string creator(string file)

    Get the creator of a file.


string normalize_path(string file, string directory, string owner)

    Normalize a path.


int file_size(string file, int dirflag)	[System only]

    Check size of a file.  If dirflag is TRUE, recursively check size
    of directory.


void set_object_manager(object objectd)	[System only]

    Install an object manager, in which the following functions will be called
    afterwards:

    * void compiling(string path)

	The given object is about to be compiled.

    * void compile(string owner, object obj, string inherited...)

	The given object has just been compiled.  Called just before the object
	is initialized with create(0).

    * void compile_lib(string owner, string path, string inherited...)

	The given inheritable object has just been compiled.

    * void compile_failed(string owner, string path)

	An attempt to compile the given object has failed.

    * void clone(string owner, object obj)

	The given object has just been cloned.  Called just before the object
	is initialized with create(1).

    * void destruct(string owner, object obj)

	The given object is about to be destructed.

    * void destruct_lib(string owner, string path)

	The given inheritable object is about to be destructed.

    * void remove_program(string owner, string path, int timestamp, int index)

	The last reference to the given program has been removed.

    * string path_special(string compiled)

	If the standard include file contains the line `# include "AUTO"',
	this function is called so a file can be included that depends on
	what file is currently being compiled.

    * void include(string from, string path)

	The file `path' (which might not exist) is about to be included by
	`from'.

    * int forbid_call(string path)

	Return a non-zero value if `path' is not a legal first argument
	for call_other().

    * int forbid_inherit(string from, string path, int priv)

	Return a non-zero value if inheritance of `path' by `from' is not
	allowed.  The flag `priv' indicates that inheritance is private.


void set_error_manager(object errord)	[System only]

    Install an error manager, in which the following functions can be called
    afterwards:

    * void runtime_error(string error, int caught, mixed **trace)

	A runtime error has occurred.

    * void atomic_error(string error, int atom, mixed **trace)

	A runtime error has occurred in atomic code.

    * void compile_error(string file, int line, string error)

	A compile-time error has occurred.


void message(string str)	[System only]

    Show the given string with send_message().