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);
40 static const struct blobmsg_policy read_policy[__READ_MAX] = {
41 [READ_LINES] = { .name = "lines", .type = BLOBMSG_TYPE_INT32 },
42 [READ_STREAM] = { .name = "stream", .type = BLOBMSG_TYPE_BOOL },
45 static const struct blobmsg_policy write_policy =
46 { .name = "event", .type = BLOBMSG_TYPE_STRING };
49 struct list_head list;
56 client_close(struct ustream *s)
58 struct client *cl = container_of(s, struct client, s.stream);
66 static void client_notify_state(struct ustream *s)
72 log_fill_msg(struct blob_buf *b, struct log_head *l)
75 blobmsg_add_string(b, "msg", l->data);
76 blobmsg_add_u32(b, "id", l->id);
77 blobmsg_add_u32(b, "priority", l->priority);
78 blobmsg_add_u32(b, "source", l->source);
79 blobmsg_add_u64(b, "time", l->ts.tv_sec * 1000LL);
83 read_log(struct ubus_context *ctx, struct ubus_object *obj,
84 struct ubus_request_data *req, const char *method,
85 struct blob_attr *msg)
88 struct blob_attr *tb[__READ_MAX];
96 blobmsg_parse(read_policy, __READ_MAX, tb, blob_data(msg), blob_len(msg));
98 count = blobmsg_get_u32(tb[READ_LINES]);
100 stream = blobmsg_get_bool(tb[READ_STREAM]);
105 if (pipe(fds) == -1) {
106 fprintf(stderr, "logd: failed to create pipe: %s\n", strerror(errno));
110 l = log_list(count, NULL);
112 ubus_request_set_fd(ctx, req, fds[0]);
113 cl = calloc(1, sizeof(*cl));
114 cl->s.stream.notify_state = client_notify_state;
116 ustream_fd_init(&cl->s, cl->fd);
117 list_add(&cl->list, &clients);
118 while ((!tb[READ_LINES] || count) && l) {
120 l = log_list(count, l);
121 ret = ustream_write(&cl->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
126 while ((!tb[READ_LINES] || count) && l) {
128 ubus_send_reply(ctx, req, b.head);
129 l = log_list(count, l);
137 write_log(struct ubus_context *ctx, struct ubus_object *obj,
138 struct ubus_request_data *req, const char *method,
139 struct blob_attr *msg)
141 struct blob_attr *tb;
145 blobmsg_parse(&write_policy, 1, &tb, blob_data(msg), blob_len(msg));
147 event = blobmsg_get_string(tb);
148 log_add(event, strlen(event) + 1, SOURCE_SYSLOG);
155 static const struct ubus_method log_methods[] = {
156 UBUS_METHOD("read", read_log, read_policy),
157 { .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
160 static struct ubus_object_type log_object_type =
161 UBUS_OBJECT_TYPE("log", log_methods);
163 static struct ubus_object log_object = {
165 .type = &log_object_type,
166 .methods = log_methods,
167 .n_methods = ARRAY_SIZE(log_methods),
171 ubus_notify_log(struct log_head *l)
175 if (list_empty(&clients))
178 blob_buf_init(&b, 0);
179 blobmsg_add_string(&b, "msg", l->data);
180 blobmsg_add_u32(&b, "id", l->id);
181 blobmsg_add_u32(&b, "priority", l->priority);
182 blobmsg_add_u32(&b, "source", l->source);
183 blobmsg_add_u64(&b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
185 list_for_each_entry(c, &clients, list)
186 ustream_write(&c->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
192 ubus_connect_handler(struct ubus_context *ctx)
196 ret = ubus_add_object(ctx, &log_object);
198 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
201 fprintf(stderr, "log: connected to ubus\n");
205 main(int argc, char **argv)
207 int ch, log_size = 16;
209 signal(SIGPIPE, SIG_IGN);
210 while ((ch = getopt(argc, argv, "S:")) != -1) {
213 log_size = atoi(optarg);
223 conn.cb = ubus_connect_handler;
224 ubus_auto_connect(&conn);