B4J Question Shell.run no output

Alpay ABAY · Monday at 8:42 AM

I tried a few different ways, I couldn't make this shell output work.
I tested .jar on ubuntu, when I run same code it works.
Not raising also any exception. It is a console application.
Looks like when I make shell call, application stops working. Never reaches to Log("Operation complete")

Please if anyone knows why ?

B4X:

    Try
        Dim shl As Shell
        shl.Initialize("shl", "/usr/bin/mpstat", Array("-P","ALL"))
        shl.Run(-1)
        Wait For shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)
        Log("done")
        Log("Ecode:"&ExitCode)
        Log("Error:"&StdErr)
        Log("out:"&StdOut)
        Log("Status:"&Success)
    Catch
        Log("Error execution")
        Log(LastException)
    End Try 
    Log("Operation complete")

teddybear · Monday at 4:24 PM

I guess you are using Non-UI app, you need to do StartMessageLoop waiting for shl_ProcessCompleted .
Try this code

B4X:

Sub AppStart (Args() As String)
        Dim shl As Shell
        shl.Initialize("shl", "/usr/bin/mpstat", Array("-P","ALL"))
        shl.Run(-1)
        StartMessageLoop
End Sub

Sub shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)
        Log("done")
        Log("Ecode:"&ExitCode)
        Log("Error:"&StdErr)
        Log("out:"&StdOut)
        Log("Status:"&Success)
        Log("Operation complete")
        StopMessageLoop
End Sub

Alpay ABAY · Monday at 6:25 PM

teddybear said:

I guess you are using Non-UI app, you need to do StartMessageLoop waiting for shl_ProcessCompleted .
Try this code

B4X:

Sub AppStart (Args() As String)
        Dim shl As Shell
        shl.Initialize("shl", "/usr/bin/mpstat", Array("-P","ALL"))
        shl.Run(-1)
        StartMessageLoop
End Sub

Sub shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)
        Log("done")
        Log("Ecode:"&ExitCode)
        Log("Error:"&StdErr)
        Log("out:"&StdOut)
        Log("Status:"&Success)
        Log("Operation complete")
        StopMessageLoop
End Sub

Thanks, but It is not relating to that. StartmessageLoop only wait main thread, but i call it with wait for to collect output and return, also your method with fail. I have various calls.

teddybear · 2024-12-24T05:06:45+0000

Alpay ABAY said:
Thanks, but It is not relating to that. StartmessageLoop only wait main thread, but i call it with wait for to collect output and return, also your method with fail. I have various calls.

The code works here. this's the result.

I don't know why it does not work your there. you'd better upload a small project for the question.

B4J Question Shell.run no output

Alpay ABAY

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B4J Question Shell.run no output

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