1 files changed, 291 insertions, 0 deletions
diff --git a/src/unitd/system.c b/src/unitd/system.c
new file mode 100644
index 0000000..2316f96
--- /dev/null
+++ b/src/unitd/system.c
@@ -0,0 +1,291 @@
+/*
+ * Copyright (C) 2015 Matthias Schiffer <mschiffer@universe-factory.net>
+ *
+ * Based on "procd" by:
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * 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 "unitd.h"
+#include "watchdog.h"
+
+#include <sys/utsname.h>
+#include <sys/sysinfo.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include <libubox/uloop.h>
+
+
+static struct blob_buf b;
+static int notify;
+static struct ubus_context *_ctx;
+
+static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
+                 struct ubus_request_data *req, const char *method,
+                 struct blob_attr *msg)
+{
+	char line[256];
+	char *key, *val;
+	struct utsname utsname;
+	FILE *f;
+
+	blob_buf_init(&b, 0);
+
+	if (uname(&utsname) >= 0)
+	{
+		blobmsg_add_string(&b, "kernel", utsname.release);
+		blobmsg_add_string(&b, "hostname", utsname.nodename);
+	}
+
+	if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
+	{
+		while(fgets(line, sizeof(line), f))
+		{
+			key = strtok(line, "\t:");
+			val = strtok(NULL, "\t\n");
+
+			if (!key || !val)
+				continue;
+
+			if (!strcasecmp(key, "system type") ||
+			    !strcasecmp(key, "processor") ||
+			    !strcasecmp(key, "model name"))
+			{
+				strtoul(val + 2, &key, 0);
+
+				if (key == (val + 2) || *key != 0)
+				{
+					blobmsg_add_string(&b, "system", val + 2);
+					break;
+				}
+			}
+		}
+
+		fclose(f);
+	}
+
+	else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
+	{
+		while(fgets(line, sizeof(line), f))
+		{
+			key = strtok(line, "\t:");
+			val = strtok(NULL, "\t\n");
+
+			if (!key || !val)
+				continue;
+
+			if (!strcasecmp(key, "machine") ||
+			    !strcasecmp(key, "hardware"))
+			{
+				blobmsg_add_string(&b, "model", val + 2);
+				break;
+			}
+		}
+
+		fclose(f);
+	}
+
+	ubus_send_reply(ctx, req, b.head);
+
+	return UBUS_STATUS_OK;
+}
+
+static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
+                struct ubus_request_data *req, const char *method,
+                struct blob_attr *msg)
+{
+	void *c;
+	time_t now;
+	struct tm *tm;
+	struct sysinfo info;
+
+	now = time(NULL);
+
+	if (!(tm = localtime(&now)))
+		return UBUS_STATUS_UNKNOWN_ERROR;
+
+	if (sysinfo(&info))
+		return UBUS_STATUS_UNKNOWN_ERROR;
+
+	blob_buf_init(&b, 0);
+
+	blobmsg_add_u32(&b, "uptime",    info.uptime);
+	blobmsg_add_u32(&b, "localtime", mktime(tm));
+
+	c = blobmsg_open_array(&b, "load");
+	blobmsg_add_u32(&b, NULL, info.loads[0]);
+	blobmsg_add_u32(&b, NULL, info.loads[1]);
+	blobmsg_add_u32(&b, NULL, info.loads[2]);
+	blobmsg_close_array(&b, c);
+
+	c = blobmsg_open_table(&b, "memory");
+	blobmsg_add_u64(&b, "total",    info.mem_unit * info.totalram);
+	blobmsg_add_u64(&b, "free",     info.mem_unit * info.freeram);
+	blobmsg_add_u64(&b, "shared",   info.mem_unit * info.sharedram);
+	blobmsg_add_u64(&b, "buffered", info.mem_unit * info.bufferram);
+	blobmsg_close_table(&b, c);
+
+	c = blobmsg_open_table(&b, "swap");
+	blobmsg_add_u64(&b, "total",    info.mem_unit * info.totalswap);
+	blobmsg_add_u64(&b, "free",     info.mem_unit * info.freeswap);
+	blobmsg_close_table(&b, c);
+
+	ubus_send_reply(ctx, req, b.head);
+
+	return UBUS_STATUS_OK;
+}
+
+enum {
+	WDT_FREQUENCY,
+	WDT_TIMEOUT,
+	WDT_STOP,
+	__WDT_MAX
+};
+
+static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
+	[WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
+	[WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
+	[WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
+};
+
+static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
+			struct ubus_request_data *req, const char *method,
+			struct blob_attr *msg)
+{
+	struct blob_attr *tb[__WDT_MAX];
+	const char *status;
+
+	if (!msg)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
+	if (tb[WDT_FREQUENCY]) {
+		unsigned int timeout = watchdog_timeout(0);
+		unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
+
+		if (freq) {
+			if (freq > timeout / 2)
+				freq = timeout / 2;
+			watchdog_frequency(freq);
+		}
+	}
+
+	if (tb[WDT_TIMEOUT]) {
+		unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
+		unsigned int frequency = watchdog_frequency(0);
+
+		if (timeout <= frequency)
+			timeout = frequency * 2;
+		 watchdog_timeout(timeout);
+	}
+
+	if (tb[WDT_STOP])
+		watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
+
+	if (watchdog_fd() == NULL)
+		status = "offline";
+	else if (watchdog_get_stopped())
+		status = "stopped";
+	else
+		status = "running";
+
+	blob_buf_init(&b, 0);
+	blobmsg_add_string(&b, "status", status);
+	blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
+	blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
+	ubus_send_reply(ctx, req, b.head);
+
+	return 0;
+}
+
+enum {
+	SIGNAL_PID,
+	SIGNAL_NUM,
+	__SIGNAL_MAX
+};
+
+static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
+	[SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
+	[SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
+};
+
+static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
+			struct ubus_request_data *req, const char *method,
+			struct blob_attr *msg)
+{
+	struct blob_attr *tb[__SIGNAL_MAX];
+
+	if (!msg)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
+	if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
+
+	return 0;
+}
+
+static void
+unitd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
+{
+	notify = obj->has_subscribers;
+}
+
+
+static const struct ubus_method system_methods[] = {
+	UBUS_METHOD_NOARG("board", system_board),
+	UBUS_METHOD_NOARG("info",  system_info),
+	UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
+	UBUS_METHOD("signal", proc_signal, signal_policy),
+};
+
+static struct ubus_object_type system_object_type =
+	UBUS_OBJECT_TYPE("system", system_methods);
+
+static struct ubus_object system_object = {
+	.name = "system",
+	.type = &system_object_type,
+	.methods = system_methods,
+	.n_methods = ARRAY_SIZE(system_methods),
+	.subscribe_cb = unitd_subscribe_cb,
+};
+
+void
+unitd_bcast_event(char *event, struct blob_attr *msg)
+{
+	int ret;
+
+	if (!notify)
+		return;
+
+	ret = ubus_notify(_ctx, &system_object, event, msg, -1);
+	if (ret)
+		fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
+}
+
+void ubus_init_system(struct ubus_context *ctx)
+{
+	int ret;
+
+	_ctx = ctx;
+	ret = ubus_add_object(ctx, &system_object);
+	if (ret)
+		ERROR("Failed to add object: %s\n", ubus_strerror(ret));
+}