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, log_trailer_null = 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(LOG_INFO, "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];
110 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blob_data(msg), blob_len(msg));
111 if (!tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME] || !tb[LOG_MSG])
114 if ((log_type == LOG_FILE) && log_size && (!stat(log_file, &s)) && (s.st_size > log_size)) {
115 char *old = malloc(strlen(log_file) + 5);
119 sprintf(old, "%s.old", log_file);
120 rename(log_file, old);
123 sender.fd = open(log_file, O_CREAT | O_WRONLY | O_APPEND, 0600);
125 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
130 m = blobmsg_get_string(tb[LOG_MSG]);
131 t = blobmsg_get_u64(tb[LOG_TIME]) / 1000;
133 p = blobmsg_get_u32(tb[LOG_PRIO]);
134 c[strlen(c) - 1] = '\0';
135 str = blobmsg_format_json(msg, true);
136 if (log_type == LOG_NET) {
139 snprintf(buf, sizeof(buf), "<%u>", p);
140 strncat(buf, c + 4, 16);
142 strncat(buf, hostname, sizeof(buf) - strlen(buf) - 1);
143 strncat(buf, " ", sizeof(buf) - strlen(buf) - 1);
146 strncat(buf, log_prefix, sizeof(buf) - strlen(buf) - 1);
147 strncat(buf, ": ", sizeof(buf) - strlen(buf) - 1);
149 if (blobmsg_get_u32(tb[LOG_SOURCE]) == SOURCE_KLOG)
150 strncat(buf, "kernel: ", sizeof(buf) - strlen(buf) - 1);
151 strncat(buf, m, sizeof(buf) - strlen(buf) - 1);
153 err = write(sender.fd, buf, strlen(buf));
155 size_t buflen = strlen(buf);
156 if (!log_trailer_null)
158 err = send(sender.fd, buf, buflen + 1, 0);
162 syslog(LOG_INFO, "failed to send log data to %s:%s via %s\n",
163 log_ip, log_port, (log_udp) ? ("udp") : ("tcp"));
164 uloop_fd_delete(&sender);
167 uloop_timeout_set(&retry, 1000);
170 snprintf(buf, sizeof(buf), "%s %s.%s%s %s\n",
171 c, getcodetext(LOG_FAC(p) << 3, facilitynames), getcodetext(LOG_PRI(p), prioritynames),
172 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"), m);
173 ret = write(sender.fd, buf, strlen(buf));
177 if (log_type == LOG_FILE)
183 static int usage(const char *prog)
185 fprintf(stderr, "Usage: %s [options]\n"
187 " -s <path> Path to ubus socket\n"
188 " -l <count> Got only the last 'count' messages\n"
189 " -r <server> <port> Stream message to a server\n"
190 " -F <file> Log file\n"
191 " -S <bytes> Log size\n"
192 " -p <file> PID file\n"
193 " -h <hostname> Add hostname to the message\n"
194 " -P <prefix> Prefix custom text to streamed messages\n"
195 " -f Follow log messages\n"
196 " -u Use UDP as the protocol\n"
197 " -0 Use \\0 instead of \\n as trailer when using TCP\n"
202 static void logread_fd_data_cb(struct ustream *s, int bytes)
208 a = (void*) ustream_get_read_buf(s, &len);
209 if (len < sizeof(*a) || len < blob_len(a) + sizeof(*a))
212 ustream_consume(s, blob_len(a) + sizeof(*a));
218 static void logread_fd_cb(struct ubus_request *req, int fd)
220 static struct ustream_fd test_fd;
222 test_fd.stream.notify_read = logread_fd_data_cb;
223 ustream_fd_init(&test_fd, fd);
226 static void logread_complete_cb(struct ubus_request *req, int ret)
230 int main(int argc, char **argv)
232 static struct ubus_request req;
233 struct ubus_context *ctx;
235 const char *ubus_socket = NULL;
236 int ch, ret, lines = 0;
237 static struct blob_buf b;
240 signal(SIGPIPE, SIG_IGN);
242 while ((ch = getopt(argc, argv, "u0fcs:l:r:F:p:S:P:h:")) != -1) {
248 log_trailer_null = 1;
251 ubus_socket = optarg;
255 log_port = argv[optind++];
270 lines = atoi(optarg);
273 log_size = atoi(optarg);
287 ctx = ubus_connect(ubus_socket);
289 fprintf(stderr, "Failed to connect to ubus\n");
294 /* ugly ugly ugly ... we need a real reconnect logic */
296 ret = ubus_lookup_id(ctx, "log", &id);
298 fprintf(stderr, "Failed to find log object: %s\n", ubus_strerror(ret));
303 blob_buf_init(&b, 0);
305 blobmsg_add_u32(&b, "lines", lines);
307 blobmsg_add_u32(&b, "lines", 0);
310 FILE *fp = fopen(pid_file, "w+");
312 fprintf(fp, "%d", getpid());
318 if (log_ip && log_port) {
319 openlog("logread", LOG_PID, LOG_DAEMON);
321 sender.cb = log_handle_fd;
322 retry.cb = log_handle_reconnect;
323 uloop_timeout_set(&retry, 1000);
324 } else if (log_file) {
326 sender.fd = open(log_file, O_CREAT | O_WRONLY| O_APPEND, 0600);
328 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
332 sender.fd = STDOUT_FILENO;
335 ubus_invoke_async(ctx, id, "read", b.head, &req);
336 req.fd_cb = logread_fd_cb;
337 req.complete_cb = logread_complete_cb;
338 ubus_complete_request_async(ctx, &req);
344 } while (ret && tries--);