R devel - Jul 2018 - Possible bug: R --slave --interactive stdin echo on Linux when stdin is a fifo

On Thu, 26 Jul 2018, G?bor Cs?rdi wrote:
> On Thu, Jul 26, 2018 at 12:25 PM Barry Rowlingson
> <b.rowlingson at lancaster.ac.uk> wrote:
>>
>> On Thu, Jul 26, 2018 at 12:22 AM, G?bor Cs?rdi <csardi.gabor at
gmail.com> wrote:
>>> I am trying to control a background R session, connected via a fifo
/
>>> named pipe.
>>
>>  Is the fifo significant here? If I read the same R code from a file
>> via `<` I get the input echoed (R 3.4.4, Ubuntu).
>
> Yeah, for a file I get echo on both macOS and Linux, but not on Windows.
>
> I think the most useful behavior for --slave is no echo at all, maybe?
> But I might be missing the motivation behind --slave.
>
> Another thing is that windows does not have --interactive. Is there a
> way to run R
> 1) without echoing stdin, and
I'm not seeing an echo for your example on Ubuntu or Fedora.
> 2) without quitting on the first error,
> on all platforms?
One option is to use

     options(error = function() invokeRestart("abort"))

There may be better ways.

Best,

luke
>
> Gabor
>
>> Barry
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
-- 
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:   luke-tierney at uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu

On Thu, Jul 26, 2018 at 1:43 PM <luke-tierney at uiowa.edu>
wrote:
>
> On Thu, 26 Jul 2018, G?bor Cs?rdi wrote:
>
> > On Thu, Jul 26, 2018 at 12:25 PM Barry Rowlingson
> > <b.rowlingson at lancaster.ac.uk> wrote:
> >>
> >> On Thu, Jul 26, 2018 at 12:22 AM, G?bor Cs?rdi <csardi.gabor at
gmail.com> wrote:
> >>> I am trying to control a background R session, connected via a
fifo /
> >>> named pipe.
> >>
> >>  Is the fifo significant here? If I read the same R code from a
file
> >> via `<` I get the input echoed (R 3.4.4, Ubuntu).
> >
> > Yeah, for a file I get echo on both macOS and Linux, but not on
Windows.
> >
> > I think the most useful behavior for --slave is no echo at all, maybe?
> > But I might be missing the motivation behind --slave.
> >
> > Another thing is that windows does not have --interactive. Is there a
> > way to run R
> > 1) without echoing stdin, and
>
> I'm not seeing an echo for your example on Ubuntu or Fedora.
Interesting. Do you mean the fifo example, or just a file? Or both?
I wonder what this depends on then....

Particularly interesting that this does echo on macOS:
echo '1+1' | R --slave --interactive
But the FIFO example does not.

Anyway, it seems that if I remove --interactive then I get no echo.
> > 2) without quitting on the first error,
> > on all platforms?
>
> One option is to use
>
>      options(error = function() invokeRestart("abort"))
This seems good enough for my use case, thanks much!
Luckily, this also solves the "disabling the crash dialog" problem,
which I
have if I specify --interactive.

Gabor
> There may be better ways.
>
> Best,
>
> luke
>
> >
> > Gabor
> >
> >> Barry
> >
> > ______________________________________________
> > R-devel at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
> >
>
> --
> Luke Tierney
> Ralph E. Wareham Professor of Mathematical Sciences
> University of Iowa                  Phone:             319-335-3386
> Department of Statistics and        Fax:               319-335-3017
>     Actuarial Science
> 241 Schaeffer Hall                  email:   luke-tierney at uiowa.edu
> Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu

On Thu, 26 Jul 2018, G?bor Cs?rdi wrote:
> On Thu, Jul 26, 2018 at 1:43 PM <luke-tierney at uiowa.edu> wrote:
>>
>> On Thu, 26 Jul 2018, G?bor Cs?rdi wrote:
>>
>>> On Thu, Jul 26, 2018 at 12:25 PM Barry Rowlingson
>>> <b.rowlingson at lancaster.ac.uk> wrote:
>>>>
>>>> On Thu, Jul 26, 2018 at 12:22 AM, G?bor Cs?rdi <csardi.gabor
at gmail.com> wrote:
>>>>> I am trying to control a background R session, connected
via a fifo /
>>>>> named pipe.
>>>>
>>>>  Is the fifo significant here? If I read the same R code from a
file
>>>> via `<` I get the input echoed (R 3.4.4, Ubuntu).
>>>
>>> Yeah, for a file I get echo on both macOS and Linux, but not on
Windows.
>>>
>>> I think the most useful behavior for --slave is no echo at all,
maybe?
>>> But I might be missing the motivation behind --slave.
>>>
>>> Another thing is that windows does not have --interactive. Is there
a
>>> way to run R
>>> 1) without echoing stdin, and
>>
>> I'm not seeing an echo for your example on Ubuntu or Fedora.
>
> Interesting. Do you mean the fifo example, or just a file? Or both?
> I wonder what this depends on then....
The fifo one -- I didn't try a file.
>
> Particularly interesting that this does echo on macOS:
> echo '1+1' | R --slave --interactive
> But the FIFO example does not.
>
> Anyway, it seems that if I remove --interactive then I get no echo.
Looks like this has to do with readline, which --interactive turns on.
If I use '--no-readline --interactive' (in that order) on Mac OS and
Linux I get no echo.

The code in R for all this should be identical on Linux and Mac OS --
both use the unix code. readline libraries may differ, shell/stty
settings may differ for your setup.

Best,

luke
>
>>> 2) without quitting on the first error,
>>> on all platforms?
>>
>> One option is to use
>>
>>      options(error = function() invokeRestart("abort"))
>
> This seems good enough for my use case, thanks much!
> Luckily, this also solves the "disabling the crash dialog"
problem, which I
> have if I specify --interactive.
>
> Gabor
>
>> There may be better ways.
>>
>> Best,
>>
>> luke
>>
>>>
>>> Gabor
>>>
>>>> Barry
>>>
>>> ______________________________________________
>>> R-devel at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>>
>>
>> --
>> Luke Tierney
>> Ralph E. Wareham Professor of Mathematical Sciences
>> University of Iowa                  Phone:             319-335-3386
>> Department of Statistics and        Fax:               319-335-3017
>>     Actuarial Science
>> 241 Schaeffer Hall                  email:   luke-tierney at uiowa.edu
>> Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu
>
-- 
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:   luke-tierney at uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu