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.
19 #include <linux/types.h>
21 #include <libubox/uloop.h>
22 #include <libubox/blobmsg.h>
23 #include <libubox/list.h>
24 #include <libubox/ustream.h>
30 static struct blob_buf b;
31 static struct ubus_auto_conn conn;
32 static LIST_HEAD(clients);
41 static const struct blobmsg_policy read_policy[__READ_MAX] = {
42 [READ_LINES] = { .name = "lines", .type = BLOBMSG_TYPE_INT32 },
43 [READ_STREAM] = { .name = "stream", .type = BLOBMSG_TYPE_BOOL },
44 [READ_ONESHOT] = { .name = "oneshot", .type = BLOBMSG_TYPE_BOOL },
47 static const struct blobmsg_policy write_policy =
48 { .name = "event", .type = BLOBMSG_TYPE_STRING };
51 struct list_head list;
58 client_close(struct ustream *s)
60 struct client *cl = container_of(s, struct client, s.stream);
68 static void client_notify_state(struct ustream *s)
73 static void client_notify_write(struct ustream *s, int bytes)
75 if (ustream_pending_data(s, true))
82 log_fill_msg(struct blob_buf *b, struct log_head *l)
84 blobmsg_add_string(b, "msg", l->data);
85 blobmsg_add_u32(b, "id", l->id);
86 blobmsg_add_u32(b, "priority", l->priority);
87 blobmsg_add_u32(b, "source", l->source);
88 blobmsg_add_u64(b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
92 read_log(struct ubus_context *ctx, struct ubus_object *obj,
93 struct ubus_request_data *req, const char *method,
94 struct blob_attr *msg)
97 struct blob_attr *tb[__READ_MAX] = {};
103 bool oneshot = false;
110 blobmsg_parse(read_policy, __READ_MAX, tb, blob_data(msg), blob_len(msg));
112 count = blobmsg_get_u32(tb[READ_LINES]);
114 stream = blobmsg_get_bool(tb[READ_STREAM]);
115 if (tb[READ_ONESHOT])
116 oneshot = blobmsg_get_bool(tb[READ_ONESHOT]);
119 l = log_list(count, NULL);
121 if (pipe(fds) == -1) {
122 fprintf(stderr, "logd: failed to create pipe: %s\n", strerror(errno));
126 ubus_request_set_fd(ctx, req, fds[0]);
127 cl = calloc(1, sizeof(*cl));
128 cl->s.stream.notify_state = client_notify_state;
130 ustream_fd_init(&cl->s, cl->fd);
131 list_add(&cl->list, &clients);
132 while ((!tb[READ_LINES] || count) && l) {
133 blob_buf_init(&b, 0);
135 l = log_list(count, l);
136 ret = ustream_write(&cl->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
142 cl->s.stream.notify_write = client_notify_write;
143 client_notify_write(&cl->s.stream, 0);
146 blob_buf_init(&b, 0);
147 c = blobmsg_open_array(&b, "log");
148 while ((!tb[READ_LINES] || count) && l) {
149 e = blobmsg_open_table(&b, NULL);
151 blobmsg_close_table(&b, e);
152 l = log_list(count, l);
154 blobmsg_close_array(&b, c);
155 ubus_send_reply(ctx, req, b.head);
162 write_log(struct ubus_context *ctx, struct ubus_object *obj,
163 struct ubus_request_data *req, const char *method,
164 struct blob_attr *msg)
166 struct blob_attr *tb;
170 blobmsg_parse(&write_policy, 1, &tb, blob_data(msg), blob_len(msg));
172 event = blobmsg_get_string(tb);
173 log_add(event, strlen(event) + 1, SOURCE_SYSLOG);
180 static const struct ubus_method log_methods[] = {
181 UBUS_METHOD("read", read_log, read_policy),
182 { .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
185 static struct ubus_object_type log_object_type =
186 UBUS_OBJECT_TYPE("log", log_methods);
188 static struct ubus_object log_object = {
190 .type = &log_object_type,
191 .methods = log_methods,
192 .n_methods = ARRAY_SIZE(log_methods),
196 ubus_notify_log(struct log_head *l)
200 if (list_empty(&clients))
203 blob_buf_init(&b, 0);
204 blobmsg_add_string(&b, "msg", l->data);
205 blobmsg_add_u32(&b, "id", l->id);
206 blobmsg_add_u32(&b, "priority", l->priority);
207 blobmsg_add_u32(&b, "source", l->source);
208 blobmsg_add_u64(&b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
210 list_for_each_entry(c, &clients, list)
211 ustream_write(&c->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
217 ubus_connect_handler(struct ubus_context *ctx)
221 ret = ubus_add_object(ctx, &log_object);
223 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
226 fprintf(stderr, "log: connected to ubus\n");
230 main(int argc, char **argv)
232 int ch, log_size = 16;
234 signal(SIGPIPE, SIG_IGN);
235 while ((ch = getopt(argc, argv, "S:")) != -1) {
238 log_size = atoi(optarg);
248 conn.cb = ubus_connect_handler;
249 ubus_auto_connect(&conn);
253 ubus_auto_shutdown(&conn);