2 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
18 #include <linux/types.h>
20 #include <libubox/uloop.h>
21 #include <libubox/blobmsg.h>
22 #include <libubox/list.h>
23 #include <libubox/ustream.h>
29 static struct blob_buf b;
30 static struct ubus_auto_conn conn;
31 static LIST_HEAD(clients);
33 static const struct blobmsg_policy read_policy =
34 { .name = "lines", .type = BLOBMSG_TYPE_INT32 };
36 static const struct blobmsg_policy write_policy =
37 { .name = "event", .type = BLOBMSG_TYPE_STRING };
40 struct list_head list;
47 client_close(struct ustream *s)
49 struct client *cl = container_of(s, struct client, s.stream);
58 client_notify_write(struct ustream *s, int bytes)
60 if (s->w.data_bytes < 128 && ustream_read_blocked(s))
61 ustream_set_read_blocked(s, false);
64 static void client_notify_state(struct ustream *s)
70 return client_close(s);
74 read_log(struct ubus_context *ctx, struct ubus_object *obj,
75 struct ubus_request_data *req, const char *method,
76 struct blob_attr *msg)
85 blobmsg_parse(&read_policy, 1, &tb, blob_data(msg), blob_len(msg));
87 count = blobmsg_get_u32(tb);
91 ubus_request_set_fd(ctx, req, fds[0]);
93 cl = calloc(1, sizeof(*cl));
94 cl->s.stream.notify_write = client_notify_write;
95 cl->s.stream.notify_state = client_notify_state;
97 ustream_fd_init(&cl->s, cl->fd);
98 list_add(&cl->list, &clients);
99 l = log_list(count, NULL);
100 while ((!tb || count) && l) {
101 blob_buf_init(&b, 0);
102 blobmsg_add_string(&b, "msg", l->data);
103 blobmsg_add_u32(&b, "id", l->id);
104 blobmsg_add_u32(&b, "priority", l->priority);
105 blobmsg_add_u32(&b, "source", l->source);
106 blobmsg_add_u64(&b, "time", l->ts.tv_sec);
107 l = log_list(count, l);
108 if (ustream_write(&cl->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false) <= 0)
115 write_log(struct ubus_context *ctx, struct ubus_object *obj,
116 struct ubus_request_data *req, const char *method,
117 struct blob_attr *msg)
119 struct blob_attr *tb;
123 blobmsg_parse(&write_policy, 1, &tb, blob_data(msg), blob_len(msg));
125 event = blobmsg_get_string(tb);
126 log_add(event, strlen(event) + 1, SOURCE_SYSLOG);
133 static const struct ubus_method log_methods[] = {
134 { .name = "read", .handler = read_log, .policy = &read_policy, .n_policy = 1 },
135 { .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
138 static struct ubus_object_type log_object_type =
139 UBUS_OBJECT_TYPE("log", log_methods);
141 static struct ubus_object log_object = {
143 .type = &log_object_type,
144 .methods = log_methods,
145 .n_methods = ARRAY_SIZE(log_methods),
149 ubus_notify_log(struct log_head *l)
153 if (list_empty(&clients))
156 list_for_each_entry(c, &clients, list) {
157 blob_buf_init(&b, 0);
158 blobmsg_add_string(&b, "msg", l->data);
159 blobmsg_add_u32(&b, "id", l->id);
160 blobmsg_add_u32(&b, "priority", l->priority);
161 blobmsg_add_u32(&b, "source", l->source);
162 blobmsg_add_u64(&b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
163 ustream_write(&c->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
168 ubus_connect_handler(struct ubus_context *ctx)
172 ret = ubus_add_object(ctx, &log_object);
174 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
175 fprintf(stderr, "log: connected to ubus\n");
179 main(int argc, char **argv)
181 signal(SIGPIPE, SIG_IGN);
185 conn.cb = ubus_connect_handler;
186 ubus_auto_connect(&conn);