2 * collectd - src/sysevent.c
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
24 * Andrew Bays <abays at redhat.com>
31 #include "utils_complain.h"
32 #include "utils_ignorelist.h"
34 #include <asm/types.h>
37 #include <netinet/in.h>
42 #include <sys/socket.h>
45 #include <yajl/yajl_common.h>
46 #include <yajl/yajl_gen.h>
48 #if HAVE_YAJL_YAJL_VERSION_H
49 #include <yajl/yajl_version.h>
51 #if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1)
52 #include <yajl/yajl_tree.h>
53 #define HAVE_YAJL_V2 1
56 #define SYSEVENT_DOMAIN_FIELD "domain"
57 #define SYSEVENT_DOMAIN_VALUE "syslog"
58 #define SYSEVENT_EVENT_ID_FIELD "eventId"
59 #define SYSEVENT_EVENT_NAME_FIELD "eventName"
60 #define SYSEVENT_EVENT_NAME_VALUE "syslog message"
61 #define SYSEVENT_LAST_EPOCH_MICROSEC_FIELD "lastEpochMicrosec"
62 #define SYSEVENT_PRIORITY_FIELD "priority"
63 #define SYSEVENT_PRIORITY_VALUE_HIGH "high"
64 #define SYSEVENT_PRIORITY_VALUE_LOW "low"
65 #define SYSEVENT_PRIORITY_VALUE_MEDIUM "medium"
66 #define SYSEVENT_PRIORITY_VALUE_NORMAL "normal"
67 #define SYSEVENT_PRIORITY_VALUE_UNKNOWN "unknown"
68 #define SYSEVENT_REPORTING_ENTITY_NAME_FIELD "reportingEntityName"
69 #define SYSEVENT_REPORTING_ENTITY_NAME_VALUE "collectd sysevent plugin"
70 #define SYSEVENT_SEQUENCE_FIELD "sequence"
71 #define SYSEVENT_SEQUENCE_VALUE "0"
72 #define SYSEVENT_SOURCE_NAME_FIELD "sourceName"
73 #define SYSEVENT_SOURCE_NAME_VALUE "syslog"
74 #define SYSEVENT_START_EPOCH_MICROSEC_FIELD "startEpochMicrosec"
75 #define SYSEVENT_VERSION_FIELD "version"
76 #define SYSEVENT_VERSION_VALUE "1.0"
78 #define SYSEVENT_EVENT_SOURCE_HOST_FIELD "eventSourceHost"
79 #define SYSEVENT_EVENT_SOURCE_TYPE_FIELD "eventSourceType"
80 #define SYSEVENT_EVENT_SOURCE_TYPE_VALUE "host"
81 #define SYSEVENT_SYSLOG_FIELDS_FIELD "syslogFields"
82 #define SYSEVENT_SYSLOG_FIELDS_VERSION_FIELD "syslogFieldsVersion"
83 #define SYSEVENT_SYSLOG_FIELDS_VERSION_VALUE "1.0"
84 #define SYSEVENT_SYSLOG_MSG_FIELD "syslogMsg"
85 #define SYSEVENT_SYSLOG_PROC_FIELD "syslogProc"
86 #define SYSEVENT_SYSLOG_SEV_FIELD "syslogSev"
87 #define SYSEVENT_SYSLOG_TAG_FIELD "syslogTag"
88 #define SYSEVENT_SYSLOG_TAG_VALUE "NILVALUE"
99 long long unsigned int *timestamp;
105 static ignorelist_t *ignorelist = NULL;
107 static int sysevent_thread_loop = 0;
108 static int sysevent_thread_error = 0;
109 static pthread_t sysevent_thread_id;
110 static pthread_mutex_t sysevent_lock = PTHREAD_MUTEX_INITIALIZER;
111 static int sock = -1;
112 static int event_id = 0;
113 static circbuf_t ring;
115 static char *listen_ip;
116 static char *listen_port;
117 static int listen_buffer_size = 4096;
118 static int buffer_length = 10;
120 static int monitor_all_messages = 1;
123 static const char *rsyslog_keys[3] = {"@timestamp", "@source_host", "@message"};
124 static const char *rsyslog_field_keys[5] = {
125 "facility", "severity", "severity-num", "program", "processid"};
132 static int gen_message_payload(const char *msg, char *sev, int sev_num,
133 char *process, char *host,
134 long long unsigned int timestamp, char **buf) {
135 const unsigned char *buf2;
137 char json_str[DATA_MAX_NAME_LEN];
139 #if !defined(HAVE_YAJL_V2)
140 yajl_gen_config conf = {};
147 g = yajl_gen_alloc(NULL);
148 yajl_gen_config(g, yajl_gen_beautify, 0);
151 g = yajl_gen_alloc(&conf, NULL);
156 // *** BEGIN common event header ***
158 if (yajl_gen_map_open(g) != yajl_gen_status_ok)
162 if (yajl_gen_string(g, (u_char *)SYSEVENT_DOMAIN_FIELD,
163 strlen(SYSEVENT_DOMAIN_FIELD)) != yajl_gen_status_ok)
166 if (yajl_gen_string(g, (u_char *)SYSEVENT_DOMAIN_VALUE,
167 strlen(SYSEVENT_DOMAIN_VALUE)) != yajl_gen_status_ok)
171 if (yajl_gen_string(g, (u_char *)SYSEVENT_EVENT_ID_FIELD,
172 strlen(SYSEVENT_EVENT_ID_FIELD)) != yajl_gen_status_ok)
175 event_id = event_id + 1;
176 int event_id_len = sizeof(char) * sizeof(int) * 4 + 1;
177 memset(json_str, '\0', DATA_MAX_NAME_LEN);
178 snprintf(json_str, event_id_len, "%d", event_id);
180 if (yajl_gen_number(g, json_str, strlen(json_str)) != yajl_gen_status_ok) {
185 if (yajl_gen_string(g, (u_char *)SYSEVENT_EVENT_NAME_FIELD,
186 strlen(SYSEVENT_EVENT_NAME_FIELD)) != yajl_gen_status_ok)
189 int event_name_len = 0;
190 event_name_len = event_name_len + strlen(host); // host name
193 22; // "host", "rsyslog", "message", 3 spaces and null-terminator
194 memset(json_str, '\0', DATA_MAX_NAME_LEN);
195 snprintf(json_str, event_name_len, "host %s rsyslog message", host);
197 if (yajl_gen_string(g, (u_char *)json_str, strlen(json_str)) !=
198 yajl_gen_status_ok) {
203 if (yajl_gen_string(g, (u_char *)SYSEVENT_LAST_EPOCH_MICROSEC_FIELD,
204 strlen(SYSEVENT_LAST_EPOCH_MICROSEC_FIELD)) !=
208 int last_epoch_microsec_len =
209 sizeof(char) * sizeof(long long unsigned int) * 4 + 1;
210 memset(json_str, '\0', DATA_MAX_NAME_LEN);
211 snprintf(json_str, last_epoch_microsec_len, "%llu",
212 (long long unsigned int)CDTIME_T_TO_US(cdtime()));
214 if (yajl_gen_number(g, json_str, strlen(json_str)) != yajl_gen_status_ok) {
219 if (yajl_gen_string(g, (u_char *)SYSEVENT_PRIORITY_FIELD,
220 strlen(SYSEVENT_PRIORITY_FIELD)) != yajl_gen_status_ok)
225 if (yajl_gen_string(g, (u_char *)SYSEVENT_PRIORITY_VALUE_MEDIUM,
226 strlen(SYSEVENT_PRIORITY_VALUE_MEDIUM)) !=
231 if (yajl_gen_string(g, (u_char *)SYSEVENT_PRIORITY_VALUE_NORMAL,
232 strlen(SYSEVENT_PRIORITY_VALUE_NORMAL)) !=
238 if (yajl_gen_string(g, (u_char *)SYSEVENT_PRIORITY_VALUE_LOW,
239 strlen(SYSEVENT_PRIORITY_VALUE_LOW)) !=
244 if (yajl_gen_string(g, (u_char *)SYSEVENT_PRIORITY_VALUE_UNKNOWN,
245 strlen(SYSEVENT_PRIORITY_VALUE_UNKNOWN)) !=
251 // reportingEntityName
252 if (yajl_gen_string(g, (u_char *)SYSEVENT_REPORTING_ENTITY_NAME_FIELD,
253 strlen(SYSEVENT_REPORTING_ENTITY_NAME_FIELD)) !=
257 if (yajl_gen_string(g, (u_char *)SYSEVENT_REPORTING_ENTITY_NAME_VALUE,
258 strlen(SYSEVENT_REPORTING_ENTITY_NAME_VALUE)) !=
263 if (yajl_gen_string(g, (u_char *)SYSEVENT_SEQUENCE_FIELD,
264 strlen(SYSEVENT_SEQUENCE_FIELD)) != yajl_gen_status_ok)
267 if (yajl_gen_number(g, SYSEVENT_SEQUENCE_VALUE,
268 strlen(SYSEVENT_SEQUENCE_VALUE)) != yajl_gen_status_ok)
272 if (yajl_gen_string(g, (u_char *)SYSEVENT_SOURCE_NAME_FIELD,
273 strlen(SYSEVENT_SOURCE_NAME_FIELD)) != yajl_gen_status_ok)
276 if (yajl_gen_string(g, (u_char *)SYSEVENT_SOURCE_NAME_VALUE,
277 strlen(SYSEVENT_SOURCE_NAME_VALUE)) != yajl_gen_status_ok)
280 // startEpochMicrosec
281 if (yajl_gen_string(g, (u_char *)SYSEVENT_START_EPOCH_MICROSEC_FIELD,
282 strlen(SYSEVENT_START_EPOCH_MICROSEC_FIELD)) !=
286 int start_epoch_microsec_len =
287 sizeof(char) * sizeof(long long unsigned int) * 4 + 1;
288 memset(json_str, '\0', DATA_MAX_NAME_LEN);
289 snprintf(json_str, start_epoch_microsec_len, "%llu",
290 (long long unsigned int)timestamp);
292 if (yajl_gen_number(g, json_str, strlen(json_str)) != yajl_gen_status_ok) {
297 if (yajl_gen_string(g, (u_char *)SYSEVENT_VERSION_FIELD,
298 strlen(SYSEVENT_VERSION_FIELD)) != yajl_gen_status_ok)
301 if (yajl_gen_number(g, SYSEVENT_VERSION_VALUE,
302 strlen(SYSEVENT_VERSION_VALUE)) != yajl_gen_status_ok)
305 // *** END common event header ***
307 // *** BEGIN syslog fields ***
309 if (yajl_gen_string(g, (u_char *)SYSEVENT_SYSLOG_FIELDS_FIELD,
310 strlen(SYSEVENT_SYSLOG_FIELDS_FIELD)) !=
314 if (yajl_gen_map_open(g) != yajl_gen_status_ok)
318 if (yajl_gen_string(g, (u_char *)SYSEVENT_EVENT_SOURCE_HOST_FIELD,
319 strlen(SYSEVENT_EVENT_SOURCE_HOST_FIELD)) !=
323 if (yajl_gen_string(g, (u_char *)host, strlen(host)) != yajl_gen_status_ok)
327 if (yajl_gen_string(g, (u_char *)SYSEVENT_EVENT_SOURCE_TYPE_FIELD,
328 strlen(SYSEVENT_EVENT_SOURCE_TYPE_FIELD)) !=
332 if (yajl_gen_string(g, (u_char *)SYSEVENT_EVENT_SOURCE_TYPE_VALUE,
333 strlen(SYSEVENT_EVENT_SOURCE_TYPE_VALUE)) !=
337 // syslogFieldsVersion
338 if (yajl_gen_string(g, (u_char *)SYSEVENT_SYSLOG_FIELDS_VERSION_FIELD,
339 strlen(SYSEVENT_SYSLOG_FIELDS_VERSION_FIELD)) !=
343 if (yajl_gen_number(g, SYSEVENT_SYSLOG_FIELDS_VERSION_VALUE,
344 strlen(SYSEVENT_SYSLOG_FIELDS_VERSION_VALUE)) !=
348 if (yajl_gen_map_close(g) != yajl_gen_status_ok)
353 if (yajl_gen_string(g, (u_char *)SYSEVENT_SYSLOG_MSG_FIELD,
354 strlen(SYSEVENT_SYSLOG_MSG_FIELD)) !=
358 if (yajl_gen_string(g, (u_char *)msg, strlen(msg)) != yajl_gen_status_ok)
363 if (process != NULL) {
364 if (yajl_gen_string(g, (u_char *)SYSEVENT_SYSLOG_PROC_FIELD,
365 strlen(SYSEVENT_SYSLOG_PROC_FIELD)) !=
369 if (yajl_gen_string(g, (u_char *)process, strlen(process)) !=
376 if (yajl_gen_string(g, (u_char *)SYSEVENT_SYSLOG_SEV_FIELD,
377 strlen(SYSEVENT_SYSLOG_SEV_FIELD)) !=
381 if (yajl_gen_string(g, (u_char *)sev, strlen(sev)) != yajl_gen_status_ok)
386 if (yajl_gen_string(g, (u_char *)SYSEVENT_SYSLOG_TAG_FIELD,
387 strlen(SYSEVENT_SYSLOG_TAG_FIELD)) != yajl_gen_status_ok)
390 if (yajl_gen_string(g, (u_char *)SYSEVENT_SYSLOG_TAG_VALUE,
391 strlen(SYSEVENT_SYSLOG_TAG_VALUE)) != yajl_gen_status_ok)
394 // *** END syslog fields ***
396 if (yajl_gen_map_close(g) != yajl_gen_status_ok)
399 if (yajl_gen_get_buf(g, &buf2, &len) != yajl_gen_status_ok)
402 *buf = malloc(strlen((char *)buf2) + 1);
404 sstrncpy(*buf, (char *)buf2, strlen((char *)buf2) + 1);
412 ERROR("sysevent plugin: gen_message_payload failed to generate JSON");
416 static void *sysevent_thread(void *arg) /* {{{ */
418 pthread_mutex_lock(&sysevent_lock);
420 while (sysevent_thread_loop > 0) {
423 pthread_mutex_unlock(&sysevent_lock);
428 char buffer[listen_buffer_size];
429 struct sockaddr_storage src_addr;
430 socklen_t src_addr_len = sizeof(src_addr);
432 memset(buffer, '\0', listen_buffer_size);
434 ssize_t count = recvfrom(sock, buffer, sizeof(buffer), 0,
435 (struct sockaddr *)&src_addr, &src_addr_len);
438 ERROR("sysevent plugin: failed to receive data: %s", strerror(errno));
440 } else if (count >= sizeof(buffer)) {
441 WARNING("sysevent plugin: datagram too large for buffer: truncated");
444 // 2. Push to buffer if there is room, otherwise raise warning
446 pthread_mutex_lock(&sysevent_lock);
448 int next = ring.head + 1;
449 if (next >= ring.maxLen)
452 if (next == ring.tail) {
453 WARNING("sysevent plugin: ring buffer full");
455 DEBUG("sysevent plugin: writing %s", buffer);
457 strncpy(ring.buffer[ring.head], buffer, sizeof(buffer));
458 ring.timestamp[ring.head] =
459 (long long unsigned int)CDTIME_T_TO_US(cdtime());
463 pthread_mutex_unlock(&sysevent_lock);
468 pthread_mutex_lock(&sysevent_lock);
471 WARNING("sysevent plugin: problem with thread status: %d", status);
472 sysevent_thread_error = 1;
476 if (sysevent_thread_loop <= 0)
478 } /* while (sysevent_thread_loop > 0) */
480 pthread_mutex_unlock(&sysevent_lock);
482 // pthread_exit instead of return?
484 } /* }}} void *sysevent_thread */
486 static int start_thread(void) /* {{{ */
490 pthread_mutex_lock(&sysevent_lock);
492 if (sysevent_thread_loop != 0) {
493 pthread_mutex_unlock(&sysevent_lock);
497 sysevent_thread_loop = 1;
498 sysevent_thread_error = 0;
500 DEBUG("sysevent plugin: starting thread");
502 status = plugin_thread_create(&sysevent_thread_id, /* attr = */ NULL,
504 /* arg = */ (void *)0, "sysevent");
506 sysevent_thread_loop = 0;
507 ERROR("sysevent plugin: starting thread failed.");
508 pthread_mutex_unlock(&sysevent_lock);
512 pthread_mutex_unlock(&sysevent_lock);
514 } /* }}} int start_thread */
516 static int stop_thread(int shutdown) /* {{{ */
520 pthread_mutex_lock(&sysevent_lock);
522 if (sysevent_thread_loop == 0) {
523 pthread_mutex_unlock(&sysevent_lock);
527 sysevent_thread_loop = 0;
528 pthread_mutex_unlock(&sysevent_lock);
531 // Since the thread is blocking, calling pthread_join
532 // doesn't actually succeed in stopping it. It will stick around
533 // until a message is received on the socket (at which
534 // it will realize that "sysevent_thread_loop" is 0 and will
535 // break out of the read loop and be allowed to die). This is
536 // fine when the process isn't supposed to be exiting, but in
537 // the case of a process shutdown, we don't want to have an
538 // idle thread hanging around. Calling pthread_cancel here in
539 // the case of a shutdown is just assures that the thread is
540 // gone and that the process has been fully terminated.
542 DEBUG("sysevent plugin: Canceling thread for process shutdown");
544 status = pthread_cancel(sysevent_thread_id);
547 ERROR("sysevent plugin: Unable to cancel thread: %d (%s)", status,
552 status = pthread_join(sysevent_thread_id, /* return = */ NULL);
554 ERROR("sysevent plugin: Stopping thread failed.");
559 pthread_mutex_lock(&sysevent_lock);
560 memset(&sysevent_thread_id, 0, sizeof(sysevent_thread_id));
561 sysevent_thread_error = 0;
562 pthread_mutex_unlock(&sysevent_lock);
564 DEBUG("sysevent plugin: Finished requesting stop of thread");
567 } /* }}} int stop_thread */
569 static int sysevent_init(void) /* {{{ */
573 ring.maxLen = buffer_length;
574 ring.buffer = (char **)malloc(buffer_length * sizeof(char *));
576 for (int i = 0; i < buffer_length; i++) {
577 ring.buffer[i] = malloc(listen_buffer_size);
580 ring.timestamp = (long long unsigned int *)malloc(
581 buffer_length * sizeof(long long unsigned int));
584 const char *hostname = listen_ip;
585 const char *portname = listen_port;
586 struct addrinfo hints;
587 memset(&hints, 0, sizeof(hints));
588 hints.ai_family = AF_UNSPEC;
589 hints.ai_socktype = SOCK_DGRAM;
590 hints.ai_protocol = 0;
591 hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
592 struct addrinfo *res = 0;
594 int err = getaddrinfo(hostname, portname, &hints, &res);
597 ERROR("sysevent plugin: failed to resolve local socket address (err=%d)",
603 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
605 ERROR("sysevent plugin: failed to open socket: %s", strerror(errno));
610 if (bind(sock, res->ai_addr, res->ai_addrlen) == -1) {
611 ERROR("sysevent plugin: failed to bind socket: %s", strerror(errno));
619 DEBUG("sysevent plugin: socket created and bound");
621 return (start_thread());
622 } /* }}} int sysevent_init */
624 static int sysevent_config_add_listen(const oconfig_item_t *ci) /* {{{ */
626 if (ci->values_num != 2 || ci->values[0].type != OCONFIG_TYPE_STRING ||
627 ci->values[1].type != OCONFIG_TYPE_STRING) {
628 ERROR("sysevent plugin: The `%s' config option needs "
629 "two string arguments (ip and port).",
634 listen_ip = strdup(ci->values[0].value.string);
635 listen_port = strdup(ci->values[1].value.string);
640 static int sysevent_config_add_buffer_size(const oconfig_item_t *ci) /* {{{ */
644 if (cf_util_get_int(ci, &tmp) != 0)
646 else if ((tmp >= 1024) && (tmp <= 65535))
647 listen_buffer_size = tmp;
650 "sysevent plugin: The `BufferSize' must be between 1024 and 65535.");
657 static int sysevent_config_add_buffer_length(const oconfig_item_t *ci) /* {{{ */
661 if (cf_util_get_int(ci, &tmp) != 0)
663 else if ((tmp >= 3) && (tmp <= 4096))
666 WARNING("sysevent plugin: The `Bufferlength' must be between 3 and 4096.");
673 static int sysevent_config_add_regex_filter(const oconfig_item_t *ci) /* {{{ */
675 if (ci->values_num != 1 || ci->values[0].type != OCONFIG_TYPE_STRING) {
676 ERROR("sysevent plugin: The `%s' config option needs "
677 "one string argument, a regular expression.",
683 if (ignorelist == NULL)
684 ignorelist = ignorelist_create(/* invert = */ 1);
686 int status = ignorelist_add(ignorelist, ci->values[0].value.string);
689 ERROR("sysevent plugin: invalid regular expression: %s",
690 ci->values[0].value.string);
694 monitor_all_messages = 0;
696 WARNING("sysevent plugin: The plugin has been compiled without support "
697 "for the \"RegexFilter\" option.");
703 static int sysevent_config(oconfig_item_t *ci) /* {{{ */
705 for (int i = 0; i < ci->children_num; i++) {
706 oconfig_item_t *child = ci->children + i;
708 if (strcasecmp("Listen", child->key) == 0)
709 sysevent_config_add_listen(child);
710 else if (strcasecmp("BufferSize", child->key) == 0)
711 sysevent_config_add_buffer_size(child);
712 else if (strcasecmp("BufferLength", child->key) == 0)
713 sysevent_config_add_buffer_length(child);
714 else if (strcasecmp("RegexFilter", child->key) == 0)
715 sysevent_config_add_regex_filter(child);
717 WARNING("sysevent plugin: Option `%s' is not allowed here.", child->key);
722 } /* }}} int sysevent_config */
724 static void sysevent_dispatch_notification(const char *message,
728 long long unsigned int timestamp) {
730 notification_t n = {NOTIF_OKAY, cdtime(), "", "", "sysevent",
735 // If we have a parsed-JSON node to work with, use that
737 char process[listen_buffer_size];
738 char severity[listen_buffer_size];
739 char sev_num_str[listen_buffer_size];
740 char msg[listen_buffer_size];
741 char hostname_str[listen_buffer_size];
745 const char *msg_path[] = {rsyslog_keys[2], (const char *)0};
746 yajl_val msg_v = yajl_tree_get(*node, msg_path, yajl_t_string);
749 memset(msg, '\0', listen_buffer_size);
750 snprintf(msg, listen_buffer_size, "%s%c", YAJL_GET_STRING(msg_v), '\0');
754 const char *severity_path[] = {"@fields", rsyslog_field_keys[1],
756 yajl_val severity_v = yajl_tree_get(*node, severity_path, yajl_t_string);
758 if (severity_v != NULL) {
759 memset(severity, '\0', listen_buffer_size);
760 snprintf(severity, listen_buffer_size, "%s%c",
761 YAJL_GET_STRING(severity_v), '\0');
765 const char *sev_num_str_path[] = {"@fields", rsyslog_field_keys[2],
767 yajl_val sev_num_str_v =
768 yajl_tree_get(*node, sev_num_str_path, yajl_t_string);
770 if (sev_num_str_v != NULL) {
771 memset(sev_num_str, '\0', listen_buffer_size);
772 snprintf(sev_num_str, listen_buffer_size, "%s%c",
773 YAJL_GET_STRING(sev_num_str_v), '\0');
775 sev_num = atoi(sev_num_str);
778 n.severity = NOTIF_FAILURE;
782 const char *process_path[] = {"@fields", rsyslog_field_keys[3],
784 yajl_val process_v = yajl_tree_get(*node, process_path, yajl_t_string);
786 if (process_v != NULL) {
787 memset(process, '\0', listen_buffer_size);
788 snprintf(process, listen_buffer_size, "%s%c", YAJL_GET_STRING(process_v),
793 const char *hostname_path[] = {rsyslog_keys[1], (const char *)0};
794 yajl_val hostname_v = yajl_tree_get(*node, hostname_path, yajl_t_string);
796 if (hostname_v != NULL) {
797 memset(hostname_str, '\0', listen_buffer_size);
798 snprintf(hostname_str, listen_buffer_size, "%s%c",
799 YAJL_GET_STRING(hostname_v), '\0');
803 (msg_v != NULL ? msg : NULL), (severity_v != NULL ? severity : NULL),
804 (sev_num_str_v != NULL ? sev_num : -1),
805 (process_v != NULL ? process : NULL),
806 (hostname_v != NULL ? hostname_str : hostname_g), timestamp, &buf);
808 // Data was not sent in JSON format, so just treat the whole log entry
809 // as the message (and we'll be unable to acquire certain data, so the
811 // generated below will be less informative)
813 gen_message_payload(message, NULL, -1, NULL, hostname_g, timestamp, &buf);
816 gen_message_payload(message, NULL, -1, NULL, hostname_g, timestamp, &buf);
819 sstrncpy(n.host, hostname_g, sizeof(n.host));
820 sstrncpy(n.type, "gauge", sizeof(n.type));
822 notification_meta_t *m = calloc(1, sizeof(*m));
827 ERROR("sysevent plugin: unable to allocate metadata: %s",
828 sstrerror(errno, errbuf, sizeof(errbuf)));
832 sstrncpy(m->name, "ves", sizeof(m->name));
833 m->nm_value.nm_string = sstrdup(buf);
834 m->type = NM_TYPE_STRING;
837 DEBUG("sysevent plugin: notification message: %s",
838 n.meta->nm_value.nm_string);
840 DEBUG("sysevent plugin: dispatching message");
842 plugin_dispatch_notification(&n);
843 plugin_notification_meta_free(n.meta);
845 // malloc'd in gen_message_payload
850 static int sysevent_read(void) /* {{{ */
852 if (sysevent_thread_error != 0) {
853 ERROR("sysevent plugin: The sysevent thread had a problem (%d). Restarting "
855 sysevent_thread_error);
862 } /* if (sysevent_thread_error != 0) */
864 pthread_mutex_lock(&sysevent_lock);
866 while (ring.head != ring.tail) {
867 long long unsigned int timestamp;
869 char *match_str = NULL;
870 int next = ring.tail + 1;
872 if (next >= ring.maxLen)
875 DEBUG("sysevent plugin: reading from ring buffer: %s",
876 ring.buffer[ring.tail]);
878 timestamp = ring.timestamp[ring.tail];
881 // Try to parse JSON, and if it fails, fall back to plain string
882 yajl_val node = NULL;
885 node = yajl_tree_parse((const char *)ring.buffer[ring.tail], errbuf,
891 // If we have any regex filters, we need to see if the message portion of
892 // the data matches any of them (otherwise we're not interested)
893 if (monitor_all_messages == 0) {
894 char json_val[listen_buffer_size];
895 const char *path[] = {"@message", (const char *)0};
896 yajl_val v = yajl_tree_get(node, path, yajl_t_string);
898 memset(json_val, '\0', listen_buffer_size);
900 snprintf(json_val, listen_buffer_size, "%s%c", YAJL_GET_STRING(v),
903 match_str = (char *)&json_val;
906 // non-JSON rsyslog data
908 // If we have any regex filters, we need to see if the message data
909 // matches any of them (otherwise we're not interested)
910 if (monitor_all_messages == 0)
911 match_str = ring.buffer[ring.tail];
914 // If we have any regex filters, we need to see if the message data
915 // matches any of them (otherwise we're not interested)
916 if (monitor_all_messages == 0)
917 match_str = ring.buffer[ring.tail];
920 // If we care about matching, do that comparison here
921 if (match_str != NULL) {
924 if (ignorelist_match(ignorelist, match_str) != 0)
927 DEBUG("sysevent plugin: regex filter match");
931 if (is_match == 1 && node != NULL) {
932 sysevent_dispatch_notification(NULL, &node, timestamp);
933 yajl_tree_free(node);
934 } else if (is_match == 1)
935 sysevent_dispatch_notification(ring.buffer[ring.tail], NULL, timestamp);
938 sysevent_dispatch_notification(ring.buffer[ring.tail], timestamp);
944 pthread_mutex_unlock(&sysevent_lock);
947 } /* }}} int sysevent_read */
949 static int sysevent_shutdown(void) /* {{{ */
953 DEBUG("sysevent plugin: Shutting down thread.");
954 if (stop_thread(1) < 0)
958 status = close(sock);
960 ERROR("sysevent plugin: failed to close socket %d: %d (%s)", sock, status,
970 for (int i = 0; i < buffer_length; i++) {
971 free(ring.buffer[i]);
975 free(ring.timestamp);
978 } /* }}} int sysevent_shutdown */
980 void module_register(void) {
981 plugin_register_complex_config("sysevent", sysevent_config);
982 plugin_register_init("sysevent", sysevent_init);
983 plugin_register_read("sysevent", sysevent_read);
984 plugin_register_shutdown("sysevent", sysevent_shutdown);
985 } /* void module_register */