update to win2unix

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Sponge Belly
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update to win2unix

#1 Post by Sponge Belly » 22 Oct 2012 08:46

Hello All!

Everyone knows this old trick of converting Unix text files to Windows format:

Code: Select all

more unix.txt > win.txt


Btw, more waits for keypress after scrolling 65,534 lines no matter what. But going the other way (from Windows to Unix) is less straightforward. But with a little chicanery and a lot of findstr, I was able to do it.

Type ‘win2unix /?’ for basic usage info. Read the notes for limitations on use.

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@echo off & setlocal enableextensions
if "%~1" neq "/re-enter" goto init
shift /1
if "%~1" neq "" (call :win2unix "%~1") else call :win2unix
goto end

:init
(set lf=^

)
set nl=^^^%lf%%lf%^%lf%%lf%
for /f %%h in (^"/?%nl%/h%nl%/he%nl%/hel%nl%/help^") ^
do if /i "%~1"=="%%h" call :usage && goto end
if "%~2" neq "" (>&2 echo(too many arguments& (call) & goto end)

(call;)

setlocal enabledelayedexpansion
if /i "!cmdcmdline!" neq "!cmdcmdline:%comspec%  /s /d /c=!" ^
set "piped=1"
endlocal & set "piped=%piped%"

if "%~1" neq "" (if exist "%~1\" (>&2 echo("%~1" is a folder
(call) & goto end) else if not exist "%~1" (
>&2 echo(file "%~1" not found& (call) & goto end)
echo("%~1" | findstr "\* \?" >nul && (
>&2 echo(wildcards (* and ?^) not permitted& (call) & goto end)
if "%~z1"=="0" (>&2 echo(file "%~1" is empty& (call) & goto end)
if defined piped (
>&2 echo(specify input from pipe OR file--but not both& (call)
goto end)) else if not defined piped call :usage && goto end

call "%~dpf0" /re-enter "%~1" | findstr /v "^$"

:end
endlocal & goto :EOF

:win2unix
setlocal
if "%~1"=="" (set "file=") else set "file= "%~1""

for /f "delims=" %%i in ('findstr /n "^"%file%') do (
set "line=%%i"
setlocal enabledelayedexpansion
set "line=!line:*:=!!lf!"
echo(!line!
endlocal
)

endlocal & exit /b 0

:usage
set ^"\n=^^^%lf%%lf%^%lf%%lf%^^"
cls & echo(Converts newlines from Windows to Unix.%nl%%\n%
Usage:%nl%%\n%
  %~n0 win.txt [^> unix.txt]%\n%
  %~n0 win.txt [^| command-name]%\n%
  command-name ^| %~n0 [^> unix.txt]%\n%
  command-name1 ^| %~n0 [^| command-name2]%nl%%\n%
where win.txt has ^<CR^>^<LF^> line-endings and unix.txt ^
uses ^<LF^> for end-of-line.%nl%%\n%
Notes:%\n%
- Writes to Standard Output ^(STDOUT^) by default.%\n%
- Input should be 8-bit ASCII.%\n%
- Null Character (ASCII 0) in input will corrupt output.%\n%
- Cannot process lines longer than approx 8kb.
exit /b 0


Read this blog post for more information.

- SB
Last edited by Sponge Belly on 17 Apr 2013 16:49, edited 4 times in total.

foxidrive
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Posts: 6033
Joined: 10 Feb 2012 02:20

Re: DOS to Unix

#2 Post by foxidrive » 22 Oct 2012 16:54

This simplifies it a tad:

Syntax: batchfile "file.txt" >"file2.txt"

Code: Select all

@echo off
:init
for /f %%c in ('copy /z "%~dpnx0" nul') do set cr=%%c
(set lf=^

)
del file.tmp 2>nul
for /f "delims=" %%i in ('findstr /n "^" "%~1"') do (
set "line=%%i"
setlocal enabledelayedexpansion
set "line=!line:*:=!!lf!"
echo(!line!
endlocal
)>>file.tmp
setlocal enabledelayedexpansion
findstr /v "!cr!!lf!" file.tmp
endlocal
del file.tmp 2>nul

Sponge Belly
Posts: 203
Joined: 01 Oct 2012 13:32
Location: Ireland
Contact:

Re: update to win2unix

#3 Post by Sponge Belly » 17 Apr 2013 17:12

Thanks again for the feedback, Mic!

But I’ve updated win2unix yet again (see first post). I’m much happier with this latest version. It traps more errors and is more user-friendly. Read this post on my blog for the whole story.

Btw, I discovered that findstr /v "^$" will do the same job as findstr /v "!cr!!lf!", so no need for delayed expansion.

Hope you find win2unix useful. I’ve learnt a lot from writing it! :-)

- SB

Ed Dyreen
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Joined: 16 May 2011 08:21
Location: Flanders(Belgium)
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Re: DOS to Unix

#4 Post by Ed Dyreen » 18 Apr 2013 05:06

foxidrive wrote:This simplifies it a tad:

Syntax: batchfile "file.txt" >"file2.txt"

Code: Select all

@echo off
:init
for /f %%c in ('copy /z "%~dpnx0" nul') do set cr=%%c
(set lf=^

)
del file.tmp 2>nul
for /f "delims=" %%i in ('findstr /n "^" "%~1"') do (
set "line=%%i"
setlocal enabledelayedexpansion
set "line=!line:*:=!!lf!"
echo(!line!
endlocal
)>>file.tmp
setlocal enabledelayedexpansion
findstr /v "!cr!!lf!" file.tmp
endlocal
del file.tmp 2>nul

Code: Select all

lf%LF%andcrlf%CRLF%lf%LF%andcrlf%CRLF%the end
On XP it produces ( %lf% = linefeed, %crlf% = controlLinefeed )

Code: Select all

lf%LF%andcrlf%LF%lf%LF%andcrlf%LF%the end%LF%%CRLF%C:\myCurrentDir>
Similar problems here

foxidrive
Expert
Posts: 6033
Joined: 10 Feb 2012 02:20

Re: DOS to Unix

#5 Post by foxidrive » 18 Apr 2013 05:14

Ed Dyreen wrote:

Code: Select all

lf%LF%andcrlf%CRLF%lf%LF%andcrlf%CRLF%the end
On XP it produces ( %lf% = linefeed, %crlf% = controlLinefeed )

Code: Select all

lf%LF%andcrlf%LF%lf%LF%andcrlf%LF%the end%LF%%CRLF%C:\myCurrentDir>
Similar problems here


I don't follow you Ed. Are you saying that a file with mixed line endings will end up even more mixed up?

Ed Dyreen
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Joined: 16 May 2011 08:21
Location: Flanders(Belgium)
Contact:

Re: update to win2unix

#6 Post by Ed Dyreen » 18 Apr 2013 06:00

'
I probably did something wrong, I had to use cmd /k batchfile.cmd "in.txt" >"ou.txt" otherwise it wouldn't produce output ? There is something special, I would expect several crlf's from the echo( but it's somehow replaced succesfully. It's only at the end something goes wrong.

carlos
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Re: update to win2unix

#7 Post by carlos » 18 Apr 2013 07:23

I remember bad, but this:
more unix.txt > win.txt

only converts the final LF at the end of file to CRLF but keep the LF in the middle.?

foxidrive
Expert
Posts: 6033
Joined: 10 Feb 2012 02:20

Re: update to win2unix

#8 Post by foxidrive » 18 Apr 2013 08:19

Carlos, I tested it on three lines in a file and they were all converted to CRLF

Sponge Belly
Posts: 203
Joined: 01 Oct 2012 13:32
Location: Ireland
Contact:

Re: update to win2unix

#9 Post by Sponge Belly » 18 Apr 2013 15:39

FoxiDrive wrote:Carlos, I tested it on three lines in a file and they were all converted to CRLF


And more will end the converted file with CRLF, regardless of what the original file ended with.

- SB

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