1 files changed, 50 insertions, 0 deletions
diff --git a/main/kernel-hooks/kernel-hooks.trigger b/main/kernel-hooks/kernel-hooks.trigger
new file mode 100644
index 00000000000..5d05d3f54e4
--- /dev/null
+++ b/main/kernel-hooks/kernel-hooks.trigger
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+PROGNAME='kernel-hooks'
+HOOKS_DIR='/etc/kernel-hooks.d'
+
+[ -d $HOOKS_DIR ] || exit 0
+
+flavors_vers=
+for path in "$@"; do
+	name="${path##*/}"
+
+	case "$name" in
+		[0-9]*-[0-9]*-*) ;;  # go on
+		*) echo "$PROGNAME: ERROR: invalid kernel version: $name!" >&2; exit 1;;
+	esac
+
+	flavor=${name#*-}; flavor=${flavor#*-}
+	ver=${name%-$flavor}
+	flavors_vers="$flavors_vers $flavor:$ver"
+done
+
+for flavor in $(printf '%s\n' $flavors_vers | sort | cut -d: -f1 | uniq); do
+	relfile=/usr/share/kernel/$flavor/kernel.release
+
+	new_ver=
+	old_ver=
+	for fv in $flavors_vers; do
+		[ "${fv%:*}" = "$flavor" ] || continue
+		ver=${fv#*:}
+
+		[ "$(cat "$relfile" 2>/dev/null)" = "$ver-$flavor" ] \
+			&& new_ver=$ver \
+			|| old_ver=$ver
+	done
+
+	for hook in $HOOKS_DIR/*; do
+		[ -x "$hook" ] || continue
+		name=${hook##*/}
+
+		echo "$PROGNAME: executing hook $name ($flavor, $new_ver, $old_ver)" >&2
+
+		$hook "$flavor" "$new_ver" "$old_ver" \
+			|| echo "$PROGNAME: ERROR: hook $name failed" >&2
+	done
+done
+
+# Triggers exiting with a non-zero status cause headaches. APK marks the
+# corresponding package and the world as broken. Consequently, it exists with
+# status 1 even after e.g. successful installation of a new package.
+exit 0