Merge "Log pid for writes to sys.powerctl" (2827106d) · Commits · e / os / android_system_core

init/property_service.cpp

+16 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,7 @@
		#include <android-base/file.h>
		#include <android-base/logging.h>
		#include <android-base/properties.h>
		#include <android-base/stringprintf.h>
		#include <android-base/strings.h>
		#include <bootimg.h>
		#include <fs_mgr.h>
		@@ -56,6 +57,7 @@
		#include "persistent_properties.h"
		#include "util.h"

		using android::base::StringPrintf;
		using android::base::Timer;

		#define RECOVERY_MOUNT_POINT "/recovery"
		@@ -418,6 +420,20 @@ static void handle_property_set(SocketConnection& socket,
		}
		} else {
		if (check_mac_perms(name, source_ctx, &cr)) {
		// sys.powerctl is a special property that is used to make the device reboot. We want to log
		// any process that sets this property to be able to accurately blame the cause of a shutdown.
		if (name == "sys.powerctl") {
		std::string cmdline_path = StringPrintf("proc/%d/cmdline", cr.pid);
		std::string process_cmdline;
		std::string process_log_string;
		if (android::base::ReadFileToString(cmdline_path, &process_cmdline)) {
		// Since cmdline is null deliminated, .c_str() conveniently gives us just the process path.
		process_log_string = StringPrintf(" (%s)", process_cmdline.c_str());
		}
		LOG(INFO) << "Received sys.powerctl='" << value << "' from pid: " << cr.pid
		<< process_log_string;
		}

		uint32_t result = property_set(name, value);
		if (!legacy_protocol) {
		socket.SendUint32(result);