src/email.c

   1 /**
   2  * collectd - src/email.c
   3  * Copyright (C) 2006  Sebastian Harl
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  *
  19  * Author:
  20  *   Sebastian Harl <sh at tokkee.org>
  21  **/
  22
  23 /*
  24  * This plugin communicates with a spam filter, a virus scanner or similar
  25  * software using a UNIX socket and a very simple protocol:
  26  *
  27  * e-mail type (e.g. ham, spam, virus, ...) and size
  28  * e:<type>:<bytes>
  29  *
  30  * spam score
  31  * s:<value>
  32  *
  33  * successful spam checks
  34  * c:<type1>[,<type2>,...]
  35  */
  36
  37 #include "collectd.h"
  38 #include "common.h"
  39 #include "plugin.h"
  40
  41 #include "configfile.h"
  42
  43 #if HAVE_LIBPTHREAD
  44 # include <pthread.h>
  45 # define EMAIL_HAVE_READ 1
  46 #else
  47 # define EMAIL_HAVE_READ 0
  48 #endif
  49
  50 #if HAVE_SYS_SELECT_H
  51 #       include <sys/select.h>
  52 #endif /* HAVE_SYS_SELECT_H */
  53
  54 #if HAVE_SYS_SOCKET_H
  55 #       include <sys/socket.h>
  56 #endif /* HAVE_SYS_SOCKET_H */
  57
  58 /* *sigh* glibc does not define UNIX_PATH_MAX in sys/un.h ... */
  59 #if HAVE_LINUX_UN_H
  60 #       include <linux/un.h>
  61 #elif HAVE_SYS_UN_H
  62 #       include <sys/un.h>
  63 #endif /* HAVE_LINUX_UN_H | HAVE_SYS_UN_H */
  64
  65 /* some systems (e.g. Darwin) seem to not define UNIX_PATH_MAX at all */
  66 #ifndef UNIX_PATH_MAX
  67 # define UNIX_PATH_MAX sizeof (((struct sockaddr_un *)0)->sun_path)
  68 #endif /* UNIX_PATH_MAX */
  69
  70 #if HAVE_GRP_H
  71 #       include <grp.h>
  72 #endif /* HAVE_GRP_H */
  73
  74 #define MODULE_NAME "email"
  75
  76 /* 256 bytes ought to be enough for anybody ;-) */
  77 #define BUFSIZE 256
  78
  79 #ifndef COLLECTD_SOCKET_PREFIX
  80 # define COLLECTD_SOCKET_PREFIX "/tmp/.collectd-"
  81 #endif /* COLLECTD_SOCKET_PREFIX */
  82
  83 #define SOCK_PATH COLLECTD_SOCKET_PREFIX"email"
  84 #define MAX_CONNS 5
  85 #define MAX_CONNS_LIMIT 16384
  86
  87 #define log_err(...) syslog (LOG_ERR, MODULE_NAME": "__VA_ARGS__)
  88 #define log_warn(...) syslog (LOG_WARNING, MODULE_NAME": "__VA_ARGS__)
  89
  90 /*
  91  * Private data structures
  92  */
  93 #if EMAIL_HAVE_READ
  94 /* linked list of email and check types */
  95 typedef struct type {
  96         char        *name;
  97         int         value;
  98         struct type *next;
  99 } type_t;
 100
 101 typedef struct {
 102         type_t *head;
 103         type_t *tail;
 104 } type_list_t;
 105
 106 /* collector thread control information */
 107 typedef struct collector {
 108         pthread_t thread;
 109
 110         /* socket descriptor of the current/last connection */
 111         int socket;
 112 } collector_t;
 113
 114 /* linked list of pending connections */
 115 typedef struct conn {
 116         /* socket to read data from */
 117         int socket;
 118
 119         /* buffer to read data to */
 120         char *buffer;
 121         int  idx; /* current write position in buffer */
 122         int  length; /* length of the current line, i.e. index of '\0' */
 123
 124         struct conn *next;
 125 } conn_t;
 126
 127 typedef struct {
 128         conn_t *head;
 129         conn_t *tail;
 130 } conn_list_t;
 131 #endif /* EMAIL_HAVE_READ */
 132
 133 /*
 134  * Private variables
 135  */
 136 #if EMAIL_HAVE_READ
 137 /* valid configuration file keys */
 138 static char *config_keys[] =
 139 {
 140         "SocketGroup",
 141         "SocketPerms",
 142         "MaxConns",
 143         NULL
 144 };
 145 static int config_keys_num = 3;
 146
 147 /* socket configuration */
 148 static char *sock_group = COLLECTD_GRP_NAME;
 149 static int  sock_perms  = S_IRWXU | S_IRWXG;
 150 static int  max_conns   = MAX_CONNS;
 151
 152 /* state of the plugin */
 153 static int disabled = 0;
 154
 155 /* thread managing "client" connections */
 156 static pthread_t connector;
 157 static int connector_socket;
 158
 159 /* tell the collector threads that a new connection is available */
 160 static pthread_cond_t conn_available = PTHREAD_COND_INITIALIZER;
 161
 162 /* connections that are waiting to be processed */
 163 static pthread_mutex_t conns_mutex = PTHREAD_MUTEX_INITIALIZER;
 164 static conn_list_t conns;
 165
 166 /* tell the connector thread that a collector is available */
 167 static pthread_cond_t collector_available = PTHREAD_COND_INITIALIZER;
 168
 169 /* collector threads */
 170 static collector_t **collectors;
 171
 172 static pthread_mutex_t available_mutex = PTHREAD_MUTEX_INITIALIZER;
 173 static int available_collectors;
 174
 175 static pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER;
 176 static type_list_t count;
 177
 178 static pthread_mutex_t size_mutex = PTHREAD_MUTEX_INITIALIZER;
 179 static type_list_t size;
 180
 181 static pthread_mutex_t score_mutex = PTHREAD_MUTEX_INITIALIZER;
 182 static double score;
 183 static int score_count;
 184
 185 static pthread_mutex_t check_mutex = PTHREAD_MUTEX_INITIALIZER;
 186 static type_list_t check;
 187 #endif /* EMAIL_HAVE_READ */
 188
 189 #define COUNT_FILE "email/email-%s.rrd"
 190 static char *count_ds_def[] =
 191 {
 192         "DS:count:GAUGE:"COLLECTD_HEARTBEAT":0:U",
 193         NULL
 194 };
 195 static int count_ds_num = 1;
 196
 197 #define SIZE_FILE  "email/email_size-%s.rrd"
 198 static char *size_ds_def[] =
 199 {
 200         "DS:size:GAUGE:"COLLECTD_HEARTBEAT":0:U",
 201         NULL
 202 };
 203 static int size_ds_num = 1;
 204
 205 #define SCORE_FILE "email/spam_score.rrd"
 206 static char *score_ds_def[] =
 207 {
 208         "DS:score:GAUGE:"COLLECTD_HEARTBEAT":U:U",
 209         NULL
 210 };
 211 static int score_ds_num = 1;
 212
 213 #define CHECK_FILE "email/spam_check-%s.rrd"
 214 static char *check_ds_def[] =
 215 {
 216         "DS:hits:GAUGE:"COLLECTD_HEARTBEAT":0:U",
 217         NULL
 218 };
 219 static int check_ds_num = 1;
 220
 221 #if EMAIL_HAVE_READ
 222 static int email_config (char *key, char *value)
 223 {
 224         if (0 == strcasecmp (key, "SocketGroup")) {
 225                 sock_group = sstrdup (value);
 226         }
 227         else if (0 == strcasecmp (key, "SocketPerms")) {
 228                 /* the user is responsible for providing reasonable values */
 229                 sock_perms = (int)strtol (value, NULL, 8);
 230         }
 231         else if (0 == strcasecmp (key, "MaxConns")) {
 232                 long int tmp = strtol (value, NULL, 0);
 233
 234                 if (tmp < 1) {
 235                         fprintf (stderr, "email plugin: `MaxConns' was set to invalid "
 236                                         "value %li, will use default %i.\n",
 237                                         tmp, MAX_CONNS);
 238                         max_conns = MAX_CONNS;
 239                 }
 240                 else if (tmp > MAX_CONNS_LIMIT) {
 241                         fprintf (stderr, "email plugin: `MaxConns' was set to invalid "
 242                                         "value %li, will use hardcoded limit %i.\n",
 243                                         tmp, MAX_CONNS_LIMIT);
 244                         max_conns = MAX_CONNS_LIMIT;
 245                 }
 246                 else {
 247                         max_conns = (int)tmp;
 248                 }
 249         }
 250         else {
 251                 return -1;
 252         }
 253         return 0;
 254 } /* static int email_config (char *, char *) */
 255
 256 /* Increment the value of the given name in the given list by incr. */
 257 static void type_list_incr (type_list_t *list, char *name, int incr)
 258 {
 259         if (NULL == list->head) {
 260                 list->head = (type_t *)smalloc (sizeof (type_t));
 261
 262                 list->head->name  = sstrdup (name);
 263                 list->head->value = incr;
 264                 list->head->next  = NULL;
 265
 266                 list->tail = list->head;
 267         }
 268         else {
 269                 type_t *ptr;
 270
 271                 for (ptr = list->head; NULL != ptr; ptr = ptr->next) {
 272                         if (0 == strcmp (name, ptr->name))
 273                                 break;
 274                 }
 275
 276                 if (NULL == ptr) {
 277                         list->tail->next = (type_t *)smalloc (sizeof (type_t));
 278                         list->tail = list->tail->next;
 279
 280                         list->tail->name  = sstrdup (name);
 281                         list->tail->value = incr;
 282                         list->tail->next  = NULL;
 283                 }
 284                 else {
 285                         ptr->value += incr;
 286                 }
 287         }
 288         return;
 289 } /* static void type_list_incr (type_list_t *, char *) */
 290
 291 /* Read a single character from the socket. If an error occurs or end-of-file
 292  * is reached return '\0'. */
 293 static char read_char (conn_t *src)
 294 {
 295         char ret = '\0';
 296
 297         fd_set fdset;
 298
 299         FD_ZERO (&fdset);
 300         FD_SET (src->socket, &fdset);
 301
 302         if (-1 == select (src->socket + 1, &fdset, NULL, NULL, NULL)) {
 303                 log_err ("select() failed: %s", strerror (errno));
 304                 return '\0';
 305         }
 306
 307         assert (FD_ISSET (src->socket, &fdset));
 308
 309         do {
 310                 ssize_t len = 0;
 311
 312                 errno = 0;
 313                 if (0 > (len = read (src->socket, (void *)&ret, 1))) {
 314                         if (EINTR != errno) {
 315                                 log_err ("read() failed: %s", strerror (errno));
 316                                 return '\0';
 317                         }
 318                 }
 319
 320                 if (0 == len)
 321                         return '\0';
 322         } while (EINTR == errno);
 323         return ret;
 324 } /* static char read_char (conn_t *) */
 325
 326 /* Read a single line (terminated by '\n') from the the socket.
 327  *
 328  * The return value is zero terminated and does not contain any newline
 329  * characters.
 330  *
 331  * If an error occurs or end-of-file is reached return NULL.
 332  *
 333  * IMPORTANT NOTE: If there is no newline character found in BUFSIZE
 334  * characters of the input stream, the line will will be ignored! By
 335  * definition we should not get any longer input lines, thus this is
 336  * acceptable in this case ;-) */
 337 static char *read_line (conn_t *src)
 338 {
 339         int i = 0;
 340
 341         assert ((BUFSIZE >= src->idx) && (src->idx >= 0));
 342         assert ((src->idx > src->length) || (src->length == 0));
 343
 344         if (src->length > 0) { /* remove old line */
 345                 src->idx -= (src->length + 1);
 346                 memmove (src->buffer, src->buffer + src->length + 1, src->idx);
 347                 src->length = 0;
 348         }
 349
 350         for (i = 0; i < src->idx; ++i) {
 351                 if ('\n' == src->buffer[i])
 352                         break;
 353         }
 354
 355         if (i == src->idx) {
 356                 fd_set fdset;
 357
 358                 ssize_t len = 0;
 359
 360                 FD_ZERO (&fdset);
 361                 FD_SET (src->socket, &fdset);
 362
 363                 if (-1 == select (src->socket + 1, &fdset, NULL, NULL, NULL)) {
 364                         log_err ("select() failed: %s", strerror (errno));
 365                         return NULL;
 366                 }
 367
 368                 assert (FD_ISSET (src->socket, &fdset));
 369
 370                 do {
 371                         errno = 0;
 372                         if (0 > (len = read (src->socket,
 373                                                         (void *)(src->buffer + src->idx),
 374                                                         BUFSIZE - src->idx))) {
 375                                 if (EINTR != errno) {
 376                                         log_err ("read() failed: %s", strerror (errno));
 377                                         return NULL;
 378                                 }
 379                         }
 380
 381                         if (0 == len)
 382                                 return NULL;
 383                 } while (EINTR == errno);
 384
 385                 src->idx += len;
 386
 387                 for (i = src->idx - len; i < src->idx; ++i) {
 388                         if ('\n' == src->buffer[i])
 389                                 break;
 390                 }
 391
 392                 if (i == src->idx) {
 393                         src->length = 0;
 394
 395                         if (BUFSIZE == src->idx) { /* no space left in buffer */
 396                                 while ('\n' != read_char (src))
 397                                         /* ignore complete line */;
 398
 399                                 src->idx = 0;
 400                         }
 401                         return read_line (src);
 402                 }
 403         }
 404
 405         src->buffer[i] = '\0';
 406         src->length    = i;
 407
 408         return src->buffer;
 409 } /* static char *read_line (conn_t *) */
 410
 411 static void *collect (void *arg)
 412 {
 413         collector_t *this = (collector_t *)arg;
 414
 415         char *buffer = (char *)smalloc (BUFSIZE);
 416
 417         while (1) {
 418                 int loop = 1;
 419
 420                 conn_t *connection;
 421
 422                 pthread_mutex_lock (&conns_mutex);
 423
 424                 while (NULL == conns.head) {
 425                         pthread_cond_wait (&conn_available, &conns_mutex);
 426                 }
 427
 428                 connection = conns.head;
 429                 conns.head = conns.head->next;
 430
 431                 if (NULL == conns.head) {
 432                         conns.tail = NULL;
 433                 }
 434
 435                 this->socket = connection->socket;
 436
 437                 pthread_mutex_unlock (&conns_mutex);
 438
 439                 connection->buffer = buffer;
 440                 connection->idx    = 0;
 441                 connection->length = 0;
 442
 443                 { /* put the socket in non-blocking mode */
 444                         int flags = 0;
 445
 446                         errno = 0;
 447                         if (-1 == fcntl (connection->socket, F_GETFL, &flags)) {
 448                                 log_err ("fcntl() failed: %s", strerror (errno));
 449                                 loop = 0;
 450                         }
 451
 452                         errno = 0;
 453                         if (-1 == fcntl (connection->socket, F_SETFL, flags | O_NONBLOCK)) {
 454                                 log_err ("fcntl() failed: %s", strerror (errno));
 455                                 loop = 0;
 456                         }
 457                 }
 458
 459                 while (loop) {
 460                         char *line = read_line (connection);
 461
 462                         if (NULL == line) {
 463                                 loop = 0;
 464                                 break;
 465                         }
 466
 467                         if (':' != line[1]) {
 468                                 log_err ("syntax error in line '%s'", line);
 469                                 continue;
 470                         }
 471
 472                         if ('e' == line[0]) { /* e:<type>:<bytes> */
 473                                 char *ptr  = NULL;
 474                                 char *type = strtok_r (line + 2, ":", &ptr);
 475                                 char *tmp  = strtok_r (NULL, ":", &ptr);
 476                                 int  bytes = 0;
 477
 478                                 if (NULL == tmp) {
 479                                         log_err ("syntax error in line '%s'", line);
 480                                         continue;
 481                                 }
 482
 483                                 bytes = atoi (tmp);
 484
 485                                 pthread_mutex_lock (&count_mutex);
 486                                 type_list_incr (&count, type, 1);
 487                                 pthread_mutex_unlock (&count_mutex);
 488
 489                                 pthread_mutex_lock (&size_mutex);
 490                                 type_list_incr (&size, type, bytes);
 491                                 pthread_mutex_unlock (&size_mutex);
 492                         }
 493                         else if ('s' == line[0]) { /* s:<value> */
 494                                 pthread_mutex_lock (&score_mutex);
 495                                 score = (score * (double)score_count + atof (line + 2))
 496                                                 / (double)(score_count + 1);
 497                                 ++score_count;
 498                                 pthread_mutex_unlock (&score_mutex);
 499                         }
 500                         else if ('c' == line[0]) { /* c:<type1>[,<type2>,...] */
 501                                 char *ptr  = NULL;
 502                                 char *type = strtok_r (line + 2, ",", &ptr);
 503
 504                                 do {
 505                                         pthread_mutex_lock (&check_mutex);
 506                                         type_list_incr (&check, type, 1);
 507                                         pthread_mutex_unlock (&check_mutex);
 508                                 } while (NULL != (type = strtok_r (NULL, ",", &ptr)));
 509                         }
 510                         else {
 511                                 log_err ("unknown type '%c'", line[0]);
 512                         }
 513                 } /* while (loop) */
 514
 515                 close (connection->socket);
 516
 517                 free (connection);
 518
 519                 pthread_mutex_lock (&available_mutex);
 520                 ++available_collectors;
 521                 pthread_mutex_unlock (&available_mutex);
 522
 523                 pthread_cond_signal (&collector_available);
 524         } /* while (1) */
 525
 526         free (buffer);
 527         pthread_exit ((void *)0);
 528 } /* static void *collect (void *) */
 529
 530 static void *open_connection (void *arg)
 531 {
 532         struct sockaddr_un addr;
 533
 534         /* create UNIX socket */
 535         errno = 0;
 536         if (-1 == (connector_socket = socket (PF_UNIX, SOCK_STREAM, 0))) {
 537                 disabled = 1;
 538                 log_err ("socket() failed: %s", strerror (errno));
 539                 pthread_exit ((void *)1);
 540         }
 541
 542         addr.sun_family = AF_UNIX;
 543
 544         strncpy (addr.sun_path, SOCK_PATH, (size_t)(UNIX_PATH_MAX - 1));
 545         addr.sun_path[UNIX_PATH_MAX - 1] = '\0';
 546         unlink (addr.sun_path);
 547
 548         errno = 0;
 549         if (-1 == bind (connector_socket, (struct sockaddr *)&addr,
 550                                 offsetof (struct sockaddr_un, sun_path)
 551                                         + strlen(addr.sun_path))) {
 552                 disabled = 1;
 553                 log_err ("bind() failed: %s", strerror (errno));
 554                 pthread_exit ((void *)1);
 555         }
 556
 557         errno = 0;
 558         if (-1 == listen (connector_socket, 5)) {
 559                 disabled = 1;
 560                 log_err ("listen() failed: %s", strerror (errno));
 561                 pthread_exit ((void *)1);
 562         }
 563
 564         if ((uid_t)0 == geteuid ()) {
 565                 struct group *grp;
 566
 567                 errno = 0;
 568                 if (NULL != (grp = getgrnam (sock_group))) {
 569                         errno = 0;
 570                         if (0 != chown (SOCK_PATH, (uid_t)-1, grp->gr_gid)) {
 571                                 log_warn ("chown() failed: %s", strerror (errno));
 572                         }
 573                 }
 574                 else {
 575                         log_warn ("getgrnam() failed: %s", strerror (errno));
 576                 }
 577         }
 578         else {
 579                 log_warn ("not running as root");
 580         }
 581
 582         errno = 0;
 583         if (0 != chmod (SOCK_PATH, sock_perms)) {
 584                 log_warn ("chmod() failed: %s", strerror (errno));
 585         }
 586
 587         { /* initialize collector threads */
 588                 int i   = 0;
 589                 int err = 0;
 590
 591                 pthread_attr_t ptattr;
 592
 593                 conns.head = NULL;
 594                 conns.tail = NULL;
 595
 596                 pthread_attr_init (&ptattr);
 597                 pthread_attr_setdetachstate (&ptattr, PTHREAD_CREATE_DETACHED);
 598
 599                 available_collectors = max_conns;
 600
 601                 collectors =
 602                         (collector_t **)smalloc (max_conns * sizeof (collector_t *));
 603
 604                 for (i = 0; i < max_conns; ++i) {
 605                         collectors[i] = (collector_t *)smalloc (sizeof (collector_t));
 606                         collectors[i]->socket = 0;
 607
 608                         if (0 != (err = pthread_create (&collectors[i]->thread, &ptattr,
 609                                                         collect, collectors[i]))) {
 610                                 log_err ("pthread_create() failed: %s", strerror (err));
 611                         }
 612                 }
 613
 614                 pthread_attr_destroy (&ptattr);
 615         }
 616
 617         while (1) {
 618                 int remote = 0;
 619
 620                 conn_t *connection;
 621
 622                 pthread_mutex_lock (&available_mutex);
 623
 624                 while (0 == available_collectors) {
 625                         pthread_cond_wait (&collector_available, &available_mutex);
 626                 }
 627
 628                 --available_collectors;
 629
 630                 pthread_mutex_unlock (&available_mutex);
 631
 632                 do {
 633                         errno = 0;
 634                         if (-1 == (remote = accept (connector_socket, NULL, NULL))) {
 635                                 if (EINTR != errno) {
 636                                         disabled = 1;
 637                                         log_err ("accept() failed: %s", strerror (errno));
 638                                         pthread_exit ((void *)1);
 639                                 }
 640                         }
 641                 } while (EINTR == errno);
 642
 643                 connection = (conn_t *)smalloc (sizeof (conn_t));
 644
 645                 connection->socket = remote;
 646                 connection->next   = NULL;
 647
 648                 pthread_mutex_lock (&conns_mutex);
 649
 650                 if (NULL == conns.head) {
 651                         conns.head = connection;
 652                         conns.tail = connection;
 653                 }
 654                 else {
 655                         conns.tail->next = connection;
 656                         conns.tail = conns.tail->next;
 657                 }
 658
 659                 pthread_mutex_unlock (&conns_mutex);
 660
 661                 pthread_cond_signal (&conn_available);
 662         }
 663         pthread_exit ((void *)0);
 664 } /* static void *open_connection (void *) */
 665 #endif /* EMAIL_HAVE_READ */
 666
 667 static void email_init (void)
 668 {
 669 #if EMAIL_HAVE_READ
 670         int err = 0;
 671
 672         if (0 != (err = pthread_create (&connector, NULL,
 673                                 open_connection, NULL))) {
 674                 disabled = 1;
 675                 log_err ("pthread_create() failed: %s", strerror (err));
 676                 return;
 677         }
 678 #endif /* EMAIL_HAVE_READ */
 679         return;
 680 } /* static void email_init (void) */
 681
 682 #if EMAIL_HAVE_READ
 683 static void email_shutdown (void)
 684 {
 685         int i = 0;
 686
 687         if (disabled)
 688                 return;
 689
 690         pthread_kill (connector, SIGTERM);
 691         close (connector_socket);
 692
 693         /* don't allow any more connections to be processed */
 694         pthread_mutex_lock (&conns_mutex);
 695
 696         for (i = 0; i < max_conns; ++i) {
 697                 pthread_kill (collectors[i]->thread, SIGTERM);
 698                 close (collectors[i]->socket);
 699         }
 700
 701         pthread_mutex_unlock (&conns_mutex);
 702
 703         unlink (SOCK_PATH);
 704         return;
 705 } /* static void email_shutdown (void) */
 706 #endif /* EMAIL_HAVE_READ */
 707
 708 static void count_write (char *host, char *inst, char *val)
 709 {
 710         char file[BUFSIZE] = "";
 711         int  len           = 0;
 712
 713         len = snprintf (file, BUFSIZE, COUNT_FILE, inst);
 714         if ((len < 0) || (len >= BUFSIZE))
 715                 return;
 716
 717         rrd_update_file (host, file, val, count_ds_def, count_ds_num);
 718         return;
 719 } /* static void email_write (char *host, char *inst, char *val) */
 720
 721 static void size_write (char *host, char *inst, char *val)
 722 {
 723         char file[BUFSIZE] = "";
 724         int  len           = 0;
 725
 726         len = snprintf (file, BUFSIZE, SIZE_FILE, inst);
 727         if ((len < 0) || (len >= BUFSIZE))
 728                 return;
 729
 730         rrd_update_file (host, file, val, size_ds_def, size_ds_num);
 731         return;
 732 } /* static void size_write (char *host, char *inst, char *val) */
 733
 734 static void score_write (char *host, char *inst, char *val)
 735 {
 736         rrd_update_file (host, SCORE_FILE, val, score_ds_def, score_ds_num);
 737         return;
 738 } /* static void score_write (char *host, char *inst, char *val) */
 739
 740 static void check_write (char *host, char *inst, char *val)
 741 {
 742         char file[BUFSIZE] = "";
 743         int  len           = 0;
 744
 745         len = snprintf (file, BUFSIZE, CHECK_FILE, inst);
 746         if ((len < 0) || (len >= BUFSIZE))
 747                 return;
 748
 749         rrd_update_file (host, file, val, check_ds_def, check_ds_num);
 750         return;
 751 } /* static void check_write (char *host, char *inst, char *val) */
 752
 753 #if EMAIL_HAVE_READ
 754 static void type_submit (char *plugin, char *inst, int value)
 755 {
 756         char buf[BUFSIZE] = "";
 757         int  len          = 0;
 758
 759         len = snprintf (buf, BUFSIZE, "%u:%i", (unsigned int)curtime, value);
 760         if ((len < 0) || (len >= BUFSIZE))
 761                 return;
 762
 763         plugin_submit (plugin, inst, buf);
 764         return;
 765 } /* static void type_submit (char *, char *, int) */
 766
 767 static void score_submit (double value)
 768 {
 769         char buf[BUFSIZE] = "";
 770         int  len          = 0;
 771
 772         len = snprintf (buf, BUFSIZE, "%u:%.2f", (unsigned int)curtime, value);
 773         if ((len < 0) || (len >= BUFSIZE))
 774                 return;
 775
 776         plugin_submit ("email_spam_score", NULL, buf);
 777         return;
 778 } /* static void score_submit (double) */
 779
 780 static void email_read (void)
 781 {
 782         type_t *ptr;
 783
 784         if (disabled)
 785                 return;
 786
 787         pthread_mutex_lock (&count_mutex);
 788
 789         for (ptr = count.head; NULL != ptr; ptr = ptr->next) {
 790                 type_submit ("email_count", ptr->name, ptr->value);
 791                 ptr->value = 0;
 792         }
 793
 794         pthread_mutex_unlock (&count_mutex);
 795
 796         pthread_mutex_lock (&size_mutex);
 797
 798         for (ptr = size.head; NULL != ptr; ptr = ptr->next) {
 799                 type_submit ("email_size", ptr->name, ptr->value);
 800                 ptr->value = 0;
 801         }
 802
 803         pthread_mutex_unlock (&size_mutex);
 804
 805         pthread_mutex_lock (&score_mutex);
 806
 807         score_submit (score);
 808         score = 0.0;
 809         score_count = 0;
 810
 811         pthread_mutex_unlock (&score_mutex);
 812
 813         pthread_mutex_lock (&check_mutex);
 814
 815         for (ptr = check.head; NULL != ptr; ptr = ptr->next) {
 816                 type_submit ("email_spam_check", ptr->name, ptr->value);
 817                 ptr->value = 0;
 818         }
 819
 820         pthread_mutex_unlock (&check_mutex);
 821         return;
 822 } /* static void read (void) */
 823 #else /* if !EMAIL_HAVE_READ */
 824 # define email_read NULL
 825 #endif
 826
 827 void module_register (void)
 828 {
 829         plugin_register (MODULE_NAME, email_init, email_read, NULL);
 830         plugin_register ("email_count", NULL, NULL, count_write);
 831         plugin_register ("email_size", NULL, NULL, size_write);
 832         plugin_register ("email_spam_score", NULL, NULL, score_write);
 833         plugin_register ("email_spam_check", NULL, NULL, check_write);
 834 #if EMAIL_HAVE_READ
 835         plugin_register_shutdown (MODULE_NAME, email_shutdown);
 836         cf_register (MODULE_NAME, email_config, config_keys, config_keys_num);
 837 #endif /* EMAIL_HAVE_READ */
 838         return;
 839 } /* void module_register (void) */
 840
 841 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */
 842