2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include <sys/types.h>
22 #include <sys/types.h>
23 #include <sys/socket.h>
28 #include <libubox/blobmsg_json.h>
29 #include <libubox/usock.h>
30 #include <libubox/uloop.h>
49 static const struct blobmsg_policy log_policy
[] = {
50 [LOG_MSG
] = { .name
= "msg", .type
= BLOBMSG_TYPE_STRING
},
51 [LOG_ID
] = { .name
= "id", .type
= BLOBMSG_TYPE_INT32
},
52 [LOG_PRIO
] = { .name
= "priority", .type
= BLOBMSG_TYPE_INT32
},
53 [LOG_SOURCE
] = { .name
= "source", .type
= BLOBMSG_TYPE_INT32
},
54 [LOG_TIME
] = { .name
= "time", .type
= BLOBMSG_TYPE_INT64
},
57 static struct ubus_subscriber log_event
;
58 static struct uloop_timeout retry
;
59 static struct uloop_fd sender
;
60 static const char *log_file
, *log_ip
, *log_port
, *log_prefix
, *pid_file
, *hostname
;
61 static int log_type
= LOG_STDOUT
;
62 static int log_size
, log_udp
;
64 static const char* getcodetext(int value
, CODE
*codetable
) {
68 for (i
= codetable
; i
->c_val
!= -1; i
++)
69 if (i
->c_val
== value
)
74 static void log_handle_reconnect(struct uloop_timeout
*timeout
)
76 sender
.fd
= usock((log_udp
) ? (USOCK_UDP
) : (USOCK_TCP
), log_ip
, log_port
);
78 fprintf(stderr
, "failed to connect: %s\n", strerror(errno
));
79 uloop_timeout_set(&retry
, 1000);
81 uloop_fd_add(&sender
, ULOOP_READ
);
82 syslog(0, "Logread connected to %s:%s\n", log_ip
, log_port
);
86 static void log_handle_remove(struct ubus_context
*ctx
, struct ubus_subscriber
*s
,
89 fprintf(stderr
, "Object %08x went away\n", id
);
92 static void log_handle_fd(struct uloop_fd
*u
, unsigned int events
)
98 uloop_timeout_set(&retry
, 1000);
102 static int log_notify(struct ubus_context
*ctx
, struct ubus_object
*obj
,
103 struct ubus_request_data
*req
, const char *method
,
104 struct blob_attr
*msg
)
106 struct blob_attr
*tb
[__LOG_MAX
];
117 blobmsg_parse(log_policy
, ARRAY_SIZE(log_policy
), tb
, blob_data(msg
), blob_len(msg
));
118 if (!tb
[LOG_ID
] || !tb
[LOG_PRIO
] || !tb
[LOG_SOURCE
] || !tb
[LOG_TIME
])
121 if ((log_type
== LOG_FILE
) && log_size
&& (!stat(log_file
, &s
)) && (s
.st_size
> log_size
)) {
122 char *old
= malloc(strlen(log_file
) + 5);
126 sprintf(old
, "%s.old", log_file
);
127 rename(log_file
, old
);
130 sender
.fd
= open(log_file
, O_CREAT
| O_WRONLY
| O_APPEND
, 0600);
132 // fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
137 t
= blobmsg_get_u64(tb
[LOG_TIME
]) / 1000;
139 p
= blobmsg_get_u32(tb
[LOG_PRIO
]);
140 c
[strlen(c
) - 1] = '\0';
141 str
= blobmsg_format_json(msg
, true);
142 if (log_type
== LOG_NET
) {
147 snprintf(buf
, sizeof(buf
), "%s ", hostname
);
149 strncat(buf
, log_prefix
, sizeof(buf
));
150 strncat(buf
, ": ", sizeof(buf
));
152 if (blobmsg_get_u32(tb
[LOG_SOURCE
]) == SOURCE_KLOG
)
153 strncat(buf
, "kernel: ", sizeof(buf
));
154 strncat(buf
, method
, sizeof(buf
));
156 err
= write(sender
.fd
, buf
, strlen(buf
));
158 err
= send(sender
.fd
, buf
, strlen(buf
), 0);
161 syslog(0, "failed to send log data to %s:%s via %s\n",
162 log_ip
, log_port
, (log_udp
) ? ("udp") : ("tcp"));
163 uloop_fd_delete(&sender
);
166 uloop_timeout_set(&retry
, 1000);
169 snprintf(buf
, sizeof(buf
), "%s %s.%s%s %s\n",
170 c
, getcodetext(LOG_FAC(p
) << 3, facilitynames
), getcodetext(LOG_PRI(p
), prioritynames
),
171 (blobmsg_get_u32(tb
[LOG_SOURCE
])) ? ("") : (" kernel:"),
173 write(sender
.fd
, buf
, strlen(buf
));
177 if (log_type
== LOG_FILE
)
183 static void follow_log(struct ubus_context
*ctx
, int id
)
188 signal(SIGPIPE
, SIG_IGN
);
191 fp
= fopen(pid_file
, "w+");
193 fprintf(fp
, "%d", getpid());
201 log_event
.remove_cb
= log_handle_remove
;
202 log_event
.cb
= log_notify
;
203 ret
= ubus_register_subscriber(ctx
, &log_event
);
205 fprintf(stderr
, "Failed to add watch handler: %s\n", ubus_strerror(ret
));
207 ret
= ubus_subscribe(ctx
, &log_event
, id
);
209 fprintf(stderr
, "Failed to add watch handler: %s\n", ubus_strerror(ret
));
211 if (log_ip
&& log_port
) {
212 openlog("logread", LOG_PID
, LOG_DAEMON
);
214 sender
.cb
= log_handle_fd
;
215 retry
.cb
= log_handle_reconnect
;
216 uloop_timeout_set(&retry
, 1000);
217 } else if (log_file
) {
219 sender
.fd
= open(log_file
, O_CREAT
| O_WRONLY
| O_APPEND
, 0600);
221 fprintf(stderr
, "failed to open %s: %s\n", log_file
, strerror(errno
));
225 sender
.fd
= STDOUT_FILENO
;
240 static const struct blobmsg_policy read_policy
[] = {
241 [READ_LINE
] = { .name
= "lines", .type
= BLOBMSG_TYPE_ARRAY
},
244 static void read_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
246 struct blob_attr
*cur
;
247 struct blob_attr
*_tb
[__READ_MAX
];
254 blobmsg_parse(read_policy
, ARRAY_SIZE(read_policy
), _tb
, blob_data(msg
), blob_len(msg
));
257 blobmsg_for_each_attr(cur
, _tb
[READ_LINE
], rem
) {
258 struct blob_attr
*tb
[__LOG_MAX
];
262 if (blobmsg_type(cur
) != BLOBMSG_TYPE_TABLE
)
265 blobmsg_parse(log_policy
, ARRAY_SIZE(log_policy
), tb
, blobmsg_data(cur
), blobmsg_data_len(cur
));
266 if (!tb
[LOG_MSG
] || !tb
[LOG_ID
] || !tb
[LOG_PRIO
] || !tb
[LOG_SOURCE
] || !tb
[LOG_TIME
])
269 t
= blobmsg_get_u64(tb
[LOG_TIME
]);
270 p
= blobmsg_get_u32(tb
[LOG_PRIO
]);
272 c
[strlen(c
) - 1] = '\0';
274 printf("%s %s.%s%s %s\n",
275 c
, getcodetext(LOG_FAC(p
) << 3, facilitynames
), getcodetext(LOG_PRI(p
), prioritynames
),
276 (blobmsg_get_u32(tb
[LOG_SOURCE
])) ? ("") : (" kernel:"),
277 blobmsg_get_string(tb
[LOG_MSG
]));
281 static int usage(const char *prog
)
283 fprintf(stderr
, "Usage: %s [options]\n"
285 " -s <path> Path to ubus socket\n"
286 " -l <count> Got only the last 'count' messages\n"
287 " -r <server> <port> Stream message to a server\n"
288 " -F <file> Log file\n"
289 " -S <bytes> Log size\n"
290 " -p <file> PID file\n"
291 " -h <hostname> Add hostname to the message\n"
292 " -P <prefix> Prefix custom text to streamed messages\n"
293 " -f Follow log messages\n"
294 " -u Use UDP as the protocol\n"
299 int main(int argc
, char **argv
)
301 struct ubus_context
*ctx
;
303 const char *ubus_socket
= NULL
;
304 int ch
, ret
, subscribe
= 0, lines
= 0;
305 static struct blob_buf b
;
307 while ((ch
= getopt(argc
, argv
, "ufcs:l:r:F:p:S:P:h:")) != -1) {
313 ubus_socket
= optarg
;
317 log_port
= argv
[optind
++];
332 lines
= atoi(optarg
);
335 log_size
= atoi(optarg
);
348 ctx
= ubus_connect(ubus_socket
);
350 fprintf(stderr
, "Failed to connect to ubus\n");
354 ret
= ubus_lookup_id(ctx
, "log", &id
);
356 fprintf(stderr
, "Failed to find log object: %s\n", ubus_strerror(ret
));
358 if (!subscribe
|| lines
) {
359 blob_buf_init(&b
, 0);
361 blobmsg_add_u32(&b
, "lines", lines
);
362 ubus_invoke(ctx
, id
, "read", b
.head
, read_cb
, 0, 3000);