Path: utzoo!dciem!nrcaer!scs!spl1!laidbak!att!pacbell!ames!ll-xn!husc6!cs.utexas.edu!ut-sally!ut-emx!boerner
From: boerner@ut-emx.UUCP (Brendan B. Boerner)
Newsgroups: comp.sys.ibm.pc
Subject: Re: C write() operations to MS-DOS devices?
Message-ID: <2979@ut-emx.UUCP>
Date: 2 Jun 88 20:22:10 GMT
Article-I.D.: ut-emx.2979
References: <1318@tahoe.unr.edu>
Reply-To: boerner@emx.UUCP (Brendan B. Boerner)
Organization: Univ. of Texas at Austin, Computation Center
Lines: 22

In article <1318@tahoe.unr.edu> malc@tahoe.unr.edu (Malcolm L. Carlock) writes:
>
>Can anyone tell me, or point me to some info describing, how to do a C write()
>operation to an MS-DOS device (such as PRN, AUX, etc.) ?
>
>I have looked through the MicroSoft C V.5.0 manuals, but have found very
>little, if anything, on this subject.  The DOS manual likewise had little
>or nothing to say about these devices, programming-wise.
>
>Neither PRN nor LPT1 are defined in any of the I/O or file-control .h files,
>nor do they appear in any of the C manual indexes.
>
>Thanks in advance,

I don't know about PRN: or LPTx:, but I tried to access COM0x: as files
using MS QuickC and found that I could not get it to work.  MS tech support
told me that I would need to write some code to read/write to the serial
ports as you couldn't open them as files.

Hope this helps.

Brendan