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>
23 #include <sys/types.h>
24 #include <sys/socket.h>
29 #include <libubox/ustream.h>
30 #include <libubox/blobmsg_json.h>
31 #include <libubox/usock.h>
32 #include <libubox/uloop.h>
51 static const struct blobmsg_policy log_policy
[] = {
52 [LOG_MSG
] = { .name
= "msg", .type
= BLOBMSG_TYPE_STRING
},
53 [LOG_ID
] = { .name
= "id", .type
= BLOBMSG_TYPE_INT32
},
54 [LOG_PRIO
] = { .name
= "priority", .type
= BLOBMSG_TYPE_INT32
},
55 [LOG_SOURCE
] = { .name
= "source", .type
= BLOBMSG_TYPE_INT32
},
56 [LOG_TIME
] = { .name
= "time", .type
= BLOBMSG_TYPE_INT64
},
59 static struct uloop_timeout retry
;
60 static struct uloop_fd sender
;
61 static regex_t regexp_preg
;
62 static const char *log_file
, *log_ip
, *log_port
, *log_prefix
, *pid_file
, *hostname
, *regexp_pattern
;
63 static int log_type
= LOG_STDOUT
;
64 static int log_size
, log_udp
, log_follow
, log_trailer_null
= 0;
66 static const char* getcodetext(int value
, CODE
*codetable
) {
70 for (i
= codetable
; i
->c_val
!= -1; i
++)
71 if (i
->c_val
== value
)
76 static void log_handle_reconnect(struct uloop_timeout
*timeout
)
78 sender
.fd
= usock((log_udp
) ? (USOCK_UDP
) : (USOCK_TCP
), log_ip
, log_port
);
80 fprintf(stderr
, "failed to connect: %s\n", strerror(errno
));
81 uloop_timeout_set(&retry
, 1000);
83 uloop_fd_add(&sender
, ULOOP_READ
);
84 syslog(LOG_INFO
, "Logread connected to %s:%s\n", log_ip
, log_port
);
88 static void log_handle_fd(struct uloop_fd
*u
, unsigned int events
)
94 uloop_timeout_set(&retry
, 1000);
98 static int log_notify(struct blob_attr
*msg
)
100 struct blob_attr
*tb
[__LOG_MAX
];
112 blobmsg_parse(log_policy
, ARRAY_SIZE(log_policy
), tb
, blob_data(msg
), blob_len(msg
));
113 if (!tb
[LOG_ID
] || !tb
[LOG_PRIO
] || !tb
[LOG_SOURCE
] || !tb
[LOG_TIME
] || !tb
[LOG_MSG
])
116 if ((log_type
== LOG_FILE
) && log_size
&& (!stat(log_file
, &s
)) && (s
.st_size
> log_size
)) {
117 char *old
= malloc(strlen(log_file
) + 5);
121 sprintf(old
, "%s.old", log_file
);
122 rename(log_file
, old
);
125 sender
.fd
= open(log_file
, O_CREAT
| O_WRONLY
| O_APPEND
, 0600);
127 fprintf(stderr
, "failed to open %s: %s\n", log_file
, strerror(errno
));
132 m
= blobmsg_get_string(tb
[LOG_MSG
]);
133 if (regexp_pattern
&&
134 regexec(®exp_preg
, m
, 0, NULL
, 0) == REG_NOMATCH
)
136 t
= blobmsg_get_u64(tb
[LOG_TIME
]) / 1000;
138 p
= blobmsg_get_u32(tb
[LOG_PRIO
]);
139 c
[strlen(c
) - 1] = '\0';
140 str
= blobmsg_format_json(msg
, true);
141 if (log_type
== LOG_NET
) {
144 snprintf(buf
, sizeof(buf
), "<%u>", p
);
145 strncat(buf
, c
+ 4, 16);
147 strncat(buf
, hostname
, sizeof(buf
) - strlen(buf
) - 1);
148 strncat(buf
, " ", sizeof(buf
) - strlen(buf
) - 1);
151 strncat(buf
, log_prefix
, sizeof(buf
) - strlen(buf
) - 1);
152 strncat(buf
, ": ", sizeof(buf
) - strlen(buf
) - 1);
154 if (blobmsg_get_u32(tb
[LOG_SOURCE
]) == SOURCE_KLOG
)
155 strncat(buf
, "kernel: ", sizeof(buf
) - strlen(buf
) - 1);
156 strncat(buf
, m
, sizeof(buf
) - strlen(buf
) - 1);
158 err
= write(sender
.fd
, buf
, strlen(buf
));
160 size_t buflen
= strlen(buf
);
161 if (!log_trailer_null
)
163 err
= send(sender
.fd
, buf
, buflen
+ 1, 0);
167 syslog(LOG_INFO
, "failed to send log data to %s:%s via %s\n",
168 log_ip
, log_port
, (log_udp
) ? ("udp") : ("tcp"));
169 uloop_fd_delete(&sender
);
172 uloop_timeout_set(&retry
, 1000);
175 snprintf(buf
, sizeof(buf
), "%s %s.%s%s %s\n",
176 c
, getcodetext(LOG_FAC(p
) << 3, facilitynames
), getcodetext(LOG_PRI(p
), prioritynames
),
177 (blobmsg_get_u32(tb
[LOG_SOURCE
])) ? ("") : (" kernel:"), m
);
178 ret
= write(sender
.fd
, buf
, strlen(buf
));
182 if (log_type
== LOG_FILE
)
188 static int usage(const char *prog
)
190 fprintf(stderr
, "Usage: %s [options]\n"
192 " -s <path> Path to ubus socket\n"
193 " -l <count> Got only the last 'count' messages\n"
194 " -e <pattern> Filter messages with a regexp\n"
195 " -r <server> <port> Stream message to a server\n"
196 " -F <file> Log file\n"
197 " -S <bytes> Log size\n"
198 " -p <file> PID file\n"
199 " -h <hostname> Add hostname to the message\n"
200 " -P <prefix> Prefix custom text to streamed messages\n"
201 " -f Follow log messages\n"
202 " -u Use UDP as the protocol\n"
203 " -0 Use \\0 instead of \\n as trailer when using TCP\n"
208 static void logread_fd_data_cb(struct ustream
*s
, int bytes
)
214 a
= (void*) ustream_get_read_buf(s
, &len
);
215 if (len
< sizeof(*a
))
218 cur_len
= blob_len(a
) + sizeof(*a
);
223 ustream_consume(s
, cur_len
);
229 static void logread_fd_cb(struct ubus_request
*req
, int fd
)
231 static struct ustream_fd test_fd
;
233 test_fd
.stream
.notify_read
= logread_fd_data_cb
;
234 ustream_fd_init(&test_fd
, fd
);
237 int main(int argc
, char **argv
)
239 static struct ubus_request req
;
240 struct ubus_context
*ctx
;
242 const char *ubus_socket
= NULL
;
243 int ch
, ret
, lines
= 0;
244 static struct blob_buf b
;
247 signal(SIGPIPE
, SIG_IGN
);
249 while ((ch
= getopt(argc
, argv
, "u0fcs:l:r:F:p:S:P:h:e:")) != -1) {
255 log_trailer_null
= 1;
258 ubus_socket
= optarg
;
262 log_port
= argv
[optind
++];
277 lines
= atoi(optarg
);
280 log_size
= atoi(optarg
);
289 if (!regcomp(®exp_preg
, optarg
, REG_NOSUB
)) {
290 regexp_pattern
= optarg
;
299 ctx
= ubus_connect(ubus_socket
);
301 fprintf(stderr
, "Failed to connect to ubus\n");
306 /* ugly ugly ugly ... we need a real reconnect logic */
308 ret
= ubus_lookup_id(ctx
, "log", &id
);
310 fprintf(stderr
, "Failed to find log object: %s\n", ubus_strerror(ret
));
315 blob_buf_init(&b
, 0);
316 blobmsg_add_u8(&b
, "stream", 1);
318 blobmsg_add_u32(&b
, "lines", lines
);
320 blobmsg_add_u32(&b
, "lines", 0);
323 FILE *fp
= fopen(pid_file
, "w+");
325 fprintf(fp
, "%d", getpid());
331 if (log_ip
&& log_port
) {
332 openlog("logread", LOG_PID
, LOG_DAEMON
);
334 sender
.cb
= log_handle_fd
;
335 retry
.cb
= log_handle_reconnect
;
336 uloop_timeout_set(&retry
, 1000);
337 } else if (log_file
) {
339 sender
.fd
= open(log_file
, O_CREAT
| O_WRONLY
| O_APPEND
, 0600);
341 fprintf(stderr
, "failed to open %s: %s\n", log_file
, strerror(errno
));
345 sender
.fd
= STDOUT_FILENO
;
348 ubus_invoke_async(ctx
, id
, "read", b
.head
, &req
);
349 req
.fd_cb
= logread_fd_cb
;
350 ubus_complete_request_async(ctx
, &req
);
356 } while (ret
&& tries
--);