RE: Re: [PHP] stdin, stdout, stderr, 3

From: Per Jessen > Daniel Brown wrote: > >> On Sun, Mar 8, 2009 at 22:35, Richard Lynch <ceo@l-i-e.com> wrote: >>> I have a program sending/receiving data to/from my CLI script using: >>> >>> 0 stdin >>> 1 stdout >>> 2 stderr >>> 3 ?????? >> >> UNIX Channel 3 is a non-standard stream resource, though I don't >> believe it's even yet been given a name, so we'll have to change that. > > "UNIX Channel 3" ?? > It's just file descriptor 3, that's all. In the old days, it was > occasionally called "stdaux", but AFAIK that's not used any more. AUX and PRN for 3 and 4 were standard for a serial port and printer interface respectively on CP/M and then PC-DOS 1.0. Both were carried through to later versions of MS-DOS, but not used nor referenced very much. I don't recall seeing them in a Unix context at all. Bob McConnell