2 * Copyright (C) 1995-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.45 1996-12-23 15:30:45 adam
9 * Bug fix: result sets weren't deleted after server shut down.
11 * Revision 1.44 1996/12/11 12:08:01 adam
12 * Added better compression.
14 * Revision 1.43 1996/11/15 15:03:58 adam
15 * Logging of execution speed by using the times(2) call.
17 * Revision 1.42 1996/11/08 11:10:36 adam
18 * Buffers used during file match got bigger.
19 * Compressed ISAM support everywhere.
20 * Bug fixes regarding masking characters in queries.
21 * Redesigned Regexp-2 queries.
23 * Revision 1.41 1996/10/29 14:09:56 adam
24 * Use of cisam system - enabled if setting isamc is 1.
26 * Revision 1.40 1996/06/04 10:19:02 adam
27 * Minor changes - removed include of ctype.h.
29 * Revision 1.39 1996/05/31 09:07:05 quinn
30 * Work on character-set handling
32 * Revision 1.38 1996/05/14 11:34:01 adam
33 * Scan support in multiple registers/databases.
35 * Revision 1.37 1996/05/14 06:16:48 adam
36 * Compact use/set bytes used in search service.
38 * Revision 1.36 1996/05/01 13:46:37 adam
39 * First work on multiple records in one file.
40 * New option, -offset, to the "unread" command in the filter module.
42 * Revision 1.35 1996/03/26 16:01:14 adam
43 * New setting lockPath: directory of various lock files.
45 * Revision 1.34 1996/03/20 09:36:46 adam
46 * Function dict_lookup_grep got extra parameter, init_pos, which marks
47 * from which position in pattern approximate pattern matching should occur.
48 * Approximate pattern matching is used in relevance=re-2.
50 * Revision 1.33 1996/01/17 14:57:56 adam
51 * Prototype changed for reader functions in extract/retrieve. File
52 * is identified by 'void *' instead of 'int.
54 * Revision 1.32 1995/12/11 09:12:58 adam
55 * The rec_get function returns NULL if record doesn't exist - will
56 * happen in the server if the result set records have been deleted since
57 * the creation of the set (i.e. the search).
58 * The server saves a result temporarily if it is 'volatile', i.e. the
59 * set is register dependent.
61 * Revision 1.31 1995/12/08 16:22:56 adam
62 * Work on update while servers are running. Three lock files introduced.
63 * The servers reload their registers when necessary, but they don't
64 * reestablish result sets yet.
66 * Revision 1.30 1995/12/07 17:38:48 adam
67 * Work locking mechanisms for concurrent updates/commit.
69 * Revision 1.29 1995/12/04 14:22:32 adam
70 * Extra arg to recType_byName.
71 * Started work on new regular expression parsed input to
74 * Revision 1.28 1995/11/28 09:09:48 adam
75 * Zebra config renamed.
76 * Use setting 'recordId' to identify record now.
77 * Bug fix in recindex.c: rec_release_blocks was invokeded even
78 * though the blocks were already released.
79 * File traversal properly deletes records when needed.
81 * Revision 1.27 1995/11/27 13:58:54 adam
82 * New option -t. storeStore data implemented in server.
84 * Revision 1.26 1995/11/25 10:24:07 adam
85 * More record fields - they are enumerated now.
86 * New options: flagStoreData flagStoreKey.
88 * Revision 1.25 1995/11/21 15:29:13 adam
89 * Config file 'base' read by default by both indexer and server.
91 * Revision 1.24 1995/11/20 16:59:47 adam
92 * New update method: the 'old' keys are saved for each records.
94 * Revision 1.23 1995/11/16 17:00:56 adam
95 * Better logging of rpn query.
97 * Revision 1.22 1995/11/16 15:34:55 adam
98 * Uses new record management system in both indexer and server.
100 * Revision 1.21 1995/11/01 16:25:52 quinn
101 * *** empty log message ***
103 * Revision 1.20 1995/10/27 14:00:12 adam
104 * Implemented detection of database availability.
106 * Revision 1.19 1995/10/17 18:02:11 adam
107 * New feature: databases. Implemented as prefix to words in dictionary.
109 * Revision 1.18 1995/10/16 14:03:09 quinn
110 * Changes to support element set names and espec1
112 * Revision 1.17 1995/10/16 09:32:40 adam
113 * More work on relational op.
115 * Revision 1.16 1995/10/13 12:26:44 adam
116 * Optimization of truncation.
118 * Revision 1.15 1995/10/12 12:40:55 adam
119 * Bug fixes in rpn_prox.
121 * Revision 1.14 1995/10/09 16:18:37 adam
122 * Function dict_lookup_grep got extra client data parameter.
124 * Revision 1.13 1995/10/06 14:38:00 adam
125 * New result set method: r_score.
126 * Local no (sysno) and score is transferred to retrieveCtrl.
128 * Revision 1.12 1995/10/06 13:52:06 adam
129 * Bug fixes. Handler may abort further scanning.
131 * Revision 1.11 1995/10/06 10:43:57 adam
132 * Scan added. 'occurrences' in scan entries not set yet.
134 * Revision 1.10 1995/10/02 16:43:32 quinn
135 * Set default resulting record type in fetch.
137 * Revision 1.9 1995/10/02 15:18:52 adam
138 * New member in recRetrieveCtrl: diagnostic.
140 * Revision 1.8 1995/09/28 09:19:47 adam
141 * xfree/xmalloc used everywhere.
142 * Extract/retrieve method seems to work for text records.
144 * Revision 1.7 1995/09/27 16:17:32 adam
145 * More work on retrieve.
147 * Revision 1.6 1995/09/08 08:53:22 adam
148 * Record buffer maintained in server_info.
150 * Revision 1.5 1995/09/06 16:11:18 adam
151 * Option: only one word key per file.
153 * Revision 1.4 1995/09/06 10:33:04 adam
154 * More work on present. Some log messages removed.
156 * Revision 1.3 1995/09/05 15:28:40 adam
157 * More work on search engine.
159 * Revision 1.2 1995/09/04 12:33:43 adam
160 * Various cleanup. YAZ util used instead.
162 * Revision 1.1 1995/09/04 09:10:41 adam
163 * More work on index add/del/update.
164 * Merge sort implemented.
165 * Initial work on z39 server.
184 #include <sys/times.h>
188 ZServerInfo server_info;
191 static struct tms tms1;
192 static struct tms tms2;
195 static int register_lock (ZServerInfo *zi)
198 int state = zebraServerLockGetState(&lastChange);
208 zebraServerLock (state);
212 if (zi->registerState == state)
214 if (zi->registerChange >= lastChange)
216 logf (LOG_LOG, "Register completely updated since last access");
218 else if (zi->registerState == -1)
219 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
222 logf (LOG_LOG, "Register has changed state from %d to %d",
223 zi->registerState, state);
224 zi->registerChange = lastChange;
227 zebTargetInfo_close (zi->zti, 0);
228 dict_close (zi->dict);
232 isc_close (zi->isamc);
233 rec_close (&zi->records);
236 zi->registerState = state;
237 zi->records = rec_open (0);
238 if (!(zi->dict = dict_open (FNAME_DICT, 40, 0)))
242 if (res_get_match (common_resource, "isam", "c", NULL))
244 if (!(zi->isamc = isc_open (FNAME_ISAMC, 0, key_isamc_m())))
250 if (!(zi->isam = is_open (FNAME_ISAM, key_compare, 0,
251 sizeof (struct it_key))))
254 zi->zti = zebTargetInfo_open (zi->records, 0);
259 static void register_unlock (ZServerInfo *zi)
261 static int waitSec = -1;
265 logf (LOG_LOG, "user/system: %ld/%ld",
266 (long) (tms2.tms_utime - tms1.tms_utime),
267 (long) (tms2.tms_stime - tms1.tms_stime));
271 char *s = res_get (common_resource, "debugRequestWait");
279 if (zi->registerState != -1)
280 zebraServerUnlock (zi->registerState);
283 bend_initresult *bend_init (bend_initrequest *q)
285 static bend_initresult r;
286 static char *name = "zserver";
292 logf (LOG_DEBUG, "bend_init");
294 if (!common_resource)
296 struct statserv_options_block *sob;
298 sob = statserv_getcontrol ();
299 logf (LOG_LOG, "Reading resources from %s", sob->configname);
300 if (!(common_resource = res_open (sob->configname)))
302 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
305 bf_lockDir (res_get (common_resource, "lockDir"));
306 data1_set_tabpath (res_get(common_resource, "profilePath"));
308 server_info.sets = NULL;
309 server_info.registerState = -1; /* trigger open of registers! */
310 server_info.registerChange = 0;
312 server_info.records = NULL;
313 server_info.odr = odr_createmem (ODR_ENCODE);
317 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
319 static bend_searchresult r;
325 register_lock (&server_info);
326 odr_reset (server_info.odr);
327 server_info.errCode = 0;
328 server_info.errString = NULL;
330 logf (LOG_LOG, "ResultSet '%s'", q->setname);
331 switch (q->query->which)
333 case Z_Query_type_1: case Z_Query_type_101:
334 r.errcode = rpn_search (&server_info, q->query->u.type_1,
335 q->num_bases, q->basenames, q->setname,
337 r.errstring = server_info.errString;
342 register_unlock (&server_info);
346 static int record_offset;
348 static int record_ext_read (void *fh, char *buf, size_t count)
350 return read (*((int*) fh), buf, count);
353 static off_t record_ext_seek (void *fh, off_t offset)
355 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
358 static int record_int_pos;
359 static char *record_int_buf;
360 static int record_int_len;
362 static off_t record_int_seek (void *fh, off_t offset)
364 return (off_t) (record_int_pos = offset);
367 static int record_int_read (void *fh, char *buf, size_t count)
369 int l = record_int_len - record_int_pos;
372 l = (l < count) ? l : count;
373 memcpy (buf, record_int_buf + record_int_pos, l);
378 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
379 oid_value input_format, Z_RecordComposition *comp,
380 oid_value *output_format, char **rec_bufp,
381 int *rec_lenp, char **basenamep)
384 char *fname, *file_type, *basename;
387 struct recRetrieveCtrl retrieveCtrl;
390 rec = rec_get (zi->records, sysno);
393 char *msg = "Record is deleted\n";
394 *output_format = VAL_SUTRS;
396 *rec_lenp = strlen (msg);
397 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
400 file_type = rec->info[recInfo_fileType];
401 fname = rec->info[recInfo_filename];
402 basename = rec->info[recInfo_databaseName];
403 *basenamep = odr_malloc (stream, strlen(basename)+1);
404 strcpy (*basenamep, basename);
406 if (!(rt = recType_byName (file_type, subType)))
408 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
412 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
413 if (rec->size[recInfo_storeData] > 0)
415 retrieveCtrl.readf = record_int_read;
416 retrieveCtrl.seekf = record_int_seek;
417 record_int_len = rec->size[recInfo_storeData];
418 record_int_buf = rec->info[recInfo_storeData];
420 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
424 if ((fd = open (fname, O_RDONLY)) == -1)
426 char *msg = "Record doesn't exist\n";
427 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
428 *output_format = VAL_SUTRS;
430 *rec_lenp = strlen (msg);
432 return 0; /* or 14: System error in presenting records */
435 memcpy (&record_offset, rec->info[recInfo_offset],
436 sizeof(record_offset));
438 retrieveCtrl.fh = &fd;
439 retrieveCtrl.readf = record_ext_read;
440 retrieveCtrl.seekf = record_ext_seek;
442 record_ext_seek (retrieveCtrl.fh, 0);
444 retrieveCtrl.subType = subType;
445 retrieveCtrl.localno = sysno;
446 retrieveCtrl.score = score;
447 retrieveCtrl.odr = stream;
448 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
449 retrieveCtrl.comp = comp;
450 retrieveCtrl.diagnostic = 0;
451 (*rt->retrieve)(&retrieveCtrl);
452 *output_format = retrieveCtrl.output_format;
453 *rec_bufp = retrieveCtrl.rec_buf;
454 *rec_lenp = retrieveCtrl.rec_len;
459 return retrieveCtrl.diagnostic;
462 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
464 static bend_fetchresult r;
466 ZServerSetSysno *records;
468 register_lock (&server_info);
474 odr_reset (server_info.odr);
475 server_info.errCode = 0;
477 positions[0] = q->number;
478 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
481 logf (LOG_DEBUG, "resultSetRecordGet, error");
483 register_unlock (&server_info);
486 if (!records[0].sysno)
489 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
490 register_unlock (&server_info);
493 r.errcode = record_fetch (&server_info, records[0].sysno,
494 records[0].score, q->stream, q->format,
495 q->comp, &r.format, &r.record, &r.len,
497 resultSetSysnoDel (&server_info, records, 1);
498 register_unlock (&server_info);
502 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
504 register_lock (&server_info);
505 register_unlock (&server_info);
509 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
511 static bend_scanresult r;
514 register_lock (&server_info);
515 odr_reset (server_info.odr);
516 server_info.errCode = 0;
517 server_info.errString = 0;
519 r.term_position = q->term_position;
520 r.num_entries = q->num_entries;
521 r.errcode = rpn_scan (&server_info, q->term,
523 q->num_bases, q->basenames,
525 &r.num_entries, &r.entries, &status);
526 r.errstring = server_info.errString;
528 register_unlock (&server_info);
532 void bend_close (void *handle)
534 if (server_info.records)
536 resultSetDestroy (&server_info);
537 dict_close (server_info.dict);
538 if (server_info.isam)
539 is_close (server_info.isam);
540 if (server_info.isamc)
541 isc_close (server_info.isamc);
542 rec_close (&server_info.records);
543 register_unlock (&server_info);
548 int main (int argc, char **argv)
550 struct statserv_options_block *sob;
552 sob = statserv_getcontrol ();
553 strcpy (sob->configname, FNAME_CONFIG);
554 statserv_setcontrol (sob);
556 return statserv_main (argc, argv);