Windows – batch find file extension

batch-filedoswindows

If I am iterating over each file using :

@echo off

FOR %%f IN (*\*.\**) DO (
    echo %%f
)

how could I print the extension of each file? I tried assigning %%f to a temporary variable, and then using the code : echo "%t:~-3%" to print but with no success.

Best Solution

The FOR command has several built-in switches that allow you to modify file names. Try the following:

@echo off
for %%i in (*.*) do echo "%%~xi"

For further details, use help for to get a complete list of the modifiers - there are quite a few!

Related Solutions

How to pass arguments to a batch file

Another useful tip is to use %* to mean "all". For example:

echo off
set arg1=%1
set arg2=%2
shift
shift
fake-command /u %arg1% /p %arg2% %*

When you run:

test-command admin password foo bar

the above batch file will run:

fake-command /u admin /p password admin password foo bar

I may have the syntax slightly wrong, but this is the general idea.

Windows – How to you find out which process is listening on a TCP or UDP port on Windows

New answer, powershell

TCP

Get-Process -Id (Get-NetTCPConnection -LocalPort YourPortNumberHere).OwningProcess

UDP

Get-Process -Id (Get-NetUDPEndpoint -LocalPort YourPortNumberHere).OwningProcess

Old answer, cmd

 C:\> netstat -a -b

(Add -n to stop it trying to resolve hostnames, which will make it a lot faster.)

Note Dane's recommendation for TCPView. It looks very useful!

-a Displays all connections and listening ports.

-b Displays the executable involved in creating each connection or listening port. In some cases well-known executables host multiple independent components, and in these cases the sequence of components involved in creating the connection or listening port is displayed. In this case the executable name is in [] at the bottom, on top is the component it called, and so forth until TCP/IP was reached. Note that this option can be time-consuming and will fail unless you have sufficient permissions.

-n Displays addresses and port numbers in numerical form.

-o Displays the owning process ID associated with each connection.