From: Jean Louis <bugs@gnu.support>
To: Noam Postavsky <npostavs@gmail.com>
Cc: GNU Emacs Help <help-gnu-emacs@gnu.org>
Subject: Re: How to run shell command with stream input, to get string output
Date: Mon, 1 Jul 2019 14:15:42 +0200 [thread overview]
Message-ID: <20190701121542.GT11749@protected.rcdrun.com> (raw)
In-Reply-To: <CAM-tV--+=2hT_PgaY_QzbfzQAr4y3yR2ZzHPZ3N0d517UR849g@mail.gmail.com>
* Noam Postavsky <npostavs@gmail.com> [2019-07-01 13:13]:
> On Mon, 1 Jul 2019 at 05:45, Jean Louis <bugs@gnu.support> wrote:
>
> > Something like that, but it does not work as
> > output of process is not written in the buffer.
>
> When input is not newline terminated, cat requires two EOFs. I find
> this is the case when running outside of Emacs as well.
>
Excellent! Thank you.
I see it can work as below, and even markdown needs two times EOF.
(with-temp-buffer
(let* ((process (make-process :name "NEW"
:buffer (current-buffer)
:command '("markdown")
:sentinel #'ignore)))
(process-send-string process "Hello\n============")
(process-send-eof process)
(process-send-eof process)
(while (accept-process-output process))
(buffer-string)))
Maybe process-send-eof is making sure of one blank line on the end, as this works without 2 EOF:
(with-temp-buffer
(let* ((process (make-process :name "NEW"
:buffer (current-buffer)
:command '("markdown")
:sentinel #'ignore)))
(process-send-string process "Hello\n============\n")
(process-send-eof process)
(while (accept-process-output process))
(buffer-string)))
And this works too with proj software to convert coordinates, so I will use your example.
(with-temp-buffer
(let* ((process (start-process "NEW" (current-buffer) "cs2cs" "-f" "%.5f" "Arc 1960" "WGS84")))
(set-process-sentinel process #'ignore)
(process-send-string process "-1.47666 34.56861")
(process-send-eof process)
(while (accept-process-output process))
(buffer-string)))
Thank you,
Jean
next prev parent reply other threads:[~2019-07-01 12:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-30 22:32 How to run shell command with stream input, to get string output Jean Louis
2019-07-01 7:18 ` Marcin Borkowski
2019-07-01 8:17 ` Jean Louis
2019-07-01 8:38 ` tomas
2019-07-01 9:06 ` Jean Louis
2019-07-01 9:38 ` Robert Pluim
2019-07-01 9:43 ` Jean Louis
2019-07-01 11:12 ` Noam Postavsky
2019-07-01 12:15 ` Jean Louis [this message]
2019-07-01 9:10 ` Marcin Borkowski
2019-07-01 9:24 ` Jean Louis
2019-07-04 19:16 ` Marcin Borkowski
2019-07-04 20:33 ` Jean Louis
2019-07-04 20:38 ` Jean Louis
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