/[LeafOK_CVS]/lbbs/src/section_list_loader.c
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Revision 1.29 - (hide annotations)
Sat Jun 21 01:34:12 2025 UTC (8 months, 3 weeks ago) by sysadm
Branch: MAIN
Changes since 1.28: +1 -3 lines
Content type: text/x-csrc 
Remove unused header files
1 sysadm 1.1 /***************************************************************************
2     section_list_loader.c - description
3     -------------------
4     Copyright : (C) 2004-2025 by Leaflet
5     Email : leaflet@leafok.com
6     ***************************************************************************/
7    
8     /***************************************************************************
9     * *
10     * This program is free software; you can redistribute it and/or modify *
11     * it under the terms of the GNU General Public License as published by *
12     * the Free Software Foundation; either version 3 of the License, or *
13     * (at your option) any later version. *
14     * *
15     ***************************************************************************/
16    
17     #include "section_list_loader.h"
18 sysadm 1.11 #include "article_cache.h"
19 sysadm 1.19 #include "bbs.h"
20 sysadm 1.1 #include "log.h"
21     #include "database.h"
22 sysadm 1.4 #include "menu.h"
23 sysadm 1.1 #include <errno.h>
24 sysadm 1.4 #include <signal.h>
25 sysadm 1.29 #include <stdio.h>
26 sysadm 1.1 #include <stdlib.h>
27 sysadm 1.22 #include <string.h>
28 sysadm 1.4 #include <unistd.h>
29    
30 sysadm 1.5 int section_list_loader_pid;
31     int last_article_op_log_mid;
32 sysadm 1.1
33 sysadm 1.2 int load_section_config_from_db(void)
34 sysadm 1.1 {
35 sysadm 1.23 MYSQL *db = NULL;
36     MYSQL_RES *rs = NULL, *rs2 = NULL;
37 sysadm 1.1 MYSQL_ROW row, row2;
38     char sql[SQL_BUFFER_LEN];
39     int32_t sid;
40 sysadm 1.8 char master_list[(BBS_username_max_len + 1) * 3 + 1];
41 sysadm 1.1 SECTION_LIST *p_section;
42 sysadm 1.23 int ret = 0;
43 sysadm 1.1
44 sysadm 1.2 db = db_open();
45     if (db == NULL)
46     {
47     log_error("db_open() error: %s\n", mysql_error(db));
48 sysadm 1.23 ret = -1;
49     goto cleanup;
50 sysadm 1.2 }
51    
52 sysadm 1.1 snprintf(sql, sizeof(sql),
53 sysadm 1.2 "SELECT section_config.SID, sname, section_config.title, section_config.CID, "
54     "read_user_level, write_user_level, section_config.enable * section_class.enable AS enable "
55     "FROM section_config INNER JOIN section_class ON section_config.CID = section_class.CID "
56 sysadm 1.1 "ORDER BY section_config.SID");
57    
58     if (mysql_query(db, sql) != 0)
59     {
60     log_error("Query section_list error: %s\n", mysql_error(db));
61 sysadm 1.23 ret = -2;
62     goto cleanup;
63 sysadm 1.1 }
64     if ((rs = mysql_store_result(db)) == NULL)
65     {
66     log_error("Get section_list data failed\n");
67 sysadm 1.23 ret = -2;
68     goto cleanup;
69 sysadm 1.1 }
70 sysadm 1.2
71     ret = 0;
72 sysadm 1.1 while ((row = mysql_fetch_row(rs)))
73     {
74     sid = atoi(row[0]);
75    
76     // Query section master
77     snprintf(sql, sizeof(sql),
78     "SELECT username FROM section_master "
79     "INNER JOIN user_list ON section_master.UID = user_list.UID "
80     "WHERE SID = %d AND section_master.enable AND (NOW() BETWEEN begin_dt AND end_dt) "
81 sysadm 1.8 "ORDER BY major DESC, begin_dt ASC LIMIT 3",
82 sysadm 1.1 sid);
83    
84     if (mysql_query(db, sql) != 0)
85     {
86     log_error("Query section_master error: %s\n", mysql_error(db));
87 sysadm 1.2 ret = -3;
88     break;
89 sysadm 1.1 }
90     if ((rs2 = mysql_store_result(db)) == NULL)
91     {
92     log_error("Get section_master data failed\n");
93 sysadm 1.2 ret = -3;
94     break;
95 sysadm 1.1 }
96 sysadm 1.8
97     master_list[0] = '\0';
98     while ((row2 = mysql_fetch_row(rs2)))
99 sysadm 1.1 {
100 sysadm 1.8 strncat(master_list, row2[0], sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
101     strncat(master_list, " ", sizeof(master_list) - 1 - strnlen(master_list, sizeof(master_list)));
102 sysadm 1.1 }
103     mysql_free_result(rs2);
104 sysadm 1.23 rs2 = NULL;
105 sysadm 1.1
106     p_section = section_list_find_by_sid(sid);
107    
108     if (p_section == NULL)
109     {
110 sysadm 1.8 p_section = section_list_create(sid, row[1], row[2], master_list);
111 sysadm 1.1 if (p_section == NULL)
112     {
113 sysadm 1.2 log_error("section_list_create() error: load new section sid = %d sname = %s\n", sid, row[1]);
114     ret = -4;
115 sysadm 1.1 break;
116     }
117    
118     // acquire rw lock
119     ret = section_list_rw_lock(p_section);
120     if (ret < 0)
121     {
122     break;
123     }
124     }
125     else
126     {
127     // acquire rw lock
128     ret = section_list_rw_lock(p_section);
129     if (ret < 0)
130     {
131     break;
132     }
133    
134 sysadm 1.28 strncpy(p_section->sname, row[0], sizeof(p_section->sname) - 1);
135 sysadm 1.1 p_section->sname[sizeof(p_section->sname) - 1] = '\0';
136     strncpy(p_section->stitle, row[1], sizeof(p_section->stitle) - 1);
137     p_section->stitle[sizeof(p_section->stitle) - 1] = '\0';
138 sysadm 1.8 strncpy(p_section->master_list, master_list, sizeof(p_section->master_list) - 1);
139     p_section->master_list[sizeof(p_section->master_list) - 1] = '\0';
140 sysadm 1.1 }
141    
142     p_section->class_id = atoi(row[3]);
143     p_section->read_user_level = atoi(row[4]);
144     p_section->write_user_level = atoi(row[5]);
145     p_section->enable = (int8_t)atoi(row[6]);
146    
147     // release rw lock
148     ret = section_list_rw_unlock(p_section);
149     if (ret < 0)
150     {
151     break;
152     }
153     }
154 sysadm 1.23
155     cleanup:
156 sysadm 1.1 mysql_free_result(rs);
157 sysadm 1.2 mysql_close(db);
158    
159     return ret;
160 sysadm 1.1 }
161 sysadm 1.3
162 sysadm 1.9 int append_articles_from_db(int32_t start_aid, int global_lock, int article_count_limit)
163 sysadm 1.3 {
164 sysadm 1.23 MYSQL *db = NULL;
165     MYSQL_RES *rs = NULL;
166 sysadm 1.3 MYSQL_ROW row;
167     char sql[SQL_BUFFER_LEN];
168     ARTICLE article;
169 sysadm 1.5 ARTICLE *p_topic;
170 sysadm 1.3 SECTION_LIST *p_section = NULL;
171     int32_t last_sid = 0;
172 sysadm 1.16 char sub_ip[IP_ADDR_LEN];
173 sysadm 1.9 int article_count = 0;
174 sysadm 1.3 int ret = 0;
175     int i;
176    
177     db = db_open();
178     if (db == NULL)
179     {
180     log_error("db_open() error: %s\n", mysql_error(db));
181 sysadm 1.23 ret = -1;
182     goto cleanup;
183 sysadm 1.3 }
184    
185     snprintf(sql, sizeof(sql),
186 sysadm 1.11 "SELECT bbs.AID, TID, SID, bbs.CID, UID, visible, excerption, ontop, `lock`, "
187     "transship, username, nickname, title, UNIX_TIMESTAMP(sub_dt) AS sub_dt, "
188 sysadm 1.16 "sub_ip, bbs_content.content "
189 sysadm 1.11 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
190     "WHERE bbs.AID >= %d ORDER BY bbs.AID LIMIT %d",
191 sysadm 1.9 start_aid, article_count_limit);
192 sysadm 1.3
193     if (mysql_query(db, sql) != 0)
194     {
195     log_error("Query article list error: %s\n", mysql_error(db));
196 sysadm 1.23 ret = -2;
197     goto cleanup;
198 sysadm 1.3 }
199 sysadm 1.11 if ((rs = mysql_use_result(db)) == NULL)
200 sysadm 1.3 {
201     log_error("Get article list data failed\n");
202 sysadm 1.23 ret = -2;
203     goto cleanup;
204 sysadm 1.3 }
205    
206     // acquire global lock
207 sysadm 1.23 if (global_lock && (ret = section_list_rw_lock(NULL)) < 0)
208 sysadm 1.3 {
209 sysadm 1.23 log_error("section_list_rw_lock(sid = 0) error\n");
210     goto cleanup;
211 sysadm 1.3 }
212    
213     while ((row = mysql_fetch_row(rs)))
214     {
215 sysadm 1.22 memset(&article, 0, sizeof(ARTICLE));
216 sysadm 1.3
217     // copy data of article
218     i = 0;
219    
220     article.aid = atoi(row[i++]);
221     article.tid = atoi(row[i++]);
222     article.sid = atoi(row[i++]);
223     article.cid = atoi(row[i++]);
224     article.uid = atoi(row[i++]);
225     article.visible = (int8_t)atoi(row[i++]);
226     article.excerption = (int8_t)atoi(row[i++]);
227     article.ontop = (int8_t)atoi(row[i++]);
228     article.lock = (int8_t)atoi(row[i++]);
229 sysadm 1.5 article.transship = (int8_t)atoi(row[i++]);
230 sysadm 1.3
231     strncpy(article.username, row[i++], sizeof(article.username) - 1);
232     article.username[sizeof(article.username) - 1] = '\0';
233     strncpy(article.nickname, row[i++], sizeof(article.nickname) - 1);
234     article.nickname[sizeof(article.nickname) - 1] = '\0';
235     strncpy(article.title, row[i++], sizeof(article.title) - 1);
236     article.title[sizeof(article.title) - 1] = '\0';
237    
238     article.sub_dt = atol(row[i++]);
239    
240 sysadm 1.16 strncpy(sub_ip, row[i++], sizeof(sub_ip) - 1);
241     sub_ip[sizeof(sub_ip) - 1] = '\0';
242     ip_mask(sub_ip, 1, '*');
243    
244 sysadm 1.3 // release lock of last section if different from current one
245     if (!global_lock && article.sid != last_sid && last_sid != 0)
246     {
247     if ((ret = section_list_rw_unlock(p_section)) < 0)
248     {
249 sysadm 1.11 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
250 sysadm 1.3 break;
251     }
252     }
253    
254     if ((p_section = section_list_find_by_sid(article.sid)) == NULL)
255     {
256     log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", article.sid);
257 sysadm 1.4 ret = ERR_UNKNOWN_SECTION; // Unknown section found
258 sysadm 1.3 break;
259     }
260    
261 sysadm 1.5 if (article.visible != 0 && article.tid != 0)
262     {
263     // Check if topic article is visible
264     p_topic = article_block_find_by_aid(article.tid);
265     if (p_topic == NULL || p_topic->visible == 0)
266     {
267     // log_error("Set article (aid = %d) as invisible due to invisible or non-existing topic head\n", article.aid);
268     article.tid = 0;
269     article.visible = 0;
270     }
271     }
272    
273 sysadm 1.3 // acquire lock of current section if different from last one
274     if (!global_lock && article.sid != last_sid)
275     {
276 sysadm 1.4 if ((ret = section_list_rw_lock(p_section)) < 0)
277 sysadm 1.3 {
278 sysadm 1.11 log_error("section_list_rw_lock(sid=0) error\n");
279 sysadm 1.3 break;
280     }
281     }
282    
283     // append article to section list
284     last_sid = article.sid;
285    
286     if (section_list_append_article(p_section, &article) < 0)
287     {
288 sysadm 1.11 log_error("section_list_append_article(sid=%d, aid=%d) error\n",
289 sysadm 1.3 p_section->sid, article.aid);
290     ret = -3;
291     break;
292     }
293 sysadm 1.9
294     article_count++;
295    
296 sysadm 1.16 if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, &article, p_section, row[i++], sub_ip, 0) < 0)
297 sysadm 1.11 {
298     log_error("article_cache_generate(aid=%d, cid=%d) error\n", article.aid, article.cid);
299     ret = -4;
300     break;
301     }
302 sysadm 1.3 }
303    
304     // release lock of last section
305     if (!global_lock && last_sid != 0)
306     {
307     if ((ret = section_list_rw_unlock(p_section)) < 0)
308     {
309 sysadm 1.11 log_error("section_list_rw_unlock(sid=%d) error\n", p_section->sid);
310 sysadm 1.3 }
311     }
312    
313     // release global lock
314 sysadm 1.23 if (global_lock && (ret = section_list_rw_unlock(NULL)) < 0)
315 sysadm 1.3 {
316 sysadm 1.23 log_error("section_list_rw_unlock(sid=0) error\n");
317 sysadm 1.3 }
318    
319     cleanup:
320     mysql_free_result(rs);
321     mysql_close(db);
322    
323 sysadm 1.9 return (ret < 0 ? ret : article_count);
324 sysadm 1.3 }
325 sysadm 1.4
326 sysadm 1.5 int set_last_article_op_log_from_db(void)
327     {
328 sysadm 1.23 MYSQL *db = NULL;
329     MYSQL_RES *rs = NULL;
330 sysadm 1.5 MYSQL_ROW row;
331     char sql[SQL_BUFFER_LEN];
332 sysadm 1.23 int ret = 0;
333 sysadm 1.5
334     db = db_open();
335     if (db == NULL)
336     {
337     log_error("db_open() error: %s\n", mysql_error(db));
338 sysadm 1.23 ret = -1;
339     goto cleanup;
340 sysadm 1.5 }
341    
342     snprintf(sql, sizeof(sql),
343     "SELECT MID FROM bbs_article_op ORDER BY MID DESC LIMIT 1");
344    
345     if (mysql_query(db, sql) != 0)
346     {
347     log_error("Query article op error: %s\n", mysql_error(db));
348 sysadm 1.23 ret = -2;
349     goto cleanup;
350 sysadm 1.5 }
351     if ((rs = mysql_store_result(db)) == NULL)
352     {
353     log_error("Get article op data failed\n");
354 sysadm 1.23 ret = -2;
355     goto cleanup;
356 sysadm 1.5 }
357    
358     if ((row = mysql_fetch_row(rs)))
359     {
360     last_article_op_log_mid = atoi(row[0]);
361     }
362    
363 sysadm 1.23 cleanup:
364 sysadm 1.5 mysql_free_result(rs);
365     mysql_close(db);
366    
367 sysadm 1.23 return (ret < 0 ? ret : last_article_op_log_mid);
368 sysadm 1.5 }
369    
370 sysadm 1.9 int apply_article_op_log_from_db(int op_count_limit)
371 sysadm 1.5 {
372 sysadm 1.23 MYSQL *db = NULL;
373     MYSQL_RES *rs = NULL, *rs2 = NULL;
374 sysadm 1.5 MYSQL_ROW row, row2;
375     char sql[SQL_BUFFER_LEN];
376     ARTICLE *p_article;
377     SECTION_LIST *p_section = NULL;
378     SECTION_LIST *p_section_dest;
379 sysadm 1.16 char sub_ip[IP_ADDR_LEN];
380 sysadm 1.5 int32_t last_sid = 0;
381     int32_t sid_dest;
382 sysadm 1.9 int op_count = 0;
383 sysadm 1.5 int ret = 0;
384    
385     db = db_open();
386     if (db == NULL)
387     {
388     log_error("db_open() error: %s\n", mysql_error(db));
389 sysadm 1.23 ret = -1;
390     goto cleanup;
391 sysadm 1.5 }
392    
393     snprintf(sql, sizeof(sql),
394     "SELECT MID, AID, type FROM bbs_article_op "
395 sysadm 1.9 "WHERE MID > %d AND type NOT IN ('A') "
396     "ORDER BY MID LIMIT %d",
397     last_article_op_log_mid, op_count_limit);
398 sysadm 1.5
399     if (mysql_query(db, sql) != 0)
400     {
401     log_error("Query article log error: %s\n", mysql_error(db));
402 sysadm 1.23 ret = -2;
403     goto cleanup;
404 sysadm 1.5 }
405     if ((rs = mysql_store_result(db)) == NULL)
406     {
407     log_error("Get article log data failed\n");
408 sysadm 1.23 ret = -2;
409     goto cleanup;
410 sysadm 1.5 }
411    
412     while ((row = mysql_fetch_row(rs)))
413     {
414     p_article = article_block_find_by_aid(atoi(row[1]));
415     if (p_article == NULL) // related article has not been appended yet
416     {
417     ret = -2;
418     break;
419     }
420    
421     // release lock of last section if different from current one
422     if (p_article->sid != last_sid && last_sid != 0)
423     {
424     if ((ret = section_list_rw_unlock(p_section)) < 0)
425     {
426     log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
427     break;
428     }
429     }
430    
431     if ((p_section = section_list_find_by_sid(p_article->sid)) == NULL)
432     {
433     log_error("section_list_find_by_sid(%d) error: unknown section, try reloading section config\n", p_article->sid);
434     ret = ERR_UNKNOWN_SECTION; // Unknown section found
435     break;
436     }
437    
438     // acquire lock of current section if different from last one
439     if (p_article->sid != last_sid)
440     {
441     if ((ret = section_list_rw_lock(p_section)) < 0)
442     {
443     log_error("section_list_rw_lock(sid = 0) error\n");
444     break;
445     }
446     }
447    
448     last_sid = p_article->sid;
449    
450     switch (row[2][0])
451     {
452     case 'A': // Add article
453     log_error("Operation type=A should not be found\n");
454     break;
455     case 'D': // Delete article
456     case 'X': // Delete article by Admin
457 sysadm 1.20 if (section_list_set_article_visible(p_section, atoi(row[1]), 0) < 0)
458 sysadm 1.5 {
459 sysadm 1.20 log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=0) error\n", p_section->sid, atoi(row[1]));
460     }
461     if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
462     {
463     log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
464 sysadm 1.5 }
465     break;
466     case 'S': // Restore article
467 sysadm 1.20 if (section_list_set_article_visible(p_section, atoi(row[1]), 1) < 0)
468     {
469     log_error("section_list_set_article_visible(sid=%d, aid=%d, visible=1) error\n", p_section->sid, atoi(row[1]));
470     }
471     if (section_list_calculate_page(p_section, atoi(row[1])) < 0)
472     {
473     log_error("section_list_calculate_page(aid=%d) error\n", atoi(row[1]));
474     }
475 sysadm 1.5 break;
476     case 'L': // Lock article
477     p_article->lock = 1;
478     break;
479     case 'U': // Unlock article
480     p_article->lock = 0;
481     break;
482     case 'M': // Modify article
483 sysadm 1.9 snprintf(sql, sizeof(sql),
484 sysadm 1.16 "SELECT bbs.CID, sub_ip, bbs_content.content "
485 sysadm 1.11 "FROM bbs INNER JOIN bbs_content ON bbs.CID = bbs_content.CID "
486     "WHERE bbs.AID = %d",
487 sysadm 1.9 p_article->aid);
488    
489     if (mysql_query(db, sql) != 0)
490     {
491     log_error("Query article error: %s\n", mysql_error(db));
492     ret = -3;
493     break;
494     }
495 sysadm 1.12 if ((rs2 = mysql_use_result(db)) == NULL)
496 sysadm 1.9 {
497     log_error("Get article data failed\n");
498     ret = -3;
499     break;
500     }
501     if ((row2 = mysql_fetch_row(rs2)))
502     {
503     p_article->cid = atoi(row2[0]);
504 sysadm 1.11
505 sysadm 1.16 strncpy(sub_ip, row2[1], sizeof(sub_ip) - 1);
506     sub_ip[sizeof(sub_ip) - 1] = '\0';
507     ip_mask(sub_ip, 1, '*');
508    
509     if (article_cache_generate(VAR_ARTICLE_CACHE_DIR, p_article, p_section, row2[2], sub_ip, 0) < 0)
510 sysadm 1.11 {
511     log_error("article_cache_generate(aid=%d, cid=%d) error\n", p_article->aid, p_article->cid);
512     ret = -4;
513     }
514 sysadm 1.9 }
515     else
516     {
517     p_article->cid = 0;
518     ret = -4;
519     }
520     mysql_free_result(rs2);
521 sysadm 1.23 rs2 = NULL;
522 sysadm 1.21
523     p_article->excerption = 0; // Set excerption = 0 implicitly in case of rare condition
524 sysadm 1.5 break;
525     case 'T': // Move article
526     snprintf(sql, sizeof(sql),
527     "SELECT SID FROM bbs WHERE AID = %d",
528     p_article->aid);
529    
530     if (mysql_query(db, sql) != 0)
531     {
532     log_error("Query article error: %s\n", mysql_error(db));
533     ret = -3;
534     break;
535     }
536     if ((rs2 = mysql_store_result(db)) == NULL)
537     {
538     log_error("Get article data failed\n");
539     ret = -3;
540     break;
541     }
542     if ((row2 = mysql_fetch_row(rs2)))
543     {
544     sid_dest = atoi(row2[0]);
545     }
546     else
547     {
548     sid_dest = 0;
549     ret = -4;
550     }
551     mysql_free_result(rs2);
552 sysadm 1.23 rs2 = NULL;
553 sysadm 1.5
554     if (sid_dest > 0 && sid_dest != p_article->sid)
555     {
556     p_section_dest = section_list_find_by_sid(sid_dest);
557     if (p_section_dest == NULL)
558     {
559     ret = ERR_UNKNOWN_SECTION;
560     break;
561     }
562 sysadm 1.6 // acquire lock of dest section
563     if ((ret = section_list_rw_lock(p_section_dest)) < 0)
564     {
565     log_error("section_list_rw_lock(sid = %d) error\n", p_section_dest);
566     break;
567     }
568 sysadm 1.5 // Move topic
569     if ((ret = section_list_move_topic(p_section, p_section_dest, p_article->aid)) < 0)
570     {
571 sysadm 1.6 log_error("section_list_move_topic(src_sid=%d, dest_sid=%d, aid=%d) error (%d), retry in the next loop\n",
572     p_section->sid, p_section_dest->sid, p_article->aid, ret);
573     }
574     // release lock of dest section
575     if (section_list_rw_unlock(p_section_dest) < 0)
576     {
577     log_error("section_list_rw_unlock(sid = %d) error\n", p_section_dest);
578     ret = -1;
579 sysadm 1.5 }
580     }
581     break;
582     case 'E': // Set article as excerption
583     p_article->excerption = 1;
584     break;
585     case 'O': // Unset article as excerption
586     p_article->excerption = 0;
587     break;
588     case 'F': // Set article on top
589     p_article->ontop = 1;
590     break;
591     case 'V': // Unset article on top
592     p_article->ontop = 0;
593     break;
594     case 'Z': // Set article as trnasship
595     p_article->transship = 1;
596     break;
597     default:
598     // log_error("Operation type=%s unknown, mid=%s\n", row[2], row[0]);
599     break;
600     }
601    
602     if (ret < 0)
603     {
604     break;
605     }
606    
607     // Update MID with last successfully proceeded article_op_log
608     last_article_op_log_mid = atoi(row[0]);
609 sysadm 1.9
610     op_count++;
611 sysadm 1.5 }
612    
613     // release lock of last section
614     if (last_sid != 0)
615     {
616     if ((ret = section_list_rw_unlock(p_section)) < 0)
617     {
618     log_error("section_list_rw_unlock(sid = %d) error\n", p_section->sid);
619     }
620     }
621    
622 sysadm 1.23 cleanup:
623     mysql_free_result(rs2);
624 sysadm 1.5 mysql_free_result(rs);
625     mysql_close(db);
626    
627 sysadm 1.9 return (ret < 0 ? ret : op_count);
628 sysadm 1.5 }
629    
630 sysadm 1.4 int section_list_loader_launch(void)
631     {
632     int pid;
633     int ret;
634     int32_t last_aid;
635     int article_count;
636     int load_count;
637 sysadm 1.5 int last_mid;
638 sysadm 1.4 int i;
639    
640     if (section_list_loader_pid != 0)
641     {
642     log_error("section_list_loader already running, pid = %d\n", section_list_loader_pid);
643     return -2;
644     }
645    
646     pid = fork();
647    
648     if (pid > 0) // Parent process
649     {
650     SYS_child_process_count++;
651     section_list_loader_pid = pid;
652 sysadm 1.18 log_common("Section list loader process (pid = %d) start\n", pid);
653 sysadm 1.4 return 0;
654     }
655     else if (pid < 0) // Error
656     {
657     log_error("fork() error (%d)\n", errno);
658     return -1;
659     }
660    
661     // Child process
662     SYS_child_process_count = 0;
663    
664     // Detach menu in shared memory
665     detach_menu_shm(p_bbs_menu);
666     free(p_bbs_menu);
667     p_bbs_menu = NULL;
668    
669     // Do section data loader periodically
670     while (!SYS_server_exit)
671     {
672     if (SYS_section_list_reload)
673     {
674     SYS_section_list_reload = 0;
675    
676     // Load section config
677     if (load_section_config_from_db() < 0)
678     {
679     log_error("load_section_config_from_db() error\n");
680     }
681     else
682     {
683 sysadm 1.27 log_common("Reload section config successfully\n");
684 sysadm 1.4 }
685     }
686    
687     // Load section articles
688     article_count = article_block_article_count();
689    
690 sysadm 1.9 do
691 sysadm 1.4 {
692 sysadm 1.9 last_aid = article_block_last_aid();
693 sysadm 1.4
694 sysadm 1.9 if ((ret = append_articles_from_db(last_aid + 1, 0, LOAD_ARTICLE_COUNT_LIMIT)) < 0)
695 sysadm 1.4 {
696 sysadm 1.9 log_error("append_articles_from_db(%d, 0, %d) error\n", last_aid + 1, LOAD_ARTICLE_COUNT_LIMIT);
697    
698     if (ret == ERR_UNKNOWN_SECTION)
699     {
700     SYS_section_list_reload = 1; // Force reload section_list
701     }
702 sysadm 1.4 }
703 sysadm 1.9 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
704 sysadm 1.5
705     load_count = article_block_article_count() - article_count;
706     if (load_count > 0)
707     {
708 sysadm 1.17 log_common("Incrementally load %d articles, last_aid = %d\n", load_count, article_block_last_aid());
709 sysadm 1.5 }
710    
711     if (SYS_section_list_reload)
712     {
713     continue;
714     }
715    
716     // Load article_op log
717     last_mid = last_article_op_log_mid;
718    
719 sysadm 1.9 do
720 sysadm 1.4 {
721 sysadm 1.9 if ((ret = apply_article_op_log_from_db(LOAD_ARTICLE_COUNT_LIMIT)) < 0)
722     {
723     log_error("apply_article_op_log_from_db() error\n");
724 sysadm 1.4
725 sysadm 1.9 if (ret == ERR_UNKNOWN_SECTION)
726     {
727     SYS_section_list_reload = 1; // Force reload section_list
728     }
729 sysadm 1.4 }
730 sysadm 1.9 } while (ret == LOAD_ARTICLE_COUNT_LIMIT);
731 sysadm 1.4
732 sysadm 1.5 if (last_article_op_log_mid > last_mid)
733     {
734 sysadm 1.17 log_common("Proceeded %d article logs, last_mid = %d\n", last_article_op_log_mid - last_mid, last_article_op_log_mid);
735 sysadm 1.5 }
736    
737     if (SYS_section_list_reload)
738     {
739     continue;
740     }
741    
742 sysadm 1.19 for (i = 0; i < BBS_section_list_load_interval && !SYS_server_exit && !SYS_section_list_reload; i++)
743 sysadm 1.5 {
744     sleep(1);
745 sysadm 1.4 }
746     }
747    
748     // Child process exit
749    
750     // Detach data pools shm
751     detach_section_list_shm();
752     detach_article_block_shm();
753     detach_trie_dict_shm();
754    
755 sysadm 1.17 log_common("Section list loader process exit normally\n");
756 sysadm 1.4 log_end();
757    
758     section_list_loader_pid = 0;
759    
760     _exit(0);
761    
762     return 0;
763     }
764    
765     int section_list_loader_reload(void)
766     {
767     if (section_list_loader_pid == 0)
768     {
769     log_error("section_list_loader not running\n");
770     return -2;
771     }
772    
773     if (kill(section_list_loader_pid, SIGHUP) < 0)
774     {
775     log_error("Send SIGTERM signal failed (%d)\n", errno);
776     return -1;
777     }
778    
779     return 0;
780     }
781 sysadm 1.7
782 sysadm 1.10 int query_section_articles(SECTION_LIST *p_section, int page_id, ARTICLE *p_articles[], int *p_article_count, int *p_page_count)
783 sysadm 1.7 {
784     ARTICLE *p_article;
785     ARTICLE *p_next_page_first_article;
786     int ret = 0;
787    
788 sysadm 1.10 if (p_section == NULL || p_articles == NULL || p_article_count == NULL || p_page_count == NULL)
789 sysadm 1.7 {
790     log_error("query_section_articles() NULL pointer error\n");
791     return -1;
792     }
793    
794     // acquire lock of section
795     if ((ret = section_list_rd_lock(p_section)) < 0)
796     {
797     log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
798     return -2;
799     }
800    
801 sysadm 1.10 *p_page_count = p_section->page_count;
802    
803 sysadm 1.9 if (p_section->visible_article_count == 0)
804     {
805     *p_article_count = 0;
806     }
807     else if (page_id < 0 || page_id >= p_section->page_count)
808 sysadm 1.7 {
809 sysadm 1.8 log_error("Invalid page_id=%d, not in range [0, %d)\n", page_id, p_section->page_count);
810 sysadm 1.7 ret = -3;
811     }
812     else
813     {
814     ret = page_id;
815     p_article = p_section->p_page_first_article[page_id];
816     p_next_page_first_article =
817     (page_id == p_section->page_count - 1 ? p_section->p_article_head : p_section->p_page_first_article[page_id + 1]);
818     *p_article_count = 0;
819    
820     do
821     {
822     if (p_article->visible)
823     {
824     p_articles[*p_article_count] = p_article;
825     (*p_article_count)++;
826     }
827     p_article = p_article->p_next;
828     } while (p_article != p_next_page_first_article && (*p_article_count) <= BBS_article_limit_per_page);
829 sysadm 1.8
830     if (*p_article_count != (page_id < p_section->page_count - 1 ? BBS_article_limit_per_page : p_section->last_page_visible_article_count))
831     {
832     log_error("Inconsistent visible article count %d detected in section %d page %d\n", *p_article_count, p_section->sid, page_id);
833     }
834 sysadm 1.7 }
835    
836     // release lock of section
837 sysadm 1.8 if (section_list_rd_unlock(p_section) < 0)
838 sysadm 1.7 {
839     log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
840     ret = -2;
841     }
842    
843     return ret;
844     }
845 sysadm 1.14
846 sysadm 1.24 int locate_article_in_section(SECTION_LIST *p_section, const ARTICLE *p_article_cur, int direction, int step,
847 sysadm 1.15 int *p_page_id, int *p_visible_offset, int *p_article_count)
848 sysadm 1.14 {
849 sysadm 1.15 const ARTICLE *p_article = NULL;
850     ARTICLE *p_tmp;
851 sysadm 1.14 int32_t aid = 0;
852 sysadm 1.24 int page_id = 0;
853     int offset = 0;
854 sysadm 1.14 int ret = 0;
855 sysadm 1.15 int i;
856 sysadm 1.14
857 sysadm 1.15 if (p_section == NULL || p_article_cur == NULL || p_page_id == NULL || p_visible_offset == NULL || p_article_count == NULL)
858 sysadm 1.14 {
859     log_error("locate_article_in_section() NULL pointer error\n");
860     return -1;
861     }
862    
863     // acquire lock of section
864     if ((ret = section_list_rd_lock(p_section)) < 0)
865     {
866     log_error("section_list_rd_lock(sid = %d) error\n", p_section->sid);
867     return -2;
868     }
869    
870     if (direction == 0)
871     {
872     aid = p_article_cur->aid;
873     }
874     else if (direction == 1)
875     {
876 sysadm 1.24 for (p_article = p_article_cur; step > 0 && p_article->p_topic_next->aid > p_article_cur->aid; p_article = p_article->p_topic_next)
877 sysadm 1.14 {
878 sysadm 1.24 if (p_article->visible)
879     {
880     step--;
881     }
882     }
883 sysadm 1.15
884 sysadm 1.25 aid = (p_article->aid > p_article_cur->aid && p_article->visible ? p_article->aid : 0);
885 sysadm 1.14 }
886     else if (direction == -1)
887     {
888 sysadm 1.24 for (p_article = p_article_cur; step > 0 && p_article->p_topic_prior->aid < p_article_cur->aid; p_article = p_article->p_topic_prior)
889 sysadm 1.14 {
890 sysadm 1.24 if (p_article->visible)
891     {
892     step--;
893     }
894     }
895 sysadm 1.15
896 sysadm 1.25 aid = (p_article->aid < p_article_cur->aid && p_article->visible ? p_article->aid : 0);
897 sysadm 1.14 }
898    
899 sysadm 1.15 p_article = NULL;
900    
901 sysadm 1.14 if (aid > 0)
902     {
903 sysadm 1.15 p_article = section_list_find_article_with_offset(p_section, aid, &page_id, &offset, &p_tmp);
904 sysadm 1.14 if (p_article != NULL)
905     {
906 sysadm 1.15 *p_article_count = (page_id == p_section->page_count - 1 ? p_section->last_page_visible_article_count : BBS_article_limit_per_page);
907    
908     p_article = p_section->p_page_first_article[page_id];
909 sysadm 1.25 for (i = 0; i < *p_article_count && p_article != NULL;)
910 sysadm 1.15 {
911     if (p_article->visible)
912     {
913     if (p_article->aid == aid)
914     {
915     *p_page_id = page_id;
916     *p_visible_offset = i;
917     break;
918     }
919     i++;
920     if (i >= *p_article_count)
921     {
922     log_error("Visible article (aid=%d) not found in page %d\n", aid, page_id);
923     p_article = NULL;
924 sysadm 1.25 break;
925 sysadm 1.15 }
926     }
927     p_article = p_article->p_next;
928     }
929 sysadm 1.14 }
930     }
931    
932     // release lock of section
933     if (section_list_rd_unlock(p_section) < 0)
934     {
935     log_error("section_list_rd_unlock(sid = %d) error\n", p_section->sid);
936     ret = -2;
937     }
938    
939     return (ret < 0 ? ret : (p_article == NULL ? 0 : 1));
940     }
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