1 /* Gateway kernel - User Request Processor
5 * Revision 1.31 1995/05/01 12:43:38 adam
6 * First work on resource monitor program.
8 * Revision 1.30 1995/04/20 16:10:47 adam
9 * Modified to work with non-blocking zass-api. Not using non-blocking
12 * Revision 1.29 1995/04/19 16:01:58 adam
13 * Some hacks to get the FIFO communication work!! Isn't reliable.
14 * Resource gw.account added - default account info.
16 * Revision 1.28 1995/04/19 13:19:09 adam
17 * New command: account - for authentication.
19 * Revision 1.27 1995/04/19 10:46:19 adam
20 * Persistency works much better now. New command: status - history-like
22 * Revision 1.26 1995/04/19 07:31:12 adam
23 * First work on Z39.50 persistence.
25 * Revision 1.25 1995/04/17 09:34:33 adam
26 * Timeout (idletime) adjustable. Minor changes in kernel.
28 * Revision 1.24 1995/03/28 11:42:35 adam
29 * First use of string-queue utility.
31 * Revision 1.23 1995/03/28 08:01:28 adam
32 * FIFO existence is used to test for a running kernel.
34 * Revision 1.22 1995/03/27 12:51:05 adam
35 * New log level in use: GW_LOG_ERRNO.
37 * Revision 1.21 1995/03/27 08:24:04 adam
38 * First use of gip interface and gw-db.
39 * First work on eti program.
41 * Revision 1.20 1995/03/03 17:19:17 adam
42 * Smarter presentation. Bug fix in email header interpretation.
44 * Revision 1.19 1995/03/02 09:32:11 adam
45 * New presentation formats. f0=full, f1=brief, f2=mid
47 * Revision 1.18 1995/03/01 14:32:26 adam
48 * Better diagnostics. Default is, that only one database selected when
51 * Revision 1.17 1995/02/28 13:16:26 adam
52 * Configurable From: added.
54 * Revision 1.16 1995/02/23 10:08:20 adam
55 * Added logging of all user commands.
57 * Revision 1.15 1995/02/23 08:32:17 adam
60 * Revision 1.13 1995/02/22 16:54:42 adam
61 * Qualifiers of LOC target updated. More logging messages.
63 * Revision 1.12 1995/02/22 15:51:51 adam
64 * Bug fix: swap of parameter number and offset in function present.
66 * Revision 1.11 1995/02/22 15:22:33 adam
67 * Much more checking of run-time state. Show command never retrieves
68 * more records than indicated by the previous search request. Help
69 * command available. The maximum number of records retrieved can be
72 * Revision 1.10 1995/02/22 08:51:35 adam
73 * Output function can be customized in fml, which is used to print
74 * the reply to reply_fd.
76 * Revision 1.9 1995/02/21 17:46:21 adam
79 * Revision 1.8 1995/02/21 12:12:00 adam
80 * Diagnostic record with error info. observed.
82 * Revision 1.7 1995/02/20 21:16:20 adam
83 * FML support. Bug fixes. Profile for drewdb.
85 * Revision 1.6 1995/02/17 14:41:14 quinn
86 * Added simple display of records.
88 * Revision 1.5 1995/02/17 14:22:13 adam
89 * First steps of CCL show command. Not finished yet.
91 * Revision 1.4 1995/02/17 09:08:36 adam
92 * Reply with subject. CCL base command implemented.
94 * Revision 1.3 1995/02/16 18:35:09 adam
95 * First use of Zdist library. Search requests are supported.
96 * Present requests are not supported yet.
98 * Revision 1.2 1995/02/16 13:21:00 adam
99 * Organization of resource files for targets and conversion
100 * language implemented.
102 * Revision 1.1 1995/02/15 17:45:30 adam
103 * First version of email gateway kernel. Email requests are read
104 * from stdin. The output is transferred to an MTA if 'From' is
105 * found in the header - or stdout if absent. No Z39.50 client is used.
119 #include <strqueue.h>
122 static char line_buf[LINE_MAX+1];
124 static void put_esc_str (const char *s)
130 int reopen_target (void)
134 gw_log (GW_LOG_WARN, KERNEL_LOG, "Zass free...");
135 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reopen_target");
136 info.zass = zass_open (info.hostname, info.port, NULL, /* complete */
137 *info.account ? info.account : NULL);
140 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Cannot connect to target %s:%d",
141 info.hostname, info.port);
142 fprintf (reply_fd, "%s %s:%d\n",
143 gw_res_get (info.kernel_res, "gw.err.connect",
144 "Cannot connect to target"),
145 info.hostname, info.port);
148 v = gw_res_get (info.kernel_res, "gw.description", NULL);
152 fprintf (reply_fd, "\n");
154 fprintf (reply_fd, "%s %s:%d\n",
155 gw_res_get (info.kernel_res, "gw.msg.connect",
156 "Connection established to"),
157 info.hostname, info.port);
159 fprintf (reply_fd, "%s:\n%s\n",
160 gw_res_get (info.kernel_res, "gw.msg.databases",
161 "Available databases"),
164 fprintf (reply_fd, "%s:\n%s\n",
165 gw_res_get (info.kernel_res, "gw.msg.database",
166 "Selected databases"),
169 fprintf (reply_fd, "set=%d\n", info.setno);
171 fprintf (reply_fd, "set=Default\n");
176 static struct command_word {
178 char *resource_suffix;
186 { "continue", "continue" },
187 { "status", "status" },
188 { "cancel", "cancel" },
189 { "target", "target" },
191 { "account", "account" },
195 static int command_search (struct command_word *tab, struct ccl_token *cmd,
196 const char *resource_prefix)
200 assert (resource_prefix);
203 while (tab->default_value)
205 char *cp, command_names[60];
206 char resource_name[60];
209 sprintf (resource_name, "%s%s", resource_prefix,
210 tab->resource_suffix);
211 v = gw_res_get (info.kernel_res, resource_name, tab->default_value);
213 strcpy (command_names, v);
219 if ((split = strchr (cp, ' ')))
221 if (cmd->len == strlen(cp) &&
222 !memcmp (cmd->name, cp, cmd->len))
234 static struct error_no_struct {
237 } error_ccl_tab[] = {
239 { CCL_ERR_TERM_EXPECTED, "term.expected" },
240 { CCL_ERR_RP_EXPECTED, "rp.expected" },
241 { CCL_ERR_SETNAME_EXPECTED, "setname.expected" },
242 { CCL_ERR_OP_EXPECTED, "op.expected" },
243 { CCL_ERR_BAD_RP, "bad.rp" },
244 { CCL_ERR_UNKNOWN_QUAL, "unknown.qual" },
245 { CCL_ERR_DOUBLE_QUAL, "double.qual" },
246 { CCL_ERR_EQ_EXPECTED, "eq.expected" },
247 { CCL_ERR_BAD_RELATION, "bad.relation" },
248 { CCL_ERR_TRUNC_NOT_LEFT, "trunc.not.left" },
249 { CCL_ERR_TRUNC_NOT_BOTH, "trunc.not.both" },
250 { CCL_ERR_TRUNC_NOT_RIGHT, "trunc.not.right" },
254 static char *error_no_search (struct error_no_struct *tab, int no)
256 struct error_no_struct *p = tab;
257 while (p->resource_name)
260 return p->resource_name;
266 static int email_header (struct str_queue *sq,
267 char *from_str, char *subject_str)
271 while (str_queue_deq (sq, line_buf, LINE_MAX))
273 if (line_buf[0] == '\n')
275 if (memcmp (line_buf, "From ", 5) == 0)
276 sscanf (line_buf+4, "%s", from_str);
277 if (memcmp (line_buf, "Subject: ", 9) == 0 &&
278 sscanf (line_buf+9, "%s", subject_str+1) == 1)
279 strcpy (subject_str, line_buf+9);
284 static void help_general (void)
286 put_esc_str (gw_res_get (info.kernel_res, "gw.help.general",
287 "Commands available in this service:\n"));
290 static int exec_help (struct ccl_token *list)
292 static char *sep = "-------------------------------\\n";
297 put_esc_str (gw_res_get (info.kernel_res, "gw.help.target",
298 "target <name> - selects a given target\n"));
301 put_esc_str (gw_res_get (info.kernel_res, "gw.help.base",
302 "base <base>.. - selects databases\n"));
305 put_esc_str (gw_res_get (info.kernel_res, "gw.help.find",
306 "find <query> - performs a search request\n"));
309 put_esc_str (gw_res_get (info.kernel_res, "gw.help.show",
310 "show <spec> - retrieves and displays "
316 static void display_diag_error (int code, const char *addinfo)
320 sprintf (str, "gw.bib1.diag.%d", code);
321 fprintf (reply_fd, "%s %d:\n %s: '%s'\n",
322 gw_res_get (info.kernel_res, "gw.msg.z39errcode",
325 gw_res_get (info.kernel_res, str, ""), addinfo);
328 static int exec_find (struct ccl_token *list, const char *search_str)
330 const struct zass_searchent *p;
331 struct gw_user_set *us;
334 struct ccl_rpn_node *rpn;
338 if (info.setno == -1)
339 strcpy (setname, "Default");
341 sprintf (setname, "%d", info.setno);
342 rpn = ccl_find (info.bibset, list, &error, &pos);
345 const char *v = NULL, *n;
348 fprintf (reply_fd, " %*s^ - ", pos - line_buf, " ");
350 n = error_no_search (error_ccl_tab, error);
353 sprintf (name, "gw.err.%s", n);
354 v = gw_res_get (info.kernel_res, name, NULL);
357 v = ccl_err_msg (error);
358 fprintf (reply_fd, "%s\n", v);
361 ccl_pr_tree (rpn, reply_fd);
362 fprintf (reply_fd, "\n");
364 if (!*info.database )
366 fprintf (reply_fd, "%s\n",
367 gw_res_get (info.kernel_res, "gw.err.no.database",
368 "You must select database"));
371 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Searching in database %s",
374 fprintf (reply_fd, "Searching in database %s\n", info.database);
375 p = zass_p_search (info.zass, rpn, setname, info.database, info.sets);
378 fprintf (reply_fd, "Search fail\n");
381 if (p->errcode != -1)
383 display_diag_error (p->errcode, p->errstring);
386 fprintf (reply_fd, "%d %s\n", p->num,
387 gw_res_get (info.kernel_res, "gw.msg.hits", "hit(s)"));
388 us = user_set_add (setname, p->num, info.database, rpn, 1, search_str);
389 fprintf (reply_fd, "Result-set %s created\n", setname);
395 static int exec_account (struct ccl_token *list)
397 if (list->kind != CCL_TOK_EOL)
400 memcpy (info.account, list->name, len);
401 info.target[len] = '\0';
404 *info.account = '\0';
408 static int exec_target (struct ccl_token *list)
411 if (list->kind == CCL_TOK_EOL)
414 memcpy (info.target, list->name, len);
415 info.target [len] = '\0';
418 return reopen_target ();
421 static void exec_status_r (struct gw_user_set *sp)
425 exec_status_r (sp->prev);
426 fprintf (reply_fd, "%6s %7d %12.12s %.50s\n", sp->name, sp->hits,
427 sp->database, sp->search_str);
430 static int exec_status (struct ccl_token *list)
432 fprintf (reply_fd, " Name Hits Database Find\n");
433 exec_status_r (info.sets);
437 static int exec_base (struct ccl_token *list)
439 struct ccl_token *li = list;
443 if (list->kind == CCL_TOK_EOL)
445 free (info.database);
446 while (li->kind != CCL_TOK_EOL)
450 if (li->kind == CCL_TOK_COMMA)
453 info.database = malloc (len);
454 assert (info.database );
457 while (li->kind != CCL_TOK_EOL)
459 memcpy (info.database+len, li->name, li->len);
461 info.database[len++] = ',';
463 if (li->kind == CCL_TOK_COMMA)
466 info.database[len-1] = '\0';
470 struct command_word show_tab [] =
477 static void present (const char *set, int offset, int number,
478 struct ccl_token *format_token)
480 const struct zass_presentent *zp;
485 max_number = atoi (gw_res_get (info.kernel_res, "gw.max.show",
487 if (number > max_number)
489 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "present in set %s", set);
490 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "present of %d records from offset %d",
492 zp = zass_p_present(info.zass, (char *) set, offset, number);
498 int record_log_fd = -1;
499 const char *record_log_name;
501 record_log_name = gw_res_get (info.kernel_res, "gw.marc.log",
505 sprintf (path, "%s/%s", gw_res_get (info.kernel_res,
508 record_log_fd = open (path, O_WRONLY|O_CREAT|O_APPEND, 0666);
509 if (record_log_fd == -1)
510 gw_log (GW_LOG_WARN|GW_LOG_ERRNO, "Cannot open %s", path);
512 fprintf (reply_fd, gw_res_get (info.kernel_res,
514 "Got %d records from set %s"),
516 fprintf (reply_fd, "\n");
517 for (i = 0, pp = zp->records; pp; pp = pp->next, i++)
521 const char *arg_ar[5];
523 fprintf (reply_fd, "--- %d/%d ---\n",
524 i+offset, offset+zp->num-1);
525 if (!gw_res_get (info.kernel_res, "gw.ignore.which", NULL))
527 if (pp->which == ZASS_REC_DIAG)
529 display_diag_error (pp->errcode, pp->errstring);
532 else if (pp->which != ZASS_REC_USMARC)
534 fprintf (reply_fd, "Unknown record kind %d\n",
539 if (record_log_fd != -1)
540 write (record_log_fd, pp->record, strlen(pp->record));
541 rec = iso2709_cvt (pp->record);
547 len = format_token->len;
548 if (len >= sizeof(format_str))
549 len = sizeof(format_str)-1;
550 memcpy (format_str, format_token->name, len);
551 format_str[len] = '\0';
553 if (info.fml && format_token &&
554 (!strcmp (format_str, "0") || !strcmp (format_str, "1")
555 || !strcmp(format_str, "2")))
558 arg_ar[1] = format_str;
559 arg_ar[2] = " \\list";
560 arg_ar[3] = marc_to_str (info.fml, rec);
562 fml_exec_call_argv (info.fml, arg_ar);
565 iso2709_display (rec, reply_fd);
567 iso2709_display (rec, reply_fd);
572 fprintf (reply_fd, "Not a MARC record\n");
574 if (record_log_fd != -1)
575 close (record_log_fd);
579 static int exec_show (struct ccl_token *list)
582 struct ccl_token *set_token = NULL;
583 struct ccl_token *format_token = NULL;
584 struct ccl_token *li = list;
585 int no_of_present = 0;
588 while (li->kind != CCL_TOK_EOL)
591 if (li->next->kind == CCL_TOK_EQ)
593 if (li->kind == CCL_TOK_SET) /* set = <name> ? */
600 modifier_no = command_search (show_tab, li, "ccl.token.");
603 fprintf (reply_fd, "Unknown modifier in show\n");
607 if (modifier_no == 1) /* f = <name> ? */
609 else if (modifier_no == 2) /* p = <name> ? */
611 if (li->kind != CCL_TOK_EOL /* p = <name> - <name> ? */
612 && li->next->kind == CCL_TOK_MINUS
613 && li->next->next != CCL_TOK_EOL)
619 fprintf (reply_fd, "%s\n", "Missing token after '='");
628 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Got set=%.*s", set_token->len,
631 gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Got format=%.*s", format_token->len,
635 while (li->kind != CCL_TOK_EOL)
641 if (li->next->kind == CCL_TOK_EQ && li->kind != CCL_TOK_SET)
643 modifier_no = command_search (show_tab, li, "ccl.token.");
645 if (modifier_no == 2) /* p = <name> ? */
647 if (li->kind != CCL_TOK_EOL /* p = <name> - <name> ? */
648 && li->next->kind == CCL_TOK_MINUS
649 && li->next->next != CCL_TOK_EOL)
652 memcpy (tmp_str, li->name, len);
653 tmp_str [len] = '\0';
654 offset = atoi (tmp_str);
658 memcpy (tmp_str, li->name, len);
659 tmp_str [len] = '\0';
660 number = atoi (tmp_str) - offset + 1;
665 memcpy (tmp_str, li->name, len);
666 tmp_str [len] = '\0';
667 offset = atoi (tmp_str);
676 memcpy (tmp_str, li->name, len);
678 number = atoi (tmp_str);
682 if (offset > 0 && number > 0)
684 struct gw_user_set *us;
688 len = set_token->len;
689 memcpy (tmp_str, set_token->name, len);
691 us = user_set_search (tmp_str);
694 us = user_set_search (NULL);
695 if (us && us->hits != -1) /* proper result-set? */
697 if (offset <= us->hits)
699 if (offset+number-1 > us->hits)
700 number = us->hits - offset+1;
701 present (us->name, offset, number, format_token);
704 else if (!no_of_present) /* display error message once! */
706 fprintf (reply_fd, "%s\n",
707 gw_res_get (info.kernel_res, "gw.err.no.set",
708 "No result-set generated"));
713 if (!no_of_present) /* no records shown so far? */
715 struct gw_user_set *us;
718 us = user_set_search (NULL);
719 if (us && us->hits != -1) /* proper result-set? */
721 default_show = atoi (gw_res_get (info.kernel_res,
722 "gw.default.show", "20"));
723 if (us->hits > default_show)
724 present (us->name, 1, default_show, format_token);
725 else if (us->hits > 0)
726 present (us->name, 1, us->hits, format_token);
728 else /* display error message */
730 fprintf (reply_fd, "%s\n",
731 gw_res_get (info.kernel_res, "gw.err.no.set",
732 "No result-set generated"));
739 static int exec_command (const char *str)
741 struct ccl_token *cmd = ccl_tokenize (str);
744 if (cmd->kind != CCL_TOK_EOL &&
745 (no = command_search (command_tab, cmd, "ccl.command.")))
747 if (!info.zass && no != 9 && no != 4 && no != 11 && no != 7)
749 fprintf (reply_fd, "\n> %s\n", str);
750 if (!info.zass && (no == 1 || no == 2 || no == 3))
752 fprintf (reply_fd, "%s\n",
753 gw_res_get (info.kernel_res, "gw.err.no.target",
754 "No connection established - "
759 ccl_token_and = gw_res_get (info.kernel_res, "ccl.token.and", "and");
760 ccl_token_or = gw_res_get (info.kernel_res, "ccl.token.or", "or");
761 ccl_token_not = gw_res_get (info.kernel_res, "ccl.token.not", "not");
762 ccl_token_set = gw_res_get (info.kernel_res, "ccl.token.set", "set");
767 return exec_find (cmd->next, str);
769 return exec_show (cmd->next);
771 return exec_base (cmd->next);
773 return exec_help (cmd->next);
775 return exec_status (cmd->next);
777 return exec_target (cmd->next);
779 return exec_account (cmd->next);
781 fprintf (reply_fd, "%s\n",
782 gw_res_get (info.kernel_res, "gw.err.unimplemented",
783 "Not implemented yet"));
788 fprintf (reply_fd, "\n> %s\n", str);
789 fprintf (reply_fd, " ^ %s\n",
790 gw_res_get (info.kernel_res, "gw.err.unknown.command",
792 "Use help to see list of commands"));
797 int urp_start (int continuation, struct str_queue *queue)
799 char subject_str[128];
802 info.reply_fname = NULL;
804 if (email_header (queue, info.from_str, subject_str))
806 gw_log (GW_LOG_WARN, KERNEL_LOG, "No message body");
809 tty_init (stdout, 40, 70);
812 info.reply_fname = tempnam (gw_res_get (info.kernel_res,
813 "gw.reply.tmp.dir", NULL),
814 gw_res_get (info.kernel_res,
815 "gw.reply.tmp.prefix", "gwr"));
817 reply_fd = fopen (info.reply_fname, "w");
820 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, KERNEL_LOG, "Cannot create %s",
824 tty_init (reply_fd, 0, 0);
825 fprintf (reply_fd, "From: %s\n",
826 gw_res_get (info.kernel_res, "gw.msg.from","Email-gateway"));
827 fprintf (reply_fd, "Subject: ");
829 fprintf (reply_fd, "Z39.50 Re: %s", subject_str);
831 fprintf (reply_fd, "%s\n", gw_res_get (info.kernel_res,
834 fprintf (reply_fd, "\n");
835 gw_log (GW_LOG_ACCT, KERNEL_LOG, "User start %s", info.from_str);
838 gw_log (GW_LOG_WARN, KERNEL_LOG, "No From in email header");
839 fprintf (reply_fd, "%s\n", gw_res_get (info.kernel_res, "gw.msg.greeting",
840 "Email->Z39.50 gateway"));
842 fprintf (reply_fd, "%s\n", gw_res_get (info.kernel_res,
848 int urp_command (struct str_queue *queue)
852 while (str_queue_deq (queue, line_buf, LINE_MAX))
854 if (line_buf[0] == '\n')
857 while (str_queue_deq (queue, 0, 0))
863 if ((cp = strchr (line_buf, '\n')))
865 gw_log (GW_LOG_ACCT, KERNEL_LOG, "cmd: %s", line_buf);
866 if (isalpha (line_buf[0]))
867 exec_command (line_buf);
875 if (!info.command_no)
877 fprintf (reply_fd, "%s\n",
878 gw_res_get (info.kernel_res, "gw.err.nullbody", "No body"));
887 assert (info.reply_fname);
891 mta = gw_res_get (info.kernel_res, "gw.reply.mta",
892 "/usr/lib/sendmail");
893 sprintf (cmd, "%s %s < %s", mta, info.from_str, info.reply_fname);
895 mta_code = system (cmd);
897 gw_log (GW_LOG_FATAL, KERNEL_LOG,
898 "Reply '%s' got exit code %d", cmd, mta_code);
900 unlink (info.reply_fname);
901 gw_log (GW_LOG_ACCT, KERNEL_LOG, "User end %s", info.from_str);