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+# procd API:
+#
+# procd_open_service(name, [script]):
+# Initialize a new procd command message containing a service with one or more instances
+#
+# procd_close_service()
+# Send the command message for the service
+#
+# procd_open_instance([name]):
+# Add an instance to the service described by the previous procd_open_service call
+#
+# procd_set_param(type, [value...])
+# Available types:
+# command: command line (array).
+# env: environment variable (passed to the process)
+# data: arbitrary name/value pairs for detecting config changes (table)
+# file: configuration files (array)
+# netdev: bound network device (detects ifindex changes)
+#
+# No space separation is done for arrays/tables - use one function argument per command line argument
+#
+# procd_close_instance():
+# Complete the instance being prepared
+#
+# procd_kill(service, [instance]):
+# Kill a service instance (or all instances)
+#
+
+. $IPKG_INSTROOT/usr/share/libubox/jshn.sh
+
+_PROCD_SERVICE=
+
+_procd_call() {
+ local old_cb
+
+ json_set_namespace procd old_cb
+ "$@"
+ json_set_namespace $old_cb
+}
+
+_procd_wrapper() {
+ while [ -n "$1" ]; do
+ eval "$1() { _procd_call _$1 \"\$@\"; }"
+ shift
+ done
+}
+
+_procd_ubus_call() {
+ local cmd="$1"
+
+ ubus call service "$cmd" "$(json_dump)"
+ json_cleanup
+}
+
+_procd_open_service() {
+ local name="$1"
+ local script="$2"
+
+ _PROCD_SERVICE="$name"
+ _PROCD_INSTANCE_SEQ=0
+
+ json_init
+ json_add_string name "$name"
+ [ -n "$script" ] && json_add_string script "$script"
+ json_add_object instances
+}
+
+_procd_close_service() {
+ json_close_object
+ _procd_ubus_call set
+}
+
+_procd_add_array_data() {
+ while [ -n "$1" ]; do
+ json_add_string "" "$1"
+ shift
+ done
+}
+
+_procd_add_array() {
+ json_add_array "$1"
+ shift
+ _procd_add_array_data "$@"
+ json_close_array
+}
+
+_procd_add_table_data() {
+ while [ -n "$1" ]; do
+ local var="${1%%=*}"
+ local val="${1#*=}"
+ [[ "$1" == "$val" ]] && val=
+ json_add_string "$var" "$val"
+ shift
+ done
+}
+
+_procd_add_table() {
+ json_add_object "$1"
+ shift
+ _procd_add_table_data "$@"
+ json_close_object
+}
+
+_procd_open_instance() {
+ local name="$1"; shift
+
+ _PROCD_INSTANCE_SEQ="$(($_PROCD_INSTANCE_SEQ + 1))"
+ name="${name:-instance$_PROCD_INSTANCE_SEQ}"
+ json_add_object "$name"
+}
+
+_procd_set_param() {
+ local type="$1"; shift
+
+ case "$type" in
+ env|data)
+ _procd_add_table "$type" "$@"
+ ;;
+ command|netdev|file)
+ _procd_add_array "$type" "$@"
+ ;;
+ nice)
+ json_add_int "$type" "$1"
+ ;;
+ esac
+}
+
+_procd_append_param() {
+ local type="$1"; shift
+
+ json_select "$type"
+ case "$type" in
+ env|data)
+ _procd_add_table_data "$@"
+ ;;
+ command|netdev|file)
+ _procd_add_array_data "$@"
+ ;;
+ esac
+ json_select ..
+}
+
+_procd_close_instance() {
+ json_close_object
+}
+
+_procd_add_instance() {
+ _procd_open_instance
+ _procd_set_command "$@"
+ _procd_close_instance
+}
+
+_procd_kill() {
+ local service="$1"
+ local instance="$2"
+
+ json_init
+ [ -n "$service" ] && json_add_string service "$service"
+ [ -n "$instance" ] && json_add_string instance "$instance"
+ _procd_ubus_call delete
+}
+
+_procd_wrapper \
+ procd_open_service \
+ procd_close_service \
+ procd_add_instance \
+ procd_open_instance \
+ procd_close_instance \
+ procd_set_param \
+ procd_append_param \
+ procd_kill