+++ /dev/null
-/**
- * collectd - src/utils_match.c
- * Copyright (C) 2008-2014 Florian octo Forster
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Florian octo Forster <octo at collectd.org>
- **/
-
-#include "collectd.h"
-
-#include "common.h"
-#include "plugin.h"
-
-#include "utils_match.h"
-
-#include <regex.h>
-
-#define UTILS_MATCH_FLAGS_EXCLUDE_REGEX 0x02
-#define UTILS_MATCH_FLAGS_REGEX 0x04
-
-struct cu_match_s {
- regex_t regex;
- regex_t excluderegex;
- int flags;
-
- int (*callback)(const char *str, char *const *matches, size_t matches_num,
- void *user_data);
- void *user_data;
- void (*free)(void *user_data);
-};
-
-/*
- * Private functions
- */
-static char *match_substr(const char *str, int begin, int end) {
- char *ret;
- size_t ret_len;
-
- if ((begin < 0) || (end < 0) || (begin >= end))
- return (NULL);
- if ((size_t)end > (strlen(str) + 1)) {
- ERROR("utils_match: match_substr: `end' points after end of string.");
- return (NULL);
- }
-
- ret_len = end - begin;
- ret = malloc(ret_len + 1);
- if (ret == NULL) {
- ERROR("utils_match: match_substr: malloc failed.");
- return (NULL);
- }
-
- sstrncpy(ret, str + begin, ret_len + 1);
- return (ret);
-} /* char *match_substr */
-
-static int default_callback(const char __attribute__((unused)) * str,
- char *const *matches, size_t matches_num,
- void *user_data) {
- cu_match_value_t *data = (cu_match_value_t *)user_data;
-
- if (data->ds_type & UTILS_MATCH_DS_TYPE_GAUGE) {
- gauge_t value;
- char *endptr = NULL;
-
- if (data->ds_type & UTILS_MATCH_CF_GAUGE_INC) {
- data->value.gauge = isnan(data->value.gauge) ? 1 : data->value.gauge + 1;
- data->values_num++;
- return (0);
- }
-
- if (matches_num < 2)
- return (-1);
-
- value = (gauge_t)strtod(matches[1], &endptr);
- if (matches[1] == endptr)
- return (-1);
-
- if (data->ds_type & UTILS_MATCH_CF_GAUGE_DIST) {
- latency_counter_add(data->latency, DOUBLE_TO_CDTIME_T(value));
- data->values_num++;
- return (0);
- }
-
- if ((data->values_num == 0) ||
- (data->ds_type & UTILS_MATCH_CF_GAUGE_LAST) ||
- (data->ds_type & UTILS_MATCH_CF_GAUGE_PERSIST)) {
- data->value.gauge = value;
- } else if (data->ds_type & UTILS_MATCH_CF_GAUGE_AVERAGE) {
- double f = ((double)data->values_num) / ((double)(data->values_num + 1));
- data->value.gauge = (data->value.gauge * f) + (value * (1.0 - f));
- } else if (data->ds_type & UTILS_MATCH_CF_GAUGE_MIN) {
- if (data->value.gauge > value)
- data->value.gauge = value;
- } else if (data->ds_type & UTILS_MATCH_CF_GAUGE_MAX) {
- if (data->value.gauge < value)
- data->value.gauge = value;
- } else if (data->ds_type & UTILS_MATCH_CF_GAUGE_ADD) {
- data->value.gauge += value;
- } else {
- ERROR("utils_match: default_callback: obj->ds_type is invalid!");
- return (-1);
- }
-
- data->values_num++;
- } else if (data->ds_type & UTILS_MATCH_DS_TYPE_COUNTER) {
- counter_t value;
- char *endptr = NULL;
-
- if (data->ds_type & UTILS_MATCH_CF_COUNTER_INC) {
- data->value.counter++;
- data->values_num++;
- return (0);
- }
-
- if (matches_num < 2)
- return (-1);
-
- value = (counter_t)strtoull(matches[1], &endptr, 0);
- if (matches[1] == endptr)
- return (-1);
-
- if (data->ds_type & UTILS_MATCH_CF_COUNTER_SET)
- data->value.counter = value;
- else if (data->ds_type & UTILS_MATCH_CF_COUNTER_ADD)
- data->value.counter += value;
- else {
- ERROR("utils_match: default_callback: obj->ds_type is invalid!");
- return (-1);
- }
-
- data->values_num++;
- } else if (data->ds_type & UTILS_MATCH_DS_TYPE_DERIVE) {
- derive_t value;
- char *endptr = NULL;
-
- if (data->ds_type & UTILS_MATCH_CF_DERIVE_INC) {
- data->value.derive++;
- data->values_num++;
- return (0);
- }
-
- if (matches_num < 2)
- return (-1);
-
- value = (derive_t)strtoll(matches[1], &endptr, 0);
- if (matches[1] == endptr)
- return (-1);
-
- if (data->ds_type & UTILS_MATCH_CF_DERIVE_SET)
- data->value.derive = value;
- else if (data->ds_type & UTILS_MATCH_CF_DERIVE_ADD)
- data->value.derive += value;
- else {
- ERROR("utils_match: default_callback: obj->ds_type is invalid!");
- return (-1);
- }
-
- data->values_num++;
- } else if (data->ds_type & UTILS_MATCH_DS_TYPE_ABSOLUTE) {
- absolute_t value;
- char *endptr = NULL;
-
- if (matches_num < 2)
- return (-1);
-
- value = (absolute_t)strtoull(matches[1], &endptr, 0);
- if (matches[1] == endptr)
- return (-1);
-
- if (data->ds_type & UTILS_MATCH_CF_ABSOLUTE_SET)
- data->value.absolute = value;
- else {
- ERROR("utils_match: default_callback: obj->ds_type is invalid!");
- return (-1);
- }
-
- data->values_num++;
- } else {
- ERROR("utils_match: default_callback: obj->ds_type is invalid!");
- return (-1);
- }
-
- return (0);
-} /* int default_callback */
-
-static void match_simple_free(void *data) {
- cu_match_value_t *user_data = (cu_match_value_t *)data;
- if (user_data->latency)
- latency_counter_destroy(user_data->latency);
-
- free(data);
-} /* void match_simple_free */
-
-/*
- * Public functions
- */
-cu_match_t *
-match_create_callback(const char *regex, const char *excluderegex,
- int (*callback)(const char *str, char *const *matches,
- size_t matches_num, void *user_data),
- void *user_data,
- void (*free_user_data)(void *user_data)) {
- cu_match_t *obj;
- int status;
-
- DEBUG("utils_match: match_create_callback: regex = %s, excluderegex = %s",
- regex, excluderegex);
-
- obj = calloc(1, sizeof(*obj));
- if (obj == NULL)
- return (NULL);
-
- status = regcomp(&obj->regex, regex, REG_EXTENDED | REG_NEWLINE);
- if (status != 0) {
- ERROR("Compiling the regular expression \"%s\" failed.", regex);
- sfree(obj);
- return (NULL);
- }
- obj->flags |= UTILS_MATCH_FLAGS_REGEX;
-
- if (excluderegex && strcmp(excluderegex, "") != 0) {
- status = regcomp(&obj->excluderegex, excluderegex, REG_EXTENDED);
- if (status != 0) {
- ERROR("Compiling the excluding regular expression \"%s\" failed.",
- excluderegex);
- sfree(obj);
- return (NULL);
- }
- obj->flags |= UTILS_MATCH_FLAGS_EXCLUDE_REGEX;
- }
-
- obj->callback = callback;
- obj->user_data = user_data;
- obj->free = free_user_data;
-
- return (obj);
-} /* cu_match_t *match_create_callback */
-
-cu_match_t *match_create_simple(const char *regex, const char *excluderegex,
- int match_ds_type) {
- cu_match_value_t *user_data;
- cu_match_t *obj;
-
- user_data = calloc(1, sizeof(*user_data));
- if (user_data == NULL)
- return (NULL);
- user_data->ds_type = match_ds_type;
-
- if ((match_ds_type & UTILS_MATCH_DS_TYPE_GAUGE) &&
- (match_ds_type & UTILS_MATCH_CF_GAUGE_DIST)) {
- user_data->latency = latency_counter_create();
- if (user_data->latency == NULL) {
- ERROR("match_create_simple(): latency_counter_create() failed.");
- free(user_data);
- return (NULL);
- }
- }
-
- obj = match_create_callback(regex, excluderegex, default_callback, user_data,
- match_simple_free);
- if (obj == NULL) {
- if (user_data->latency)
- latency_counter_destroy(user_data->latency);
-
- sfree(user_data);
- return (NULL);
- }
- return (obj);
-} /* cu_match_t *match_create_simple */
-
-void match_value_reset(cu_match_value_t *mv) {
- if (mv == NULL)
- return;
-
- /* Reset GAUGE metrics only and except GAUGE_PERSIST. */
- if ((mv->ds_type & UTILS_MATCH_DS_TYPE_GAUGE) &&
- !(mv->ds_type & UTILS_MATCH_CF_GAUGE_PERSIST)) {
- mv->value.gauge = NAN;
- mv->values_num = 0;
- }
-} /* }}} void match_value_reset */
-
-void match_destroy(cu_match_t *obj) {
- if (obj == NULL)
- return;
-
- if (obj->flags & UTILS_MATCH_FLAGS_REGEX)
- regfree(&obj->regex);
- if (obj->flags & UTILS_MATCH_FLAGS_EXCLUDE_REGEX)
- regfree(&obj->excluderegex);
- if ((obj->user_data != NULL) && (obj->free != NULL))
- (*obj->free)(obj->user_data);
-
- sfree(obj);
-} /* void match_destroy */
-
-int match_apply(cu_match_t *obj, const char *str) {
- int status;
- regmatch_t re_match[32];
- char *matches[32] = {0};
- size_t matches_num;
-
- if ((obj == NULL) || (str == NULL))
- return (-1);
-
- if (obj->flags & UTILS_MATCH_FLAGS_EXCLUDE_REGEX) {
- status =
- regexec(&obj->excluderegex, str, STATIC_ARRAY_SIZE(re_match), re_match,
- /* eflags = */ 0);
- /* Regex did match, so exclude this line */
- if (status == 0) {
- DEBUG("ExludeRegex matched, don't count that line\n");
- return (0);
- }
- }
-
- status = regexec(&obj->regex, str, STATIC_ARRAY_SIZE(re_match), re_match,
- /* eflags = */ 0);
-
- /* Regex did not match */
- if (status != 0)
- return (0);
-
- for (matches_num = 0; matches_num < STATIC_ARRAY_SIZE(matches);
- matches_num++) {
- if ((re_match[matches_num].rm_so < 0) || (re_match[matches_num].rm_eo < 0))
- break;
-
- matches[matches_num] = match_substr(str, re_match[matches_num].rm_so,
- re_match[matches_num].rm_eo);
- if (matches[matches_num] == NULL) {
- status = -1;
- break;
- }
- }
-
- if (status != 0) {
- ERROR("utils_match: match_apply: match_substr failed.");
- } else {
- status = obj->callback(str, matches, matches_num, obj->user_data);
- if (status != 0) {
- ERROR("utils_match: match_apply: callback failed.");
- }
- }
-
- for (size_t i = 0; i < matches_num; i++) {
- sfree(matches[i]);
- }
-
- return (status);
-} /* int match_apply */
-
-void *match_get_user_data(cu_match_t *obj) {
- if (obj == NULL)
- return (NULL);
- return (obj->user_data);
-} /* void *match_get_user_data */
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