Code

80cb4bd6b22f49134fec440dba889e734019cb71
[collectd.git] / 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  **/
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 #if HAVE_GRP_H
66 #       include <grp.h>
67 #endif /* HAVE_GRP_H */
69 #define MODULE_NAME "email"
71 /* 256 bytes ought to be enough for anybody ;-) */
72 #define BUFSIZE 256
74 #define SOCK_PATH "/tmp/.collectd-email"
75 #define MAX_CONNS 5
76 #define MAX_CONNS_LIMIT 16384
78 /*
79  * Private data structures
80  */
81 #if EMAIL_HAVE_READ
82 /* linked list of email and check types */
83 typedef struct type {
84         char        *name;
85         int         value;
86         struct type *next;
87 } type_t;
89 typedef struct {
90         type_t *head;
91         type_t *tail;
92 } type_list_t;
94 /* linked list of collector thread control information */
95 typedef struct collector {
96         pthread_t thread;
98         /* socket to read data from */
99         int socket;
101         /* buffer to read data to */
102         char buffer[BUFSIZE];
103         int  idx; /* current position in buffer */
105         struct collector *next;
106 } collector_t;
108 typedef struct {
109         collector_t *head;
110         collector_t *tail;
111 } collector_list_t;
112 #endif /* EMAIL_HAVE_READ */
114 /*
115  * Private variables
116  */
117 #if EMAIL_HAVE_READ
118 /* valid configuration file keys */
119 static char *config_keys[] =
121         "SocketGroup",
122         "SocketPerms",
123         "MaxConns",
124         NULL
125 };
126 static int config_keys_num = 3;
128 /* socket configuration */
129 static char *sock_group = COLLECTD_GRP_NAME;
130 static int  sock_perms  = S_IRWXU | S_IRWXG;
131 static int  max_conns   = MAX_CONNS;
133 /* state of the plugin */
134 static int disabled = 0;
136 /* thread managing "client" connections */
137 static pthread_t connector;
138 static int connector_socket;
140 /* tell the connector thread that a collector is available */
141 static pthread_cond_t collector_available = PTHREAD_COND_INITIALIZER;
143 /* collector threads that are in use */
144 static pthread_mutex_t active_mutex = PTHREAD_MUTEX_INITIALIZER;
145 static collector_list_t active;
147 /* collector threads that are available for use */
148 static pthread_mutex_t available_mutex = PTHREAD_MUTEX_INITIALIZER;
149 static collector_list_t available;
151 static pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER;
152 static type_list_t count;
154 static pthread_mutex_t size_mutex = PTHREAD_MUTEX_INITIALIZER;
155 static type_list_t size;
157 static pthread_mutex_t score_mutex = PTHREAD_MUTEX_INITIALIZER;
158 static double score;
159 static int score_count;
161 static pthread_mutex_t check_mutex = PTHREAD_MUTEX_INITIALIZER;
162 static type_list_t check;
163 #endif /* EMAIL_HAVE_READ */
165 #define COUNT_FILE "email/email-%s.rrd"
166 static char *count_ds_def[] =
168         "DS:count:GAUGE:"COLLECTD_HEARTBEAT":0:U",
169         NULL
170 };
171 static int count_ds_num = 1;
173 #define SIZE_FILE  "email/email_size-%s.rrd"
174 static char *size_ds_def[] =
176         "DS:size:GAUGE:"COLLECTD_HEARTBEAT":0:U",
177         NULL
178 };
179 static int size_ds_num = 1;
181 #define SCORE_FILE "email/spam_score.rrd"
182 static char *score_ds_def[] =
184         "DS:score:GAUGE:"COLLECTD_HEARTBEAT":U:U",
185         NULL
186 };
187 static int score_ds_num = 1;
189 #define CHECK_FILE "email/spam_check-%s.rrd"
190 static char *check_ds_def[] =
192         "DS:hits:GAUGE:"COLLECTD_HEARTBEAT":0:U",
193         NULL
194 };
195 static int check_ds_num = 1;
197 #if EMAIL_HAVE_READ
198 static int email_config (char *key, char *value)
200         if (0 == strcasecmp (key, "SocketGroup")) {
201                 sock_group = sstrdup (value);
202         }
203         else if (0 == strcasecmp (key, "SocketPerms")) {
204                 /* the user is responsible for providing reasonable values */
205                 sock_perms = (int)strtol (value, NULL, 0);
206         }
207         else if (0 == strcasecmp (key, "MaxConns")) {
208                 long int tmp = strtol (value, NULL, 0);
210                 if (tmp < 1) {
211                         fprintf (stderr, "email plugin: `MaxConns' was set to invalid "
212                                         "value %li, will use default %i.\n",
213                                         tmp, MAX_CONNS);
214                         max_conns = MAX_CONNS;
215                 }
216                 else if (tmp > MAX_CONNS_LIMIT) {
217                         fprintf (stderr, "email plugin: `MaxConns' was set to invalid "
218                                         "value %li, will use hardcoded limit %i.\n",
219                                         tmp, MAX_CONNS_LIMIT);
220                         max_conns = MAX_CONNS_LIMIT;
221                 }
222                 else {
223                         max_conns = (int)tmp;
224                 }
225         }
226         else {
227                 return -1;
228         }
229         return 0;
230 } /* static int email_config (char *, char *) */
232 /* Increment the value of the given name in the given list by incr. */
233 static void type_list_incr (type_list_t *list, char *name, int incr)
235         if (NULL == list->head) {
236                 list->head = (type_t *)smalloc (sizeof (type_t));
238                 list->head->name  = sstrdup (name);
239                 list->head->value = incr;
240                 list->head->next  = NULL;
242                 list->tail = list->head;
243         }
244         else {
245                 type_t *ptr;
247                 for (ptr = list->head; NULL != ptr; ptr = ptr->next) {
248                         if (0 == strcmp (name, ptr->name))
249                                 break;
250                 }
252                 if (NULL == ptr) {
253                         list->tail->next = (type_t *)smalloc (sizeof (type_t));
254                         list->tail = list->tail->next;
256                         list->tail->name  = sstrdup (name);
257                         list->tail->value = incr;
258                         list->tail->next  = NULL;
259                 }
260                 else {
261                         ptr->value += incr;
262                 }
263         }
264         return;
265 } /* static void type_list_incr (type_list_t *, char *) */
267 /* Read a single character from the socket. If an error occurs or end-of-file
268  * is reached return '\0'. */
269 char read_char (collector_t *src)
271         char ret = '\0';
273         fd_set fdset;
275         FD_ZERO (&fdset);
276         FD_SET (src->socket, &fdset);
278         if (-1 == select (src->socket + 1, &fdset, NULL, NULL, NULL)) {
279                 syslog (LOG_ERR, "select() failed: %s", strerror (errno));
280                 return '\0';
281         }
283         assert (FD_ISSET (src->socket, &fdset));
285         do {
286                 ssize_t len = 0;
288                 errno = 0;
289                 if (0 > (len = read (src->socket, (void *)&ret, 1))) {
290                         if (EINTR != errno) {
291                                 syslog (LOG_ERR, "read() failed: %s", strerror (errno));
292                                 return '\0';
293                         }
294                 }
296                 if (0 == len)
297                         return '\0';
298         } while (EINTR == errno);
299         return ret;
300 } /* char read_char (collector_t *) */
302 /* Read a single line (terminated by '\n') from the the socket.
303  *
304  * The return value is zero terminated and does not contain any newline
305  * characters. In case that no complete line is available (non-blocking mode
306  * should be enabled) an empty string is returned.
307  *
308  * If an error occurs or end-of-file is reached return NULL.
309  *
310  * IMPORTANT NOTE: If there is no newline character found in BUFSIZE
311  * characters of the input stream, the line will will be ignored! By
312  * definition we should not get any longer input lines, thus this is
313  * acceptable in this case ;-) */
314 char *read_line (collector_t *src)
316         int  i = 0;
317         char *ret;
319         assert (BUFSIZE > src->idx);
321         for (i = 0; i < src->idx; ++i) {
322                 if ('\n' == src->buffer[i])
323                         break;
324         }
326         if ('\n' != src->buffer[i]) {
327                 fd_set fdset;
328         
329                 ssize_t len = 0;
331                 FD_ZERO (&fdset);
332                 FD_SET (src->socket, &fdset);
334                 if (-1 == select (src->socket + 1, &fdset, NULL, NULL, NULL)) {
335                         syslog (LOG_ERR, "select() failed: %s", strerror (errno));
336                         return NULL;
337                 }
339                 assert (FD_ISSET (src->socket, &fdset));
341                 do {
342                         errno = 0;
343                         if (0 > (len = read (src->socket,
344                                                         (void *)(&(src->buffer[0]) + src->idx),
345                                                         BUFSIZE - src->idx))) {
346                                 if (EINTR != errno) {
347                                         syslog (LOG_ERR, "read() failed: %s", strerror (errno));
348                                         return NULL;
349                                 }
350                         }
352                         if (0 == len)
353                                 return NULL;
354                 } while (EINTR == errno);
356                 src->idx += len;
358                 for (i = src->idx - len; i < src->idx; ++i) {
359                         if ('\n' == src->buffer[i])
360                                 break;
361                 }
363                 if ('\n' != src->buffer[i]) {
364                         ret = (char *)smalloc (1);
366                         ret[0] = '\0';
368                         if (BUFSIZE == src->idx) { /* no space left in buffer */
369                                 while ('\n' != read_char (src))
370                                         /* ignore complete line */;
372                                 src->idx = 0;
373                         }
374                         return ret;
375                 }
376         }
378         ret = (char *)smalloc (i + 1);
379         memcpy (ret, &(src->buffer[0]), i + 1);
380         ret[i] = '\0';
382         src->idx -= (i + 1);
384         if (0 == src->idx)
385                 src->buffer[0] = '\0';
386         else
387                 memmove (&(src->buffer[0]), &(src->buffer[i + 1]), src->idx);
388         return ret;
389 } /* char *read_line (collector_t *) */
391 static void *collect (void *arg)
393         collector_t *this = (collector_t *)arg;
394         
395         int loop = 1;
397         { /* put the socket in non-blocking mode */
398                 int flags = 0;
400                 errno = 0;
401                 if (-1 == fcntl (this->socket, F_GETFL, &flags)) {
402                         syslog (LOG_ERR, "fcntl() failed: %s", strerror (errno));
403                         loop = 0;
404                 }
406                 errno = 0;
407                 if (-1 == fcntl (this->socket, F_SETFL, flags | O_NONBLOCK)) {
408                         syslog (LOG_ERR, "fcntl() failed: %s", strerror (errno));
409                         loop = 0;
410                 }
411         }
413         while (loop) {
414                 char *line = read_line (this);
416                 if (NULL == line) {
417                         loop = 0;
418                         break;
419                 }
421                 if ('\0' == line[0]) {
422                         free (line);
423                         continue;
424                 }
426                 if (':' != line[1]) {
427                         syslog (LOG_ERR, "email: syntax error in line '%s'", line);
428                         free (line);
429                         continue;
430                 }
432                 if ('e' == line[0]) { /* e:<type>:<bytes> */
433                         char *ptr  = NULL;
434                         char *type = strtok_r (line + 2, ":", &ptr);
435                         char *tmp  = strtok_r (NULL, ":", &ptr);
436                         int  bytes = 0;
438                         if (NULL == tmp) {
439                                 syslog (LOG_ERR, "email: syntax error in line '%s'", line);
440                                 free (line);
441                                 continue;
442                         }
444                         bytes = atoi (tmp);
446                         pthread_mutex_lock (&count_mutex);
447                         type_list_incr (&count, type, 1);
448                         pthread_mutex_unlock (&count_mutex);
450                         pthread_mutex_lock (&size_mutex);
451                         type_list_incr (&size, type, bytes);
452                         pthread_mutex_unlock (&size_mutex);
453                 }
454                 else if ('s' == line[0]) { /* s:<value> */
455                         pthread_mutex_lock (&score_mutex);
456                         score = (score * (double)score_count + atof (line + 2))
457                                         / (double)(score_count + 1);
458                         ++score_count;
459                         pthread_mutex_unlock (&score_mutex);
460                 }
461                 else if ('c' == line[0]) { /* c:<type1>[,<type2>,...] */
462                         char *ptr  = NULL;
463                         char *type = strtok_r (line + 2, ",", &ptr);
465                         do {
466                                 pthread_mutex_lock (&check_mutex);
467                                 type_list_incr (&check, type, 1);
468                                 pthread_mutex_unlock (&check_mutex);
469                         } while (NULL != (type = strtok_r (NULL, ",", &ptr)));
470                 }
471                 else {
472                         syslog (LOG_ERR, "email: unknown type '%c'", line[0]);
473                 }
475                 free (line);
476         }
478         /* put this thread back into the available list */
479         pthread_mutex_lock (&active_mutex);
480         {
481                 collector_t *last;
482                 collector_t *ptr;
484                 last = NULL;
486                 for (ptr = active.head; NULL != ptr; last = ptr, ptr = ptr->next) {
487                         if (0 != pthread_equal (ptr->thread, this->thread))
488                                 break;
489                 }
491                 /* the current thread _has_ to be in the active list */
492                 assert (NULL != ptr);
494                 if (NULL == last) {
495                         active.head = ptr->next;
496                 }
497                 else {
498                         last->next = ptr->next;
500                         if (NULL == last->next) {
501                                 active.tail = last;
502                         }
503                 }
504         }
505         pthread_mutex_unlock (&active_mutex);
507         this->next = NULL;
509         pthread_mutex_lock (&available_mutex);
511         if (NULL == available.head) {
512                 available.head = this;
513                 available.tail = this;
514         }
515         else {
516                 available.tail->next = this;
517                 available.tail = this;
518         }
520         pthread_mutex_unlock (&available_mutex);
522         pthread_cond_signal (&collector_available);
523         pthread_exit ((void *)0);
524 } /* void *collect (void *) */
526 static void *open_connection (void *arg)
528         struct sockaddr_un addr;
530         /* create UNIX socket */
531         errno = 0;
532         if (-1 == (connector_socket = socket (PF_UNIX, SOCK_STREAM, 0))) {
533                 disabled = 1;
534                 syslog (LOG_ERR, "socket() failed: %s", strerror (errno));
535                 pthread_exit ((void *)1);
536         }
538         addr.sun_family = AF_UNIX;
540         strncpy (addr.sun_path, SOCK_PATH, (size_t)(UNIX_PATH_MAX - 1));
541         addr.sun_path[UNIX_PATH_MAX - 1] = '\0';
542         unlink (addr.sun_path);
544         errno = 0;
545         if (-1 == bind (connector_socket, (struct sockaddr *)&addr,
546                                 offsetof (struct sockaddr_un, sun_path)
547                                         + strlen(addr.sun_path))) {
548                 disabled = 1;
549                 syslog (LOG_ERR, "bind() failed: %s", strerror (errno));
550                 pthread_exit ((void *)1);
551         }
553         errno = 0;
554         if (-1 == listen (connector_socket, 5)) {
555                 disabled = 1;
556                 syslog (LOG_ERR, "listen() failed: %s", strerror (errno));
557                 pthread_exit ((void *)1);
558         }
560         if ((uid_t)0 == geteuid ()) {
561                 struct group *grp;
563                 errno = 0;
564                 if (NULL != (grp = getgrnam (sock_group))) {
565                         errno = 0;
566                         if (0 != chown (SOCK_PATH, (uid_t)-1, grp->gr_gid)) {
567                                 syslog (LOG_WARNING, "chown() failed: %s", strerror (errno));
568                         }
569                 }
570                 else {
571                         syslog (LOG_WARNING, "getgrnam() failed: %s", strerror (errno));
572                 }
573         }
574         else {
575                 syslog (LOG_WARNING, "not running as root");
576         }
578         errno = 0;
579         if (0 != chmod (SOCK_PATH, sock_perms)) {
580                 syslog (LOG_WARNING, "chmod() failed: %s", strerror (errno));
581         }
583         { /* initialize queue of available threads */
584                 int i = 0;
586                 collector_t *last;
588                 active.head = NULL;
589                 active.tail = NULL;
591                 available.head = (collector_t *)smalloc (sizeof (collector_t));
592                 available.tail = available.head;
593                 available.tail->next = NULL;
595                 last = available.head;
597                 for (i = 1; i < max_conns; ++i) {
598                         last->next = (collector_t *)smalloc (sizeof (collector_t));
599                         last = last->next;
600                         available.tail = last;
601                         available.tail->next = NULL;
602                 }
603         }
605         while (1) {
606                 int remote = 0;
607                 int err    = 0;
609                 collector_t *collector;
611                 pthread_attr_t ptattr;
613                 pthread_mutex_lock (&available_mutex);
614                 while (NULL == available.head) {
615                         pthread_cond_wait (&collector_available, &available_mutex);
616                 }
617                 pthread_mutex_unlock (&available_mutex);
619                 do {
620                         errno = 0;
621                         if (-1 == (remote = accept (connector_socket, NULL, NULL))) {
622                                 if (EINTR != errno) {
623                                         disabled = 1;
624                                         syslog (LOG_ERR, "accept() failed: %s", strerror (errno));
625                                         pthread_exit ((void *)1);
626                                 }
627                         }
628                 } while (EINTR == errno);
630                 /* assign connection to next available thread */
631                 pthread_mutex_lock (&available_mutex);
633                 collector = available.head;
634                 collector->socket = remote;
636                 if (available.head == available.tail) {
637                         available.head = NULL;
638                         available.tail = NULL;
639                 }
640                 else {
641                         available.head = available.head->next;
642                 }
644                 pthread_mutex_unlock (&available_mutex);
646                 collector->idx  = 0;
647                 collector->next = NULL;
649                 pthread_attr_init (&ptattr);
650                 pthread_attr_setdetachstate (&ptattr, PTHREAD_CREATE_DETACHED);
652                 if (0 == (err = pthread_create (&collector->thread, &ptattr, collect,
653                                 (void *)collector))) {
654                         pthread_mutex_lock (&active_mutex);
656                         if (NULL == active.head) {
657                                 active.head = collector;
658                                 active.tail = collector;
659                         }
660                         else {
661                                 active.tail->next = collector;
662                                 active.tail = collector;
663                         }
665                         pthread_mutex_unlock (&active_mutex);
666                 }
667                 else {
668                         pthread_mutex_lock (&available_mutex);
670                         if (NULL == available.head) {
671                                 available.head = collector;
672                                 available.tail = collector;
673                         }
674                         else {
675                                 available.tail->next = collector;
676                                 available.tail = collector;
677                         }
679                         pthread_mutex_unlock (&available_mutex);
681                         close (remote);
682                         syslog (LOG_ERR, "pthread_create() failed: %s", strerror (err));
683                 }
685                 pthread_attr_destroy (&ptattr);
686         }
687         pthread_exit ((void *)0);
688 } /* void *open_connection (void *) */
689 #endif /* EMAIL_HAVE_READ */
691 static void email_init (void)
693 #if EMAIL_HAVE_READ
694         int err = 0;
696         if (0 != (err = pthread_create (&connector, NULL,
697                                 open_connection, NULL))) {
698                 disabled = 1;
699                 syslog (LOG_ERR, "pthread_create() failed: %s", strerror (err));
700                 return;
701         }
702 #endif /* EMAIL_HAVE_READ */
703         return;
704 } /* static void email_init (void) */
706 #if EMAIL_HAVE_READ
707 static void email_shutdown (void)
709         collector_t *ptr;
711         if (disabled)
712                 return;
714         close (connector_socket);
715         pthread_kill (connector, SIGTERM);
717         pthread_mutex_lock (&active_mutex);
719         for (ptr = active.head; NULL != ptr; ptr = ptr->next) {
720                 close (ptr->socket);
721                 pthread_kill (ptr->thread, SIGTERM);
722         }
724         pthread_mutex_unlock (&active_mutex);
726         unlink (SOCK_PATH);
727         return;
728 } /* static void email_shutdown (void) */
729 #endif /* EMAIL_HAVE_READ */
731 static void count_write (char *host, char *inst, char *val)
733         char file[BUFSIZE] = "";
734         int  len           = 0;
736         len = snprintf (file, BUFSIZE, COUNT_FILE, inst);
737         if ((len < 0) || (len >= BUFSIZE))
738                 return;
740         rrd_update_file (host, file, val, count_ds_def, count_ds_num);
741         return;
742 } /* static void email_write (char *host, char *inst, char *val) */
744 static void size_write (char *host, char *inst, char *val)
746         char file[BUFSIZE] = "";
747         int  len           = 0;
749         len = snprintf (file, BUFSIZE, SIZE_FILE, inst);
750         if ((len < 0) || (len >= BUFSIZE))
751                 return;
753         rrd_update_file (host, file, val, size_ds_def, size_ds_num);
754         return;
755 } /* static void size_write (char *host, char *inst, char *val) */
757 static void score_write (char *host, char *inst, char *val)
759         rrd_update_file (host, SCORE_FILE, val, score_ds_def, score_ds_num);
760         return;
761 } /* static void score_write (char *host, char *inst, char *val) */
763 static void check_write (char *host, char *inst, char *val)
765         char file[BUFSIZE] = "";
766         int  len           = 0;
768         len = snprintf (file, BUFSIZE, CHECK_FILE, inst);
769         if ((len < 0) || (len >= BUFSIZE))
770                 return;
772         rrd_update_file (host, file, val, check_ds_def, check_ds_num);
773         return;
774 } /* static void check_write (char *host, char *inst, char *val) */
776 #if EMAIL_HAVE_READ
777 static void type_submit (char *plugin, char *inst, int value)
779         char buf[BUFSIZE] = "";
780         int  len          = 0;
782         if (0 == value)
783                 return;
785         len = snprintf (buf, BUFSIZE, "%u:%i", (unsigned int)curtime, value);
786         if ((len < 0) || (len >= BUFSIZE))
787                 return;
789         plugin_submit (plugin, inst, buf);
790         return;
791 } /* static void type_submit (char *, char *, int) */
793 static void score_submit (double value)
795         char buf[BUFSIZE] = "";
796         int  len          = 0;
798         if (0.0 == value)
799                 return;
801         len = snprintf (buf, BUFSIZE, "%u:%.2f", (unsigned int)curtime, value);
802         if ((len < 0) || (len >= BUFSIZE))
803                 return;
805         plugin_submit ("email_spam_score", NULL, buf);
806         return;
809 static void email_read (void)
811         type_t *ptr;
813         if (disabled)
814                 return;
816         pthread_mutex_lock (&count_mutex);
818         for (ptr = count.head; NULL != ptr; ptr = ptr->next) {
819                 type_submit ("email_count", ptr->name, ptr->value);
820                 ptr->value = 0;
821         }
823         pthread_mutex_unlock (&count_mutex);
825         pthread_mutex_lock (&size_mutex);
827         for (ptr = size.head; NULL != ptr; ptr = ptr->next) {
828                 type_submit ("email_size", ptr->name, ptr->value);
829                 ptr->value = 0;
830         }
832         pthread_mutex_unlock (&size_mutex);
834         pthread_mutex_lock (&score_mutex);
836         score_submit (score);
837         score = 0.0;
838         score_count = 0;
840         pthread_mutex_unlock (&score_mutex);
842         pthread_mutex_lock (&check_mutex);
844         for (ptr = check.head; NULL != ptr; ptr = ptr->next) {
845                 type_submit ("email_spam_check", ptr->name, ptr->value);
846                 ptr->value = 0;
847         }
849         pthread_mutex_unlock (&check_mutex);
850         return;
851 } /* static void read (void) */
852 #else /* if !EMAIL_HAVE_READ */
853 # define email_read NULL
854 #endif
856 void module_register (void)
858         plugin_register (MODULE_NAME, email_init, email_read, NULL);
859         plugin_register ("email_count", NULL, NULL, count_write);
860         plugin_register ("email_size", NULL, NULL, size_write);
861         plugin_register ("email_spam_score", NULL, NULL, score_write);
862         plugin_register ("email_spam_check", NULL, NULL, check_write);
863 #if EMAIL_HAVE_READ
864         plugin_register_shutdown (MODULE_NAME, email_shutdown);
865         cf_register (MODULE_NAME, email_config, config_keys, config_keys_num);
866 #endif /* EMAIL_HAVE_READ */
867         return;
868 } /* void module_register (void) */
870 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */