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Re: [Pkg-shadow-devel] Bug#476519: shell-mode garbles input

From: Chet Ramey
Subject: Re: [Pkg-shadow-devel] Bug#476519: shell-mode garbles input
Date: Fri, 02 May 2008 12:50:49 -0400
User-agent: Thunderbird (Macintosh/20080213)

Stephane Chazelas wrote:

Could be a tty setting as well.

stty min 0 time 10 -icanon

could reproduce that if bash was built without readline I think.
With readline, bash is meant to reset those min and time
parameters before each prompt. Maybe it fails to do so in which
case strace will tell you as well.

You beat met to it. :-)  Does this happen only in an emacs shell-mode
window?  If that is the case, then readline doesn't enter into the
picture -- bash disables line editing when it can tell it's being run
by emacs -- and uses read(2).  read can return failure right away
(-1/EAGAIN) or 0 (no data available) if it's called with the tty in
non-canonical mode and those tty settings.  Either value will be
translated to EOF and cause the shell to exit.


``The lyf so short, the craft so long to lerne.'' - Chaucer
                       Live Strong.  No day but today.
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/

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