int access(const char *pathname, int mode)
{
    return -1;
}

int rmdir(const char *path)
{
    return -1;
}

int execv(const char *__path, char * const __argv[] )
{
    return -1;
}

int execve(const char *__path, char * const __argv[], char * const __envp[])
{
    return -1;
}

int execvp(const char *__file, char * const __argv[])
{
    return -1;
}

int dup(int __fildes )
{
    return -1;
}

int pclose(FILE *x)
{
    return -1;
}

FILE * popen(const char *x, const char *y)
{
    return NULL;
}