How to find a certain word in a file without using ERRORLEVEL (batch)

Question

I can use ERRORLEVEL, but tried and with a loop it failed. I am writing a batch "shell." Since I have tried and tried, I am finally asking for help. The reason I don't want to use errorlevel is because the loop.

(FULL) SHELL

@set /p build=<"C:\Users\%username%\Desktop\WellOS2\WellOS\Build".txt @title WellOS V.%build% @echo off goto boot :register cls echo You are registering... echo If this is an error press CTRL + C NOW... pause cls set /p user= Enter your username: set /p passwordreg= Enter your password: mkdir "C:\Users\%username%\Desktop\WellOS2\Users\%user%" mkdir "C:\Users\%username%\Desktop\WellOS2\Users\%user%\Documents" echo %passwordreg% >"C:\Users\%username%\Desktop\WellOS2\Users\%user%\password".txt echo 2 >"C:\Users\%username%\Desktop\WellOS2\OSfiles\bootset".txt echo Your done. pause goto welloslog :booterror echo Sorry the boot file has an error. Check the user manual for BOOT$ pause :boot set /p boot=<"C:\Users\%username%\Desktop\WellOS2\OSfiles\bootset".txt if %boot% == 1 goto register if %boot% == 2 goto welloslog goto booterror cls :ERROR cls echo ----------ERROR------------------- echo %error% pause goto %back% :welloslog cls echo Welcome to WellOS2! echo ----------------LOGIN------------- set /p user= Username: if exist "C:\Users\%username%\Desktop\WellOS2\Users\%user%" goto pass set error= Sorry that account doesn't exist. set back=welloslog goto welloslogerror :pass set /p password=<"C:\Users\%username%\Desktop\WellOS2\Users\%user%\password".txt set /p passwordlog= Password: if /i %passwordlog% == %password% goto wellos set error= Sorry! wrong password. set back= welloslog goto error :wellos cls :wellosnocls echo --------------MAIN--------------- echo type help for help set /p command= #: if exist "C:\Users\%username%\Desktop\WellOS2\Programdata\%command%.sys" set type=sys if exist "C:\Users\%username%\Desktop\WellOS2\Programdata\%command%.pro" set type=pro if exist "C:\Users\%username%\Desktop\WellOS2\Programdata\%command%.sys" goto po if exist "C:\Users\%username%\Desktop\WellOS2\Programdata\%command%.pro" goto po set error= !Unreconized program/system program! set back=wellos goto error :po set lines=0 echo --------------%command%.%type%--------------- :porep set /a lines=%lines% + 1 set /p "code="<"C:\Users\%username%\Desktop\WellOS2\Programdata\%command%.%type%\%command%.%type%-%lines%".wellcode if "%code%"=="GOWELL" goto wellosnocls findstr /I /L "if" "C:\Users\%username%\Desktop\WellOS2\Programdata\%command%.%type%\%command%.%type%-%lines%.wellcode" :skip call %code% goto porep ::Tools :iftl %code% goto porep

PROGRAM OPENER (What I am talking about, and having problems with...)

:po set lines=0 echo --------------%command%.%type%--------------- :porep set /a lines=%lines% + 1 set /p "code="<"C:\Users\%username%\Desktop\WellOS2\Programdata\%command%.%type%\%command%.%type%-%lines%".wellcode if "%code%"=="GOWELL" goto wellosnocls findstr /I /L "if" "C:\Users\%username%\Desktop\WellOS2\Programdata\%command%.%type%\%command%.%type%-%lines%.wellcode" goto iftl :skip call %code% goto porep ::Tools :iftl %code% goto porep

Why should ErrorLevel not be possible? find/findstr (re-)set it if a/no match is found, so whan querying immediately afterwards, it will give the result; if you query ErrorLevel in a loop/block, use delayed expansion and use !ErrorLevel! rather than %ErrorLevel%... alternatively check whether or not the output of find/findstr is (not) empty, by parsing it with for /F, for instance... — aschipfl
– aschipfl, Commented Dec 16, 2015 at 1:31
Almost anything you run is going to set ERRORLEVEL, even if it just sets it to 0 to indicate success. If you must preserve it, then your best bet is to save it to a variable, run your commands, and then restore it. See stackoverflow.com/questions/6498460/… — Ryan Bemrose
– Ryan Bemrose, Commented Dec 16, 2015 at 2:11
I'm willing to bet that you were using %errorlevel% inside of a loop when you should have been using !errorlevel!. — SomethingDark
– SomethingDark, Commented Dec 16, 2015 at 3:41
You having problems with your code, but where and what type of problems? From your detailed description, my best answer is that there must be a bug in your code — jeb
– jeb, Commented Dec 16, 2015 at 8:59
By the line findstr /I /L "if" "C:\*\*.wellcode" goto iftl in the program opener, you want to do goto iftl in case a match is found? if so, just place && before goto iftl; see also my updated answer... — aschipfl
– aschipfl, Commented Dec 16, 2015 at 9:55

Magoo · Accepted Answer · 2015-12-15 23:14:17Z

0

findstr "targetstring" datafilename >flagfilename for %%a in (flagfilename) do if %%~za==0 echo not found for %%a in (flagfilename) do if %%~za neq 0 echo found

beyond that, your question is too vague.

answered Dec 15, 2015 at 23:14

Magoo

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2 Comments

Expto Over a year ago

I don't get the datafilename >flagfilename part of the first line.

Magoo Over a year ago

I have no idea what your datafile name is. You'd need to substitute it in here. You can use any name as a flagfile. This will be a file that will be created with a size of 0 or non-zero.

aschipfl · Accepted Answer · 2015-12-16 09:51:54Z

The following command returns all lines of a text file textfile.txt that contain the word word (remove the /I switch if you want the search to be case-sensitive):

findstr /I /L "word" "textfile.txt"

With for /F you can capture the output and test whether it is empty, as the loop does not iterate if no match is encountered:

set "FOUND=" for /F "delims=" %%F in (' findstr /I /L "word" "textfile.txt" ') do ( set "FOUND=Yes" ) if defined FOUND ( echo One or more matches found. rem do something... ) else ( echo No match found. rem do something else... )

Type for /? and if /? in command prompt to get details about the used commands.

There is also a way to use ErrorLevel implicitly, meaning you do not have to query its value by something like %ErrorLevel%, !ErrorLevel! or if ErrorLevel, namely when using conditional command separators:

the && separator executes the following command only in case the previous one succeeded, that is, it returned an ErrorLevel of 0; (findstr returns 0 in case a match is encountered;)
the || separator executes the following command only in case the previous one failed, that is, it returned an ErrorLevel other than 0; (findstr returns a non-zero ErrorLevel in case no match is encountered;)

The following line of code demonstrates the usage:

findstr /I /L "word" "textfile.txt" && (echo One or more matches found.) || echo (No match found.)

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