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;
65 static int log_timestamp;
67 static const char* getcodetext(int value, CODE *codetable) {
71 for (i = codetable; i->c_val != -1; i++)
72 if (i->c_val == value)
77 static void log_handle_reconnect(struct uloop_timeout *timeout)
79 sender.fd = usock((log_udp) ? (USOCK_UDP) : (USOCK_TCP), log_ip, log_port);
81 fprintf(stderr, "failed to connect: %s\n", strerror(errno));
82 uloop_timeout_set(&retry, 1000);
84 uloop_fd_add(&sender, ULOOP_READ);
85 syslog(LOG_INFO, "Logread connected to %s:%s\n", log_ip, log_port);
89 static void log_handle_fd(struct uloop_fd *u, unsigned int events)
95 uloop_timeout_set(&retry, 1000);
99 static int log_notify(struct blob_attr *msg)
101 struct blob_attr *tb[__LOG_MAX];
115 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blob_data(msg), blob_len(msg));
116 if (!tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME] || !tb[LOG_MSG])
119 if ((log_type == LOG_FILE) && log_size && (!stat(log_file, &s)) && (s.st_size > log_size)) {
120 char *old = malloc(strlen(log_file) + 5);
124 sprintf(old, "%s.old", log_file);
125 rename(log_file, old);
128 sender.fd = open(log_file, O_CREAT | O_WRONLY | O_APPEND, 0600);
130 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
135 m = blobmsg_get_string(tb[LOG_MSG]);
136 if (regexp_pattern &&
137 regexec(®exp_preg, m, 0, NULL, 0) == REG_NOMATCH)
139 t = blobmsg_get_u64(tb[LOG_TIME]) / 1000;
141 t_ms = blobmsg_get_u64(tb[LOG_TIME]) % 1000;
142 snprintf(buf_ts, sizeof(buf_ts), "[%lu.%03u] ",
143 (unsigned long)t, t_ms);
146 p = blobmsg_get_u32(tb[LOG_PRIO]);
147 c[strlen(c) - 1] = '\0';
148 str = blobmsg_format_json(msg, true);
149 if (log_type == LOG_NET) {
152 snprintf(buf, sizeof(buf), "<%u>", p);
153 strncat(buf, c + 4, 16);
155 strncat(buf, buf_ts, sizeof(buf) - strlen(buf) - 1);
158 strncat(buf, hostname, sizeof(buf) - strlen(buf) - 1);
159 strncat(buf, " ", sizeof(buf) - strlen(buf) - 1);
162 strncat(buf, log_prefix, sizeof(buf) - strlen(buf) - 1);
163 strncat(buf, ": ", sizeof(buf) - strlen(buf) - 1);
165 if (blobmsg_get_u32(tb[LOG_SOURCE]) == SOURCE_KLOG)
166 strncat(buf, "kernel: ", sizeof(buf) - strlen(buf) - 1);
167 strncat(buf, m, sizeof(buf) - strlen(buf) - 1);
169 err = write(sender.fd, buf, strlen(buf));
171 size_t buflen = strlen(buf);
172 if (!log_trailer_null)
174 err = send(sender.fd, buf, buflen + 1, 0);
178 syslog(LOG_INFO, "failed to send log data to %s:%s via %s\n",
179 log_ip, log_port, (log_udp) ? ("udp") : ("tcp"));
180 uloop_fd_delete(&sender);
183 uloop_timeout_set(&retry, 1000);
186 snprintf(buf, sizeof(buf), "%s %s%s.%s%s %s\n",
187 c, log_timestamp ? buf_ts : "",
188 getcodetext(LOG_FAC(p) << 3, facilitynames),
189 getcodetext(LOG_PRI(p), prioritynames),
190 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"), m);
191 ret = write(sender.fd, buf, strlen(buf));
195 if (log_type == LOG_FILE)
201 static int usage(const char *prog)
203 fprintf(stderr, "Usage: %s [options]\n"
205 " -s <path> Path to ubus socket\n"
206 " -l <count> Got only the last 'count' messages\n"
207 " -e <pattern> Filter messages with a regexp\n"
208 " -r <server> <port> Stream message to a server\n"
209 " -F <file> Log file\n"
210 " -S <bytes> Log size\n"
211 " -p <file> PID file\n"
212 " -h <hostname> Add hostname to the message\n"
213 " -P <prefix> Prefix custom text to streamed messages\n"
214 " -f Follow log messages\n"
215 " -u Use UDP as the protocol\n"
216 " -t Add an extra timestamp\n"
217 " -0 Use \\0 instead of \\n as trailer when using TCP\n"
222 static void logread_fd_data_cb(struct ustream *s, int bytes)
228 a = (void*) ustream_get_read_buf(s, &len);
229 if (len < sizeof(*a))
232 cur_len = blob_len(a) + sizeof(*a);
237 ustream_consume(s, cur_len);
243 static void logread_fd_cb(struct ubus_request *req, int fd)
245 static struct ustream_fd test_fd;
247 test_fd.stream.notify_read = logread_fd_data_cb;
248 ustream_fd_init(&test_fd, fd);
251 int main(int argc, char **argv)
253 static struct ubus_request req;
254 struct ubus_context *ctx;
256 const char *ubus_socket = NULL;
257 int ch, ret, lines = 0;
258 static struct blob_buf b;
261 signal(SIGPIPE, SIG_IGN);
263 while ((ch = getopt(argc, argv, "u0fcs:l:r:F:p:S:P:h:e:t")) != -1) {
269 log_trailer_null = 1;
272 ubus_socket = optarg;
276 log_port = argv[optind++];
291 lines = atoi(optarg);
294 log_size = atoi(optarg);
303 if (!regcomp(®exp_preg, optarg, REG_NOSUB)) {
304 regexp_pattern = optarg;
316 ctx = ubus_connect(ubus_socket);
318 fprintf(stderr, "Failed to connect to ubus\n");
323 /* ugly ugly ugly ... we need a real reconnect logic */
325 ret = ubus_lookup_id(ctx, "log", &id);
327 fprintf(stderr, "Failed to find log object: %s\n", ubus_strerror(ret));
332 blob_buf_init(&b, 0);
333 blobmsg_add_u8(&b, "stream", 1);
335 blobmsg_add_u32(&b, "lines", lines);
337 blobmsg_add_u32(&b, "lines", 0);
340 FILE *fp = fopen(pid_file, "w+");
342 fprintf(fp, "%d", getpid());
348 if (log_ip && log_port) {
349 openlog("logread", LOG_PID, LOG_DAEMON);
351 sender.cb = log_handle_fd;
352 retry.cb = log_handle_reconnect;
353 uloop_timeout_set(&retry, 1000);
354 } else if (log_file) {
356 sender.fd = open(log_file, O_CREAT | O_WRONLY| O_APPEND, 0600);
358 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
362 sender.fd = STDOUT_FILENO;
365 ubus_invoke_async(ctx, id, "read", b.head, &req);
366 req.fd_cb = logread_fd_cb;
367 ubus_complete_request_async(ctx, &req);
373 } while (ret && tries--);