如何从Shell脚本创建批处理文件

Question

I have a script to run on a unix box that looks for the most recently-added file in a directory and writes the name of that file to a new file. It looks like

ls -t|head -n 1 >> ../latestfile.txt

However I now need to get this to run on a windows box and have been told it needs to be .bat. Can anyone help with what this would look like?

Answer 1

Your best bet is to install Cygwin and call it a day.

Cygwin is a large collection of GNU and Open Source tools which provide functionality similar to a Linux distribution on Windows.

Afterwards you should the be able to run that command from the regular Windows command line, a Batch File, or a Scheduled Task.

Answer 2

This effectively gives the same result.

@echo off
 :latest file
for /f "delims=" %%a in ('dir /b /od /a-d') do >"latestfile.txt" echo %%a

Answer 3

An equivalent for ls -t in Windows cmd could be:

• dir /B /TC /OD /AD - sorted (see /OD ) by creation date & time (see /TC );
• dir /B /TW /OD /AD - sorted (see /OD ) by last write date & time (see /TW ): the same if /T switch omitted at all.

head -n 1 equivalent: to get the most recent file name (add /TC switch if desired), ie last item in dir /b output to a variable:

for /F "delims=" %G in ('dir /B /OD /A-D') do set "_lastfile=%~G"

Next .bat should work (note doubled % in the loop variable name %%G ) and add a line containing filename (incl. extension if present, no path) of the recently changed file from current directory to the ..\\latestfile.txt . Here the ..\\ means parent folder of the current directory.

@echo OFF
setlocal EnableExtensions
set "_lastfile="                 empty the `_lastfile` variable
for /F "delims=" %%G in ('dir /B /OD /A-D') do set "_lastfile=%%~G"
>> ..\latestfile.txt echo(%_lastfile%

To add fully qualified file name, change the last line as follows:

>> ..\latestfile.txt echo(%CD%\%_lastfile%

Resources (required reading):

• (command reference) An AZ Index of the Windows CMD command line
• (additional particularities) Windows CMD Shell Command Line Syntax
• ( %~G etc. special page) Command Line arguments (Parameters)
• ( >> , > etc. special page) Redirection