From: Eli Zaretskii <eliz@gnu.org>
To: Lucas Werkmeister <mail@lucaswerkmeister.de>,
Paul Eggert <eggert@cs.ucla.edu>,
Lars Ingebrigtsen <larsi@gnus.org>
Cc: 65156@debbugs.gnu.org
Subject: bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported
Date: Tue, 08 Aug 2023 21:33:55 +0300 [thread overview]
Message-ID: <83fs4tmlik.fsf@gnu.org> (raw)
In-Reply-To: <4b873c29-e8ca-403c-bd37-a531d93661f3@lucaswerkmeister.de> (message from Lucas Werkmeister on Tue, 8 Aug 2023 20:20:23 +0200)
> Date: Tue, 8 Aug 2023 20:20:23 +0200
> From: Lucas Werkmeister <mail@lucaswerkmeister.de>
>
> Launch graphical Emacs with standard input attached to a pipe, then
> attempt to insert /dev/stdin, for example:
>
> echo test | emacs -Q --insert /dev/stdin
> echo test | emacs -Q --eval '(insert-file-contents "/dev/stdin")'
>
> This now results in an error (and nothing inserted into the buffer):
> "Maximum buffer size exceeded".
The doc string says:
When inserting data from a special file (e.g., /dev/urandom), you
can’t specify VISIT or BEG, and END should be specified to avoid
inserting unlimited data into the buffer.
> Previously, this used to work; git bisect identifies cb4579ed6b ("Allow
> inserting parts of /dev/urandom with insert-file-contents", bug#18370)
> as the first bad commit.
>
> Other (non-stdin) pipes are also affected. Testing with a named pipe
> shows that the error only occurs after the pipe is first written to:
>
> # first terminal:
> mkfifo /tmp/fifo
> emacs -Q
> M-x insert-file /tmp/fifo
> # second terminal:
> { echo x; sleep 10; echo y; } > /tmp/fifo
>
> Before you run the command in the second terminal, you can observe that
> Emacs is just waiting for input from the pipe; as soon as you run the
> other command, Emacs shows the error before the sleep finishes.
Lars, Paul, any suggestions?
next prev parent reply other threads:[~2023-08-08 18:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-08 18:20 bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported Lucas Werkmeister
2023-08-08 18:33 ` Eli Zaretskii [this message]
2023-08-08 19:27 ` Eli Zaretskii
2023-08-09 2:47 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-09 11:31 ` Eli Zaretskii
2023-08-09 20:57 ` Paul Eggert
2023-08-10 5:17 ` Eli Zaretskii
2023-08-10 6:08 ` Paul Eggert
2023-08-10 8:15 ` Eli Zaretskii
2023-08-11 17:18 ` Paul Eggert
2023-08-11 18:30 ` Eli Zaretskii
2023-08-11 21:45 ` Paul Eggert
2023-08-12 8:05 ` Eli Zaretskii
2023-08-12 8:58 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-09 8:07 ` Mattias Engdegård
2023-08-09 8:15 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-09 8:29 ` Mattias Engdegård
2023-08-09 12:00 ` Eli Zaretskii
2023-08-09 12:03 ` Mattias Engdegård
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