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 void log_handle_reconnect(struct uloop_timeout *timeout)
65 sender.fd = usock((log_udp) ? (USOCK_UDP) : (USOCK_TCP), log_ip, log_port);
67 fprintf(stderr, "failed to connect: %s\n", strerror(errno));
68 uloop_timeout_set(&retry, 1000);
70 uloop_fd_add(&sender, ULOOP_READ);
71 syslog(0, "Logread connected to %s:%s\n", log_ip, log_port);
75 static void log_handle_remove(struct ubus_context *ctx, struct ubus_subscriber *s,
78 fprintf(stderr, "Object %08x went away\n", id);
81 static void log_handle_fd(struct uloop_fd *u, unsigned int events)
87 uloop_timeout_set(&retry, 1000);
91 static int log_notify(struct ubus_context *ctx, struct ubus_object *obj,
92 struct ubus_request_data *req, const char *method,
93 struct blob_attr *msg)
95 struct blob_attr *tb[__LOG_MAX];
106 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blob_data(msg), blob_len(msg));
107 if (!tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME])
110 if ((log_type == LOG_FILE) && log_size && (!stat(log_file, &s)) && (s.st_size > log_size)) {
111 char *old = malloc(strlen(log_file) + 5);
115 sprintf(old, "%s.old", log_file);
116 rename(log_file, old);
119 sender.fd = open(log_file, O_CREAT | O_WRONLY | O_APPEND, 0600);
121 // fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
126 t = blobmsg_get_u64(tb[LOG_TIME]) / 1000;
128 p = blobmsg_get_u32(tb[LOG_PRIO]);
129 c[strlen(c) - 1] = '\0';
130 str = blobmsg_format_json(msg, true);
131 if (log_type == LOG_NET) {
134 snprintf(buf, sizeof(buf), "%s%s\n",
135 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : ("kernel: "),
138 err = write(sender.fd, buf, strlen(buf));
140 err = send(sender.fd, buf, strlen(buf), 0);
143 syslog(0, "failed to send log data to %s:%s via %s\n",
144 log_ip, log_port, (log_udp) ? ("udp") : ("tcp"));
145 uloop_fd_delete(&sender);
148 uloop_timeout_set(&retry, 1000);
151 snprintf(buf, sizeof(buf), "%s %s.%s%s %s\n",
152 c, facilitynames[LOG_FAC(p)].c_name, prioritynames[LOG_PRI(p)].c_name,
153 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"),
155 write(sender.fd, buf, strlen(buf));
159 if (log_type == LOG_FILE)
165 static void follow_log(struct ubus_context *ctx, int id)
170 signal(SIGPIPE, SIG_IGN);
173 fp = fopen(pid_file, "w+");
175 fprintf(fp, "%d", getpid());
183 log_event.remove_cb = log_handle_remove;
184 log_event.cb = log_notify;
185 ret = ubus_register_subscriber(ctx, &log_event);
187 fprintf(stderr, "Failed to add watch handler: %s\n", ubus_strerror(ret));
189 ret = ubus_subscribe(ctx, &log_event, id);
191 fprintf(stderr, "Failed to add watch handler: %s\n", ubus_strerror(ret));
193 if (log_ip && log_port) {
194 openlog("logread", LOG_PID, LOG_DAEMON);
196 sender.cb = log_handle_fd;
197 retry.cb = log_handle_reconnect;
198 uloop_timeout_set(&retry, 1000);
199 } else if (log_file) {
201 sender.fd = open(log_file, O_CREAT | O_WRONLY| O_APPEND, 0600);
203 fprintf(stderr, "failed to open %s: %s\n", log_file, strerror(errno));
207 sender.fd = STDOUT_FILENO;
220 static const struct blobmsg_policy read_policy[] = {
221 [READ_LINE] = { .name = "lines", .type = BLOBMSG_TYPE_ARRAY },
224 static void read_cb(struct ubus_request *req, int type, struct blob_attr *msg)
226 struct blob_attr *cur;
227 struct blob_attr *_tb[__READ_MAX];
234 blobmsg_parse(read_policy, ARRAY_SIZE(read_policy), _tb, blob_data(msg), blob_len(msg));
237 blobmsg_for_each_attr(cur, _tb[READ_LINE], rem) {
238 struct blob_attr *tb[__LOG_MAX];
242 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE)
245 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blobmsg_data(cur), blobmsg_data_len(cur));
246 if (!tb[LOG_MSG] || !tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME])
249 t = blobmsg_get_u64(tb[LOG_TIME]);
250 p = blobmsg_get_u32(tb[LOG_PRIO]);
252 c[strlen(c) - 1] = '\0';
254 printf("%s %s.%s%s %s\n",
255 c, facilitynames[LOG_FAC(p)].c_name, prioritynames[LOG_PRI(p)].c_name,
256 (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("") : (" kernel:"),
257 blobmsg_get_string(tb[LOG_MSG]));
261 static int usage(const char *prog)
263 fprintf(stderr, "Usage: %s [options]\n"
265 " -s <path> Path to ubus socket\n"
266 " -l <count> Got only the last 'count' messages\n"
267 " -r <server> <port> Stream message to a server\n"
268 " -F <file> Log file\n"
269 " -S <bytes> Log size\n"
270 " -p <file> PID file\n"
271 " -f Follow log messages\n"
272 " -u Use UDP as the protocol\n"
277 int main(int argc, char **argv)
279 struct ubus_context *ctx;
281 const char *ubus_socket = NULL;
282 int ch, ret, subscribe = 0, lines = 0;
283 static struct blob_buf b;
285 while ((ch = getopt(argc, argv, "ufcs:l:r:F:p:S:")) != -1) {
291 ubus_socket = optarg;
295 log_port = argv[optind++];
307 lines = atoi(optarg);
310 log_size = atoi(optarg);
320 ctx = ubus_connect(ubus_socket);
322 fprintf(stderr, "Failed to connect to ubus\n");
326 ret = ubus_lookup_id(ctx, "log", &id);
328 fprintf(stderr, "Failed to find log object: %s\n", ubus_strerror(ret));
330 if (!subscribe || lines) {
331 blob_buf_init(&b, 0);
333 blobmsg_add_u32(&b, "lines", lines);
334 ubus_invoke(ctx, id, "read", b.head, read_cb, 0, 3000);