-char *getenv(const char *name);
-unsigned long getenv_ulong(const char *name, int base, unsigned long default_val);
+char *getenv_str(const MEMX char *name);
+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);
+int setenv_hex(const MEMX char *varname, unsigned long value);