Merge branch 'main' of https://gitea.elpatron.me/elpatron/Install-Beszel-Agent

.gitignore

@@ -0,0 +1,2 @@
+/*.pdf
+/*.zip

README.md

@@ -1,21 +1,95 @@
-# Install Beszel Agent As Service Under Windows
+# BeszelWin
 
-The Windows *cmd* file `install-beszel-service.cmd` installs the [Beszel](https://beszel.dev) agent as a service under Microsoft Windows.
+A collection of four scripts to build, install, update or uninstall the [Beszel](https://beszel.dev) agent under Microsoft Windows, inspired by [*Using Beszel to monitor Windows*](https://blog.ktz.me/using-beszel-to-monitor-windows/) by Alex Kretschmar.
 
-## Usage
+## (1) Building the executable
 
-Open a `cmd.exe` shell with administrative rights.
+### Prerequisites
+
+- Microsoft Windows 10 or later **Client** OS (64 bit)
+
+*Building under Windows Server OS should be working, but you have to install Go and Git manually as Winget is not available for Windows server operating systems.*
+
+### Compiling
+
+Download and extract [install-beszel-service.zip](https://gitea.elpatron.me/elpatron/Install-Beszel-Agent/releases/download/1.0/install-beszel-service.zip).
+
+Open a `cmd.exe` shell, `cd` into the script directory (where you extracted the archive) and start the build-script:
+
+```
+.\build_agent.cmd
+```
+
+The script will install *Git* and *Go* (if not yet installed) with *Winget*, clone the *Beszel* repository and build a Windows 64 bit `agent.exe` binary.
+
+## (2) Installing the service
+
+### Prerequisites
+
+- Microsoft Windows 10 or later - *Server OS should work, too*
+
+### Installation
+
+Download and extract [install-beszel-service.zip](https://gitea.elpatron.me/elpatron/Install-Beszel-Agent/releases/download/1.0/install-beszel-service.zip) if you haven´t done this in before.
+
+Open a `cmd.exe` shell with **administrative rights** and `cd` into the script directory (where you extracted the archive).
+
+If you have built the agent by yourself: Copy your `agent.exe` binary to the directory where you extracted the scripts. Overwrite `agent.exe` from the archive.
+
+Example:
+
+```
+copy /y .\beszel\beszel\cmd\agent\agent.exe .
+```
+
+Start the installation script provided with your Beszel Ssh key:
 
 ````
-git clone https://gitea.elpatron.me/elpatron/Install-Beszel-Agent
-cd Install-Beszel-Agent
 .\install-beszel-service.cmd <your Beszel ssh key>
 ````
 
-## Explanation
+The script copies `agent.exe` into the directory `%ProgramFiles%\BeszelAgent` and takes usage of *[NSSM - the Non-Sucking Service Manager](https://nssm.cc/)* to install the service. If *NSSM* is not yet installed on your system, it will be downloaded and installed to the Beszel agent directory.
 
-The script copies `agent.exe` into the directory `%ProgramFiles%\BeszelAgent` and takes usage of *[NSSM - the Non-Sucking Service Manager](https://nssm.cc/)* to install the service. *NSSM* is being installed by *[Winget](https://github.com/microsoft/winget-cli)*.
+The provided `agent.exe` was compiled on January, 17th 2025 by me and should be exchanged by a self compiled or official executable, see *(1) Building the executable*.
-
-The provided `agent.exe` was compiled on January, 18th 2025 by me and should be exchanged by a self compiled or official executable.
 
 For more details, see [*Using Beszel to monitor Windows*](https://blog.ktz.me/using-beszel-to-monitor-windows/) by Alex Kretschmar.
+
+## (3) Updating the service
+
+### Prerequisites
+
+- To update the Beszel agent, it has to be installed using the install script.
+
+### Updating
+
+Download and extract [install-beszel-service.zip](https://gitea.elpatron.me/elpatron/Install-Beszel-Agent/releases/download/1.0/install-beszel-service.zip) if you haven´t done this before.
+
+Open a `cmd.exe` shell with **administrative rights** and `cd` into the script directory (where you extracted the archive).
+
+Start the update by launching
+
+```
+.\update_agent.cmd
+```
+
+The update will make a fresh clone of the Beszel GitHub repository, build the executable, stop the agent service, copy the new `agent.exe` to `%ProgramFiles%\BeszelAgent` and start the service.
+
+## (4) Uninstall the service
+
+### Prerequisites
+
+- To uninstall the Beszel agent, it has to be installed using the install script.
+
+### Uninstalling
+
+Download and extract [install-beszel-service.zip](https://gitea.elpatron.me/elpatron/Install-Beszel-Agent/releases/download/1.0/install-beszel-service.zip) if you haven´t done this before.
+
+Open a `cmd.exe` shell with **administrative rights**.
+
+Start the update by launching
+
+```
+.\uninstall_agent.cmd
+```
+
+The script will stop and remove the Beszel service and delete the installation directory `%ProgramFiles%\BeszelAgent`.

RefreshEnv.cmd

@@ -1,130 +0,0 @@
-:: Code generously provided by @beatcracker: https://github.com/beatcracker/detect-batch-subshell
-@echo off
-
-setlocal EnableDelayedExpansion
-
-:: Dequote path to command processor and this script path
-set ScriptPath=%~0
-set CmdPath=%COMSPEC:"=%
-
-:: Get command processor filename and filename with extension
-for %%c in (!CmdPath!) do (
-    set CmdExeName=%%~nxc
-    set CmdName=%%~nc
-)
-
-:: Get this process' PID
-:: Adapted from: http://www.dostips.com/forum/viewtopic.php?p=22675#p22675
-set "uid="
-for /l %%i in (1 1 128) do (
-    set /a "bit=!random!&1"
-    set "uid=!uid!!bit!"
-)
-
-for /f "tokens=2 delims==" %%i in (
-    'wmic Process WHERE "Name='!CmdExeName!' AND CommandLine LIKE '%%!uid!%%'" GET ParentProcessID /value'
-) do (
-    rem Get commandline of parent
-    for /f "tokens=1,2,*" %%j in (
-        'wmic Process WHERE "Handle='%%i'" GET CommandLine /value'
-    ) do (
-
-        rem Strip extra CR's from wmic output
-        rem http://www.dostips.com/forum/viewtopic.php?t=4266
-        for /f "delims=" %%x in ("%%l") do (
-            rem Dequote path to batch file, if any (3rd argument)
-            set ParentScriptPath=%%x
-            set ParentScriptPath=!ParentScriptPath:"=!
-        )
-
-        rem Get parent process path
-        for /f "tokens=2 delims==" %%y in ("%%j") do (
-            rem Dequote parent path
-            set ParentPath=%%y
-            set ParentPath=!ParentPath:"=!
-
-            rem Handle different invocations: C:\Windows\system32\cmd.exe , cmd.exe , cmd
-            for %%p in (!CmdPath! !CmdExeName! !CmdName!) do (
-                if !ParentPath!==%%p set IsCmdParent=1
-            )
-
-            rem Check if we're running in cmd.exe with /c switch and this script path as argument
-            if !IsCmdParent!==1 if %%k==/c if "!ParentScriptPath!"=="%ScriptPath%" set IsExternal=1
-        )
-    )
-)
-
-if !IsExternal!==1 (
-    echo %~nx0 does not work when run from this process. If you're in PowerShell, please 'Import-Module $env:ChocolateyInstall\helpers\chocolateyProfile.psm1' and try again.
-    exit 1
-)
-
-endlocal
-:: End code from @beatcracker
-@echo off
-::
-:: RefreshEnv.cmd
-::
-:: Batch file to read environment variables from registry and
-:: set session variables to these values.
-::
-:: With this batch file, there should be no need to reload command
-:: environment every time you want environment changes to propagate
-
-::echo "RefreshEnv.cmd only works from cmd.exe, please install the Chocolatey Profile to take advantage of refreshenv from PowerShell"
-echo | set /p dummy="Refreshing environment variables from registry for cmd.exe. Please wait..."
-
-goto main
-
-:: Set one environment variable from registry key
-:SetFromReg
-    "%WinDir%\System32\Reg" QUERY "%~1" /v "%~2" > "%TEMP%\_envset.tmp" 2>NUL
-    for /f "usebackq skip=2 tokens=2,*" %%A IN ("%TEMP%\_envset.tmp") do (
-        echo/set "%~3=%%B"
-    )
-    goto :EOF
-
-:: Get a list of environment variables from registry
-:GetRegEnv
-    "%WinDir%\System32\Reg" QUERY "%~1" > "%TEMP%\_envget.tmp"
-    for /f "usebackq skip=2" %%A IN ("%TEMP%\_envget.tmp") do (
-        if /I not "%%~A"=="Path" (
-            call :SetFromReg "%~1" "%%~A" "%%~A"
-        )
-    )
-    goto :EOF
-
-:main
-    echo/@echo off >"%TEMP%\_env.cmd"
-
-    :: Slowly generating final file
-    call :GetRegEnv "HKLM\System\CurrentControlSet\Control\Session Manager\Environment" >> "%TEMP%\_env.cmd"
-    call :GetRegEnv "HKCU\Environment">>"%TEMP%\_env.cmd" >> "%TEMP%\_env.cmd"
-
-    :: Special handling for PATH - mix both User and System
-    call :SetFromReg "HKLM\System\CurrentControlSet\Control\Session Manager\Environment" Path Path_HKLM >> "%TEMP%\_env.cmd"
-    call :SetFromReg "HKCU\Environment" Path Path_HKCU >> "%TEMP%\_env.cmd"
-
-    :: Caution: do not insert space-chars before >> redirection sign
-    echo/set "Path=%%Path_HKLM%%;%%Path_HKCU%%" >> "%TEMP%\_env.cmd"
-
-    :: Cleanup
-    del /f /q "%TEMP%\_envset.tmp" 2>nul
-    del /f /q "%TEMP%\_envget.tmp" 2>nul
-
-    :: capture user / architecture
-    SET "OriginalUserName=%USERNAME%"
-    SET "OriginalArchitecture=%PROCESSOR_ARCHITECTURE%"
-
-    :: Set these variables
-    call "%TEMP%\_env.cmd"
-
-    :: Cleanup
-    del /f /q "%TEMP%\_env.cmd" 2>nul
-
-    :: reset user / architecture
-    SET "USERNAME=%OriginalUserName%"
-    SET "PROCESSOR_ARCHITECTURE=%OriginalArchitecture%"
-
-    echo | set /p dummy="Finished."
-    echo .

build_agent.cmd

@@ -0,0 +1,51 @@
+@echo off
+cd /D "%~dp0"
+echo This script downloads the Beszel repository and builds the Beszel agent for Windows (64 Bit only).
+echo If not yet installed, Git and Go will be installed via Winget.
+echo.
+
+call env.cmd
+
+where winget.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Winget not found, install Winget or use a compatible OS: Win 10 Client OS or later
+	goto end
+) else (
+	echo Winget executable found
+)
+
+where go.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Installing Go with Winget
+	winget install GoLang.Go >nul 2>&1
+) else (
+	echo Go executable found
+)
+
+where git.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Installing Git with Winget
+	winget install Git.Git >nul 2>&1
+) else (
+	echo Git executable found
+)
+
+echo Cloning Beszel repository
+git clone https://github.com/henrygd/beszel.git >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Cloning the Beszel repository failed.
+	goto end
+)
+
+cd .\beszel\beszel\cmd\agent
+
+echo Building agent
+go build -ldflags "-w -s" . >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Something went wrong
+) else (
+	echo Build successful:
+	dir agent.exe
+)
+
+:end

env.cmd

@@ -0,0 +1,8 @@
+@echo off
+set SERVICENAME=BeszelAgent
+set DESTINATIONDIR=%ProgramFiles%\%SERVICENAME%
+set AGENTEXE=%DESTINATIONDIR%\agent.exe
+set NSSMEXE=nssm.exe
+set GOOS=windows
+set GOARCH=amd64
+set CGO_ENABLED=0

install-beszel-service.cmd

@@ -1,24 +1,35 @@
 @echo off
 cd /D "%~dp0"
+echo This script installs the Beszel agent for Windows.
+echo If not yet installed, NSSM will be installed via Winget.
+echo.
+
+echo Checking adminstrative rights
+rem from https://stackoverflow.com/questions/7985755/how-to-detect-if-cmd-is-running-as-administrator-has-elevated-privileges
+net session >nul 2>&1
+if %errorlevel% equ 0 (
+	echo Administrative rights check OK
+) else (
+	echo You are NOT Administrator. Start the script from an administrative cmd.exe shell...
+	goto end
+)
+
 if !%1==! goto help
 if !%2==! goto help
 
 set BESZELKEYPREFIX=%1
 set BESZELKEY=%2
-set SERVICENAME=BeszelAgent
+call env.cmd
-set DESTINATIONDIR=%ProgramFiles%\%SERVICENAME%
-set AGENTEXE=%DESTINATIONDIR%\agent.exe
-set NSSMEXE=nssm.exe
 
 where nssm.exe >nul 2>&1
-if %errorlevel%==1 goto installnssm
+if %errorlevel% NEQ 0 goto installnssm
 goto proceed
 
 :installnssm
 echo Downloading NSSM
 curl.exe --output "%TEMP%\nssm-2.24.zip" --url https://nssm.cc/release/nssm-2.24.zip >nul 2>&1
 echo Extracting ZIP file
-tar.exe -xf %TEMP%\nssm-2.24.zip
+tar.exe -xf %TEMP%\nssm-2.24.zip >nul 2>&1
 echo Copying nssm.exe to %DESTINATIONDIR%
 if %PROCESSOR_ARCHITECTURE%==AMD64 (
 	copy .\nssm-2.24\win64\nssm.exe "%DESTINATIONDIR%\" >nul 2>&1
@@ -31,27 +42,42 @@ del "%TEMP%\nssm-2.24.zip" >nul 2>&1
 rd /s/q .\nssm-2.24 >nul 2>&1
 
 :proceed
-echo Creating deirectory %DESTINATIONDIR%
+echo Creating directory %DESTINATIONDIR%
 md "%DESTINATIONDIR%" >nul 2>&1
 
-echo Copying agent.exe
+echo Copying agent.exe to %DESTINATIONDIR%
 copy .\agent.exe "%DESTINATIONDIR%\" >nul 2>&1
 
 echo Adding firewall rule
 netsh advfirewall firewall add rule name="%SERVICENAME%" dir=in action=allow program="%AGENTEXE%" enable=yes >nul 2>&1
 
-echo Installing service
+echo Installing service %SERVICENAME%
 %NSSMEXE% install %SERVICENAME% "%AGENTEXE%" >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Failed to install the service.
+	goto end
+)
+
+echo Setting environment for %SERVICENAME%
 %NSSMEXE% set %SERVICENAME% AppEnvironmentExtra "KEY=%BESZELKEYPREFIX% %BESZELKEY%" >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Failed to set the service environment.
+	goto end
+)
 
-echo Setting environment for service
+echo Starting %SERVICENAME%
 %NSSMEXE% start %SERVICENAME% >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Failed to start service.
+	goto end
+)
 
-echo Service installed, status:
+echo Dumping service state
 %NSSMEXE% dump %SERVICENAME%
 goto end
 
 :help
 echo You have to provide a Beszel ssh key, e.g. 'install-beszel-service.cmd ssh-ed25519 AAAAC3L3lIpn94iu2TIpdmneXsEC1TDvrg4HCNoM1aiC683WMZfGOVoatrJSkysaQB9K
 echo The key must not be enclosed in "" or '', just copy and paste it as it is.
+
 :end

uninstall_agent.cmd

@@ -0,0 +1,29 @@
+@echo off
+setlocal
+cd /D "%~dp0"
+echo This script uninstalls the Beszel agent
+echo.
+
+call env.cmd
+
+echo Checking adminstrative rights
+rem from https://stackoverflow.com/questions/7985755/how-to-detect-if-cmd-is-running-as-administrator-has-elevated-privileges
+net session >nul 2>&1
+if %errorlevel% equ 0 (
+	echo Administrative rights check OK
+) else (
+	echo You are NOT Administrator. Start the script from an administrative cmd.exe shell...
+	goto end
+)
+
+echo Stopping Beszel agent service
+%NSSMEXE% stop %SERVICENAME% >nul 2>&1
+
+echo Removing Beszel agent service
+%NSSMEXE% remove %SERVICENAME% >nul 2>&1
+
+echo Deleting installation directory
+rd /q/s %DESTINATIONDIR% >nul 2>&1
+
+:end
+ech Done.

update_agent.cmd

@@ -0,0 +1,97 @@
+@echo off
+setlocal
+cd /D "%~dp0"
+echo This script updates the Beszel agent to the latest version from the Github repository
+echo.
+
+echo Checking adminstrative rights
+rem from https://stackoverflow.com/questions/7985755/how-to-detect-if-cmd-is-running-as-administrator-has-elevated-privileges
+net session >nul 2>&1
+if %errorlevel% equ 0 (
+	echo Administrative rights check OK
+) else (
+	echo You are NOT Administrator. Start the script from an administrative cmd.exe shell...
+	goto end
+)
+
+call env.cmd
+
+where winget.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Winget not found, install Winget or use a compatible OS: Win 10 Client OS or later
+	goto end
+) else (
+	echo Winget executable found
+)
+
+where go.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Installing Go with Winget
+	winget install GoLang.Go >nul 2>&1
+) else (
+	echo Go executable found
+)
+
+where git.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Installing Git with Winget
+	winget install Git.Git >nul 2>&1
+) else (
+	echo Git executable found
+)
+
+if exist .\beszel (
+	echo Subdirectory beszel already exists, it has to be deleted.
+	echo   - Hit Crtl+c to exit if you don't want the directory to be deleted.
+	echo   - Hit any other key to continue
+	pause  >nul 2>&1
+	echo Deleting beszel subdirectory
+	rd /q/s .\beszel >nul 2>&1
+)
+
+:proceed
+echo Cloning Beszel repository from Github
+git clone https://github.com/henrygd/beszel.git >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Cloning repository failed.
+	goto end
+)
+
+cd .\beszel\beszel\cmd\agent
+
+echo Building agent
+set GOOS=windows
+set GOARCH=amd64
+set CGO_ENABLED=0
+go build -ldflags "-w -s" . >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Something went wrong
+	goto end
+) else (
+	echo Build successful
+)
+
+cd /D "%~dp0"
+
+echo Stopping Beszel agent service
+net stop %SERVICENAME% >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Failed to stop Beszel agent service
+	goto end
+)
+
+echo Copying new agent
+copy .\beszel\beszel\cmd\agent\agent.exe %AGENTEXE% >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Failed to copy agent.exe
+)
+
+echo Starting Beszel agent service
+net start %SERVICENAME% >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Failed to start Beszel agent service
+	goto end
+)
+
+:end
+endlocal