feature/kickstart: allow to disable kickstart from cmdline

A default value has been added to avoid requiring the ksfile= parameter
to be present at all times. Now if the ksfile= parameter is not
specified, "/etc/ks.conf.d/default" will be used.

At the same time, the "noksfile" parameter was added to turn off
kickstart execution or alternatively specify ksfile=none.

Signed-off-by: Alexey Gladkov <gladkov.alexey@gmail.com>

Author: legionus

features/kickstart/bin/get-ks-configs

@@ -3,6 +3,7 @@
 
 DIR="$WORKDIR/root"
 mkdir -p -- "$DIR/etc/ks.conf.d"
+:> "$DIR"/etc/ks.conf.d/none
 
 for ks in ${KICKSTART_CONFIGS-}; do
 	cp -f -- "$ks" "$DIR"/etc/ks.conf.d/

features/kickstart/data/etc/initrd/cmdline.d/kickstart

@@ -1 +1,2 @@
-register_parameter string KSFILE
+register_parameter string KSFILE default
+register_parameter bool NOKSFILE

features/kickstart/data/etc/rc.d/init.d/kickstart

@@ -16,9 +16,9 @@
 
 . /.initrd/initenv
 
-[ -n "${KSFILE-}" ] || exit 0
+[ -z "${NOKSFILE-}" ] || exit 0
 
-[ -z "${KSFILE##/*}" ] ||
+[ -n "${KSFILE-}" ] && [ -z "${KSFILE##/*}" ] ||
 	KSFILE="/etc/ks.conf.d/$KSFILE"
 
 if [ -s "$KSFILE" ]; then

features/kickstart/data/etc/rc.d/init.d/kickstart-prepare

@@ -17,9 +17,14 @@
 
 . /.initrd/initenv
 
-[ -n "${KSFILE-}" ] || exit 0
+[ -z "${NOKSFILE-}" ] || exit 0
 
-. uevent-sh-functions
+[ -n "${KSFILE-}" ] && [ -z "${KSFILE##/*}" ] ||
+	KSFILE="/etc/ks.conf.d/$KSFILE"
 
-mkdir -p -- "$uevent_confdb/queue/pause/udev"
-mkdir -p -- "$uevent_confdb/queue/pause/md-raid-member"
+if [ -s "$KSFILE" ]; then
+	. uevent-sh-functions
+
+	mkdir -p -- "$uevent_confdb/queue/pause/udev"
+	mkdir -p -- "$uevent_confdb/queue/pause/md-raid-member"
+fi