Path: utzoo!attcan!uunet!cbmvax!jesup
From: jesup@cbmvax.UUCP (Randell Jesup)
Newsgroups: comp.sys.amiga.tech
Subject: Re: DOS questions
Keywords: DOS seek IFF
Message-ID: <4701@cbmvax.UUCP>
Date: 12 Sep 88 04:05:28 GMT
References: <7066@well.UUCP>
Reply-To: jesup@cbmvax.UUCP (Randell Jesup)
Organization: Commodore Technology, West Chester, PA
Lines: 18

In article <7066@well.UUCP> shf@well.UUCP (Stuart H. Ferguson) writes:
>When writing IFF files, it's important to know if the file you're
>writing to is "seekable," that is, the file can be randomly accessed. 
>Disk files are seekable, but pipes may not be.  So the question is,
>given a DOS FileHandle (or filename or something) is there a way to tell
>if the file is seekable? 

	The only solution at the time being is to attempt a Seek().  It
should return an error if it is not supported.

>Also, what happens if you try to seek on a pipe?  An error?  A Guru?  Or 
>does it work sometimes and not others?

	Any proper pipe returns an error (probably ERROR_ACTION_NOT_KNOWN),
but you should check for any error.

-- 
Randell Jesup, Commodore Engineering {uunet|rutgers|allegra}!cbmvax!jesup