B4J Question jshell excute echo not working

[jinyistudio]

Hi
It working in rpi3 when i run "echo 1 > /dev/sys-led" in the command line.
following code it can't working but ProcessCompleted is success when i run it in my b4j no-ui-app but jshell

Dim lst As List
lst.Initialize2(Array As String($"'${jylab.IIF(sysledst,1,0)}'"$,">","/dev/sys-led"))
Dim shl As Shell
shl.Initialize("gpio","echo",lst)
shl.Run(-1)
sysledst = Not(sysledst)

 

[Erel]

The redirection is a feature of the Linux terminal. It is not a feature of "echo" so it cannot work.

You can probably do it by running bash. In Windows it is done by running cmd.exe /c.

 

[jinyistudio]

Ha. It is OK ?

File.WriteString("/dev","sys-led",jylab.IIF(sysledst,"1","0"))