Re: Ftp freezes on w32

[Lennart Borgman <lennart.borgman.073@student.lu.se>]

Lennart Borgman wrote:
> Lennart Borgman wrote:
>> Lennart Borgman wrote:
>>> I have seen a problem with ftp on w32 which I have not had time to 
>>> report before. The problem is that if I make a small pause for some 
>>> minutes then ftp hangs. Looks like there perhaps is some problem 
>>> with the ftp process. Here is a more detailed description:
>>>
>>>
>>> I have downloaded the ftp program mentioned on 
>>> http://www.emacswiki.org/cgi-bin/wiki/AngeFtp and my 
>>> ange-ftp-ftp-program-name is c:/dl/ftp-for-win32/Release/ftp.exe. I 
>>> am using w2k on this pc. My CVS Emacs is from 2006-11-03.
>>>
>>> I open a remote file with the name 
>>> "/ftp:someuser@ftp.somehost.com:/htdocs/somepath/index.html". After 
>>> doing the first changes to the remote file point is on line 79 in 
>>> the buffer "*ftp someuser@ftp.somehost.com*".
>>>
>>> Now I wait maybe 10 min. Then I try again to change the file. Now 
>>> Emacs freezes right after the first character, but C-g helps and the 
>>> screen gets updated again. Looking in the ftp buffer point is still 
>>> on line 79 right after the prompt. However now there is some text 
>>> after the prompt:
>>>
>>>  ftp> quote mdtm /htdocs/somepath/index.html
>>>
>>> If I in the window showing the ftp buffer now press up arrow I get 
>>> the error message:
>>>
>>>  Wrong type argument: processp, nil
>>
>> I have looked at this a bit more. The process get killed in 
>> `ange-ftp-wait-not-busy' so there is no strange with that the process 
>> is gone.
>>
>> However what is happening is that the `ange-ftp-wait-not-busy' never 
>> ends. The process filter in `ange-ftp-process-filter' recieves a 
>> string with only nulls (in the argument str).
>>
>> Since this is reproducible it seems possible to make a fix for it. A 
>> signal can be sent from the process filter and this can be caught in 
>> `ange-ftp-raw-send'. But it does not seem quite right to me.
>>
>> Is there not something suspicious about that the process filter 
>> receives just nulls? Is there something wrong with emacs_read?
>
> Some more information.
>
> Workaround: It is possible to workaround the problem by simply 
> deleting the inferior ftp process in `ange-ftp-process-filter' when a 
> string with just a lot of nulls is recieved.

I was wrong when I said I can work around the problem by deleting the 
inferior ftp process. I can't because I can not get rid of the ftp 
process. It seems impossible in Emacs on w32.

Does someone have any reciepe how to get ange-ftp to work on w32? I do 
not know of any way to get it working.