I'm trying to drive a command prompt by sending instructions via a NamedPipe.
This way you can (should) be able to send commands to the command prompt and at the same time "view" the result in the same window.
This is not allowed if you run a command prompt with "opt_flag" parameters (redirected streams) because this will disable StdOut on the cmd itself.
This small (trivial) snippet works for the first command sent to the cmd, but further submissions will fail.
Maybe the problem is in how I use the run () command to start a new cmd with the StdIn redirect from the NamedPipe. It seems that the generated cmd will close automatically after the first reception of the command via NamedPipe.
suggestions on how to make it work are welcome
#include <NamedPipes.au3> #include <WinAPI.au3> ; Creates an instance of a named pipe Global $sPipeName = "\\.\pipe\pipename" Global $hPipe = _NamedPipes_CreateNamedPipe($sPipeName, 1, 1) MsgBox(0, "Debug", "Pipe created. Now open a CMD") ; run a cmd with only StdIn redirected (StdIn data incoming from a pipe) Global $hCMD = Run(@ComSpec & " /K cmd < " & $sPipeName & @CRLF, "c:\") ; ok? MsgBox(0, "Debug", "now Send a command to the cmd via a NamedPipe") _StdInPipeWrite("dir" & @CRLF) MsgBox(0, 'Debug', "further commands will fail" & @CRLF & "now send command 'dir c:\windows'") $sMessage = "Dir c:\windows" & @CRLF _StdInPipeWrite($sMessage) MsgBox(0, 'Debug', "send another command (will also fail)" & @CRLF & "now send command 'echo Hello'") _StdInPipeWrite("echo Hello" & @CRLF) MsgBox(0, "Debug", "end of test") ProcessClose($hCMD) Func _StdInPipeWrite($sMessage) ; =============================================================================================================================== ; This function writes a message to the pipe ; =============================================================================================================================== Local $iWritten, $iBuffer, $pBuffer, $tBuffer $iBuffer = StringLen($sMessage) + 1 $tBuffer = DllStructCreate("char Text[" & $iBuffer & "]") $pBuffer = DllStructGetPtr($tBuffer) DllStructSetData($tBuffer, "Text", $sMessage) If Not _WinAPI_WriteFile( _ $hPipe, _ ; ...... Handle to the file to be written $pBuffer, _ ; .... Pointer to the buffer containing the data to be written $iBuffer, _ ; .... Number of bytes to be written to the file $iWritten, _ ; ... The number of bytes written 0 _ ; ............ [optional] A $tagOVERLAPPED structure or a pointer to it ) Then ConsoleWrite("WriteMsg: _WinAPI_WriteFile failed" & @CRLF & _WinAPI_GetLastErrorMessage()) Else ConsoleWrite("WriteMsg: write OK" & @CRLF & _WinAPI_GetLastErrorMessage() & @CRLF) EndIf EndFunc ;==>_StdInPipeWrite
I am trying to use ConsoleWrite() to output some debug to stdout/console on a Windows command (cmd) window, but it seems like nothing is being output.
I noted that the help says:
but what does that mean (the "compiled as a console application" part?
I have also tried adding
to the beginning of my .au3 and re-compiling, but when I run the .exe in a command window, nothing is being output?
How do I get the output from ConsoleWrite() to appear?
By Kevin Finnegan
Long time lurker and now forum poster! I'm writing a relatively simple backup script for my firm that automates the copy, compression and organization of Leaver's data on one of our secured NAS systems. I personally found the best method to do this so far was to use 7zG.exe (GUI version of 7Zip which can use command-line too) and it functions quite well!
I would like to retrieve more info on whether any warnings or errors happen in 7Zip during the backup, but I can't quite get my head around the syntax and switches for reading out, it seems any adjustment I make to the RunWait call's string seems to break the backup or give unexpected repercussions! Hopefully its something silly I'm doing as I don't code very often.
Here is the working version:
; Compress the directories one by one in the zip using the listfile.... Local $iPID = RunWait(@ScriptDir & "\bin\7zG.exe a -mx" & $compressionQuality & " -v" & $compressSplitFileSize & " -wc:\temp " _ & $backupToLocation & "\" & $userDirectory & ".7z @bin\listfile.txt -x@bin\excludefile.txt", "", @SW_SHOWDEFAULT, $STDOUT_CHILD) Ultimately I would love to switch entirely to 7za.exe (standalone) so that I can read the progress percentage, current file being uploaded and any warnings or errors could be processed and output to the AutoIT script's GUI I've created rather than jumping in and out of two applications per se.
While programming I often use ConsoleWrite() for debugging. If the script isn’t to big I often don’t do extra logging but let my ConsoleWrite()’s inside. Sometimes difficulties appear later when @compiled and weeks are gone. So my first thought often is let’s run the script and catch the console outs of my script. So I coded a console reader.
There are two ways to start the buggy script. First via $cmdline send to the reader and second with drag’n’drop onto the readers gui.
#include <AutoItConstants.au3> #include <WindowsConstants.au3> #include <EditConstants.au3> #include <GUIConstantsEx.au3> #include <MsgBoxConstants.au3> #include <ColorConstants.au3> #include <StaticConstants.au3> #include <array.au3> #include <WinAPIProc.au3> #include <GuiEdit.au3> #include <GuiRichEdit.au3> Opt("GUIOnEventMode", 1) Global $data = "" Global $g_aPID =  Global $g_bFreeze = False Global $g_iZaehler = 0 Global $g_hGUI = GUICreate("Console: StdoutRead" , 800, 800, -1, -1, $WS_OVERLAPPEDWINDOW + $WS_CLIPCHILDREN, $WS_EX_ACCEPTFILES) GUISetOnEvent($GUI_EVENT_CLOSE, "_Exit") Global $text = GUICtrlCreateEdit("",10,30,780,760, $ES_AUTOVSCROLL + $WS_VSCROLL + $ES_READONLY + $ES_NOHIDESEL) GUICtrlSetState(-1, $GUI_DROPACCEPTED); + $GUI_FOCUS) GUICtrlSetFont(-1, 9, -1, -1, "Lucida Console") GUICtrlSetResizing(-1, $GUI_DOCKBORDERS) GUISetOnEvent($GUI_EVENT_DROPPED, "_Dropped") _GUICtrlEdit_SetLimitText($text, 8388608) ; a filesize about 1mb Global $g_LaZeilen = GUICtrlCreateLabel("Zeilen: " & StringFormat("% 5d", $g_iZaehler), 680, 10, 100, 9, $SS_LEFTNOWORDWRAP, $WS_EX_LAYERED) GUICtrlSetFont(-1, 9, -1, -1, "Lucida Console") GUICtrlSetResizing(-1, $GUI_DOCKRIGHT + $GUI_DOCKTOP + $GUI_DOCKSIZE) Global $g_hCbFreeze = GUICtrlCreateCheckbox("&Freeze", 13, 5, 90) GUICtrlSetFont(-1, 9, -1, -1, "Lucida Console") GUICtrlSetResizing(-1, $GUI_DOCKALL) GUICtrlSetOnEvent($g_hCbFreeze, "_Freeze") Global $g_hBuCopy = GUICtrlCreateButton("&Copy All", 125, 5, 70, 20) GUICtrlSetFont(-1, 9, -1, -1, "Lucida Console") GUICtrlSetResizing(-1, $GUI_DOCKALL) GUICtrlSetOnEvent($g_hBuCopy, "_Copy") GUISetState(@SW_SHOW) If $CmdLine > 0 Then _ViaCmdline() _GUICtrlEdit_AppendText($text, $CmdLine & @CRLF) EndIf Global $sText = StringFormat("% 5d", $g_iZaehler) & @TAB _GUICtrlEdit_AppendText($text, $sText) Local $nextline While 1 If $g_aPID > 0 Then $nextline = _ConsoleReadLine() $nextline = StringReplace($nextline, @CRLF, @CRLF & StringFormat("% 5d", $g_iZaehler) & @TAB) $sText = $nextline If $g_bFreeze = False Then _GUICtrlEdit_AppendText($text, $sText) EndIf GUICtrlSetData($g_LaZeilen, "Zeilen: " & StringFormat("% 5d", $g_iZaehler)) EndIf _ProcessExist() WEnd #region - Funcs Func _ConsoleReadLine() Local $Result,$crPos While True _ProcessExist() For $i = 1 To $g_aPID $data &= StdoutRead($g_aPID[$i]) If @error Then ExitLoop Next $crPos = StringInStr($data, @CRLF) If $crPos Then $Result = StringLeft($data, $crPos) & @CRLF $data = StringRight($data, StringLen($data) - $crPos) $g_iZaehler += 1 Return $Result EndIf WEnd Return SetError(1, 1, $data) EndFunc Func _Dropped() Local $hPID = Run(@GUI_DragFile, "", Default, $STDERR_MERGED) ConsoleWrite("DROP: " & $hPID & " " & @GUI_DragFile & @CRLF) _ArrayAdd($g_aPID, $hPID) $g_aPID = UBound($g_aPID) - 1 EndFunc Func _ViaCmdline() Local $hPID = Run($CmdLine, "", Default, $STDERR_MERGED) ConsoleWrite("CMDLINE: " & $hPID & " " & $CmdLine & @CRLF) _ArrayAdd($g_aPID, $hPID) $g_aPID = UBound($g_aPID) - 1 EndFunc Func _Freeze() $g_bFreeze = Not $g_bFreeze ConsoleWrite("FREEZE: " & $g_bFreeze & @CRLF) GUICtrlSetState($text, $GUI_FOCUS) EndFunc Func _Copy() ConsoleWrite("COPY" & @CRLF) ClipPut(GUICtrlRead($text)) EndFunc Func _ProcessExist() For $i = $g_aPID To 1 Step - 1 If Not ProcessExists($g_aPID[$i]) Then ConsoleWrite("GONE: " & $g_aPID[$i] & @CRLF) _ArrayDelete($g_aPID, $i) $g_aPID = UBound($g_aPID) - 1 EndIf Next EndFunc Func _Exit() If $CmdLine = 0 Then ; if reader is started by $cmdline then no script will exit but reader For $i = 1 To $g_aPID ConsoleWrite("KILL: " & $g_aPID[$i] & " " & _WinAPI_GetProcessFileName($g_aPID[$i]) & @CRLF) ProcessClose($g_aPID[$i]) Next EndIf ConsoleWrite("EXIT" & @CRLF) Exit EndFunc #endregion Funcs Maybe someone will find it useful too.
One last remark. If only one script is given via $cmdline to the reader no scripts will exit if consolereader exits. But otherwise all scripts dropped onto the readers gui will exit too. This is by design. If you want to change this do it inside func _exit().
P.S. Possibly some #includes are not necessary anymore but have been while scripting.
I've written several scripts with the following sequence:
Execute a program using Run w/stdout+stderr captured Typically processes all the files in one directory tree to populate a second tree Execute a second program (also with Run) to monitor the products of the first program and Display a progress bar (percentage of output files complete) Also monitor the first program's process and exit when it terminates The script then calls ProcessWaitClose (no timeout) on the first program's process and Checks the first program's results Kills the monitor program if it hasn't already exited on its own. Sometimes, ProcessWaitClose returns 1 with @error = 0 and @extended = 0xCCCCCCCC (actually, 0xFFFFFFFFCCCCCCCC), which seems ambiguous: the documentation says that @error = non-zero and @extended = 0xCC... means an invalid PID (unclear what the return value is), and 1 is returned for non-existent processes (but no mention of @extended). The 1/0/0xCC... result seems to occur when the first program exits very quickly (with or without an error). Since the exit value is not available, the script scans the program's output and tries to determine whether it ran successfully. This has gotten complicated and unreliable.
I've now implemented a much simpler approach that works for most cases:
Modify the monitor program so that it ignores the other program's process (the monitor always gets killed by the script anyway) Execute the monitor program first using Run, then execute the processing program with RunWait When RunWait returns, the child process exit value is available, so the script can ignore its output (which isn't available anyway) If the monitor program is still running, kill it. Remaining Issue
However, there are still a couple of cases where it's necessary to get both the exit value from the processing program and its output. Since RunWait doesn't capture stdout and stderr for the parent script, it's looking like I'll have to call RunWait and redirect the 2 streams to a temp file and then scan it. Also, to do the redirect, I think I'll have to use @ComSpec to execute the processing program, which adds an undesired layer.
Does anybody have a better (cleaner) way to handle these cases?