common

/*
 * 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;
}