[Bug 1798] Add fsync() support to sftp/sftp-server

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=1798

Damien Miller <djm at mindrot.org> changed:

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--- Comment #19 from Damien Miller <djm at mindrot.org> ---
Created attachment 2351
  --> https://bugzilla.mindrot.org/attachment.cgi?id=2351&action=edit
Updated to -current

Revised patch, with description of extension in the PROTOCOL file.

Hopefully I'll be able to get it in this time. I wasn't able to
convince everyone that it was worth the DoS risk before (many platforms
implement fsync() by just calling the fs-wide sync() function which can
trigger a lot of I/O), but now we have the request blacklist that can
avoid this in cases where users can't be trusted.

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