powershell - Is Out-Host buffering? -


i ha function, call application & operator. application produces several line command line output, downloads files, , returns string:

& "app.exe" | out-host $var = ... return $var

it seems, on console appears output produced app.exe after app.exe terminates. user not have real time information file downloading. there way continuously update console when app.exe running?

many console applications buffer theirs output stream, if known redirected. actually, it standard behavior of c library. so, buffering done app.exe, because of redirection, not out-host.

solution not redirect output of app.exe, when outer command redirected. should know exact condition, when powershell not redirect output stream of console application , link directly own output stream, console interactive powershell.exe session. conditions is:

  1. command last item in pipeline.
  2. command piped out-default.

solution wrap command script block, , pipe script block out-default:

& { & "app.exe" } | out-default

the other solution use start-process cmdlet -nonewwindow , -wait parameters:

start-process "app.exe" -nonewwindow -wait

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