Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!xanth!nic.MR.NET!hal!ncoast!allbery
From: allbery@ncoast.UUCP (Brandon S. Allbery)
Newsgroups: comp.sys.ibm.pc
Subject: Strange happening with INT 21, AH=4EH
Message-ID: <13338@ncoast.UUCP>
Date: 15 Jan 89 05:28:32 GMT
Reply-To: allbery@ncoast.UUCP (Brandon S. Allbery)
Distribution: na
Organization: Cleveland Public Access UN*X, Cleveland, Oh
Lines: 21

In designing an "ls" program for myself, I've been playing with the INT 21
function 4E/4F (find first/next match file).  Just for laughs, I tried
invoking it on the pathname \DEV\CON -- and, to my surprise, it returned
with an attribute byte of 40H!  In playing with it, I discovered that
\DEV\CON was the *only* device that produced this behavior; other devices,
and \DEV\*.*, returned AX=3 (path not found).

This was done in a Turbo Pascal 3.01 program running under MS-DOS 3.21.

Anyone know if I hit a fluke or if this actually happens?  Does it have to
do with the device being open by the program (i.e. \DEV\CON is
stdin/stdout/stderr -- but then, \DEV\CON1 should be open as stdaux and
\DEV\LPT1 as stdprn)?

Thanks in advance, from a very curious
++Brandon
-- 
Brandon S. Allbery, moderator of comp.sources.misc    allbery@ncoast.org (soon)
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