send error messages back to the client in hook scripts..

just trying a quick example.. here is my pre commit hook..

#make sure that the log message contains some text.
REPOS="$1"
TXN="$2"
SVNLOOK=/usr/bin/svnlook
$SVNLOOK log -t "$TXN" "$REPOS" | grep "[a-zA-Z0-9]" > /dev/null || exit
"Please enter a commit message"

It denies me commits if no text is entered, but I don't see the message, is
this the correct way to send it back to the client? Thanks all..
Received on Thu Aug 9 22:53:25 2007