/*
 * Copyright 2008, Axel Dörfler, axeld@pinc-software.de.
 * Distributed under the terms of the MIT License.
 */


#include <stdio.h>
#include <stdlib.h>


int gTestNr;


void
set_env()
{
        gTestNr++;
        printf("Test %d...\n", gTestNr);

        if (setenv("TEST_VARIABLE", "42", true) != 0)
                fprintf(stderr, "Test %d: setting variable failed!\n", gTestNr);
}


void
test_env()
{
        if (getenv("TEST_VARIABLE") != NULL)
                fprintf(stderr, "Test %d: not cleared!\n", gTestNr);
        if (setenv("OTHER_VARIABLE", "test", true) != 0)
                fprintf(stderr, "Test %d: setting other failed!\n", gTestNr);
}


int
main(int argc, char** argv)
{
        set_env();
        environ = NULL;
        test_env();

        set_env();
        environ[0] = NULL;
        test_env();

        static char* emptyEnv[1] = {NULL};
        set_env();
        environ = emptyEnv;
        test_env();

        set_env();
        environ = (char**)calloc(1, sizeof(*environ));
        test_env();

        // clearenv() is not part of the POSIX specs
#if 1
        set_env();
        clearenv();
        test_env();
#endif

        return 0;
}