src/email.c

   1 /**
   2  * collectd - src/email.c
   3  * Copyright (C) 2006-2008  Sebastian Harl
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *   Sebastian Harl <sh at tokkee.org>
  25  **/
  26
  27 /*
  28  * This plugin communicates with a spam filter, a virus scanner or similar
  29  * software using a UNIX socket and a very simple protocol:
  30  *
  31  * e-mail type (e.g. ham, spam, virus, ...) and size
  32  * e:<type>:<bytes>
  33  *
  34  * spam score
  35  * s:<value>
  36  *
  37  * successful spam checks
  38  * c:<type1>[,<type2>,...]
  39  */
  40
  41 #include "collectd.h"
  42 #include "common.h"
  43 #include "plugin.h"
  44
  45 #include "configfile.h"
  46
  47 #include <stddef.h>
  48
  49 #if HAVE_LIBPTHREAD
  50 # include <pthread.h>
  51 #endif
  52
  53 #include <sys/socket.h>
  54 #include <sys/un.h>
  55 #include <sys/select.h>
  56
  57 /* some systems (e.g. Darwin) seem to not define UNIX_PATH_MAX at all */
  58 #ifndef UNIX_PATH_MAX
  59 # define UNIX_PATH_MAX sizeof (((struct sockaddr_un *)0)->sun_path)
  60 #endif /* UNIX_PATH_MAX */
  61
  62 #if HAVE_GRP_H
  63 #       include <grp.h>
  64 #endif /* HAVE_GRP_H */
  65
  66 #define SOCK_PATH LOCALSTATEDIR"/run/"PACKAGE_NAME"-email"
  67 #define MAX_CONNS 5
  68 #define MAX_CONNS_LIMIT 16384
  69
  70 #define log_debug(...) DEBUG ("email: "__VA_ARGS__)
  71 #define log_err(...) ERROR ("email: "__VA_ARGS__)
  72 #define log_warn(...) WARNING ("email: "__VA_ARGS__)
  73
  74 /*
  75  * Private data structures
  76  */
  77 /* linked list of email and check types */
  78 typedef struct type {
  79         char        *name;
  80         int         value;
  81         struct type *next;
  82 } type_t;
  83
  84 typedef struct {
  85         type_t *head;
  86         type_t *tail;
  87 } type_list_t;
  88
  89 /* collector thread control information */
  90 typedef struct collector {
  91         pthread_t thread;
  92
  93         /* socket descriptor of the current/last connection */
  94         FILE *socket;
  95 } collector_t;
  96
  97 /* linked list of pending connections */
  98 typedef struct conn {
  99         /* socket to read data from */
 100         FILE *socket;
 101
 102         /* linked list of connections */
 103         struct conn *next;
 104 } conn_t;
 105
 106 typedef struct {
 107         conn_t *head;
 108         conn_t *tail;
 109 } conn_list_t;
 110
 111 /*
 112  * Private variables
 113  */
 114 /* valid configuration file keys */
 115 static const char *config_keys[] =
 116 {
 117         "SocketFile",
 118         "SocketGroup",
 119         "SocketPerms",
 120         "MaxConns"
 121 };
 122 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
 123
 124 /* socket configuration */
 125 static char *sock_file  = NULL;
 126 static char *sock_group = NULL;
 127 static int  sock_perms  = S_IRWXU | S_IRWXG;
 128 static int  max_conns   = MAX_CONNS;
 129
 130 /* state of the plugin */
 131 static int disabled = 0;
 132
 133 /* thread managing "client" connections */
 134 static pthread_t connector = (pthread_t) 0;
 135 static int connector_socket = -1;
 136
 137 /* tell the collector threads that a new connection is available */
 138 static pthread_cond_t conn_available = PTHREAD_COND_INITIALIZER;
 139
 140 /* connections that are waiting to be processed */
 141 static pthread_mutex_t conns_mutex = PTHREAD_MUTEX_INITIALIZER;
 142 static conn_list_t conns;
 143
 144 /* tell the connector thread that a collector is available */
 145 static pthread_cond_t collector_available = PTHREAD_COND_INITIALIZER;
 146
 147 /* collector threads */
 148 static collector_t **collectors = NULL;
 149
 150 static pthread_mutex_t available_mutex = PTHREAD_MUTEX_INITIALIZER;
 151 static int available_collectors;
 152
 153 static pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER;
 154 static type_list_t list_count;
 155 static type_list_t list_count_copy;
 156
 157 static pthread_mutex_t size_mutex = PTHREAD_MUTEX_INITIALIZER;
 158 static type_list_t list_size;
 159 static type_list_t list_size_copy;
 160
 161 static pthread_mutex_t score_mutex = PTHREAD_MUTEX_INITIALIZER;
 162 static double score;
 163 static int score_count;
 164
 165 static pthread_mutex_t check_mutex = PTHREAD_MUTEX_INITIALIZER;
 166 static type_list_t list_check;
 167 static type_list_t list_check_copy;
 168
 169 /*
 170  * Private functions
 171  */
 172 static int email_config (const char *key, const char *value)
 173 {
 174         if (0 == strcasecmp (key, "SocketFile")) {
 175                 if (NULL != sock_file)
 176                         free (sock_file);
 177                 sock_file = sstrdup (value);
 178         }
 179         else if (0 == strcasecmp (key, "SocketGroup")) {
 180                 if (NULL != sock_group)
 181                         free (sock_group);
 182                 sock_group = sstrdup (value);
 183         }
 184         else if (0 == strcasecmp (key, "SocketPerms")) {
 185                 /* the user is responsible for providing reasonable values */
 186                 sock_perms = (int)strtol (value, NULL, 8);
 187         }
 188         else if (0 == strcasecmp (key, "MaxConns")) {
 189                 long int tmp = strtol (value, NULL, 0);
 190
 191                 if (tmp < 1) {
 192                         fprintf (stderr, "email plugin: `MaxConns' was set to invalid "
 193                                         "value %li, will use default %i.\n",
 194                                         tmp, MAX_CONNS);
 195                         ERROR ("email plugin: `MaxConns' was set to invalid "
 196                                         "value %li, will use default %i.\n",
 197                                         tmp, MAX_CONNS);
 198                         max_conns = MAX_CONNS;
 199                 }
 200                 else if (tmp > MAX_CONNS_LIMIT) {
 201                         fprintf (stderr, "email plugin: `MaxConns' was set to invalid "
 202                                         "value %li, will use hardcoded limit %i.\n",
 203                                         tmp, MAX_CONNS_LIMIT);
 204                         ERROR ("email plugin: `MaxConns' was set to invalid "
 205                                         "value %li, will use hardcoded limit %i.\n",
 206                                         tmp, MAX_CONNS_LIMIT);
 207                         max_conns = MAX_CONNS_LIMIT;
 208                 }
 209                 else {
 210                         max_conns = (int)tmp;
 211                 }
 212         }
 213         else {
 214                 return -1;
 215         }
 216         return 0;
 217 } /* static int email_config (char *, char *) */
 218
 219 /* Increment the value of the given name in the given list by incr. */
 220 static void type_list_incr (type_list_t *list, char *name, int incr)
 221 {
 222         if (NULL == list->head) {
 223                 list->head = (type_t *)smalloc (sizeof (type_t));
 224
 225                 list->head->name  = sstrdup (name);
 226                 list->head->value = incr;
 227                 list->head->next  = NULL;
 228
 229                 list->tail = list->head;
 230         }
 231         else {
 232                 type_t *ptr;
 233
 234                 for (ptr = list->head; NULL != ptr; ptr = ptr->next) {
 235                         if (0 == strcmp (name, ptr->name))
 236                                 break;
 237                 }
 238
 239                 if (NULL == ptr) {
 240                         list->tail->next = (type_t *)smalloc (sizeof (type_t));
 241                         list->tail = list->tail->next;
 242
 243                         list->tail->name  = sstrdup (name);
 244                         list->tail->value = incr;
 245                         list->tail->next  = NULL;
 246                 }
 247                 else {
 248                         ptr->value += incr;
 249                 }
 250         }
 251         return;
 252 } /* static void type_list_incr (type_list_t *, char *) */
 253
 254 static void *collect (void *arg)
 255 {
 256         collector_t *this = (collector_t *)arg;
 257
 258         while (1) {
 259                 conn_t *connection;
 260
 261                 pthread_mutex_lock (&conns_mutex);
 262
 263                 while (NULL == conns.head) {
 264                         pthread_cond_wait (&conn_available, &conns_mutex);
 265                 }
 266
 267                 connection = conns.head;
 268                 conns.head = conns.head->next;
 269
 270                 if (NULL == conns.head) {
 271                         conns.tail = NULL;
 272                 }
 273
 274                 pthread_mutex_unlock (&conns_mutex);
 275
 276                 /* make the socket available to the global
 277                  * thread and connection management */
 278                 this->socket = connection->socket;
 279
 280                 log_debug ("collect: handling connection on fd #%i",
 281                                 fileno (this->socket));
 282
 283                 while (42) {
 284                         /* 256 bytes ought to be enough for anybody ;-) */
 285                         char line[256 + 1]; /* line + '\0' */
 286                         int  len = 0;
 287
 288                         errno = 0;
 289                         if (NULL == fgets (line, sizeof (line), this->socket)) {
 290                                 if (0 != errno) {
 291                                         char errbuf[1024];
 292                                         log_err ("collect: reading from socket (fd #%i) "
 293                                                         "failed: %s", fileno (this->socket),
 294                                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 295                                 }
 296                                 break;
 297                         }
 298
 299                         len = strlen (line);
 300                         if (('\n' != line[len - 1]) && ('\r' != line[len - 1])) {
 301                                 log_warn ("collect: line too long (> %zu characters): "
 302                                                 "'%s' (truncated)", sizeof (line) - 1, line);
 303
 304                                 while (NULL != fgets (line, sizeof (line), this->socket))
 305                                         if (('\n' == line[len - 1]) || ('\r' == line[len - 1]))
 306                                                 break;
 307                                 continue;
 308                         }
 309                         if (len < 3) { /* [a-z] ':' '\n' */
 310                                 continue;
 311                         }
 312
 313                         line[len - 1] = 0;
 314
 315                         log_debug ("collect: line = '%s'", line);
 316
 317                         if (':' != line[1]) {
 318                                 log_err ("collect: syntax error in line '%s'", line);
 319                                 continue;
 320                         }
 321
 322                         if ('e' == line[0]) { /* e:<type>:<bytes> */
 323                                 char *ptr  = NULL;
 324                                 char *type = strtok_r (line + 2, ":", &ptr);
 325                                 char *tmp  = strtok_r (NULL, ":", &ptr);
 326                                 int  bytes = 0;
 327
 328                                 if (NULL == tmp) {
 329                                         log_err ("collect: syntax error in line '%s'", line);
 330                                         continue;
 331                                 }
 332
 333                                 bytes = atoi (tmp);
 334
 335                                 pthread_mutex_lock (&count_mutex);
 336                                 type_list_incr (&list_count, type, /* increment = */ 1);
 337                                 pthread_mutex_unlock (&count_mutex);
 338
 339                                 if (bytes > 0) {
 340                                         pthread_mutex_lock (&size_mutex);
 341                                         type_list_incr (&list_size, type, /* increment = */ bytes);
 342                                         pthread_mutex_unlock (&size_mutex);
 343                                 }
 344                         }
 345                         else if ('s' == line[0]) { /* s:<value> */
 346                                 pthread_mutex_lock (&score_mutex);
 347                                 score = (score * (double)score_count + atof (line + 2))
 348                                                 / (double)(score_count + 1);
 349                                 ++score_count;
 350                                 pthread_mutex_unlock (&score_mutex);
 351                         }
 352                         else if ('c' == line[0]) { /* c:<type1>[,<type2>,...] */
 353                                 char *dummy = line + 2;
 354                                 char *endptr = NULL;
 355                                 char *type;
 356
 357                                 pthread_mutex_lock (&check_mutex);
 358                                 while ((type = strtok_r (dummy, ",", &endptr)) != NULL)
 359                                 {
 360                                         dummy = NULL;
 361                                         type_list_incr (&list_check, type, /* increment = */ 1);
 362                                 }
 363                                 pthread_mutex_unlock (&check_mutex);
 364                         }
 365                         else {
 366                                 log_err ("collect: unknown type '%c'", line[0]);
 367                         }
 368                 } /* while (42) */
 369
 370                 log_debug ("Shutting down connection on fd #%i",
 371                                 fileno (this->socket));
 372
 373                 fclose (connection->socket);
 374                 free (connection);
 375
 376                 this->socket = NULL;
 377
 378                 pthread_mutex_lock (&available_mutex);
 379                 ++available_collectors;
 380                 pthread_mutex_unlock (&available_mutex);
 381
 382                 pthread_cond_signal (&collector_available);
 383         } /* while (1) */
 384
 385         pthread_exit ((void *)0);
 386         return ((void *) 0);
 387 } /* static void *collect (void *) */
 388
 389 static void *open_connection (void __attribute__((unused)) *arg)
 390 {
 391         struct sockaddr_un addr;
 392
 393         char *path  = (NULL == sock_file) ? SOCK_PATH : sock_file;
 394         char *group = (NULL == sock_group) ? COLLECTD_GRP_NAME : sock_group;
 395
 396         /* create UNIX socket */
 397         errno = 0;
 398         if (-1 == (connector_socket = socket (PF_UNIX, SOCK_STREAM, 0))) {
 399                 char errbuf[1024];
 400                 disabled = 1;
 401                 log_err ("socket() failed: %s",
 402                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 403                 pthread_exit ((void *)1);
 404         }
 405
 406         addr.sun_family = AF_UNIX;
 407         sstrncpy (addr.sun_path, path, (size_t)(UNIX_PATH_MAX - 1));
 408
 409         errno = 0;
 410         if (-1 == bind (connector_socket, (struct sockaddr *)&addr,
 411                                 offsetof (struct sockaddr_un, sun_path)
 412                                         + strlen(addr.sun_path))) {
 413                 char errbuf[1024];
 414                 disabled = 1;
 415                 close (connector_socket);
 416                 connector_socket = -1;
 417                 log_err ("bind() failed: %s",
 418                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 419                 pthread_exit ((void *)1);
 420         }
 421
 422         errno = 0;
 423         if (-1 == listen (connector_socket, 5)) {
 424                 char errbuf[1024];
 425                 disabled = 1;
 426                 close (connector_socket);
 427                 connector_socket = -1;
 428                 log_err ("listen() failed: %s",
 429                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 430                 pthread_exit ((void *)1);
 431         }
 432
 433         {
 434                 struct group sg;
 435                 struct group *grp;
 436                 char grbuf[2048];
 437                 int status;
 438
 439                 grp = NULL;
 440                 status = getgrnam_r (group, &sg, grbuf, sizeof (grbuf), &grp);
 441                 if (status != 0)
 442                 {
 443                         char errbuf[1024];
 444                         log_warn ("getgrnam_r (%s) failed: %s", group,
 445                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 446                 }
 447                 else if (grp == NULL)
 448                 {
 449                         log_warn ("No such group: `%s'", group);
 450                 }
 451                 else
 452                 {
 453                         status = chown (path, (uid_t) -1, grp->gr_gid);
 454                         if (status != 0)
 455                         {
 456                                 char errbuf[1024];
 457                                 log_warn ("chown (%s, -1, %i) failed: %s",
 458                                                 path, (int) grp->gr_gid,
 459                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 460                         }
 461                 }
 462         }
 463
 464         errno = 0;
 465         if (0 != chmod (path, sock_perms)) {
 466                 char errbuf[1024];
 467                 log_warn ("chmod() failed: %s",
 468                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 469         }
 470
 471         { /* initialize collector threads */
 472                 int i   = 0;
 473                 int err = 0;
 474
 475                 pthread_attr_t ptattr;
 476
 477                 conns.head = NULL;
 478                 conns.tail = NULL;
 479
 480                 pthread_attr_init (&ptattr);
 481                 pthread_attr_setdetachstate (&ptattr, PTHREAD_CREATE_DETACHED);
 482
 483                 available_collectors = max_conns;
 484
 485                 collectors =
 486                         (collector_t **)smalloc (max_conns * sizeof (collector_t *));
 487
 488                 for (i = 0; i < max_conns; ++i) {
 489                         collectors[i] = (collector_t *)smalloc (sizeof (collector_t));
 490                         collectors[i]->socket = NULL;
 491
 492                         if (0 != (err = plugin_thread_create (&collectors[i]->thread,
 493                                                         &ptattr, collect, collectors[i]))) {
 494                                 char errbuf[1024];
 495                                 log_err ("pthread_create() failed: %s",
 496                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 497                                 collectors[i]->thread = (pthread_t) 0;
 498                         }
 499                 }
 500
 501                 pthread_attr_destroy (&ptattr);
 502         }
 503
 504         while (1) {
 505                 int remote = 0;
 506
 507                 conn_t *connection;
 508
 509                 pthread_mutex_lock (&available_mutex);
 510
 511                 while (0 == available_collectors) {
 512                         pthread_cond_wait (&collector_available, &available_mutex);
 513                 }
 514
 515                 --available_collectors;
 516
 517                 pthread_mutex_unlock (&available_mutex);
 518
 519                 while (42) {
 520                         errno = 0;
 521
 522                         remote = accept (connector_socket, NULL, NULL);
 523                         if (remote == -1) {
 524                                 char errbuf[1024];
 525
 526                                 if (errno == EINTR)
 527                                         continue;
 528
 529                                 disabled = 1;
 530                                 close (connector_socket);
 531                                 connector_socket = -1;
 532                                 log_err ("accept() failed: %s",
 533                                                  sstrerror (errno, errbuf, sizeof (errbuf)));
 534                                 pthread_exit ((void *)1);
 535                         }
 536
 537                         /* access() succeeded. */
 538                         break;
 539                 }
 540
 541                 connection = malloc (sizeof (*connection));
 542                 if (connection != NULL)
 543                 {
 544                         close (remote);
 545                         continue;
 546                 }
 547                 memset (connection, 0, sizeof (*connection));
 548
 549                 connection->socket = fdopen (remote, "r");
 550                 connection->next   = NULL;
 551
 552                 if (NULL == connection->socket) {
 553                         close (remote);
 554                         sfree (connection);
 555                         continue;
 556                 }
 557
 558                 pthread_mutex_lock (&conns_mutex);
 559
 560                 if (NULL == conns.head) {
 561                         conns.head = connection;
 562                         conns.tail = connection;
 563                 }
 564                 else {
 565                         conns.tail->next = connection;
 566                         conns.tail = conns.tail->next;
 567                 }
 568
 569                 pthread_mutex_unlock (&conns_mutex);
 570
 571                 pthread_cond_signal (&conn_available);
 572         }
 573
 574         pthread_exit ((void *) 0);
 575         return ((void *) 0);
 576 } /* static void *open_connection (void *) */
 577
 578 static int email_init (void)
 579 {
 580         int err = 0;
 581
 582         if (0 != (err = plugin_thread_create (&connector, NULL,
 583                                 open_connection, NULL))) {
 584                 char errbuf[1024];
 585                 disabled = 1;
 586                 log_err ("pthread_create() failed: %s",
 587                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 588                 return (-1);
 589         }
 590
 591         return (0);
 592 } /* int email_init */
 593
 594 static void type_list_free (type_list_t *t)
 595 {
 596         type_t *this;
 597
 598         this = t->head;
 599         while (this != NULL)
 600         {
 601                 type_t *next = this->next;
 602
 603                 sfree (this->name);
 604                 sfree (this);
 605
 606                 this = next;
 607         }
 608
 609         t->head = NULL;
 610         t->tail = NULL;
 611 }
 612
 613 static int email_shutdown (void)
 614 {
 615         int i = 0;
 616
 617         if (connector != ((pthread_t) 0)) {
 618                 pthread_kill (connector, SIGTERM);
 619                 connector = (pthread_t) 0;
 620         }
 621
 622         if (connector_socket >= 0) {
 623                 close (connector_socket);
 624                 connector_socket = -1;
 625         }
 626
 627         /* don't allow any more connections to be processed */
 628         pthread_mutex_lock (&conns_mutex);
 629
 630         available_collectors = 0;
 631
 632         if (collectors != NULL) {
 633                 for (i = 0; i < max_conns; ++i) {
 634                         if (collectors[i] == NULL)
 635                                 continue;
 636
 637                         if (collectors[i]->thread != ((pthread_t) 0)) {
 638                                 pthread_kill (collectors[i]->thread, SIGTERM);
 639                                 collectors[i]->thread = (pthread_t) 0;
 640                         }
 641
 642                         if (collectors[i]->socket != NULL) {
 643                                 fclose (collectors[i]->socket);
 644                                 collectors[i]->socket = NULL;
 645                         }
 646
 647                         sfree (collectors[i]);
 648                 }
 649                 sfree (collectors);
 650         } /* if (collectors != NULL) */
 651
 652         pthread_mutex_unlock (&conns_mutex);
 653
 654         type_list_free (&list_count);
 655         type_list_free (&list_count_copy);
 656         type_list_free (&list_size);
 657         type_list_free (&list_size_copy);
 658         type_list_free (&list_check);
 659         type_list_free (&list_check_copy);
 660
 661         unlink ((NULL == sock_file) ? SOCK_PATH : sock_file);
 662
 663         sfree (sock_file);
 664         sfree (sock_group);
 665         return (0);
 666 } /* static void email_shutdown (void) */
 667
 668 static void email_submit (const char *type, const char *type_instance, gauge_t value)
 669 {
 670         value_t values[1];
 671         value_list_t vl = VALUE_LIST_INIT;
 672
 673         values[0].gauge = value;
 674
 675         vl.values = values;
 676         vl.values_len = 1;
 677         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 678         sstrncpy (vl.plugin, "email", sizeof (vl.plugin));
 679         sstrncpy (vl.type, type, sizeof (vl.type));
 680         sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
 681
 682         plugin_dispatch_values (&vl);
 683 } /* void email_submit */
 684
 685 /* Copy list l1 to list l2. l2 may partly exist already, but it is assumed
 686  * that neither the order nor the name of any element of either list is
 687  * changed and no elements are deleted. The values of l1 are reset to zero
 688  * after they have been copied to l2. */
 689 static void copy_type_list (type_list_t *l1, type_list_t *l2)
 690 {
 691         type_t *ptr1;
 692         type_t *ptr2;
 693
 694         type_t *last = NULL;
 695
 696         for (ptr1 = l1->head, ptr2 = l2->head; NULL != ptr1;
 697                         ptr1 = ptr1->next, last = ptr2, ptr2 = ptr2->next) {
 698                 if (NULL == ptr2) {
 699                         ptr2 = (type_t *)smalloc (sizeof (type_t));
 700                         ptr2->name = NULL;
 701                         ptr2->next = NULL;
 702
 703                         if (NULL == last) {
 704                                 l2->head = ptr2;
 705                         }
 706                         else {
 707                                 last->next = ptr2;
 708                         }
 709
 710                         l2->tail = ptr2;
 711                 }
 712
 713                 if (NULL == ptr2->name) {
 714                         ptr2->name = sstrdup (ptr1->name);
 715                 }
 716
 717                 ptr2->value = ptr1->value;
 718                 ptr1->value = 0;
 719         }
 720         return;
 721 }
 722
 723 static int email_read (void)
 724 {
 725         type_t *ptr;
 726
 727         double score_old;
 728         int score_count_old;
 729
 730         if (disabled)
 731                 return (-1);
 732
 733         /* email count */
 734         pthread_mutex_lock (&count_mutex);
 735
 736         copy_type_list (&list_count, &list_count_copy);
 737
 738         pthread_mutex_unlock (&count_mutex);
 739
 740         for (ptr = list_count_copy.head; NULL != ptr; ptr = ptr->next) {
 741                 email_submit ("email_count", ptr->name, ptr->value);
 742         }
 743
 744         /* email size */
 745         pthread_mutex_lock (&size_mutex);
 746
 747         copy_type_list (&list_size, &list_size_copy);
 748
 749         pthread_mutex_unlock (&size_mutex);
 750
 751         for (ptr = list_size_copy.head; NULL != ptr; ptr = ptr->next) {
 752                 email_submit ("email_size", ptr->name, ptr->value);
 753         }
 754
 755         /* spam score */
 756         pthread_mutex_lock (&score_mutex);
 757
 758         score_old = score;
 759         score_count_old = score_count;
 760         score = 0.0;
 761         score_count = 0;
 762
 763         pthread_mutex_unlock (&score_mutex);
 764
 765         if (score_count_old > 0)
 766                 email_submit ("spam_score", "", score_old);
 767
 768         /* spam checks */
 769         pthread_mutex_lock (&check_mutex);
 770
 771         copy_type_list (&list_check, &list_check_copy);
 772
 773         pthread_mutex_unlock (&check_mutex);
 774
 775         for (ptr = list_check_copy.head; NULL != ptr; ptr = ptr->next)
 776                 email_submit ("spam_check", ptr->name, ptr->value);
 777
 778         return (0);
 779 } /* int email_read */
 780
 781 void module_register (void)
 782 {
 783         plugin_register_config ("email", email_config, config_keys, config_keys_num);
 784         plugin_register_init ("email", email_init);
 785         plugin_register_read ("email", email_read);
 786         plugin_register_shutdown ("email", email_shutdown);
 787 } /* void module_register */
 788
 789 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */