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-rw-r--r--collectors/plugins.d/plugins_d.c696
1 files changed, 696 insertions, 0 deletions
diff --git a/collectors/plugins.d/plugins_d.c b/collectors/plugins.d/plugins_d.c
new file mode 100644
index 0000000..465ecd7
--- /dev/null
+++ b/collectors/plugins.d/plugins_d.c
@@ -0,0 +1,696 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "plugins_d.h"
+
+char *plugin_directories[PLUGINSD_MAX_DIRECTORIES] = { NULL };
+char *netdata_configured_plugins_dir_base;
+
+struct plugind *pluginsd_root = NULL;
+
+static inline int pluginsd_space(char c) {
+ switch(c) {
+ case ' ':
+ case '\t':
+ case '\r':
+ case '\n':
+ case '=':
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+inline int config_isspace(char c) {
+ switch(c) {
+ case ' ':
+ case '\t':
+ case '\r':
+ case '\n':
+ case ',':
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+// split a text into words, respecting quotes
+inline int quoted_strings_splitter(char *str, char **words, int max_words, int (*custom_isspace)(char)) {
+ char *s = str, quote = 0;
+ int i = 0, j;
+
+ // skip all white space
+ while(unlikely(custom_isspace(*s))) s++;
+
+ // check for quote
+ if(unlikely(*s == '\'' || *s == '"')) {
+ quote = *s; // remember the quote
+ s++; // skip the quote
+ }
+
+ // store the first word
+ words[i++] = s;
+
+ // while we have something
+ while(likely(*s)) {
+ // if it is escape
+ if(unlikely(*s == '\\' && s[1])) {
+ s += 2;
+ continue;
+ }
+
+ // if it is quote
+ else if(unlikely(*s == quote)) {
+ quote = 0;
+ *s = ' ';
+ continue;
+ }
+
+ // if it is a space
+ else if(unlikely(quote == 0 && custom_isspace(*s))) {
+
+ // terminate the word
+ *s++ = '\0';
+
+ // skip all white space
+ while(likely(custom_isspace(*s))) s++;
+
+ // check for quote
+ if(unlikely(*s == '\'' || *s == '"')) {
+ quote = *s; // remember the quote
+ s++; // skip the quote
+ }
+
+ // if we reached the end, stop
+ if(unlikely(!*s)) break;
+
+ // store the next word
+ if(likely(i < max_words)) words[i++] = s;
+ else break;
+ }
+
+ // anything else
+ else s++;
+ }
+
+ // terminate the words
+ j = i;
+ while(likely(j < max_words)) words[j++] = NULL;
+
+ return i;
+}
+
+inline int pluginsd_split_words(char *str, char **words, int max_words) {
+ return quoted_strings_splitter(str, words, max_words, pluginsd_space);
+}
+
+inline size_t pluginsd_process(RRDHOST *host, struct plugind *cd, FILE *fp, int trust_durations) {
+ int enabled = cd->enabled;
+
+ if(!fp || !enabled) {
+ cd->enabled = 0;
+ return 0;
+ }
+
+ size_t count = 0;
+
+ char line[PLUGINSD_LINE_MAX + 1];
+
+ char *words[PLUGINSD_MAX_WORDS] = { NULL };
+ uint32_t BEGIN_HASH = simple_hash(PLUGINSD_KEYWORD_BEGIN);
+ uint32_t END_HASH = simple_hash(PLUGINSD_KEYWORD_END);
+ uint32_t FLUSH_HASH = simple_hash(PLUGINSD_KEYWORD_FLUSH);
+ uint32_t CHART_HASH = simple_hash(PLUGINSD_KEYWORD_CHART);
+ uint32_t DIMENSION_HASH = simple_hash(PLUGINSD_KEYWORD_DIMENSION);
+ uint32_t DISABLE_HASH = simple_hash(PLUGINSD_KEYWORD_DISABLE);
+ uint32_t VARIABLE_HASH = simple_hash(PLUGINSD_KEYWORD_VARIABLE);
+
+ RRDSET *st = NULL;
+ uint32_t hash;
+
+ errno = 0;
+ clearerr(fp);
+
+ if(unlikely(fileno(fp) == -1)) {
+ error("file descriptor given is not a valid stream");
+ goto cleanup;
+ }
+
+ while(!ferror(fp)) {
+ if(unlikely(netdata_exit)) break;
+
+ char *r = fgets(line, PLUGINSD_LINE_MAX, fp);
+ if(unlikely(!r)) {
+ error("read failed");
+ break;
+ }
+
+ if(unlikely(netdata_exit)) break;
+
+ line[PLUGINSD_LINE_MAX] = '\0';
+
+ int w = pluginsd_split_words(line, words, PLUGINSD_MAX_WORDS);
+ char *s = words[0];
+ if(unlikely(!s || !*s || !w)) {
+ continue;
+ }
+
+ // debug(D_PLUGINSD, "PLUGINSD: words 0='%s' 1='%s' 2='%s' 3='%s' 4='%s' 5='%s' 6='%s' 7='%s' 8='%s' 9='%s'", words[0], words[1], words[2], words[3], words[4], words[5], words[6], words[7], words[8], words[9]);
+
+ if(likely(!simple_hash_strcmp(s, "SET", &hash))) {
+ char *dimension = words[1];
+ char *value = words[2];
+
+ if(unlikely(!dimension || !*dimension)) {
+ error("requested a SET on chart '%s' of host '%s', without a dimension. Disabling it.", st->id, host->hostname);
+ enabled = 0;
+ break;
+ }
+
+ if(unlikely(!value || !*value)) value = NULL;
+
+ if(unlikely(!st)) {
+ error("requested a SET on dimension %s with value %s on host '%s', without a BEGIN. Disabling it.", dimension, value?value:"<nothing>", host->hostname);
+ enabled = 0;
+ break;
+ }
+
+ if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
+ debug(D_PLUGINSD, "is setting dimension %s/%s to %s", st->id, dimension, value?value:"<nothing>");
+
+ if(value) {
+ RRDDIM *rd = rrddim_find(st, dimension);
+ if(unlikely(!rd)) {
+ error("requested a SET to dimension with id '%s' on stats '%s' (%s) on host '%s', which does not exist. Disabling it.", dimension, st->name, st->id, st->rrdhost->hostname);
+ enabled = 0;
+ break;
+ }
+ else
+ rrddim_set_by_pointer(st, rd, strtoll(value, NULL, 0));
+ }
+ }
+ else if(likely(hash == BEGIN_HASH && !strcmp(s, PLUGINSD_KEYWORD_BEGIN))) {
+ char *id = words[1];
+ char *microseconds_txt = words[2];
+
+ if(unlikely(!id)) {
+ error("requested a BEGIN without a chart id for host '%s'. Disabling it.", host->hostname);
+ enabled = 0;
+ break;
+ }
+
+ st = rrdset_find(host, id);
+ if(unlikely(!st)) {
+ error("requested a BEGIN on chart '%s', which does not exist on host '%s'. Disabling it.", id, host->hostname);
+ enabled = 0;
+ break;
+ }
+
+ if(likely(st->counter_done)) {
+ usec_t microseconds = 0;
+ if(microseconds_txt && *microseconds_txt) microseconds = str2ull(microseconds_txt);
+
+ if(likely(microseconds)) {
+ if(trust_durations)
+ rrdset_next_usec_unfiltered(st, microseconds);
+ else
+ rrdset_next_usec(st, microseconds);
+ }
+ else rrdset_next(st);
+ }
+ }
+ else if(likely(hash == END_HASH && !strcmp(s, PLUGINSD_KEYWORD_END))) {
+ if(unlikely(!st)) {
+ error("requested an END, without a BEGIN on host '%s'. Disabling it.", host->hostname);
+ enabled = 0;
+ break;
+ }
+
+ if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
+ debug(D_PLUGINSD, "requested an END on chart %s", st->id);
+
+ rrdset_done(st);
+ st = NULL;
+
+ count++;
+ }
+ else if(likely(hash == CHART_HASH && !strcmp(s, PLUGINSD_KEYWORD_CHART))) {
+ st = NULL;
+
+ char *type = words[1];
+ char *name = words[2];
+ char *title = words[3];
+ char *units = words[4];
+ char *family = words[5];
+ char *context = words[6];
+ char *chart = words[7];
+ char *priority_s = words[8];
+ char *update_every_s = words[9];
+ char *options = words[10];
+ char *plugin = words[11];
+ char *module = words[12];
+
+ // parse the id from type
+ char *id = NULL;
+ if(likely(type && (id = strchr(type, '.')))) {
+ *id = '\0';
+ id++;
+ }
+
+ // make sure we have the required variables
+ if(unlikely(!type || !*type || !id || !*id)) {
+ error("requested a CHART, without a type.id, on host '%s'. Disabling it.", host->hostname);
+ enabled = 0;
+ break;
+ }
+
+ // parse the name, and make sure it does not include 'type.'
+ if(unlikely(name && *name)) {
+ // when data are coming from slaves
+ // name will be type.name
+ // so we have to remove 'type.' from name too
+ size_t len = strlen(type);
+ if(strncmp(type, name, len) == 0 && name[len] == '.')
+ name = &name[len + 1];
+
+ // if the name is the same with the id,
+ // or is just 'NULL', clear it.
+ if(unlikely(strcmp(name, id) == 0 || strcasecmp(name, "NULL") == 0 || strcasecmp(name, "(NULL)") == 0))
+ name = NULL;
+ }
+
+ int priority = 1000;
+ if(likely(priority_s && *priority_s)) priority = str2i(priority_s);
+
+ int update_every = cd->update_every;
+ if(likely(update_every_s && *update_every_s)) update_every = str2i(update_every_s);
+ if(unlikely(!update_every)) update_every = cd->update_every;
+
+ RRDSET_TYPE chart_type = RRDSET_TYPE_LINE;
+ if(unlikely(chart)) chart_type = rrdset_type_id(chart);
+
+ if(unlikely(name && !*name)) name = NULL;
+ if(unlikely(family && !*family)) family = NULL;
+ if(unlikely(context && !*context)) context = NULL;
+ if(unlikely(!title)) title = "";
+ if(unlikely(!units)) units = "unknown";
+
+ debug(D_PLUGINSD, "creating chart type='%s', id='%s', name='%s', family='%s', context='%s', chart='%s', priority=%d, update_every=%d"
+ , type, id
+ , name?name:""
+ , family?family:""
+ , context?context:""
+ , rrdset_type_name(chart_type)
+ , priority
+ , update_every
+ );
+
+ st = rrdset_create(
+ host
+ , type
+ , id
+ , name
+ , family
+ , context
+ , title
+ , units
+ , (plugin && *plugin)?plugin:cd->filename
+ , module
+ , priority
+ , update_every
+ , chart_type
+ );
+
+ if(options && *options) {
+ if(strstr(options, "obsolete"))
+ rrdset_is_obsolete(st);
+ else
+ rrdset_isnot_obsolete(st);
+
+ if(strstr(options, "detail"))
+ rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
+ else
+ rrdset_flag_clear(st, RRDSET_FLAG_DETAIL);
+
+ if(strstr(options, "hidden"))
+ rrdset_flag_set(st, RRDSET_FLAG_HIDDEN);
+ else
+ rrdset_flag_clear(st, RRDSET_FLAG_HIDDEN);
+
+ if(strstr(options, "store_first"))
+ rrdset_flag_set(st, RRDSET_FLAG_STORE_FIRST);
+ else
+ rrdset_flag_clear(st, RRDSET_FLAG_STORE_FIRST);
+ }
+ else {
+ rrdset_isnot_obsolete(st);
+ rrdset_flag_clear(st, RRDSET_FLAG_DETAIL);
+ rrdset_flag_clear(st, RRDSET_FLAG_STORE_FIRST);
+ }
+ }
+ else if(likely(hash == DIMENSION_HASH && !strcmp(s, PLUGINSD_KEYWORD_DIMENSION))) {
+ char *id = words[1];
+ char *name = words[2];
+ char *algorithm = words[3];
+ char *multiplier_s = words[4];
+ char *divisor_s = words[5];
+ char *options = words[6];
+
+ if(unlikely(!id || !*id)) {
+ error("requested a DIMENSION, without an id, host '%s' and chart '%s'. Disabling it.", host->hostname, st?st->id:"UNSET");
+ enabled = 0;
+ break;
+ }
+
+ if(unlikely(!st)) {
+ error("requested a DIMENSION, without a CHART, on host '%s'. Disabling it.", host->hostname);
+ enabled = 0;
+ break;
+ }
+
+ long multiplier = 1;
+ if(multiplier_s && *multiplier_s) multiplier = strtol(multiplier_s, NULL, 0);
+ if(unlikely(!multiplier)) multiplier = 1;
+
+ long divisor = 1;
+ if(likely(divisor_s && *divisor_s)) divisor = strtol(divisor_s, NULL, 0);
+ if(unlikely(!divisor)) divisor = 1;
+
+ if(unlikely(!algorithm || !*algorithm)) algorithm = "absolute";
+
+ if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_DEBUG)))
+ debug(D_PLUGINSD, "creating dimension in chart %s, id='%s', name='%s', algorithm='%s', multiplier=%ld, divisor=%ld, hidden='%s'"
+ , st->id
+ , id
+ , name?name:""
+ , rrd_algorithm_name(rrd_algorithm_id(algorithm))
+ , multiplier
+ , divisor
+ , options?options:""
+ );
+
+ RRDDIM *rd = rrddim_add(st, id, name, multiplier, divisor, rrd_algorithm_id(algorithm));
+ rrddim_flag_clear(rd, RRDDIM_FLAG_HIDDEN);
+ rrddim_flag_clear(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS);
+ if(options && *options) {
+ if(strstr(options, "hidden") != NULL) rrddim_flag_set(rd, RRDDIM_FLAG_HIDDEN);
+ if(strstr(options, "noreset") != NULL) rrddim_flag_set(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS);
+ if(strstr(options, "nooverflow") != NULL) rrddim_flag_set(rd, RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS);
+ }
+ }
+ else if(likely(hash == VARIABLE_HASH && !strcmp(s, PLUGINSD_KEYWORD_VARIABLE))) {
+ char *name = words[1];
+ char *value = words[2];
+ int global = (st)?0:1;
+
+ if(name && *name) {
+ if((strcmp(name, "GLOBAL") == 0 || strcmp(name, "HOST") == 0)) {
+ global = 1;
+ name = words[2];
+ value = words[3];
+ }
+ else if((strcmp(name, "LOCAL") == 0 || strcmp(name, "CHART") == 0)) {
+ global = 0;
+ name = words[2];
+ value = words[3];
+ }
+ }
+
+ if(unlikely(!name || !*name)) {
+ error("requested a VARIABLE on host '%s', without a variable name. Disabling it.", host->hostname);
+ enabled = 0;
+ break;
+ }
+
+ if(unlikely(!value || !*value))
+ value = NULL;
+
+ if(value) {
+ char *endptr = NULL;
+ calculated_number v = (calculated_number)str2ld(value, &endptr);
+
+ if(unlikely(endptr && *endptr)) {
+ if(endptr == value)
+ error("the value '%s' of VARIABLE '%s' on host '%s' cannot be parsed as a number", value, name, host->hostname);
+ else
+ error("the value '%s' of VARIABLE '%s' on host '%s' has leftovers: '%s'", value, name, host->hostname, endptr);
+ }
+
+ if(global) {
+ RRDVAR *rv = rrdvar_custom_host_variable_create(host, name);
+ if (rv) rrdvar_custom_host_variable_set(host, rv, v);
+ else error("cannot find/create HOST VARIABLE '%s' on host '%s'", name, host->hostname);
+ }
+ else if(st) {
+ RRDSETVAR *rs = rrdsetvar_custom_chart_variable_create(st, name);
+ if (rs) rrdsetvar_custom_chart_variable_set(rs, v);
+ else error("cannot find/create CHART VARIABLE '%s' on host '%s', chart '%s'", name, host->hostname, st->id);
+ }
+ else
+ error("cannot find/create CHART VARIABLE '%s' on host '%s' without a chart", name, host->hostname);
+ }
+ else
+ error("cannot set %s VARIABLE '%s' on host '%s' to an empty value", (global)?"HOST":"CHART", name, host->hostname);
+ }
+ else if(likely(hash == FLUSH_HASH && !strcmp(s, PLUGINSD_KEYWORD_FLUSH))) {
+ debug(D_PLUGINSD, "requested a FLUSH");
+ st = NULL;
+ }
+ else if(unlikely(hash == DISABLE_HASH && !strcmp(s, PLUGINSD_KEYWORD_DISABLE))) {
+ info("called DISABLE. Disabling it.");
+ enabled = 0;
+ break;
+ }
+ else {
+ error("sent command '%s' which is not known by netdata, for host '%s'. Disabling it.", s, host->hostname);
+ enabled = 0;
+ break;
+ }
+ }
+
+cleanup:
+ cd->enabled = enabled;
+
+ if(likely(count)) {
+ cd->successful_collections += count;
+ cd->serial_failures = 0;
+ }
+ else
+ cd->serial_failures++;
+
+ return count;
+}
+
+static void pluginsd_worker_thread_cleanup(void *arg) {
+ struct plugind *cd = (struct plugind *)arg;
+
+ if(cd->enabled && !cd->obsolete) {
+ cd->obsolete = 1;
+
+ info("data collection thread exiting");
+
+ if (cd->pid) {
+ siginfo_t info;
+ info("killing child process pid %d", cd->pid);
+ if (killpid(cd->pid, SIGTERM) != -1) {
+ info("waiting for child process pid %d to exit...", cd->pid);
+ waitid(P_PID, (id_t) cd->pid, &info, WEXITED);
+ }
+ cd->pid = 0;
+ }
+ }
+}
+
+void *pluginsd_worker_thread(void *arg) {
+ netdata_thread_cleanup_push(pluginsd_worker_thread_cleanup, arg);
+
+ struct plugind *cd = (struct plugind *)arg;
+
+ cd->obsolete = 0;
+ size_t count = 0;
+
+ while(!netdata_exit) {
+ FILE *fp = mypopen(cd->cmd, &cd->pid);
+ if(unlikely(!fp)) {
+ error("Cannot popen(\"%s\", \"r\").", cd->cmd);
+ break;
+ }
+
+ info("connected to '%s' running on pid %d", cd->fullfilename, cd->pid);
+ count = pluginsd_process(localhost, cd, fp, 0);
+ error("'%s' (pid %d) disconnected after %zu successful data collections (ENDs).", cd->fullfilename, cd->pid, count);
+ killpid(cd->pid, SIGTERM);
+
+ // get the return code
+ int code = mypclose(fp, cd->pid);
+
+ if(code != 0) {
+ // the plugin reports failure
+
+ if(likely(!cd->successful_collections)) {
+ // nothing collected - disable it
+ error("'%s' (pid %d) exited with error code %d. Disabling it.", cd->fullfilename, cd->pid, code);
+ cd->enabled = 0;
+ }
+ else {
+ // we have collected something
+
+ if(likely(cd->serial_failures <= 10)) {
+ error("'%s' (pid %d) exited with error code %d, but has given useful output in the past (%zu times). %s", cd->fullfilename, cd->pid, code, cd->successful_collections, cd->enabled?"Waiting a bit before starting it again.":"Will not start it again - it is disabled.");
+ sleep((unsigned int) (cd->update_every * 10));
+ }
+ else {
+ error("'%s' (pid %d) exited with error code %d, but has given useful output in the past (%zu times). We tried %zu times to restart it, but it failed to generate data. Disabling it.", cd->fullfilename, cd->pid, code, cd->successful_collections, cd->serial_failures);
+ cd->enabled = 0;
+ }
+ }
+ }
+ else {
+ // the plugin reports success
+
+ if(unlikely(!cd->successful_collections)) {
+ // we have collected nothing so far
+
+ if(likely(cd->serial_failures <= 10)) {
+ error("'%s' (pid %d) does not generate useful output but it reports success (exits with 0). %s.", cd->fullfilename, cd->pid, cd->enabled?"Waiting a bit before starting it again.":"Will not start it again - it is now disabled.");
+ sleep((unsigned int) (cd->update_every * 10));
+ }
+ else {
+ error("'%s' (pid %d) does not generate useful output, although it reports success (exits with 0), but we have tried %zu times to collect something. Disabling it.", cd->fullfilename, cd->pid, cd->serial_failures);
+ cd->enabled = 0;
+ }
+ }
+ else
+ sleep((unsigned int) cd->update_every);
+ }
+ cd->pid = 0;
+
+ if(unlikely(!cd->enabled)) break;
+ }
+
+ netdata_thread_cleanup_pop(1);
+ return NULL;
+}
+
+static void pluginsd_main_cleanup(void *data) {
+ struct netdata_static_thread *static_thread = (struct netdata_static_thread *)data;
+ static_thread->enabled = NETDATA_MAIN_THREAD_EXITING;
+ info("cleaning up...");
+
+ struct plugind *cd;
+ for (cd = pluginsd_root; cd; cd = cd->next) {
+ if (cd->enabled && !cd->obsolete) {
+ info("stopping plugin thread: %s", cd->id);
+ netdata_thread_cancel(cd->thread);
+ }
+ }
+
+ info("cleanup completed.");
+ static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
+}
+
+void *pluginsd_main(void *ptr) {
+ netdata_thread_cleanup_push(pluginsd_main_cleanup, ptr);
+
+ int automatic_run = config_get_boolean(CONFIG_SECTION_PLUGINS, "enable running new plugins", 1);
+ int scan_frequency = (int) config_get_number(CONFIG_SECTION_PLUGINS, "check for new plugins every", 60);
+ if(scan_frequency < 1) scan_frequency = 1;
+
+ // store the errno for each plugins directory
+ // so that we don't log broken directories on each loop
+ int directory_errors[PLUGINSD_MAX_DIRECTORIES] = { 0 };
+
+ while(!netdata_exit) {
+ int idx;
+ const char *directory_name;
+
+ for( idx = 0; idx < PLUGINSD_MAX_DIRECTORIES && (directory_name = plugin_directories[idx]) ; idx++ ) {
+ if(unlikely(netdata_exit)) break;
+
+ errno = 0;
+ DIR *dir = opendir(directory_name);
+ if(unlikely(!dir)) {
+ if(directory_errors[idx] != errno) {
+ directory_errors[idx] = errno;
+ error("cannot open plugins directory '%s'", directory_name);
+ }
+ continue;
+ }
+
+ struct dirent *file = NULL;
+ while(likely((file = readdir(dir)))) {
+ if(unlikely(netdata_exit)) break;
+
+ debug(D_PLUGINSD, "examining file '%s'", file->d_name);
+
+ if(unlikely(strcmp(file->d_name, ".") == 0 || strcmp(file->d_name, "..") == 0)) continue;
+
+ int len = (int) strlen(file->d_name);
+ if(unlikely(len <= (int)PLUGINSD_FILE_SUFFIX_LEN)) continue;
+ if(unlikely(strcmp(PLUGINSD_FILE_SUFFIX, &file->d_name[len - (int)PLUGINSD_FILE_SUFFIX_LEN]) != 0)) {
+ debug(D_PLUGINSD, "file '%s' does not end in '%s'", file->d_name, PLUGINSD_FILE_SUFFIX);
+ continue;
+ }
+
+ char pluginname[CONFIG_MAX_NAME + 1];
+ snprintfz(pluginname, CONFIG_MAX_NAME, "%.*s", (int)(len - PLUGINSD_FILE_SUFFIX_LEN), file->d_name);
+ int enabled = config_get_boolean(CONFIG_SECTION_PLUGINS, pluginname, automatic_run);
+
+ if(unlikely(!enabled)) {
+ debug(D_PLUGINSD, "plugin '%s' is not enabled", file->d_name);
+ continue;
+ }
+
+ // check if it runs already
+ struct plugind *cd;
+ for(cd = pluginsd_root ; cd ; cd = cd->next)
+ if(unlikely(strcmp(cd->filename, file->d_name) == 0)) break;
+
+ if(likely(cd && !cd->obsolete)) {
+ debug(D_PLUGINSD, "plugin '%s' is already running", cd->filename);
+ continue;
+ }
+
+ // it is not running
+ // allocate a new one, or use the obsolete one
+ if(unlikely(!cd)) {
+ cd = callocz(sizeof(struct plugind), 1);
+
+ snprintfz(cd->id, CONFIG_MAX_NAME, "plugin:%s", pluginname);
+
+ strncpyz(cd->filename, file->d_name, FILENAME_MAX);
+ snprintfz(cd->fullfilename, FILENAME_MAX, "%s/%s", directory_name, cd->filename);
+
+ cd->enabled = enabled;
+ cd->update_every = (int) config_get_number(cd->id, "update every", localhost->rrd_update_every);
+ cd->started_t = now_realtime_sec();
+
+ char *def = "";
+ snprintfz(cd->cmd, PLUGINSD_CMD_MAX, "exec %s %d %s", cd->fullfilename, cd->update_every, config_get(cd->id, "command options", def));
+
+ // link it
+ if(likely(pluginsd_root)) cd->next = pluginsd_root;
+ pluginsd_root = cd;
+
+ // it is not currently running
+ cd->obsolete = 1;
+
+ if(cd->enabled) {
+ char tag[NETDATA_THREAD_TAG_MAX + 1];
+ snprintfz(tag, NETDATA_THREAD_TAG_MAX, "PLUGINSD[%s]", pluginname);
+ // spawn a new thread for it
+ netdata_thread_create(&cd->thread, tag, NETDATA_THREAD_OPTION_DEFAULT, pluginsd_worker_thread, cd);
+ }
+ }
+ }
+
+ closedir(dir);
+ }
+
+ sleep((unsigned int) scan_frequency);
+ }
+
+ netdata_thread_cleanup_pop(1);
+ return NULL;
+}