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Commit | Line | Data |
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7ac48069 | 1 | /* $Id$ |
32cfe906 | 2 | * |
7ac48069 | 3 | * Deal with incremental updates |
5eaef520 | 4 | * |
7ac48069 | 5 | * Copyright (C) 1989-1998 by the Massachusetts Institute of Technology |
6 | * For copying and distribution information, please see the file | |
7 | * <mit-copyright.h>. | |
32cfe906 | 8 | */ |
9 | ||
32cfe906 | 10 | #include <mit-copyright.h> |
32cfe906 | 11 | #include "mr_server.h" |
03c05291 | 12 | #include "query.h" |
13 | #include "qrtn.h" | |
7ac48069 | 14 | |
15 | #include <signal.h> | |
85330553 | 16 | #include <stdio.h> |
7ac48069 | 17 | #include <stdlib.h> |
18 | #include <string.h> | |
19 | #include <unistd.h> | |
20 | ||
45bf7573 | 21 | EXEC SQL INCLUDE sqlca; |
32cfe906 | 22 | |
7ac48069 | 23 | RCSID("$Header$"); |
24 | ||
32cfe906 | 25 | extern char *whoami; |
03c05291 | 26 | extern char *table_name[]; |
27 | extern int num_tables; | |
32cfe906 | 28 | |
29 | int inc_pid = 0; | |
30 | int inc_running = 0; | |
31 | time_t inc_started; | |
32 | ||
33 | #define MAXARGC 15 | |
34 | ||
03c05291 | 35 | EXEC SQL WHENEVER SQLERROR DO dbmserr(); |
45bf7573 | 36 | |
32cfe906 | 37 | /* structures to save before args */ |
32cfe906 | 38 | static char *before[MAXARGC]; |
32cfe906 | 39 | static int beforec; |
03c05291 | 40 | static enum tables beforetable; |
32cfe906 | 41 | |
42 | /* structures to save after args */ | |
32cfe906 | 43 | static char *after[MAXARGC]; |
32cfe906 | 44 | static int afterc; |
45 | ||
46 | /* structures to save entire sets of incremental changes */ | |
47 | struct save_queue *incremental_sq = NULL; | |
48 | struct save_queue *incremental_exec = NULL; | |
49 | struct iupdate { | |
5eaef520 | 50 | char *table; |
51 | int beforec; | |
52 | char **before; | |
53 | int afterc; | |
54 | char **after; | |
55 | char *service; | |
32cfe906 | 56 | }; |
57 | ||
03c05291 | 58 | void next_incremental(void); |
fc053494 | 59 | char **copy_argv(char **argv, int argc); |
03c05291 | 60 | void free_argv(char **argv, int argc); |
61 | int table_num(char *table); | |
32cfe906 | 62 | |
03c05291 | 63 | void incremental_init(void) |
32cfe906 | 64 | { |
5eaef520 | 65 | int i; |
32cfe906 | 66 | |
5eaef520 | 67 | if (!incremental_sq) |
68 | incremental_sq = sq_create(); | |
69 | if (!incremental_exec) | |
70 | incremental_exec = sq_create(); | |
03c05291 | 71 | |
5eaef520 | 72 | for (i = 0; i < MAXARGC; i++) |
73 | { | |
e688520a | 74 | before[i] = xmalloc(MAX_FIELD_WIDTH); |
75 | after[i] = xmalloc(MAX_FIELD_WIDTH); | |
03c05291 | 76 | } |
32cfe906 | 77 | } |
78 | ||
79 | ||
03c05291 | 80 | /* record the state of a table row before it is changed */ |
81 | ||
5eaef520 | 82 | void incremental_before(enum tables table, char *qual, char **argv) |
32cfe906 | 83 | { |
5eaef520 | 84 | EXEC SQL BEGIN DECLARE SECTION; |
85 | int id; | |
86 | EXEC SQL END DECLARE SECTION; | |
87 | ||
88 | char *name; | |
89 | ||
90 | beforetable = table; | |
91 | ||
92 | switch (table) | |
93 | { | |
94 | case USERS_TABLE: | |
95 | sprintf(stmt_buf, "SELECT u.login, u.unix_uid, u.shell, u.last, " | |
96 | "u.first, u.middle, u.status, u.clearid, u.type " | |
97 | "FROM users u WHERE %s", qual); | |
98 | dosql(before); | |
99 | beforec = 9; | |
100 | break; | |
101 | case MACHINE_TABLE: | |
102 | sprintf(stmt_buf, "SELECT m.name, m.vendor FROM machine m " | |
103 | "WHERE %s", qual); | |
104 | dosql(before); | |
105 | beforec = 2; | |
106 | break; | |
e688520a | 107 | case CLUSTERS_TABLE: |
5eaef520 | 108 | sprintf(stmt_buf, "SELECT c.name, c.description, c.location " |
109 | "FROM clusters c WHERE %s", qual); | |
110 | dosql(before); | |
111 | beforec = 3; | |
112 | break; | |
113 | case MCMAP_TABLE: | |
114 | strcpy(before[0], argv[0]); | |
115 | strcpy(before[1], argv[1]); | |
116 | beforec = 2; | |
117 | break; | |
118 | case SVC_TABLE: | |
119 | strcpy(before[0], argv[0]); | |
120 | strcpy(before[1], argv[1]); | |
121 | strcpy(before[2], argv[2]); | |
122 | beforec = 3; | |
123 | break; | |
124 | case FILESYS_TABLE: | |
125 | sprintf(stmt_buf, "SELECT fs.label, fs.type, fs.mach_id, fs.name, " | |
126 | "fs.mount, fs.rwaccess, fs.comments, fs.owner, fs.owners, " | |
127 | "fs.createflg, fs.lockertype FROM filesys fs WHERE %s", qual); | |
128 | dosql(before); | |
129 | name = malloc(0); | |
130 | id = atoi(before[2]); | |
131 | id_to_name(id, MACHINE_TABLE, &name); | |
132 | strcpy(before[2], name); | |
133 | id = atoi(before[7]); | |
134 | id_to_name(id, USERS_TABLE, &name); | |
135 | strcpy(before[7], name); | |
136 | id = atoi(before[8]); | |
137 | id_to_name(id, LIST_TABLE, &name); | |
138 | strcpy(before[8], name); | |
139 | free(name); | |
140 | beforec = 11; | |
141 | break; | |
142 | case QUOTA_TABLE: | |
143 | strcpy(before[0], "?"); | |
144 | strcpy(before[1], argv[1]); | |
145 | strcpy(before[2], "?"); | |
146 | sprintf(stmt_buf, "SELECT q.quota, fs.name FROM quota q, filesys fs " | |
147 | "WHERE %s AND fs.filsys_id = q.filsys_id", qual); | |
148 | dosql(&(before[3])); | |
149 | strcpy(before[2], argv[1]); | |
150 | beforec = 5; | |
151 | break; | |
152 | case LIST_TABLE: | |
153 | sprintf(stmt_buf, "SELECT l.name, l.active, l.publicflg, l.hidden, " | |
154 | "l.maillist, l.grouplist, l.gid, l.acl_type, l.acl_id, " | |
155 | "l.description FROM list l WHERE %s", qual); | |
156 | dosql(before); | |
157 | beforec = 10; | |
158 | break; | |
159 | case IMEMBERS_TABLE: | |
160 | id = (int) argv[0]; | |
161 | sprintf(stmt_buf, "SELECT active, publicflg, hidden, maillist, " | |
162 | "grouplist, gid FROM list WHERE list_id = %d", id); | |
163 | dosql(&(before[3])); | |
164 | name = malloc(0); | |
165 | id_to_name(id, LIST_TABLE, &name); | |
166 | strcpy(before[0], name); | |
167 | strcpy(before[1], argv[1]); | |
168 | id = (int) argv[2]; | |
169 | beforec = 9; | |
170 | if (!strcmp(before[1], "USER")) | |
171 | { | |
172 | id_to_name(id, USERS_TABLE, &name); | |
173 | EXEC SQL SELECT status INTO :before[9] FROM users | |
174 | WHERE users_id = :id; | |
175 | beforec = 10; | |
176 | } | |
177 | else if (!strcmp(before[1], "LIST")) | |
03c05291 | 178 | id_to_name(id, LIST_TABLE, &name); |
5eaef520 | 179 | else if (!strcmp(before[1], "STRING") || !strcmp(before[1], "KERBEROS")) |
180 | id_to_name(id, STRINGS_TABLE, &name); | |
181 | strcpy(before[2], name); | |
182 | free(name); | |
183 | break; | |
184 | default: | |
03c05291 | 185 | /* |
186 | com_err(whoami, 0, "requested incremental on unexpected table `%s'", | |
187 | table_name[table]); | |
188 | */ | |
5eaef520 | 189 | break; |
190 | } | |
a313cad2 | 191 | } |
32cfe906 | 192 | |
193 | ||
03c05291 | 194 | void incremental_clear_before(void) |
32cfe906 | 195 | { |
5eaef520 | 196 | beforec = 0; |
32cfe906 | 197 | } |
198 | ||
32cfe906 | 199 | |
03c05291 | 200 | /* add an element to the incremental queue for the changed row */ |
32cfe906 | 201 | |
5eaef520 | 202 | void incremental_after(enum tables table, char *qual, char **argv) |
a313cad2 | 203 | { |
5eaef520 | 204 | char *name; |
205 | EXEC SQL BEGIN DECLARE SECTION; | |
206 | int id; | |
207 | EXEC SQL END DECLARE SECTION; | |
208 | struct iupdate *iu; | |
209 | ||
210 | switch (table) | |
211 | { | |
212 | case USERS_TABLE: | |
213 | sprintf(stmt_buf, "SELECT u.login, u.unix_uid, u.shell, u.last, " | |
214 | "u.first, u.middle, u.status, u.clearid, u.type " | |
215 | "FROM users u WHERE %s", qual); | |
216 | dosql(after); | |
217 | afterc = 9; | |
218 | break; | |
219 | case MACHINE_TABLE: | |
220 | sprintf(stmt_buf, "SELECT m.name, m.vendor FROM machine m " | |
221 | "WHERE %s", qual); | |
222 | dosql(after); | |
223 | afterc = 2; | |
224 | break; | |
e688520a | 225 | case CLUSTERS_TABLE: |
5eaef520 | 226 | sprintf(stmt_buf, "SELECT c.name, c.description, c.location " |
227 | "FROM clusters c WHERE %s", qual); | |
228 | dosql(after); | |
229 | afterc = 3; | |
230 | break; | |
231 | case MCMAP_TABLE: | |
232 | strcpy(after[0], argv[0]); | |
233 | strcpy(after[1], argv[1]); | |
234 | afterc = 2; | |
235 | break; | |
236 | case SVC_TABLE: | |
237 | strcpy(after[0], argv[0]); | |
238 | strcpy(after[1], argv[1]); | |
239 | strcpy(after[2], argv[2]); | |
240 | afterc = 3; | |
241 | break; | |
242 | case FILESYS_TABLE: | |
243 | sprintf(stmt_buf, "SELECT fs.label, fs.type, fs.mach_id, fs.name, " | |
244 | "fs.mount, fs.rwaccess, fs.comments, fs.owner, fs.owners, " | |
245 | "fs.createflg, fs.lockertype FROM filesys fs WHERE %s", qual); | |
246 | dosql(after); | |
247 | name = malloc(0); | |
248 | id = atoi(after[2]); | |
249 | id_to_name(id, MACHINE_TABLE, &name); | |
250 | strcpy(after[2], name); | |
251 | id = atoi(after[7]); | |
252 | id_to_name(id, USERS_TABLE, &name); | |
253 | strcpy(after[7], name); | |
254 | id = atoi(after[8]); | |
255 | id_to_name(id, LIST_TABLE, &name); | |
256 | strcpy(after[8], name); | |
257 | free(name); | |
258 | afterc = 11; | |
259 | break; | |
260 | case QUOTA_TABLE: | |
261 | strcpy(after[0], "?"); | |
262 | strcpy(after[1], argv[1]); | |
263 | strcpy(after[2], "?"); | |
264 | sprintf(stmt_buf, "SELECT q.quota, fs.name FROM quota q, filesys fs " | |
265 | "WHERE %s and fs.filsys_id = q.filsys_id and q.type = '%s'", | |
266 | qual, argv[1]); | |
267 | dosql(&(after[3])); | |
268 | afterc = 5; | |
269 | break; | |
270 | case LIST_TABLE: | |
271 | sprintf(stmt_buf, "SELECT l.name, l.active, l.publicflg, l.hidden, " | |
272 | "l.maillist, l.grouplist, l.gid, l.acl_type, l.acl_id, " | |
273 | "l.description FROM list l WHERE %s", qual); | |
274 | dosql(after); | |
275 | afterc = 10; | |
276 | break; | |
277 | case IMEMBERS_TABLE: | |
278 | id = (int) argv[0]; | |
279 | sprintf(stmt_buf, "SELECT active, publicflg, hidden, maillist, " | |
280 | "grouplist, gid FROM list WHERE list_id = %d", id); | |
281 | dosql(&(after[3])); | |
282 | name = malloc(0); | |
283 | id_to_name(id, LIST_TABLE, &name); | |
284 | strcpy(after[0], name); | |
285 | strcpy(after[1], argv[1]); | |
286 | id = (int) argv[2]; | |
287 | afterc = 9; | |
288 | if (!strcmp(after[1], "USER")) | |
289 | { | |
290 | id_to_name(id, USERS_TABLE, &name); | |
291 | EXEC SQL SELECT status INTO :after[9] FROM users | |
292 | WHERE users_id = :id; | |
293 | afterc = 10; | |
32cfe906 | 294 | } |
5eaef520 | 295 | else if (!strcmp(after[1], "LIST")) |
296 | id_to_name(id, LIST_TABLE, &name); | |
297 | else if (!strcmp(after[1], "STRING") || !strcmp(after[1], "KERBEROS")) | |
298 | id_to_name(id, STRINGS_TABLE, &name); | |
299 | strcpy(after[2], name); | |
300 | free(name); | |
301 | break; | |
302 | case NO_TABLE: | |
303 | afterc = 0; | |
304 | table = beforetable; | |
305 | break; | |
306 | default: | |
03c05291 | 307 | /* |
308 | com_err(whoami, 0, "requested incremental on unexpected table `%s'", | |
309 | table_name[table]); | |
310 | */ | |
5eaef520 | 311 | break; |
32cfe906 | 312 | } |
5eaef520 | 313 | |
e688520a | 314 | iu = xmalloc(sizeof(struct iupdate)); |
5eaef520 | 315 | iu->table = table_name[table]; |
316 | iu->beforec = beforec; | |
fc053494 | 317 | iu->before = copy_argv(before, beforec); |
5eaef520 | 318 | iu->afterc = afterc; |
fc053494 | 319 | iu->after = copy_argv(after, afterc); |
5eaef520 | 320 | sq_save_data(incremental_sq, iu); |
a313cad2 | 321 | } |
32cfe906 | 322 | |
03c05291 | 323 | void incremental_clear_after(void) |
324 | { | |
5eaef520 | 325 | incremental_after(NO_TABLE, NULL, NULL); |
03c05291 | 326 | } |
327 | ||
32cfe906 | 328 | |
329 | /* Called when the current transaction is committed to start any queued | |
330 | * incremental updates. This caches the update table the first time it | |
331 | * is called. | |
332 | */ | |
333 | ||
334 | struct inc_cache { | |
5eaef520 | 335 | struct inc_cache *next; |
336 | char *table, *service; | |
32cfe906 | 337 | }; |
338 | ||
339 | ||
03c05291 | 340 | void incremental_update(void) |
32cfe906 | 341 | { |
5eaef520 | 342 | static int inited = 0; |
343 | static struct inc_cache *cache; | |
344 | struct inc_cache *c; | |
345 | EXEC SQL BEGIN DECLARE SECTION; | |
e688520a | 346 | char tab[INCREMENTAL_TABLE_NAME_SIZE], serv[INCREMENTAL_SERVICE_SIZE]; |
5eaef520 | 347 | EXEC SQL END DECLARE SECTION; |
772c26b3 | 348 | struct iupdate *iu, *iu_save; |
5eaef520 | 349 | |
350 | if (!inited) | |
351 | { | |
352 | inited++; | |
353 | ||
354 | EXEC SQL DECLARE inc CURSOR FOR SELECT table_name, service | |
355 | FROM incremental; | |
356 | EXEC SQL OPEN inc; | |
357 | while (1) | |
358 | { | |
359 | EXEC SQL FETCH inc INTO :tab, :serv; | |
360 | if (sqlca.sqlcode) | |
361 | break; | |
e688520a | 362 | c = xmalloc(sizeof(struct inc_cache)); |
5eaef520 | 363 | c->next = cache; |
e688520a | 364 | c->table = xstrdup(strtrim(tab)); |
365 | c->service = xstrdup(strtrim(serv)); | |
5eaef520 | 366 | cache = c; |
32cfe906 | 367 | } |
5eaef520 | 368 | EXEC SQL CLOSE inc; |
369 | EXEC SQL COMMIT WORK; | |
32cfe906 | 370 | } |
371 | ||
5eaef520 | 372 | while (sq_remove_data(incremental_sq, &iu)) |
373 | { | |
374 | for (c = cache; c; c = c->next) | |
375 | { | |
376 | if (!strcmp(c->table, iu->table)) | |
377 | { | |
378 | iu->service = c->service; | |
772c26b3 | 379 | iu_save = xmalloc(sizeof(struct iupdate)); |
380 | iu_save->service = iu->service; | |
381 | iu_save->table = iu->table; | |
382 | iu_save->beforec = iu->beforec; | |
383 | iu_save->afterc = iu->afterc; | |
384 | iu_save->before = copy_argv(iu->before, iu->beforec); | |
385 | iu_save->after = copy_argv(iu->after, iu->afterc); | |
386 | sq_save_data(incremental_exec, iu_save); | |
32cfe906 | 387 | } |
388 | } | |
e688520a | 389 | if (!c) |
390 | { | |
391 | free_argv(iu->before, iu->beforec); | |
392 | free_argv(iu->after, iu->afterc); | |
393 | free(iu); | |
394 | } | |
32cfe906 | 395 | } |
5eaef520 | 396 | if (inc_running == 0) |
397 | next_incremental(); | |
32cfe906 | 398 | } |
399 | ||
f18a32ee | 400 | /* Pro*C 2.2.4 can't cope with the sigset_t below, at least in Solaris 2.6. |
401 | We add DEFINE=_PROC_ to the proc invocation and then #ifndef that around | |
402 | this function so proc will pass it through without reading it. */ | |
32cfe906 | 403 | |
f18a32ee | 404 | #ifndef _PROC_ |
03c05291 | 405 | void next_incremental(void) |
32cfe906 | 406 | { |
5eaef520 | 407 | struct iupdate *iu; |
e688520a | 408 | char *argv[MAXARGC * 2 + 4], cafter[3], cbefore[3], prog[MAXPATHLEN]; |
5eaef520 | 409 | int i; |
410 | sigset_t sigs; | |
411 | ||
412 | if (!incremental_exec) | |
413 | incremental_init(); | |
414 | ||
415 | if (sq_empty(incremental_exec) || | |
416 | (inc_running && now - inc_started < INC_TIMEOUT)) | |
417 | return; | |
418 | ||
419 | if (inc_running) | |
420 | com_err(whoami, 0, "incremental timeout on pid %d", inc_pid); | |
421 | ||
422 | sq_remove_data(incremental_exec, &iu); | |
423 | argv[1] = iu->table; | |
424 | sprintf(cbefore, "%d", iu->beforec); | |
425 | argv[2] = cbefore; | |
426 | sprintf(cafter, "%d", iu->afterc); | |
427 | argv[3] = cafter; | |
428 | for (i = 0; i < iu->beforec; i++) | |
429 | argv[4 + i] = iu->before[i]; | |
430 | for (i = 0; i < iu->afterc; i++) | |
431 | argv[4 + iu->beforec + i] = iu->after[i]; | |
432 | ||
433 | sprintf(prog, "%s/%s.incr", BIN_DIR, iu->service); | |
434 | argv[0] = prog; | |
435 | argv[4 + iu->beforec + iu->afterc] = 0; | |
436 | ||
437 | sigemptyset(&sigs); | |
438 | sigaddset(&sigs, SIGCHLD); | |
439 | sigprocmask(SIG_BLOCK, &sigs, NULL); | |
440 | inc_pid = vfork(); | |
441 | switch (inc_pid) | |
442 | { | |
32cfe906 | 443 | case 0: |
5eaef520 | 444 | execv(prog, argv); |
445 | _exit(1); | |
32cfe906 | 446 | case -1: |
5eaef520 | 447 | com_err(whoami, 0, "Failed to start incremental update"); |
448 | break; | |
32cfe906 | 449 | default: |
5eaef520 | 450 | inc_running = 1; |
451 | inc_started = now; | |
32cfe906 | 452 | } |
5eaef520 | 453 | sigprocmask(SIG_UNBLOCK, &sigs, NULL); |
32cfe906 | 454 | |
5eaef520 | 455 | free_argv(iu->before, iu->beforec); |
456 | free_argv(iu->after, iu->afterc); | |
457 | free(iu); | |
32cfe906 | 458 | } |
f18a32ee | 459 | #endif |
32cfe906 | 460 | |
461 | /* Called when the current transaction is aborted to throw away any queued | |
462 | * incremental updates | |
463 | */ | |
464 | ||
03c05291 | 465 | void incremental_flush(void) |
32cfe906 | 466 | { |
5eaef520 | 467 | struct iupdate *iu; |
32cfe906 | 468 | |
5eaef520 | 469 | while (sq_get_data(incremental_sq, &iu)) |
470 | { | |
471 | free_argv(iu->before, iu->beforec); | |
472 | free_argv(iu->after, iu->afterc); | |
473 | free(iu); | |
32cfe906 | 474 | } |
5eaef520 | 475 | sq_destroy(incremental_sq); |
476 | incremental_sq = sq_create(); | |
32cfe906 | 477 | } |
478 | ||
479 | ||
fc053494 | 480 | char **copy_argv(char **argv, int argc) |
481 | { | |
482 | char **ret = xmalloc(sizeof(char *) * argc); | |
483 | while (--argc >= 0) | |
484 | ret[argc] = xstrdup(strtrim(argv[argc])); | |
485 | return ret; | |
486 | } | |
487 | ||
5eaef520 | 488 | void free_argv(char **argv, int argc) |
32cfe906 | 489 | { |
5eaef520 | 490 | while (--argc >= 0) |
491 | free(argv[argc]); | |
492 | free(argv); | |
32cfe906 | 493 | } |
03c05291 | 494 | |
495 | int table_num(char *name) | |
496 | { | |
497 | int i; | |
498 | ||
5eaef520 | 499 | for (i = num_tables - 1; i; i--) |
500 | { | |
501 | if (!strcmp(table_name[i], name)) | |
502 | break; | |
503 | } | |
03c05291 | 504 | |
505 | return i; /* 0 = "none" if no match */ | |
506 | } |