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Subject: Re: stdbuf does not work
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From: Eliot Moss <moss AT cs DOT umass DOT edu>
Message-ID: <a679a9c3-be81-741b-532e-b3560933f97b@cs.umass.edu>
Date: Sat, 18 Aug 2018 09:14:10 -0400
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On 8/18/2018 8:36 AM, Donald Krieger via cygwin wrote:
> Dear list,
> I require line buffered output from program1 and line buffered input to program2.The following works under Linux but not under Cygwin.   stdbuf -oL -eL program 1 |& program2
> 
> I've searched the archive without success.I have tried -o0 -e0 -i0 and have also tried
>    stdbuf -oL -eL program1 |& stdbuf -i0 program2
> I have a fresh installation of cygwin as of a few months ago:  uname -a              yields:CYGWIN_NT-10.0 DESKTOP-S92525R 2.10.0(0.325/5/3) 2018-02-02 15:16 x86_64 Cygwin
>    stdbuf --version    yields:stdbuf (GNU coreutils) 8.26Packaged by Cygwin (8.26-2)Copyright (C) 2016 Free Software Foundation, Inc....

Some thoughts to consider:

- -i0 means unbuffered; did you write the wrong description above?
- As noted in the strbuf man page, some programs don't use streams and thus are
   not affected by strbuf settings.  I agree this is not something likely to
   change for the same program ported from Linux to Cygwin.
- How do you have line endings set up on Cygwin or in any files you are
   processing?  The usual Windows line ending   being CR-LF instead of Linux's
   LF can confuse some programs.

It might also help potential responders to know a little more about what program1 and
program2 are.  Are they Windows or Cygwin programs?

Regards - EM

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