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Re: stdbuf does not work




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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