Shell-To and standard error

[JumpyVB]

How to access standard error on shell calls?

Public Sub Form_Open()
  Dim Stdout As String
  Shell "ls /root/" To Stdout
  Me.Text = Stdout
  ' Stdout is "" (i.e. empty) 
  ' Where do I find the error which should be:
  ' "ls: cannot open directory '/root/': Permission denied"
End

[BruceSteers]

How to access standard error on shell calls?

Public Sub Form_Open()
  Dim Stdout As String
  Shell "ls /root/" To Stdout
  Me.Text = Stdout
  ' Stdout is "" (i.e. empty) 
  ' Where do I find the error which should be:
  ' "ls: cannot open directory '/root/': Permission denied"
End

First use 2>&1 in the shell command to redirect stderr to stdout then use Process.LastValue to check for error value in last run process

Public Sub Form_Open()
  Dim Stdout As String

 ' First use 2>&1 to direct stderr to stdout

  Shell "ls /root/ 2>&1" To Stdout

  If Process.LastValue Then
   ' there was an error value so display the output text and Return
  Message.Error(Stdout)
  Return  
 Endif


  ' if error above then i did Return so if here there was no error and Stdout is no longer empty and should be a file list.

End

Note: only use this if using To or Wait with the Shell/Exec command so the process is not asynchronous and finishes before checking Process.LastValue or you may check the value of the previously run process.

[JumpyVB]

Thank you Bruce.