China DOS Union

Re namejm:

It's a pity there's no Win2000 environment, so I can't test. The targeted solution needs you to detail the error message.

Currently, the way I can think of is to remove find, and it works under CMD@WinXP:

@echo off & setlocal EnableDelayedExpansion

for %%d in (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 (

    if exist %%d:\nul (

        for /f "tokens=3" %%z in ('dir /-c %%d:\') do set freesize=%%z

        set /a freesize=!freesize:~0,-3!/1049>nul

        set freesize=         !freesize!

        set freesize=!freesize:~-9!

        echo %%d drive free space:!freesize! MB

    )

)

pause

When using the method of intercepting the last few characters to right-align the display of the disk volume label name and remaining space, the following incorrect format occurs (it can be formatted correctly when the volume label name is all in English). What is the reason?

The code and picture are as follows

@echo off 

cls

color 2e

title Situation of remaining space in each partition

echo.

echo.

echo        ╔══════════════════════════════╗

echo        ║        Disk partitions         Disk volume label name      Remaining space (MB)       ║

echo        ║    _____________________________________________________   ║

setlocal enabledelayedexpansion 

for %%a in (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 (

  if exist %%a:\nul (

    for /f "tokens=3" %%b in ('dir /-c %%a:\^|find "Available bytes"') do (

      set freesize=%%b

      set /a freesize=!freesize:~0,-3!/1049>nul 2>nul

      set freesize=       !freesize!

      set freesize=!freesize:~-7!

      for /f "tokens=4" %%c in ('vol %%a:')  do set volume=%%c 

      set volume=                    !volume!

      set volume=!volume:~-20!

      echo        ║           %%a: !volume!        !freesize!           ║

    )

  )

)

echo        ╚══════════════════════════════╝

pause>nul

[ Last edited by willsort on 2006-6-12 at 19:31 ]

Re namejm:

Because NT internally uses Unicode encoding, and one characteristic of Unicode characters is that "English and Chinese characters with different display widths have the same byte length and character length".

This problem is relatively difficult to solve. The alternative solutions are nothing more than ensuring that no Chinese characters appear (that is, not displaying the volume label), or following my original suggestion of not using borders and moving the volume label column to the back.

It's really that you can't have both fish and bear's paws! :(

Re: namejm:

Now, some schemes to align Chinese characters or other multi-byte characters are thought of.

If it can be ensured that the displayed variable string only has Chinese characters, when padding variables, blank Chinese characters (such as full-width spaces in full-width state) can be used instead of ordinary spaces;

Otherwise, it is necessary to judge the display width of the variable string. In the default Chinese environment, it can be understood as judging the byte length of the variable string in the local encoding (ANSI). Regarding this point, the current scheme is to generate a temporary file (using ANSI encoding by default), and determine the variable length according to the file length. The code is as follows

But it still cannot align the overly long volume labels of NTFS. So I still suggest not insisting on adopting certain special character arrangement methods. There are many alternative schemes. For example, the volume label can be written in the front, and the drive letter will be followed by a pair of parentheses immediately after the volume label, as shown in "My Computer".

And displaying changing strings in the border will always have the hidden danger of misaligned borders, and it also affects the readability of the code itself. Good typesetting effects can also be achieved by using other methods without using borders.

In addition, the volume of the picture attachment is too large, and only one is left for illustration; in addition, the screenshot of the CMD window using a 16-color GIF will be much smaller in size, and the effect will not be too distorted.

DrvSpace.cmd

@echo off & setlocal EnableDelayedExpansion

color 2e

title Disk Partition Free Space

echo.

echo.

echo        ╔══════════════════════════════╗

echo        ║        Disk Partitions        Disk Volume Name      Free Space(MB)       ║

echo        ║    _____________________________________________________   ║

for %%d in (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 (

    if exist %%d:\nul (

        for /f "tokens=3" %%z in ('dir /-c %%d:\') do set freesize=%%z

        set /a freesize=!freesize:~0,-3!/1049>nul

        set freesize=         !freesize!

        set freesize=!freesize:~-9!

        for /f "tokens=3*" %%v in ('vol %%d:') do set volume=%%w

        echo.!volume!>_volume.tmp

        for %%f in (_volume.tmp) do for /l %%v in (%%~zf,1,20) do set volume= !volume!

echo        ║           %%d:   !volume!     !freesize!           ║

    )

)

echo        ╚══════════════════════════════╝

if exist _volume.tmp del _volume.tmp

pause

[ Last edited by willsort on 2006-6-12 at 19:34 ]

Thanks to willsort, I have slightly modified the code and incorporated it into my file backup script. Although there are still potential risks, once it's published, more people will try to figure it out, which is better than doing nothing.

I just posted a few pictures and didn't notice the impact of image format and color quality on the image size. I will pay attention to posting pictures that are as small as possible but still relatively clear in the future.

::View logicaldisk [Logical Disk] summary information.bat:
::---------BY MOBO in 2006-09-18
wmic logicaldisk list brief /format:hform >logicaldisk.htm

Han~~Nowadays, it's all about WMIC~~

Originally posted by electronixtar at 2006-9-19 08:56:
Cold~ Now it's all about WMIC~ ~

　　Hehe, it seems that electronixtar is quite familiar with WMIC. I want to ask what are the advantages and disadvantages of WMIC and CMD respectively.

cmd is close to bat, while wmic is close to wbem, that's it~~

Actually, I don't know much about it~~ Just heard about it~~ BagPipe is an expert, but he doesn't post threads~~

Actually, Windows is becoming more and more like UNIX~~

[ Last edited by electronixtar on 2006-9-19 at 10:07 ]

If you want to display the total size of the hard disk, how to write...

If DOS supports floating-point operations, then the following method can be used to obtain disk space:

for /f "skip=4 tokens=4 delims=， " %%a in ('defrag c: -a') do (set /a freesize=%%a*1024)

pause

Unfortunately, an error is prompted because floating-point operations are not supported.

Just now studied, modifying the above code can achieve a disguised floating-point calculation.

for /f "skip=4 tokens=4 delims=， " %%a in ('defrag d: -a') do echo %%a>ok.txt

for /f "tokens=1* delims=." %%a in (ok.txt) do set /a ok=%%a*1024+%%b*1024/100

echo %OK%

pause

When modifying, I found that the FOR command actually supports calling variables as the SET set, so there's no need to generate temporary files anymore.

@echo off

set /p mydisk=Please enter the disk you want to query (such as E:):

for /f "skip=4 tokens=4 delims=， " %%a in ('defrag %mydisk% -a') do set dftemp=%%a

for /f "tokens=1* delims=." %%a in ("%dftemp%") do set /a diskfree=%%a*1024+%%b*1024/100

echo The remaining space of %mydisk% is: %diskfree%MB

pause

I'm sorry, I'm not very familiar with FOR and have been using it poorly all the time

[ Last edited by HUNRYBECKY on 2007-1-21 at 11:06 AM ]