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>
49 static const struct blobmsg_policy log_policy[] = {
50 [LOG_MSG] = { .name = "msg", .type = BLOBMSG_TYPE_STRING },
51 [LOG_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
52 [LOG_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
53 [LOG_SOURCE] = { .name = "source", .type = BLOBMSG_TYPE_INT32 },
54 [LOG_TIME] = { .name = "time", .type = BLOBMSG_TYPE_INT64 },
57 static struct ubus_subscriber log_event;
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;
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_remove(struct ubus_context *ctx, struct ubus_subscriber *s,
89 fprintf(stderr, "Object %08x went away\n", id);
92 static void log_handle_fd(struct uloop_fd *u, unsigned int events)
98 uloop_timeout_set(&retry, 1000);
102 static int log_notify(struct ubus_context *ctx, struct ubus_object *obj,
103 struct ubus_request_data *req, const char *method,
104 struct blob_attr *msg)
106 struct blob_attr *tb[__LOG_MAX];
117 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blob_data(msg), blob_len(msg));
118 if (!tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME])
121 if ((log_type == LOG_FILE) && log_size && (!stat(log_file, &s)) && (s.st_size > log_size)) {
122 char *old = malloc(strlen(log_file) + 5);
126 sprintf(old, "%s.old", log_file);
127 rename(log_file, old);
130 sender.fd = open(log_file, O_CREAT | O_WRONLY | O_APPEND, 0600);
132 // fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
137 t = blobmsg_get_u64(tb[LOG_TIME]) / 1000;
139 p = blobmsg_get_u32(tb[LOG_PRIO]);
140 c[strlen(c) - 1] = '\0';
141 str = blobmsg_format_json(msg, true);
142 if (log_type == LOG_NET) {
147 snprintf(buf, sizeof(buf), "%s ", hostname);
149 strncat(buf, log_prefix, sizeof(buf));
150 strncat(buf, ": ", sizeof(buf));
152 if (blobmsg_get_u32(tb[LOG_SOURCE]) == SOURCE_KLOG)
153 strncat(buf, "kernel: ", sizeof(buf));
154 strncat(buf, method, sizeof(buf));
156 err = write(sender.fd, buf, strlen(buf));
158 err = send(sender.fd, buf, strlen(buf), 0);
161 syslog(0, "failed to send log data to %s:%s via %s\n",
162 log_ip, log_port, (log_udp) ? ("udp") : ("tcp"));
163 uloop_fd_delete(&sender);
166 uloop_timeout_set(&retry, 1000);
169 snprintf(buf, sizeof(buf), "%s %s.%s%s %s\n",
170 c, getcodetext(LOG_FAC(p) << 3, facilitynames), getcodetext(LOG_PRI(p), prioritynames),
171 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"),
173 write(sender.fd, buf, strlen(buf));
177 if (log_type == LOG_FILE)
183 static void follow_log(struct ubus_context *ctx, int id)
188 signal(SIGPIPE, SIG_IGN);
191 fp = fopen(pid_file, "w+");
193 fprintf(fp, "%d", getpid());
201 log_event.remove_cb = log_handle_remove;
202 log_event.cb = log_notify;
203 ret = ubus_register_subscriber(ctx, &log_event);
205 fprintf(stderr, "Failed to add watch handler: %s\n", ubus_strerror(ret));
207 ret = ubus_subscribe(ctx, &log_event, id);
209 fprintf(stderr, "Failed to add watch handler: %s\n", ubus_strerror(ret));
211 if (log_ip && log_port) {
212 openlog("logread", LOG_PID, LOG_DAEMON);
214 sender.cb = log_handle_fd;
215 retry.cb = log_handle_reconnect;
216 uloop_timeout_set(&retry, 1000);
217 } else if (log_file) {
219 sender.fd = open(log_file, O_CREAT | O_WRONLY| O_APPEND, 0600);
221 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
225 sender.fd = STDOUT_FILENO;
240 static const struct blobmsg_policy read_policy[] = {
241 [READ_LINE] = { .name = "lines", .type = BLOBMSG_TYPE_ARRAY },
244 static void read_cb(struct ubus_request *req, int type, struct blob_attr *msg)
246 struct blob_attr *cur;
247 struct blob_attr *_tb[__READ_MAX];
254 blobmsg_parse(read_policy, ARRAY_SIZE(read_policy), _tb, blob_data(msg), blob_len(msg));
257 blobmsg_for_each_attr(cur, _tb[READ_LINE], rem) {
258 struct blob_attr *tb[__LOG_MAX];
262 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE)
265 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blobmsg_data(cur), blobmsg_data_len(cur));
266 if (!tb[LOG_MSG] || !tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME])
269 t = blobmsg_get_u64(tb[LOG_TIME]);
270 p = blobmsg_get_u32(tb[LOG_PRIO]);
272 c[strlen(c) - 1] = '\0';
274 printf("%s %s.%s%s %s\n",
275 c, getcodetext(LOG_FAC(p) << 3, facilitynames), getcodetext(LOG_PRI(p), prioritynames),
276 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"),
277 blobmsg_get_string(tb[LOG_MSG]));
281 static int usage(const char *prog)
283 fprintf(stderr, "Usage: %s [options]\n"
285 " -s <path> Path to ubus socket\n"
286 " -l <count> Got only the last 'count' messages\n"
287 " -r <server> <port> Stream message to a server\n"
288 " -F <file> Log file\n"
289 " -S <bytes> Log size\n"
290 " -p <file> PID file\n"
291 " -h <hostname> Add hostname to the message\n"
292 " -P <prefix> Prefix custom text to streamed messages\n"
293 " -f Follow log messages\n"
294 " -u Use UDP as the protocol\n"
299 int main(int argc, char **argv)
301 struct ubus_context *ctx;
303 const char *ubus_socket = NULL;
304 int ch, ret, subscribe = 0, lines = 0;
305 static struct blob_buf b;
307 while ((ch = getopt(argc, argv, "ufcs:l:r:F:p:S:P:h:")) != -1) {
313 ubus_socket = optarg;
317 log_port = argv[optind++];
332 lines = atoi(optarg);
335 log_size = atoi(optarg);
348 ctx = ubus_connect(ubus_socket);
350 fprintf(stderr, "Failed to connect to ubus\n");
354 ret = ubus_lookup_id(ctx, "log", &id);
356 fprintf(stderr, "Failed to find log object: %s\n", ubus_strerror(ret));
358 if (!subscribe || lines) {
359 blob_buf_init(&b, 0);
361 blobmsg_add_u32(&b, "lines", lines);
362 ubus_invoke(ctx, id, "read", b.head, read_cb, 0, 3000);