1 /* Gateway kernel - Main
5 * Revision 1.17 1995/04/19 10:46:18 adam
6 * Persistency works much better now. New command: status - history-like
8 * Revision 1.16 1995/04/19 07:31:07 adam
9 * First work on Z39.50 persistence.
11 * Revision 1.15 1995/04/17 09:34:30 adam
12 * Timeout (idletime) adjustable. Minor changes in kernel.
14 * Revision 1.14 1995/03/28 11:42:34 adam
15 * First use of string-queue utility.
17 * Revision 1.13 1995/03/28 08:01:25 adam
18 * FIFO existence is used to test for a running kernel.
20 * Revision 1.12 1995/03/27 12:51:05 adam
21 * New log level in use: GW_LOG_ERRNO.
23 * Revision 1.11 1995/03/27 08:24:02 adam
24 * First use of gip interface and gw-db.
25 * First work on eti program.
27 * Revision 1.10 1995/03/01 14:32:25 adam
28 * Better diagnostics. Default is, that only one database selected when
31 * Revision 1.9 1995/02/23 08:32:17 adam
34 * Revision 1.7 1995/02/22 15:22:33 adam
35 * Much more checking of run-time state. Show command never retrieves
36 * more records than indicated by the previous search request. Help
37 * command available. The maximum number of records retrieved can be
40 * Revision 1.6 1995/02/22 08:51:34 adam
41 * Output function can be customized in fml, which is used to print
42 * the reply to reply_fd.
44 * Revision 1.5 1995/02/20 21:16:20 adam
45 * FML support. Bug fixes. Profile for drewdb.
47 * Revision 1.4 1995/02/17 17:06:16 adam
50 * Revision 1.3 1995/02/16 18:35:09 adam
51 * First use of Zdist library. Search requests are supported.
52 * Present requests are not supported yet.
54 * Revision 1.2 1995/02/16 13:21:00 adam
55 * Organization of resource files for targets and conversion
56 * language implemented.
58 * Revision 1.1 1995/02/15 17:45:29 adam
59 * First version of email gateway kernel. Email requests are read
60 * from stdin. The output is transferred to an MTA if 'From' is
61 * found in the header - or stdout if absent. No Z39.50 client is used.
70 #include <sys/types.h>
78 FILE *reply_fd = stdout;
80 struct gw_kernel_info info;
82 static void kernel_events (struct str_queue *queue, int userid)
84 char fifo_client_name[1024];
85 char fifo_server_name[1024];
94 timeout = atoi(gw_res_get (info.kernel_res, "gw.timeout", "600"));
95 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "kernel event loop");
97 sprintf (fifo_client_name, "fifo.c.%d", userid);
98 sprintf (fifo_server_name, "fifo.s.%d", userid);
100 gip = gips_initialize (fifo_server_name);
101 gips_open (gip, fifo_client_name);
102 gip_fd = gip_infileno (gip);
107 FD_SET (gip_fd, &set_r);
111 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "IPC select");
112 r = select (gip_fd+1, &set_r, NULL, NULL, &tv);
115 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, KERNEL_LOG, "select");
120 gw_log (GW_LOG_STAT, KERNEL_LOG, "Timeout after %d seconds",
123 save_p_state (userid);
126 if (FD_ISSET (gip_fd, &set_r))
128 char command[128], *cp;
130 if (!(lgets (command, 127, gip_fd)))
132 gw_log (GW_LOG_WARN, KERNEL_LOG, "Unexpected close");
135 if ((cp = strchr (command, '\n')))
137 gw_log (GW_LOG_STAT, KERNEL_LOG, "IPC: %s", command);
138 if (!strcmp (command, "mail"))
140 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Incoming mail...\n");
141 while (lgets (line_buf, sizeof(line_buf)-1, gip_fd))
142 str_queue_enq (queue, line_buf);
143 urp_start (continuation, queue);
145 load_p_state (userid);
148 while (str_queue_deq (queue, 0, 0))
151 else if (!strcmp (command, "stop"))
153 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "stop");
158 gw_log (GW_LOG_WARN, KERNEL_LOG, "Unknown IPC: %s", command);
165 unlink (fifo_client_name);
166 unlink (fifo_server_name);
169 int main (int argc, char **argv)
172 struct str_queue *queue;
174 info.kernel_res = NULL;
175 info.default_res = "default.res";
176 info.override_res = NULL;
181 info.override_portno = NULL;
182 info.override_hostname = NULL;
183 info.databases = NULL;
184 info.database = NULL;
192 info.kernel_res = gw_res_init ();
200 fprintf (stderr, "kernel [option..] [resource]\n");
201 fprintf (stderr, "If no resource file is given");
202 fprintf (stderr, " default.res is used\n");
203 fprintf (stderr, "Options:\n");
204 fprintf (stderr, " -d Enable debugging log\n");
205 fprintf (stderr, " -t target Open target immediately\n");
206 fprintf (stderr, " -g lang Set language\n");
207 fprintf (stderr, " -o resource Override with resource\n");
208 fprintf (stderr, " -h host Override host\n");
209 fprintf (stderr, " -p port Override port\n");
210 fprintf (stderr, " -l log Set Log file\n");
211 fprintf (stderr, " -i id Set IPC userid\n");
214 gw_log_level (GW_LOG_ALL & ~RES_DEBUG);
217 gw_log_level (GW_LOG_ALL);
221 strcpy (info.target, argv[0]+2);
225 strcpy (info.target, *++argv);
229 gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing target name");
235 info.lang = argv[0]+2;
243 gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing language name");
249 info.override_res = argv[0]+2;
253 info.override_res = *++argv;
257 gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing override name");
263 info.override_portno = argv[0]+2;
267 info.override_portno = *++argv;
271 gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing portno");
277 info.override_hostname = argv[0]+2;
281 info.override_hostname = *++argv;
285 gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing hostname");
291 gw_log_file (GW_LOG_ALL, argv[0]+2);
295 gw_log_file (GW_LOG_ALL, *++argv);
299 gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing log filename");
305 userid = atoi (argv[0]+2);
309 userid = atoi (*++argv);
313 gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing user id");
318 gw_log (GW_LOG_FATAL, KERNEL_LOG, "unknown option %s", *argv);
323 info.default_res = *argv;
325 if (!(queue = str_queue_mk ()))
327 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, KERNEL_LOG, "str_queue_mk");
333 kernel_events (queue, userid);
339 while (lgets (line_buf, sizeof(line_buf)-1, 0))
340 str_queue_enq (queue, line_buf);
341 urp_start (0, queue);
348 struct gw_user_set *user_set_add (const char *name, int hits,
349 const char *database,
350 struct ccl_rpn_node *rpn,
352 const char *search_str)
354 struct gw_user_set *s;
356 s = malloc (sizeof (*s));
359 s->name = gw_strdup (name);
361 s->database = gw_strdup (database);
363 s->present_flag = present_flag;
364 s->search_str = gw_strdup (search_str);
370 void user_set_init (void)
372 struct gw_user_set *s, *s1;
374 for (s = info.sets; s; s = s1)
378 ccl_rpn_delete (s->rpn);
385 struct gw_user_set *user_set_search (const char *name)
387 struct gw_user_set *s;
391 for (s = info.sets; s; s = s->prev)
392 if (!strcmp (s->name, name))
398 static void fml_inf_write (int ch)
402 static FILE *fml_inf;
404 static int fml_inf_read (void)
406 return getc (fml_inf);
410 void read_kernel_res (void)
412 char path_prefix[128];
416 char resource_name[256];
421 ccl_qual_rm (&info.bibset);
422 info.bibset = ccl_qual_mk ();
425 gw_res_close (info.kernel_res);
426 info.kernel_res = gw_res_init ();
428 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reading kernel resource, default %s",
431 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reading kernel resource, target %s",
434 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reading kernel resource, lang %s",
437 if (gw_res_merge (info.kernel_res, info.default_res))
439 gw_log (GW_LOG_WARN, KERNEL_LOG, "Couldn't read resource file %s",
443 strcpy (path_prefix, gw_res_get (info.kernel_res, "gw.path", "."));
447 sprintf (resource_name, "gw.target.%s", info.target);
448 v = gw_res_get (info.kernel_res, resource_name, NULL);
451 sprintf (fname, "%s/%s", path_prefix, v);
452 gw_res_merge (info.kernel_res, fname);
457 sprintf (resource_name, "gw.lang.%s", info.lang);
458 v = gw_res_get (info.kernel_res, resource_name, NULL);
461 sprintf (fname, "%s/%s", path_prefix, v);
462 gw_res_merge (info.kernel_res, fname);
465 if (info.override_res)
467 sprintf (fname, "%s/%s", path_prefix, info.override_res);
468 gw_res_merge (info.kernel_res, fname);
470 v = gw_res_get (info.kernel_res, "gw.bibset", NULL);
475 sprintf (fname, "%s/%s", path_prefix, v);
476 bib_inf = fopen (fname, "r");
478 gw_log (GW_LOG_WARN, KERNEL_LOG, "cannot open %s", fname);
481 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reading bib file %s", fname);
482 ccl_qual_file (info.bibset, bib_inf);
486 sprintf (resource_name, "gw.target.%s", info.target);
487 if (*info.target && ! gw_res_get (info.kernel_res, resource_name, NULL))
489 /* target is there, and there is no sub-resource for it... */
492 if ((split = strchr (info.target, ':')))
494 strncpy (info.hostname, info.target, sizeof(info.hostname)-1);
496 info.port = atoi (split);
498 info.port = atoi (gw_res_get
499 (info.kernel_res, "gw.portno", "210"));
503 strncpy (info.hostname, gw_res_get (info.kernel_res,
504 "gw.hostname", "localhost"),
505 sizeof(info.hostname)-1);
506 info.port = atoi (gw_res_get (info.kernel_res,
507 "gw.portno", "210"));
510 free (info.databases);
512 free (info.database);
513 v = gw_res_get (info.kernel_res, "gw.databases", "");
514 info.databases = gw_strdup (v);
515 for (cp = info.databases; (cp = strchr (cp, ' ')); cp++)
517 v = gw_res_get (info.kernel_res, "gw.database", "");
518 if (*v == '\0' && *info.databases)
521 cp = strchr (info.databases, ',');
523 len = cp ? (cp-info.databases) : strlen (info.databases);
524 info.database = malloc (len+1);
525 assert (info.database);
526 memcpy (info.database, info.databases, len);
527 info.database[len] = '\0';
531 info.database = gw_strdup (v);
532 for (cp = info.database; (cp = strchr (cp, ' ')); cp++)
535 if (info.override_portno)
536 info.port = atoi (info.override_portno);
537 if (info.override_hostname)
538 strncpy (info.hostname, info.override_hostname,
539 sizeof(info.hostname)-1);
540 v = gw_res_get (info.kernel_res, "gw.result.set", NULL);
541 info.setno = v ? -1 : 0;
545 v = gw_res_get (info.kernel_res, "gw.fml", "default.fml");
546 sprintf (fname, "%s/%s", path_prefix, v);
547 fml_inf = fopen (fname, "r");
549 gw_log (GW_LOG_WARN, KERNEL_LOG,
550 "cannot open fml script %s", fname);
553 info.fml = fml_open ();
554 info.fml->read_func = fml_inf_read;
555 info.fml->write_func = fml_inf_write;
556 fml_preprocess (info.fml);