@dkocher commented

In a bash shell the transfer progress message should be replaced instead of adding a new line. What shell do you use to execute the command?

ef2996d commented

Running in the Windows 8.1 and Windows 10 default Windows shell (not PowerShell), from either a Batch file or command window.

In Windows 8.1, multiple output lines appear both when Duck output is redirected to a file and when it is not (output emitted in a command window).

In Windows 10, multiple output lines appear only when Duck output is redirected to a file. When output is not redirected (output emitted in a command window), the same output line is repeatedly overwritten, as intended.

My goal is to be able to redirect output to a log file without all the extra lines. I don't know how you would do that ... if the newline is not written you will likely just get all of that output on one line. And I don't know if there is any way for Duck to be aware that its output has been redirected. Hence the request for a command line option to suppress the transfer stats.

@dkocher commented

I suggest that you use --quiet and check the exit code of the program.

ef2996d commented

I have been using -q and then examining the return code from Duck, but Duck does not seem to provide a return code.

Here is my batch script code:

echo Wasabi user for %bckFolder% is "%wasUser%", folder is "%wasBckFolder%"  >> %logFile%
echo executing copy loop ...  >> %logFile%
for /F "tokens=*" %%A in (\\Odin\Backup-Staging\%bckFolder%\FileList.txt) do (
  echo %date% %time% Command = duck  -q -P -e rename --upload wasabisys://%wasUser%@%wasBckFolder%/%bckFolder%/ \\odin\Backup-Staging\%bckFolder%\%%A  >> %logFile%
  start /wait duck  -q -P -e rename --upload wasabisys://%wasUser%@%wasBckFolder%/%bckFolder%/ \\Odin\Backup-Staging\%bckFolder%\%%A  >> %logFile%
  echo Done %date% %time%, errorlevel = %errrorlevel%  >> %logFile%
)
echo Copy loop complete %date% %time%  >> %logFile%

Note the line at the end of the do loop:

echo Done %date% %time%, errorlevel = %errrorlevel% >> %logFile%

and here is the log file text

executing copy loop ...   
Thu 01/24/2019 17:03:03.23 Command = duck  -q -P -e rename --upload wasabisys://T5ZHIOV9VGMNBAKU1HQ4@Blaise-Backup/Magni/ Z:/Backup-Staging/Magni/20190121-Magni-Daily_20190124014500.nbd   

Upload complete…
Done Thu 01/24/2019 17:03:03.23, errorlevel =    
Copy loop complete Thu 01/24/2019 17:05:52.23   

the errorlevel appears not to be set ...