Conditionally perform a command on several Directories/Folders.
Syntax FOR /D [/r] %%parameter IN (folder_set) DO command Key folder_set : A set of one or more folders enclosed in parenthesis (folder1,folder2). Wildcards must be used. command : The command to carry out, including any parameters. This can be a single command, or if you enclose it in (brackets), several commands, one per line. %%parameter : A replaceable parameter: in a batch file use %%G (on the command line %G) /r : Recurse into subfolders (see notes below)
In all cases for /d will start searching from the current directory.
Unlike other variants of the FOR command you must include a wildcard (either * or ?) in the 'folder_set' to get consistent results returned. In many cases you can work around this by adding a single character wildcard e.g. if you are looping through multiple folders to find the exact folder January you could instead specify Janu?ry
If any path in the the folder_set includes spaces, then surround the path with double quotes.
The option /d /r is undocumented, but can be a useful combination, while it will recurse through all subfolders the wildcard will only match against Folder/Directory names (not filenames).
An alternative command to list folders and sub folders matching a wildcard is DIR:
C:\> dir /b /s /a:d "C:\Work\reports*"
To loop through each folder programatically, we can wrap that in a FOR /F command:
C:\> for /f "tokens=*" %G in ('dir /b /s /a:d "C:\Work\reports*"') do echo Found %G
or the same thing in a batch file, with the %'s doubled:
for /f "tokens=*" %%G in ('dir /b /s /a:d "C:\Work\reports*"') do echo Found %%G
Although Win32 will not recognise any file or directory name that begins or ends with a '.' (period / full stop) it is possible to include a Full Stop in the middle of a directory name and this can cause issues with FOR /D.
Parameter expansion will treat a Full Stop as a file extension, so for a directory name like "Sample 2.6.4" the output of %%~nG will be truncated to "Sample 2.6" to return the whole folder name use %%G or %%~nxG
List every subfolder, below the folder C:\Work\ that has a name starting with "User":
FOR /D /r %%G in ("User*") DO Echo We found %%~nxG
FOR is an internal command.
"I knew of one little DO loop that ran for 48 hours, cost $14,000 and did
Balfour and Marwick
FOR - Loop commands
FOR - Loop through a set of files in one folder
FOR /R - Loop through files (recurse subfolders)
FOR /L - Loop through a range of numbers
FOR /F - Loop through items in a text file
FOR /F - Loop through the output of a command
FORFILES - Batch process multiple files
GOTO - Direct a batch program to jump to a labelled line
IF - Conditionally perform a command
Powershell: ForEach-Object - Loop for each object in the pipeline
Equivalent bash command (Linux): for - Expand words, and execute commands