GNU bug report logs - #7078
24.0.50; process-send-string doesn't work with long lines on Solaris

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Knut Anders Hatlen <kahatlen <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.50; process-send-string doesn't work with long lines on Solaris
Date: Tue, 21 Sep 2010 00:18:30 +0200

With Emacs 24 on Solaris, the code below will insert ^G into the current
buffer. With Emacs 23.2, and with Emacs 24 on Linux, it will insert 257
a's into the current buffer, which is the expected behaviour. The
problem is only seen if the string passed to process-send-string
contains lines that exceed 256 characters.

(let ((process (start-process "cat" (current-buffer) "cat")))
  (process-send-string process (format "%s\n" (make-string 257 ?a))))

The bug was introduced with this change:

revno: 99890
committer: Stefan Monnier <monnier <at> iro.umontreal.ca>
branch nick: trunk
timestamp: Mon 2010-04-12 22:07:48 -0400
message:
  Try to solve the problem of spurious EOF chars in long lines of text
  sent to interactive subprocesses.
  * sysdep.c (child_setup_tty): Do not enable ICANON any more.
  (system_process_attributes): Remove unused var `ttotal'.
  * process.c (send_process): Don't bother breaking long line with EOF
  chars when talking to ttys any more.
  (wait_reading_process_output): Output a warning when called in such
  a way that it could block without being interruptible.


-- 
Knut Anders

Message #10 received at 7078 <at> debbugs.gnu.org (full text, mbox):

From: Hendrik Tews <hendrik <at> askra.de>
To: 7078 <at> debbugs.gnu.org
Subject: works with (setq process-connection-type nil)
Date: Fri, 14 Sep 2012 11:14:39 +0200

Hi,

with emacs 24.2 257 characters work, but probably only because
some buffer has been increased to 4K. Trying with 6000
characters, will only insert the first 4K characters.

However, with process-connection-type set to nil everything works
as expected.

Bye,

Hendrik Tews

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