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--);