libfetch ftp patch for less latency

Nate Lawson nate at
Fri Apr 20 17:39:53 UTC 2007

Yar Tikhiy wrote:
> On Wed, Apr 18, 2007 at 04:48:45PM -0400, John Baldwin wrote:
>> On Saturday 07 April 2007 15:47, Nate Lawson wrote:
>>> Dag-Erling Sm?rgrav wrote:
>>>> Nate Lawson <nate at> writes:
>>>>> Obviously, it's easier to do nothing than something.  So here are some
>>>>> options:
>>>>> 1. Add my patch -- if a server returns an error, I see no way it would
>>>>> have changed the PWD.  If you say "CD GARBAGE", what reasonable system
>>>>> would return an error and change to some random dir?
>>>>> 2. Add an env variable (similar to FTP_PASSIVE_MODE, say
>>>>> "FTP_SINGLE_CWD") which forces the current behavior.  If not set, fetch
>>>>> tries the multi-method first, falls back to the single-method on error.
>>>> No.
>>>> Thanks,
>>>> DES
>>> I forgot:
>>> 3. #ifdef (on or off by default)
>>> Also, can I hear from anyone else besides Mr. No?
>> I'm hestitant to make fetch explicitly not follow the RFC.  At the least it
>> should follow the RFC by default.  Having it not follow the RFC actually
>> broke stuff at work until I fixed it.
> I believe that the proposed feature should be conditional on the
> TVFS extension in the server (RFC 3659) as it indeed violates the
> basic FTP protocol.  OTOH, TVFS seems to provide guarantees that
> a single CWD will work as expected.

I'll do the work if this is acceptable.


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