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
);