Implement a hook-system that allows to add custom code to the initscripts at certain places

A function add_hook can be called from functions.d to register a hook function. The existing hooks
are based on suggestions from Michael Towers (larch) and on the implementation of initscripts-extras-fbsplash
which currently uses the strings passed to stat_busy and stat_done for this. More hooks can
be added if requested.

The implementation uses associative arrays and will thus only work with bash 4 or later

1 files changed, 8 insertions, 0 deletions

diff --git a/rc.shutdown b/rc.shutdown
index e2a4a84..5921e1c 100755
--- a/rc.shutdown
+++ b/rc.shutdown
@@ -6,6 +6,8 @@
 . /etc/rc.conf
 . /etc/rc.d/functions
 
+run_hook start rc.shutdown
+
 # avoid staircase effect
 /bin/stty onlcr
 
@@ -41,6 +43,8 @@ if [ "$PREVLEVEL" = "3" -o "$PREVLEVEL" = "5" ]; then
 	done
 fi
 
+run_hook prekillall rc.shutdown
+
 # Terminate all processes
 stat_busy "Sending SIGTERM To Processes"
 /sbin/killall5 -15 &> /dev/null
@@ -52,6 +56,8 @@ stat_busy "Sending SIGKILL To Processes"
 /bin/sleep 1
 stat_done
 
+run_hook postkillall rc.shutdown
+
 stat_busy "Saving Random Seed"
 RANDOM_SEED=/var/lib/misc/random-seed
 [ -d $(dirname $RANDOM_SEED) ] || mkdir -p $(dirname $RANDOM_SEED)
@@ -132,6 +138,8 @@ stat_busy "Remounting Root Filesystem Read-only"
 /bin/mount -n -o remount,ro /
 stat_done
 
+run_hook poweroff rc.shutdown
+
 # Power off or reboot
 if [ "$RUNLEVEL" = "0" ]; then
 	printsep