Munin contributed plugins

/*

 * multicpu1sec C plugin

 */

#include <stdio.h>

#include <string.h>

#define PROC_STAT "/proc/stat"

int fail(char* msg) {

	perror(msg);

	return 1;

}

int config() {

	/* Get the number of CPU */

	FILE* f;

	if ( !(f=fopen(PROC_STAT, "r")) ) {

		return fail("cannot open " PROC_STAT);

	}

	// Starting with -1, since the first line is the "global cpu line"

	int ncpu = -1;

	while (! feof(f)) {

		char buffer[1024];

		if (fgets(buffer, 1024, f) == 0) {

			break;

		}

		if (! strncmp(buffer, "cpu", 3)) ncpu ++;

	}

	fclose(f);

	printf(

		"graph_title multicpu1sec\n"

		"graph_category system::1sec\n"

		"graph_vlabel average cpu use %\n"

		"graph_scale no\n"

		"graph_total All CPUs\n"

		"update_rate 1\n"

		"graph_data_size custom 1d, 10s for 1w, 1m for 1t, 5m for 1y\n"

	);

	int i;

	for (i = 0; i < ncpu; i++) {

		printf("cpu%d.label CPU %d\n", i, i);

		printf("cpu%d.draw %s\n", i, "AREASTACK");

		printf("cpu%d.min 0\n", i);

	}

}

int acquire() {

	printf("acquire()\n");

}

int fetch() {

	printf("fetch()\n");

}

int main(int argc, char **argv) {

	if (argc > 1) {

		char* first_arg = argv[1];

		if (! strcmp(first_arg, "config")) {

			return config();

		}

		if (! strcmp(first_arg, "acquire")) {

			return acquire();

		}

	}

	return fetch();

}