Hosts File Util

hostswap.bat

@echo off

REM Usage
REM
REM hostswap.bat <ip address> <hostname>
REM     This will add the given information to the hosts file,
REM     and save the original file to hosts.bak.
REM
REM hostswap.bat -revert
REM     This will swap hosts and hosts.bak.
REM
REM hostswap.bat -reset
REM     This will restore the default Windows (empty) hosts file.

set hostfile=c:\windows\system32\drivers\etc\hosts
set hostfilebak=c:\windows\system32\drivers\etc\hosts.bak
set hostfilestaging=c:\windows\system32\drivers\etc\hosts.staging

echo Backup of existing hosts file will be saved as hosts.bak

IF "%1" == "-revert" (
    REM backs up the current config and restores the .bak
    copy %hostfilebak% %hostfilestaging%
    copy %hostfile% %hostfilebak%
    copy %hostfilestaging% %hostfile%
    del %hostfilestaging%

    GOTO :EOF
) ELSE IF "%1" == "-reset" (
    REM Resets host file to Windows default
    copy %hostfile% %hostfilebak%
    del %hostfile%

    echo # Copyright ^(c^) 1993-2006 Microsoft Corp. >> %hostfile%
    echo # >> %hostfile%
    echo # This is a sample HOSTS file used by Microsoft TCP/IP for Windows. >> %hostfile%
    echo # >> %hostfile%
    echo # This file contains the mappings of IP addresses to host names. Each >> %hostfile%
    echo # entry should be kept on an individual line. The IP address should >> %hostfile%
    echo # be placed in the first column followed by the corresponding host name. >> %hostfile%
    echo # The IP address and the host name should be separated by at least one >> %hostfile%
    echo # space. >> %hostfile%
    echo # >> %hostfile%
    echo # Additionally, comments ^(such as these^) may be inserted on individual >> %hostfile%
    echo # lines or following the machine name denoted by a '#' symbol. >> %hostfile%
    echo # >> %hostfile%
    echo # For example: >> %hostfile%
    echo # >> %hostfile%
    echo #      102.54.94.97     rhino.acme.com          # source server >> %hostfile%
    echo #       38.25.63.10     x.acme.com              # x client host >> %hostfile%
    echo # localhost name resolution is handle within DNS itself. >> %hostfile%
    echo #       127.0.0.1       localhost >> %hostfile%
    echo #       ::1             localhost >> %hostfile%
    
    GOTO :EOF
)
) ELSE (
    REM backs up the current config and adds the arguments as a new entry
    copy %hostfile% %hostfilebak%
    echo %* >> %hostfile%
)