1 /**
2 * collectd - src/perl.c
3 * Copyright (C) 2007, 2008 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; 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 * Sebastian Harl <sh at tokkee.org>
20 **/
22 /*
23 * This plugin embeds a Perl interpreter into collectd and provides an
24 * interface for collectd plugins written in perl.
25 */
27 /* do not automatically get the thread specific perl interpreter */
28 #define PERL_NO_GET_CONTEXT
30 #define DONT_POISON_SPRINTF_YET 1
31 #include "collectd.h"
32 #undef DONT_POISON_SPRINTF_YET
34 #include "configfile.h"
36 #include <EXTERN.h>
37 #include <perl.h>
39 #if defined(COLLECT_DEBUG) && COLLECT_DEBUG && defined(__GNUC__) && __GNUC__
40 # pragma GCC poison sprintf
41 #endif
43 #include <XSUB.h>
45 /* Some versions of Perl define their own version of DEBUG... :-/ */
46 #ifdef DEBUG
47 # undef DEBUG
48 #endif /* DEBUG */
50 /* ... while we want the definition found in plugin.h. */
51 #include "plugin.h"
52 #include "common.h"
54 #include <pthread.h>
56 #if !defined(USE_ITHREADS)
57 # error "Perl does not support ithreads!"
58 #endif /* !defined(USE_ITHREADS) */
60 /* clear the Perl sub's stack frame
61 * (this should only be used inside an XSUB) */
62 #define CLEAR_STACK_FRAME PL_stack_sp = PL_stack_base + *PL_markstack_ptr
64 #define PLUGIN_INIT 0
65 #define PLUGIN_READ 1
66 #define PLUGIN_WRITE 2
67 #define PLUGIN_SHUTDOWN 3
68 #define PLUGIN_LOG 4
69 #define PLUGIN_NOTIF 5
70 #define PLUGIN_FLUSH 6
72 #define PLUGIN_TYPES 7
74 #define PLUGIN_CONFIG 254
75 #define PLUGIN_DATASET 255
77 #define log_debug(...) DEBUG ("perl: " __VA_ARGS__)
78 #define log_info(...) INFO ("perl: " __VA_ARGS__)
79 #define log_warn(...) WARNING ("perl: " __VA_ARGS__)
80 #define log_err(...) ERROR ("perl: " __VA_ARGS__)
82 /* this is defined in DynaLoader.a */
83 void boot_DynaLoader (PerlInterpreter *, CV *);
85 static XS (Collectd_plugin_register_ds);
86 static XS (Collectd_plugin_unregister_ds);
87 static XS (Collectd_plugin_dispatch_values);
88 static XS (Collectd__plugin_flush);
89 static XS (Collectd_plugin_dispatch_notification);
90 static XS (Collectd_plugin_log);
91 static XS (Collectd_call_by_name);
93 /*
94 * private data types
95 */
97 typedef struct c_ithread_s {
98 /* the thread's Perl interpreter */
99 PerlInterpreter *interp;
101 /* double linked list of threads */
102 struct c_ithread_s *prev;
103 struct c_ithread_s *next;
104 } c_ithread_t;
106 typedef struct {
107 c_ithread_t *head;
108 c_ithread_t *tail;
110 #if COLLECT_DEBUG
111 /* some usage stats */
112 int number_of_threads;
113 #endif /* COLLECT_DEBUG */
115 pthread_mutex_t mutex;
116 } c_ithread_list_t;
118 /*
119 * private variables
120 */
122 /* if perl_threads != NULL perl_threads->head must
123 * point to the "base" thread */
124 static c_ithread_list_t *perl_threads = NULL;
126 /* the key used to store each pthread's ithread */
127 static pthread_key_t perl_thr_key;
129 static int perl_argc = 0;
130 static char **perl_argv = NULL;
132 static char base_name[DATA_MAX_NAME_LEN] = "";
134 static struct {
135 char name[64];
136 XS ((*f));
137 } api[] =
138 {
139 { "Collectd::plugin_register_data_set", Collectd_plugin_register_ds },
140 { "Collectd::plugin_unregister_data_set", Collectd_plugin_unregister_ds },
141 { "Collectd::plugin_dispatch_values", Collectd_plugin_dispatch_values },
142 { "Collectd::_plugin_flush", Collectd__plugin_flush },
143 { "Collectd::plugin_dispatch_notification",
144 Collectd_plugin_dispatch_notification },
145 { "Collectd::plugin_log", Collectd_plugin_log },
146 { "Collectd::call_by_name", Collectd_call_by_name },
147 { "", NULL }
148 };
150 struct {
151 char name[64];
152 int value;
153 } constants[] =
154 {
155 { "Collectd::TYPE_INIT", PLUGIN_INIT },
156 { "Collectd::TYPE_READ", PLUGIN_READ },
157 { "Collectd::TYPE_WRITE", PLUGIN_WRITE },
158 { "Collectd::TYPE_SHUTDOWN", PLUGIN_SHUTDOWN },
159 { "Collectd::TYPE_LOG", PLUGIN_LOG },
160 { "Collectd::TYPE_NOTIF", PLUGIN_NOTIF },
161 { "Collectd::TYPE_FLUSH", PLUGIN_FLUSH },
162 { "Collectd::TYPE_CONFIG", PLUGIN_CONFIG },
163 { "Collectd::TYPE_DATASET", PLUGIN_DATASET },
164 { "Collectd::DS_TYPE_COUNTER", DS_TYPE_COUNTER },
165 { "Collectd::DS_TYPE_GAUGE", DS_TYPE_GAUGE },
166 { "Collectd::LOG_ERR", LOG_ERR },
167 { "Collectd::LOG_WARNING", LOG_WARNING },
168 { "Collectd::LOG_NOTICE", LOG_NOTICE },
169 { "Collectd::LOG_INFO", LOG_INFO },
170 { "Collectd::LOG_DEBUG", LOG_DEBUG },
171 { "Collectd::NOTIF_FAILURE", NOTIF_FAILURE },
172 { "Collectd::NOTIF_WARNING", NOTIF_WARNING },
173 { "Collectd::NOTIF_OKAY", NOTIF_OKAY },
174 { "", 0 }
175 };
177 struct {
178 char name[64];
179 char *var;
180 } g_strings[] =
181 {
182 { "Collectd::hostname_g", hostname_g },
183 { "", NULL }
184 };
186 struct {
187 char name[64];
188 int *var;
189 } g_integers[] =
190 {
191 { "Collectd::interval_g", &interval_g },
192 { "", NULL }
193 };
195 /*
196 * Helper functions for data type conversion.
197 */
199 /*
200 * data source:
201 * [
202 * {
203 * name => $ds_name,
204 * type => $ds_type,
205 * min => $ds_min,
206 * max => $ds_max
207 * },
208 * ...
209 * ]
210 */
211 static int hv2data_source (pTHX_ HV *hash, data_source_t *ds)
212 {
213 SV **tmp = NULL;
215 if ((NULL == hash) || (NULL == ds))
216 return -1;
218 if (NULL != (tmp = hv_fetch (hash, "name", 4, 0))) {
219 sstrncpy (ds->name, SvPV_nolen (*tmp), sizeof (ds->name));
220 }
221 else {
222 log_err ("hv2data_source: No DS name given.");
223 return -1;
224 }
226 if (NULL != (tmp = hv_fetch (hash, "type", 4, 0))) {
227 ds->type = SvIV (*tmp);
229 if ((DS_TYPE_COUNTER != ds->type) && (DS_TYPE_GAUGE != ds->type)) {
230 log_err ("hv2data_source: Invalid DS type.");
231 return -1;
232 }
233 }
234 else {
235 ds->type = DS_TYPE_COUNTER;
236 }
238 if (NULL != (tmp = hv_fetch (hash, "min", 3, 0)))
239 ds->min = SvNV (*tmp);
240 else
241 ds->min = NAN;
243 if (NULL != (tmp = hv_fetch (hash, "max", 3, 0)))
244 ds->max = SvNV (*tmp);
245 else
246 ds->max = NAN;
247 return 0;
248 } /* static int hv2data_source (HV *, data_source_t *) */
250 static int av2value (pTHX_ char *name, AV *array, value_t *value, int len)
251 {
252 const data_set_t *ds;
254 int i = 0;
256 if ((NULL == name) || (NULL == array) || (NULL == value))
257 return -1;
259 if (av_len (array) < len - 1)
260 len = av_len (array) + 1;
262 if (0 >= len)
263 return -1;
265 ds = plugin_get_ds (name);
266 if (NULL == ds) {
267 log_err ("av2value: Unknown dataset \"%s\"", name);
268 return -1;
269 }
271 if (ds->ds_num < len) {
272 log_warn ("av2value: Value length exceeds data set length.");
273 len = ds->ds_num;
274 }
276 for (i = 0; i < len; ++i) {
277 SV **tmp = av_fetch (array, i, 0);
279 if (NULL != tmp) {
280 if (DS_TYPE_COUNTER == ds->ds[i].type)
281 value[i].counter = SvIV (*tmp);
282 else
283 value[i].gauge = SvNV (*tmp);
284 }
285 else {
286 return -1;
287 }
288 }
289 return len;
290 } /* static int av2value (char *, AV *, value_t *, int) */
292 /*
293 * value list:
294 * {
295 * values => [ @values ],
296 * time => $time,
297 * host => $host,
298 * plugin => $plugin,
299 * plugin_instance => $pinstance,
300 * type_instance => $tinstance,
301 * }
302 */
303 static int hv2value_list (pTHX_ HV *hash, value_list_t *vl)
304 {
305 SV **tmp;
307 if ((NULL == hash) || (NULL == vl))
308 return -1;
310 if (NULL == (tmp = hv_fetch (hash, "type", 4, 0))) {
311 log_err ("hv2value_list: No type given.");
312 return -1;
313 }
315 sstrncpy (vl->type, SvPV_nolen (*tmp), sizeof (vl->type));
317 if ((NULL == (tmp = hv_fetch (hash, "values", 6, 0)))
318 || (! (SvROK (*tmp) && (SVt_PVAV == SvTYPE (SvRV (*tmp)))))) {
319 log_err ("hv2value_list: No valid values given.");
320 return -1;
321 }
323 {
324 AV *array = (AV *)SvRV (*tmp);
325 int len = av_len (array) + 1;
327 if (len <= 0)
328 return -1;
330 vl->values = (value_t *)smalloc (len * sizeof (value_t));
331 vl->values_len = av2value (aTHX_ vl->type, (AV *)SvRV (*tmp),
332 vl->values, len);
334 if (-1 == vl->values_len) {
335 sfree (vl->values);
336 return -1;
337 }
338 }
340 if (NULL != (tmp = hv_fetch (hash, "time", 4, 0))) {
341 vl->time = (time_t)SvIV (*tmp);
342 }
344 if (NULL != (tmp = hv_fetch (hash, "host", 4, 0))) {
345 sstrncpy (vl->host, SvPV_nolen (*tmp), sizeof (vl->host));
346 }
347 else {
348 sstrncpy (vl->host, hostname_g, sizeof (vl->host));
349 }
351 if (NULL != (tmp = hv_fetch (hash, "plugin", 6, 0)))
352 sstrncpy (vl->plugin, SvPV_nolen (*tmp), sizeof (vl->plugin));
354 if (NULL != (tmp = hv_fetch (hash, "plugin_instance", 15, 0)))
355 sstrncpy (vl->plugin_instance, SvPV_nolen (*tmp),
356 sizeof (vl->plugin_instance));
358 if (NULL != (tmp = hv_fetch (hash, "type_instance", 13, 0)))
359 sstrncpy (vl->type_instance, SvPV_nolen (*tmp),
360 sizeof (vl->type_instance));
361 return 0;
362 } /* static int hv2value_list (pTHX_ HV *, value_list_t *) */
364 static int av2data_set (pTHX_ AV *array, char *name, data_set_t *ds)
365 {
366 int len, i;
368 if ((NULL == array) || (NULL == name) || (NULL == ds))
369 return -1;
371 len = av_len (array);
373 if (-1 == len) {
374 log_err ("av2data_set: Invalid data set.");
375 return -1;
376 }
378 ds->ds = (data_source_t *)smalloc ((len + 1) * sizeof (data_source_t));
379 ds->ds_num = len + 1;
381 for (i = 0; i <= len; ++i) {
382 SV **elem = av_fetch (array, i, 0);
384 if (NULL == elem) {
385 log_err ("av2data_set: Failed to fetch data source %i.", i);
386 return -1;
387 }
389 if (! (SvROK (*elem) && (SVt_PVHV == SvTYPE (SvRV (*elem))))) {
390 log_err ("av2data_set: Invalid data source.");
391 return -1;
392 }
394 if (-1 == hv2data_source (aTHX_ (HV *)SvRV (*elem), &ds->ds[i]))
395 return -1;
397 log_debug ("av2data_set: "
398 "DS.name = \"%s\", DS.type = %i, DS.min = %f, DS.max = %f",
399 ds->ds[i].name, ds->ds[i].type, ds->ds[i].min, ds->ds[i].max);
400 }
402 sstrncpy (ds->type, name, sizeof (ds->type));
403 return 0;
404 } /* static int av2data_set (pTHX_ AV *, data_set_t *) */
406 /*
407 * notification:
408 * {
409 * severity => $severity,
410 * time => $time,
411 * message => $msg,
412 * host => $host,
413 * plugin => $plugin,
414 * type => $type,
415 * plugin_instance => $instance,
416 * type_instance => $type_instance
417 * }
418 */
419 static int hv2notification (pTHX_ HV *hash, notification_t *n)
420 {
421 SV **tmp = NULL;
423 if ((NULL == hash) || (NULL == n))
424 return -1;
426 if (NULL != (tmp = hv_fetch (hash, "severity", 8, 0)))
427 n->severity = SvIV (*tmp);
428 else
429 n->severity = NOTIF_FAILURE;
431 if (NULL != (tmp = hv_fetch (hash, "time", 4, 0)))
432 n->time = (time_t)SvIV (*tmp);
433 else
434 n->time = time (NULL);
436 if (NULL != (tmp = hv_fetch (hash, "message", 7, 0)))
437 sstrncpy (n->message, SvPV_nolen (*tmp), sizeof (n->message));
439 if (NULL != (tmp = hv_fetch (hash, "host", 4, 0)))
440 sstrncpy (n->host, SvPV_nolen (*tmp), sizeof (n->host));
441 else
442 sstrncpy (n->host, hostname_g, sizeof (n->host));
444 if (NULL != (tmp = hv_fetch (hash, "plugin", 6, 0)))
445 sstrncpy (n->plugin, SvPV_nolen (*tmp), sizeof (n->plugin));
447 if (NULL != (tmp = hv_fetch (hash, "plugin_instance", 15, 0)))
448 sstrncpy (n->plugin_instance, SvPV_nolen (*tmp),
449 sizeof (n->plugin_instance));
451 if (NULL != (tmp = hv_fetch (hash, "type", 4, 0)))
452 sstrncpy (n->type, SvPV_nolen (*tmp), sizeof (n->type));
454 if (NULL != (tmp = hv_fetch (hash, "type_instance", 13, 0)))
455 sstrncpy (n->type_instance, SvPV_nolen (*tmp),
456 sizeof (n->type_instance));
457 return 0;
458 } /* static int hv2notification (pTHX_ HV *, notification_t *) */
460 static int data_set2av (pTHX_ data_set_t *ds, AV *array)
461 {
462 int i = 0;
464 if ((NULL == ds) || (NULL == array))
465 return -1;
467 av_extend (array, ds->ds_num);
469 for (i = 0; i < ds->ds_num; ++i) {
470 HV *source = newHV ();
472 if (NULL == hv_store (source, "name", 4,
473 newSVpv (ds->ds[i].name, 0), 0))
474 return -1;
476 if (NULL == hv_store (source, "type", 4, newSViv (ds->ds[i].type), 0))
477 return -1;
479 if (! isnan (ds->ds[i].min))
480 if (NULL == hv_store (source, "min", 3,
481 newSVnv (ds->ds[i].min), 0))
482 return -1;
484 if (! isnan (ds->ds[i].max))
485 if (NULL == hv_store (source, "max", 3,
486 newSVnv (ds->ds[i].max), 0))
487 return -1;
489 if (NULL == av_store (array, i, newRV_noinc ((SV *)source)))
490 return -1;
491 }
492 return 0;
493 } /* static int data_set2av (data_set_t *, AV *) */
495 static int value_list2hv (pTHX_ value_list_t *vl, data_set_t *ds, HV *hash)
496 {
497 AV *values = NULL;
499 int i = 0;
500 int len = 0;
502 if ((NULL == vl) || (NULL == ds) || (NULL == hash))
503 return -1;
505 len = vl->values_len;
507 if (ds->ds_num < len) {
508 log_warn ("value2av: Value length exceeds data set length.");
509 len = ds->ds_num;
510 }
512 values = newAV ();
513 av_extend (values, len - 1);
515 for (i = 0; i < len; ++i) {
516 SV *val = NULL;
518 if (DS_TYPE_COUNTER == ds->ds[i].type)
519 val = newSViv (vl->values[i].counter);
520 else
521 val = newSVnv (vl->values[i].gauge);
523 if (NULL == av_store (values, i, val)) {
524 av_undef (values);
525 return -1;
526 }
527 }
529 if (NULL == hv_store (hash, "values", 6, newRV_noinc ((SV *)values), 0))
530 return -1;
532 if (0 != vl->time)
533 if (NULL == hv_store (hash, "time", 4, newSViv (vl->time), 0))
534 return -1;
536 if ('\0' != vl->host[0])
537 if (NULL == hv_store (hash, "host", 4, newSVpv (vl->host, 0), 0))
538 return -1;
540 if ('\0' != vl->plugin[0])
541 if (NULL == hv_store (hash, "plugin", 6, newSVpv (vl->plugin, 0), 0))
542 return -1;
544 if ('\0' != vl->plugin_instance[0])
545 if (NULL == hv_store (hash, "plugin_instance", 15,
546 newSVpv (vl->plugin_instance, 0), 0))
547 return -1;
549 if ('\0' != vl->type[0])
550 if (NULL == hv_store (hash, "type", 4, newSVpv (vl->type, 0), 0))
551 return -1;
553 if ('\0' != vl->type_instance[0])
554 if (NULL == hv_store (hash, "type_instance", 13,
555 newSVpv (vl->type_instance, 0), 0))
556 return -1;
557 return 0;
558 } /* static int value2av (value_list_t *, data_set_t *, HV *) */
560 static int notification2hv (pTHX_ notification_t *n, HV *hash)
561 {
562 if (NULL == hv_store (hash, "severity", 8, newSViv (n->severity), 0))
563 return -1;
565 if (0 != n->time)
566 if (NULL == hv_store (hash, "time", 4, newSViv (n->time), 0))
567 return -1;
569 if ('\0' != *n->message)
570 if (NULL == hv_store (hash, "message", 7, newSVpv (n->message, 0), 0))
571 return -1;
573 if ('\0' != *n->host)
574 if (NULL == hv_store (hash, "host", 4, newSVpv (n->host, 0), 0))
575 return -1;
577 if ('\0' != *n->plugin)
578 if (NULL == hv_store (hash, "plugin", 6, newSVpv (n->plugin, 0), 0))
579 return -1;
581 if ('\0' != *n->plugin_instance)
582 if (NULL == hv_store (hash, "plugin_instance", 15,
583 newSVpv (n->plugin_instance, 0), 0))
584 return -1;
586 if ('\0' != *n->type)
587 if (NULL == hv_store (hash, "type", 4, newSVpv (n->type, 0), 0))
588 return -1;
590 if ('\0' != *n->type_instance)
591 if (NULL == hv_store (hash, "type_instance", 13,
592 newSVpv (n->type_instance, 0), 0))
593 return -1;
594 return 0;
595 } /* static int notification2hv (notification_t *, HV *) */
597 static int oconfig_item2hv (pTHX_ oconfig_item_t *ci, HV *hash)
598 {
599 int i;
601 AV *values;
602 AV *children;
604 if (NULL == hv_store (hash, "key", 3, newSVpv (ci->key, 0), 0))
605 return -1;
607 values = newAV ();
608 if (0 < ci->values_num)
609 av_extend (values, ci->values_num);
611 if (NULL == hv_store (hash, "values", 6, newRV_noinc ((SV *)values), 0)) {
612 av_clear (values);
613 av_undef (values);
614 return -1;
615 }
617 for (i = 0; i < ci->values_num; ++i) {
618 SV *value;
620 switch (ci->values[i].type) {
621 case OCONFIG_TYPE_STRING:
622 value = newSVpv (ci->values[i].value.string, 0);
623 break;
624 case OCONFIG_TYPE_NUMBER:
625 value = newSVnv ((NV)ci->values[i].value.number);
626 break;
627 case OCONFIG_TYPE_BOOLEAN:
628 value = ci->values[i].value.boolean ? &PL_sv_yes : &PL_sv_no;
629 break;
630 default:
631 log_err ("oconfig_item2hv: Invalid value type %i.",
632 ci->values[i].type);
633 value = &PL_sv_undef;
634 }
636 if (NULL == av_store (values, i, value)) {
637 sv_free (value);
638 return -1;
639 }
640 }
642 /* ignoring 'parent' member which is uninteresting in this case */
644 children = newAV ();
645 if (0 < ci->children_num)
646 av_extend (children, ci->children_num);
648 if (NULL == hv_store (hash, "children", 8, newRV_noinc ((SV *)children), 0)) {
649 av_clear (children);
650 av_undef (children);
651 return -1;
652 }
654 for (i = 0; i < ci->children_num; ++i) {
655 HV *child = newHV ();
657 if (0 != oconfig_item2hv (aTHX_ ci->children + i, child)) {
658 hv_clear (child);
659 hv_undef (child);
660 return -1;
661 }
663 if (NULL == av_store (children, i, newRV_noinc ((SV *)child))) {
664 hv_clear (child);
665 hv_undef (child);
666 return -1;
667 }
668 }
669 return 0;
670 } /* static int oconfig_item2hv (pTHX_ oconfig_item_t *, HV *) */
672 /*
673 * Internal functions.
674 */
676 static char *get_module_name (char *buf, size_t buf_len, const char *module) {
677 int status = 0;
678 if (base_name[0] == '\0')
679 status = ssnprintf (buf, buf_len, "%s", module);
680 else
681 status = ssnprintf (buf, buf_len, "%s::%s", base_name, module);
682 if ((status < 0) || ((unsigned int)status >= buf_len))
683 return (NULL);
684 return (buf);
685 } /* char *get_module_name */
687 /*
688 * Add a plugin's data set definition.
689 */
690 static int pplugin_register_data_set (pTHX_ char *name, AV *dataset)
691 {
692 int ret = 0;
694 data_set_t ds;
696 if ((NULL == name) || (NULL == dataset))
697 return -1;
699 if (0 != av2data_set (aTHX_ dataset, name, &ds))
700 return -1;
702 ret = plugin_register_data_set (&ds);
704 free (ds.ds);
705 return ret;
706 } /* static int pplugin_register_data_set (char *, SV *) */
708 /*
709 * Remove a plugin's data set definition.
710 */
711 static int pplugin_unregister_data_set (char *name)
712 {
713 if (NULL == name)
714 return 0;
715 return plugin_unregister_data_set (name);
716 } /* static int pplugin_unregister_data_set (char *) */
718 /*
719 * Submit the values to the write functions.
720 */
721 static int pplugin_dispatch_values (pTHX_ HV *values)
722 {
723 value_list_t vl = VALUE_LIST_INIT;
725 int ret = 0;
727 if (NULL == values)
728 return -1;
730 if (0 != hv2value_list (aTHX_ values, &vl))
731 return -1;
733 ret = plugin_dispatch_values (&vl);
735 sfree (vl.values);
736 return ret;
737 } /* static int pplugin_dispatch_values (char *, HV *) */
739 /*
740 * Dispatch a notification.
741 */
742 static int pplugin_dispatch_notification (pTHX_ HV *notif)
743 {
744 notification_t n;
746 if (NULL == notif)
747 return -1;
749 memset (&n, 0, sizeof (n));
751 if (0 != hv2notification (aTHX_ notif, &n))
752 return -1;
754 return plugin_dispatch_notification (&n);
755 } /* static int pplugin_dispatch_notification (HV *) */
757 /*
758 * Call all working functions of the given type.
759 */
760 static int pplugin_call_all (pTHX_ int type, ...)
761 {
762 int retvals = 0;
764 va_list ap;
765 int ret = 0;
767 dSP;
769 if ((type < 0) || (type >= PLUGIN_TYPES))
770 return -1;
772 va_start (ap, type);
774 ENTER;
775 SAVETMPS;
777 PUSHMARK (SP);
779 XPUSHs (sv_2mortal (newSViv ((IV)type)));
781 if (PLUGIN_WRITE == type) {
782 /*
783 * $_[0] = $plugin_type;
784 *
785 * $_[1] =
786 * [
787 * {
788 * name => $ds_name,
789 * type => $ds_type,
790 * min => $ds_min,
791 * max => $ds_max
792 * },
793 * ...
794 * ];
795 *
796 * $_[2] =
797 * {
798 * values => [ $v1, ... ],
799 * time => $time,
800 * host => $hostname,
801 * plugin => $plugin,
802 * type => $type,
803 * plugin_instance => $instance,
804 * type_instance => $type_instance
805 * };
806 */
807 data_set_t *ds;
808 value_list_t *vl;
810 AV *pds = newAV ();
811 HV *pvl = newHV ();
813 ds = va_arg (ap, data_set_t *);
814 vl = va_arg (ap, value_list_t *);
816 if (-1 == data_set2av (aTHX_ ds, pds)) {
817 av_clear (pds);
818 av_undef (pds);
819 pds = Nullav;
820 ret = -1;
821 }
823 if (-1 == value_list2hv (aTHX_ vl, ds, pvl)) {
824 hv_clear (pvl);
825 hv_undef (pvl);
826 pvl = Nullhv;
827 ret = -1;
828 }
830 XPUSHs (sv_2mortal (newSVpv (ds->type, 0)));
831 XPUSHs (sv_2mortal (newRV_noinc ((SV *)pds)));
832 XPUSHs (sv_2mortal (newRV_noinc ((SV *)pvl)));
833 }
834 else if (PLUGIN_LOG == type) {
835 /*
836 * $_[0] = $level;
837 *
838 * $_[1] = $message;
839 */
840 XPUSHs (sv_2mortal (newSViv (va_arg (ap, int))));
841 XPUSHs (sv_2mortal (newSVpv (va_arg (ap, char *), 0)));
842 }
843 else if (PLUGIN_NOTIF == type) {
844 /*
845 * $_[0] =
846 * {
847 * severity => $severity,
848 * time => $time,
849 * message => $msg,
850 * host => $host,
851 * plugin => $plugin,
852 * type => $type,
853 * plugin_instance => $instance,
854 * type_instance => $type_instance
855 * };
856 */
857 notification_t *n;
858 HV *notif = newHV ();
860 n = va_arg (ap, notification_t *);
862 if (-1 == notification2hv (aTHX_ n, notif)) {
863 hv_clear (notif);
864 hv_undef (notif);
865 notif = Nullhv;
866 ret = -1;
867 }
869 XPUSHs (sv_2mortal (newRV_noinc ((SV *)notif)));
870 }
871 else if (PLUGIN_FLUSH == type) {
872 /*
873 * $_[0] = $timeout;
874 * $_[1] = $identifier;
875 */
876 XPUSHs (sv_2mortal (newSViv (va_arg (ap, int))));
877 XPUSHs (sv_2mortal (newSVpv (va_arg (ap, char *), 0)));
878 }
880 PUTBACK;
882 retvals = call_pv ("Collectd::plugin_call_all", G_SCALAR);
884 SPAGAIN;
885 if (0 < retvals) {
886 SV *tmp = POPs;
887 if (! SvTRUE (tmp))
888 ret = -1;
889 }
891 PUTBACK;
892 FREETMPS;
893 LEAVE;
895 va_end (ap);
896 return ret;
897 } /* static int pplugin_call_all (int, ...) */
899 /*
900 * Exported Perl API.
901 */
903 /*
904 * Collectd::plugin_register_data_set (type, dataset).
905 *
906 * type:
907 * type of the dataset
908 *
909 * dataset:
910 * dataset to be registered
911 */
912 static XS (Collectd_plugin_register_ds)
913 {
914 SV *data = NULL;
915 int ret = 0;
917 dXSARGS;
919 if (2 != items) {
920 log_err ("Usage: Collectd::plugin_register_data_set(type, dataset)");
921 XSRETURN_EMPTY;
922 }
924 log_debug ("Collectd::plugin_register_data_set: "
925 "type = \"%s\", dataset = \"%s\"",
926 SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
928 data = ST (1);
930 if (SvROK (data) && (SVt_PVAV == SvTYPE (SvRV (data)))) {
931 ret = pplugin_register_data_set (aTHX_ SvPV_nolen (ST (0)),
932 (AV *)SvRV (data));
933 }
934 else {
935 log_err ("Collectd::plugin_register_data_set: Invalid data.");
936 XSRETURN_EMPTY;
937 }
939 if (0 == ret)
940 XSRETURN_YES;
941 else
942 XSRETURN_EMPTY;
943 } /* static XS (Collectd_plugin_register_ds) */
945 /*
946 * Collectd::plugin_unregister_data_set (type).
947 *
948 * type:
949 * type of the dataset
950 */
951 static XS (Collectd_plugin_unregister_ds)
952 {
953 dXSARGS;
955 if (1 != items) {
956 log_err ("Usage: Collectd::plugin_unregister_data_set(type)");
957 XSRETURN_EMPTY;
958 }
960 log_debug ("Collectd::plugin_unregister_data_set: type = \"%s\"",
961 SvPV_nolen (ST (0)));
963 if (0 == pplugin_unregister_data_set (SvPV_nolen (ST (0))))
964 XSRETURN_YES;
965 else
966 XSRETURN_EMPTY;
967 } /* static XS (Collectd_plugin_register_ds) */
969 /*
970 * Collectd::plugin_dispatch_values (name, values).
971 *
972 * name:
973 * name of the plugin
974 *
975 * values:
976 * value list to submit
977 */
978 static XS (Collectd_plugin_dispatch_values)
979 {
980 SV *values = NULL;
981 int values_idx = 0;
983 int ret = 0;
985 dXSARGS;
987 if (2 == items) {
988 log_warn ("Collectd::plugin_dispatch_values with two arguments "
989 "is deprecated - pass the type through values->{type}.");
990 values_idx = 1;
991 }
992 else if (1 != items) {
993 log_err ("Usage: Collectd::plugin_dispatch_values(values)");
994 XSRETURN_EMPTY;
995 }
997 log_debug ("Collectd::plugin_dispatch_values: values=\"%s\"",
998 SvPV_nolen (ST (values_idx)));
1000 values = ST (values_idx);
1002 if (! (SvROK (values) && (SVt_PVHV == SvTYPE (SvRV (values))))) {
1003 log_err ("Collectd::plugin_dispatch_values: Invalid values.");
1004 XSRETURN_EMPTY;
1005 }
1007 if (((2 == items) && (NULL == ST (0))) || (NULL == values))
1008 XSRETURN_EMPTY;
1010 if ((2 == items) && (NULL == hv_store ((HV *)SvRV (values), "type", 4,
1011 newSVsv (ST (0)), 0))) {
1012 log_err ("Collectd::plugin_dispatch_values: Could not store type.");
1013 XSRETURN_EMPTY;
1014 }
1016 ret = pplugin_dispatch_values (aTHX_ (HV *)SvRV (values));
1018 if (0 == ret)
1019 XSRETURN_YES;
1020 else
1021 XSRETURN_EMPTY;
1022 } /* static XS (Collectd_plugin_dispatch_values) */
1024 /*
1025 * Collectd::_plugin_flush (plugin, timeout, identifier).
1026 *
1027 * plugin:
1028 * name of the plugin to flush
1029 *
1030 * timeout:
1031 * timeout to use when flushing the data
1032 *
1033 * identifier:
1034 * data-set identifier to flush
1035 */
1036 static XS (Collectd__plugin_flush)
1037 {
1038 char *plugin = NULL;
1039 int timeout = -1;
1040 char *id = NULL;
1042 dXSARGS;
1044 if (3 != items) {
1045 log_err ("Usage: Collectd::_plugin_flush(plugin, timeout, id)");
1046 XSRETURN_EMPTY;
1047 }
1049 if (SvOK (ST (0)))
1050 plugin = SvPV_nolen (ST (0));
1052 if (SvOK (ST (1)))
1053 timeout = (int)SvIV (ST (1));
1055 if (SvOK (ST (2)))
1056 id = SvPV_nolen (ST (2));
1058 log_debug ("Collectd::_plugin_flush: plugin = \"%s\", timeout = %i, "
1059 "id = \"%s\"", plugin, timeout, id);
1061 if (0 == plugin_flush (plugin, timeout, id))
1062 XSRETURN_YES;
1063 else
1064 XSRETURN_EMPTY;
1065 } /* static XS (Collectd__plugin_flush) */
1067 /*
1068 * Collectd::plugin_dispatch_notification (notif).
1069 *
1070 * notif:
1071 * notification to dispatch
1072 */
1073 static XS (Collectd_plugin_dispatch_notification)
1074 {
1075 SV *notif = NULL;
1077 int ret = 0;
1079 dXSARGS;
1081 if (1 != items) {
1082 log_err ("Usage: Collectd::plugin_dispatch_notification(notif)");
1083 XSRETURN_EMPTY;
1084 }
1086 log_debug ("Collectd::plugin_dispatch_notification: notif = \"%s\"",
1087 SvPV_nolen (ST (0)));
1089 notif = ST (0);
1091 if (! (SvROK (notif) && (SVt_PVHV == SvTYPE (SvRV (notif))))) {
1092 log_err ("Collectd::plugin_dispatch_notification: Invalid notif.");
1093 XSRETURN_EMPTY;
1094 }
1096 ret = pplugin_dispatch_notification (aTHX_ (HV *)SvRV (notif));
1098 if (0 == ret)
1099 XSRETURN_YES;
1100 else
1101 XSRETURN_EMPTY;
1102 } /* static XS (Collectd_plugin_dispatch_notification) */
1104 /*
1105 * Collectd::plugin_log (level, message).
1106 *
1107 * level:
1108 * log level (LOG_DEBUG, ... LOG_ERR)
1109 *
1110 * message:
1111 * log message
1112 */
1113 static XS (Collectd_plugin_log)
1114 {
1115 dXSARGS;
1117 if (2 != items) {
1118 log_err ("Usage: Collectd::plugin_log(level, message)");
1119 XSRETURN_EMPTY;
1120 }
1122 plugin_log (SvIV (ST (0)), "%s", SvPV_nolen (ST (1)));
1123 XSRETURN_YES;
1124 } /* static XS (Collectd_plugin_log) */
1126 /*
1127 * Collectd::call_by_name (...).
1128 *
1129 * Call a Perl sub identified by its name passed through $Collectd::cb_name.
1130 */
1131 static XS (Collectd_call_by_name)
1132 {
1133 SV *tmp = NULL;
1134 char *name = NULL;
1136 if (NULL == (tmp = get_sv ("Collectd::cb_name", 0))) {
1137 sv_setpv (get_sv ("@", 1), "cb_name has not been set");
1138 CLEAR_STACK_FRAME;
1139 return;
1140 }
1142 name = SvPV_nolen (tmp);
1144 if (NULL == get_cv (name, 0)) {
1145 sv_setpvf (get_sv ("@", 1), "unknown callback \"%s\"", name);
1146 CLEAR_STACK_FRAME;
1147 return;
1148 }
1150 /* simply pass on the subroutine call without touching the stack,
1151 * thus leaving any arguments and return values in place */
1152 call_pv (name, 0);
1153 } /* static XS (Collectd_call_by_name) */
1155 /*
1156 * collectd's perl interpreter based thread implementation.
1157 *
1158 * This has been inspired by Perl's ithreads introduced in version 5.6.0.
1159 */
1161 /* must be called with perl_threads->mutex locked */
1162 static void c_ithread_destroy (c_ithread_t *ithread)
1163 {
1164 dTHXa (ithread->interp);
1166 assert (NULL != perl_threads);
1168 PERL_SET_CONTEXT (aTHX);
1169 log_debug ("Shutting down Perl interpreter %p...", aTHX);
1171 #if COLLECT_DEBUG
1172 sv_report_used ();
1174 --perl_threads->number_of_threads;
1175 #endif /* COLLECT_DEBUG */
1177 perl_destruct (aTHX);
1178 perl_free (aTHX);
1180 if (NULL == ithread->prev)
1181 perl_threads->head = ithread->next;
1182 else
1183 ithread->prev->next = ithread->next;
1185 if (NULL == ithread->next)
1186 perl_threads->tail = ithread->prev;
1187 else
1188 ithread->next->prev = ithread->prev;
1190 sfree (ithread);
1191 return;
1192 } /* static void c_ithread_destroy (c_ithread_t *) */
1194 static void c_ithread_destructor (void *arg)
1195 {
1196 c_ithread_t *ithread = (c_ithread_t *)arg;
1197 c_ithread_t *t = NULL;
1199 if (NULL == perl_threads)
1200 return;
1202 pthread_mutex_lock (&perl_threads->mutex);
1204 for (t = perl_threads->head; NULL != t; t = t->next)
1205 if (t == ithread)
1206 break;
1208 /* the ithread no longer exists */
1209 if (NULL == t)
1210 return;
1212 c_ithread_destroy (ithread);
1214 pthread_mutex_unlock (&perl_threads->mutex);
1215 return;
1216 } /* static void c_ithread_destructor (void *) */
1218 /* must be called with perl_threads->mutex locked */
1219 static c_ithread_t *c_ithread_create (PerlInterpreter *base)
1220 {
1221 c_ithread_t *t = NULL;
1222 dTHXa (NULL);
1224 assert (NULL != perl_threads);
1226 t = (c_ithread_t *)smalloc (sizeof (c_ithread_t));
1227 memset (t, 0, sizeof (c_ithread_t));
1229 t->interp = (NULL == base)
1230 ? NULL
1231 : perl_clone (base, CLONEf_KEEP_PTR_TABLE);
1233 aTHX = t->interp;
1235 if ((NULL != base) && (NULL != PL_endav)) {
1236 av_clear (PL_endav);
1237 av_undef (PL_endav);
1238 PL_endav = Nullav;
1239 }
1241 #if COLLECT_DEBUG
1242 ++perl_threads->number_of_threads;
1243 #endif /* COLLECT_DEBUG */
1245 t->next = NULL;
1247 if (NULL == perl_threads->tail) {
1248 perl_threads->head = t;
1249 t->prev = NULL;
1250 }
1251 else {
1252 perl_threads->tail->next = t;
1253 t->prev = perl_threads->tail;
1254 }
1256 perl_threads->tail = t;
1258 pthread_setspecific (perl_thr_key, (const void *)t);
1259 return t;
1260 } /* static c_ithread_t *c_ithread_create (PerlInterpreter *) */
1262 /*
1263 * Interface to collectd.
1264 */
1266 static int perl_init (void)
1267 {
1268 dTHX;
1270 if (NULL == perl_threads)
1271 return 0;
1273 if (NULL == aTHX) {
1274 c_ithread_t *t = NULL;
1276 pthread_mutex_lock (&perl_threads->mutex);
1277 t = c_ithread_create (perl_threads->head->interp);
1278 pthread_mutex_unlock (&perl_threads->mutex);
1280 aTHX = t->interp;
1281 }
1283 log_debug ("perl_init: c_ithread: interp = %p (active threads: %i)",
1284 aTHX, perl_threads->number_of_threads);
1285 return pplugin_call_all (aTHX_ PLUGIN_INIT);
1286 } /* static int perl_init (void) */
1288 static int perl_read (void)
1289 {
1290 dTHX;
1292 if (NULL == perl_threads)
1293 return 0;
1295 if (NULL == aTHX) {
1296 c_ithread_t *t = NULL;
1298 pthread_mutex_lock (&perl_threads->mutex);
1299 t = c_ithread_create (perl_threads->head->interp);
1300 pthread_mutex_unlock (&perl_threads->mutex);
1302 aTHX = t->interp;
1303 }
1305 log_debug ("perl_read: c_ithread: interp = %p (active threads: %i)",
1306 aTHX, perl_threads->number_of_threads);
1307 return pplugin_call_all (aTHX_ PLUGIN_READ);
1308 } /* static int perl_read (void) */
1310 static int perl_write (const data_set_t *ds, const value_list_t *vl)
1311 {
1312 dTHX;
1314 if (NULL == perl_threads)
1315 return 0;
1317 if (NULL == aTHX) {
1318 c_ithread_t *t = NULL;
1320 pthread_mutex_lock (&perl_threads->mutex);
1321 t = c_ithread_create (perl_threads->head->interp);
1322 pthread_mutex_unlock (&perl_threads->mutex);
1324 aTHX = t->interp;
1325 }
1327 log_debug ("perl_write: c_ithread: interp = %p (active threads: %i)",
1328 aTHX, perl_threads->number_of_threads);
1329 return pplugin_call_all (aTHX_ PLUGIN_WRITE, ds, vl);
1330 } /* static int perl_write (const data_set_t *, const value_list_t *) */
1332 static void perl_log (int level, const char *msg)
1333 {
1334 dTHX;
1336 if (NULL == perl_threads)
1337 return;
1339 if (NULL == aTHX) {
1340 c_ithread_t *t = NULL;
1342 pthread_mutex_lock (&perl_threads->mutex);
1343 t = c_ithread_create (perl_threads->head->interp);
1344 pthread_mutex_unlock (&perl_threads->mutex);
1346 aTHX = t->interp;
1347 }
1349 pplugin_call_all (aTHX_ PLUGIN_LOG, level, msg);
1350 return;
1351 } /* static void perl_log (int, const char *) */
1353 static int perl_notify (const notification_t *notif)
1354 {
1355 dTHX;
1357 if (NULL == perl_threads)
1358 return 0;
1360 if (NULL == aTHX) {
1361 c_ithread_t *t = NULL;
1363 pthread_mutex_lock (&perl_threads->mutex);
1364 t = c_ithread_create (perl_threads->head->interp);
1365 pthread_mutex_unlock (&perl_threads->mutex);
1367 aTHX = t->interp;
1368 }
1369 return pplugin_call_all (aTHX_ PLUGIN_NOTIF, notif);
1370 } /* static int perl_notify (const notification_t *) */
1372 static int perl_flush (int timeout, const char *identifier)
1373 {
1374 dTHX;
1376 if (NULL == perl_threads)
1377 return 0;
1379 if (NULL == aTHX) {
1380 c_ithread_t *t = NULL;
1382 pthread_mutex_lock (&perl_threads->mutex);
1383 t = c_ithread_create (perl_threads->head->interp);
1384 pthread_mutex_unlock (&perl_threads->mutex);
1386 aTHX = t->interp;
1387 }
1388 return pplugin_call_all (aTHX_ PLUGIN_FLUSH, timeout, identifier);
1389 } /* static int perl_flush (const int) */
1391 static int perl_shutdown (void)
1392 {
1393 c_ithread_t *t = NULL;
1395 int ret = 0;
1397 dTHX;
1399 plugin_unregister_complex_config ("perl");
1401 if (NULL == perl_threads)
1402 return 0;
1404 if (NULL == aTHX) {
1405 c_ithread_t *t = NULL;
1407 pthread_mutex_lock (&perl_threads->mutex);
1408 t = c_ithread_create (perl_threads->head->interp);
1409 pthread_mutex_unlock (&perl_threads->mutex);
1411 aTHX = t->interp;
1412 }
1414 log_debug ("perl_shutdown: c_ithread: interp = %p (active threads: %i)",
1415 aTHX, perl_threads->number_of_threads);
1417 plugin_unregister_log ("perl");
1418 plugin_unregister_notification ("perl");
1419 plugin_unregister_init ("perl");
1420 plugin_unregister_read ("perl");
1421 plugin_unregister_write ("perl");
1422 plugin_unregister_flush ("perl");
1424 ret = pplugin_call_all (aTHX_ PLUGIN_SHUTDOWN);
1426 pthread_mutex_lock (&perl_threads->mutex);
1427 t = perl_threads->tail;
1429 while (NULL != t) {
1430 c_ithread_t *thr = t;
1432 /* the pointer has to be advanced before destroying
1433 * the thread as this will free the memory */
1434 t = t->prev;
1436 c_ithread_destroy (thr);
1437 }
1439 pthread_mutex_unlock (&perl_threads->mutex);
1440 pthread_mutex_destroy (&perl_threads->mutex);
1442 sfree (perl_threads);
1444 pthread_key_delete (perl_thr_key);
1446 PERL_SYS_TERM ();
1448 plugin_unregister_shutdown ("perl");
1449 return ret;
1450 } /* static void perl_shutdown (void) */
1452 /*
1453 * Access functions for global variables.
1454 *
1455 * These functions implement the "magic" used to access
1456 * the global variables from Perl.
1457 */
1459 static int g_pv_get (pTHX_ SV *var, MAGIC *mg)
1460 {
1461 char *pv = mg->mg_ptr;
1462 sv_setpv (var, pv);
1463 return 0;
1464 } /* static int g_pv_get (pTHX_ SV *, MAGIC *) */
1466 static int g_pv_set (pTHX_ SV *var, MAGIC *mg)
1467 {
1468 char *pv = mg->mg_ptr;
1469 sstrncpy (pv, SvPV_nolen (var), DATA_MAX_NAME_LEN);
1470 return 0;
1471 } /* static int g_pv_set (pTHX_ SV *, MAGIC *) */
1473 static int g_iv_get (pTHX_ SV *var, MAGIC *mg)
1474 {
1475 int *iv = (int *)mg->mg_ptr;
1476 sv_setiv (var, *iv);
1477 return 0;
1478 } /* static int g_iv_get (pTHX_ SV *, MAGIC *) */
1480 static int g_iv_set (pTHX_ SV *var, MAGIC *mg)
1481 {
1482 int *iv = (int *)mg->mg_ptr;
1483 *iv = (int)SvIV (var);
1484 return 0;
1485 } /* static int g_iv_set (pTHX_ SV *, MAGIC *) */
1487 static MGVTBL g_pv_vtbl = { g_pv_get, g_pv_set, NULL, NULL, NULL, NULL, NULL };
1488 static MGVTBL g_iv_vtbl = { g_iv_get, g_iv_set, NULL, NULL, NULL, NULL, NULL };
1490 /* bootstrap the Collectd module */
1491 static void xs_init (pTHX)
1492 {
1493 HV *stash = NULL;
1494 SV *tmp = NULL;
1495 char *file = __FILE__;
1497 int i = 0;
1499 dXSUB_SYS;
1501 /* enable usage of Perl modules using shared libraries */
1502 newXS ("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
1504 /* register API */
1505 for (i = 0; NULL != api[i].f; ++i)
1506 newXS (api[i].name, api[i].f, file);
1508 stash = gv_stashpv ("Collectd", 1);
1510 /* export "constants" */
1511 for (i = 0; '\0' != constants[i].name[0]; ++i)
1512 newCONSTSUB (stash, constants[i].name, newSViv (constants[i].value));
1514 /* export global variables
1515 * by adding "magic" to the SV's representing the globale variables
1516 * perl is able to automagically call the get/set function when
1517 * accessing any such variable (this is basically the same as using
1518 * tie() in Perl) */
1519 /* global strings */
1520 for (i = 0; '\0' != g_strings[i].name[0]; ++i) {
1521 tmp = get_sv (g_strings[i].name, 1);
1522 sv_magicext (tmp, NULL, PERL_MAGIC_ext, &g_pv_vtbl,
1523 g_strings[i].var, 0);
1524 }
1526 /* global integers */
1527 for (i = 0; '\0' != g_integers[i].name[0]; ++i) {
1528 tmp = get_sv (g_integers[i].name, 1);
1529 sv_magicext (tmp, NULL, PERL_MAGIC_ext, &g_iv_vtbl,
1530 (char *)g_integers[i].var, 0);
1531 }
1532 return;
1533 } /* static void xs_init (pTHX) */
1535 /* Initialize the global Perl interpreter. */
1536 static int init_pi (int argc, char **argv)
1537 {
1538 dTHXa (NULL);
1540 if (NULL != perl_threads)
1541 return 0;
1543 log_info ("Initializing Perl interpreter...");
1544 #if COLLECT_DEBUG
1545 {
1546 int i = 0;
1548 for (i = 0; i < argc; ++i)
1549 log_debug ("argv[%i] = \"%s\"", i, argv[i]);
1550 }
1551 #endif /* COLLECT_DEBUG */
1553 if (0 != pthread_key_create (&perl_thr_key, c_ithread_destructor)) {
1554 log_err ("init_pi: pthread_key_create failed");
1556 /* this must not happen - cowardly giving up if it does */
1557 return -1;
1558 }
1560 #ifdef __FreeBSD__
1561 /* On FreeBSD, PERL_SYS_INIT3 expands to some expression which
1562 * triggers a "value computed is not used" warning by gcc. */
1563 (void)
1564 #endif
1565 PERL_SYS_INIT3 (&argc, &argv, &environ);
1567 perl_threads = (c_ithread_list_t *)smalloc (sizeof (c_ithread_list_t));
1568 memset (perl_threads, 0, sizeof (c_ithread_list_t));
1570 pthread_mutex_init (&perl_threads->mutex, NULL);
1571 /* locking the mutex should not be necessary at this point
1572 * but let's just do it for the sake of completeness */
1573 pthread_mutex_lock (&perl_threads->mutex);
1575 perl_threads->head = c_ithread_create (NULL);
1576 perl_threads->tail = perl_threads->head;
1578 if (NULL == (perl_threads->head->interp = perl_alloc ())) {
1579 log_err ("init_pi: Not enough memory.");
1580 exit (3);
1581 }
1583 aTHX = perl_threads->head->interp;
1584 pthread_mutex_unlock (&perl_threads->mutex);
1586 perl_construct (aTHX);
1588 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
1590 if (0 != perl_parse (aTHX_ xs_init, argc, argv, NULL)) {
1591 SV *err = get_sv ("@", 1);
1592 log_err ("init_pi: Unable to bootstrap Collectd: %s",
1593 SvPV_nolen (err));
1595 perl_destruct (perl_threads->head->interp);
1596 perl_free (perl_threads->head->interp);
1597 sfree (perl_threads);
1599 pthread_key_delete (perl_thr_key);
1600 return -1;
1601 }
1603 /* Set $0 to "collectd" because perl_parse() has to set it to "-e". */
1604 sv_setpv (get_sv ("0", 0), "collectd");
1606 perl_run (aTHX);
1608 plugin_register_log ("perl", perl_log);
1609 plugin_register_notification ("perl", perl_notify);
1610 plugin_register_init ("perl", perl_init);
1612 plugin_register_read ("perl", perl_read);
1614 plugin_register_write ("perl", perl_write);
1615 plugin_register_flush ("perl", perl_flush);
1616 plugin_register_shutdown ("perl", perl_shutdown);
1617 return 0;
1618 } /* static int init_pi (const char **, const int) */
1620 /*
1621 * LoadPlugin "<Plugin>"
1622 */
1623 static int perl_config_loadplugin (pTHX_ oconfig_item_t *ci)
1624 {
1625 char module_name[DATA_MAX_NAME_LEN];
1627 char *value = NULL;
1629 if ((0 != ci->children_num) || (1 != ci->values_num)
1630 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1631 log_err ("LoadPlugin expects a single string argument.");
1632 return 1;
1633 }
1635 value = ci->values[0].value.string;
1637 if (NULL == get_module_name (module_name, sizeof (module_name), value)) {
1638 log_err ("Invalid module name %s", value);
1639 return (1);
1640 }
1642 if (0 != init_pi (perl_argc, perl_argv))
1643 return -1;
1645 assert (NULL != perl_threads);
1646 assert (NULL != perl_threads->head);
1648 aTHX = perl_threads->head->interp;
1650 log_debug ("perl_config: loading perl plugin \"%s\"", value);
1651 load_module (PERL_LOADMOD_NOIMPORT,
1652 newSVpv (module_name, strlen (module_name)), Nullsv);
1653 return 0;
1654 } /* static int perl_config_loadplugin (oconfig_item_it *) */
1656 /*
1657 * BaseName "<Name>"
1658 */
1659 static int perl_config_basename (pTHX_ oconfig_item_t *ci)
1660 {
1661 char *value = NULL;
1663 if ((0 != ci->children_num) || (1 != ci->values_num)
1664 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1665 log_err ("BaseName expects a single string argument.");
1666 return 1;
1667 }
1669 value = ci->values[0].value.string;
1671 log_debug ("perl_config: Setting plugin basename to \"%s\"", value);
1672 sstrncpy (base_name, value, sizeof (base_name));
1673 return 0;
1674 } /* static int perl_config_basename (oconfig_item_it *) */
1676 /*
1677 * EnableDebugger "<Package>"|""
1678 */
1679 static int perl_config_enabledebugger (pTHX_ oconfig_item_t *ci)
1680 {
1681 char *value = NULL;
1683 if ((0 != ci->children_num) || (1 != ci->values_num)
1684 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1685 log_err ("EnableDebugger expects a single string argument.");
1686 return 1;
1687 }
1689 if (NULL != perl_threads) {
1690 log_warn ("EnableDebugger has no effects if used after LoadPlugin.");
1691 return 1;
1692 }
1694 value = ci->values[0].value.string;
1696 perl_argv = (char **)realloc (perl_argv,
1697 (++perl_argc + 1) * sizeof (char *));
1699 if (NULL == perl_argv) {
1700 log_err ("perl_config: Not enough memory.");
1701 exit (3);
1702 }
1704 if ('\0' == value[0]) {
1705 perl_argv[perl_argc - 1] = "-d";
1706 }
1707 else {
1708 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 4);
1709 sstrncpy (perl_argv[perl_argc - 1], "-d:", 4);
1710 sstrncpy (perl_argv[perl_argc - 1] + 3, value, strlen (value) + 1);
1711 }
1713 perl_argv[perl_argc] = NULL;
1714 return 0;
1715 } /* static int perl_config_enabledebugger (oconfig_item_it *) */
1717 /*
1718 * IncludeDir "<Dir>"
1719 */
1720 static int perl_config_includedir (pTHX_ oconfig_item_t *ci)
1721 {
1722 char *value = NULL;
1724 if ((0 != ci->children_num) || (1 != ci->values_num)
1725 || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1726 log_err ("IncludeDir expects a single string argument.");
1727 return 1;
1728 }
1730 value = ci->values[0].value.string;
1732 if (NULL == aTHX) {
1733 perl_argv = (char **)realloc (perl_argv,
1734 (++perl_argc + 1) * sizeof (char *));
1736 if (NULL == perl_argv) {
1737 log_err ("perl_config: Not enough memory.");
1738 exit (3);
1739 }
1741 perl_argv[perl_argc - 1] = (char *)smalloc (strlen (value) + 3);
1742 sstrncpy(perl_argv[perl_argc - 1], "-I", 3);
1743 sstrncpy(perl_argv[perl_argc - 1] + 2, value, strlen (value) + 1);
1745 perl_argv[perl_argc] = NULL;
1746 }
1747 else {
1748 /* prepend the directory to @INC */
1749 av_unshift (GvAVn (PL_incgv), 1);
1750 av_store (GvAVn (PL_incgv), 0, newSVpv (value, strlen (value)));
1751 }
1752 return 0;
1753 } /* static int perl_config_includedir (oconfig_item_it *) */
1755 /*
1756 * <Plugin> block
1757 */
1758 static int perl_config_plugin (pTHX_ oconfig_item_t *ci)
1759 {
1760 int retvals = 0;
1761 int ret = 0;
1763 char *plugin;
1764 HV *config;
1766 dSP;
1768 if ((1 != ci->values_num) || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
1769 log_err ("LoadPlugin expects a single string argument.");
1770 return 1;
1771 }
1773 plugin = ci->values[0].value.string;
1774 config = newHV ();
1776 if (0 != oconfig_item2hv (aTHX_ ci, config)) {
1777 hv_clear (config);
1778 hv_undef (config);
1780 log_err ("Unable to convert configuration to a Perl hash value.");
1781 config = Nullhv;
1782 }
1784 ENTER;
1785 SAVETMPS;
1787 PUSHMARK (SP);
1789 XPUSHs (sv_2mortal (newSVpv (plugin, 0)));
1790 XPUSHs (sv_2mortal (newRV_noinc ((SV *)config)));
1792 PUTBACK;
1794 retvals = call_pv ("Collectd::_plugin_dispatch_config", G_SCALAR);
1796 SPAGAIN;
1797 if (0 < retvals) {
1798 SV *tmp = POPs;
1799 if (! SvTRUE (tmp))
1800 ret = 1;
1801 }
1802 else
1803 ret = 1;
1805 PUTBACK;
1806 FREETMPS;
1807 LEAVE;
1808 return ret;
1809 } /* static int perl_config_plugin (oconfig_item_it *) */
1811 static int perl_config (oconfig_item_t *ci)
1812 {
1813 int status = 0;
1814 int i = 0;
1816 dTHXa (NULL);
1818 for (i = 0; i < ci->children_num; ++i) {
1819 oconfig_item_t *c = ci->children + i;
1820 int current_status = 0;
1822 if (NULL != perl_threads)
1823 aTHX = PERL_GET_CONTEXT;
1825 if (0 == strcasecmp (c->key, "LoadPlugin"))
1826 current_status = perl_config_loadplugin (aTHX_ c);
1827 else if (0 == strcasecmp (c->key, "BaseName"))
1828 current_status = perl_config_basename (aTHX_ c);
1829 else if (0 == strcasecmp (c->key, "EnableDebugger"))
1830 current_status = perl_config_enabledebugger (aTHX_ c);
1831 else if (0 == strcasecmp (c->key, "IncludeDir"))
1832 current_status = perl_config_includedir (aTHX_ c);
1833 else if (0 == strcasecmp (c->key, "Plugin"))
1834 current_status = perl_config_plugin (aTHX_ c);
1835 else
1836 {
1837 log_warn ("Ignoring unknown config key \"%s\".", c->key);
1838 current_status = 0;
1839 }
1841 /* fatal error - it's up to perl_config_* to clean up */
1842 if (0 > current_status) {
1843 log_err ("Configuration failed with a fatal error - "
1844 "plugin disabled!");
1845 return current_status;
1846 }
1848 status += current_status;
1849 }
1850 return status;
1851 } /* static int perl_config (oconfig_item_t *) */
1853 void module_register (void)
1854 {
1855 perl_argc = 4;
1856 perl_argv = (char **)smalloc ((perl_argc + 1) * sizeof (char *));
1858 /* default options for the Perl interpreter */
1859 perl_argv[0] = "";
1860 perl_argv[1] = "-MCollectd";
1861 perl_argv[2] = "-e";
1862 perl_argv[3] = "1";
1863 perl_argv[4] = NULL;
1865 plugin_register_complex_config ("perl", perl_config);
1866 return;
1867 } /* void module_register (void) */
1869 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */