1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdio.h>
#include <unistd.h>
#include <syslog.h>
#include <unistd.h>
#include <linux/types.h>
#include <libubox/uloop.h>
#include <libubox/blobmsg.h>
#include <libubox/list.h>
#include <libubox/ustream.h>
#include <libubus.h>
#include "syslog.h"
int debug = 0;
static struct blob_buf b;
static struct ubus_auto_conn conn;
static LIST_HEAD(clients);
static const struct blobmsg_policy read_policy =
{ .name = "lines", .type = BLOBMSG_TYPE_INT32 };
static const struct blobmsg_policy write_policy =
{ .name = "event", .type = BLOBMSG_TYPE_STRING };
struct client {
struct list_head list;
struct ustream_fd s;
int fd;
};
static void
client_close(struct ustream *s)
{
struct client *cl = container_of(s, struct client, s.stream);
list_del(&cl->list);
ustream_free(s);
close(cl->fd);
free(cl);
}
static void
client_notify_write(struct ustream *s, int bytes)
{
}
static void client_notify_state(struct ustream *s)
{
client_close(s);
}
static int
read_log(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct client *cl;
struct blob_attr *tb;
struct log_head *l;
int count = 0;
int fds[2];
if (msg) {
blobmsg_parse(&read_policy, 1, &tb, blob_data(msg), blob_len(msg));
if (tb)
count = blobmsg_get_u32(tb);
}
pipe(fds);
ubus_request_set_fd(ctx, req, fds[0]);
cl = calloc(1, sizeof(*cl));
cl->s.stream.notify_write = client_notify_write;
cl->s.stream.notify_state = client_notify_state;
cl->fd = fds[1];
ustream_fd_init(&cl->s, cl->fd);
list_add(&cl->list, &clients);
l = log_list(count, NULL);
while ((!tb || count) && l) {
blob_buf_init(&b, 0);
blobmsg_add_string(&b, "msg", l->data);
blobmsg_add_u32(&b, "id", l->id);
blobmsg_add_u32(&b, "priority", l->priority);
blobmsg_add_u32(&b, "source", l->source);
blobmsg_add_u64(&b, "time", l->ts.tv_sec * 1000LL);
l = log_list(count, l);
if (ustream_write(&cl->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false) <= 0)
break;
}
return 0;
}
static int
write_log(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct blob_attr *tb;
char *event;
if (msg) {
blobmsg_parse(&write_policy, 1, &tb, blob_data(msg), blob_len(msg));
if (tb) {
event = blobmsg_get_string(tb);
log_add(event, strlen(event) + 1, SOURCE_SYSLOG);
}
}
return 0;
}
static const struct ubus_method log_methods[] = {
{ .name = "read", .handler = read_log, .policy = &read_policy, .n_policy = 1 },
{ .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
};
static struct ubus_object_type log_object_type =
UBUS_OBJECT_TYPE("log", log_methods);
static struct ubus_object log_object = {
.name = "log",
.type = &log_object_type,
.methods = log_methods,
.n_methods = ARRAY_SIZE(log_methods),
};
void
ubus_notify_log(struct log_head *l)
{
struct client *c;
if (list_empty(&clients))
return;
list_for_each_entry(c, &clients, list) {
blob_buf_init(&b, 0);
blobmsg_add_string(&b, "msg", l->data);
blobmsg_add_u32(&b, "id", l->id);
blobmsg_add_u32(&b, "priority", l->priority);
blobmsg_add_u32(&b, "source", l->source);
blobmsg_add_u64(&b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
ustream_write(&c->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
}
}
static void
ubus_connect_handler(struct ubus_context *ctx)
{
int ret;
ret = ubus_add_object(ctx, &log_object);
if (ret)
fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
fprintf(stderr, "log: connected to ubus\n");
}
int
main(int argc, char **argv)
{
int ch, log_size = 16;
signal(SIGPIPE, SIG_IGN);
while ((ch = getopt(argc, argv, "S:")) != -1) {
switch (ch) {
case 'S':
log_size = atoi(optarg);
if (log_size < 1)
log_size = 16;
break;
}
}
log_size *= 1024;
uloop_init();
log_init(log_size);
conn.cb = ubus_connect_handler;
ubus_auto_connect(&conn);
uloop_run();
log_shutdown();
uloop_done();
return 0;
}
|
