How to display the remaining space of a disk? - China DOS Union Forum

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.

─────────────────　Moderation Record　─────────────────
Executor: Will Sort
Operation: Merge thread {21183} The formatting error occurred through the method of intercepting characters -> Posts 32~36
Description: The operated thread has a direct context connection with this thread
─────────────────　Moderation Record　─────────────────

::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 ]

Floor31　willsort	Posted 2006-06-11 18:54
元老会员　Posts 1,512　Credits 4,432
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

Floor32　namejm	Posted 2006-06-11 20:08
荣誉版主　Posts 1,737　Credits 5,226　From 成都
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 ] Attachments error1.jpg (37.38 KiB)

Floor33　willsort	Posted 2006-06-11 20:23
元老会员　Posts 1,512　Credits 4,432
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.

Floor34　namejm	Posted 2006-06-11 21:03
荣誉版主　Posts 1,737　Credits 5,226　From 成都
It's really that you can't have both fish and bear's paws! :(

Floor35　willsort	Posted 2006-06-12 19:27
元老会员　Posts 1,512　Credits 4,432
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* ]

Floor36　namejm	Posted 2006-06-12 23:13
荣誉版主　Posts 1,737　Credits 5,226　From 成都
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.

Floor37　willsort	Posted 2006-06-14 16:51
元老会员　Posts 1,512　Credits 4,432
─────────────────　Moderation Record　───────────────── Executor: Will Sort Operation: Merge thread {21183} The formatting error occurred through the method of intercepting characters -> Posts 32~36 Description: The operated thread has a direct context connection with this thread ─────────────────　Moderation Record　─────────────────

Floor38　mobo	Posted 2006-09-19 08:41
初级用户　Posts 30　Credits 73
::View logicaldisk [Logical Disk] summary information.bat: ::---------BY MOBO in 2006-09-18 wmic logicaldisk list brief /format:hform >logicaldisk.htm

Floor39　electronixtar	Posted 2006-09-19 08:56
铂金会员　Posts 2,672　Credits 7,493
Han~~Nowadays, it's all about WMIC~~

Floor40　namejm	Posted 2006-09-19 09:40
荣誉版主　Posts 1,737　Credits 5,226　From 成都
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.

Floor41　electronixtar	Posted 2006-09-19 10:03
铂金会员　Posts 2,672　Credits 7,493
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 ]

Floor42　zouzhxi	Posted 2006-09-22 07:56
中级用户　Posts 177　Credits 430　From 广东深圳
If you want to display the total size of the hard disk, how to write...

Floor43　HUNRYBECKY	Posted 2007-01-21 10:26
银牌会员　Posts 442　Credits 1,179
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.

Floor44　HUNRYBECKY	Posted 2007-01-21 10:43
银牌会员　Posts 442　Credits 1,179
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=%%a1024+%%b1024/100 echo %OK% pause

Floor45　HUNRYBECKY	Posted 2007-01-21 10:47
银牌会员　Posts 442　Credits 1,179
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=%%a1024+%%b1024/100 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 ]