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michaelslamet

Compiled script doing self update on network share, IMPOSSIBLE?

7 posts in this topic

I'm not sure if this possible, but who knows that I'm over thinking (again):

I have a compiled script that I put on network share folder (it's stored at FreeBSD machine with SMB protocol).

This script is accessible by many  users on many machines that connected to the LAN.

When the script run, how can it know how many instance is it running on all of those machines?

I dont need to know who and which machine is running it, but I need to know is there more than 1 instance

running it now (on whichever machine, I dont care)?

In other word, this script would like to know, is it in used (openned/executed by any machines) except by himself right now?

I'm asking this because I would like to do self update, and I cant do it when there is a user access/execute it.

Something like:

If NOT _FileInUsed(@ScriptFullPath) then
     _self_update()
Endif

 

IMPOSSIBLE?

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#2 ·  Posted (edited)

Maybe you could add an ini file with some sections. When the script starts up, it modifies the ini the following way:

[USER_1]
Active=1

Every user should have his own script (or at least you could provide another ini file with the username of the computer, so you don't have to recompile it 200 times).

Before the script stopped, you could write it again:

[USER_1]
Active=0

So, on the main server you can check if everyones script is closed, or maybe you can add a global disable function while updating.

[ It's not exactly the same as you told, but a bypass way :) ]

Edited by Unc3nZureD

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#3 ·  Posted (edited)

let's split it into two subjects, shall we.

1) the part of knowing who is running your script is actually very easy.

make sure your script is able to write to a share on the BSD machine.

add a beginning line to your script, which creates a file in that share, that file name is the hostname of the machine running the script. the content of the file is not important, can be empty file.

add an ending line to your script, deleting the same file.

you get the idea, yeah? the point is that you have a list of files, indicating the current machines using the script. if no files exist, then no-one is using your script. you can modify the concept as you see fit.

 

2) the part of self update is even easier:

the script is located only on the server, right? so you have just one place to update, and you can update only when there are no files as described above.

so write an updater script, that loops a files check until no files exist, then replaces the existing script with the new version.

 

edit: damn, i just paused writing the post to pet the cat... he beat me to it

Edited by orbs

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#4 ·  Posted (edited)

If NOT _FileInUsed(@ScriptFullPath) then
     _self_update()
Endif

I do something like that

but

1. You must separate updater.exe

2. You must close mainprogram.exe on your machine

3. updater.exe now can check _FileInUsed(mainprogram.exe)

Edited by mlipok

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You may not be able to delete or overwrite a executable file in use, but you can move it. And so the main concern is not the processes of the file but of the file itself.

This is a simple example of how you can do an update when the main script sees the update file and then does the moving while the main script is still running. More comments are with the example.

#cs Information about this self update example
    Known files in example are Self.old, Self.exe and Self.new
    Self.exe is the current file to be used
    Self.old is the old version that is deleted when not in use
    Self.new is the new version to be replace the current version in same directory when detected
    Self.lock is a flag file to help prevent other scripts trying to do the update at the same time
    To test:
        Compile script to Self.exe and place in the shared folder
        Run Self.exe in the shared folder
        Compile update script to Self.exe and rename to Self.new
        Place Self.new in the shared folder
        Run Self.exe again and it should detect Self.new and do the FileMoving in _SelfUpdate()
        Run Self.exe again and you may be running the new version of Self.exe
    Note:
        Self.old will be deleted when file in use does not exist and done when Self.exe is initially executed
        Self.exe will be updated when Self.new is detected and when Self.old can be created or overwritten
        Shared folder can be a local folder
#ce

#OnAutoItStartRegister "_SelfUpdate"

MsgBox(0, @ScriptName, 'Version 1.0')

Func _SelfUpdate()
    Local $message
    ; remove old file if able
    If FileExists(@ScriptDir & '\Self.old') And FileDelete(@ScriptDir & '\Self.old') Then
        $message &= 'Deleted ' & @ScriptDir & '\Self.old' & @CRLF
    EndIf
    ; update to new file if able
    If FileExists(@ScriptDir & '\Self.new') And Not FileExists(@ScriptDir & '\Self.lock') Then
        $message &= @ScriptDir & '\Self.new found' & @CRLF
        ; create a lock file, actually a flag file to alert other scripts to let me do this
        If FileWriteLine(@ScriptDir & '\Self.lock', 'I am updating') Then
            ; exe to old
            If FileMove(@ScriptFullPath, @ScriptDir & '\Self.old', 1) Then
                $message &= 'Moved ' & @ScriptFullPath & ' to ' & @ScriptDir & '\Self.old' & @CRLF
                ; new to exe
                If FileMove(@ScriptDir & '\Self.new', @ScriptDir & '\Self.exe') Then
                    $message &= 'Moved ' & @ScriptDir & '\Self.new to ' & @ScriptDir & '\Self.exe' & @CRLF
                    $message &= @CRLF & 'Update may be available on next execution of Self.exe'
                Else
                    ; recover if failed
                    FileMove(@ScriptDir & '\Self.old', @ScriptDir & '\Self.exe')
                    $message &= 'Recovered ' & @ScriptDir & '\Self.old to ' & @ScriptDir & '\Self.exe'
                EndIf           
            EndIf
            FileDelete(@ScriptDir & '\Self.lock')
        EndIf
    EndIf
    If $message Then MsgBox(0, @ScriptName, $message)
EndFunc
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I use this funtion to update the script

Func _selfUpdate($delay = 0)
    If Not @Compiled Then Return -1
    Local $tmpBatFH, $internetDelay = 2, $appID = @ScriptName, $SDATA, $SDELAY = "IF %TIMER% GTR " & $delay & " GOTO DELETE", $SFILENAME = @ScriptName, $SIMAGENAME = "IMAGENAME"
    Local $scriptPath = FileGetShortName(@ScriptFullPath)
    Local $REMOTEPATH = "m:\DATEN\common\"
;~  Local $localPath = @ScriptDir & "\"
    Local $scriptName = @ScriptName
    Local $remoteVersion = FileGetVersion($REMOTEPATH & $scriptName)
    Local $localVersion = FileGetVersion(@ScriptFullPath)
    If _VersionCompare($remoteVersion, $localVersion) = 1 Then
        FileCopy($REMOTEPATH & $scriptName, @ScriptFullPath & ".new")
        $SDATA = 'SET TIMER=0' & @CRLF _
                 & ':START' & @CRLF _
                 & 'PING -n ' & $internetDelay & ' 127.0.0.1 > nul' & @CRLF _
                 & $SDELAY & @CRLF _
                 & 'SET /A TIMER+=1' & @CRLF _
                 & @CRLF _
                 & 'TASKLIST /NH /FI "' & $SIMAGENAME & ' EQ ' & $appID & '" | FIND /I "' & $appID & '" >nul && GOTO START' & @CRLF _
                 & 'GOTO DELETE' & @CRLF _
                 & @CRLF _
                 & ':DELETE' & @CRLF _
                 & 'TASKKILL /F /FI "' & $SIMAGENAME & ' EQ ' & $appID & '"' & @CRLF _
                 & 'DEL "' & $scriptPath & '"' & @CRLF _
                 & 'IF EXIST "' & $scriptPath & '" GOTO DELETE' & @CRLF _
                 & @CRLF & 'MOVE "' & @ScriptFullPath & '.new" "' & @ScriptFullPath & '"' & @CRLF _
                 & 'CALL "' & @ScriptFullPath & '" UPDATE' & @CRLF _
                 & 'GOTO END' & @CRLF _
                 & @CRLF _
                 & ':END' & @CRLF _
                 & 'DEL "' & @TempDir & "\" & $SFILENAME & ".bat" & '"' & @CRLF _
                 & 'exit'

        $tmpBatFH = FileOpen(@TempDir & "\" & $SFILENAME & ".bat", 2)
        If $tmpBatFH = -1 Then
            Return SetError(2, 0, 0)
        EndIf
        FileWrite($tmpBatFH, $SDATA)
        FileClose($tmpBatFH)
        Return Run(@TempDir & "\" & $SFILENAME & ".bat", @TempDir, @SW_HIDE)
    EndIf
EndFunc   ;==>_selfUpdate

Scripts & functions Organize Includes Let Scite organize the include files

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LoginWrapper Secure scripts by adding a query (authentication)

_RunOnlyOnThis UDF Make sure that a script can only be executed on ... (Windows / HD / ...)

Internet-Café Server/Client Application Open CD, Start Browser, Lock remote client, etc.

MultipleFuncsWithOneHotkey Start different funcs by hitting one hotkey different times

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Unc3nZureD, orbs, mlipok, MHz, Xenobiologist,

Thank you thank you thank you for all of your replies, ideas and suggestions.

I think i will go with MHz ideas and samples, it looks very promising.

I'm going to mark it as solved. Thanks again :)

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