2 * Copyright (C) 1995-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.47 1997-09-04 13:58:36 adam
8 * New retrieve/extract method tellf (added).
9 * Added O_BINARY for open calls.
11 * Revision 1.46 1997/07/28 08:30:47 adam
12 * Server returns diagnostic 14 when record doesn't exist.
14 * Revision 1.45 1996/12/23 15:30:45 adam
16 * Bug fix: result sets weren't deleted after server shut down.
18 * Revision 1.44 1996/12/11 12:08:01 adam
19 * Added better compression.
21 * Revision 1.43 1996/11/15 15:03:58 adam
22 * Logging of execution speed by using the times(2) call.
24 * Revision 1.42 1996/11/08 11:10:36 adam
25 * Buffers used during file match got bigger.
26 * Compressed ISAM support everywhere.
27 * Bug fixes regarding masking characters in queries.
28 * Redesigned Regexp-2 queries.
30 * Revision 1.41 1996/10/29 14:09:56 adam
31 * Use of cisam system - enabled if setting isamc is 1.
33 * Revision 1.40 1996/06/04 10:19:02 adam
34 * Minor changes - removed include of ctype.h.
36 * Revision 1.39 1996/05/31 09:07:05 quinn
37 * Work on character-set handling
39 * Revision 1.38 1996/05/14 11:34:01 adam
40 * Scan support in multiple registers/databases.
42 * Revision 1.37 1996/05/14 06:16:48 adam
43 * Compact use/set bytes used in search service.
45 * Revision 1.36 1996/05/01 13:46:37 adam
46 * First work on multiple records in one file.
47 * New option, -offset, to the "unread" command in the filter module.
49 * Revision 1.35 1996/03/26 16:01:14 adam
50 * New setting lockPath: directory of various lock files.
52 * Revision 1.34 1996/03/20 09:36:46 adam
53 * Function dict_lookup_grep got extra parameter, init_pos, which marks
54 * from which position in pattern approximate pattern matching should occur.
55 * Approximate pattern matching is used in relevance=re-2.
57 * Revision 1.33 1996/01/17 14:57:56 adam
58 * Prototype changed for reader functions in extract/retrieve. File
59 * is identified by 'void *' instead of 'int.
61 * Revision 1.32 1995/12/11 09:12:58 adam
62 * The rec_get function returns NULL if record doesn't exist - will
63 * happen in the server if the result set records have been deleted since
64 * the creation of the set (i.e. the search).
65 * The server saves a result temporarily if it is 'volatile', i.e. the
66 * set is register dependent.
68 * Revision 1.31 1995/12/08 16:22:56 adam
69 * Work on update while servers are running. Three lock files introduced.
70 * The servers reload their registers when necessary, but they don't
71 * reestablish result sets yet.
73 * Revision 1.30 1995/12/07 17:38:48 adam
74 * Work locking mechanisms for concurrent updates/commit.
76 * Revision 1.29 1995/12/04 14:22:32 adam
77 * Extra arg to recType_byName.
78 * Started work on new regular expression parsed input to
81 * Revision 1.28 1995/11/28 09:09:48 adam
82 * Zebra config renamed.
83 * Use setting 'recordId' to identify record now.
84 * Bug fix in recindex.c: rec_release_blocks was invokeded even
85 * though the blocks were already released.
86 * File traversal properly deletes records when needed.
88 * Revision 1.27 1995/11/27 13:58:54 adam
89 * New option -t. storeStore data implemented in server.
91 * Revision 1.26 1995/11/25 10:24:07 adam
92 * More record fields - they are enumerated now.
93 * New options: flagStoreData flagStoreKey.
95 * Revision 1.25 1995/11/21 15:29:13 adam
96 * Config file 'base' read by default by both indexer and server.
98 * Revision 1.24 1995/11/20 16:59:47 adam
99 * New update method: the 'old' keys are saved for each records.
101 * Revision 1.23 1995/11/16 17:00:56 adam
102 * Better logging of rpn query.
104 * Revision 1.22 1995/11/16 15:34:55 adam
105 * Uses new record management system in both indexer and server.
107 * Revision 1.21 1995/11/01 16:25:52 quinn
108 * *** empty log message ***
110 * Revision 1.20 1995/10/27 14:00:12 adam
111 * Implemented detection of database availability.
113 * Revision 1.19 1995/10/17 18:02:11 adam
114 * New feature: databases. Implemented as prefix to words in dictionary.
116 * Revision 1.18 1995/10/16 14:03:09 quinn
117 * Changes to support element set names and espec1
119 * Revision 1.17 1995/10/16 09:32:40 adam
120 * More work on relational op.
122 * Revision 1.16 1995/10/13 12:26:44 adam
123 * Optimization of truncation.
125 * Revision 1.15 1995/10/12 12:40:55 adam
126 * Bug fixes in rpn_prox.
128 * Revision 1.14 1995/10/09 16:18:37 adam
129 * Function dict_lookup_grep got extra client data parameter.
131 * Revision 1.13 1995/10/06 14:38:00 adam
132 * New result set method: r_score.
133 * Local no (sysno) and score is transferred to retrieveCtrl.
135 * Revision 1.12 1995/10/06 13:52:06 adam
136 * Bug fixes. Handler may abort further scanning.
138 * Revision 1.11 1995/10/06 10:43:57 adam
139 * Scan added. 'occurrences' in scan entries not set yet.
141 * Revision 1.10 1995/10/02 16:43:32 quinn
142 * Set default resulting record type in fetch.
144 * Revision 1.9 1995/10/02 15:18:52 adam
145 * New member in recRetrieveCtrl: diagnostic.
147 * Revision 1.8 1995/09/28 09:19:47 adam
148 * xfree/xmalloc used everywhere.
149 * Extract/retrieve method seems to work for text records.
151 * Revision 1.7 1995/09/27 16:17:32 adam
152 * More work on retrieve.
154 * Revision 1.6 1995/09/08 08:53:22 adam
155 * Record buffer maintained in server_info.
157 * Revision 1.5 1995/09/06 16:11:18 adam
158 * Option: only one word key per file.
160 * Revision 1.4 1995/09/06 10:33:04 adam
161 * More work on present. Some log messages removed.
163 * Revision 1.3 1995/09/05 15:28:40 adam
164 * More work on search engine.
166 * Revision 1.2 1995/09/04 12:33:43 adam
167 * Various cleanup. YAZ util used instead.
169 * Revision 1.1 1995/09/04 09:10:41 adam
170 * More work on index add/del/update.
171 * Merge sort implemented.
172 * Initial work on z39 server.
191 #include <sys/times.h>
195 ZServerInfo server_info;
198 static struct tms tms1;
199 static struct tms tms2;
202 static int register_lock (ZServerInfo *zi)
205 int state = zebraServerLockGetState(&lastChange);
215 zebraServerLock (state);
219 if (zi->registerState == state)
221 if (zi->registerChange >= lastChange)
223 logf (LOG_LOG, "Register completely updated since last access");
225 else if (zi->registerState == -1)
226 logf (LOG_LOG, "Reading register using state %d pid=%ld", state,
229 logf (LOG_LOG, "Register has changed state from %d to %d",
230 zi->registerState, state);
231 zi->registerChange = lastChange;
234 zebTargetInfo_close (zi->zti, 0);
235 dict_close (zi->dict);
239 isc_close (zi->isamc);
240 rec_close (&zi->records);
243 zi->registerState = state;
244 zi->records = rec_open (0);
245 if (!(zi->dict = dict_open (FNAME_DICT, 40, 0)))
249 if (res_get_match (common_resource, "isam", "c", NULL))
251 if (!(zi->isamc = isc_open (FNAME_ISAMC, 0, key_isamc_m())))
257 if (!(zi->isam = is_open (FNAME_ISAM, key_compare, 0,
258 sizeof (struct it_key))))
261 zi->zti = zebTargetInfo_open (zi->records, 0);
266 static void register_unlock (ZServerInfo *zi)
268 static int waitSec = -1;
272 logf (LOG_LOG, "user/system: %ld/%ld",
273 (long) (tms2.tms_utime - tms1.tms_utime),
274 (long) (tms2.tms_stime - tms1.tms_stime));
278 char *s = res_get (common_resource, "debugRequestWait");
286 if (zi->registerState != -1)
287 zebraServerUnlock (zi->registerState);
290 bend_initresult *bend_init (bend_initrequest *q)
292 static bend_initresult r;
293 static char *name = "zserver";
299 logf (LOG_DEBUG, "bend_init");
301 if (!common_resource)
303 struct statserv_options_block *sob;
305 sob = statserv_getcontrol ();
306 logf (LOG_LOG, "Reading resources from %s", sob->configname);
307 if (!(common_resource = res_open (sob->configname)))
309 logf (LOG_FATAL, "Cannot open resource `%s'", sob->configname);
312 bf_lockDir (res_get (common_resource, "lockDir"));
313 data1_set_tabpath (res_get(common_resource, "profilePath"));
315 server_info.sets = NULL;
316 server_info.registerState = -1; /* trigger open of registers! */
317 server_info.registerChange = 0;
319 server_info.records = NULL;
320 server_info.odr = odr_createmem (ODR_ENCODE);
324 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
326 static bend_searchresult r;
332 register_lock (&server_info);
333 odr_reset (server_info.odr);
334 server_info.errCode = 0;
335 server_info.errString = NULL;
337 logf (LOG_LOG, "ResultSet '%s'", q->setname);
338 switch (q->query->which)
340 case Z_Query_type_1: case Z_Query_type_101:
341 r.errcode = rpn_search (&server_info, q->query->u.type_1,
342 q->num_bases, q->basenames, q->setname,
344 r.errstring = server_info.errString;
349 register_unlock (&server_info);
353 static int record_offset;
355 static int record_ext_read (void *fh, char *buf, size_t count)
357 return read (*((int*) fh), buf, count);
360 static off_t record_ext_seek (void *fh, off_t offset)
362 return lseek (*((int*) fh), offset + record_offset, SEEK_SET);
365 static off_t record_ext_tell (void *fh)
367 return lseek (*((int*) fh), 0, SEEK_CUR) - record_offset;
370 static int record_int_pos;
371 static char *record_int_buf;
372 static int record_int_len;
374 static off_t record_int_seek (void *fh, off_t offset)
376 return (off_t) (record_int_pos = offset);
379 static off_t record_int_tell (void *fh)
381 return (off_t) record_int_pos;
384 static int record_int_read (void *fh, char *buf, size_t count)
386 int l = record_int_len - record_int_pos;
389 l = (l < count) ? l : count;
390 memcpy (buf, record_int_buf + record_int_pos, l);
395 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
396 oid_value input_format, Z_RecordComposition *comp,
397 oid_value *output_format, char **rec_bufp,
398 int *rec_lenp, char **basenamep)
401 char *fname, *file_type, *basename;
404 struct recRetrieveCtrl retrieveCtrl;
407 rec = rec_get (zi->records, sysno);
410 logf (LOG_DEBUG, "rec_get fail on sysno=%d", sysno);
413 file_type = rec->info[recInfo_fileType];
414 fname = rec->info[recInfo_filename];
415 basename = rec->info[recInfo_databaseName];
416 *basenamep = odr_malloc (stream, strlen(basename)+1);
417 strcpy (*basenamep, basename);
419 if (!(rt = recType_byName (file_type, subType)))
421 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
425 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
426 if (rec->size[recInfo_storeData] > 0)
428 retrieveCtrl.readf = record_int_read;
429 retrieveCtrl.seekf = record_int_seek;
430 retrieveCtrl.tellf = record_int_tell;
431 record_int_len = rec->size[recInfo_storeData];
432 record_int_buf = rec->info[recInfo_storeData];
434 logf (LOG_DEBUG, "Internal retrieve. %d bytes", record_int_len);
438 if ((fd = open (fname, O_BINARY|O_RDONLY)) == -1)
440 logf (LOG_WARN|LOG_ERRNO, "Retrieve fail; missing file: %s",
445 memcpy (&record_offset, rec->info[recInfo_offset],
446 sizeof(record_offset));
448 retrieveCtrl.fh = &fd;
449 retrieveCtrl.readf = record_ext_read;
450 retrieveCtrl.seekf = record_ext_seek;
451 retrieveCtrl.tellf = record_ext_tell;
453 record_ext_seek (retrieveCtrl.fh, 0);
455 retrieveCtrl.subType = subType;
456 retrieveCtrl.localno = sysno;
457 retrieveCtrl.score = score;
458 retrieveCtrl.odr = stream;
459 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
460 retrieveCtrl.comp = comp;
461 retrieveCtrl.diagnostic = 0;
462 (*rt->retrieve)(&retrieveCtrl);
463 *output_format = retrieveCtrl.output_format;
464 *rec_bufp = retrieveCtrl.rec_buf;
465 *rec_lenp = retrieveCtrl.rec_len;
470 return retrieveCtrl.diagnostic;
473 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
475 static bend_fetchresult r;
477 ZServerSetSysno *records;
479 register_lock (&server_info);
485 odr_reset (server_info.odr);
486 server_info.errCode = 0;
488 positions[0] = q->number;
489 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
492 logf (LOG_DEBUG, "resultSetRecordGet, error");
494 register_unlock (&server_info);
497 if (!records[0].sysno)
500 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
501 register_unlock (&server_info);
504 r.errcode = record_fetch (&server_info, records[0].sysno,
505 records[0].score, q->stream, q->format,
506 q->comp, &r.format, &r.record, &r.len,
508 resultSetSysnoDel (&server_info, records, 1);
509 register_unlock (&server_info);
513 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
515 register_lock (&server_info);
516 register_unlock (&server_info);
520 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
522 static bend_scanresult r;
525 register_lock (&server_info);
526 odr_reset (server_info.odr);
527 server_info.errCode = 0;
528 server_info.errString = 0;
530 r.term_position = q->term_position;
531 r.num_entries = q->num_entries;
532 r.errcode = rpn_scan (&server_info, q->term,
534 q->num_bases, q->basenames,
536 &r.num_entries, &r.entries, &status);
537 r.errstring = server_info.errString;
539 register_unlock (&server_info);
543 void bend_close (void *handle)
545 if (server_info.records)
547 resultSetDestroy (&server_info);
548 dict_close (server_info.dict);
549 if (server_info.isam)
550 is_close (server_info.isam);
551 if (server_info.isamc)
552 isc_close (server_info.isamc);
553 rec_close (&server_info.records);
554 register_unlock (&server_info);
559 int main (int argc, char **argv)
561 struct statserv_options_block *sob;
563 sob = statserv_getcontrol ();
564 strcpy (sob->configname, FNAME_CONFIG);
565 statserv_setcontrol (sob);
567 return statserv_main (argc, argv);