Inside Macintosh: Files /

Chapter 1 - Introduction to File Management / File Management Reference

File Access Routines / Reading, Writing, and Closing Files

FSClose

You can use the FSClose function to close an open file.

FUNCTION FSClose (refNum: Integer): OSErr;

refNum

The file reference number of an open file.

DESCRIPTION

The FSClose function removes the access path for the specified file and writes the contents of the volume buffer to the volume.

Note

The FSClose function calls PBFlushFile internally to write the file's bytes onto the volume. To ensure that the file's catalog entry is updated, you should call FlushVol after you call FSClose.

WARNING

Make sure that you do not call FSClose with a file reference number
of a file that has already been closed. Attempting to close the same file twice may result in loss of data on a volume. See the description of
file control blocks in the chapter "File Manager" in this book for a discussion of how this can happen.

RESULT CODES

noErr	0	No error
ioErr	-36	I/O error
fnOpnErr	-38	File not open
fnfErr	-43	File not found
rfNumErr	-51	Bad reference number