how to check OR condition using if statement in batch script - batch-file

Question

I have command list which will be executed on several server. There is 2 specific command which gets the logs from system and I need to parse these 2 log files to get only required data, which is currently working from below code. but am not able figure out how to check if command executed is that of those 2 log command if so, proceed with rest of the logic, if not then just skip the next few lines. I am not able to find how can we use if statement in batch script which can have OR condition as well.
although am using for loop currently in which am able to check only one command but not both
command list file content :
ipconfig
sys1/log1
Fdisk
map1/log1
from the above command, I would like to check if either of the command ie, sys1/log1 or map1/log1 then perform below logic
code :
Version:1.0
for /f %%i in ('findstr /li /c:"sys1/log1" /c:"ipconfig" !MyLog!') do (
set "wanted=WARNING MINOR MAJOR"
echo echo severity date time Description > !MyLog!_out.log
(
for /f "tokens=1,2 delims==" %%a in ('type !MyLog!^|findstr "severity= date= time= description="') do (
if "%%a"==" severity" echo\
REM this is four SPACES above before severity
<nul set /p "=%%b "
REM above there is a SPACE and a TAB after %%b
)
echo/
) >>!MyLog!_out.log
type !MyLog!_out.log | findstr /b "severity %wanted%" > !MyLog!_out.log
)
Version:1.1
1 for /f %%i in ('findstr /li /c:"sys1/log1" /c:"ipconfig" !MyLog!') do 2(
3 set "wanted=WARNING MINOR MAJOR"
4 echo echo severity date time Description > !MyLog!_out.log
5 (
6 for /f "tokens=1,2 delims==" %%a in ('type !MyLog!^|findstr "severity= date= time= description="') do (
7 if "%%a"==" severity" echo\
8 REM this is four SPACES above before severity
9 <nul set /p "=%%b "
10 REM above there is a SPACE and a TAB after %%b
11 )
12 echo/
13 ) >>!MyLog!_out.log
14 for %%a in (!MyLog!) do (
15 echo %%a | find /n /i !wanted! >> !MyLog!_out.log
16 echo %%a
17 )
18 )
Any idea/suggestion/help please.
MyLog.log output :
echo severity date time Description
MINOR 01/04/2015 08:56 Maintenance note: App logs cleared through sys tool
WARNING 02/22/2015 19:59 POST Error: Caching will be enabled once Super-Cap has been charged. No action is required.
WARNING 03/13/2015 14:34 POST Error: Caching will be enabled once Super-Cap has been charged. No action is required.
MAJOR 10/13/2015 15:03 Network Adapter Link Down (Slot 0, Port 1)
MAJOR 01/13/2016 13:03 Network Adapter Link Down (Slot 0, Port 0)
MAJOR 01/21/2016 02:39 Network Adapter Link Down (Slot 0, Port 0)
MAJOR 06/09/2016 01:01 Network Adapter Link Down (Slot 0, Port 0)

Answer 1

Once you implemented rojo's suggestion, incorporate this script instead of yours inner loop inside the outer FOR loop, and post here if any issues:
#echo off
setlocal enabledelayedexpansion
-------------------------------------
rem Inside your outer FOR loop, add this construct
set "wanted=WARNING MINOR MAJOR"
for %%a in ("%wanted%") do (
for %%b in (!MyLog!) do (
echo %%b | find /n /i %%a >nul >> !MyLog!_out.log
echo %%a %%b))