service: fix a leftover debug hack
[project/procd.git] / service / watch.c
1 /*
2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #include <stdlib.h>
16 #include <unistd.h>
17
18 #include <libubox/blobmsg_json.h>
19
20 #include "../procd.h"
21
22 struct watch_object {
23 struct list_head list;
24
25 void *id;
26 char *name;
27 };
28
29 struct watch_subscribe {
30 struct uloop_timeout t;
31 uint32_t id;
32 };
33
34 static struct ubus_event_handler watch_event;
35 static struct ubus_subscriber watch_subscribe;
36 static LIST_HEAD(watch_objects);
37
38 static void watch_subscribe_cb(struct ubus_context *ctx, struct ubus_event_handler *ev,
39 const char *type, struct blob_attr *msg)
40 {
41 static const struct blobmsg_policy policy = {
42 "path", BLOBMSG_TYPE_STRING
43 };
44 struct watch_object *o;
45 struct blob_attr *attr;
46 const char *path;
47
48 DEBUG(3, "ubus event %s\n", type);
49 if (strcmp(type, "ubus.object.add") != 0)
50 return;
51
52 blobmsg_parse(&policy, 1, &attr, blob_data(msg), blob_len(msg));
53 if (!attr)
54 return;
55
56 path = blobmsg_data(attr);
57 DEBUG(3, "ubus path %s\n", path);
58
59 list_for_each_entry(o, &watch_objects, list) {
60 unsigned int id;
61
62 if (strcmp(o->name, path))
63 continue;
64 if (ubus_lookup_id(ctx, path, &id))
65 continue;
66 if (!ubus_subscribe(ctx, &watch_subscribe, id))
67 return;
68 ERROR("failed to suscribe %d\n", id);
69 }
70 }
71
72 void
73 watch_add(const char *_name, void *id)
74 {
75 int len = strlen(_name);
76 char *name;
77 struct watch_object *o = calloc_a(sizeof(*o), &name, len + 1);
78
79 o->name = name;
80 strcpy(name, _name);
81 o->id = id;
82 list_add(&o->list, &watch_objects);
83 }
84
85 void
86 watch_del(void *id)
87 {
88 struct watch_object *t, *n;
89
90 list_for_each_entry_safe(t, n, &watch_objects, list) {
91 if (t->id != id)
92 continue;
93 list_del(&t->list);
94 free(t);
95 }
96 }
97
98 static int
99 watch_notify_cb(struct ubus_context *ctx, struct ubus_object *obj,
100 struct ubus_request_data *req, const char *method,
101 struct blob_attr *msg)
102 {
103 if (debug >= 3) {
104 char *str;
105
106 str = blobmsg_format_json(msg, true);
107 DEBUG(3, "Received ubus notify '%s': %s\n", method, str);
108 free(str);
109 }
110
111 trigger_event(method, msg);
112 return 0;
113 }
114
115 void
116 watch_ubus(struct ubus_context *ctx)
117 {
118 watch_event.cb = watch_subscribe_cb;
119 watch_subscribe.cb = watch_notify_cb;
120 if (ubus_register_event_handler(ctx, &watch_event, "ubus.object.add"))
121 ERROR("failed to add ubus event handler\n");
122 if (ubus_register_subscriber(ctx, &watch_subscribe))
123 ERROR("failed to register ubus subscriber\n");
124 }