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();

}