Revise part of r322327 in release/packages/kernel.ucl.

It appears I misunderstand process forking and signal handling in
how the pre-/post-install scripts are executed internally by pkg(8).
In some cases (not all), ^C when prompted to cancel the kernel
package update will stop the pre-install script from executing, but
allow pkg(8) to continue extracting the package when it is not the
intent.

In order to keep somewhat of an anti-footshooting measure in place,
print the recommendation to install the kernel package first if
ASSUME_ALWAYS_YES is false and TERM is set, then sleep for 5 seconds
to allow the user to see the message.

MFC after:	5 days
MFC with:	r322327
X-MFC-Note:	Maybe not until I am happy with this..
Sponsored by:	The FreeBSD Foundation

1 files changed, 4 insertions, 10 deletions

diff --git a/release/packages/kernel.ucl b/release/packages/kernel.ucl
index 67d7bf53db5d8..4edf5657ffd33 100644
--- a/release/packages/kernel.ucl
+++ b/release/packages/kernel.ucl
@@ -25,6 +25,9 @@ scripts: {
 			continue
 			;;
 	esac
+	if [ -z "${TERM}" ]; then
+		exit 0
+	fi
 	echo "****************************************************************"
 	echo "It is recommended to install the FreeBSD-%PKGNAME% package"
 	echo "with:"
@@ -37,16 +40,7 @@ scripts: {
 	echo "	pkg upgrade"
 	echo
 	echo "****************************************************************"
-	echo
-	echo "Do you want to continue anyway?"
-	echo "[Enter] to continue, ^C to cancel."
-	echo
-	read ANSWER
-	case ${ANSWER} in
-		*)
-			continue
-			;;
-	esac
+	sleep 5
 EOD
 
 	post-install = <<EOD