1 /**
2 * collectd - src/unixsock.c
3 * Copyright (C) 2007 Florian octo Forster
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; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Author:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
25 #include "configfile.h"
27 /* Folks without pthread will need to disable this plugin. */
28 #include <pthread.h>
30 #include <sys/socket.h>
31 #include <sys/un.h>
32 #include <sys/poll.h>
34 #include <grp.h>
36 #ifndef UNIX_PATH_MAX
37 # define UNIX_PATH_MAX sizeof (((struct sockaddr_un *)0)->sun_path)
38 #endif
40 #define US_DEFAULT_PATH PREFIX"/var/run/"PACKAGE_NAME"-unixsock"
42 /*
43 * Private data structures
44 */
45 /* linked list of cached values */
46 typedef struct value_cache_s
47 {
48 char name[4*DATA_MAX_NAME_LEN];
49 int values_num;
50 gauge_t *gauge;
51 counter_t *counter;
52 const data_set_t *ds;
53 time_t time;
54 struct value_cache_s *next;
55 } value_cache_t;
57 /*
58 * Private variables
59 */
60 /* valid configuration file keys */
61 static const char *config_keys[] =
62 {
63 "SocketFile",
64 "SocketGroup",
65 "SocketPerms",
66 NULL
67 };
68 static int config_keys_num = 3;
70 static int loop = 0;
72 /* socket configuration */
73 static int sock_fd = -1;
74 static char *sock_file = NULL;
75 static char *sock_group = NULL;
76 static int sock_perms = S_IRWXU | S_IRWXG;
78 static pthread_t listen_thread = (pthread_t) 0;
80 /* Linked list and auxilliary variables for saving values */
81 static value_cache_t *cache_head = NULL;
82 static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
83 static unsigned int cache_oldest = UINT_MAX;
85 /*
86 * Functions
87 */
88 static int parse_identifier (char *str, char **ret_host,
89 char **ret_plugin, char **ret_plugin_instance,
90 char **ret_type, char **ret_type_instance)
91 {
92 char *hostname = NULL;
93 char *plugin = NULL;
94 char *plugin_instance = NULL;
95 char *type = NULL;
96 char *type_instance = NULL;
98 hostname = str;
99 if (hostname == NULL)
100 return (-1);
102 plugin = strchr (hostname, '/');
103 if (plugin == NULL)
104 return (-1);
105 *plugin = '\0'; plugin++;
107 type = strchr (plugin, '/');
108 if (type == NULL)
109 return (-1);
110 *type = '\0'; type++;
112 plugin_instance = strchr (plugin, '-');
113 if (plugin_instance != NULL)
114 {
115 *plugin_instance = '\0';
116 plugin_instance++;
117 }
119 type_instance = strchr (type, '-');
120 if (type_instance != NULL)
121 {
122 *type_instance = '\0';
123 type_instance++;
124 }
126 *ret_host = hostname;
127 *ret_plugin = plugin;
128 *ret_plugin_instance = plugin_instance;
129 *ret_type = type;
130 *ret_type_instance = type_instance;
131 return (0);
132 } /* int parse_identifier */
134 static value_cache_t *cache_search (const char *name)
135 {
136 value_cache_t *vc;
138 for (vc = cache_head; vc != NULL; vc = vc->next)
139 {
140 if (strcmp (vc->name, name) == 0)
141 break;
142 } /* for vc = cache_head .. NULL */
144 return (vc);
145 } /* value_cache_t *cache_search */
147 static int cache_alloc_name (char *ret, int ret_len,
148 const char *hostname,
149 const char *plugin, const char *plugin_instance,
150 const char *type, const char *type_instance)
151 {
152 int status;
154 assert (plugin != NULL);
155 assert (type != NULL);
157 if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
158 {
159 if ((type_instance == NULL) || (strlen (type_instance) == 0))
160 status = snprintf (ret, ret_len, "%s/%s/%s",
161 hostname, plugin, type);
162 else
163 status = snprintf (ret, ret_len, "%s/%s/%s-%s",
164 hostname, plugin, type, type_instance);
165 }
166 else
167 {
168 if ((type_instance == NULL) || (strlen (type_instance) == 0))
169 status = snprintf (ret, ret_len, "%s/%s-%s/%s",
170 hostname, plugin, plugin_instance, type);
171 else
172 status = snprintf (ret, ret_len, "%s/%s-%s/%s-%s",
173 hostname, plugin, plugin_instance, type, type_instance);
174 }
176 if ((status < 1) || (status >= ret_len))
177 return (-1);
178 return (0);
179 } /* int cache_alloc_name */
181 static int cache_insert (const data_set_t *ds, const value_list_t *vl)
182 {
183 /* We're called from `cache_update' so we don't need to lock the mutex */
184 value_cache_t *vc;
185 int i;
187 DEBUG ("ds->ds_num = %i; vl->values_len = %i;",
188 ds->ds_num, vl->values_len);
189 assert (ds->ds_num == vl->values_len);
191 vc = (value_cache_t *) malloc (sizeof (value_cache_t));
192 if (vc == NULL)
193 {
194 char errbuf[1024];
195 pthread_mutex_unlock (&cache_lock);
196 ERROR ("unixsock plugin: malloc failed: %s",
197 sstrerror (errno, errbuf, sizeof (errbuf)));
198 return (-1);
199 }
201 vc->gauge = (gauge_t *) malloc (sizeof (gauge_t) * vl->values_len);
202 if (vc->gauge == NULL)
203 {
204 char errbuf[1024];
205 pthread_mutex_unlock (&cache_lock);
206 ERROR ("unixsock plugin: malloc failed: %s",
207 sstrerror (errno, errbuf, sizeof (errbuf)));
208 free (vc);
209 return (-1);
210 }
212 vc->counter = (counter_t *) malloc (sizeof (counter_t) * vl->values_len);
213 if (vc->counter == NULL)
214 {
215 char errbuf[1024];
216 pthread_mutex_unlock (&cache_lock);
217 ERROR ("unixsock plugin: malloc failed: %s",
218 sstrerror (errno, errbuf, sizeof (errbuf)));
219 free (vc->gauge);
220 free (vc);
221 return (-1);
222 }
224 if (cache_alloc_name (vc->name, sizeof (vc->name),
225 vl->host, vl->plugin, vl->plugin_instance,
226 ds->type, vl->type_instance) != 0)
227 {
228 pthread_mutex_unlock (&cache_lock);
229 ERROR ("unixsock plugin: cache_alloc_name failed.");
230 free (vc->counter);
231 free (vc->gauge);
232 free (vc);
233 return (-1);
234 }
236 for (i = 0; i < ds->ds_num; i++)
237 {
238 if (ds->ds[i].type == DS_TYPE_COUNTER)
239 {
240 vc->gauge[i] = 0.0;
241 vc->counter[i] = vl->values[i].counter;
242 }
243 else if (ds->ds[i].type == DS_TYPE_GAUGE)
244 {
245 vc->gauge[i] = vl->values[i].gauge;
246 vc->counter[i] = 0;
247 }
248 else
249 {
250 vc->gauge[i] = 0.0;
251 vc->counter[i] = 0;
252 }
253 }
254 vc->values_num = ds->ds_num;
255 vc->ds = ds;
257 vc->next = cache_head;
258 cache_head = vc;
260 vc->time = vl->time;
261 if (vc->time < cache_oldest)
262 cache_oldest = vc->time;
264 pthread_mutex_unlock (&cache_lock);
265 return (0);
266 } /* int cache_insert */
268 static int cache_update (const data_set_t *ds, const value_list_t *vl)
269 {
270 char name[4*DATA_MAX_NAME_LEN];;
271 value_cache_t *vc;
272 int i;
274 if (cache_alloc_name (name, sizeof (name),
275 vl->host,
276 vl->plugin, vl->plugin_instance,
277 ds->type, vl->type_instance) != 0)
278 return (-1);
280 pthread_mutex_lock (&cache_lock);
282 vc = cache_search (name);
284 if (vc == NULL)
285 return (cache_insert (ds, vl));
287 assert (vc->values_num == ds->ds_num);
288 assert (vc->values_num == vl->values_len);
290 /*
291 * Update the values. This is possibly a lot more that you'd expect
292 * because we honor min and max values and handle counter overflows here.
293 */
294 for (i = 0; i < ds->ds_num; i++)
295 {
296 if (ds->ds[i].type == DS_TYPE_COUNTER)
297 {
298 if (vl->values[i].counter < vc->counter[i])
299 {
300 if (vl->values[i].counter <= 4294967295U)
301 {
302 vc->gauge[i] = ((4294967295U - vl->values[i].counter)
303 + vc->counter[i]) / (vl->time - vc->time);
304 }
305 else
306 {
307 vc->gauge[i] = ((18446744073709551615ULL - vl->values[i].counter)
308 + vc->counter[i]) / (vl->time - vc->time);
309 }
310 }
311 else
312 {
313 vc->gauge[i] = (vl->values[i].counter - vc->counter[i])
314 / (vl->time - vc->time);
315 }
317 vc->counter[i] = vl->values[i].counter;
318 }
319 else if (ds->ds[i].type == DS_TYPE_GAUGE)
320 {
321 vc->gauge[i] = vl->values[i].gauge;
322 vc->counter[i] = 0;
323 }
324 else
325 {
326 vc->gauge[i] = NAN;
327 vc->counter[i] = 0;
328 }
330 if (isnan (vc->gauge[i])
331 || (!isnan (ds->ds[i].min) && (vc->gauge[i] < ds->ds[i].min))
332 || (!isnan (ds->ds[i].max) && (vc->gauge[i] > ds->ds[i].max)))
333 vc->gauge[i] = NAN;
334 } /* for i = 0 .. ds->ds_num */
336 vc->ds = ds;
337 vc->time = vl->time;
339 if (vc->time < cache_oldest)
340 cache_oldest = vc->time;
342 pthread_mutex_unlock (&cache_lock);
343 return (0);
344 } /* int cache_update */
346 static void cache_flush (int max_age)
347 {
348 value_cache_t *this;
349 value_cache_t *prev;
350 time_t now;
352 pthread_mutex_lock (&cache_lock);
354 now = time (NULL);
356 if ((now - cache_oldest) <= max_age)
357 {
358 pthread_mutex_unlock (&cache_lock);
359 return;
360 }
362 cache_oldest = now;
364 prev = NULL;
365 this = cache_head;
367 while (this != NULL)
368 {
369 if ((now - this->time) <= max_age)
370 {
371 if (this->time < cache_oldest)
372 cache_oldest = this->time;
374 prev = this;
375 this = this->next;
376 continue;
377 }
379 if (prev == NULL)
380 cache_head = this->next;
381 else
382 prev->next = this->next;
384 free (this->gauge);
385 free (this->counter);
386 free (this);
388 if (prev == NULL)
389 this = cache_head;
390 else
391 this = prev->next;
392 } /* while (this != NULL) */
394 pthread_mutex_unlock (&cache_lock);
395 } /* int cache_flush */
397 static int us_open_socket (void)
398 {
399 struct sockaddr_un sa;
400 int status;
402 sock_fd = socket (PF_UNIX, SOCK_STREAM, 0);
403 if (sock_fd < 0)
404 {
405 char errbuf[1024];
406 ERROR ("unixsock plugin: socket failed: %s",
407 sstrerror (errno, errbuf, sizeof (errbuf)));
408 return (-1);
409 }
411 memset (&sa, '\0', sizeof (sa));
412 sa.sun_family = AF_UNIX;
413 strncpy (sa.sun_path, (sock_file != NULL) ? sock_file : US_DEFAULT_PATH,
414 sizeof (sa.sun_path) - 1);
415 /* unlink (sa.sun_path); */
417 status = bind (sock_fd, (struct sockaddr *) &sa, sizeof (sa));
418 if (status != 0)
419 {
420 char errbuf[1024];
421 sstrerror (errno, errbuf, sizeof (errbuf));
422 DEBUG ("bind failed: %s; sa.sun_path = %s", errbuf, sa.sun_path);
423 ERROR ("unixsock plugin: bind failed: %s", errbuf);
424 close (sock_fd);
425 sock_fd = -1;
426 return (-1);
427 }
429 status = listen (sock_fd, 8);
430 if (status != 0)
431 {
432 char errbuf[1024];
433 ERROR ("unixsock plugin: listen failed: %s",
434 sstrerror (errno, errbuf, sizeof (errbuf)));
435 close (sock_fd);
436 sock_fd = -1;
437 return (-1);
438 }
440 do
441 {
442 char *grpname;
443 struct group *g;
444 struct group sg;
445 char grbuf[2048];
447 grpname = (sock_group != NULL) ? sock_group : COLLECTD_GRP_NAME;
448 g = NULL;
450 status = getgrnam_r (grpname, &sg, grbuf, sizeof (grbuf), &g);
451 if (status != 0)
452 {
453 char errbuf[1024];
454 WARNING ("unixsock plugin: getgrnam_r (%s) failed: %s", grpname,
455 sstrerror (errno, errbuf, sizeof (errbuf)));
456 break;
457 }
458 if (g == NULL)
459 {
460 WARNING ("unixsock plugin: No such group: `%s'",
461 grpname);
462 break;
463 }
465 if (chown ((sock_file != NULL) ? sock_file : US_DEFAULT_PATH,
466 (uid_t) -1, g->gr_gid) != 0)
467 {
468 char errbuf[1024];
469 WARNING ("unixsock plugin: chown (%s, -1, %i) failed: %s",
470 (sock_file != NULL) ? sock_file : US_DEFAULT_PATH,
471 (int) g->gr_gid,
472 sstrerror (errno, errbuf, sizeof (errbuf)));
473 }
474 } while (0);
476 return (0);
477 } /* int us_open_socket */
479 static int us_handle_getval (FILE *fh, char **fields, int fields_num)
480 {
481 char *hostname;
482 char *plugin;
483 char *plugin_instance;
484 char *type;
485 char *type_instance;
486 char name[4*DATA_MAX_NAME_LEN];
487 value_cache_t *vc;
488 int status;
489 int i;
491 if (fields_num != 2)
492 {
493 DEBUG ("unixsock plugin: Wrong number of fields: %i", fields_num);
494 fprintf (fh, "-1 Wrong number of fields: Got %i, expected 2.\n",
495 fields_num);
496 fflush (fh);
497 return (-1);
498 }
499 DEBUG ("unixsock plugin: Got query for `%s'", fields[1]);
501 status = parse_identifier (fields[1], &hostname,
502 &plugin, &plugin_instance,
503 &type, &type_instance);
504 if (status != 0)
505 {
506 DEBUG ("unixsock plugin: Cannot parse `%s'", fields[1]);
507 fprintf (fh, "-1 Cannot parse identifier.\n");
508 fflush (fh);
509 return (-1);
510 }
512 status = cache_alloc_name (name, sizeof (name),
513 hostname, plugin, plugin_instance, type, type_instance);
514 /* FIXME: Send some response */
515 if (status != 0)
516 return (-1);
518 pthread_mutex_lock (&cache_lock);
520 DEBUG ("vc = cache_search (%s)", name);
521 vc = cache_search (name);
523 if (vc == NULL)
524 {
525 DEBUG ("Did not find cache entry.");
526 fprintf (fh, "-1 No such value");
527 }
528 else
529 {
530 DEBUG ("Found cache entry.");
531 fprintf (fh, "%i", vc->values_num);
532 for (i = 0; i < vc->values_num; i++)
533 {
534 fprintf (fh, " %s=", vc->ds->ds[i].name);
535 if (isnan (vc->gauge[i]))
536 fprintf (fh, "NaN");
537 else
538 fprintf (fh, "%12e", vc->gauge[i]);
539 }
540 }
542 /* Free the mutex as soon as possible and definitely before flushing */
543 pthread_mutex_unlock (&cache_lock);
545 fprintf (fh, "\n");
546 fflush (fh);
548 return (0);
549 } /* int us_handle_getval */
551 static int us_handle_putval (FILE *fh, char **fields, int fields_num)
552 {
553 char *hostname;
554 char *plugin;
555 char *plugin_instance;
556 char *type;
557 char *type_instance;
558 int status;
559 int i;
561 const data_set_t *ds;
562 value_list_t vl = VALUE_LIST_INIT;
564 char **value_ptr;
566 if (fields_num != 3)
567 {
568 DEBUG ("unixsock plugin: Wrong number of fields: %i", fields_num);
569 fprintf (fh, "-1 Wrong number of fields: Got %i, expected 3.\n",
570 fields_num);
571 fflush (fh);
572 return (-1);
573 }
575 status = parse_identifier (fields[1], &hostname,
576 &plugin, &plugin_instance,
577 &type, &type_instance);
578 if (status != 0)
579 {
580 DEBUG ("unixsock plugin: Cannot parse `%s'", fields[1]);
581 fprintf (fh, "-1 Cannot parse identifier.\n");
582 fflush (fh);
583 return (-1);
584 }
586 /* FIXME: Send some response */
587 if ((strlen (hostname) > sizeof (vl.host))
588 || (strlen (plugin) > sizeof (vl.plugin))
589 || ((plugin_instance != NULL)
590 && (strlen (plugin_instance) > sizeof (vl.plugin_instance)))
591 || ((type_instance != NULL)
592 && (strlen (type_instance) > sizeof (vl.type_instance))))
593 return (-1);
595 strcpy (vl.host, hostname);
596 strcpy (vl.plugin, plugin);
597 if (plugin_instance != NULL)
598 strcpy (vl.plugin_instance, plugin_instance);
599 if (type_instance != NULL)
600 strcpy (vl.type_instance, type_instance);
602 { /* parse the time */
603 char *t = fields[2];
604 char *v = strchr (t, ':');
605 if (v == NULL)
606 return (-1);
607 *v = '\0'; v++;
609 vl.time = (time_t) atoi (t);
610 if (vl.time == 0)
611 vl.time = time (NULL);
613 fields[2] = v;
614 }
616 ds = plugin_get_ds (type);
617 if (ds == NULL)
618 return (-1);
620 value_ptr = (char **) calloc (ds->ds_num, sizeof (char *));
621 /* FIXME: Send some response */
622 if (value_ptr == NULL)
623 return (-1);
626 { /* parse the value-list. It's colon-separated. */
627 char *dummy;
628 char *ptr;
629 char *saveptr;
631 i = 0;
632 dummy = fields[2];
633 saveptr = NULL;
634 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
635 {
636 dummy = NULL;
637 if (i >= ds->ds_num)
638 {
639 i = ds->ds_num + 1;
640 break;
641 }
642 value_ptr[i] = ptr;
643 i++;
644 }
646 if (i != ds->ds_num)
647 {
648 sfree (value_ptr);
649 /* FIXME: Send some response */
650 return (-1);
651 }
652 } /* done parsing the value-list */
654 vl.values_len = ds->ds_num;
655 vl.values = (value_t *) malloc (vl.values_len * sizeof (value_t));
656 if (vl.values == NULL)
657 {
658 sfree (value_ptr);
659 return (-1);
660 }
661 DEBUG ("value_ptr = 0x%p; vl.values = 0x%p;", (void *) value_ptr, (void *) vl.values);
663 for (i = 0; i < ds->ds_num; i++)
664 {
665 if (strcmp (value_ptr[i], "U") == 0)
666 vl.values[i].gauge = NAN;
667 else if (ds->ds[i].type == DS_TYPE_COUNTER)
668 vl.values[i].counter = atoll (value_ptr[i]);
669 else if (ds->ds[i].type == DS_TYPE_GAUGE)
670 vl.values[i].gauge = atof (value_ptr[i]);
671 } /* for (i = 2 .. fields_num) */
673 plugin_dispatch_values (type, &vl);
675 DEBUG ("value_ptr = 0x%p; vl.values = 0x%p;", (void *) value_ptr, (void *) vl.values);
677 sfree (value_ptr);
678 sfree (vl.values);
680 fprintf (fh, "0 Success\n");
681 fflush (fh);
683 return (0);
684 } /* int us_handle_putval */
686 static void *us_handle_client (void *arg)
687 {
688 int fd;
689 FILE *fh;
690 char buffer[1024];
691 char *fields[128];
692 int fields_num;
694 fd = *((int *) arg);
695 free (arg);
696 arg = NULL;
698 DEBUG ("Reading from fd #%i", fd);
700 fh = fdopen (fd, "r+");
701 if (fh == NULL)
702 {
703 char errbuf[1024];
704 ERROR ("unixsock plugin: fdopen failed: %s",
705 sstrerror (errno, errbuf, sizeof (errbuf)));
706 close (fd);
707 pthread_exit ((void *) 1);
708 }
710 while (fgets (buffer, sizeof (buffer), fh) != NULL)
711 {
712 int len;
714 len = strlen (buffer);
715 while ((len > 0)
716 && ((buffer[len - 1] == '\n') || (buffer[len - 1] == '\r')))
717 buffer[--len] = '\0';
719 if (len == 0)
720 continue;
722 DEBUG ("fgets -> buffer = %s; len = %i;", buffer, len);
724 fields_num = strsplit (buffer, fields,
725 sizeof (fields) / sizeof (fields[0]));
727 if (fields_num < 1)
728 {
729 close (fd);
730 break;
731 }
733 if (strcasecmp (fields[0], "getval") == 0)
734 {
735 us_handle_getval (fh, fields, fields_num);
736 }
737 else if (strcasecmp (fields[0], "putval") == 0)
738 {
739 us_handle_putval (fh, fields, fields_num);
740 }
741 else
742 {
743 fprintf (fh, "Unknown command: %s\n", fields[0]);
744 fflush (fh);
745 }
746 } /* while (fgets) */
748 DEBUG ("Exiting..");
749 close (fd);
751 pthread_exit ((void *) 0);
752 } /* void *us_handle_client */
754 static void *us_server_thread (void *arg)
755 {
756 int status;
757 int *remote_fd;
758 pthread_t th;
759 pthread_attr_t th_attr;
761 if (us_open_socket () != 0)
762 pthread_exit ((void *) 1);
764 while (loop != 0)
765 {
766 DEBUG ("Calling accept..");
767 status = accept (sock_fd, NULL, NULL);
768 if (status < 0)
769 {
770 char errbuf[1024];
772 if (errno == EINTR)
773 continue;
775 ERROR ("unixsock plugin: accept failed: %s",
776 sstrerror (errno, errbuf, sizeof (errbuf)));
777 close (sock_fd);
778 sock_fd = -1;
779 pthread_exit ((void *) 1);
780 }
782 remote_fd = (int *) malloc (sizeof (int));
783 if (remote_fd == NULL)
784 {
785 char errbuf[1024];
786 WARNING ("unixsock plugin: malloc failed: %s",
787 sstrerror (errno, errbuf, sizeof (errbuf)));
788 close (status);
789 continue;
790 }
791 *remote_fd = status;
793 DEBUG ("Spawning child to handle connection on fd #%i", *remote_fd);
795 pthread_attr_init (&th_attr);
796 pthread_attr_setdetachstate (&th_attr, PTHREAD_CREATE_DETACHED);
798 status = pthread_create (&th, &th_attr, us_handle_client, (void *) remote_fd);
799 if (status != 0)
800 {
801 char errbuf[1024];
802 WARNING ("unixsock plugin: pthread_create failed: %s",
803 sstrerror (errno, errbuf, sizeof (errbuf)));
804 close (*remote_fd);
805 free (remote_fd);
806 continue;
807 }
808 } /* while (loop) */
810 close (sock_fd);
811 sock_fd = -1;
813 return ((void *) 0);
814 } /* void *us_server_thread */
816 static int us_config (const char *key, const char *val)
817 {
818 if (strcasecmp (key, "SocketFile") == 0)
819 {
820 sfree (sock_file);
821 sock_file = strdup (val);
822 }
823 else if (strcasecmp (key, "SocketGroup") == 0)
824 {
825 sfree (sock_group);
826 sock_group = strdup (val);
827 }
828 else if (strcasecmp (key, "SocketPerms") == 0)
829 {
830 sock_perms = (int) strtol (val, NULL, 8);
831 }
832 else
833 {
834 return (-1);
835 }
837 return (0);
838 } /* int us_config */
840 static int us_init (void)
841 {
842 int status;
844 loop = 1;
846 status = pthread_create (&listen_thread, NULL, us_server_thread, NULL);
847 if (status != 0)
848 {
849 char errbuf[1024];
850 ERROR ("unixsock plugin: pthread_create failed: %s",
851 sstrerror (errno, errbuf, sizeof (errbuf)));
852 return (-1);
853 }
855 return (0);
856 } /* int us_init */
858 static int us_shutdown (void)
859 {
860 void *ret;
862 loop = 0;
864 if (listen_thread != (pthread_t) 0)
865 {
866 DEBUG ("unixsock plugin: Sending SIGTERM to listening thread");
867 pthread_kill (listen_thread, SIGTERM);
868 DEBUG ("unixsock plugin: Waiting for thread to terminate");
869 pthread_join (listen_thread, &ret);
870 listen_thread = (pthread_t) 0;
871 }
873 plugin_unregister_init ("unixsock");
874 plugin_unregister_write ("unixsock");
875 plugin_unregister_shutdown ("unixsock");
877 return (0);
878 } /* int us_shutdown */
880 static int us_write (const data_set_t *ds, const value_list_t *vl)
881 {
882 cache_update (ds, vl);
883 cache_flush (2 * atoi (COLLECTD_STEP));
885 return (0);
886 }
888 void module_register (void)
889 {
890 plugin_register_config ("unixsock", us_config,
891 config_keys, config_keys_num);
892 plugin_register_init ("unixsock", us_init);
893 plugin_register_write ("unixsock", us_write);
894 plugin_register_shutdown ("unixsock", us_shutdown);
895 } /* void module_register (void) */
897 /* vim: set sw=4 ts=4 sts=4 tw=78 : */