3 * collectd - src/fhcount.c
4 * Copyright (c) 2015, Jiri Tyr <jiri.tyr at gmail.com>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
13 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
15 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
16 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 #include "configfile.h"
27 static const char *config_keys[] = {
31 static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
33 static _Bool values_absolute = 1;
34 static _Bool values_percentage = 0;
37 static int fhcount_config(const char *key, const char *value) {
40 if (strcasecmp(key, "ValuesAbsolute") == 0) {
48 } else if (strcasecmp(key, "ValuesPercentage") == 0) {
50 values_percentage = 1;
52 values_percentage = 0;
62 static void fhcount_submit(
63 const char *type, const char *type_instance, gauge_t value) {
66 value_list_t vl = VALUE_LIST_INIT;
68 values[0].gauge = value;
74 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
75 sstrncpy(vl.plugin, "fhcount", sizeof(vl.plugin));
76 sstrncpy(vl.type, type, sizeof(vl.type));
77 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
79 // Dispatch the metric
80 plugin_dispatch_values(&vl);
84 static int fhcount_read(void) {
87 gauge_t used, unused, max;
88 int prc_used, prc_unused;
90 char buffer[buffer_len];
95 fp = fopen("/proc/sys/fs/file-nr" , "r");
97 ERROR("fhcount: fopen: %s", sstrerror(errno, errbuf, sizeof(errbuf)));
100 if (fgets(buffer, buffer_len, fp) == NULL) {
101 ERROR("fhcount: fgets: %s", sstrerror(errno, errbuf, sizeof(errbuf)));
103 return(EXIT_FAILURE);
108 numfields = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
110 if (numfields != 3) {
111 ERROR("fhcount: Line doesn't contain 3 fields");
112 return(EXIT_FAILURE);
116 strtogauge(fields[0], &used);
117 strtogauge(fields[1], &unused);
118 strtogauge(fields[2], &max);
119 prc_used = (gauge_t) used/max*100;
120 prc_unused = (gauge_t) unused/max*100;
123 if (values_absolute) {
124 fhcount_submit("file_handles", "used", (gauge_t) used);
125 fhcount_submit("file_handles", "unused", (gauge_t) unused);
126 fhcount_submit("file_handles", "max", (gauge_t) max);
128 if (values_percentage) {
129 fhcount_submit("percent", "used", (gauge_t) prc_used);
130 fhcount_submit("percent", "unused", (gauge_t) prc_unused);
137 void module_register(void) {
138 plugin_register_config(
139 "fhcount", fhcount_config, config_keys, config_keys_num);
140 plugin_register_read("fhcount", fhcount_read);