Munin contributed plugins

/*

 * Copyright (C) 2008-2013 Helmut Grohne <helmut@subdivi.de> - All rights reserved.

 *

 * This copyrighted material is made available to anyone wishing to use,

 * modify, copy, or redistribute it subject to the terms and conditions

 * of the GNU General Public License v.2 or v.3.

 */

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include "common.h"

extern char **environ;

int writeyes(void)

{

        puts("yes");

        return 0;

}

int autoconf_check_readable(const char *path)

{

        if (0 == access(path, R_OK))

                return writeyes();

        else {

                printf("no (%s is not readable, errno=%d)\n", path, errno);

                return 0;

        }

}

int getenvint(const char *name, int defvalue)

{

        const char *value;

        value = getenv(name);

        if (value == NULL)

                return defvalue;

        return atoi(value);

}

static

                                    /*@null@ */

 /*@observer@ */

const char *getenv_composed(const char *name1, const char *name2)

{

        char **p;

        size_t len1 = strlen(name1), len2 = strlen(name2);

        for (p = environ; *p; ++p) {

                if (0 == strncmp(*p, name1, len1) &&

                    0 == strncmp(len1 + *p, name2, len2) &&

                    (*p)[len1 + len2] == '=')

                        return len1 + len2 + 1 + *p;

        }

        return NULL;

}

void print_warning(const char *name)

{

        const char *p;

        p = getenv_composed(name, "_warning");

        if (p == NULL)

                p = getenv("warning");

        if (p == NULL)

                return;

        printf("%s.warning %s\n", name, p);

}

void print_critical(const char *name)

{

        const char *p;

        p = getenv_composed(name, "_critical");

        if (p == NULL)

                p = getenv("critical");

        if (p == NULL)

                return;

        printf("%s.critical %s\n", name, p);

}

void print_warncrit(const char *name)

{

        print_warning(name);

        print_critical(name);

}

int fail(const char *message)

{

        fputs(message, stderr);

        fputc('\n', stderr);

        return 1;

}