buffering of process output

[山本和彦]

Emacs 21 has a different behavior of buffering of process output from
Emacs 20.7.

Evaluate the following in the *scratch* buffer

        (call-process "ping" nil t t "localhost")

On Emacs 20.7, each line is smoothly inserted every second.

On Emacs 21.3.50, however, insertion is awkward.

--Kazu

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In GNU Emacs 21.3.50.1 (i386-unknown-netbsdelf1.6T, X toolkit, Xaw3d scroll 
bars)
 of 2003-07-16 on caster.iij.ad.jp
configured using `configure '--without-xim' '--prefix=/usr/local/emacs21' 
'CFLAGS=-I/usr/pkg/include' 'CPPFLAGS=-I/usr/pkg/include -L/usr/pkg/lib' 
'LDFLAGS=-R/usr/pkg/lib -L/usr/pkg/lib -R/usr/X11R6/lib -L/usr/X11R6/lib''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: ja_JP.eucJP
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: japanese-iso-8bit
  default-enable-multibyte-characters: t

Recent input:
C-k C-c C-c y o <return> x s <return> C-p C-p C-p C-p 
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p SPC o <return> 
x s <return> C-p C-p C-p SPC v C-x b * s TAB <return> 
<down-mouse-1> <mouse-1> <double-down-mouse-1> <double-mouse-1> 
<down-mouse-1> <mouse-1> <double-down-mouse-1> <double-mouse-1> 
<triple-down-mouse-1> <triple-mouse-1> C-p ESC k C-u 
C-z m s <return> w k a z u @ TAB C-n h o g e ESC > 
C-c C-c y s <return> s <return> d x ESC x r e p o r 
t SPC b SPC SPC DEL SPC SPC SPC b SPC <return>

Recent messages:
Retrieving 1 message group in background...
1 message retrieved
No more messages
Refiling and deleting...
Connecting to the IMAP server...done
Communicating with the IMAP server...
Refiling 1 message group in background...
1 message group refiled
Making completion list... [2 times]
Loading emacsbug...done
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