China DOS Union

The answer is in post #9

[ Last edited by tireless on 2008-5-26 at 06:40 PM ]

It should work inside the script, but after the script closes it won't work the next time. You could try writing to the registry...

Originally posted by HAT at 2008-1-2 12:54 AM:
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /v Path /t REG_EXPAND_SZ /d "%path%;c:\test" /f

I had tried this before, but it doesn't take effect immediately.

[ Last edited by tireless on 2009-7-11 at 06:18 ]

Use call or start to create a new process

Originally posted by tireless at 2008-1-2 21:12:



I had tried this before, but it doesn't take effect immediately. If I enter set at the command line, I still can't see any change...

You probably need to restart cmd. If that doesn't work, restart explorer.exe. If that still doesn't work, restart computer.^_^

I haven't tried the registry method. This is how I use it.
http://www.cn-dos.net/forum/viewthread.php?tid=28204&fpage=1&highlight=%2Beverest79

wmic takes effect directly after modification

ENVIRONMENT - system environment settings management
::get the temp environment variable
wmic ENVIRONMENT where "name='temp'" get UserName,VariableValue
::change the value of the path environment variable, add e:\tools
wmic ENVIRONMENT where "name='path' and username='<system>'" set VariableValue="%path%;e:\tools"
::add the system environment variable home, value %HOMEDRIVE%%HOMEPATH%
wmic ENVIRONMENT create name="home",username="<system>",VariableValue="%HOMEDRIVE%%HOMEPATH%"
::delete the home environment variable
wmic ENVIRONMENT where "name='home'" delete

::change the value of the path environment variable, add e:\tools
wmic ENVIRONMENT where "name='path' and username='<system>'" set VariableValue="%path%;e:\tools"

It seems the ; should be removed. If you don't remove it, there will be two ; after the modification.

Originally posted by tireless at 2008-5-27 01:36 PM:


It seems the ; should be removed. If you don't remove it, there will be two ; after the modification.

That depends on whether your %path% ends with a semicolon before the modification.
I suggest not removing this semicolon.
One extra semicolon doesn't matter.
But if one is missing, it will cause an error.

@post #11
No, my path does not end with a semicolon, and a semicolon gets added automatically when it is modified. Why don't you try it

[ Last edited by tireless on 2008-5-26 at 06:13 PM ]

I tested it. Even if there is a semicolon in the wmic command, it still won't result in two semicolons in path.

Environment:
XP SP2 EN
path ends with a semicolon

OK, learned something new!

Really good, lots of colorful answers.