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.
19 #include <libubox/blobmsg_json.h>
20 #include <libubox/uloop.h>
32 static const struct blobmsg_policy log_policy[] = {
33 [LOG_MSG] = { .name = "msg", .type = BLOBMSG_TYPE_STRING },
34 [LOG_ID] = { .name = "id", .type = BLOBMSG_TYPE_INT32 },
35 [LOG_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
36 [LOG_SOURCE] = { .name = "source", .type = BLOBMSG_TYPE_INT32 },
37 [LOG_TIME] = { .name = "time", .type = BLOBMSG_TYPE_INT64 },
46 static struct ubus_subscriber log_event;
48 static void log_handle_remove(struct ubus_context *ctx, struct ubus_subscriber *s,
51 fprintf(stderr, "Object %08x went away\n", id);
54 static int log_notify(struct ubus_context *ctx, struct ubus_object *obj,
55 struct ubus_request_data *req, const char *method,
56 struct blob_attr *msg)
58 struct blob_attr *tb[__LOG_MAX];
63 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blob_data(msg), blob_len(msg));
64 if (!tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME])
67 t = blobmsg_get_u64(tb[LOG_TIME]) / 1000;
69 c[strlen(c) - 1] = '\0';
70 str = blobmsg_format_json(msg, true);
71 printf("%s - %s: %s\n",
72 c, (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("syslog") : ("kernel"), method);
78 static void follow_log(struct ubus_context *ctx, int id)
85 log_event.remove_cb = log_handle_remove;
86 log_event.cb = log_notify;
87 ret = ubus_register_subscriber(ctx, &log_event);
89 fprintf(stderr, "Failed to add watch handler: %s\n", ubus_strerror(ret));
91 ret = ubus_subscribe(ctx, &log_event, id);
93 fprintf(stderr, "Failed to add watch handler: %s\n", ubus_strerror(ret));
105 static const struct blobmsg_policy read_policy[] = {
106 [READ_LINE] = { .name = "lines", .type = BLOBMSG_TYPE_ARRAY },
109 static void read_cb(struct ubus_request *req, int type, struct blob_attr *msg)
111 struct blob_attr *cur;
112 struct blob_attr *_tb[__READ_MAX];
119 blobmsg_parse(read_policy, ARRAY_SIZE(read_policy), _tb, blob_data(msg), blob_len(msg));
122 blobmsg_for_each_attr(cur, _tb[READ_LINE], rem) {
123 struct blob_attr *tb[__LOG_MAX];
126 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE)
129 blobmsg_parse(log_policy, ARRAY_SIZE(log_policy), tb, blobmsg_data(cur), blobmsg_data_len(cur));
130 if (!tb[LOG_MSG] || !tb[LOG_ID] || !tb[LOG_PRIO] || !tb[LOG_SOURCE] || !tb[LOG_TIME])
133 t = blobmsg_get_u64(tb[LOG_TIME]) / 1000;
135 c[strlen(c) - 1] = '\0';
136 printf("%s - %s: %s\n",
137 c, (blobmsg_get_u32(tb[LOG_SOURCE])) ? ("syslog") : ("kernel"),
138 blobmsg_get_string(tb[LOG_MSG]));
142 static int usage(const char *prog)
144 fprintf(stderr, "Usage: %s [options]\n"
146 " -s <path> Path to ubus socket\n"
147 " -l <count> Got only the last 'count' messages\n"
148 " -f Follow log messages\n"
153 int main(int argc, char **argv)
155 struct ubus_context *ctx;
157 const char *ubus_socket = NULL;
158 int ch, ret, subscribe = 0, lines = 0;
159 static struct blob_buf b;
161 while ((ch = getopt(argc, argv, "fs:l:")) != -1) {
164 ubus_socket = optarg;
170 lines = atoi(optarg);
178 ctx = ubus_connect(ubus_socket);
180 fprintf(stderr, "Failed to connect to ubus\n");
184 ret = ubus_lookup_id(ctx, "log", &id);
186 fprintf(stderr, "Failed to find log object: %s\n", ubus_strerror(ret));
188 if (!subscribe || lines) {
189 blob_buf_init(&b, 0);
191 blobmsg_add_u32(&b, "lines", lines);
192 ubus_invoke(ctx, id, "read", b.head, read_cb, 0, 3000);