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bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents
From: |
Eli Zaretskii |
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 |
> 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?
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Lucas Werkmeister, 2023/08/08
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported,
Eli Zaretskii <=
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Eli Zaretskii, 2023/08/08
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Paul Eggert, 2023/08/09
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Eli Zaretskii, 2023/08/10
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Paul Eggert, 2023/08/10
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Eli Zaretskii, 2023/08/10
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Paul Eggert, 2023/08/11
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Eli Zaretskii, 2023/08/11
- bug#65156: 29.1; Reading from pipe with --insert or insert-file-contents no longer supported, Paul Eggert, 2023/08/11