Bump ubox-2016-07-19-aead2c0cbffdda9b46d74a998a4c6aeef423b21a

src/3P/ubox/log/logd.c

@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <unistd.h>
+
+#include <linux/types.h>
+
+#include <libubox/uloop.h>
+#include <libubox/blobmsg.h>
+#include <libubox/list.h>
+#include <libubox/ustream.h>
+#include <ubus/libubus.h>
+
+#include "syslog.h"
+
+int debug = 0;
+static struct blob_buf b;
+static struct ubus_auto_conn conn;
+static LIST_HEAD(clients);
+
+static const struct blobmsg_policy read_policy =
+	{ .name = "lines", .type = BLOBMSG_TYPE_INT32 };
+
+static const struct blobmsg_policy write_policy =
+	{ .name = "event", .type = BLOBMSG_TYPE_STRING };
+
+struct client {
+	struct list_head list;
+
+	struct ustream_fd s;
+	int fd;
+};
+
+static void
+client_close(struct ustream *s)
+{
+	struct client *cl = container_of(s, struct client, s.stream);
+
+	list_del(&cl->list);
+	ustream_free(s);
+	close(cl->fd);
+	free(cl);
+}
+
+static void client_notify_state(struct ustream *s)
+{
+	client_close(s);
+}
+
+static int
+read_log(struct ubus_context *ctx, struct ubus_object *obj,
+		struct ubus_request_data *req, const char *method,
+		struct blob_attr *msg)
+{
+	struct client *cl;
+	struct blob_attr *tb;
+	struct log_head *l;
+	int count = 0;
+	int fds[2];
+	int ret;
+
+	if (msg) {
+		blobmsg_parse(&read_policy, 1, &tb, blob_data(msg), blob_len(msg));
+		if (tb)
+			count = blobmsg_get_u32(tb);
+	}
+
+	if (pipe(fds) == -1) {
+		fprintf(stderr, "logd: failed to create pipe: %s\n", strerror(errno));
+		return -1;
+	}
+	ubus_request_set_fd(ctx, req, fds[0]);
+	cl = calloc(1, sizeof(*cl));
+	cl->s.stream.notify_state = client_notify_state;
+	cl->fd = fds[1];
+	ustream_fd_init(&cl->s, cl->fd);
+	list_add(&cl->list, &clients);
+	l = log_list(count, NULL);
+	while ((!tb || count) && l) {
+		blob_buf_init(&b, 0);
+		blobmsg_add_string(&b, "msg", l->data);
+		blobmsg_add_u32(&b, "id", l->id);
+		blobmsg_add_u32(&b, "priority", l->priority);
+		blobmsg_add_u32(&b, "source", l->source);
+		blobmsg_add_u64(&b, "time", l->ts.tv_sec * 1000LL);
+		l = log_list(count, l);
+		ret = ustream_write(&cl->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
+		blob_buf_free(&b);
+		if (ret < 0)
+			break;
+	}
+	return 0;
+}
+
+static int
+write_log(struct ubus_context *ctx, struct ubus_object *obj,
+		struct ubus_request_data *req, const char *method,
+		struct blob_attr *msg)
+{
+	struct blob_attr *tb;
+	char *event;
+
+	if (msg) {
+		blobmsg_parse(&write_policy, 1, &tb, blob_data(msg), blob_len(msg));
+		if (tb) {
+			event = blobmsg_get_string(tb);
+			log_add(event, strlen(event) + 1, SOURCE_SYSLOG);
+		}
+	}
+
+	return 0;
+}
+
+static const struct ubus_method log_methods[] = {
+	{ .name = "read", .handler = read_log, .policy = &read_policy, .n_policy = 1 },
+	{ .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
+};
+
+static struct ubus_object_type log_object_type =
+	UBUS_OBJECT_TYPE("log", log_methods);
+
+static struct ubus_object log_object = {
+	.name = "log",
+	.type = &log_object_type,
+	.methods = log_methods,
+	.n_methods = ARRAY_SIZE(log_methods),
+};
+
+void
+ubus_notify_log(struct log_head *l)
+{
+	struct client *c;
+
+	if (list_empty(&clients))
+		return;
+
+	blob_buf_init(&b, 0);
+	blobmsg_add_string(&b, "msg", l->data);
+	blobmsg_add_u32(&b, "id", l->id);
+	blobmsg_add_u32(&b, "priority", l->priority);
+	blobmsg_add_u32(&b, "source", l->source);
+	blobmsg_add_u64(&b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
+
+	list_for_each_entry(c, &clients, list)
+		ustream_write(&c->s.stream, (void *) b.head, blob_len(b.head) + sizeof(struct blob_attr), false);
+
+	blob_buf_free(&b);
+}
+
+static void
+ubus_connect_handler(struct ubus_context *ctx)
+{
+	int ret;
+
+	ret = ubus_add_object(ctx, &log_object);
+	if (ret) {
+		fprintf(stderr, "Failed to add object: %s\n", ubus_strerror(ret));
+		exit(1);
+	}
+	fprintf(stderr, "log: connected to ubus\n");
+}
+
+int
+main(int argc, char **argv)
+{
+	int ch, log_size = 16;
+
+	signal(SIGPIPE, SIG_IGN);
+	while ((ch = getopt(argc, argv, "S:")) != -1) {
+		switch (ch) {
+		case 'S':
+			log_size = atoi(optarg);
+			if (log_size < 1)
+				log_size = 16;
+			break;
+		}
+	}
+	log_size *= 1024;
+
+	uloop_init();
+	log_init(log_size);
+	conn.cb = ubus_connect_handler;
+	ubus_auto_connect(&conn);
+	uloop_run();
+	log_shutdown();
+	uloop_done();
+
+	return 0;
+}