I'm on Windows, and needed a script to convert line endings to *nix format in all files in a specified directory with all subdirectories. Thought I'll quickly find perl or batch + perl solution, but i didn't :( So, I wrote my own. It'd probably be easier to just do Perl, or download some existing dos2unix tool, but I ended up with batch + perl script. At least I learned something new: the -i switch and something about Perl's environmental variables, like PERLIO.

Anyways, here it is:

# dos2unix.bat

@echo off

if "%1"=="" goto usage

setlocal
set PERLIO=perlio
for /r %1 %%X in (*.*) do (
    perl -pi.bak -e "s/\r\n/\n/g" "%%X"
    del "%%X.bak"
)
goto bye

:usage
echo.
echo  USAGE: %0 directory
echo.

:bye
[download]

• 1. There's no way to use -i switch w/o it creating backups?
• 2. Any comments?

EDIT: Notes, points and fixes from the comments:

• A bare -i does not work on Windows because you can't unlink a file while it's still open. -Corion
• Added SETLOCAL - fix by ikegami
• This should only be used on plain text files, as it will corrupt binaries -cdarke
• An Anonymous Monk's list of links lead me to a shorter solution! see below

EDIT 2: here is a shorter solution - no need to set env var

@echo off

if "%1"=="" goto usage

for /r %1 %%X in (*.*) do (
    perl -pi.bak -e "binmode ARGVOUT; s/\cM//" "%%X"
    del "%%X.bak"
)
goto bye

:usage
echo.
echo  USAGE: %0 directory
echo.

:bye
[download]

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