401ac928108ec6db4e7b8b1067de20c2dbea27ef
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 **/
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 */
37 #include "collectd.h"
38 #include "common.h"
39 #include "plugin.h"
41 #include "configfile.h"
43 #if HAVE_LIBPTHREAD
44 # include <pthread.h>
45 # define EMAIL_HAVE_READ 1
46 #else
47 # define EMAIL_HAVE_READ 0
48 #endif
50 #if HAVE_SYS_SELECT_H
51 # include <sys/select.h>
52 #endif /* HAVE_SYS_SELECT_H */
54 #if HAVE_SYS_SOCKET_H
55 # include <sys/socket.h>
56 #endif /* HAVE_SYS_SOCKET_H */
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 */
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 */
70 #if HAVE_GRP_H
71 # include <grp.h>
72 #endif /* HAVE_GRP_H */
74 #define MODULE_NAME "email"
76 /* 256 bytes ought to be enough for anybody ;-) */
77 #define BUFSIZE 256
79 #ifndef COLLECTD_SOCKET_PREFIX
80 # define COLLECTD_SOCKET_PREFIX "/tmp/.collectd-"
81 #endif /* COLLECTD_SOCKET_PREFIX */
83 #define SOCK_PATH COLLECTD_SOCKET_PREFIX"email"
84 #define MAX_CONNS 5
85 #define MAX_CONNS_LIMIT 16384
87 /*
88 * Private data structures
89 */
90 #if EMAIL_HAVE_READ
91 /* linked list of email and check types */
92 typedef struct type {
93 char *name;
94 int value;
95 struct type *next;
96 } type_t;
98 typedef struct {
99 type_t *head;
100 type_t *tail;
101 } type_list_t;
103 /* collector thread control information */
104 typedef struct collector {
105 pthread_t thread;
107 /* socket descriptor of the current/last connection */
108 int socket;
109 } collector_t;
111 /* linked list of pending connections */
112 typedef struct conn {
113 /* socket to read data from */
114 int socket;
116 /* buffer to read data to */
117 char *buffer;
118 int idx; /* current position in buffer */
120 struct conn *next;
121 } conn_t;
123 typedef struct {
124 conn_t *head;
125 conn_t *tail;
126 } conn_list_t;
127 #endif /* EMAIL_HAVE_READ */
129 /*
130 * Private variables
131 */
132 #if EMAIL_HAVE_READ
133 /* valid configuration file keys */
134 static char *config_keys[] =
135 {
136 "SocketGroup",
137 "SocketPerms",
138 "MaxConns",
139 NULL
140 };
141 static int config_keys_num = 3;
143 /* socket configuration */
144 static char *sock_group = COLLECTD_GRP_NAME;
145 static int sock_perms = S_IRWXU | S_IRWXG;
146 static int max_conns = MAX_CONNS;
148 /* state of the plugin */
149 static int disabled = 0;
151 /* thread managing "client" connections */
152 static pthread_t connector;
153 static int connector_socket;
155 /* tell the collector threads that a new connection is available */
156 static pthread_cond_t conn_available = PTHREAD_COND_INITIALIZER;
158 /* connections that are waiting to be processed */
159 static pthread_mutex_t conns_mutex = PTHREAD_MUTEX_INITIALIZER;
160 static conn_list_t conns;
162 /* tell the connector thread that a collector is available */
163 static pthread_cond_t collector_available = PTHREAD_COND_INITIALIZER;
165 /* collector threads */
166 static collector_t **collectors;
168 static pthread_mutex_t available_mutex = PTHREAD_MUTEX_INITIALIZER;
169 static int available_collectors;
171 static pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER;
172 static type_list_t count;
174 static pthread_mutex_t size_mutex = PTHREAD_MUTEX_INITIALIZER;
175 static type_list_t size;
177 static pthread_mutex_t score_mutex = PTHREAD_MUTEX_INITIALIZER;
178 static double score;
179 static int score_count;
181 static pthread_mutex_t check_mutex = PTHREAD_MUTEX_INITIALIZER;
182 static type_list_t check;
183 #endif /* EMAIL_HAVE_READ */
185 #define COUNT_FILE "email/email-%s.rrd"
186 static char *count_ds_def[] =
187 {
188 "DS:count:GAUGE:"COLLECTD_HEARTBEAT":0:U",
189 NULL
190 };
191 static int count_ds_num = 1;
193 #define SIZE_FILE "email/email_size-%s.rrd"
194 static char *size_ds_def[] =
195 {
196 "DS:size:GAUGE:"COLLECTD_HEARTBEAT":0:U",
197 NULL
198 };
199 static int size_ds_num = 1;
201 #define SCORE_FILE "email/spam_score.rrd"
202 static char *score_ds_def[] =
203 {
204 "DS:score:GAUGE:"COLLECTD_HEARTBEAT":U:U",
205 NULL
206 };
207 static int score_ds_num = 1;
209 #define CHECK_FILE "email/spam_check-%s.rrd"
210 static char *check_ds_def[] =
211 {
212 "DS:hits:GAUGE:"COLLECTD_HEARTBEAT":0:U",
213 NULL
214 };
215 static int check_ds_num = 1;
217 #if EMAIL_HAVE_READ
218 static int email_config (char *key, char *value)
219 {
220 if (0 == strcasecmp (key, "SocketGroup")) {
221 sock_group = sstrdup (value);
222 }
223 else if (0 == strcasecmp (key, "SocketPerms")) {
224 /* the user is responsible for providing reasonable values */
225 sock_perms = (int)strtol (value, NULL, 8);
226 }
227 else if (0 == strcasecmp (key, "MaxConns")) {
228 long int tmp = strtol (value, NULL, 0);
230 if (tmp < 1) {
231 fprintf (stderr, "email plugin: `MaxConns' was set to invalid "
232 "value %li, will use default %i.\n",
233 tmp, MAX_CONNS);
234 max_conns = MAX_CONNS;
235 }
236 else if (tmp > MAX_CONNS_LIMIT) {
237 fprintf (stderr, "email plugin: `MaxConns' was set to invalid "
238 "value %li, will use hardcoded limit %i.\n",
239 tmp, MAX_CONNS_LIMIT);
240 max_conns = MAX_CONNS_LIMIT;
241 }
242 else {
243 max_conns = (int)tmp;
244 }
245 }
246 else {
247 return -1;
248 }
249 return 0;
250 } /* static int email_config (char *, char *) */
252 /* Increment the value of the given name in the given list by incr. */
253 static void type_list_incr (type_list_t *list, char *name, int incr)
254 {
255 if (NULL == list->head) {
256 list->head = (type_t *)smalloc (sizeof (type_t));
258 list->head->name = sstrdup (name);
259 list->head->value = incr;
260 list->head->next = NULL;
262 list->tail = list->head;
263 }
264 else {
265 type_t *ptr;
267 for (ptr = list->head; NULL != ptr; ptr = ptr->next) {
268 if (0 == strcmp (name, ptr->name))
269 break;
270 }
272 if (NULL == ptr) {
273 list->tail->next = (type_t *)smalloc (sizeof (type_t));
274 list->tail = list->tail->next;
276 list->tail->name = sstrdup (name);
277 list->tail->value = incr;
278 list->tail->next = NULL;
279 }
280 else {
281 ptr->value += incr;
282 }
283 }
284 return;
285 } /* static void type_list_incr (type_list_t *, char *) */
287 /* Read a single character from the socket. If an error occurs or end-of-file
288 * is reached return '\0'. */
289 char read_char (conn_t *src)
290 {
291 char ret = '\0';
293 fd_set fdset;
295 FD_ZERO (&fdset);
296 FD_SET (src->socket, &fdset);
298 if (-1 == select (src->socket + 1, &fdset, NULL, NULL, NULL)) {
299 syslog (LOG_ERR, "select() failed: %s", strerror (errno));
300 return '\0';
301 }
303 assert (FD_ISSET (src->socket, &fdset));
305 do {
306 ssize_t len = 0;
308 errno = 0;
309 if (0 > (len = read (src->socket, (void *)&ret, 1))) {
310 if (EINTR != errno) {
311 syslog (LOG_ERR, "read() failed: %s", strerror (errno));
312 return '\0';
313 }
314 }
316 if (0 == len)
317 return '\0';
318 } while (EINTR == errno);
319 return ret;
320 } /* char read_char (conn_t *) */
322 /* Read a single line (terminated by '\n') from the the socket.
323 *
324 * The return value is zero terminated and does not contain any newline
325 * characters. In case that no complete line is available (non-blocking mode
326 * should be enabled) an empty string is returned.
327 *
328 * If an error occurs or end-of-file is reached return NULL.
329 *
330 * IMPORTANT NOTE: If there is no newline character found in BUFSIZE
331 * characters of the input stream, the line will will be ignored! By
332 * definition we should not get any longer input lines, thus this is
333 * acceptable in this case ;-) */
334 char *read_line (conn_t *src)
335 {
336 int i = 0;
337 char *ret;
339 assert (BUFSIZE > src->idx);
341 for (i = 0; i < src->idx; ++i) {
342 if ('\n' == src->buffer[i])
343 break;
344 }
346 if (i == src->idx) {
347 fd_set fdset;
349 ssize_t len = 0;
351 FD_ZERO (&fdset);
352 FD_SET (src->socket, &fdset);
354 if (-1 == select (src->socket + 1, &fdset, NULL, NULL, NULL)) {
355 syslog (LOG_ERR, "select() failed: %s", strerror (errno));
356 return NULL;
357 }
359 assert (FD_ISSET (src->socket, &fdset));
361 do {
362 errno = 0;
363 if (0 > (len = read (src->socket,
364 (void *)(src->buffer + src->idx),
365 BUFSIZE - src->idx))) {
366 if (EINTR != errno) {
367 syslog (LOG_ERR, "read() failed: %s", strerror (errno));
368 return NULL;
369 }
370 }
372 if (0 == len)
373 return NULL;
374 } while (EINTR == errno);
376 src->idx += len;
378 for (i = src->idx - len; i < src->idx; ++i) {
379 if ('\n' == src->buffer[i])
380 break;
381 }
383 if (i == src->idx) {
384 ret = (char *)smalloc (1);
386 ret[0] = '\0';
388 if (BUFSIZE == src->idx) { /* no space left in buffer */
389 while ('\n' != read_char (src))
390 /* ignore complete line */;
392 src->idx = 0;
393 }
394 return ret;
395 }
396 }
398 ret = (char *)smalloc (i + 1);
399 memcpy (ret, src->buffer, i + 1);
400 ret[i] = '\0';
402 src->idx -= (i + 1);
404 if (0 == src->idx)
405 src->buffer[0] = '\0';
406 else
407 memmove (src->buffer, src->buffer + i + 1, src->idx);
408 return ret;
409 } /* char *read_line (conn_t *) */
411 static void *collect (void *arg)
412 {
413 collector_t *this = (collector_t *)arg;
415 char *buffer = (char *)smalloc (BUFSIZE);
417 while (1) {
418 int loop = 1;
420 conn_t *connection;
422 pthread_mutex_lock (&conns_mutex);
424 while (NULL == conns.head) {
425 pthread_cond_wait (&conn_available, &conns_mutex);
426 }
428 connection = conns.head;
429 conns.head = conns.head->next;
431 if (NULL == conns.head) {
432 conns.tail = NULL;
433 }
435 this->socket = connection->socket;
437 pthread_mutex_unlock (&conns_mutex);
439 connection->buffer = buffer;
440 connection->idx = 0;
442 { /* put the socket in non-blocking mode */
443 int flags = 0;
445 errno = 0;
446 if (-1 == fcntl (connection->socket, F_GETFL, &flags)) {
447 syslog (LOG_ERR, "fcntl() failed: %s", strerror (errno));
448 loop = 0;
449 }
451 errno = 0;
452 if (-1 == fcntl (connection->socket, F_SETFL, flags | O_NONBLOCK)) {
453 syslog (LOG_ERR, "fcntl() failed: %s", strerror (errno));
454 loop = 0;
455 }
456 }
458 while (loop) {
459 char *line = read_line (connection);
461 if (NULL == line) {
462 loop = 0;
463 break;
464 }
466 if ('\0' == line[0]) {
467 free (line);
468 continue;
469 }
471 if (':' != line[1]) {
472 syslog (LOG_ERR, "email: syntax error in line '%s'", line);
473 free (line);
474 continue;
475 }
477 if ('e' == line[0]) { /* e:<type>:<bytes> */
478 char *ptr = NULL;
479 char *type = strtok_r (line + 2, ":", &ptr);
480 char *tmp = strtok_r (NULL, ":", &ptr);
481 int bytes = 0;
483 if (NULL == tmp) {
484 syslog (LOG_ERR, "email: syntax error in line '%s'", line);
485 free (line);
486 continue;
487 }
489 bytes = atoi (tmp);
491 pthread_mutex_lock (&count_mutex);
492 type_list_incr (&count, type, 1);
493 pthread_mutex_unlock (&count_mutex);
495 pthread_mutex_lock (&size_mutex);
496 type_list_incr (&size, type, bytes);
497 pthread_mutex_unlock (&size_mutex);
498 }
499 else if ('s' == line[0]) { /* s:<value> */
500 pthread_mutex_lock (&score_mutex);
501 score = (score * (double)score_count + atof (line + 2))
502 / (double)(score_count + 1);
503 ++score_count;
504 pthread_mutex_unlock (&score_mutex);
505 }
506 else if ('c' == line[0]) { /* c:<type1>[,<type2>,...] */
507 char *ptr = NULL;
508 char *type = strtok_r (line + 2, ",", &ptr);
510 do {
511 pthread_mutex_lock (&check_mutex);
512 type_list_incr (&check, type, 1);
513 pthread_mutex_unlock (&check_mutex);
514 } while (NULL != (type = strtok_r (NULL, ",", &ptr)));
515 }
516 else {
517 syslog (LOG_ERR, "email: unknown type '%c'", line[0]);
518 }
520 free (line);
521 } /* while (loop) */
523 close (connection->socket);
525 free (connection);
527 pthread_mutex_lock (&available_mutex);
528 ++available_collectors;
529 pthread_mutex_unlock (&available_mutex);
531 pthread_cond_signal (&collector_available);
532 } /* while (1) */
534 free (buffer);
535 pthread_exit ((void *)0);
536 } /* void *collect (void *) */
538 static void *open_connection (void *arg)
539 {
540 struct sockaddr_un addr;
542 /* create UNIX socket */
543 errno = 0;
544 if (-1 == (connector_socket = socket (PF_UNIX, SOCK_STREAM, 0))) {
545 disabled = 1;
546 syslog (LOG_ERR, "socket() failed: %s", strerror (errno));
547 pthread_exit ((void *)1);
548 }
550 addr.sun_family = AF_UNIX;
552 strncpy (addr.sun_path, SOCK_PATH, (size_t)(UNIX_PATH_MAX - 1));
553 addr.sun_path[UNIX_PATH_MAX - 1] = '\0';
554 unlink (addr.sun_path);
556 errno = 0;
557 if (-1 == bind (connector_socket, (struct sockaddr *)&addr,
558 offsetof (struct sockaddr_un, sun_path)
559 + strlen(addr.sun_path))) {
560 disabled = 1;
561 syslog (LOG_ERR, "bind() failed: %s", strerror (errno));
562 pthread_exit ((void *)1);
563 }
565 errno = 0;
566 if (-1 == listen (connector_socket, 5)) {
567 disabled = 1;
568 syslog (LOG_ERR, "listen() failed: %s", strerror (errno));
569 pthread_exit ((void *)1);
570 }
572 if ((uid_t)0 == geteuid ()) {
573 struct group *grp;
575 errno = 0;
576 if (NULL != (grp = getgrnam (sock_group))) {
577 errno = 0;
578 if (0 != chown (SOCK_PATH, (uid_t)-1, grp->gr_gid)) {
579 syslog (LOG_WARNING, "chown() failed: %s", strerror (errno));
580 }
581 }
582 else {
583 syslog (LOG_WARNING, "getgrnam() failed: %s", strerror (errno));
584 }
585 }
586 else {
587 syslog (LOG_WARNING, "not running as root");
588 }
590 errno = 0;
591 if (0 != chmod (SOCK_PATH, sock_perms)) {
592 syslog (LOG_WARNING, "chmod() failed: %s", strerror (errno));
593 }
595 { /* initialize collector threads */
596 int i = 0;
597 int err = 0;
599 pthread_attr_t ptattr;
601 conns.head = NULL;
602 conns.tail = NULL;
604 pthread_attr_init (&ptattr);
605 pthread_attr_setdetachstate (&ptattr, PTHREAD_CREATE_DETACHED);
607 available_collectors = max_conns;
609 collectors =
610 (collector_t **)smalloc (max_conns * sizeof (collector_t *));
612 for (i = 0; i < max_conns; ++i) {
613 collectors[i] = (collector_t *)smalloc (sizeof (collector_t));
614 collectors[i]->socket = 0;
616 if (0 != (err = pthread_create (&collectors[i]->thread, &ptattr,
617 collect, collectors[i]))) {
618 syslog (LOG_ERR, "pthread_create() failed: %s",
619 strerror (err));
620 }
621 }
623 pthread_attr_destroy (&ptattr);
624 }
626 while (1) {
627 int remote = 0;
629 conn_t *connection;
631 pthread_mutex_lock (&available_mutex);
633 while (0 == available_collectors) {
634 pthread_cond_wait (&collector_available, &available_mutex);
635 }
637 --available_collectors;
639 pthread_mutex_unlock (&available_mutex);
641 do {
642 errno = 0;
643 if (-1 == (remote = accept (connector_socket, NULL, NULL))) {
644 if (EINTR != errno) {
645 disabled = 1;
646 syslog (LOG_ERR, "accept() failed: %s", strerror (errno));
647 pthread_exit ((void *)1);
648 }
649 }
650 } while (EINTR == errno);
652 connection = (conn_t *)smalloc (sizeof (conn_t));
654 connection->socket = remote;
655 connection->next = NULL;
657 pthread_mutex_lock (&conns_mutex);
659 if (NULL == conns.head) {
660 conns.head = connection;
661 conns.tail = connection;
662 }
663 else {
664 conns.tail->next = connection;
665 conns.tail = conns.tail->next;
666 }
668 pthread_mutex_unlock (&conns_mutex);
670 pthread_cond_signal (&conn_available);
671 }
672 pthread_exit ((void *)0);
673 } /* void *open_connection (void *) */
674 #endif /* EMAIL_HAVE_READ */
676 static void email_init (void)
677 {
678 #if EMAIL_HAVE_READ
679 int err = 0;
681 if (0 != (err = pthread_create (&connector, NULL,
682 open_connection, NULL))) {
683 disabled = 1;
684 syslog (LOG_ERR, "pthread_create() failed: %s", strerror (err));
685 return;
686 }
687 #endif /* EMAIL_HAVE_READ */
688 return;
689 } /* static void email_init (void) */
691 #if EMAIL_HAVE_READ
692 static void email_shutdown (void)
693 {
694 int i = 0;
696 if (disabled)
697 return;
699 close (connector_socket);
700 pthread_kill (connector, SIGTERM);
702 /* don't allow any more connections to be processed */
703 pthread_mutex_lock (&conns_mutex);
705 for (i = 0; i < max_conns; ++i) {
706 close (collectors[i]->socket);
707 pthread_kill (collectors[i]->thread, SIGTERM);
708 }
710 pthread_mutex_unlock (&conns_mutex);
712 unlink (SOCK_PATH);
713 return;
714 } /* static void email_shutdown (void) */
715 #endif /* EMAIL_HAVE_READ */
717 static void count_write (char *host, char *inst, char *val)
718 {
719 char file[BUFSIZE] = "";
720 int len = 0;
722 len = snprintf (file, BUFSIZE, COUNT_FILE, inst);
723 if ((len < 0) || (len >= BUFSIZE))
724 return;
726 rrd_update_file (host, file, val, count_ds_def, count_ds_num);
727 return;
728 } /* static void email_write (char *host, char *inst, char *val) */
730 static void size_write (char *host, char *inst, char *val)
731 {
732 char file[BUFSIZE] = "";
733 int len = 0;
735 len = snprintf (file, BUFSIZE, SIZE_FILE, inst);
736 if ((len < 0) || (len >= BUFSIZE))
737 return;
739 rrd_update_file (host, file, val, size_ds_def, size_ds_num);
740 return;
741 } /* static void size_write (char *host, char *inst, char *val) */
743 static void score_write (char *host, char *inst, char *val)
744 {
745 rrd_update_file (host, SCORE_FILE, val, score_ds_def, score_ds_num);
746 return;
747 } /* static void score_write (char *host, char *inst, char *val) */
749 static void check_write (char *host, char *inst, char *val)
750 {
751 char file[BUFSIZE] = "";
752 int len = 0;
754 len = snprintf (file, BUFSIZE, CHECK_FILE, inst);
755 if ((len < 0) || (len >= BUFSIZE))
756 return;
758 rrd_update_file (host, file, val, check_ds_def, check_ds_num);
759 return;
760 } /* static void check_write (char *host, char *inst, char *val) */
762 #if EMAIL_HAVE_READ
763 static void type_submit (char *plugin, char *inst, int value)
764 {
765 char buf[BUFSIZE] = "";
766 int len = 0;
768 if (0 == value)
769 return;
771 len = snprintf (buf, BUFSIZE, "%u:%i", (unsigned int)curtime, value);
772 if ((len < 0) || (len >= BUFSIZE))
773 return;
775 plugin_submit (plugin, inst, buf);
776 return;
777 } /* static void type_submit (char *, char *, int) */
779 static void score_submit (double value)
780 {
781 char buf[BUFSIZE] = "";
782 int len = 0;
784 if (0.0 == value)
785 return;
787 len = snprintf (buf, BUFSIZE, "%u:%.2f", (unsigned int)curtime, value);
788 if ((len < 0) || (len >= BUFSIZE))
789 return;
791 plugin_submit ("email_spam_score", NULL, buf);
792 return;
793 }
795 static void email_read (void)
796 {
797 type_t *ptr;
799 if (disabled)
800 return;
802 pthread_mutex_lock (&count_mutex);
804 for (ptr = count.head; NULL != ptr; ptr = ptr->next) {
805 type_submit ("email_count", ptr->name, ptr->value);
806 ptr->value = 0;
807 }
809 pthread_mutex_unlock (&count_mutex);
811 pthread_mutex_lock (&size_mutex);
813 for (ptr = size.head; NULL != ptr; ptr = ptr->next) {
814 type_submit ("email_size", ptr->name, ptr->value);
815 ptr->value = 0;
816 }
818 pthread_mutex_unlock (&size_mutex);
820 pthread_mutex_lock (&score_mutex);
822 score_submit (score);
823 score = 0.0;
824 score_count = 0;
826 pthread_mutex_unlock (&score_mutex);
828 pthread_mutex_lock (&check_mutex);
830 for (ptr = check.head; NULL != ptr; ptr = ptr->next) {
831 type_submit ("email_spam_check", ptr->name, ptr->value);
832 ptr->value = 0;
833 }
835 pthread_mutex_unlock (&check_mutex);
836 return;
837 } /* static void read (void) */
838 #else /* if !EMAIL_HAVE_READ */
839 # define email_read NULL
840 #endif
842 void module_register (void)
843 {
844 plugin_register (MODULE_NAME, email_init, email_read, NULL);
845 plugin_register ("email_count", NULL, NULL, count_write);
846 plugin_register ("email_size", NULL, NULL, size_write);
847 plugin_register ("email_spam_score", NULL, NULL, score_write);
848 plugin_register ("email_spam_check", NULL, NULL, check_write);
849 #if EMAIL_HAVE_READ
850 plugin_register_shutdown (MODULE_NAME, email_shutdown);
851 cf_register (MODULE_NAME, email_config, config_keys, config_keys_num);
852 #endif /* EMAIL_HAVE_READ */
853 return;
854 } /* void module_register (void) */
856 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */