2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.23 1995-11-16 17:00:56 adam
8 * Better logging of rpn query.
10 * Revision 1.22 1995/11/16 15:34:55 adam
11 * Uses new record management system in both indexer and server.
13 * Revision 1.21 1995/11/01 16:25:52 quinn
14 * *** empty log message ***
16 * Revision 1.20 1995/10/27 14:00:12 adam
17 * Implemented detection of database availability.
19 * Revision 1.19 1995/10/17 18:02:11 adam
20 * New feature: databases. Implemented as prefix to words in dictionary.
22 * Revision 1.18 1995/10/16 14:03:09 quinn
23 * Changes to support element set names and espec1
25 * Revision 1.17 1995/10/16 09:32:40 adam
26 * More work on relational op.
28 * Revision 1.16 1995/10/13 12:26:44 adam
29 * Optimization of truncation.
31 * Revision 1.15 1995/10/12 12:40:55 adam
32 * Bug fixes in rpn_prox.
34 * Revision 1.14 1995/10/09 16:18:37 adam
35 * Function dict_lookup_grep got extra client data parameter.
37 * Revision 1.13 1995/10/06 14:38:00 adam
38 * New result set method: r_score.
39 * Local no (sysno) and score is transferred to retrieveCtrl.
41 * Revision 1.12 1995/10/06 13:52:06 adam
42 * Bug fixes. Handler may abort further scanning.
44 * Revision 1.11 1995/10/06 10:43:57 adam
45 * Scan added. 'occurrences' in scan entries not set yet.
47 * Revision 1.10 1995/10/02 16:43:32 quinn
48 * Set default resulting record type in fetch.
50 * Revision 1.9 1995/10/02 15:18:52 adam
51 * New member in recRetrieveCtrl: diagnostic.
53 * Revision 1.8 1995/09/28 09:19:47 adam
54 * xfree/xmalloc used everywhere.
55 * Extract/retrieve method seems to work for text records.
57 * Revision 1.7 1995/09/27 16:17:32 adam
58 * More work on retrieve.
60 * Revision 1.6 1995/09/08 08:53:22 adam
61 * Record buffer maintained in server_info.
63 * Revision 1.5 1995/09/06 16:11:18 adam
64 * Option: only one word key per file.
66 * Revision 1.4 1995/09/06 10:33:04 adam
67 * More work on present. Some log messages removed.
69 * Revision 1.3 1995/09/05 15:28:40 adam
70 * More work on search engine.
72 * Revision 1.2 1995/09/04 12:33:43 adam
73 * Various cleanup. YAZ util used instead.
75 * Revision 1.1 1995/09/04 09:10:41 adam
76 * More work on index add/del/update.
77 * Merge sort implemented.
78 * Initial work on z39 server.
92 ZServerInfo server_info;
94 bend_initresult *bend_init (bend_initrequest *q)
96 static bend_initresult r;
97 static char *name = "zserver";
103 logf (LOG_DEBUG, "bend_init");
104 data1_tabpath = res_get(common_resource, "data1_tabpath");
105 server_info.sets = NULL;
107 server_info.records = rec_open (0);
109 if (!(server_info.sys_idx_fd = open (FNAME_SYS_IDX, O_RDONLY)))
111 logf (LOG_WARN|LOG_ERRNO, "sys_idx open fail");
113 r.errstring = "sys_idx open fail";
117 if (!(server_info.fileDict = dict_open (FNAME_FILE_DICT, 10, 0)))
119 logf (LOG_WARN, "dict_open fail: fname dict");
121 r.errstring = "dict_open fail: fname dict";
124 if (!(server_info.wordDict = dict_open (FNAME_WORD_DICT, 40, 0)))
126 logf (LOG_WARN, "dict_open fail: word dict");
127 dict_close (server_info.fileDict);
129 r.errstring = "dict_open fail: word dict";
132 if (!(server_info.wordIsam = is_open (FNAME_WORD_ISAM, key_compare, 0,
133 sizeof (struct it_key))))
135 logf (LOG_WARN, "is_open fail: word isam");
136 dict_close (server_info.wordDict);
137 dict_close (server_info.fileDict);
139 r.errstring = "is_open fail: word isam";
142 server_info.odr = odr_createmem (ODR_ENCODE);
146 bend_searchresult *bend_search (void *handle, bend_searchrequest *q, int *fd)
148 static bend_searchresult r;
155 odr_reset (server_info.odr);
156 server_info.errCode = 0;
157 server_info.errString = NULL;
159 logf (LOG_LOG, "ResultSet '%s'", q->setname);
160 switch (q->query->which)
163 r.errcode = rpn_search (&server_info, q->query->u.type_1,
164 q->num_bases, q->basenames, q->setname,
166 r.errstring = server_info.errString;
174 static int record_read (int fd, char *buf, size_t count)
176 return read (fd, buf, count);
179 static int record_fetch (ZServerInfo *zi, int sysno, int score, ODR stream,
180 oid_value input_format, Z_RecordComposition *comp,
181 oid_value *output_format, char **rec_bufp,
187 char record_info[SYS_IDX_ENTRY_LEN];
189 char *fname, *file_type;
191 struct recRetrieveCtrl retrieveCtrl;
194 rec = rec_get (zi->records, sysno);
195 file_type = rec->info[0];
196 fname = rec->info[1];
198 if (lseek (zi->sys_idx_fd, sysno * SYS_IDX_ENTRY_LEN,
201 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: lseek of sys_idx");
204 if (read (zi->sys_idx_fd, record_info, SYS_IDX_ENTRY_LEN) == -1)
206 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: read of sys_idx");
209 file_type = record_info;
210 fname = record_info + strlen(record_info) + 1;
213 if (!(rt = recType_byName (file_type)))
215 logf (LOG_FATAL|LOG_ERRNO, "Retrieve: Cannot handle type %s",
219 logf (LOG_DEBUG, "retrieve localno=%d score=%d", sysno, score);
220 if ((retrieveCtrl.fd = open (fname, O_RDONLY)) == -1)
222 char *msg = "Record doesn't exist";
223 logf (LOG_WARN|LOG_ERRNO, "Retrieve: Open record file %s", fname);
224 *output_format = VAL_SUTRS;
226 *rec_lenp = strlen (msg);
230 return 0; /* or 14: System error in presenting records */
232 retrieveCtrl.localno = sysno;
233 retrieveCtrl.score = score;
234 retrieveCtrl.odr = stream;
235 retrieveCtrl.readf = record_read;
236 retrieveCtrl.input_format = retrieveCtrl.output_format = input_format;
237 retrieveCtrl.comp = comp;
238 retrieveCtrl.diagnostic = 0;
239 (*rt->retrieve)(&retrieveCtrl);
240 *output_format = retrieveCtrl.output_format;
241 *rec_bufp = retrieveCtrl.rec_buf;
242 *rec_lenp = retrieveCtrl.rec_len;
243 close (retrieveCtrl.fd);
247 return retrieveCtrl.diagnostic;
250 bend_fetchresult *bend_fetch (void *handle, bend_fetchrequest *q, int *num)
252 static bend_fetchresult r;
254 ZServerSetSysno *records;
260 odr_reset (server_info.odr);
261 server_info.errCode = 0;
263 positions[0] = q->number;
264 records = resultSetSysnoGet (&server_info, q->setname, 1, positions);
267 logf (LOG_DEBUG, "resultSetRecordGet, error");
271 if (!records[0].sysno)
274 logf (LOG_DEBUG, "Out of range. pos=%d", q->number);
277 r.errcode = record_fetch (&server_info, records[0].sysno,
278 records[0].score, q->stream, q->format,
279 q->comp, &r.format, &r.record, &r.len);
280 resultSetSysnoDel (&server_info, records, 1);
284 bend_deleteresult *bend_delete (void *handle, bend_deleterequest *q, int *num)
289 bend_scanresult *bend_scan (void *handle, bend_scanrequest *q, int *num)
291 static bend_scanresult r;
294 odr_reset (server_info.odr);
295 server_info.errCode = 0;
296 server_info.errString = 0;
298 r.term_position = q->term_position;
299 r.num_entries = q->num_entries;
300 r.errcode = rpn_scan (&server_info, q->term,
301 q->num_bases, q->basenames,
303 &r.num_entries, &r.entries, &status);
304 r.errstring = server_info.errString;
309 void bend_close (void *handle)
311 dict_close (server_info.fileDict);
312 dict_close (server_info.wordDict);
313 is_close (server_info.wordIsam);
315 rec_close (&server_info.records);
317 close (server_info.sys_idx_fd);
322 int main (int argc, char **argv)
324 char *base_name = "base";
326 if (!(common_resource = res_open (base_name)))
328 logf (LOG_FATAL, "Cannot open resource `%s'", base_name);
331 return statserv_main (argc, argv);