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