
399 return 0; /* or 14: System error in presenting records */
402 memcpy (&record_offset, rec->info[recInfo_offset],
403 sizeof(record_offset));
405 retrieveCtrl.fh = &fd;
406 retrieveCtrl.readf = record_ext_read;
407 retrieveCtrl.seekf = record_ext_seek;
409 record_ext_seek (retrieveCtrl.fh, 0);
411 retrieveCtrl.subType = subType;
412 retrieveCtrl.localno = sysno;
413 retrieveCtrl.score = score;
414 retrieveCtrl.odr = stream;
415 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
416 retrieveCtrl.comp = comp;
417 retrieveCtrl.diagnostic = 0;
418 (*rt->retrieve)(&retrieveCtrl);
419 *output_format = retrieveCtrl.output_format;
420 *rec_bufp = retrieveCtrl.rec_buf;
421 *rec_lenp = retrieveCtrl.rec_len;
426 return retrieveCtrl.diagnostic;
429 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
431 static bend_fetchresult r;
433 ZServerSetSysno *records;
435 register_lock (&server_info);
441 odr_reset (server_info.odr);
442 server_info.errCode = 0;
444 positions[0] = q->number;
445 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
448 logf (LOG_DEBUG, "resultSetRecordGet, error");
450 register_unlock (&server_info);
453 if (!records[0].sysno)
456 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
457 register_unlock (&server_info);
460 r.errcode = record_fetch (&server_info, records[0].sysno,
461 records[0].score, q->stream, q->format,
462 q->comp, &r.format, &r.record, &r.len,
464 resultSetSysnoDel (&server_info, records, 1);
465 register_unlock (&server_info);
469 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
471 register_lock (&server_info);
472 register_unlock (&server_info);
476 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
478 static bend_scanresult r;
481 register_lock (&server_info);
482 odr_reset (server_info.odr);
483 server_info.errCode = 0;
484 server_info.errString = 0;
486 r.term_position = q->term_position;
487 r.num_entries = q->num_entries;
488 r.errcode = rpn_scan (&server_info, q->term,
490 q->num_bases, q->basenames,
492 &r.num_entries, &r.entries, &status);
493 r.errstring = server_info.errString;
495 register_unlock (&server_info);
499 void bend_close (void *handle)
501 if (server_info.records)
503 dict_close (server_info.dict);
504 if (server_info.isam)
505 is_close (server_info.isam);
506 if (server_info.isamc)
507 isc_close (server_info.isamc);
508 rec_close (&server_info.records);
509 register_unlock (&server_info);
514 int main (int argc, char **argv)
516 struct statserv_options_block *sob;
518 sob = statserv_getcontrol ();
519 strcpy (sob->configname, FNAME_CONFIG);
520 statserv_setcontrol (sob);
522 return statserv_main (argc, argv);