Support live-{top,premount,bottom} hooks

initramfs-tools support hooks for top, premount, bottom when booting
with boot=local or boot=nfs. Add similar support to live-boot when
booting with boot=live.

Closes: #884355
Signed-off-by: Benjamin Drung <benjamin.drung@profitbricks.com>

diff --git a/backend/initramfs-tools/live.script b/backend/initramfs-tools/live.script
index ff2915a..5bec741 100755 (executable)
--- a/backend/initramfs-tools/live.script
+++ b/backend/initramfs-tools/live.script
@@ -1,13 +1,59 @@
-#!/bin/sh
-
-#set -e
+# Live system filesystem mounting                      -*- shell-script -*-

 
 . /bin/live-boot
 
 
 . /bin/live-boot
 

-. /scripts/functions
+live_top()
+{
+       if [ "${live_top_used}" != "yes" ]; then
+               [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/live-top"
+               run_scripts /scripts/live-top
+               [ "$quiet" != "y" ] && log_end_msg
+       fi
+       live_top_used=yes
+}
+
+live_premount()
+{
+       if [ "${live_premount_used}" != "yes" ]; then
+               [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/live-premount"
+               run_scripts /scripts/live-premount
+               [ "$quiet" != "y" ] && log_end_msg
+       fi
+       live_premount_used=yes
+}
+
+live_bottom()
+{
+       if [ "${live_premount_used}" = "yes" ] || [ "${live_top_used}" = "yes" ]; then
+               [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/live-bottom"
+               run_scripts /scripts/live-bottom
+               [ "$quiet" != "y" ] && log_end_msg
+       fi
+       live_premount_used=no
+       live_top_used=no
+}
+

 
 

-mountroot ()
+mountroot()

 {
        # initramfs-tools entry point for live-boot is mountroot(); function
        Live
 }
 {
        # initramfs-tools entry point for live-boot is mountroot(); function
        Live
 }

+
+mount_top()
+{
+       # Note, also called directly in case it's overridden.
+       live_top
+}
+
+mount_premount()
+{
+       # Note, also called directly in case it's overridden.
+       live_premount
+}
+
+mount_bottom()
+{
+       # Note, also called directly in case it's overridden.
+       live_bottom
+}