I've this batch file to execute.
@echo off
set /a count=0
for /f "tokens=1delims=:" %%i in ('findstr /n "^" "foto1.txt"') do set /a count=%%i
set /a rd=%random%%%count
if %rd% equ 0 (set "skip=") else set "skip=skip=%rd%"
set "found="
for /f "%skip%tokens=1*delims=:" %%i in ('findstr /n "^" "foto1.txt"') do if not defined found set "found=%%i"&set "var=%%j"
echo.%var%
break > urlfoto1.txt
echo %var% >> urlfoto1.txt
set /a count=0
for /f "tokens=1delims=:" %%i in ('findstr /n "^" "foto2.txt"') do set /a count=%%i
set /a rd=%random%%%count
if %rd% equ 0 (set "skip=") else set "skip=skip=%rd%"
set "found="
for /f "%skip%tokens=1*delims=:" %%i in ('findstr /n "^" "foto2.txt"') do if not defined found set "found=%%i"&set "var=%%j"
echo.%var%
break > urlfoto2.txt
echo %var% >> urlfoto2.txt
set /a count=0
for /f "tokens=1delims=:" %%i in ('findstr /n "^" "foto3.txt"') do set /a count=%%i
set /a rd=%random%%%count
if %rd% equ 0 (set "skip=") else set "skip=skip=%rd%"
set "found="
for /f "%skip%tokens=1*delims=:" %%i in ('findstr /n "^" "foto3.txt"') do if not defined found set "found=%%i"&set "var=%%j"
echo.%var%
break > urlfoto3.txt
echo %var% >> urlfoto3.txt
This script is generating random jpg url from a list on a file and create a txt new file with 1 random jpg url.
When I exectute it manually, it work fine. But when I go to scheduling it with Windows Task Scheduler I retrieve a (0xFF) ERROR. What does (0xff) mean? And why the scheduling is not working?
And similarly to LotPings answer:
@Echo Off
CD /D "%~dp0"
For %%A In (1 2 3) Do Call :Sub "%%A"
Pause
GoTo :EOF
:Sub
For /F "Delims==" %%A In ('Set line[ 2^>Nul') Do Set "%%A="
Set "total="&Set "randlinenum="
For /F "Tokens=1*Delims=[]" %%A In ('Find /V /N ""^<"foto%~1.txt"'
)Do Set "line[%%A]=%%B"&Set "total=%%A"
Set /A randlinenum=1+(%RANDOM% %% total)
SetLocal EnableDelayedExpansion
Echo(!line[%randlinenum%]!
(Echo(!line[%randlinenum%]!)>"urlfoto%~1.txt"
EndLocal
Exit /B
Please note that the Find /V /N "", (or FindStr /N "^"), construct will also include any empty lines, so if those exist in any of your foto* files this could feasibly randomly select and output an empty line.