2 * Copyright (C) 1995-1997, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.48 1997-09-17 12:19:19 adam
8 * Zebra version corresponds to YAZ version 1.4.
9 * Changed Zebra server so that it doesn't depend on global common_resource.
11 * Revision 1.47 1997/09/04 13:58:36 adam
12 * New retrieve/extract method tellf (added).
13 * Added O_BINARY for open calls.
15 * Revision 1.46 1997/07/28 08:30:47 adam
16 * Server returns diagnostic 14 when record doesn't exist.
18 * Revision 1.45 1996/12/23 15:30:45 adam
20 * Bug fix: result sets weren't deleted after server shut down.
22 * Revision 1.44 1996/12/11 12:08:01 adam
23 * Added better compression.
25 * Revision 1.43 1996/11/15 15:03:58 adam
26 * Logging of execution speed by using the times(2) call.
28 * Revision 1.42 1996/11/08 11:10:36 adam
29 * Buffers used during file match got bigger.
30 * Compressed ISAM support everywhere.
31 * Bug fixes regarding masking characters in queries.
32 * Redesigned Regexp-2 queries.
34 * Revision 1.41 1996/10/29 14:09:56 adam
35 * Use of cisam system - enabled if setting isamc is 1.
37 * Revision 1.40 1996/06/04 10:19:02 adam
38 * Minor changes - removed include of ctype.h.
40 * Revision 1.39 1996/05/31 09:07:05 quinn
41 * Work on character-set handling
43 * Revision 1.38 1996/05/14 11:34:01 adam
44 * Scan support in multiple registers/databases.
46 * Revision 1.37 1996/05/14 06:16:48 adam
47 * Compact use/set bytes used in search service.
49 * Revision 1.36 1996/05/01 13:46:37 adam
50 * First work on multiple records in one file.
51 * New option, -offset, to the "unread" command in the filter module.
53 * Revision 1.35 1996/03/26 16:01:14 adam
54 * New setting lockPath: directory of various lock files.
56 * Revision 1.34 1996/03/20 09:36:46 adam
57 * Function dict_lookup_grep got extra parameter, init_pos, which marks
58 * from which position in pattern approximate pattern matching should occur.
59 * Approximate pattern matching is used in relevance=re-2.
61 * Revision 1.33 1996/01/17 14:57:56 adam
62 * Prototype changed for reader functions in extract/retrieve. File
63 * is identified by 'void *' instead of 'int.
65 * Revision 1.32 1995/12/11 09:12:58 adam
66 * The rec_get function returns NULL if record doesn't exist - will
67 * happen in the server if the result set records have been deleted since
68 * the creation of the set (i.e. the search).
69 * The server saves a result temporarily if it is 'volatile', i.e. the
70 * set is register dependent.
72 * Revision 1.31 1995/12/08 16:22:56 adam
73 * Work on update while servers are running. Three lock files introduced.
74 * The servers reload their registers when necessary, but they don't
75 * reestablish result sets yet.
77 * Revision 1.30 1995/12/07 17:38:48 adam
78 * Work locking mechanisms for concurrent updates/commit.
80 * Revision 1.29 1995/12/04 14:22:32 adam
81 * Extra arg to recType_byName.
82 * Started work on new regular expression parsed input to
85 * Revision 1.28 1995/11/28 09:09:48 adam
86 * Zebra config renamed.
87 * Use setting 'recordId' to identify record now.
88 * Bug fix in recindex.c: rec_release_blocks was invokeded even
89 * though the blocks were already released.
90 * File traversal properly deletes records when needed.
92 * Revision 1.27 1995/11/27 13:58:54 adam
93 * New option -t. storeStore data implemented in server.
95 * Revision 1.26 1995/11/25 10:24:07 adam
96 * More record fields - they are enumerated now.
97 * New options: flagStoreData flagStoreKey.
99 * Revision 1.25 1995/11/21 15:29:13 adam
100 * Config file 'base' read by default by both indexer and server.
102 * Revision 1.24 1995/11/20 16:59:47 adam
103 * New update method: the 'old' keys are saved for each records.
105 * Revision 1.23 1995/11/16 17:00:56 adam
106 * Better logging of rpn query.
108 * Revision 1.22 1995/11/16 15:34:55 adam
109 * Uses new record management system in both indexer and server.
111 * Revision 1.21 1995/11/01 16:25:52 quinn
112 * *** empty log message ***
114 * Revision 1.20 1995/10/27 14:00:12 adam
115 * Implemented detection of database availability.
117 * Revision 1.19 1995/10/17 18:02:11 adam
118 * New feature: databases. Implemented as prefix to words in dictionary.
120 * Revision 1.18 1995/10/16 14:03:09 quinn
121 * Changes to support element set names and espec1
123 * Revision 1.17 1995/10/16 09:32:40 adam
124 * More work on relational op.
126 * Revision 1.16 1995/10/13 12:26:44 adam
127 * Optimization of truncation.
129 * Revision 1.15 1995/10/12 12:40:55 adam
130 * Bug fixes in rpn_prox.
132 * Revision 1.14 1995/10/09 16:18:37 adam
133 * Function dict_lookup_grep got extra client data parameter.
135 * Revision 1.13 1995/10/06 14:38:00 adam
136 * New result set method: r_score.
137 * Local no (sysno) and score is transferred to retrieveCtrl.
139 * Revision 1.12 1995/10/06 13:52:06 adam
140 * Bug fixes. Handler may abort further scanning.
142 * Revision 1.11 1995/10/06 10:43:57 adam
143 * Scan added. 'occurrences' in scan entries not set yet.
145 * Revision 1.10 1995/10/02 16:43:32 quinn
146 * Set default resulting record type in fetch.
148 * Revision 1.9 1995/10/02 15:18:52 adam
149 * New member in recRetrieveCtrl: diagnostic.
151 * Revision 1.8 1995/09/28 09:19:47 adam
152 * xfree/xmalloc used everywhere.
153 * Extract/retrieve method seems to work for text records.
155 * Revision 1.7 1995/09/27 16:17:32 adam
156 * More work on retrieve.
158 * Revision 1.6 1995/09/08 08:53:22 adam
159 * Record buffer maintained in server_info.
161 * Revision 1.5 1995/09/06 16:11:18 adam
162 * Option: only one word key per file.
164 * Revision 1.4 1995/09/06 10:33:04 adam
165 * More work on present. Some log messages removed.
167 * Revision 1.3 1995/09/05 15:28:40 adam
168 * More work on search engine.
170 * Revision 1.2 1995/09/04 12:33:43 adam
171 * Various cleanup. YAZ util used instead.
173 * Revision 1.1 1995/09/04 09:10:41 adam
174 * More work on index add/del/update.
175 * Merge sort implemented.
176 * Initial work on z39 server.
194 #include <sys/times.h>
200 static struct tms tms1;
201 static struct tms tms2;
204 static int register_lock (ZServerInfo *zi)
207 int state = zebraServerLockGetState(zi->res, &lastChange);
217 zebraServerLock (zi->res, state);
221 if (zi->registerState == state)
223 if (zi->registerChange >= lastChange)
225 logf (LOG_LOG, "Register completely updated since last access");
227 else if (zi->registerState == -1)
228 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
231 logf (LOG_LOG, "Register has changed state from %d to %d",
232 zi->registerState, state);
233 zi->registerChange = lastChange;
236 zebTargetInfo_close (zi->zti, 0);
237 dict_close (zi->dict);
241 isc_close (zi->isamc);
242 rec_close (&zi->records);
244 bf_cache (zi->bfs, state ? res_get (zi->res, "shadow") : NULL);
245 zi->registerState = state;
246 zi->records = rec_open (zi->bfs, 0);
247 if (!(zi->dict = dict_open (zi->bfs, FNAME_DICT, 40, 0)))
251 if (res_get_match (zi->res, "isam", "c", NULL))
253 if (!(zi->isamc = isc_open (zi->bfs, FNAME_ISAMC,
254 0, key_isamc_m(zi->res))))
260 if (!(zi->isam = is_open (zi->bfs, FNAME_ISAM, key_compare, 0,
261 sizeof (struct it_key), zi->res)))
264 zi->zti = zebTargetInfo_open (zi->records, 0);
265 init_charmap (zi->res);
269 static void register_unlock (ZServerInfo *zi)
271 static int waitSec = -1;
275 logf (LOG_LOG, "user/system: %ld/%ld",
276 (long) (tms2.tms_utime - tms1.tms_utime),
277 (long) (tms2.tms_stime - tms1.tms_stime));
281 char *s = res_get (zi->res, "debugRequestWait");
289 if (zi->registerState != -1)
290 zebraServerUnlock (zi->registerState);
293 bend_initresult *bend_init (bend_initrequest *q)
295 bend_initresult *r = odr_malloc (q->stream, sizeof(*r));
296 ZServerInfo *zi = xmalloc (sizeof(*zi));
297 struct statserv_options_block *sob;
303 logf (LOG_DEBUG, "bend_init");
305 sob = statserv_getcontrol ();
306 logf (LOG_LOG, "Reading resources from %s", sob->configname);
307 if (!(zi->res = res_open (sob->configname)))
309 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
312 zi->dh = data1_create ();
313 zi->bfs = bfs_create (res_get (zi->res, "register"));
314 bf_lockDir (zi->bfs, res_get (zi->res, "lockDir"));
315 data1_set_tabpath (zi->dh, res_get(zi->res, "profilePath"));
317 zi->registerState = -1; /* trigger open of registers! */
318 zi->registerChange = 0;
321 zi->odr = odr_createmem (ODR_ENCODE);
322 zi->registered_sets = NULL;
326 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
328 ZServerInfo *zi = handle;
329 bend_searchresult *r = odr_malloc (q->stream, sizeof(*r));
338 zi->errString = NULL;
340 logf (LOG_LOG, "ResultSet '%s'", q->setname);
341 switch (q->query->which)
343 case Z_Query_type_1: case Z_Query_type_101:
344 r->errcode = rpn_search (zi, q->query->u.type_1,
345 q->num_bases, q->basenames, q->setname,
347 r->errstring = zi->errString;
352 register_unlock (zi);
356 struct fetch_control {
359 char *record_int_buf;
364 static int record_ext_read (void *fh, char *buf, size_t count)
366 struct fetch_control *fc = fh;
367 return read (fc->fd, buf, count);
370 static off_t record_ext_seek (void *fh, off_t offset)
372 struct fetch_control *fc = fh;
373 return lseek (fc->fd, offset + fc->record_offset, SEEK_SET);
376 static off_t record_ext_tell (void *fh)
378 struct fetch_control *fc = fh;
379 return lseek (fc->fd, 0, SEEK_CUR) - fc->record_offset;
382 static off_t record_int_seek (void *fh, off_t offset)
384 struct fetch_control *fc = fh;
385 return (off_t) (fc->record_int_pos = offset);
388 static off_t record_int_tell (void *fh)
390 struct fetch_control *fc = fh;
391 return (off_t) fc->record_int_pos;
394 static int record_int_read (void *fh, char *buf, size_t count)
396 struct fetch_control *fc = fh;
397 int l = fc->record_int_len - fc->record_int_pos;
400 l = (l < count) ? l : count;
401 memcpy (buf, fc->record_int_buf + fc->record_int_pos, l);
402 fc->record_int_pos += l;
406 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
407 oid_value input_format, Z_RecordComposition *comp,
408 oid_value *output_format, char **rec_bufp,
409 int *rec_lenp, char **basenamep)
412 char *fname, *file_type, *basename;
414 struct recRetrieveCtrl retrieveCtrl;
416 struct fetch_control fc;
418 rec = rec_get (zi->records, sysno);
421 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
424 file_type = rec->info[recInfo_fileType];
425 fname = rec->info[recInfo_filename];
426 basename = rec->info[recInfo_databaseName];
427 *basenamep = odr_malloc (stream, strlen(basename)+1);
428 strcpy (*basenamep, basename);
430 if (!(rt = recType_byName (file_type, subType)))
432 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
436 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
437 retrieveCtrl.fh = &fc;
439 if (rec->size[recInfo_storeData] > 0)
441 retrieveCtrl.readf = record_int_read;
442 retrieveCtrl.seekf = record_int_seek;
443 retrieveCtrl.tellf = record_int_tell;
444 fc.record_int_len = rec->size[recInfo_storeData];
445 fc.record_int_buf = rec->info[recInfo_storeData];
446 fc.record_int_pos = 0;
447 logf (LOG_DEBUG, "Internal retrieve. %d bytes", fc.record_int_len);
451 if ((fc.fd = open (fname, O_BINARY|O_RDONLY)) == -1)
453 logf (LOG_WARN|LOG_ERRNO, "Retrieve fail; missing file: %s",
458 memcpy (&fc.record_offset, rec->info[recInfo_offset],
459 sizeof(fc.record_offset));
461 retrieveCtrl.readf = record_ext_read;
462 retrieveCtrl.seekf = record_ext_seek;
463 retrieveCtrl.tellf = record_ext_tell;
465 record_ext_seek (retrieveCtrl.fh, 0);
467 retrieveCtrl.subType = subType;
468 retrieveCtrl.localno = sysno;
469 retrieveCtrl.score = score;
470 retrieveCtrl.odr = stream;
471 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
472 retrieveCtrl.comp = comp;
473 retrieveCtrl.diagnostic = 0;
474 retrieveCtrl.dh = zi->dh;
475 (*rt->retrieve)(&retrieveCtrl);
476 *output_format = retrieveCtrl.output_format;
477 *rec_bufp = retrieveCtrl.rec_buf;
478 *rec_lenp = retrieveCtrl.rec_len;
483 return retrieveCtrl.diagnostic;
486 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
488 ZServerInfo *zi = handle;
489 bend_fetchresult *r = odr_malloc (q->stream, sizeof(*r));
491 ZServerSetSysno *records;
497 r->basename = "base";
502 positions[0] = q->number;
503 records = resultSetSysnoGet (zi, q->setname, 1, positions);
506 logf (LOG_DEBUG, "resultSetRecordGet, error");
508 register_unlock (zi);
511 if (!records[0].sysno)
514 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
515 register_unlock (zi);
518 r->errcode = record_fetch (zi, records[0].sysno,
519 records[0].score, q->stream, q->format,
520 q->comp, &r->format, &r->record, &r->len,
522 resultSetSysnoDel (zi, records, 1);
523 register_unlock (zi);
527 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
529 ZServerInfo *zi = handle;
531 register_unlock (zi);
535 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
537 ZServerInfo *zi = handle;
538 bend_scanresult *r = odr_malloc (q->stream, sizeof(*r));
546 r->term_position = q->term_position;
547 r->num_entries = q->num_entries;
548 r->errcode = rpn_scan (zi, q->term,
550 q->num_bases, q->basenames,
552 &r->num_entries, &r->entries, &status);
553 r->errstring = zi->errString;
555 register_unlock (zi);
559 void bend_close (void *handle)
561 ZServerInfo *zi = handle;
564 resultSetDestroy (zi);
565 dict_close (zi->dict);
569 isc_close (zi->isamc);
570 rec_close (&zi->records);
571 register_unlock (zi);
573 bfs_destroy (zi->bfs);
574 data1_destroy (zi->dh);
578 int main (int argc, char **argv)
580 struct statserv_options_block *sob;
582 sob = statserv_getcontrol ();
583 strcpy (sob->configname, FNAME_CONFIG);
584 statserv_setcontrol (sob);
586 return statserv_main (argc, argv);