Chapter 7 File Manager Functions

Error	Description
mgArgErr	Not a valid file descriptor.
fIOErr	Unspecified I/O error occurred.

Positioning the End-Of-File Mark

FGetEOF

syntax		MgErr	FGetEOF(fd, sizep);
	FGetEOF returns the size of the specified file.
	Parameter		Type	Description
	fd		File	File descriptor associated with the file.
	sizep		int32 *	Address at which FGetEOF stores the size of the
				file in bytes. If an error occurs, the contents of
				*sizep is undefined.
				See the Pointers as Parameters section of
				Chapter 1, CIN Overview, for more information
				about using this parameter.
returns		MgErr, which can contain the errors in the following list.
	Error		Description
	mgArgErr		Not a valid file descriptor.
	fIOErr		Unspecified I/O error occurred.

FSetEOF

syntax	MgErr	FSetEOF(fd, size);
FSetEOF sets the size of the specified file. If an error occurs, the file size does not
change.
Parameter	Type	Description
fd	File	File descriptor associated with the file.
size	int32	New file size in bytes.
returns	MgErr, which can contain the errors in the following list.

LabVIEW Code Interface Reference Manual

7-12

National Instruments Corporation