From 6400bbc65555324b74b0b7991e0072a40754222d Mon Sep 17 00:00:00 2001
From: meijjaa <jjmeijer88@gmail.com>
Date: Sun, 27 Mar 2016 10:31:42 +0200
Subject: [PATCH] Add powerbtnd from Android-x86 libhardware_legacy

---
 Android.mk  |  20 ++++++++
 powerbtnd.c | 155 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 175 insertions(+)
 create mode 100644 Android.mk
 create mode 100644 powerbtnd.c

diff --git a/Android.mk b/Android.mk
new file mode 100644
index 0000000..2798a7a
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,20 @@
+#
+# Copyright (C) 2016 The Android-x86 Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := powerbtnd.c
+
+LOCAL_MODULE := powerbtnd
+LOCAL_MODULE_TAGS := optional
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+
+include $(BUILD_EXECUTABLE)
diff --git a/powerbtnd.c b/powerbtnd.c
new file mode 100644
index 0000000..855bdc8
--- /dev/null
+++ b/powerbtnd.c
@@ -0,0 +1,155 @@
+/**
+ * A daemon to simulate power button of Android
+ *
+ * Copyright (C) 2011-2012 The Android-x86 Open Source Project
+ *
+ * by Chih-Wei Huang <cwhuang@linux.org.tw>
+ *
+ * Licensed under GPLv2 or later
+ *
+ **/
+
+#define LOG_TAG "powerbtn"
+
+#include <sys/stat.h>
+#include <poll.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <dirent.h>
+#include <string.h>
+#include <cutils/log.h>
+#include <linux/input.h>
+#include <linux/uinput.h>
+#include <cutils/properties.h>
+
+const int MAX_POWERBTNS = 3;
+
+int openfds(struct pollfd pfds[])
+{
+	int cnt = 0;
+	const char *dirname = "/dev/input";
+	DIR *dir;
+	if ((dir = opendir(dirname))) {
+		int fd;
+		struct dirent *de;
+		while ((de = readdir(dir))) {
+			if (de->d_name[0] != 'e') // eventX
+				continue;
+			char name[PATH_MAX];
+			snprintf(name, PATH_MAX, "%s/%s", dirname, de->d_name);
+			fd = open(name, O_RDWR | O_NONBLOCK);
+			if (fd < 0) {
+				ALOGE("could not open %s, %s", name, strerror(errno));
+				continue;
+			}
+			name[sizeof(name) - 1] = '\0';
+			if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) {
+				ALOGE("could not get device name for %s, %s", name, strerror(errno));
+				name[0] = '\0';
+			}
+
+			// TODO: parse /etc/excluded-input-devices.xml
+			if (!strcmp(name, "Power Button")) {
+				ALOGI("open %s(%s) ok fd=%d", de->d_name, name, fd);
+				pfds[cnt].events = POLLIN;
+				pfds[cnt++].fd = fd;
+				if (cnt < MAX_POWERBTNS)
+					continue;
+				else
+					break;
+			}
+			close(fd);
+		}
+		closedir(dir);
+	}
+
+	return cnt;
+}
+
+void send_power(int ufd, int down)
+{
+	struct input_event iev;
+	iev.type  = EV_KEY;
+	iev.code  = KEY_POWER;
+	iev.value = down;
+	write(ufd, &iev, sizeof(iev));
+	iev.type  = EV_SYN;
+	iev.code  = SYN_REPORT;
+	iev.value = 0;
+	write(ufd, &iev, sizeof(iev));
+}
+
+void simulate_powerkey(int ufd, int longpress)
+{
+	send_power(ufd, 1);
+	if (longpress)
+		sleep(2);
+	send_power(ufd, 0);
+}
+
+int main()
+{
+	struct pollfd pfds[MAX_POWERBTNS];
+	int cnt = openfds(pfds);
+	int timeout = -1;
+	int longpress = 1;
+	char prop[PROPERTY_VALUE_MAX];
+
+	int ufd = open("/dev/uinput", O_WRONLY | O_NDELAY);
+	if (ufd >= 0) {
+		struct uinput_user_dev ud;
+		memset(&ud, 0, sizeof(ud));
+		strcpy(ud.name, "Android Power Button");
+		write(ufd, &ud, sizeof(ud));
+		ioctl(ufd, UI_SET_EVBIT, EV_KEY);
+		ioctl(ufd, UI_SET_KEYBIT, KEY_POWER);
+		ioctl(ufd, UI_DEV_CREATE, 0);
+	} else {
+		ALOGE("could not open uinput device: %s", strerror(errno));
+		return -1;
+	}
+
+	property_get("poweroff.doubleclick", prop, NULL);
+
+	for (;;) {
+		int i;
+		int pollres = poll(pfds, cnt, timeout) ;
+		ALOGV("pollres=%d %d\n", pollres, timeout);
+		if (pollres < 0) {
+			ALOGE("poll error: %s", strerror(errno));
+			break;
+		}
+		if (pollres == 0) {
+			ALOGI("timeout, send one power key");
+			simulate_powerkey(ufd, 0);
+			timeout = -1;
+			longpress = 1;
+			continue;
+		}
+		for (i = 0; i < cnt; ++i) {
+			if (pfds[i].revents & POLLIN) {
+				struct input_event iev;
+				size_t res = read(pfds[i].fd, &iev, sizeof(iev));
+				if (res < sizeof(iev)) {
+					ALOGW("insufficient input data(%zd)? fd=%d", res, pfds[i].fd);
+					continue;
+				}
+				ALOGD("type=%d scancode=%d value=%d from fd=%d", iev.type, iev.code, iev.value, pfds[i].fd);
+				if (iev.type == EV_KEY && iev.code == KEY_POWER && !iev.value) {
+					if (prop[0] != '1' || timeout > 0) {
+						simulate_powerkey(ufd, longpress);
+						timeout = -1;
+					} else {
+						timeout = 1000; // one second
+					}
+				} else if (iev.type == EV_SYN && iev.code == SYN_REPORT && iev.value) {
+					ALOGI("got a resuming event");
+					longpress = 0;
+					timeout = 1000; // one second
+				}
+			}
+		}
+	}
+
+	return 0;
+}
-- 
2.11.0