Windows batch script - How to filter files with defined extension

Question

I want to do some stuffs on images with extensions defined in a variable. The following script run well:

set AllowExt="jpg png bmp"
forfiles /p D:\Pictures /m *.* /c "cmd /c if not %AllowExt:jpg=% == %AllowExt% echo @file

But the following script throws error

set AllowExt="jpg png bmp"
forfiles /p D:\Pictures /m *.* /c "cmd /c if not %AllowExt:@ext=% == %AllowExt% echo @file"

ERROR: Invalid argument/option - 'png'. Type "FORFILES /?" for usage.

Endoro · Accepted Answer · 2013-07-15 09:04:45Z

5

You might try this:

set "AllowExt=.jpg .png .bmp"
for %%a in (%AllowExt%) do (
  forfiles /p D:\Pictures /m *%%a /c "cmd /c echo @file"
)

"cmd /c echo @file" is the default command, see forfiles /?.

edited Jul 15, 2013 at 9:04

answered Jul 14, 2013 at 10:47

Endoro

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1 Comment

Jin Ho Over a year ago

Fixed as following and it ran okay. set AllowExt=.jpg .png .bmp for %%a in (%AllowExt%) do ( forfiles /p D:\Pictures /m *%%a /c "cmd /c echo @file" )

foxidrive · Accepted Answer · 2013-07-14 12:34:23Z

1

This should get you the filenames you need.

@echo off
set "AllowExt=jpg png bmp"
set "AllowExt= %AllowExt%"
set "AllowExt=%AllowExt: = *.%"
  pushd "D:\Pictures"
   for %%a in (%AllowExt%) do (
     echo "%%a"
   )
  popd

answered Jul 14, 2013 at 12:34

foxidrive

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