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/ustream.h>
29 #include <libubox/blobmsg_json.h>
30 #include <libubox/usock.h>
31 #include <libubox/uloop.h>
50 static const struct blobmsg_policy log_policy[] = {
51 [LOG_MSG] = { .name = "msg", .type = BLOBMSG_TYPE_STRING },
52 [LOG_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
53 [LOG_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
54 [LOG_SOURCE] = { .name = "source", .type = BLOBMSG_TYPE_INT32 },
55 [LOG_TIME] = { .name = "time", .type = BLOBMSG_TYPE_INT64 },
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, log_follow = 0;
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_fd(struct uloop_fd *u, unsigned int events)
92 uloop_timeout_set(&retry, 1000);
96 static int log_notify(struct blob_attr *msg)
98 struct blob_attr *tb[__LOG_MAX];
109 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blob_data(msg), blob_len(msg));
110 if (!tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME] || !tb[LOG_MSG])
113 if ((log_type == LOG_FILE) && log_size && (!stat(log_file, &s)) && (s.st_size > log_size)) {
114 char *old = malloc(strlen(log_file) + 5);
118 sprintf(old, "%s.old", log_file);
119 rename(log_file, old);
122 sender.fd = open(log_file, O_CREAT | O_WRONLY | O_APPEND, 0600);
124 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
129 m = blobmsg_get_string(tb[LOG_MSG]);
130 t = blobmsg_get_u64(tb[LOG_TIME]) / 1000;
132 p = blobmsg_get_u32(tb[LOG_PRIO]);
133 c[strlen(c) - 1] = '\0';
134 str = blobmsg_format_json(msg, true);
135 if (log_type == LOG_NET) {
140 snprintf(buf, sizeof(buf), "%s ", hostname);
142 strncat(buf, log_prefix, sizeof(buf));
143 strncat(buf, ": ", sizeof(buf));
145 if (blobmsg_get_u32(tb[LOG_SOURCE]) == SOURCE_KLOG)
146 strncat(buf, "kernel: ", sizeof(buf));
147 strncat(buf, m, sizeof(buf));
149 err = write(sender.fd, buf, strlen(buf));
151 err = send(sender.fd, buf, strlen(buf), 0);
154 syslog(0, "failed to send log data to %s:%s via %s\n",
155 log_ip, log_port, (log_udp) ? ("udp") : ("tcp"));
156 uloop_fd_delete(&sender);
159 uloop_timeout_set(&retry, 1000);
162 snprintf(buf, sizeof(buf), "%s %s.%s%s %s\n",
163 c, getcodetext(LOG_FAC(p) << 3, facilitynames), getcodetext(LOG_PRI(p), prioritynames),
164 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"), m);
165 write(sender.fd, buf, strlen(buf));
169 if (log_type == LOG_FILE)
175 static int usage(const char *prog)
177 fprintf(stderr, "Usage: %s [options]\n"
179 " -s <path> Path to ubus socket\n"
180 " -l <count> Got only the last 'count' messages\n"
181 " -r <server> <port> Stream message to a server\n"
182 " -F <file> Log file\n"
183 " -S <bytes> Log size\n"
184 " -p <file> PID file\n"
185 " -h <hostname> Add hostname to the message\n"
186 " -P <prefix> Prefix custom text to streamed messages\n"
187 " -f Follow log messages\n"
188 " -u Use UDP as the protocol\n"
193 static void logread_fd_data_cb(struct ustream *s, int bytes)
199 a = (void*) ustream_get_read_buf(s, &len);
200 if (len < sizeof(*a) || len < blob_len(a) + sizeof(*a))
203 ustream_consume(s, blob_len(a) + sizeof(*a));
209 static void logread_fd_cb(struct ubus_request *req, int fd)
211 static struct ustream_fd test_fd;
213 test_fd.stream.notify_read = logread_fd_data_cb;
214 ustream_fd_init(&test_fd, fd);
217 static void logread_complete_cb(struct ubus_request *req, int ret)
221 int main(int argc, char **argv)
223 static struct ubus_request req;
224 struct ubus_context *ctx;
226 const char *ubus_socket = NULL;
227 int ch, ret, lines = 0;
228 static struct blob_buf b;
231 signal(SIGPIPE, SIG_IGN);
233 while ((ch = getopt(argc, argv, "ufcs:l:r:F:p:S:P:h:")) != -1) {
239 ubus_socket = optarg;
243 log_port = argv[optind++];
258 lines = atoi(optarg);
261 log_size = atoi(optarg);
275 ctx = ubus_connect(ubus_socket);
277 fprintf(stderr, "Failed to connect to ubus\n");
282 /* ugly ugly ugly ... we need a real reconnect logic */
284 ret = ubus_lookup_id(ctx, "log", &id);
286 fprintf(stderr, "Failed to find log object: %s\n", ubus_strerror(ret));
291 blob_buf_init(&b, 0);
293 blobmsg_add_u32(&b, "lines", lines);
295 blobmsg_add_u32(&b, "lines", 0);
298 FILE *fp = fopen(pid_file, "w+");
300 fprintf(fp, "%d", getpid());
306 if (log_ip && log_port) {
307 openlog("logread", LOG_PID, LOG_DAEMON);
309 sender.cb = log_handle_fd;
310 retry.cb = log_handle_reconnect;
311 uloop_timeout_set(&retry, 1000);
312 } else if (log_file) {
314 sender.fd = open(log_file, O_CREAT | O_WRONLY| O_APPEND, 0600);
316 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
320 sender.fd = STDOUT_FILENO;
323 ubus_invoke_async(ctx, id, "read", b.head, &req);
324 req.fd_cb = logread_fd_cb;
325 req.complete_cb = logread_complete_cb;
326 ubus_complete_request_async(ctx, &req);
332 } while (ret && tries--);