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/blobmsg_json.h>
29 #include <libubox/usock.h>
30 #include <libubox/uloop.h>
48 static const struct blobmsg_policy log_policy[] = {
49 [LOG_MSG] = { .name = "msg", .type = BLOBMSG_TYPE_STRING },
50 [LOG_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
51 [LOG_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
52 [LOG_SOURCE] = { .name = "source", .type = BLOBMSG_TYPE_INT32 },
53 [LOG_TIME] = { .name = "time", .type = BLOBMSG_TYPE_INT64 },
56 static struct ubus_subscriber log_event;
57 static struct uloop_timeout retry;
58 static struct uloop_fd sender;
59 static const char *log_file, *log_ip, *log_port, *pid_file;
60 static int log_type = LOG_STDOUT;
61 static int log_size, log_udp;
63 static const char* getcodetext(int value, CODE *codetable) {
67 for (i = codetable; i->c_val != -1; i++)
68 if (i->c_val == value)
73 static void log_handle_reconnect(struct uloop_timeout *timeout)
75 sender.fd = usock((log_udp) ? (USOCK_UDP) : (USOCK_TCP), log_ip, log_port);
77 fprintf(stderr, "failed to connect: %s\n", strerror(errno));
78 uloop_timeout_set(&retry, 1000);
80 uloop_fd_add(&sender, ULOOP_READ);
81 syslog(0, "Logread connected to %s:%s\n", log_ip, log_port);
85 static void log_handle_remove(struct ubus_context *ctx, struct ubus_subscriber *s,
88 fprintf(stderr, "Object %08x went away\n", id);
91 static void log_handle_fd(struct uloop_fd *u, unsigned int events)
97 uloop_timeout_set(&retry, 1000);
101 static int log_notify(struct ubus_context *ctx, struct ubus_object *obj,
102 struct ubus_request_data *req, const char *method,
103 struct blob_attr *msg)
105 struct blob_attr *tb[__LOG_MAX];
116 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blob_data(msg), blob_len(msg));
117 if (!tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME])
120 if ((log_type == LOG_FILE) && log_size && (!stat(log_file, &s)) && (s.st_size > log_size)) {
121 char *old = malloc(strlen(log_file) + 5);
125 sprintf(old, "%s.old", log_file);
126 rename(log_file, old);
129 sender.fd = open(log_file, O_CREAT | O_WRONLY | O_APPEND, 0600);
131 // fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
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), "%s%s\n",
145 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : ("kernel: "),
148 err = write(sender.fd, buf, strlen(buf));
150 err = send(sender.fd, buf, strlen(buf), 0);
153 syslog(0, "failed to send log data to %s:%s via %s\n",
154 log_ip, log_port, (log_udp) ? ("udp") : ("tcp"));
155 uloop_fd_delete(&sender);
158 uloop_timeout_set(&retry, 1000);
161 snprintf(buf, sizeof(buf), "%s %s.%s%s %s\n",
162 c, getcodetext(LOG_FAC(p) << 3, facilitynames), getcodetext(LOG_PRI(p), prioritynames),
163 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"),
165 write(sender.fd, buf, strlen(buf));
169 if (log_type == LOG_FILE)
175 static void follow_log(struct ubus_context *ctx, int id)
180 signal(SIGPIPE, SIG_IGN);
183 fp = fopen(pid_file, "w+");
185 fprintf(fp, "%d", getpid());
193 log_event.remove_cb = log_handle_remove;
194 log_event.cb = log_notify;
195 ret = ubus_register_subscriber(ctx, &log_event);
197 fprintf(stderr, "Failed to add watch handler: %s\n", ubus_strerror(ret));
199 ret = ubus_subscribe(ctx, &log_event, id);
201 fprintf(stderr, "Failed to add watch handler: %s\n", ubus_strerror(ret));
203 if (log_ip && log_port) {
204 openlog("logread", LOG_PID, LOG_DAEMON);
206 sender.cb = log_handle_fd;
207 retry.cb = log_handle_reconnect;
208 uloop_timeout_set(&retry, 1000);
209 } else if (log_file) {
211 sender.fd = open(log_file, O_CREAT | O_WRONLY| O_APPEND, 0600);
213 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
217 sender.fd = STDOUT_FILENO;
232 static const struct blobmsg_policy read_policy[] = {
233 [READ_LINE] = { .name = "lines", .type = BLOBMSG_TYPE_ARRAY },
236 static void read_cb(struct ubus_request *req, int type, struct blob_attr *msg)
238 struct blob_attr *cur;
239 struct blob_attr *_tb[__READ_MAX];
246 blobmsg_parse(read_policy, ARRAY_SIZE(read_policy), _tb, blob_data(msg), blob_len(msg));
249 blobmsg_for_each_attr(cur, _tb[READ_LINE], rem) {
250 struct blob_attr *tb[__LOG_MAX];
254 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE)
257 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blobmsg_data(cur), blobmsg_data_len(cur));
258 if (!tb[LOG_MSG] || !tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME])
261 t = blobmsg_get_u64(tb[LOG_TIME]);
262 p = blobmsg_get_u32(tb[LOG_PRIO]);
264 c[strlen(c) - 1] = '\0';
266 printf("%s %s.%s%s %s\n",
267 c, getcodetext(LOG_FAC(p) << 3, facilitynames), getcodetext(LOG_PRI(p), prioritynames),
268 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"),
269 blobmsg_get_string(tb[LOG_MSG]));
273 static int usage(const char *prog)
275 fprintf(stderr, "Usage: %s [options]\n"
277 " -s <path> Path to ubus socket\n"
278 " -l <count> Got only the last 'count' messages\n"
279 " -r <server> <port> Stream message to a server\n"
280 " -F <file> Log file\n"
281 " -S <bytes> Log size\n"
282 " -p <file> PID file\n"
283 " -f Follow log messages\n"
284 " -u Use UDP as the protocol\n"
289 int main(int argc, char **argv)
291 struct ubus_context *ctx;
293 const char *ubus_socket = NULL;
294 int ch, ret, subscribe = 0, lines = 0;
295 static struct blob_buf b;
297 while ((ch = getopt(argc, argv, "ufcs:l:r:F:p:S:")) != -1) {
303 ubus_socket = optarg;
307 log_port = argv[optind++];
319 lines = atoi(optarg);
322 log_size = atoi(optarg);
332 ctx = ubus_connect(ubus_socket);
334 fprintf(stderr, "Failed to connect to ubus\n");
338 ret = ubus_lookup_id(ctx, "log", &id);
340 fprintf(stderr, "Failed to find log object: %s\n", ubus_strerror(ret));
342 if (!subscribe || lines) {
343 blob_buf_init(&b, 0);
345 blobmsg_add_u32(&b, "lines", lines);
346 ubus_invoke(ctx, id, "read", b.head, read_cb, 0, 3000);