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@echo off
:: drivefree.cmd
:: Written by: Jim Martinson
:: Written on: 2010/04/16
:: Test if command line extensions are enabled.
if "%~1"=="~1" goto:ExtensionsAreNotEnabled
:: Display help when the /? parameter is passed.
if NOT "%~1"=="/?" goto SkipHelp
echo Show free space on the current drive.
echo.
echo Usage: %~n0 [/a^|drive:]
echo.
echo /a = Show free space for all drives.
echo drive: = The drive to show free space for.
echo The default is the current drive.
echo.
goto:EOF
:ExtensionsAreNotEnabled
echo Command line extensions are not enabled. They must be enabled for %~n0 to work properly.
echo %~n0 aborted.
echo.
goto:Help
:SkipHelp
:: Test for /a.
if /I "%~1" EQU "/a" (
set _cmd=%~0
call:DisplayAllDrives
goto:EOF
)
:: Test for drive letter.
if "%~1"=="" (
:: Get the current drive letter.
for /f "tokens=4" %%d in ('dir /a^|find "Volume in drive "') do set _drive=%%d:
) else (
:: Use drive given and test if the drive exists and is ready.
set _drive=%~1%
call:TestDrive
)
if NOT defined _drive (
:: The drive does not exist or is not ready.
echo Drive %~1% not ready or is not a drive.
goto:EOF
)
:: Find the free bytes.
for /f "tokens=2,3" %%a in ('dir /a %_drive% ^|find "bytes free"') do if "%%a"=="Dir(s)" echo %_drive% has %%b bytes free.
set _cmd=
set _drive=
goto:EOF
:DisplayAllDrives
:: Loop through all possible drives.
for %%d in (A B C D E F G H I J K L M N O P Q R S T U V W X Y Z) do call:TestDriveLetter %%d: call
goto:EOF
:TestDrive
:: Test for : in drive name.
echo %_drive%|find ":" >nul
if %errorlevel%==1 (
set _drive=
) else (
:: Test if drive exists and is ready.
call:TestDriveLetter %_drive%
)
:TestDriveLetter
:: Test if drive exists and is ready.
dir %1 >nul 2>nul
if %errorlevel%==0 (
:: The drive exists and is ready so display free bytes if called by :DisplayAllDrives
if "%2"=="call" call:SkipHelp %1
) else (
:: Set flag to display error.
set _drive=
)
goto:EOF