2 * Copyright (C) 1995-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.44 1996-12-11 12:08:01 adam
8 * Added better compression.
10 * Revision 1.43 1996/11/15 15:03:58 adam
11 * Logging of execution speed by using the times(2) call.
13 * Revision 1.42 1996/11/08 11:10:36 adam
14 * Buffers used during file match got bigger.
15 * Compressed ISAM support everywhere.
16 * Bug fixes regarding masking characters in queries.
17 * Redesigned Regexp-2 queries.
19 * Revision 1.41 1996/10/29 14:09:56 adam
20 * Use of cisam system - enabled if setting isamc is 1.
22 * Revision 1.40 1996/06/04 10:19:02 adam
23 * Minor changes - removed include of ctype.h.
25 * Revision 1.39 1996/05/31 09:07:05 quinn
26 * Work on character-set handling
28 * Revision 1.38 1996/05/14 11:34:01 adam
29 * Scan support in multiple registers/databases.
31 * Revision 1.37 1996/05/14 06:16:48 adam
32 * Compact use/set bytes used in search service.
34 * Revision 1.36 1996/05/01 13:46:37 adam
35 * First work on multiple records in one file.
36 * New option, -offset, to the "unread" command in the filter module.
38 * Revision 1.35 1996/03/26 16:01:14 adam
39 * New setting lockPath: directory of various lock files.
41 * Revision 1.34 1996/03/20 09:36:46 adam
42 * Function dict_lookup_grep got extra parameter, init_pos, which marks
43 * from which position in pattern approximate pattern matching should occur.
44 * Approximate pattern matching is used in relevance=re-2.
46 * Revision 1.33 1996/01/17 14:57:56 adam
47 * Prototype changed for reader functions in extract/retrieve. File
48 * is identified by 'void *' instead of 'int.
50 * Revision 1.32 1995/12/11 09:12:58 adam
51 * The rec_get function returns NULL if record doesn't exist - will
52 * happen in the server if the result set records have been deleted since
53 * the creation of the set (i.e. the search).
54 * The server saves a result temporarily if it is 'volatile', i.e. the
55 * set is register dependent.
57 * Revision 1.31 1995/12/08 16:22:56 adam
58 * Work on update while servers are running. Three lock files introduced.
59 * The servers reload their registers when necessary, but they don't
60 * reestablish result sets yet.
62 * Revision 1.30 1995/12/07 17:38:48 adam
63 * Work locking mechanisms for concurrent updates/commit.
65 * Revision 1.29 1995/12/04 14:22:32 adam
66 * Extra arg to recType_byName.
67 * Started work on new regular expression parsed input to
70 * Revision 1.28 1995/11/28 09:09:48 adam
71 * Zebra config renamed.
72 * Use setting 'recordId' to identify record now.
73 * Bug fix in recindex.c: rec_release_blocks was invokeded even
74 * though the blocks were already released.
75 * File traversal properly deletes records when needed.
77 * Revision 1.27 1995/11/27 13:58:54 adam
78 * New option -t. storeStore data implemented in server.
80 * Revision 1.26 1995/11/25 10:24:07 adam
81 * More record fields - they are enumerated now.
82 * New options: flagStoreData flagStoreKey.
84 * Revision 1.25 1995/11/21 15:29:13 adam
85 * Config file 'base' read by default by both indexer and server.
87 * Revision 1.24 1995/11/20 16:59:47 adam
88 * New update method: the 'old' keys are saved for each records.
90 * Revision 1.23 1995/11/16 17:00:56 adam
91 * Better logging of rpn query.
93 * Revision 1.22 1995/11/16 15:34:55 adam
94 * Uses new record management system in both indexer and server.
96 * Revision 1.21 1995/11/01 16:25:52 quinn
97 * *** empty log message ***
99 * Revision 1.20 1995/10/27 14:00:12 adam
100 * Implemented detection of database availability.
102 * Revision 1.19 1995/10/17 18:02:11 adam
103 * New feature: databases. Implemented as prefix to words in dictionary.
105 * Revision 1.18 1995/10/16 14:03:09 quinn
106 * Changes to support element set names and espec1
108 * Revision 1.17 1995/10/16 09:32:40 adam
109 * More work on relational op.
111 * Revision 1.16 1995/10/13 12:26:44 adam
112 * Optimization of truncation.
114 * Revision 1.15 1995/10/12 12:40:55 adam
115 * Bug fixes in rpn_prox.
117 * Revision 1.14 1995/10/09 16:18:37 adam
118 * Function dict_lookup_grep got extra client data parameter.
120 * Revision 1.13 1995/10/06 14:38:00 adam
121 * New result set method: r_score.
122 * Local no (sysno) and score is transferred to retrieveCtrl.
124 * Revision 1.12 1995/10/06 13:52:06 adam
125 * Bug fixes. Handler may abort further scanning.
127 * Revision 1.11 1995/10/06 10:43:57 adam
128 * Scan added. 'occurrences' in scan entries not set yet.
130 * Revision 1.10 1995/10/02 16:43:32 quinn
131 * Set default resulting record type in fetch.
133 * Revision 1.9 1995/10/02 15:18:52 adam
134 * New member in recRetrieveCtrl: diagnostic.
136 * Revision 1.8 1995/09/28 09:19:47 adam
137 * xfree/xmalloc used everywhere.
138 * Extract/retrieve method seems to work for text records.
140 * Revision 1.7 1995/09/27 16:17:32 adam
141 * More work on retrieve.
143 * Revision 1.6 1995/09/08 08:53:22 adam
144 * Record buffer maintained in server_info.
146 * Revision 1.5 1995/09/06 16:11:18 adam
147 * Option: only one word key per file.
149 * Revision 1.4 1995/09/06 10:33:04 adam
150 * More work on present. Some log messages removed.
152 * Revision 1.3 1995/09/05 15:28:40 adam
153 * More work on search engine.
155 * Revision 1.2 1995/09/04 12:33:43 adam
156 * Various cleanup. YAZ util used instead.
158 * Revision 1.1 1995/09/04 09:10:41 adam
159 * More work on index add/del/update.
160 * Merge sort implemented.
161 * Initial work on z39 server.
179 #include <sys/times.h>
183 ZServerInfo server_info;
186 static struct tms tms1;
187 static struct tms tms2;
190 static int register_lock (ZServerInfo *zi)
193 int state = zebraServerLockGetState(&lastChange);
203 zebraServerLock (state);
207 if (zi->registerState == state)
209 if (zi->registerChange >= lastChange)
211 logf (LOG_LOG, "Register completely updated since last access");
213 else if (zi->registerState == -1)
214 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
217 logf (LOG_LOG, "Register has changed state from %d to %d",
218 zi->registerState, state);
219 zi->registerChange = lastChange;
222 zebTargetInfo_close (zi->zti, 0);
223 dict_close (zi->dict);
227 isc_close (zi->isamc);
228 rec_close (&zi->records);
231 zi->registerState = state;
232 zi->records = rec_open (0);
233 if (!(zi->dict = dict_open (FNAME_DICT, 40, 0)))
237 if (res_get_match (common_resource, "isam", "c", NULL))
239 if (!(zi->isamc = isc_open (FNAME_ISAMC, 0, key_isamc_m())))
245 if (!(zi->isam = is_open (FNAME_ISAM, key_compare, 0,
246 sizeof (struct it_key))))
249 zi->zti = zebTargetInfo_open (zi->records, 0);
254 static void register_unlock (ZServerInfo *zi)
256 static int waitSec = -1;
260 logf (LOG_LOG, "user/system: %ld/%ld",
261 (long) (tms2.tms_utime - tms1.tms_utime),
262 (long) (tms2.tms_stime - tms1.tms_stime));
266 char *s = res_get (common_resource, "debugRequestWait");
274 if (zi->registerState != -1)
275 zebraServerUnlock (zi->registerState);
278 bend_initresult *bend_init (bend_initrequest *q)
280 static bend_initresult r;
281 static char *name = "zserver";
287 logf (LOG_DEBUG, "bend_init");
289 if (!common_resource)
291 struct statserv_options_block *sob;
293 sob = statserv_getcontrol ();
294 logf (LOG_LOG, "Reading resources from %s", sob->configname);
295 if (!(common_resource = res_open (sob->configname)))
297 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
300 bf_lockDir (res_get (common_resource, "lockDir"));
301 data1_set_tabpath (res_get(common_resource, "profilePath"));
303 server_info.sets = NULL;
304 server_info.registerState = -1; /* trigger open of registers! */
305 server_info.registerChange = 0;
307 server_info.records = NULL;
308 server_info.odr = odr_createmem (ODR_ENCODE);
312 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
314 static bend_searchresult r;
320 register_lock (&server_info);
321 odr_reset (server_info.odr);
322 server_info.errCode = 0;
323 server_info.errString = NULL;
325 logf (LOG_LOG, "ResultSet '%s'", q->setname);
326 switch (q->query->which)
328 case Z_Query_type_1: case Z_Query_type_101:
329 r.errcode = rpn_search (&server_info, q->query->u.type_1,
330 q->num_bases, q->basenames, q->setname,
332 r.errstring = server_info.errString;
337 register_unlock (&server_info);
341 static int record_offset;
343 static int record_ext_read (void *fh, char *buf, size_t count)
345 return read (*((int*) fh), buf, count);
348 static off_t record_ext_seek (void *fh, off_t offset)
350 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
353 static int record_int_pos;
354 static char *record_int_buf;
355 static int record_int_len;
357 static off_t record_int_seek (void *fh, off_t offset)
359 return (off_t) (record_int_pos = offset);
362 static int record_int_read (void *fh, char *buf, size_t count)
364 int l = record_int_len - record_int_pos;
367 l = (l < count) ? l : count;
368 memcpy (buf, record_int_buf + record_int_pos, l);
373 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
374 oid_value input_format, Z_RecordComposition *comp,
375 oid_value *output_format, char **rec_bufp,
376 int *rec_lenp, char **basenamep)
379 char *fname, *file_type, *basename;
382 struct recRetrieveCtrl retrieveCtrl;
385 rec = rec_get (zi->records, sysno);
388 char *msg = "Record is deleted\n";
389 *output_format = VAL_SUTRS;
391 *rec_lenp = strlen (msg);
392 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
395 file_type = rec->info[recInfo_fileType];
396 fname = rec->info[recInfo_filename];
397 basename = rec->info[recInfo_databaseName];
398 *basenamep = odr_malloc (stream, strlen(basename)+1);
399 strcpy (*basenamep, basename);
401 if (!(rt = recType_byName (file_type, subType)))
403 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
407 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
408 if (rec->size[recInfo_storeData] > 0)
410 retrieveCtrl.readf = record_int_read;
411 retrieveCtrl.seekf = record_int_seek;
412 record_int_len = rec->size[recInfo_storeData];
413 record_int_buf = rec->info[recInfo_storeData];
415 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
419 if ((fd = open (fname, O_RDONLY)) == -1)
421 char *msg = "Record doesn't exist\n";
422 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
423 *output_format = VAL_SUTRS;
425 *rec_lenp = strlen (msg);
427 return 0; /* or 14: System error in presenting records */
430 memcpy (&record_offset, rec->info[recInfo_offset],
431 sizeof(record_offset));
433 retrieveCtrl.fh = &fd;
434 retrieveCtrl.readf = record_ext_read;
435 retrieveCtrl.seekf = record_ext_seek;
437 record_ext_seek (retrieveCtrl.fh, 0);
439 retrieveCtrl.subType = subType;
440 retrieveCtrl.localno = sysno;
441 retrieveCtrl.score = score;
442 retrieveCtrl.odr = stream;
443 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
444 retrieveCtrl.comp = comp;
445 retrieveCtrl.diagnostic = 0;
446 (*rt->retrieve)(&retrieveCtrl);
447 *output_format = retrieveCtrl.output_format;
448 *rec_bufp = retrieveCtrl.rec_buf;
449 *rec_lenp = retrieveCtrl.rec_len;
454 return retrieveCtrl.diagnostic;
457 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
459 static bend_fetchresult r;
461 ZServerSetSysno *records;
463 register_lock (&server_info);
469 odr_reset (server_info.odr);
470 server_info.errCode = 0;
472 positions[0] = q->number;
473 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
476 logf (LOG_DEBUG, "resultSetRecordGet, error");
478 register_unlock (&server_info);
481 if (!records[0].sysno)
484 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
485 register_unlock (&server_info);
488 r.errcode = record_fetch (&server_info, records[0].sysno,
489 records[0].score, q->stream, q->format,
490 q->comp, &r.format, &r.record, &r.len,
492 resultSetSysnoDel (&server_info, records, 1);
493 register_unlock (&server_info);
497 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
499 register_lock (&server_info);
500 register_unlock (&server_info);
504 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
506 static bend_scanresult r;
509 register_lock (&server_info);
510 odr_reset (server_info.odr);
511 server_info.errCode = 0;
512 server_info.errString = 0;
514 r.term_position = q->term_position;
515 r.num_entries = q->num_entries;
516 r.errcode = rpn_scan (&server_info, q->term,
518 q->num_bases, q->basenames,
520 &r.num_entries, &r.entries, &status);
521 r.errstring = server_info.errString;
523 register_unlock (&server_info);
527 void bend_close (void *handle)
529 if (server_info.records)
531 dict_close (server_info.dict);
532 if (server_info.isam)
533 is_close (server_info.isam);
534 if (server_info.isamc)
535 isc_close (server_info.isamc);
536 rec_close (&server_info.records);
537 register_unlock (&server_info);
542 int main (int argc, char **argv)
544 struct statserv_options_block *sob;
546 sob = statserv_getcontrol ();
547 strcpy (sob->configname, FNAME_CONFIG);
548 statserv_setcontrol (sob);
550 return statserv_main (argc, argv);