How should I check if a path is in the PATH environment variable?

On Sat, 12 Feb 2005 11:26:34 +0200, "BigMan" <(E-Mail Removed)> wrote:

>How should I check if a path is in the PATH environment variable?
>

See tip 4263 in the 'Tips & Tricks' at http://www.jsiinc.com

Jerold Schulman
Windows Server MVP
JSI, Inc.
http://www.jsiinc.com

BigMan wrote:
> How should I check if a path is in the PATH environment variable?
>
To first check and then append a path given as argument.

::Add2Path.bat:::::::::::::::::::::::::::::::::::::::::::::::::::::::::
@echo off
echo.%path%|find /C /I "%1">NUL
if errorlevel 1 set Path=%Path%;%1
::Add2Path.bat:::::::::::::::::::::::::::::::::::::::::::::::::::::::::

Or from commandline:
@echo.%path%|find /C /I "c:\newpath" >NUL ||set path=%path%;c:\newpath

HTH

--
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Matthias
---------+---------+---------+---------+---------+---------+---------+

"Matthias Tacke" <(E-Mail Removed)> wrote:

> BigMan wrote:
> > How should I check if a path is in the PATH environment variable?
> >
> To first check and then append a path given as argument.
>
> ::Add2Path.bat:::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> @echo off
> echo.%path%|find /C /I "%1">NUL

That's to silly?! The following is correct, but too clumsy for me:

echo.^;%path%^;|find /C /I ";%1;">NUL

So: Why not use

For %! In (%PATH%) Do If "%!" == "%1" Set ...

> if errorlevel 1 set Path=%Path%;%1
> ::Add2Path.bat:::::::::::::::::::::::::::::::::::::::::::::::::::::::::

Stefan
[
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> So: Why not use
>
> For %! In (%PATH%) Do If "%!" == "%1" Set ...
>
I think this does not work...

BigMan wrote:
>>So: Why not use
>>
>>For %! In (%PATH%) Do If "%!" == "%1" Set ...
>>
> I think this does not work...

It does work, except for paths containing spaces.

--
Gruesse Greetings Saludos Saluti Salutations
Matthias
---------+---------+---------+---------+---------+---------+---------+

OK, please give the source of a bat file that writes every path in PATH to
the screen...

BigMan wrote:
> OK, please give the source of a bat file that writes every path in PATH to
> the screen...
>
>
commandline:
for %A in ("%path:;=";"%") do @echo %~A

Batch:
for %%A in ("%path:;=";"%") do @echo %%~A

--
Gruesse Greetings Saludos Saluti Salutations
Matthias
---------+---------+---------+---------+---------+---------+---------+

Wow!
Could you explain this: "%path:;=";"%"

BigMan wrote:
> Wow!
> Could you explain this: "%path:;=";"%"
>
>
The standard for has the space "," and the ";" as standard delmiters.
(at least - may be locale dependant)
If there are spaces in any of the folders in the path, for will
break at that point. To avoid this I quote every single path by
replacing all simicolons with quote semicolon quote plus quotes
at the begin and end resulting in proper parsed output.

See:
for /?
set /?
for details on handling environment vars.

--
Gruesse Greetings Saludos Saluti Salutations
Matthias
---------+---------+---------+---------+---------+---------+---------+