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