Tips & Tricks

@@Dosbatch_logo@@

DOS batch scripts

• The “_” Windows Batch Library (The “underscore” Windows Batch Library)
  is a collection of generic, ready-to-use batch scripts - and has a life (and repository) of it’s own.
• The “_” Windows Batch Library Tips & Tricks
• getBookCover
  Download book covers by ISBN
• How to get piped input in windows batch file? @@Stackoverflow_icon@@
• Elevation, local and domain admin
• Get Doxy header
• FORFILES is The-Windows-way of finding directories and files.
• Tail Print the last 30 lines of each FILE to standard output.
• ISO 86001 - Current date in ISO 86001 (YYYY-MM-DDThh:mm:ss.000z)
• getGithub.cmd - Download a repository and unpack specific directory - or entire repo
• default value of Set /p in batch script @@Stackoverflow_icon@@: SET /P "MyVar=" || SET "MyVar=My Default Value"

Findstr w. OR

findstr /I /R "@fn @brief" handleStrings.php

Get first/last line from file

Source: Fetch only first line from text file using Windows Batch File @@Stackoverflow_icon@@

(ECHO:A a&ECHO:B b&ECHO:C c)>file.txt

:: Fetch only first line from text file using Windows Batch File - https://stackoverflow.com/a/46134683
ECHO Get first line from file:
SET first_line=
SET /P first_line=<file.txt&CALL ECHO %first_line%

ECHO Get last line from file:
SET last_line=
FOR /F "UseBackQ Delims==" %%A In ("file.txt") DO SET "last_line=%%A" 
ECHO %last_line%

ZIP

On Windows 10 build 17063 or later you can use tar.exe (Source: Superuser @@Superuser_icon@@ )

C:\> tar -xf archive.zip

ls -l

@echo off&SETLOCAL enabledelayedexpansion
# ls -l
for /f "tokens=*" %%i in ('dir /a /b /-p /o:gen') do ( 
    SET "_FILE=%%i                                       ."
    SET "_ATTRIB=%%~ai ."
    SET "_SIZE=           %%~zi"
    ECHO !_FILE:~0,40!	%%~ti !_SIZE:~-11!  !_ATTRIB:~0,11!.
)

Get last token

:: https://stackoverflow.com/a/26493855
:getLastToken
SETLOCAL
    for %%a in ("%~2\.") do set "lastPart=%%~nxa"
    ENDLOCAL&SET "%~1=%lastPart%"
GOTO :EOF

Loops

[!WARNING] You cannot break out of an infinite loop

for /L %%L in ( ) do  (

Will hang!

Instead use huge values in loop - and bail out:

set cnt=0

for /L %%L in (0 1 9999) do  (
    set /a cnt+=1
    echo Loop !cnt!
    if /I !cnt! GTR  10 goto :break
)
:break

Works nicely

Usefull links

• [DosTips - The DOS Batch Guide @@dostips_icon@@]](https://www.dostips.com).
  This DOS batch guide brings structure into your DOS script by using real function like constructs within a DOS batch file.