Why is an enviroment variable not updated correctly in a for loop.

  • Thread starter Thread starter Buddy Lott
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Buddy Lott

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If I run the following script in a directory with two files named test1.txt &
test2.txt, FILELIST should have the value of "Test2.txt;Test1.txt;NOFILES".
Instead it has the value of "Test2.Txt;NOFILES". Can any one tell me why? Or
how to get it to work correctly?

@SET FILELIST=NOFILES
@for %%f in (*.txt) do @(
@echo %%f
@set FILELIST= %%f;%FILELIST%
@echo %FILELIST%
)

Thanks,
 
Re: Why is an enviroment variable not updated correctly in a for loop.


"Buddy Lott" <BuddyLott@discussions.microsoft.com> wrote in message
news:94460634-69B5-4DAF-B70A-D0D89DA358CF@microsoft.com...
> If I run the following script in a directory with two files named
> test1.txt &
> test2.txt, FILELIST should have the value of
> "Test2.txt;Test1.txt;NOFILES".
> Instead it has the value of "Test2.Txt;NOFILES". Can any one tell me why?
> Or
> how to get it to work correctly?
>
> @SET FILELIST=NOFILES
> @for %%f in (*.txt) do @(
> @echo %%f
> @set FILELIST= %%f;%FILELIST%
> @echo %FILELIST%
> )
>
> Thanks,
>

Try this instead:

@echo off
SetLocal EnableDelayedExpansion
SET FILELIST=NOFILES
for %%f in (*.txt) do (
echo %%f
set FILELIST= %%f;!FILELIST!
echo !FILELIST!
)

Run set /? from a Command Prompt to find out more
about delayed expansion.
 
Re: Why is an enviroment variable not updated correctly in a for loop.


"Buddy Lott" <BuddyLott@discussions.microsoft.com> wrote in message
news:94460634-69B5-4DAF-B70A-D0D89DA358CF@microsoft.com...
> If I run the following script in a directory with two files named
> test1.txt &
> test2.txt, FILELIST should have the value of
> "Test2.txt;Test1.txt;NOFILES".
> Instead it has the value of "Test2.Txt;NOFILES". Can any one tell me why?
> Or
> how to get it to work correctly?
>
> @SET FILELIST=NOFILES
> @for %%f in (*.txt) do @(
> @echo %%f
> @set FILELIST= %%f;%FILELIST%
> @echo %FILELIST%
> )
>
> Thanks,
>

Sorry, I meant

for /?

at the Command Prompt.
 
Re: Why is an enviroment variable not updated correctly in a for l

Re: Why is an enviroment variable not updated correctly in a for l

The case I posted works using the SetLocal EnableDelayedExpansion.... but it
doesn't seem to work for this case. Why?

SetLocal EnableDelayedExpansion
@FOR /R %%f IN (*.cpp *.c) DO (

if exist "%%~nf.lnt". SET FILE_SPECIFIC_CONFIG="%%~pf%%~nf.lnt".
if exist "%~p1\pclint.lnt". SET DIR_SPECIFIC="%~p1\pclint.lnt".
lint-nt "-os(%%~pf%%~nf.lint)" %LINT_INCLUDE% !DIR_SPECIFIC!
!FILE_SPECIFIC_CONFIG! u:\Projects\BAC\B_BC\sw\BC.lnt -u %%f
)

"Pegasus (MVP)" wrote:

>
> "Buddy Lott" <BuddyLott@discussions.microsoft.com> wrote in message
> news:94460634-69B5-4DAF-B70A-D0D89DA358CF@microsoft.com...
> > If I run the following script in a directory with two files named
> > test1.txt &
> > test2.txt, FILELIST should have the value of
> > "Test2.txt;Test1.txt;NOFILES".
> > Instead it has the value of "Test2.Txt;NOFILES". Can any one tell me why?
> > Or
> > how to get it to work correctly?
> >
> > @SET FILELIST=NOFILES
> > @for %%f in (*.txt) do @(
> > @echo %%f
> > @set FILELIST= %%f;%FILELIST%
> > @echo %FILELIST%
> > )
> >
> > Thanks,
> >
>
> Sorry, I meant
>
> for /?
>
> at the Command Prompt.
>
>
>
 
Re: Why is an enviroment variable not updated correctly in a for l

Re: Why is an enviroment variable not updated correctly in a for l

I don't think that the syntax FOR /R %%f IN (*.cpp *.c) DO
is a valid use of wild cards. Since your batch files are quite
advanced, I recommend that you post your questions here:

alt.msdos.batch.nt

They love to dig their teeth into this sort of thing!


"Buddy Lott" <BuddyLott@discussions.microsoft.com> wrote in message
news:9EC548CF-C42A-4E89-BAFF-BA534BE56F99@microsoft.com...
> The case I posted works using the SetLocal EnableDelayedExpansion.... but
> it
> doesn't seem to work for this case. Why?
>
> SetLocal EnableDelayedExpansion
> @FOR /R %%f IN (*.cpp *.c) DO (
>
> if exist "%%~nf.lnt". SET FILE_SPECIFIC_CONFIG="%%~pf%%~nf.lnt".
> if exist "%~p1\pclint.lnt". SET
> DIR_SPECIFIC="%~p1\pclint.lnt".
> lint-nt "-os(%%~pf%%~nf.lint)" %LINT_INCLUDE% !DIR_SPECIFIC!
> !FILE_SPECIFIC_CONFIG! u:\Projects\BAC\B_BC\sw\BC.lnt -u %%f
> )
>
> "Pegasus (MVP)" wrote:
>
>>
>> "Buddy Lott" <BuddyLott@discussions.microsoft.com> wrote in message
>> news:94460634-69B5-4DAF-B70A-D0D89DA358CF@microsoft.com...
>> > If I run the following script in a directory with two files named
>> > test1.txt &
>> > test2.txt, FILELIST should have the value of
>> > "Test2.txt;Test1.txt;NOFILES".
>> > Instead it has the value of "Test2.Txt;NOFILES". Can any one tell me
>> > why?
>> > Or
>> > how to get it to work correctly?
>> >
>> > @SET FILELIST=NOFILES
>> > @for %%f in (*.txt) do @(
>> > @echo %%f
>> > @set FILELIST= %%f;%FILELIST%
>> > @echo %FILELIST%
>> > )
>> >
>> > Thanks,
>> >
>>
>> Sorry, I meant
>>
>> for /?
>>
>> at the Command Prompt.
>>
>>
>>
 

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