mod.c

   1 #include "mod.h"
   2
   3 #include <libxml/xmlstring.h>
   4 #include <libxml/HTMLparser.h>
   5
   6 #include <stdint.h>
   7 #include <inttypes.h>
   8 #include <sys/wait.h>
   9 #include <curl/curl.h>
  10
  11 #include <magic.h>
  12
  13 #include "entities.h"
  14 #include "quotes.h"
  15
  16 static const char *nick_self;
  17 static unsigned ponify;
  18 #define elements(x) (sizeof(x)/sizeof(*x))
  19
  20 static struct tdb_context *feed_db, *chan_db, *mail_db, *seen_db;
  21
  22 static struct command_hash command_channel = { "#", NULL };
  23
  24 #define sstrncmp(a, b) (strncmp(a, b, sizeof(b)-1))
  25 #define sstrncasecmp(a, b) (strncasecmp(a, b, sizeof(b)-1))
  26
  27 #define SPAM_CUTOFF 5
  28
  29 static int pipe_command(struct bio *b, const char *target, const char *nick, int redirect_stdout, int redirect_stderr, char *argv[])
  30 {
  31         int fd[2];
  32         int lines = 0;
  33         if (pipe2(fd, O_CLOEXEC) < 0) {
  34                 privmsg(b, target, "Could not create pipe: %m");
  35                 return -1;
  36         }
  37         pid_t pid = fork();
  38         if (pid < 0) {
  39                 privmsg(b, target, "Could not fork: %m");
  40                 close(fd[0]);
  41                 close(fd[1]);
  42                 return -1;
  43         } else if (!pid) {
  44                 int fdnull = open("/dev/null", O_WRONLY|O_CLOEXEC);
  45                 close(fd[0]);
  46                 if (dup3(redirect_stdout ? fd[1] : fdnull, 1, 0) < 0)
  47                         exit(errno);
  48                 if (dup3(redirect_stderr ? fd[1] : fdnull, 2, 0) < 0)
  49                         exit(errno);
  50                 exit(execv(argv[0], argv));
  51         } else {
  52                 int loc = -1;
  53                 char buffer[0x100];
  54                 int bufptr = 0, ret;
  55                 close(fd[1]);
  56                 fcntl(fd[0], F_SETFL, O_NONBLOCK);
  57                 while ((ret = waitpid(pid, &loc, WNOHANG)) >= 0) {
  58                         while (read(fd[0], buffer+bufptr, 1) == 1) {
  59                                 if (buffer[bufptr] != '\n' && bufptr < sizeof(buffer)-1) {
  60                                         bufptr++;
  61                                         continue;
  62                                 } else if (bufptr) {
  63                                         buffer[bufptr] = 0;
  64                                         bufptr = 0;
  65                                         lines++;
  66                                         if (lines < SPAM_CUTOFF)
  67                                                 privmsg(b, nick, "%s", buffer);
  68                                         else
  69                                                 fprintf(stderr, "%s\n", buffer);
  70                                 }
  71                         }
  72
  73                         if (ret) {
  74                                 if (bufptr) {
  75                                         buffer[bufptr] = 0;
  76                                         if (lines < SPAM_CUTOFF)
  77                                                 privmsg(b, nick, "%s", buffer);
  78                                         else
  79                                                 fprintf(stderr, "%s\n", buffer);
  80                                 }
  81                                 if (lines >= SPAM_CUTOFF)
  82                                         privmsg(b, nick, "%i lines suppressed", lines - SPAM_CUTOFF + 1);
  83                                 break;
  84                         }
  85                 }
  86                 if (ret < 0)
  87                         privmsg(b, target, "error on waitpid: %m");
  88                 else
  89                         ret = loc;
  90                 close(fd[0]);
  91                 return ret;
  92         }
  93 }
  94
  95 #include "local.c"
  96
  97 static struct command_hash commands[2048];
  98
  99 static void command_abort(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 100 {
 101         abort();
 102         return;
 103 }
 104
 105 static void command_crash(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 106 {
 107         *(char*)0 = 0;
 108 }
 109
 110 static void command_coinflip(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 111 {
 112         if (getrand() & 1)
 113                 action(b, target, "whirrrs and clicks excitedly at %s", nick);
 114         else
 115                 action(b, target, "eyes %s as nothing happens", nick);
 116 }
 117
 118 static void command_shesaid(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 119 {
 120         privmsg(b, target, "%s: \"%s\"", args ? args : nick, women_quotes[getrand() % elements(women_quotes)]);
 121 }
 122
 123 static void squash(char *title)
 124 {
 125         char *start = title;
 126         goto start;
 127         while (*title) {
 128                 while (*title != '\n' && *title != '\r' && *title != '\t' && *title != ' ' && *title) {
 129                         *(start++) = *(title++);
 130                 }
 131                 if (*title)
 132                         *(start++) = ' ';
 133 start:
 134                 while (*title == '\n' || *title == '\r' || *title == '\t' || *title == ' ')
 135                         title++;
 136         }
 137         *start = 0;
 138 }
 139
 140 struct curl_download_context
 141 {
 142         char *data;
 143         size_t len;
 144 };
 145
 146 static size_t write_data(void *ptr, size_t size, size_t nmemb, void *member) {
 147         struct curl_download_context *ctx = member;
 148         size *= nmemb;
 149         ctx->data = realloc(ctx->data, ctx->len + size);
 150         memcpy(ctx->data + ctx->len, ptr, size);
 151         ctx->len += size;
 152         return size;
 153 }
 154
 155 static const char *get_text(xmlNode *cur)
 156 {
 157         for (; cur; cur = cur->next) {
 158                 if (cur->type == XML_TEXT_NODE)
 159                         return cur->content;
 160         }
 161         return NULL;
 162 }
 163
 164 static const char *get_link(xmlAttr *cur, const char *which)
 165 {
 166         for (; cur; cur = cur->next) {
 167                 if (!strcasecmp(cur->name, which))
 168                         return get_text(cur->children);
 169         }
 170         return NULL;
 171 }
 172
 173 static int get_feed_entry(struct bio *b, const char *nick, const char *target, const char *category, xmlNode *entry, const char **title, const char **link)
 174 {
 175         const char *cur_title = NULL, *cur_link = NULL;
 176         xmlNode *cur;
 177         int cur_match = !category;
 178         for (cur = entry->children; cur; cur = cur->next) {
 179                 const char *name = cur->name, *cur_cat;
 180                 if (cur->type != XML_ELEMENT_NODE)
 181                         continue;
 182                 else if (!strcasecmp(name, "link")) {
 183                         const char *ishtml = get_link(cur->properties, "type");
 184                         const char *rel = get_link(cur->properties, "rel");
 185                         if ((!ishtml || !strcasecmp(ishtml, "text/html")) &&
 186                             rel && !strcasecmp(rel, "alternate"))
 187                                 cur_link = get_link(cur->properties, "href");
 188                 } else if (!strcasecmp(name, "title"))
 189                         cur_title = get_text(cur->children);
 190                 else if (!cur_match && !strcasecmp(name, "category") &&
 191                          (cur_cat = get_link(cur->properties, "term")) &&
 192                          strcasestr(cur_cat, category))
 193                         cur_match = 1;
 194         }
 195
 196         if (cur_title)
 197                 *title = cur_title;
 198         else
 199                 *title = "<no title>";
 200         *link = cur_link;
 201         return !cur_link  ? -1 : cur_match;
 202 }
 203
 204 static const char *walk_feed(struct bio *b, const char *nick, const char *target, const char *url, const char *category, xmlNode *root, const char *last_link)
 205 {
 206         const char *main_title = NULL, *main_subtitle = NULL, *main_link = NULL, *title, *link, *prev_link = NULL, *prev_title = NULL;
 207         char *t;
 208         int match, updates = 0;
 209         xmlNode *cur, *entry = NULL;
 210         for (cur = root->children; cur; cur = cur->next) {
 211                 const char *name = cur->name;
 212                 if (cur->type != XML_ELEMENT_NODE)
 213                         continue;
 214                 else if (!strcasecmp(name, "category"))
 215                         continue;
 216                 else if (!strcasecmp(name, "entry"))
 217                         entry = entry ? entry : cur;
 218                 else if (!strcasecmp(name, "title"))
 219                         main_title = get_text(cur->children);
 220                 else if (!strcasecmp(name, "subtitle"))
 221                         main_subtitle = get_text(cur->children);
 222                 else if (!strcasecmp(name, "link")) {
 223                         const char *ishtml = get_link(cur->properties, "type");
 224                         const char *rel = get_link(cur->properties, "rel");
 225                         if ((!ishtml || !strcasecmp(ishtml, "text/html")) && rel && !strcasecmp(rel, "alternate"))
 226                                 main_link = get_link(cur->properties, "href");
 227                 }
 228         }
 229         if (!main_link || !main_title) {
 230                 privmsg(b, target, "%s: Failed to parse main: %s %s", nick, main_link, main_title);
 231                 return NULL;
 232         }
 233         if (!entry)
 234                 return NULL;
 235
 236         if (!last_link)
 237                 privmsg(b, target, "adding blog %s \"%s\": %s", main_link, main_title, main_subtitle);
 238
 239         match = get_feed_entry(b, nick, target, category, entry, &title, &link);
 240         if (match < 0)
 241                 return NULL;
 242
 243         for (; !match && entry; entry = entry->next) {
 244                 if (!strcasecmp(entry->name, "entry"))
 245                         match = get_feed_entry(b, nick, target, category, entry, &title, &link);
 246         }
 247
 248         if (match < 0)
 249                 return NULL;
 250         if (!last_link) {
 251                 if (match > 0) {
 252                         t = strdup(title);
 253                         squash(t);
 254                         privmsg(b, target, "Most recent entry: %s %s", link, t);
 255                         free(t);
 256                 } else
 257                         privmsg(b, target, "Currently having no entries for this feed that matches the filter");
 258                 return link;
 259         }
 260         if (!strcmp(last_link, link) || !match || !entry)
 261                 return link;
 262
 263         for (entry = entry->next; entry; entry = entry->next) {
 264                 const char *cur_link, *cur_title;
 265                 if (strcasecmp(entry->name, "entry"))
 266                         continue;
 267                 match = get_feed_entry(b, nick, target, category, entry, &cur_title, &cur_link);
 268                 if (match < 0 || !strcmp(last_link, cur_link))
 269                         break;
 270                 if (match) {
 271                         prev_link = cur_link;
 272                         prev_title = cur_title;
 273                         updates++;
 274                 }
 275         }
 276         if (updates == 1) {
 277                 t = strdup(prev_title);
 278                 squash(t);
 279                 privmsg(b, target, "( %s ): %s", prev_link, t);
 280                 free(t);
 281         } else if (updates > 1)
 282                 privmsg(b, target, "( %s ): %u updates, linking most recent", main_link, 1+updates);
 283         t = strdup(title);
 284         squash(t);
 285         privmsg(b, target, "( %s ): %s", link, t);
 286         free(t);
 287         return link;
 288 }
 289
 290 static const char *walk_rss(struct bio *b, const char *nick, const char *target, const char *url, xmlNode *root, const char *last_link)
 291 {
 292         const char *main_title = NULL, *main_link = NULL, *title = NULL, *link = NULL, *ver;
 293         char *t;
 294         xmlNode *cur, *entry = NULL;
 295         ver = get_link(root->properties, "version");
 296         if (!ver || strcmp(ver, "2.0")) {
 297                 if (!ver)
 298                         privmsg(b, target, "%s: Could not parse rss feed", nick);
 299                 else
 300                         privmsg(b, target, "%s: Invalid rss version \"%s\"", nick, ver);
 301                 return NULL;
 302         }
 303         for (cur = root->children; cur && cur->type != XML_ELEMENT_NODE; cur = cur->next);
 304         if (!cur)
 305                 return NULL;
 306         for (cur = cur->children; cur; cur = cur->next) {
 307                 const char *name = cur->name;
 308                 if (cur->type != XML_ELEMENT_NODE)
 309                         continue;
 310                 if (!strcasecmp(name, "title"))
 311                         main_title = get_text(cur->children);
 312                 else if (!strcasecmp(name, "link"))
 313                         main_link = main_link ? main_link : get_text(cur->children);
 314                 else if (!strcasecmp(name, "item"))
 315                         entry = entry ? entry : cur;
 316         }
 317         if (!main_link || !main_title) {
 318                 privmsg(b, target, "%s: Failed to parse main: %s %s", nick, main_link, main_title);
 319                 return NULL;
 320         }
 321         if (!entry)
 322                 return NULL;
 323
 324         link = title = NULL;
 325         for (cur = entry->children; cur; cur = cur->next) {
 326                 const char *name = cur->name;
 327                 if (cur->type != XML_ELEMENT_NODE)
 328                         continue;
 329                 if (!strcasecmp(name, "title"))
 330                         title = get_text(cur->children);
 331                 else if (!strcasecmp(name, "link"))
 332                         link = get_text(cur->children);
 333         }
 334         if (!title)
 335                 title = "<no title>";
 336         if (!link) {
 337                 privmsg(b, target, "%s: Failed to parse entry: %s %s", nick, link, title);
 338                 return NULL;
 339         }
 340         if (!last_link) {
 341                 t = strdup(title);
 342                 privmsg(b, target, "adding blog %s \"%s\"", main_link, main_title);
 343                 squash(t);
 344                 privmsg(b, target, "Most recent entry: %s %s", link, t);
 345                 free(t);
 346         } else if (strcmp(last_link, link)) {
 347                 int updates = 0;
 348                 const char *prev_title = NULL, *prev_link = NULL, *cur_title = NULL, *cur_link = NULL;
 349                 for (entry = entry->next; entry; entry = entry->next) {
 350                         if (strcasecmp(entry->name, "item"))
 351                                 continue;
 352                         prev_title = cur_title;
 353                         prev_link = cur_link;
 354                         cur_title = cur_link = NULL;
 355                         for (cur = entry->children; cur; cur = cur->next) {
 356                                 const char *name = cur->name;
 357                                 if (cur->type != XML_ELEMENT_NODE)
 358                                         continue;
 359                                 if (!strcasecmp(name, "title"))
 360                                         cur_title = get_text(cur->children);
 361                                 else if (!strcasecmp(name, "link"))
 362                                         cur_link = get_text(cur->children);
 363                         }
 364                         if (!cur_title)
 365                                 cur_title = "<no title>";
 366                         if (!cur_link || !strcmp(last_link, cur_link))
 367                                 break;
 368                         updates++;
 369                 }
 370                 if (updates == 1) {
 371                         t = strdup(prev_title);
 372                         squash(t);
 373                         privmsg(b, target, "( %s ): %s", prev_link, t);
 374                         free(t);
 375                 } else if (updates > 1)
 376                         privmsg(b, target, "( %s ): %u updates, linking most recent", main_link, 1+updates);
 377                 t = strdup(title);
 378                 squash(t);
 379                 privmsg(b, target, "( %s ): %s", link, t);
 380                 free(t);
 381         }
 382         return link;
 383 }
 384
 385 // HTML is a mess, so I'm just walking the tree depth first until I find the next element..
 386 static xmlNode *next_link(xmlNode *cur_node)
 387 {
 388         if (cur_node->children)
 389                 return cur_node->children;
 390         while (cur_node) {
 391                 if (cur_node->next)
 392                         return cur_node->next;
 393                 cur_node = cur_node->parent;
 394         }
 395         return NULL;
 396 }
 397
 398 static const char *get_atom_link(xmlNode *cur)
 399 {
 400         for (; cur; cur = next_link(cur)) {
 401                 if (cur->type != XML_ELEMENT_NODE)
 402                         continue;
 403                 if (!strcasecmp(cur->name, "link")) {
 404                         const char *isxml = get_link(cur->properties, "type");
 405                         if (isxml && !strcasecmp(isxml, "application/atom+xml"))
 406                                 return get_link(cur->properties, "href");
 407                 }
 408         }
 409         return NULL;
 410 }
 411
 412 static const char *get_rss_link(xmlNode *cur)
 413 {
 414         for (; cur; cur = next_link(cur)) {
 415                 if (cur->type != XML_ELEMENT_NODE)
 416                         continue;
 417                 if (!strcasecmp(cur->name, "link")) {
 418                         const char *isxml = get_link(cur->properties, "type");
 419                         if (isxml && !strcasecmp(isxml, "application/rss+xml"))
 420                                 return get_link(cur->properties, "href");
 421                 }
 422         }
 423         return NULL;
 424 }
 425
 426 static void do_html(struct bio *b, const char *nick, const char *target, const char *url, const char *data, unsigned len)
 427 {
 428         htmlDocPtr ctx = htmlReadMemory(data, len, 0, url, HTML_PARSE_RECOVER|HTML_PARSE_NOERROR|HTML_PARSE_NOWARNING);
 429         xmlNode *root = xmlDocGetRootElement(ctx);
 430         const char *link = get_atom_link(root);
 431         if (link)
 432                 privmsg(b, target, "%s: not a valid feed link, try atom: %s", nick, link);
 433         else if ((link = get_rss_link(root)))
 434                 privmsg(b, target, "%s: not a valid feed link, try rss: %s", nick, link);
 435         else
 436                 privmsg(b, target, "%s: not a valid feed link, no suggestion found", nick);
 437         xmlFreeDoc(ctx);
 438 }
 439
 440 static size_t get_time_from_header(void *data, size_t size, size_t size2, void *ptr)
 441 {
 442         char *d, *e;
 443         size *= size2;
 444         if (sstrncmp(data, "Last-Modified: "))
 445                 return size;
 446         data += sizeof("Last-Modified: ")-1;
 447         *(char**)ptr = d = strdup(data);
 448         if ((e = strchr(d, '\r')))
 449                 *e = 0;
 450         return size;
 451 }
 452
 453 static int check_single_feed(struct bio *b, const char *target, TDB_DATA key, const char *last_modified, const char *url, const char *link, const char *nick)
 454 {
 455         struct curl_download_context curl_ctx = {};
 456         struct curl_slist *headers = NULL;
 457         char error[CURL_ERROR_SIZE], *category = strchr(url, '#');
 458         int retval = -1;
 459         headers = curl_slist_append(headers, "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1");
 460         headers = curl_slist_append(headers, "Accept: */*");
 461         if (category)
 462                 *(category++) = 0;
 463
 464         CURL *h = curl_easy_init();
 465         curl_easy_setopt(h, CURLOPT_HTTPHEADER, headers);
 466         curl_easy_setopt(h, CURLOPT_URL, url);
 467         curl_easy_setopt(h, CURLOPT_WRITEFUNCTION, write_data);
 468         curl_easy_setopt(h, CURLOPT_WRITEDATA, &curl_ctx);
 469         curl_easy_setopt(h, CURLOPT_ERRORBUFFER, error);
 470         curl_easy_setopt(h, CURLOPT_FOLLOWLOCATION, 1);
 471         curl_easy_setopt(h, CURLOPT_MAXREDIRS, 3);
 472         curl_easy_setopt(h, CURLOPT_SSL_VERIFYPEER, 0);
 473         curl_easy_setopt(h, CURLOPT_TIMEOUT, 8);
 474         curl_easy_setopt(h, CURLOPT_CONNECTTIMEOUT, 8);
 475         curl_easy_setopt(h, CURLOPT_FILETIME, 1);
 476         curl_easy_setopt(h, CURLOPT_HEADERFUNCTION, get_time_from_header);
 477         curl_easy_setopt(h, CURLOPT_WRITEHEADER, &last_modified);
 478         //curl_easy_setopt(h, CURLOPT_VERBOSE, 1);
 479
 480         if (last_modified) {
 481                 char *tmp;
 482                 asprintf(&tmp, "If-Modified-Since: %s", last_modified);
 483                 headers = curl_slist_append(headers, tmp);
 484                 free(tmp);
 485         }
 486
 487         int success = curl_easy_perform(h);
 488         curl_slist_free_all(headers);
 489         if (success == CURLE_OK) {
 490                 char *mime = NULL;
 491                 long code;
 492                 curl_easy_getinfo(h, CURLINFO_CONTENT_TYPE, &mime);
 493                 curl_easy_getinfo(h, CURLINFO_RESPONSE_CODE, &code);
 494                 if (code == 304)
 495                         { }
 496                 else if (!mime || !sstrncmp(mime, "application/xml") || !sstrncmp(mime, "text/xml")) {
 497                         const char *ret_link = NULL;
 498                         xmlDocPtr ctx = xmlReadMemory(curl_ctx.data, curl_ctx.len, 0, url, XML_PARSE_NOWARNING | XML_PARSE_NOERROR);
 499                         xmlNode *root = xmlDocGetRootElement(ctx);
 500
 501                         if (!root || !root->name)
 502                                 fprintf(stderr, "Failed to parse feed %s %p", url, root);
 503                         else if (!strcasecmp(root->name, "feed"))
 504                                 ret_link = walk_feed(b, nick, target, url, category, root, link);
 505                         else if (!strcasecmp(root->name, "rss"))
 506                                 ret_link = walk_rss(b, nick, target, url, root, link);
 507                         else {
 508                                 privmsg(b, target, "Unknown feed type \"%s\"", root->name);
 509                                 goto free_ctx;
 510                         }
 511                         if (category)
 512                                 category[-1] = '#';
 513
 514                         if (ret_link && (!link || strcmp(ret_link, link))) {
 515                                 TDB_DATA val;
 516                                 asprintf((char**)&val.dptr, "%s\001%s", last_modified ? last_modified : "", ret_link);
 517                                 val.dsize = strlen(val.dptr)+1;
 518                                 if (tdb_store(feed_db, key, val, 0) < 0)
 519                                         privmsg(b, target, "updating returns %s", tdb_errorstr(feed_db));
 520                                 free(val.dptr);
 521                                 retval = 1;
 522                         }
 523                         else
 524                                 retval = 0;
 525
 526 free_ctx:
 527                         xmlFreeDoc(ctx);
 528                 } else if (link)
 529                         {}
 530                 else if (!sstrncmp(mime, "text/html") || !sstrncmp(mime, "application/xhtml+xml"))
 531                         do_html(b, nick, target, url, curl_ctx.data, curl_ctx.len);
 532                 else
 533                         privmsg(b, target, "unhandled content type %s", mime);
 534         } else if (!link)
 535                 privmsg(b, target, "Error %s (%u)", error, success);
 536
 537         free(curl_ctx.data);
 538         curl_easy_cleanup(h);
 539         return retval;
 540 }
 541
 542 static void command_follow(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 543 {
 544         char *space, *last_link = NULL;
 545         TDB_DATA key, val;
 546         int ret;
 547         if (!feed_db)
 548                 return;
 549         if (target[0] != '#') {
 550                 privmsg(b, target, "%s: Can only follow on channels", nick);
 551                 return;
 552         }
 553         if (!args || !*args) {
 554                 privmsg(b, target, "%s: Usage: !follow <url>", nick);
 555                 return;
 556         }
 557
 558         if (((space = strchr(args, ' ')) && space < strchr(args, '#')) ||
 559             (sstrncmp(args, "http://") && sstrncmp(args, "https://"))) {
 560                 privmsg(b, target, "%s: Invalid url", nick);
 561                 return;
 562         }
 563
 564         key.dsize = asprintf((char**)&key.dptr, "%s,%s", target, args)+1;
 565         val = tdb_fetch(feed_db, key);
 566         if (val.dptr)
 567                 last_link = strchr(val.dptr, '\001');
 568         ret = check_single_feed(b, target, key, NULL, args, last_link ? last_link+1 : NULL, nick);
 569         free(val.dptr);
 570         if (!ret)
 571                 privmsg(b, target, "%s: Not updated", nick);
 572         free(key.dptr);
 573 }
 574
 575 static void channel_feed_check(struct bio *b, const char *target, int64_t now)
 576 {
 577         int len = strlen(target);
 578         int64_t save[] = { now, 0, 0 };
 579
 580         TDB_DATA chan, res;
 581         if (!feed_db || !chan_db)
 582                 return;
 583         chan.dptr = (char*)target;
 584         chan.dsize = len+1;
 585         res = tdb_fetch(chan_db, chan);
 586         if (res.dptr && res.dsize >= 8) {
 587                 uint64_t then = *(uint64_t*)res.dptr;
 588                 if (now - then <= 8000)
 589                         return;
 590                 if (res.dsize >= 16)
 591                         save[1] = ((uint64_t*)res.dptr)[1];
 592                 if (res.dsize >= 24)
 593                         save[2] = ((uint64_t*)res.dptr)[2];
 594         }
 595         free(res.dptr);
 596         res.dptr = (unsigned char*)save;
 597         res.dsize = sizeof(save);
 598         if (tdb_store(chan_db, chan, res, 0) < 0) {
 599                 static int complain_db;
 600                 if (!complain_db++)
 601                         privmsg(b, target, "updating database: %s", tdb_errorstr(feed_db));
 602                 return;
 603         }
 604
 605         for (TDB_DATA d = tdb_firstkey(feed_db); d.dptr;) {
 606                 TDB_DATA f = tdb_fetch(feed_db, d);
 607                 TDB_DATA next = tdb_nextkey(feed_db, d);
 608
 609                 if (!strncmp(d.dptr, target, len) && d.dptr[len] == ',') {
 610                         const char *url = (char*)d.dptr + len + 1;
 611                         char *sep;
 612                         if ((sep = strchr(f.dptr, '\001'))) {
 613                                 *(sep++) = 0;
 614                                 check_single_feed(b, target, d, f.dptr, url, sep, target);
 615                         }
 616                 }
 617                 free(d.dptr);
 618                 free(f.dptr);
 619                 d = next;
 620         }
 621 }
 622
 623 static void command_unfollow(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 624 {
 625         TDB_DATA key;
 626         char *url;
 627
 628         if (!feed_db)
 629                 return;
 630
 631         if (!(url = token(&args, ' ')) || (sstrncmp(url, "http://") && sstrncmp(url, "https://"))) {
 632                 privmsg(b, target, "%s: Invalid url", nick);
 633                 return;
 634         }
 635         if (target[0] != '#') {
 636                 privmsg(b, target, "%s: Can only unfollow on channels", nick);
 637                 return;
 638         }
 639         key.dsize = asprintf((char**)&key.dptr, "%s,%s", target, url)+1;
 640         if (tdb_delete(feed_db, key) < 0) {
 641                 if (tdb_error(feed_db) == TDB_ERR_NOEXIST)
 642                         privmsg(b, target, "%s: Not following %s on this channel", nick, url);
 643                 else
 644                         privmsg(b, target, "%s: Could not delete: %s", nick, tdb_errorstr(feed_db));
 645         } else
 646                 privmsg(b, target, "%s: No longer following %s", nick, url);
 647         free(key.dptr);
 648 }
 649
 650 static void command_g(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 651 {
 652         int ret = 0;
 653         int64_t g = 0, g_total = 0;
 654         TDB_DATA chan, res;
 655
 656         if (!chan_db || target[0] != '#')
 657                 return;
 658
 659         chan.dptr = (char*)target;
 660         chan.dsize = strlen(chan.dptr)+1;
 661         res = tdb_fetch(chan_db, chan);
 662         if (res.dptr && res.dsize >= 16) {
 663                 g = ((int64_t*)res.dptr)[1];
 664                 ((int64_t*)res.dptr)[1] = 0;
 665                 if (res.dsize >= 24)
 666                         g_total = ((int64_t*)res.dptr)[2];
 667                 ret = tdb_store(chan_db, chan, res, 0);
 668         }
 669         free(res.dptr);
 670         if (ret < 0)
 671                 fprintf(stderr, "updating database: %s", tdb_errorstr(feed_db));
 672         else
 673                 privmsg(b, target, "%s: %"PRIi64" g's since last check, %"PRIi64" total", nick, g, g_total);
 674 }
 675
 676 static void command_feeds(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 677 {
 678         int len = strlen(target), found = 0;
 679         if (!feed_db)
 680                 return;
 681         if (target[0] != '#') {
 682                 privmsg(b, target, "%s: Only useful in channels..", nick);
 683                 return;
 684         }
 685         for (TDB_DATA d = tdb_firstkey(feed_db); d.dptr;) {
 686                 TDB_DATA f = tdb_fetch(feed_db, d);
 687                 TDB_DATA next = tdb_nextkey(feed_db, d);
 688
 689                 if (!strncmp(d.dptr, target, len) && d.dptr[len] == ',') {
 690                         privmsg(b, target, "%s: following %s", nick, d.dptr + len + 1);
 691                         found++;
 692                 }
 693                 free(d.dptr);
 694                 free(f.dptr);
 695                 d = next;
 696         }
 697         if (!found)
 698                 privmsg(b, target, "%s: not following any feed on %s", nick, target);
 699 }
 700
 701 static void command_feed_get(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 702 {
 703         if (!feed_db)
 704                 return;
 705         for (TDB_DATA d = tdb_firstkey(feed_db); d.dptr;) {
 706                 TDB_DATA next = tdb_nextkey(feed_db, d);
 707                 if (!args || strcasestr(d.dptr, args)) {
 708                         TDB_DATA f = tdb_fetch(feed_db, d);
 709                         privmsg(b, target, "%s: %s = %s", nick, d.dptr, f.dptr);
 710                         free(f.dptr);
 711                 }
 712                 if (strlen(d.dptr)+1 < d.dsize) {
 713                         privmsg(b, target, "%s: removed buggy entry", nick);
 714                         tdb_delete(feed_db, d);
 715                 }
 716                 free(d.dptr);
 717                 d = next;
 718         }
 719 }
 720
 721 static void command_feed_set(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 722 {
 723         if (!feed_db)
 724                 return;
 725         TDB_DATA key, val;
 726         key.dptr = token(&args, ' ');
 727         char *value = token(&args, ' ');
 728         if (!key.dptr || !value)
 729                 return;
 730         key.dsize = strlen(key.dptr) + 1;
 731         val.dsize = strlen(value) + 2;
 732         val.dptr = malloc(val.dsize);
 733         strcpy(val.dptr+1, value);
 734         val.dptr[0] = '\001';
 735         if (tdb_store(feed_db, key, val, 0) < 0)
 736                 privmsg(b, target, "%s: setting failed: %s", nick, tdb_errorstr(feed_db));
 737         else
 738                 privmsg(b, target, "%s: burp", nick);
 739         free(val.dptr);
 740 }
 741
 742 static void command_feed_rem(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 743 {
 744         if (!feed_db || !args)
 745                 return;
 746         TDB_DATA key = { .dptr = (unsigned char*)args, .dsize = strlen(args)+1 };
 747         if (tdb_delete(feed_db, key) < 0)
 748                 privmsg(b, target, "%s: removing failed: %s", nick, tdb_errorstr(feed_db));
 749         else
 750                 privmsg(b, target, "%s: burp", nick);
 751 }
 752
 753 static void command_feed_xxx(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 754 {
 755         if (!feed_db)
 756                 return;
 757
 758         tdb_wipe_all(feed_db);
 759         privmsg(b, target, "%s: all evidence erased", nick);
 760 }
 761
 762 static void command_seen_xxx(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 763 {
 764         if (!seen_db)
 765                 return;
 766
 767         tdb_wipe_all(seen_db);
 768         privmsg(b, target, "%s: all evidence erased", nick);
 769 }
 770
 771 static void command_feed_counter(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 772 {
 773         if (!chan_db)
 774                 return;
 775         tdb_wipe_all(chan_db);
 776         privmsg(b, target, "%s: All update counters reset", nick);
 777 }
 778
 779 static char *get_text_appended(xmlNode *cur)
 780 {
 781         for (; cur; cur = cur->next) {
 782                 if (cur->type != XML_TEXT_NODE)
 783                         continue;
 784                 return strdup(cur->content);
 785         }
 786         return NULL;
 787 }
 788
 789 static char *get_title(struct bio *b, xmlNode *cur_node)
 790 {
 791         for (; cur_node; cur_node = next_link(cur_node)) {
 792                 if (cur_node->type == XML_ELEMENT_NODE && !strcasecmp(cur_node->name, "title")) {
 793                         if (!cur_node->children)
 794                                 return NULL;
 795                         return get_text_appended(cur_node->children);
 796                 }
 797         }
 798         return NULL;
 799 }
 800
 801 static void internal_link(struct bio *b, const char *nick, const char *host, const char *target, char *args, unsigned verbose)
 802 {
 803         CURL *h;
 804         struct curl_slist *headers = NULL;
 805         char error[CURL_ERROR_SIZE];
 806         int success, sent = verbose;
 807         struct curl_download_context curl_ctx = {};
 808
 809         if (!args)
 810                 return;
 811         int64_t stop, start = get_time(b, target);
 812
 813         h = curl_easy_init();
 814         headers = curl_slist_append(headers, "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1");
 815         headers = curl_slist_append(headers, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
 816         headers = curl_slist_append(headers, "Accept-Language: en-us,en;q=0.7");
 817         headers = curl_slist_append(headers, "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7");
 818         headers = curl_slist_append(headers, "DNT: 1");
 819         headers = curl_slist_append(headers, "Connection: keep-alive");
 820         curl_easy_setopt(h, CURLOPT_HTTPHEADER, headers);
 821         curl_easy_setopt(h, CURLOPT_URL, args);
 822         curl_easy_setopt(h, CURLOPT_WRITEFUNCTION, write_data);
 823         curl_easy_setopt(h, CURLOPT_WRITEDATA, &curl_ctx);
 824         curl_easy_setopt(h, CURLOPT_ERRORBUFFER, error);
 825         curl_easy_setopt(h, CURLOPT_FOLLOWLOCATION, 1);
 826         curl_easy_setopt(h, CURLOPT_MAXREDIRS, 3);
 827         curl_easy_setopt(h, CURLOPT_SSL_VERIFYPEER, 0);
 828         curl_easy_setopt(h, CURLOPT_TIMEOUT, 8);
 829         curl_easy_setopt(h, CURLOPT_CONNECTTIMEOUT, 8);
 830         //curl_easy_setopt(h, CURLOPT_VERBOSE, 1);
 831         success = curl_easy_perform(h);
 832         curl_easy_cleanup(h);
 833         curl_slist_free_all(headers);
 834         if (success == CURLE_OK) {
 835                 magic_t m = magic_open(MAGIC_MIME_TYPE);
 836                 magic_load(m, NULL);
 837                 const char *mime = magic_buffer(m, curl_ctx.data, curl_ctx.len);
 838                 if (strstr(mime, "text/html") || strstr(mime, "application/xml") || strstr(mime, "application/xhtml+xml")) {
 839                         htmlDocPtr ctx = htmlReadMemory(curl_ctx.data, curl_ctx.len, 0, args, HTML_PARSE_RECOVER|HTML_PARSE_NOERROR|HTML_PARSE_NOWARNING);
 840                         xmlNode *root_element = xmlDocGetRootElement(ctx);
 841                         char *title = get_title(b, root_element);
 842                         if (title) {
 843                                 char *nuke;
 844                                 squash(title);
 845                                 decode_html_entities_utf8(title, NULL);
 846                                 if ((nuke = strstr(title, " on SoundCloud - Create")))
 847                                         *nuke = 0;
 848                                 if (*title) {
 849                                         privmsg(b, target, "%s linked %s", nick, title);
 850                                         sent = 1;
 851                                 }
 852                                 free(title);
 853                         }
 854                         if (verbose && !title)
 855                                 privmsg(b, target, "%s linked %s page with invalid title", nick, mime);
 856                         xmlFreeDoc(ctx);
 857                 } else if (verbose) {
 858                         magic_setflags(m, MAGIC_COMPRESS);
 859                         const char *desc = magic_buffer(m, curl_ctx.data, curl_ctx.len);
 860                         privmsg(b, target, "%s linked type %s", nick, desc);
 861                 }
 862                 magic_close(m);
 863         }
 864         if (verbose && success != CURLE_OK)
 865                 privmsg(b, target, "Error %s (%u)", error, success);
 866         else if (!sent && (stop = get_time(b, target)) - start >= 15) {
 867                 privmsg(b, target, "Link (%s) by %s timed out, disabling links for 10 seconds", args, nick);
 868                 commands[strhash("get") % elements(commands)].disabled_until = stop + 10;
 869         }
 870         free(curl_ctx.data);
 871 }
 872
 873 static void command_get(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 874 {
 875         if (!args || (sstrncmp(args, "http://") && sstrncmp(args, "https://")))
 876                 return;
 877         internal_link(b, nick, host, target, token(&args, ' '), 1);
 878 }
 879
 880 static void command_fabric(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 881 {
 882         privmsg(b, target, "Dumb fabric!");
 883 }
 884
 885 static void command_admire(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 886 {
 887         char *arg = token(&args, ' ');
 888         privmsg(b, target, "%s: I really like your mane!", arg ? arg : nick);
 889 }
 890
 891 static void command_hugs(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 892 {
 893         action(b, target, "gives a lunar hug to %s", args ? args : nick);
 894 }
 895
 896 static void command_hug(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 897 {
 898         if ((host && !strcmp(host, "life.on.the.moon.is.great.I.know.all.about.it")) ||
 899             (args && !sstrncasecmp(args, "lu")))
 900                 command_hugs(b, nick, host, target, args);
 901         else
 902                 action(b, target, "gives a robotic hug to %s", args ? args : nick);
 903 }
 904
 905 static void command_snuggles(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 906 {
 907         action(b, target, "gives a lunar snuggle to %s", args ? args : nick);
 908 }
 909
 910 static void command_snuggle(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 911 {
 912         if ((host && !strcmp(host, "life.on.the.moon.is.great.I.know.all.about.it")) ||
 913             (args && !sstrncasecmp(args, "lu")))
 914                 command_snuggles(b, nick, host, target, args);
 915         else
 916                 action(b, target, "gives a robotic snuggle to %s", args ? args : nick);
 917 }
 918
 919 static void command_cuddles(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 920 {
 921         action(b, target, "gives cuddles to %s in a lunaresque way", args ? args : nick);
 922 }
 923
 924 static void command_cuddle(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 925 {
 926         if ((host && !strcmp(host, "life.on.the.moon.is.great.I.know.all.about.it")) ||
 927             (args && !sstrncasecmp(args, "lu")))
 928                 command_cuddles(b, nick, host, target, args);
 929         else
 930                 action(b, target, "gives cuddles to %s in a robotic way", args ? args : nick);
 931 }
 932
 933
 934 static void command_cookie(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 935 {
 936         if (args && !strncasecmp(args, nick_self, strlen(nick_self)))
 937                 action(b, target, "eats the cookie offered by %s", nick);
 938         else
 939                 action(b, target, "hands a metallic looking cookie to %s", args ? args : nick);
 940 }
 941
 942 static void command_derpy(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 943 {
 944         static const char *insults[] = {
 945                 "accidentally shocks herself",
 946                 "tumbles down the stairs like a slinky",
 947                 "whirrrs and clicks in a screeching way",
 948                 "had problems executing this command",
 949                 "breaks down entirely",
 950                 "uses her magic to levitate herself off the ground, then hits it face first"
 951         };
 952         action(b, target, "%s", insults[getrand() % elements(insults)]);
 953 }
 954
 955 static void command_inspect(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 956 {
 957         struct command_hash *c;
 958         unsigned leave, crash;
 959         char *cmd;
 960         if (!args || !(cmd = token(&args, ' ')))
 961                 return;
 962
 963         if (strcmp(cmd, "#")) {
 964                 c = &commands[strhash(cmd) % elements(commands)];
 965                 if (!c->string || strcasecmp(c->string, cmd)) {
 966                         privmsg(b, target, "Command %s not valid", cmd);
 967                         return;
 968                 }
 969         } else
 970                 c = &command_channel;
 971
 972         leave = c->left + (c->cmd == command_inspect);
 973         crash = c->enter - leave;
 974         if (c->enter != leave)
 975                 privmsg(b, target, "%s: %u successes and %u crash%s, last crashing command: %s", c->string, leave, crash, crash == 1 ? "" : "es", c->failed_command);
 976         else
 977                 privmsg(b, target, "%s: %u time%s executed succesfully", c->string, leave, leave == 1 ? "" : "s");
 978 }
 979
 980 static void command_rebuild(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 981 {
 982         int ret;
 983         char *make[] = { "/usr/bin/make", "-j4", NULL };
 984         char *git_reset[] = { "/usr/bin/git", "reset", "--hard", "master", NULL };
 985         ret = pipe_command(b, target, nick, 0, 1, git_reset);
 986         if (ret) {
 987                 action(b, target, "could not rebuild");
 988                 return;
 989         }
 990         ret = pipe_command(b, target, nick, 0, 1, make);
 991         if (!ret)
 992                 kill(getpid(), SIGUSR1);
 993         else if (ret > 0)
 994                 action(b, target, "displays an ominous %i", ret);
 995 }
 996
 997 static void command_swear(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 998 {
 999         static const char *insults[] = {
1000                 "featherbrain",
1001                 "ponyfeathers",
1002                 "What in the hey?",
1003                 "What are you, a dictionary?",
1004                 "TAR-DY!",
1005                 "[BUY SOME APPLES]",
1006                 "{ Your lack of bloodlust on the battlefield is proof positive that you are a soulless automaton! }",
1007                 "Your royal snootiness"
1008         };
1009         privmsg(b, target, "%s: %s", args ? args : nick, insults[getrand() % elements(insults)]);
1010 }
1011
1012 static const char *perty(int64_t *t)
1013 {
1014         if (*t >= 14 * 24 * 3600) {
1015                 *t /= 7 * 24 * 3600;
1016                 return "weeks";
1017         } else if (*t >= 48 * 3600) {
1018                 *t /= 24 * 3600;
1019                 return "days";
1020         } else if (*t >= 7200) {
1021                 *t /= 3600;
1022                 return "hours";
1023         } else if (*t >= 120) {
1024                 *t /= 60;
1025                 return "minutes";
1026         }
1027         return *t == 1 ? "second" : "seconds";
1028 }
1029
1030 static void command_timeout(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1031 {
1032         struct command_hash *c;
1033         int64_t t = get_time(b, target);
1034         int64_t howlong;
1035         if (t < 0)
1036                 return;
1037         char *arg = token(&args, ' ');
1038         if (!arg || !args || !(howlong = atoi(args))) {
1039                 action(b, target, "pretends to time out");;
1040                 return;
1041         }
1042         c = &commands[strhash(arg) % elements(commands)];
1043         if (c->string && !strcasecmp(c->string, arg)) {
1044                 c->disabled_until = t + howlong;
1045                 const char *str = perty(&howlong);
1046                 action(b, target, "disables %s for %"PRIi64" %s", arg, howlong, str);
1047         } else
1048                 action(b, target, "clicks sadly at %s for not being able to find that command", nick);
1049 }
1050
1051 static void command_mfw(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1052 {
1053         char error[CURL_ERROR_SIZE], *new_url;
1054         CURL *h = curl_easy_init();
1055         struct curl_slist *headers = NULL;
1056         struct curl_download_context curl_ctx = {};
1057         headers = curl_slist_append(headers, "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1");
1058         headers = curl_slist_append(headers, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
1059         headers = curl_slist_append(headers, "Accept-Language: en-us,en;q=0.7");
1060         headers = curl_slist_append(headers, "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7");
1061         headers = curl_slist_append(headers, "DNT: 1");
1062         headers = curl_slist_append(headers, "Connection: keep-alive");
1063         curl_easy_setopt(h, CURLOPT_HTTPHEADER, headers);
1064         curl_easy_setopt(h, CURLOPT_URL, "http://mylittlefacewhen.com/random/");
1065         curl_easy_setopt(h, CURLOPT_WRITEFUNCTION, write_data);
1066         curl_easy_setopt(h, CURLOPT_WRITEDATA, &curl_ctx);
1067         curl_easy_setopt(h, CURLOPT_ERRORBUFFER, error);
1068         curl_easy_setopt(h, CURLOPT_TIMEOUT, 8);
1069         curl_easy_setopt(h, CURLOPT_CONNECTTIMEOUT, 8);
1070         //curl_easy_setopt(h, CURLOPT_VERBOSE, 1);
1071         CURLcode ret = curl_easy_perform(h);
1072         if (ret == CURLE_OK && curl_easy_getinfo(h, CURLINFO_REDIRECT_URL, &new_url) == CURLE_OK)
1073                 privmsg(b, target, "%s: %s", nick, new_url);
1074         curl_slist_free_all(headers);
1075         curl_easy_cleanup(h);
1076         if (ret != CURLE_OK)
1077                 privmsg(b, target, "%s: You have no face", nick);
1078 }
1079
1080 static TDB_DATA get_mail_key(const char *nick)
1081 {
1082         TDB_DATA d;
1083         int i;
1084         d.dsize = strlen(nick)+1;
1085         d.dptr = malloc(d.dsize);
1086         for (i = 0; i < d.dsize - 1; ++i)
1087                 d.dptr[i] = tolower(nick[i]);
1088         d.dptr[i] = 0;
1089         return d;
1090 }
1091
1092 static void command_mail(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1093 {
1094         char *victim, *x = NULL;
1095         size_t len;
1096         int override = 0;
1097         int64_t last_seen = 0;
1098
1099         if (!mail_db || !seen_db)
1100                 return;
1101         TDB_DATA key, val;
1102         victim = token(&args, ' ');
1103         if (victim && !strcasecmp(victim, "-seen")) {
1104                 victim = token(&args, ' ');
1105                 override = 1;
1106         }
1107         if (!victim || !args || victim[0] == '#' || strchr(victim, '@') || strchr(victim, '.')) {
1108                 privmsg(b, target, "%s: Usage: !mail <nick> <message>", nick);
1109                 return;
1110         }
1111         if (!strcasecmp(victim, nick_self)) {
1112                 action(b, target, "whirrs and clicks excitedly at the mail she received from %s", nick);
1113                 return;
1114         }
1115         if (!strcasecmp(victim, nick)) {
1116                 action(b, target, "echos the words from %s back to them: %s", nick, args);
1117                 return;
1118         }
1119         int64_t now = get_time(b, target);
1120         if (now < 0)
1121                 return;
1122
1123         key = get_mail_key(victim);
1124         val = tdb_fetch(seen_db, key);
1125         if (val.dptr && (x = strchr(val.dptr, ','))) {
1126                 *(x++) = 0;
1127                 last_seen = atoll(val.dptr);
1128         }
1129         if (x && !admin(host) && (now - last_seen) < 300 && (!sstrncasecmp(x, "in ") || !sstrncasecmp(x, "joining "))) {
1130                 action(b, target, "would rather not store mail for someone active so recently");
1131                         goto out;
1132         } else if (last_seen && now - last_seen > 14 * 24 * 3600 && !override) {
1133                 int64_t delta = now - last_seen;
1134                 const char *str = perty(&delta);
1135                 privmsg(b, target, "%s: \"%s\" was last seen %"PRIi64" %s ago, use !mail -seen %s <message> to override this check.", nick, victim, delta, str, victim);
1136                 return;
1137         } else if (!x && !override) {
1138                 privmsg(b, target, "%s: I've never seen \"%s\", use !mail -seen %s <message> to override this check.", nick, victim, victim);
1139                 return;
1140         }
1141
1142         val = tdb_fetch(mail_db, key);
1143         if (!val.dptr)
1144                 val.dsize = 0;
1145         else {
1146                 unsigned char *cur;
1147                 int letters = 0;
1148                 for (cur = val.dptr; cur < val.dptr + val.dsize; cur += strlen(cur)+1)
1149                         letters++;
1150                 if (letters >= 6) {
1151                         action(b, target, "looks sadly at %s as she cannot hold any more mail to %s", nick, victim);
1152                         goto out;
1153                 }
1154         }
1155         len = snprintf(NULL, 0, "%"PRIi64 ",%s: %s", now, nick, args) + 1;
1156         val.dptr = realloc(val.dptr, val.dsize + len);
1157         snprintf(val.dptr + val.dsize, len, "%"PRIi64 ",%s: %s", now, nick, args);
1158         val.dsize += len;
1159         if (tdb_store(mail_db, key, val, 0) < 0)
1160                 privmsg(b, target, "%s: updating mail returns %s", nick, tdb_errorstr(mail_db));
1161         else
1162                 action(b, target, "whirrs and clicks at %s as she stores the mail for %s", nick, victim);
1163 out:
1164         free(val.dptr);
1165         free(key.dptr);
1166 }
1167
1168 static void single_message(struct bio *b, const char *target, char *cur, int64_t now)
1169 {
1170         char *endtime, *sep = strchr(cur, ':');
1171         int64_t delta = -1;
1172         if (sep && (endtime = strchr(cur, ',')) && endtime < sep) {
1173                 int64_t t = atoll(cur);
1174                 if (t > 0)
1175                         delta = now - t;
1176                 cur = endtime + 1;
1177         }
1178         if (delta >= 0) {
1179                 const char *str = perty(&delta);
1180                 privmsg(b, target, "%"PRIi64" %s ago from %s", delta, str, cur);
1181         } else
1182                 privmsg(b, target, "From %s", cur);
1183 }
1184
1185 static void command_deliver(struct bio *b, const char *nick, const char *target)
1186 {
1187         TDB_DATA key, val;
1188         unsigned char *cur;
1189         static unsigned mail_enter, mail_leave;
1190         if (mail_enter++ != mail_leave)
1191                 return;
1192
1193         if (!mail_db)
1194                 return;
1195         key = get_mail_key(nick);
1196         val = tdb_fetch(mail_db, key);
1197         if (!val.dptr)
1198                 goto end;
1199         int64_t now = get_time(b, NULL);
1200         if (strcasecmp(key.dptr, nick_self)) {
1201                 privmsg(b, target, "%s: You've got mail!", nick);
1202                 for (cur = val.dptr; cur < val.dptr + val.dsize; cur += strlen(cur)+1)
1203                         single_message(b, target, cur, now);
1204         }
1205         free(val.dptr);
1206         tdb_delete(mail_db, key);
1207 end:
1208         free(key.dptr);
1209         mail_leave++;
1210 }
1211
1212 static void update_seen(struct bio *b, char *doingwhat, const char *nick)
1213 {
1214         TDB_DATA key;
1215         key = get_mail_key(nick);
1216         TDB_DATA val = { .dptr = doingwhat, .dsize = strlen(doingwhat)+1 };
1217         if (seen_db)
1218                 tdb_store(seen_db, key, val, 0);
1219         free(key.dptr);
1220 }
1221
1222 static void command_seen(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1223 {
1224         char *arg = token(&args, ' '), *x;
1225         int64_t now = get_time(b, target);
1226         TDB_DATA key, val;
1227         if (now < 0)
1228                 return;
1229         if (!seen_db || !arg) {
1230                 privmsg(b, target, "%s: { Error... }", nick);
1231                 return;
1232         }
1233         if (!strcasecmp(arg, nick_self)) {
1234                 action(b, target, "whirrs and clicks at %s", nick);
1235                 return;
1236         }
1237         if (!strcasecmp(arg, nick)) {
1238                 action(b, target, "circles around %s dancing", nick);
1239                 return;
1240         }
1241         key = get_mail_key(arg);
1242         val = tdb_fetch(seen_db, key);
1243         if (val.dptr && (x = strchr(val.dptr, ','))) {
1244                 int64_t delta;
1245                 const char *str;
1246                 *(x++) = 0;
1247                 delta = now - atoll(val.dptr);
1248                 str = perty(&delta);
1249                 if (delta < 0)
1250                         privmsg(b, target, "%s was last seen in the future %s", arg, x);
1251                 else
1252                         privmsg(b, target, "%s was last seen %"PRIi64" %s ago %s", arg, delta, str, x);
1253         } else
1254                 action(b, target, "cannot find any evidence that %s exists", arg);
1255         free(val.dptr);
1256 }
1257
1258 static void command_mailbag(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1259 {
1260         char buffer[256];
1261         unsigned rem = sizeof(buffer)-1, first = 2;
1262         if (!mail_db)
1263                 return;
1264         buffer[rem] = 0;
1265
1266         for (TDB_DATA f = tdb_firstkey(mail_db); f.dptr;) {
1267                 if (f.dsize + 4 > rem) {
1268                         privmsg(b, target, "%s: Holding mail for: %s", nick, &buffer[rem]);
1269                         first = 2;
1270                         rem = sizeof(buffer)-1;
1271                         assert(f.dsize + 4 < rem);
1272                 }
1273                 if (f.dptr) {
1274                         if (first == 2) {
1275                                 first = 1;
1276                         } else if (first) {
1277                                 rem -= 5;
1278                                 memcpy(&buffer[rem], " and ", 5);
1279                                 first = 0;
1280                         } else {
1281                                 rem -= 2;
1282                                 memcpy(&buffer[rem], ", ", 2);
1283                         }
1284                         rem -= f.dsize - 1;
1285                         memcpy(&buffer[rem], f.dptr, f.dsize - 1);
1286                 }
1287                 TDB_DATA next = tdb_nextkey(mail_db, f);
1288                 free(f.dptr);
1289                 f = next;
1290         }
1291         if (first < 2)
1292                 privmsg(b, target, "%s: Holding mail for: %s", nick, &buffer[rem]);
1293 }
1294
1295 static void command_mailread(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1296 {
1297         TDB_DATA key, val;
1298         char *victim;
1299         if (!mail_db || !(victim = token(&args, ' ')))
1300                 return;
1301         key = get_mail_key(victim);
1302         val = tdb_fetch(mail_db, key);
1303         if (!val.dptr)
1304                 action(b, target, "ponyshrugs as no mail for %s was found", victim);
1305         else {
1306                 unsigned char *cur;
1307                 int64_t now = get_time(b, NULL);
1308                 action(b, target, "peeks through %s's mail", victim);
1309                 for (cur = val.dptr; cur < val.dptr + val.dsize; cur += strlen(cur)+1)
1310                         single_message(b, target, cur, now);
1311         }
1312         free(val.dptr);
1313         free(key.dptr);
1314 }
1315
1316 static void command_no_deliver(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1317 {
1318         TDB_DATA key, val;
1319         char *cur;
1320         if (!mail_db || !(cur = token(&args, ' ')))
1321                 return;
1322         key = get_mail_key(cur);
1323         val = tdb_fetch(mail_db, key);
1324         if (!val.dptr)
1325                 action(b, target, "ponyshrugs as no mail for %s was found", cur);
1326         else {
1327                 action(b, target, "deletes all evidence of %s's mail", cur);
1328                 tdb_delete(mail_db, key);
1329         }
1330         free(val.dptr);
1331         free(key.dptr);
1332 }
1333
1334 static void perform_roll(struct bio *b, const char *nick, const char *target, long sides, long dice, long bonus)
1335 {
1336         long rem = dice, total = bonus;
1337         while (rem--)
1338                 total += 1 + (getrand() % sides);
1339         if (bonus)
1340                 action(b, target, "rolls %li %li-sided %s for a total of %li (%+li)", dice, sides, dice == 1 ? "die" : "dice", total, bonus);
1341         else
1342                 action(b, target, "rolls %li %li-sided %s for a total of %li", dice, sides, dice == 1 ? "die" : "dice", total);
1343 }
1344
1345 static void command_roll(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1346 {
1347         char *cur;
1348         long dice = 1, sides = 20;
1349         if ((cur = token(&args, ' '))) {
1350                 char *first = cur;
1351                 dice = strtol(first, &cur, 10);
1352                 if (first == cur)
1353                         dice = 1;
1354                 if (*cur && *cur != 'd' && *cur != 'D')
1355                         goto syntax;
1356
1357                 if (*cur) {
1358                         char *last = cur+1;
1359                         sides = strtol(last, &cur, 10);
1360                         if (last == cur)
1361                                 goto syntax;
1362                 }
1363         }
1364         if (dice <= 0 || dice > 10 || sides < 2 || sides > 20)
1365                 goto syntax;
1366         perform_roll(b, nick, target, sides, dice, 0);
1367         return;
1368
1369 syntax:
1370         action(b, target, "bleeps at %s in a confused manner", nick);
1371 }
1372
1373 static void add_g(struct bio *b, const char *target, int g)
1374 {
1375         int ret = 0;
1376         int64_t total_g = 0;
1377         TDB_DATA chan, res;
1378
1379         if (!chan_db || target[0] != '#')
1380                 return;
1381
1382         chan.dptr = (char*)target;
1383         chan.dsize = strlen(chan.dptr)+1;
1384         res = tdb_fetch(chan_db, chan);
1385         if (res.dptr && res.dsize >= 16) {
1386                 ((int64_t*)res.dptr)[1] += g;
1387                 if (res.dsize >= 24)
1388                         total_g = ((int64_t*)res.dptr)[2] += g;
1389                 ret = tdb_store(chan_db, chan, res, 0);
1390         }
1391         free(res.dptr);
1392         if (ret < 0)
1393                 fprintf(stderr, "updating database: %s", tdb_errorstr(feed_db));
1394         else if (g < total_g) {
1395                 int64_t last_g = total_g - g;
1396                 last_g -= last_g % 1000;
1397                 if (last_g + 1000 <= total_g)
1398                         privmsg(b, target, "g has been said %"PRIi64" times!", total_g);
1399         }
1400 }
1401
1402 static int parse_g(const char *cur, int *g)
1403 {
1404         int this_g = 0;
1405         for (const unsigned char *ptr = cur; *ptr; ptr++) {
1406                 if (*ptr >= 0x80)
1407                         return 0;
1408                 if (*ptr == 'g' || *ptr == 'G')
1409                         this_g++;
1410                 else if ((*ptr >= 'a' && *ptr <= 'z') || (*ptr >= 'A' && *ptr <= 'Z'))
1411                         return 0;
1412                 else if (*ptr != '1' && *ptr >= '0' && *ptr <= '9')
1413                         return 0;
1414         }
1415         *g += this_g;
1416         return this_g;
1417 }
1418
1419 static void channel_msg(struct bio *b, const char *nick, const char *host,
1420                         const char *chan, char *msg, int64_t t)
1421 {
1422         char *cur = NULL, *next;
1423         int is_action = 0;
1424         int g = 0;
1425
1426         int that = 0, what = 0, she = 0;
1427
1428         if (!msg || !strcmp(nick, "`Daring_Do`") ||
1429             !sstrncmp(nick, "derpy") || !sstrncmp(nick, "`derpy") ||
1430             !sstrncmp(nick, "`Luna") || !sstrncmp(nick, "`Celestia") ||
1431             !sstrncmp(nick, "GitHub") || !sstrncmp(nick, "CIA-") ||
1432             !sstrncmp(nick, "Termi") || !strcmp(nick, "r0m"))
1433                 return;
1434
1435         if (!sstrncasecmp(msg, "\001ACTION ")) {
1436                 msg += sizeof("\001ACTION ")-1;
1437                 is_action = 1;
1438                 asprintf(&cur, "%"PRIi64 ",in %s: * %s %s", t, chan, nick, msg);
1439         } else
1440                 asprintf(&cur, "%"PRIi64 ",in %s: <%s> %s", t, chan, nick, msg);
1441         if (t > 0 && strcasecmp(chan, "#themoon") && strcasecmp(chan, "#fluttertreehouse"))
1442                 update_seen(b, cur, nick);
1443         free(cur);
1444         (void)is_action;
1445
1446         next = msg;
1447         while ((cur = token(&next, ' '))) {
1448                 if (!strcasecmp(cur, ">mfw") || !strcasecmp(cur, "mfw")) {
1449                         if (!strcasecmp(chan, "#brony") || !ponify)
1450                                 continue;
1451                         if (t < 0 || t > commands[strhash("mfw") % elements(commands)].disabled_until)
1452                                 command_mfw(b, nick, host, chan, NULL);
1453                         return;
1454                 } else if (!sstrncasecmp(cur, "http://") || !sstrncasecmp(cur, "https://")) {
1455                         static char last_url[512];
1456                         char *part;
1457                         if (!strcmp(cur, last_url))
1458                                 return;
1459                         strncpy(last_url, cur, sizeof(last_url)-1);
1460
1461                         if (!sstrncmp(nick, "EqBot") || !sstrncasecmp(chan, "#mlpsurvival"))
1462                                 return;
1463
1464                         if (t >= 0 && t < commands[strhash("get") % elements(commands)].disabled_until)
1465                                 return;
1466
1467                         else if (strcasestr(cur, "youtube.com/user") && (part = strstr(cur, "#p/"))) {
1468                                 char *foo;
1469                                 part = strrchr(part, '/') + 1;
1470                                 asprintf(&foo, "http://youtube.com/watch?v=%s", part);
1471                                 if (foo)
1472                                         internal_link(b, nick, host, chan, foo, 0);
1473                                 free(foo);
1474                                 return;
1475                         } else if (strcasestr(cur, "twitter.com/") || strcasestr(cur, "mlfw.info") || strcasestr(cur, "mylittlefacewhen.com") || !strcasecmp(chan, "#geek"))
1476                                 return;
1477                         internal_link(b, nick, host, chan, cur, 0);
1478                         return;
1479                 }
1480                 else if (!sstrncasecmp(cur, "that") || !sstrncasecmp(cur, "dat"))
1481                         that = 1;
1482                 else if (that && (!sstrncasecmp(cur, "what") || !sstrncasecmp(cur, "wat")))
1483                         what = 1;
1484                 else if (what && !sstrncasecmp(cur, "she"))
1485                         she = 1;
1486                 else if (she && !sstrncasecmp(cur, "said")) {
1487                         if (t <= 0 || t >= commands[strhash("shesaid") % elements(commands)].disabled_until)
1488                                 privmsg(b, chan, "%s: \"%s\"", nick, women_quotes[getrand() % elements(women_quotes)]);
1489                         return;
1490                 } else if (parse_g(cur, &g))
1491                         continue;
1492         }
1493         if (g)
1494                 add_g(b, chan, g);
1495 }
1496
1497 static void command_commands(struct bio *b, const char *nick, const char *host, const char *target, char *args);
1498
1499 static struct command_hash unhashed[] = {
1500         { "1", command_coinflip },
1501         { "fabric", command_fabric },
1502         { "get", command_get },
1503         { "hug", command_hug },
1504         { "hugs", command_hugs, -1 },
1505         { "admire", command_admire },
1506         { "snug", command_snuggle, -1 },
1507         { "snugs", command_snuggles, -1 },
1508         { "snuggle", command_snuggle },
1509         { "snuggles", command_snuggles, -1 },
1510         { "cuddle", command_cuddle },
1511         { "cuddles", command_cuddles, -1 },
1512         { "cookie", command_cookie },
1513         { "mfw", command_mfw },
1514         { "swear", command_swear },
1515         { "mail", command_mail },
1516         { "m", command_mail, -1 },
1517         { "seen", command_seen },
1518         { "derpy", command_derpy },
1519         { "g", command_g, -1 },
1520         { "shesaid", command_shesaid },
1521         { "roll", command_roll },
1522
1523         { "rebuild", command_rebuild, 1 },
1524         { "abort", command_abort, 1 },
1525         { "crash", command_crash, 1 },
1526         { "inspect", command_inspect, 1 },
1527         { "timeout", command_timeout, 1 },
1528
1529         { "follow", command_follow },
1530         { "unfollow", command_unfollow },
1531         { "feeds", command_feeds },
1532
1533 // DEBUG
1534         { "feed_get", command_feed_get, 1 },
1535         { "feed_set", command_feed_set, 1 },
1536         { "feed_rem", command_feed_rem, 1 },
1537         { "feed_xxx", command_feed_xxx, 1 },
1538         { "feed_counter", command_feed_counter, 1 },
1539         { "seen_xxx", command_seen_xxx, 1 },
1540         { "mailbag", command_mailbag },
1541         { "mailread", command_mailread, 1 },
1542         { "\"deliver\"", command_no_deliver, 1 },
1543         { "commands", command_commands, -1 }
1544 };
1545
1546 static void command_commands(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1547 {
1548         char buffer[256];
1549         unsigned rem = sizeof(buffer)-1, first = 2, i;
1550         buffer[rem] = 0;
1551
1552         for (i = 0; i < sizeof(unhashed)/sizeof(*unhashed); ++i) {
1553                 const char *str;
1554                 unsigned long len;
1555                 if (unhashed[i].admin)
1556                         continue;
1557
1558                 str = unhashed[i].string;
1559                 len = strlen(str);
1560
1561                 if (len + 5 > rem) {
1562                         privmsg(b, target, "%s: Valid commands: %s", nick, &buffer[rem]);
1563                         first = 2;
1564                         rem = sizeof(buffer)-1;
1565                         assert(len < rem);
1566                 }
1567                 if (str) {
1568                         if (first == 2) {
1569                                 first = 1;
1570                         } else if (first) {
1571                                 rem -= 5;
1572                                 memcpy(&buffer[rem], " and ", 5);
1573                                 first = 0;
1574                         } else {
1575                                 rem -= 2;
1576                                 memcpy(&buffer[rem], ", ", 2);
1577                         }
1578                         rem -= len;
1579                         memcpy(&buffer[rem], str, len);
1580                 }
1581         }
1582         if (first < 2)
1583                 privmsg(b, target, "%s: Valid commands: %s", nick, &buffer[rem]);
1584 }
1585
1586 static void init_hash(struct bio *b, const char *target)
1587 {
1588         int i;
1589         for (i = 0; i < elements(unhashed); ++i) {
1590                 unsigned h = strhash(unhashed[i].string) % elements(commands);
1591                 if (commands[h].string)
1592                         privmsg(b, target, "%s is a duplicate command with %s", commands[h].string, unhashed[i].string);
1593                 else
1594                         commands[h] = unhashed[i];
1595         }
1596 #ifdef local_commands
1597         for (i = 0; i < elements(local_commands); ++i) {
1598                 unsigned h = strhash(local_commands[i].string) % elements(commands);
1599                 if (commands[h].string)
1600                         privmsg(b, target, "%s is a duplicate command with %s", commands[h].string, local_commands[i].string);
1601                 else
1602                         commands[h] = local_commands[i];
1603         }
1604 #endif
1605 }
1606
1607 void init_hook(struct bio *b, const char *target, const char *nick, unsigned is_ponified)
1608 {
1609         char *cwd, *path = NULL;
1610         nick_self = nick;
1611         static const char *messages[] = {
1612                 "feels circuits being activated that weren't before",
1613                 "suddenly gets a better feel of her surroundings",
1614                 "looks the same, yet there's definitely something different",
1615                 "emits a beep as her lights begin to pulse slowly",
1616                 "whirrrs and bleeps like never before",
1617                 "bleeps a few times happily",
1618                 "excitedly peeks at her surroundings"
1619         };
1620         init_hash(b, target);
1621         ponify = is_ponified;
1622
1623         cwd = getcwd(NULL, 0);
1624         asprintf(&path, "%s/db/feed.tdb", cwd);
1625         feed_db = tdb_open(path, 0, 0, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
1626         free(path);
1627         if (!feed_db)
1628                 privmsg(b, target, "Opening feed db failed: %m");
1629
1630         asprintf(&path, "%s/db/chan.tdb", cwd);
1631         chan_db = tdb_open(path, 0, 0, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
1632         free(path);
1633         if (!chan_db)
1634                 privmsg(b, target, "Opening chan db failed: %m");
1635
1636         asprintf(&path, "%s/db/mail.tdb", cwd);
1637         mail_db = tdb_open(path, 0, 0, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
1638         free(path);
1639         if (!mail_db)
1640                 privmsg(b, target, "Opening mail db failed: %m");
1641
1642         asprintf(&path, "%s/db/seen.tdb", cwd);
1643         seen_db = tdb_open(path, 0, 0, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
1644         free(path);
1645         if (!seen_db)
1646                 privmsg(b, target, "Opening seen db failed: %m");
1647
1648         free(cwd);
1649         action(b, target, "%s", messages[getrand() % elements(messages)]);
1650 }
1651
1652 static void  __attribute__((destructor)) shutdown_hook(void)
1653 {
1654         if (seen_db)
1655                 tdb_close(seen_db);
1656         if (mail_db)
1657                 tdb_close(mail_db);
1658         if (feed_db)
1659                 tdb_close(feed_db);
1660         if (chan_db)
1661                 tdb_close(chan_db);
1662 }
1663
1664 static char *nom_special(char *line)
1665 {
1666         while (*line) {
1667                 if (*line == 0x03) {
1668                         line++;
1669                         if (*line >= '0' && *line <= '9')
1670                                 line++;
1671                         else continue;
1672                         if (*line >= '0' && *line <= '9')
1673                                 line++;
1674                         if (line[0] == ',' && line[1] >= '0' && line[1] <= '9')
1675                                 line += 2;
1676                         else continue;
1677                         if (*line >= '0' && *line <= '9')
1678                                 line++;
1679                 } else if (*line != 0x02 && /* BOLD */
1680                            *line != 0x1f && /* UNDERLINE */
1681                            *line != 0x16 && /* ITALIC */
1682                            *line != 0x06 && /* NFI, is this even used? */
1683                            *line != 0x07 && /* NFI, is this even used? */
1684                            *line != 0x0f) /* NORMAL */
1685                         return line;
1686                 else
1687                         line++;
1688         }
1689         return line;
1690 }
1691
1692 static char *cleanup_special(char *line)
1693 {
1694         char *cur, *start = nom_special(line);
1695         if (!*start)
1696                 return NULL;
1697         for (line = cur = start; *line; line = nom_special(line))
1698                 *(cur++) = *(line++);
1699
1700         for (cur--; cur >= start; --cur)
1701                 if (*cur != ' ' && *cur != '\001')
1702                         break;
1703
1704         if (cur < start)
1705                 return NULL;
1706         cur[1] = 0;
1707         return start;
1708 }
1709
1710 static void rss_check(struct bio *b, const char *channel, int64_t t)
1711 {
1712         static unsigned rss_enter, rss_leave;
1713         if (t >= 0 && rss_enter == rss_leave) {
1714                 rss_enter++;
1715                 channel_feed_check(b, channel, t);
1716                 rss_leave++;
1717         }
1718 }
1719
1720 static const char *privileged_command[] = {
1721         "{ Rarity, I love you so much! }",
1722         "{ Rarity, have I ever told you that I love you? }",
1723         "{ Yes, I love my sister, Rarity. }",
1724         "{ Raaaaaaaaaaaaaarity. }",
1725         "{ You do not fool me, Rari...bot! }"
1726 };
1727
1728 static int cmd_check(struct bio *b, struct command_hash *c, int is_admin, int64_t t, const char *prefix, const char *target)
1729 {
1730         if (c->left != c->enter)
1731                 privmsg(b, target, "Command %s is disabled because of a crash", c->string);
1732         else if (t > 0 && t < c->disabled_until && !is_admin) {
1733                 int64_t delta = c->disabled_until - t;
1734                 const char *str = perty(&delta);
1735                 b->writeline(b, "NOTICE %s :Command %s is on timeout for the next %"PRIi64 " %s", prefix, c->string, delta, str);
1736         } else if (c->admin > 0 && !is_admin)
1737                 privmsg(b, target, "%s: %s", prefix, privileged_command[getrand() % elements(privileged_command)]);
1738         else
1739                 return 1;
1740         return 0;
1741 }
1742
1743 void privmsg_hook(struct bio *b, const char *prefix, const char *ident, const char *host,
1744                   const char *const *args, unsigned nargs)
1745 {
1746         char *cmd_args, *cmd;
1747         const char *target = args[0][0] == '#' ? args[0] : prefix;
1748         unsigned chan, nick_len;
1749         struct command_hash *c;
1750         int64_t t = get_time(b, target);
1751         int is_admin = admin(host);
1752
1753         chan = args[0][0] == '#';
1754         if (chan) {
1755                 rss_check(b, args[0], t);
1756                 command_deliver(b, prefix, args[0]);
1757         }
1758         cmd_args = cleanup_special((char*)args[1]);
1759         if (!cmd_args)
1760                 return;
1761
1762         if (ident && (!strcasecmp(ident, "Revolver") || !strcasecmp(ident, "Rev")))
1763                 return;
1764
1765         if (chan && cmd_args[0] == '!') {
1766                 cmd_args++;
1767         } else if (chan && (nick_len = strlen(nick_self)) &&
1768                 !strncasecmp(cmd_args, nick_self, nick_len) &&
1769                 (cmd_args[nick_len] == ':' || cmd_args[nick_len] == ',') && cmd_args[nick_len+1] == ' ') {
1770                 cmd_args += nick_len + 2;
1771                 if (!cmd_args[0])
1772                         return;
1773                 chan = 2;
1774         } else if (chan) {
1775                 if (command_channel.enter == command_channel.left) {
1776                         command_channel.enter++;
1777                         snprintf(command_channel.failed_command,
1778                                  sizeof(command_channel) - offsetof(struct command_hash, failed_command) - 1,
1779                                  "%s:%s (%s@%s) \"#\" %s", target, prefix, ident, host, cmd_args);
1780                         channel_msg(b, prefix, host, args[0], cmd_args, t);
1781                         command_channel.left++;
1782                 }
1783                 return;
1784         }
1785         cmd = token(&cmd_args, ' ');
1786         if (!chan && cmd_args && cmd_args[0] == '#') {
1787                 if (!is_admin) {
1788                         privmsg(b, target, "%s: %s", prefix, privileged_command[getrand() % elements(privileged_command)]);
1789                         return;
1790                 }
1791                 target = token(&cmd_args, ' ');
1792         }
1793
1794         c = &commands[strhash(cmd) % elements(commands)];
1795         if (c->string && !strcasecmp(c->string, cmd)) {
1796                 if (!sstrncasecmp(prefix, "EqBot")) {
1797                         action(b, target, "adoringly pulses some light back to %s", prefix);
1798                         return;
1799                 }
1800                 if (cmd_check(b, c, is_admin, t, prefix, target)) {
1801                         c->enter++;
1802                         snprintf(c->failed_command, sizeof(*c) - offsetof(struct command_hash, failed_command) - 1,
1803                                  "%s:%s (%s@%s) \"%s\" %s", target, prefix, ident, host, cmd, cmd_args);
1804                         c->cmd(b, prefix, host, target, cmd_args);
1805                         c->left++;
1806                 }
1807                 return;
1808         } else if (cmd[0] == 'd' && cmd[1] >= '0' && cmd[1] <= '9') {
1809                 char *end;
1810                 long base;
1811                 base = strtol(cmd+1, &end, 10);
1812                 if (base > 1 && base <= 20 && !*end) {
1813                         long dice = 1, bonus = 0;
1814                         char *strdice;
1815                         c = &commands[strhash("roll") % elements(commands)];
1816                         if (!cmd_check(b, c, is_admin, t, prefix, target))
1817                                 return;
1818                         c->enter++;
1819                         snprintf(c->failed_command, sizeof(*c) - offsetof(struct command_hash, failed_command) - 1,
1820                                 "%s:%s (%s@%s) \"%s\" %s", target, prefix, ident, host, cmd, cmd_args);
1821
1822                         strdice = token(&cmd_args, ' ');
1823                         if (strdice) {
1824                                 dice = strtol(strdice, &end, 10);
1825                                 if (*end || !dice || dice > 10)
1826                                         goto syntax;
1827                                 strdice = token(&cmd_args, ' ');
1828                                 if (strdice) {
1829                                         bonus = strtol(strdice, &end, 10);
1830                                         if (*end || bonus > 1000 || bonus < -1000)
1831                                                 goto syntax;
1832                                 }
1833                         }
1834                         perform_roll(b, prefix, target, base, dice, bonus);
1835                         c->left++;
1836                         return;
1837
1838 syntax:
1839                         action(b, target, "bleeps at %s in a confused manner", prefix);
1840                         c->left++;
1841                         return;
1842                 }
1843         } else if (cmd[0] >= '0' && cmd[0] <= '9') {
1844                 long dice, sides, bonus = 0;
1845                 char *end;
1846                 dice = strtol(cmd, &end, 10);
1847                 if (dice >= 1 && dice <= 10 && *end == 'd' &&
1848                     (sides = strtol(end+1, &end, 10)) &&
1849                     sides > 1 && sides <= 20 && !*end) {
1850                         char *strbonus;
1851
1852                         c = &commands[strhash("roll") % elements(commands)];
1853                         if (!cmd_check(b, c, is_admin, t, prefix, target))
1854                                 return;
1855                         c->enter++;
1856                         snprintf(c->failed_command, sizeof(*c) - offsetof(struct command_hash, failed_command) - 1,
1857                                 "%s:%s (%s@%s) \"%s\" %s", target, prefix, ident, host, cmd, cmd_args);
1858
1859                         strbonus = token(&cmd_args, ' ');
1860                         if (strbonus) {
1861                                 bonus = strtol(strbonus, &end, 10);
1862                                 if (*end || bonus > 1000 || bonus < -1000)
1863                                         goto syntax;
1864                         }
1865
1866                         perform_roll(b, prefix, target, sides, dice, bonus);
1867                         c->left++;
1868                         return;
1869                 }
1870         }
1871
1872         if (chan == 2 && t > 0) {
1873                 static int64_t last_t;
1874                 if (t - last_t > 3)
1875                         privmsg(b, target, "%s: { I love you! }", prefix);
1876                 last_t = t;
1877         }
1878 }
1879
1880 void command_hook(struct bio *b, const char *prefix, const char *ident, const char *host,
1881                   const char *command, const char *const *args, unsigned nargs)
1882 {
1883         char *buf = NULL;
1884         int64_t t = -1;
1885         if (!strcasecmp(command, "NOTICE")) {
1886                 if (nargs < 2 || args[0][0] == '#')
1887                         return;
1888                 if (admin(host))
1889                         b->writeline(b, "%s", args[1]);
1890                 else
1891                         fprintf(stderr, "%s: %s\n", prefix, args[1]);
1892         } else if (!strcasecmp(command, "JOIN")) {
1893                 t = get_time(b, args[0]);
1894                 rss_check(b, args[0], t);
1895                 command_deliver(b, prefix, args[0]);
1896                 asprintf(&buf, "%"PRIi64",joining %s", t, args[0]);
1897         } else if (!strcasecmp(command, "PART")) {
1898                 t = get_time(b, args[0]);
1899                 rss_check(b, args[0], t);
1900                 asprintf(&buf, "%"PRIi64",leaving %s", t, args[0]);
1901         } else if (!strcasecmp(command, "QUIT")) {
1902                 t = get_time(b, NULL);
1903                 asprintf(&buf, "%"PRIi64",quitting with the message \"%s\"", t, args[0]);
1904         } else if (!strcasecmp(command, "NICK")) {
1905                 t = get_time(b, NULL);
1906                 if (t >= 0) {
1907                         asprintf(&buf, "%"PRIi64",changing nick from %s", t, prefix);
1908                         if (buf)
1909                                 update_seen(b, buf, args[0]);
1910                         free(buf);
1911                         buf = NULL;
1912                 }
1913                 asprintf(&buf, "%"PRIi64",changing nick to %s", t, args[0]);
1914         } else if (0) {
1915                 int i;
1916                 fprintf(stderr, ":%s!%s%s %s", prefix, ident, host, command);
1917                 for (i = 0; i < nargs; ++i)
1918                         fprintf(stderr, " %s", args[i]);
1919                 fprintf(stderr, "\n");
1920         }
1921         if (t >= 0 && buf)
1922                 update_seen(b, buf, prefix);
1923         free(buf);
1924         return;
1925 }
1926