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);
59 client_notify_write(struct ustream *s, int bytes)
63 static void client_notify_state(struct ustream *s)
69 read_log(struct ubus_context *ctx, struct ubus_object *obj,
70 struct ubus_request_data *req, const char *method,
71 struct blob_attr *msg)
80 blobmsg_parse(&read_policy, 1, &tb, blob_data(msg), blob_len(msg));
82 count = blobmsg_get_u32(tb);
85 if (pipe(fds) == -1) {
86 fprintf(stderr, "logd: failed to create pipe: %s\n", strerror(errno));
89 ubus_request_set_fd(ctx, req, fds[0]);
90 cl = calloc(1, sizeof(*cl));
91 cl->s.stream.notify_write = client_notify_write;
92 cl->s.stream.notify_state = client_notify_state;
94 ustream_fd_init(&cl->s, cl->fd);
95 list_add(&cl->list, &clients);
96 l = log_list(count, NULL);
97 while ((!tb || count) && l) {
99 blobmsg_add_string(&b, "msg", l->data);
100 blobmsg_add_u32(&b, "id", l->id);
101 blobmsg_add_u32(&b, "priority", l->priority);
102 blobmsg_add_u32(&b, "source", l->source);
103 blobmsg_add_u64(&b, "time", l->ts.tv_sec * 1000LL);
104 l = log_list(count, l);
105 if (ustream_write(&cl->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false) <= 0)
112 write_log(struct ubus_context *ctx, struct ubus_object *obj,
113 struct ubus_request_data *req, const char *method,
114 struct blob_attr *msg)
116 struct blob_attr *tb;
120 blobmsg_parse(&write_policy, 1, &tb, blob_data(msg), blob_len(msg));
122 event = blobmsg_get_string(tb);
123 log_add(event, strlen(event) + 1, SOURCE_SYSLOG);
130 static const struct ubus_method log_methods[] = {
131 { .name = "read", .handler = read_log, .policy = &read_policy, .n_policy = 1 },
132 { .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
135 static struct ubus_object_type log_object_type =
136 UBUS_OBJECT_TYPE("log", log_methods);
138 static struct ubus_object log_object = {
140 .type = &log_object_type,
141 .methods = log_methods,
142 .n_methods = ARRAY_SIZE(log_methods),
146 ubus_notify_log(struct log_head *l)
150 if (list_empty(&clients))
153 list_for_each_entry(c, &clients, list) {
154 blob_buf_init(&b, 0);
155 blobmsg_add_string(&b, "msg", l->data);
156 blobmsg_add_u32(&b, "id", l->id);
157 blobmsg_add_u32(&b, "priority", l->priority);
158 blobmsg_add_u32(&b, "source", l->source);
159 blobmsg_add_u64(&b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
160 ustream_write(&c->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
165 ubus_connect_handler(struct ubus_context *ctx)
169 ret = ubus_add_object(ctx, &log_object);
171 fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
174 fprintf(stderr, "log: connected to ubus\n");
178 main(int argc, char **argv)
180 int ch, log_size = 16;
182 signal(SIGPIPE, SIG_IGN);
183 while ((ch = getopt(argc, argv, "S:")) != -1) {
186 log_size = atoi(optarg);
196 conn.cb = ubus_connect_handler;
197 ubus_auto_connect(&conn);