Find string in text file and set variable with windows batch

问题

I have a file named hdd_list.txt.

Index: 0
Device Name: \Device\Harddisk0\Partition0
Drive: entire disk
Label: 
Type: Harddisk
Size: 55.899GB

Index: 1
Device Name: \Device\Harddisk0\Partition1
Drive: C:\
Label: 
Type: Harddisk
Size: 55.897GB

Index: 2
Device Name: \Device\Harddisk1\Partition0
Drive: entire disk
Label: 
Type: Harddisk
Size: 465.761GB

Index: 3
Device Name: \Device\Harddisk1\Partition1
Drive: E:\
Label: Backup
Type: Harddisk
Size: 465.758GB

I need to retrieve Index number corresponding to "c:\" and then subtract it minus 1 to get Index for the entire disk.

Any ideas ?

回答1:

Try next array-like approach:

@ECHO OFF >NUL
SETLOCAL enableextensions enabledelayedexpansion
set /A "ii=-1"
For /F "usebackq tokens=1* delims=:" %%G in (
        "D:\bat\StackOverflow\files\30435794.txt") do (
    if /I "%%~G"=="Index" set /A "ii+=1"
    For /F "tokens=*" %%# in ("%%~H") do set "auxH=%%~#"
    set "__%%~G[!ii!]=!auxH!"

    if /I "!auxH!"=="C:\" set /A "__indexC=!ii!-1"

  )
set __ | findstr /I /L "[%__indexC%]"

ENDLOCAL
goto :eof

Output:

==>D:\bat\StackOverflow\30435794.bat
__Device Name[0]=\Device\Harddisk0\Partition0
__Drive[0]=entire disk
__Index[0]=0
__Size[0]=55.899GB
__Type[0]=Harddisk

==>

Resources (required reading):

(command reference) An A-Z Index of the Windows CMD command line
(additional particularities) Windows CMD Shell Command Line Syntax
(%~G etc. special page) Command Line arguments (Parameters)
(special page) EnableDelayedExpansion

回答2:

@echo off
setlocal

set "Index="
for /F "tokens=2" %%a in ('findstr "Index: Drive:" hdd_list.txt') do (
   if not defined Index (
      set /A Index=%%a-1
   ) else (
      if /I "%%a" equ "C:\" (
         goto diskFound
      ) else (
         set "Index="
      )
   )
)
:diskFound
echo The index for entire disk C:\ is: %Index%

回答3:

I would use JREPL.BAT - a pure script (hybrid JScript/batch) regular expression text processing utility that runs natively on any Windows machine from XP onward.

@echo off
for /f %%N in (
  'jrepl "Index: (\d+)\r?\n.*\nDrive: C:\\" "$1-1" /jmatch /m /f hdd_list.txt'
) do set "index=%%N"

I use the /M option to allow searches across multiple lines, and the /JMATCH option to only return matches, and to specify the replacement string as a JScript expression (subtract 1 from the value).

The search looks for the Index line, capturing the number, followed by any line, followed by the Drive: C\ line.

来源：https://stackoverflow.com/questions/30435794/find-string-in-text-file-and-set-variable-with-windows-batch

标签

windows

batch-file

numbers

line