procd: support generic mount triggers and clean up

Allow init scripts to trigger free-form actions by exposing
procd_add_action_mount_trigger.
Clean up mount trigger wrappers while at it to reduce code duplication.

Signed-off-by: Daniel Golle <[email protected]>

package/system/procd/files/procd.sh

@@ -363,14 +363,15 @@ _procd_add_mount_trigger() {
 }
 
 _procd_add_action_mount_trigger() {
-	local script=$(readlink "$initscript")
-	local name=$(basename ${script:-$initscript})
 	local action="$1"
-	local mpath
 	shift
+	local mountpoints="$(procd_get_mountpoints "$@")"
+	[ "${mountpoints//[[:space:]]}" ] || return 0
+	local script=$(readlink "$initscript")
+	local name=$(basename ${script:-$initscript})
 
 	_procd_open_trigger
-	_procd_add_mount_trigger mount.add $action "$@"
+	_procd_add_mount_trigger mount.add $action "$mountpoints"
 	_procd_close_trigger
 }
 
@@ -384,7 +385,7 @@ procd_get_mountpoints() {
 			target="${target%%/}/"
 			[ "$path" != "${path##$target}" ] && echo "${target%%/}"
 		}
-
+		local mpath
 		config_load fstab
 		for mpath in "$@"; do
 			config_foreach __procd_check_mount mount "$mpath"
@@ -393,15 +394,11 @@ procd_get_mountpoints() {
 }
 
 _procd_add_restart_mount_trigger() {
-	local mountpoints="$(procd_get_mountpoints "$@")"
-	[ "${mountpoints//[[:space:]]}" ] &&
-		_procd_add_action_mount_trigger restart $mountpoints
+	_procd_add_action_mount_trigger restart "$@"
 }
 
 _procd_add_reload_mount_trigger() {
-	local mountpoints="$(procd_get_mountpoints "$@")"
-	[ "${mountpoints//[[:space:]]}" ] &&
-		_procd_add_action_mount_trigger reload $mountpoints
+	_procd_add_action_mount_trigger reload "$@"
 }
 
 _procd_add_raw_trigger() {
@@ -638,6 +635,7 @@ _procd_wrapper \
 	procd_add_mount_trigger \
 	procd_add_reload_trigger \
 	procd_add_reload_interface_trigger \
+	procd_add_action_mount_trigger \
 	procd_add_reload_mount_trigger \
 	procd_add_restart_mount_trigger \
 	procd_open_trigger \