Mail Archives: cygwin-developers/1999/12/10/21:53:17
On Fri, Dec 10, 1999 at 01:00:42AM -0500, Chris Faylor wrote:
>>> What shell are you using?
>>The shell is bash 2.02 from cygwin b20.1, copied to /bin/sh.exe.
>>>
>>> Does pwd actually
>>> have a value?
>>
>>What do you mean?
>>$(pwd) is a command in a sub-shell, not a variable.
>
>Doh. That's right. I've got make on the brain.
>
>>Shell built-in commands eg $(pwd) never work.
>>External commands eg $(dirname /foo/bar) work most times, but hang maybe
>>1 time in 20.
>>A ^C brings back the prompt every time (but one).
>
>The hanging problem should be fixed.
>
>I think I know how to deal with this problem but it will have to wait
>until tomorrow.
I've checked in changes that seem to fix this. It was an interesting
problem. read() was setting the EINTR errno but it was getting
overwritten by a signal handler because I've changed the way signal
handlers are called now. Although, actually, I would not be surprised
to hear that this cropped up with B20.1 one time in a thousand too.
So, now, in some situations, I save the errno for restoration when
a signal handler returns.
Lemme know if this works. Before this patch, I got no output fairly
frequently. Now I always get what I expect.
cgf
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