3 * Deal with incremental updates
5 * Copyright (C) 1989-1998 by the Massachusetts Institute of Technology
6 * For copying and distribution information, please see the file
10 #include <mit-copyright.h>
11 #include "mr_server.h"
21 EXEC SQL INCLUDE sqlca;
26 extern char *table_name[];
27 extern int num_tables;
35 EXEC SQL WHENEVER SQLERROR DO dbmserr();
37 /* structures to save before args */
38 static char *before[MAXARGC];
40 static enum tables beforetable;
42 /* structures to save after args */
43 static char *after[MAXARGC];
46 /* structures to save entire sets of incremental changes */
47 struct save_queue *incremental_sq = NULL;
48 struct save_queue *incremental_exec = NULL;
58 void next_incremental(void);
59 char **copy_argv(char **argv, int argc);
60 void free_argv(char **argv, int argc);
61 int table_num(char *table);
63 void incremental_init(void)
68 incremental_sq = sq_create();
69 if (!incremental_exec)
70 incremental_exec = sq_create();
72 for (i = 0; i < MAXARGC; i++)
74 before[i] = xmalloc(MAX_FIELD_WIDTH);
75 after[i] = xmalloc(MAX_FIELD_WIDTH);
80 /* record the state of a table row before it is changed */
82 void incremental_before(enum tables table, char *qual, char **argv)
84 EXEC SQL BEGIN DECLARE SECTION;
86 EXEC SQL END DECLARE SECTION;
95 sprintf(stmt_buf, "SELECT u.login, u.unix_uid, u.shell, "
96 "u.winconsoleshell, u.last, u.first, u.middle, u.status, "
97 "u.clearid, u.type, u.users_id FROM users u WHERE %s", qual);
102 sprintf(stmt_buf, "SELECT m.name, m.vendor, m.mach_id FROM machine m "
108 sprintf(stmt_buf, "SELECT c.name, c.description, c.location, "
109 "c.clu_id FROM clusters c WHERE %s", qual);
113 case CONTAINERS_TABLE:
114 sprintf(stmt_buf, "SELECT c.name, c.description, c.location, c.contact, "
115 "c.acl_type, c.acl_id, c.cnt_id FROM containers c WHERE %s",
120 id = atoi(before[5]);
121 if (!strncmp(before[4], "USER", 4))
123 id_to_name(id, USERS_TABLE, &name);
124 strcpy(before[5], name);
126 else if (!strncmp(before[4], "LIST", 4))
128 id_to_name(id, LIST_TABLE, &name);
129 strcpy(before[5], name);
131 else if (!strncmp(before[4], "KERBEROS", 8))
133 id_to_name(id, STRINGS_TABLE, &name);
134 strcpy(before[5], name);
138 strcpy(before[0], argv[0]);
139 strcpy(before[1], argv[1]);
143 strcpy(before[0], argv[0]);
144 strcpy(before[1], argv[1]);
145 strcpy(before[2], argv[2]);
149 sprintf(stmt_buf, "SELECT fs.label, fs.type, fs.mach_id, fs.name, "
150 "fs.mount, fs.rwaccess, fs.comments, fs.owner, fs.owners, "
151 "fs.createflg, fs.lockertype, fs.filsys_id FROM filesys fs "
155 id = atoi(before[2]);
156 id_to_name(id, MACHINE_TABLE, &name);
157 strcpy(before[2], name);
158 id = atoi(before[7]);
159 id_to_name(id, USERS_TABLE, &name);
160 strcpy(before[7], name);
161 id = atoi(before[8]);
162 id_to_name(id, LIST_TABLE, &name);
163 strcpy(before[8], name);
168 strcpy(before[0], "?");
169 strcpy(before[1], argv[1]);
170 strcpy(before[2], "?");
171 sprintf(stmt_buf, "SELECT q.quota, fs.name FROM quota q, filesys fs "
172 "WHERE %s AND fs.filsys_id = q.filsys_id", qual);
174 strcpy(before[2], argv[1]);
178 sprintf(stmt_buf, "SELECT l.name, l.active, l.publicflg, l.hidden, "
179 "l.maillist, l.grouplist, l.gid, l.acl_type, l.acl_id, "
180 "l.description, l.list_id FROM list l WHERE %s", qual);
186 sprintf(stmt_buf, "SELECT active, publicflg, hidden, maillist, "
187 "grouplist, gid FROM list WHERE list_id = %d", id);
190 id_to_name(id, LIST_TABLE, &name);
192 strcpy(before[0], name);
193 strcpy(before[1], argv[1]);
196 if (!strcmp(before[1], "USER"))
198 id_to_name(id, USERS_TABLE, &name2);
199 EXEC SQL SELECT status, users_id INTO :before[9], :before[11]
200 FROM users WHERE users_id = :id;
201 EXEC SQL SELECT list_id INTO :before[10] FROM list
205 else if (!strcmp(before[1], "LIST"))
207 id_to_name(id, LIST_TABLE, &name2);
208 EXEC SQL SELECT list_id INTO :before[9] FROM list
210 sprintf(before[10], "%d", id);
213 else if (!strcmp(before[1], "STRING") || !strcmp(before[1], "KERBEROS"))
215 id_to_name(id, STRINGS_TABLE, &name2);
216 EXEC SQL SELECT list_id INTO :before[9] FROM list
219 else if (!strcmp(before[1], "MACHINE"))
221 id_to_name(id, MACHINE_TABLE, &name2);
222 EXEC SQL SELECT mach_id INTO :before[9] FROM machine
225 strcpy(before[2], name2);
231 com_err(whoami, 0, "requested incremental on unexpected table `%s'",
239 void incremental_clear_before(void)
245 /* add an element to the incremental queue for the changed row */
247 void incremental_after(enum tables table, char *qual, char **argv)
250 EXEC SQL BEGIN DECLARE SECTION;
252 EXEC SQL END DECLARE SECTION;
258 sprintf(stmt_buf, "SELECT u.login, u.unix_uid, u.shell, "
259 "u.winconsoleshell, u.last, u.first, u.middle, u.status, "
260 "u.clearid, u.type, u.users_id FROM users u WHERE %s", qual);
265 sprintf(stmt_buf, "SELECT m.name, m.vendor, m.mach_id FROM machine m "
271 sprintf(stmt_buf, "SELECT c.name, c.description, c.location, "
272 "c.clu_id FROM clusters c WHERE %s", qual);
276 case CONTAINERS_TABLE:
277 sprintf(stmt_buf, "SELECT c.name, c.description, c.location, c.contact, "
278 "c.acl_type, c.acl_id, c.cnt_id FROM containers c WHERE %s",
284 if (!strncmp(after[4], "USER", 4))
286 id_to_name(id, USERS_TABLE, &name);
287 strcpy(after[5], name);
289 else if (!strncmp(after[4], "LIST", 4))
291 id_to_name(id, LIST_TABLE, &name);
292 strcpy(after[5], name);
294 else if (!strncmp(after[4], "KERBEROS", 8))
296 id_to_name(id, STRINGS_TABLE, &name);
297 strcpy(after[5], name);
301 strcpy(after[0], argv[0]);
302 strcpy(after[1], argv[1]);
306 strcpy(after[0], argv[0]);
307 strcpy(after[1], argv[1]);
308 strcpy(after[2], argv[2]);
312 sprintf(stmt_buf, "SELECT fs.label, fs.type, fs.mach_id, fs.name, "
313 "fs.mount, fs.rwaccess, fs.comments, fs.owner, fs.owners, "
314 "fs.createflg, fs.lockertype, fs.filsys_id FROM filesys fs "
319 id_to_name(id, MACHINE_TABLE, &name);
320 strcpy(after[2], name);
322 id_to_name(id, USERS_TABLE, &name);
323 strcpy(after[7], name);
325 id_to_name(id, LIST_TABLE, &name);
326 strcpy(after[8], name);
331 strcpy(after[0], "?");
332 strcpy(after[1], argv[1]);
333 strcpy(after[2], "?");
334 sprintf(stmt_buf, "SELECT q.quota, fs.name FROM quota q, filesys fs "
335 "WHERE %s and fs.filsys_id = q.filsys_id and q.type = '%s'",
341 sprintf(stmt_buf, "SELECT l.name, l.active, l.publicflg, l.hidden, "
342 "l.maillist, l.grouplist, l.gid, l.acl_type, l.acl_id, "
343 "l.description, l.list_id FROM list l WHERE %s", qual);
349 sprintf(stmt_buf, "SELECT active, publicflg, hidden, maillist, "
350 "grouplist, gid FROM list WHERE list_id = %d", id);
353 id_to_name(id, LIST_TABLE, &name);
355 strcpy(after[0], name);
356 strcpy(after[1], argv[1]);
359 if (!strcmp(after[1], "USER"))
361 id_to_name(id, USERS_TABLE, &name2);
362 EXEC SQL SELECT status, users_id INTO :after[9], :after[11]
363 FROM users WHERE users_id = :id;
364 EXEC SQL SELECT list_id INTO :after[10] FROM list
368 else if (!strcmp(after[1], "LIST"))
370 id_to_name(id, LIST_TABLE, &name2);
371 EXEC SQL SELECT list_id INTO :after[9] FROM list
373 sprintf(after[10], "%d", id);
376 else if (!strcmp(after[1], "STRING") || !strcmp(after[1], "KERBEROS"))
378 id_to_name(id, STRINGS_TABLE, &name2);
379 EXEC SQL SELECT list_id INTO :after[9] FROM list
382 else if (!strcmp(after[1], "MACHINE"))
384 id_to_name(id, MACHINE_TABLE, &name2);
385 EXEC SQL SELECT mach_id INTO :after[9] FROM machine
388 strcpy(after[2], name2);
398 com_err(whoami, 0, "requested incremental on unexpected table `%s'",
404 iu = xmalloc(sizeof(struct iupdate));
405 iu->table = table_name[table];
406 iu->beforec = beforec;
407 iu->before = copy_argv(before, beforec);
409 iu->after = copy_argv(after, afterc);
410 sq_save_data(incremental_sq, iu);
413 void incremental_clear_after(void)
415 incremental_after(NO_TABLE, NULL, NULL);
419 /* Called when the current transaction is committed to start any queued
420 * incremental updates. This caches the update table the first time it
425 struct inc_cache *next;
426 char *table, *service;
430 void incremental_update(void)
432 static int inited = 0;
433 static struct inc_cache *cache;
435 EXEC SQL BEGIN DECLARE SECTION;
436 char tab[INCREMENTAL_TABLE_NAME_SIZE], serv[INCREMENTAL_SERVICE_SIZE];
437 EXEC SQL END DECLARE SECTION;
438 struct iupdate *iu, *iu_save;
444 EXEC SQL DECLARE inc CURSOR FOR SELECT table_name, service
449 EXEC SQL FETCH inc INTO :tab, :serv;
452 c = xmalloc(sizeof(struct inc_cache));
454 c->table = xstrdup(strtrim(tab));
455 c->service = xstrdup(strtrim(serv));
459 EXEC SQL COMMIT WORK;
462 while (sq_remove_data(incremental_sq, &iu))
464 for (c = cache; c; c = c->next)
466 if (!strcmp(c->table, iu->table))
468 iu->service = c->service;
469 iu_save = xmalloc(sizeof(struct iupdate));
470 iu_save->service = iu->service;
471 iu_save->table = iu->table;
472 iu_save->beforec = iu->beforec;
473 iu_save->afterc = iu->afterc;
474 iu_save->before = copy_argv(iu->before, iu->beforec);
475 iu_save->after = copy_argv(iu->after, iu->afterc);
476 sq_save_data(incremental_exec, iu_save);
481 free_argv(iu->before, iu->beforec);
482 free_argv(iu->after, iu->afterc);
486 if (inc_running == 0)
490 /* Pro*C 2.2.4 can't cope with the sigset_t below, at least in Solaris 2.6.
491 We add DEFINE=_PROC_ to the proc invocation and then #ifndef that around
492 this function so proc will pass it through without reading it. */
495 void next_incremental(void)
498 char *argv[MAXARGC * 2 + 4], cafter[3], cbefore[3], prog[MAXPATHLEN];
502 if (!incremental_exec)
505 if (sq_empty(incremental_exec) ||
506 (inc_running && now - inc_started < INC_TIMEOUT))
510 com_err(whoami, 0, "incremental timeout on pid %d", inc_pid);
512 sq_remove_data(incremental_exec, &iu);
514 sprintf(cbefore, "%d", iu->beforec);
516 sprintf(cafter, "%d", iu->afterc);
518 for (i = 0; i < iu->beforec; i++)
519 argv[4 + i] = iu->before[i];
520 for (i = 0; i < iu->afterc; i++)
521 argv[4 + iu->beforec + i] = iu->after[i];
523 sprintf(prog, "%s/%s.incr", BIN_DIR, iu->service);
525 argv[4 + iu->beforec + iu->afterc] = 0;
528 sigaddset(&sigs, SIGCHLD);
529 sigprocmask(SIG_BLOCK, &sigs, NULL);
537 com_err(whoami, 0, "Failed to start incremental update");
543 sigprocmask(SIG_UNBLOCK, &sigs, NULL);
545 free_argv(iu->before, iu->beforec);
546 free_argv(iu->after, iu->afterc);
551 /* Called when the current transaction is aborted to throw away any queued
552 * incremental updates
555 void incremental_flush(void)
559 while (sq_get_data(incremental_sq, &iu))
561 free_argv(iu->before, iu->beforec);
562 free_argv(iu->after, iu->afterc);
565 sq_destroy(incremental_sq);
566 incremental_sq = sq_create();
570 char **copy_argv(char **argv, int argc)
572 char **ret = xmalloc(sizeof(char *) * argc);
574 ret[argc] = xstrdup(strtrim(argv[argc]));
578 void free_argv(char **argv, int argc)
585 int table_num(char *name)
589 for (i = num_tables - 1; i; i--)
591 if (!strcmp(table_name[i], name))
595 return i; /* 0 = "none" if no match */