cygwin Rsync x32 issue

[Ken Brown]

On 2/13/2021 11:33 PM, Jim Brain wrote:
> I perused the archive and did not see anything noted about this, but please 
> forgive me if it's been discussed.
> 
> Server: ubuntu 2004, running rsync 3.1.3 protocol version 31
> 
> client Windows 10 x64.
> 
> When calling rsync x64 3.2.4dev, transfer works fine.
> 
> When using rsync x32 3.2.4dev, downloaded last night, same transfer fails, with:
> 
> "
> 
> dup() in/out/err failed
> rsync: connection unexpectedly closed (0 bytes received so far) [sender]
> [sender] _exit_cleanup(code=12, file=io.c, line=228): entered
> rsync error: error in rsync protocol data stream (code 12) at io.c(228) 
> [sender=3.2.4dev]
> [sender] _exit_cleanup(code=12, file=io.c, line=228): about to call exit(12)
> 
> "
> 
> cwrsync fails in the same way.
> 
> Sadly, I would ignore and just use x64 rsync (as I normally do on my system 
> here), but this is to set up a sync job for a elderly user who wants to update 
> his web site and only has Windows x32 bit.
> 
> Any help would be most appreciated.  I can probably come up with an alternate 
> solution (scp or zip/ftp) but rsync seemed a clean approach to ensuring his 
> local version of the site and the web version stayed in sync.

There was a bug in Cygwin's implementation of fstatat(2) that was recently 
reported and fixed.  It affected 32-bit only.  On the chance that you've bumped 
into the same bug, you could try a snapshot of cygwin1.dll to see if that fixes 
the problem:

   https://cygwin.com/snapshots/

Ken