Existe-t-il une commande pour rafraîchir les variables d'environnement depuis l'invite de commandes sous Windows ?

Windows Client (10, 11, 12) Performance & Dépannage
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Existe-t-il une commande pour rafraîchir les variables d’environnement depuis l’invite de commandes sous Windows ?

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Vous pouvez capturer les variables d’environnement système avec un script VBS, but you need a bat script to actually change the current environment variables, so this is a combined solution.

Create a file named resetvars.vbs containing this code, and save it on the path:

`Set oShell = WScript.CreateObject(“WScript.Shell”)
filename = oShell.ExpandEnvironmentStrings(“%TEMP%\resetvars.bat”)
Set objFileSystem = CreateObject(“Scripting.fileSystemObject”)
Set oFile = objFileSystem.CreateTextFile(filename, TRUE)

set oEnv=oShell.Environment(“System”)
for each sitem in oEnv
oFile.WriteLine("SET " & sitem)
next
path = oEnv(“PATH”)

set oEnv=oShell.Environment(“User”)
for each sitem in oEnv
oFile.WriteLine("SET " & sitem)
next

path = path & “;” & oEnv(“PATH”)
oFile.WriteLine(“SET PATH=” & path)
oFile.Close


create another file name resetvars.bat containing this code, same location:

`@echo off
%~dp0resetvars.vbs
call "%TEMP%\resetvars.bat"

When you want to refresh the environment variables, just run resetvars.bat

Apologetics:

The two main problems I had coming up with this solution were

a. I couldn’t find a straightforward way to export environment variables from a vbs script back to the command prompt, and

b. the PATH environment variable is a concatenation of the user and the system PATH variables.

I’m not sure what the general rule is for conflicting variables between user and system, so I elected to make user override system, except in the PATH variable which is handled specifically.

I use the weird vbs+bat+temporary bat mechanism to work around the problem of exporting variables from vbs.

Note: this script does not delete variables.

This can probably be improved.

ADDED

If you need to export the environment from one cmd window to another, use this script (let’s call it exportvars.vbs):

`Set oShell = WScript.CreateObject(“WScript.Shell”)
filename = oShell.ExpandEnvironmentStrings(“%TEMP%\resetvars.bat”)
Set objFileSystem = C

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