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init: add tty from cmdline to securetty

--- a/initramfs-init.in

+++ b/initramfs-init.in

@@ -136,10 +136,15 @@

 		[ "$tty" = "tty0" ] && continue

 		# do nothing if inittab already have the tty set up

-		grep -q "^$tty:" $sysroot/etc/inittab && continue

-		echo "# enable login on alternative console" >> $sysroot/etc/inittab

-		echo "$tty::respawn:/sbin/getty $line $speed $tty $term" \

-			>> $sysroot/etc/inittab

+		if ! grep -q "^$tty:" $sysroot/etc/inittab; then

+			echo "# enable login on alternative console" \

+				>> $sysroot/etc/inittab

+			echo "$tty::respawn:/sbin/getty $line $speed $tty $term" \

+				>> $sysroot/etc/inittab

+		fi

+		if [ -e "$sysroot"/etc/securetty ] && ! grep -q -w "$tty"; then

+			echo "$tty" >> "$sysroot"/etc/securetty

+		fi

 	done

 }