Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!nrl-cmf!mailrus!tut.cis.ohio-state.edu!osu-cis!att!att-ih!chinet!saj
From: saj@chinet.UUCP (Stephen Jacobs)
Newsgroups: comp.sys.atari.st
Subject: Re: Caching in GEMDOS
Message-ID: <4897@chinet.UUCP>
Date: 21 Apr 88 04:54:45 GMT
References: <454@nikhefh.hep.nl>
Organization: Chinet - Chicago Public Access UNIX
Lines: 9
Summary: Explains an odd bug I once got


The referenced posting (a detailed explanation of the builtin cacheing done by
GEMDOS) seems to explain a bug I encountered in a toy program I wrote to 
manipulate floppy disk volume labels.  It openned a file marked as a volume
label (ala MS-DOS), then hunted out the directory entry (after closing the
file) and changed trailing spaces to trailing nulls (to match the format of a
desktop-created volume label)(I may have blanks and nulls reversed).  Well,
after the program terminated, the blanks were back! (Yeah, I reread the 
directory entry after changing it).  But 2 separate caches...one flushed on
file closing, the other on program termination---interesting.