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);
34 static const struct blobmsg_policy read_policy =
35 { .name = "lines", .type = BLOBMSG_TYPE_INT32 };
37 static const struct blobmsg_policy write_policy =
38 { .name = "event", .type = BLOBMSG_TYPE_STRING };
41 struct list_head list;
48 client_close(struct ustream *s)
50 struct client *cl = container_of(s, struct client, s.stream);
58 static void client_notify_state(struct ustream *s)
64 read_log(struct ubus_context *ctx, struct ubus_object *obj,
65 struct ubus_request_data *req, const char *method,
66 struct blob_attr *msg)
76 blobmsg_parse(&read_policy, 1, &tb, blob_data(msg), blob_len(msg));
78 count = blobmsg_get_u32(tb);
81 if (pipe(fds) == -1) {
82 fprintf(stderr, "logd: failed to create pipe: %s\n", strerror(errno));
85 ubus_request_set_fd(ctx, req, fds[0]);
86 cl = calloc(1, sizeof(*cl));
87 cl->s.stream.notify_state = client_notify_state;
89 ustream_fd_init(&cl->s, cl->fd);
90 list_add(&cl->list, &clients);
91 l = log_list(count, NULL);
92 while ((!tb || count) && l) {
94 blobmsg_add_string(&b, "msg", l->data);
95 blobmsg_add_u32(&b, "id", l->id);
96 blobmsg_add_u32(&b, "priority", l->priority);
97 blobmsg_add_u32(&b, "source", l->source);
98 blobmsg_add_u64(&b, "time", l->ts.tv_sec * 1000LL);
99 l = log_list(count, l);
100 ret = ustream_write(&cl->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
109 write_log(struct ubus_context *ctx, struct ubus_object *obj,
110 struct ubus_request_data *req, const char *method,
111 struct blob_attr *msg)
113 struct blob_attr *tb;
117 blobmsg_parse(&write_policy, 1, &tb, blob_data(msg), blob_len(msg));
119 event = blobmsg_get_string(tb);
120 log_add(event, strlen(event) + 1, SOURCE_SYSLOG);
127 static const struct ubus_method log_methods[] = {
128 { .name = "read", .handler = read_log, .policy = &read_policy, .n_policy = 1 },
129 { .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
132 static struct ubus_object_type log_object_type =
133 UBUS_OBJECT_TYPE("log", log_methods);
135 static struct ubus_object log_object = {
137 .type = &log_object_type,
138 .methods = log_methods,
139 .n_methods = ARRAY_SIZE(log_methods),
143 ubus_notify_log(struct log_head *l)
147 if (list_empty(&clients))
150 blob_buf_init(&b, 0);
151 blobmsg_add_string(&b, "msg", l->data);
152 blobmsg_add_u32(&b, "id", l->id);
153 blobmsg_add_u32(&b, "priority", l->priority);
154 blobmsg_add_u32(&b, "source", l->source);
155 blobmsg_add_u64(&b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
157 list_for_each_entry(c, &clients, list)
158 ustream_write(&c->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
164 ubus_connect_handler(struct ubus_context *ctx)
168 ret = ubus_add_object(ctx, &log_object);
170 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
173 fprintf(stderr, "log: connected to ubus\n");
177 main(int argc, char **argv)
179 int ch, log_size = 16;
181 signal(SIGPIPE, SIG_IGN);
182 while ((ch = getopt(argc, argv, "S:")) != -1) {
185 log_size = atoi(optarg);
195 conn.cb = ubus_connect_handler;
196 ubus_auto_connect(&conn);