unsigned long getenv_ulong(const MEMX char *name, int base, unsigned long default_val);
bool getenv_yesno(const MEMX char *name);
int setenv_ulong(const MEMX char *varname, unsigned long value);
unsigned long getenv_ulong(const MEMX char *name, int base, unsigned long default_val);
bool getenv_yesno(const MEMX char *name);
int setenv_ulong(const MEMX char *varname, unsigned long value);