set REPOS=%1
set REV=%2
set USER=%3
set PROPNAME=%4
set ACTION=%5

rem Only allow log messages to be changed.
if "%PROPNAME%" NEQ "svn:log" goto ERR_CHANGE
exit 0

:ERR_EMPTY
echo Property '%PROPNAME%' cannot be empty.
exit 1

:ERR_CHANGE
echo Property '%PROPNAME%' cannot be changed.
exit 1