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Re: POSTQUOTE rename on SFTP

From: Jonas Schnelli <>
Date: Sun, 30 Oct 2011 23:01:48 +0100

> On Sun, Oct 30, 2011 at 01:11:05PM +0100, Jonas Schnelli wrote:
>> I try to do a kind-of atomic upload over sftp with libcurl.
>> Currently i'm sending a postquote command "rename" (after uploading a random uuid filename).
>> The rename works fine...
>> But when the destination file already exists, then the command fails with "rename command failed: Operation failed".
>> Libcurl tells libssh2 LIBSSH2_SFTP_RENAME_OVERWRITE: so, the overwrite should be possible.
> Let me guess--the server is running Windows, right? This kind of problem has
> been reported before, and IIRC seems to have something to do with the remote
> server leaving the file open before the rename occurs. Renaming open files
> is verboten under Windows, so it errs out. Search the mailing list archives
> and you'll find some more details; I believe the conclusion was that it was
> a problem in the remote server and not libcurl, but don't quote me on that.

Hmm.. no windows.
It's a standard debian lenny (6.0) linux server.

When i do two post commands, first a rm (delete) followed by the rename, then it works perfect.
But it's a bit weak to delete the "active" file when i'm not 100% sure that the rename will work.

As soon as i have time i do some debugging in libssh2.

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Received on 2011-10-30