problem with "more" under cygwin-1.3.13-1

[Christopher Faylor]

On Mon, Oct 14, 2002 at 01:30:19PM -0700, Joshua Daniel Franklin wrote:
>>* Jeff Johnston:
>>>>"set | more" only the first page is shown, it does not display the
>>>>"More" prompt, and the bash prompt appears at the bottom.
>>
>>>Try 1.3.13-2 if you haven't already.
>>
>>I'm used 13-2 and I can confirm Jeff's report.  More seems to have
>>broken.
>
>I ported 'more' mainly for people that have never heard of 'less' or
>people with extremely small disk space looking to cut corners.  I'll
>take a look as soon as I can, but *please* anyone who can use 'less',
>do so.
>
>BTW, does anyone have any additional details about the failure?

I do.  I managed to duplicate the problem by trying to run it on NT 4.0.
The problem is that more assumes that it can read characters from fd 2
which seems a remarkably iffy assumption.  It uses read(2, ...) to
characters from the 'tty'.

1.3.13 added code to invalidate reading on file descriptors that are
open only for writing.  Cygwin had been opening all of the standard
descriptors "appropriately" so that fd 0 was opened only for reading, fd
1 was opened for writing, ditto fd 2.

So, I've changed the code in cygwin so that it opens all of the standard
file descriptors in read/write mode initially.  This seems to mimic linux.

A more, IMO, robust change for more would be to open /dev/tty for reading
and use that for character input.

cgf

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