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
);
41 static const struct blobmsg_policy read_policy
[__READ_MAX
] = {
42 [READ_LINES
] = { .name
= "lines", .type
= BLOBMSG_TYPE_INT32
},
43 [READ_STREAM
] = { .name
= "stream", .type
= BLOBMSG_TYPE_BOOL
},
44 [READ_ONESHOT
] = { .name
= "oneshot", .type
= BLOBMSG_TYPE_BOOL
},
47 static const struct blobmsg_policy write_policy
=
48 { .name
= "event", .type
= BLOBMSG_TYPE_STRING
};
51 struct list_head list
;
58 client_close(struct ustream
*s
)
60 struct client
*cl
= container_of(s
, struct client
, s
.stream
);
68 static void client_notify_state(struct ustream
*s
)
73 static void client_notify_write(struct ustream
*s
, int bytes
)
75 if (ustream_pending_data(s
, true))
82 log_fill_msg(struct blob_buf
*b
, struct log_head
*l
)
84 blobmsg_add_string(b
, "msg", l
->data
);
85 blobmsg_add_u32(b
, "id", l
->id
);
86 blobmsg_add_u32(b
, "priority", l
->priority
);
87 blobmsg_add_u32(b
, "source", l
->source
);
88 blobmsg_add_u64(b
, "time", (((__u64
) l
->ts
.tv_sec
) * 1000) + (l
->ts
.tv_nsec
/ 1000000));
92 read_log(struct ubus_context
*ctx
, struct ubus_object
*obj
,
93 struct ubus_request_data
*req
, const char *method
,
94 struct blob_attr
*msg
)
97 struct blob_attr
*tb
[__READ_MAX
] = {};
103 bool oneshot
= false;
110 blobmsg_parse(read_policy
, __READ_MAX
, tb
, blob_data(msg
), blob_len(msg
));
112 count
= blobmsg_get_u32(tb
[READ_LINES
]);
114 stream
= blobmsg_get_bool(tb
[READ_STREAM
]);
115 if (tb
[READ_ONESHOT
])
116 oneshot
= blobmsg_get_bool(tb
[READ_ONESHOT
]);
119 l
= log_list(count
, NULL
);
121 if (pipe(fds
) == -1) {
122 fprintf(stderr
, "logd: failed to create pipe: %s\n", strerror(errno
));
126 ubus_request_set_fd(ctx
, req
, fds
[0]);
127 cl
= calloc(1, sizeof(*cl
));
128 cl
->s
.stream
.notify_state
= client_notify_state
;
130 ustream_fd_init(&cl
->s
, cl
->fd
);
131 list_add(&cl
->list
, &clients
);
132 while ((!tb
[READ_LINES
] || count
) && l
) {
133 blob_buf_init(&b
, 0);
135 l
= log_list(count
, l
);
136 ret
= ustream_write(&cl
->s
.stream
, (void *) b
.head
, blob_len(b
.head
) + sizeof(struct blob_attr
), false);
142 cl
->s
.stream
.notify_write
= client_notify_write
;
143 client_notify_write(&cl
->s
.stream
, 0);
146 blob_buf_init(&b
, 0);
147 c
= blobmsg_open_array(&b
, "log");
148 while ((!tb
[READ_LINES
] || count
) && l
) {
149 e
= blobmsg_open_table(&b
, NULL
);
151 blobmsg_close_table(&b
, e
);
152 l
= log_list(count
, l
);
154 blobmsg_close_array(&b
, c
);
155 ubus_send_reply(ctx
, req
, b
.head
);
162 write_log(struct ubus_context
*ctx
, struct ubus_object
*obj
,
163 struct ubus_request_data
*req
, const char *method
,
164 struct blob_attr
*msg
)
166 struct blob_attr
*tb
;
172 blobmsg_parse(&write_policy
, 1, &tb
, blob_data(msg
), blob_len(msg
));
174 event
= blobmsg_get_string(tb
);
175 len
= strlen(event
) + 1;
176 if (len
> LOG_LINE_SIZE
) {
181 log_add(event
, len
, SOURCE_SYSLOG
);
188 static const struct ubus_method log_methods
[] = {
189 UBUS_METHOD("read", read_log
, read_policy
),
190 { .name
= "write", .handler
= write_log
, .policy
= &write_policy
, .n_policy
= 1 },
193 static struct ubus_object_type log_object_type
=
194 UBUS_OBJECT_TYPE("log", log_methods
);
196 static struct ubus_object log_object
= {
198 .type
= &log_object_type
,
199 .methods
= log_methods
,
200 .n_methods
= ARRAY_SIZE(log_methods
),
204 ubus_notify_log(struct log_head
*l
)
208 if (list_empty(&clients
))
211 blob_buf_init(&b
, 0);
212 blobmsg_add_string(&b
, "msg", l
->data
);
213 blobmsg_add_u32(&b
, "id", l
->id
);
214 blobmsg_add_u32(&b
, "priority", l
->priority
);
215 blobmsg_add_u32(&b
, "source", l
->source
);
216 blobmsg_add_u64(&b
, "time", (((__u64
) l
->ts
.tv_sec
) * 1000) + (l
->ts
.tv_nsec
/ 1000000));
218 list_for_each_entry(c
, &clients
, list
)
219 ustream_write(&c
->s
.stream
, (void *) b
.head
, blob_len(b
.head
) + sizeof(struct blob_attr
), false);
225 ubus_connect_handler(struct ubus_context
*ctx
)
229 ret
= ubus_add_object(ctx
, &log_object
);
231 fprintf(stderr
, "Failed to add object: %s\n", ubus_strerror(ret
));
234 fprintf(stderr
, "log: connected to ubus\n");
238 main(int argc
, char **argv
)
240 int ch
, log_size
= 16;
242 signal(SIGPIPE
, SIG_IGN
);
243 while ((ch
= getopt(argc
, argv
, "S:")) != -1) {
246 log_size
= atoi(optarg
);
256 conn
.cb
= ubus_connect_handler
;
257 ubus_auto_connect(&conn
);
261 ubus_auto_shutdown(&conn
);