Operating System – Water's Home

openEuler

Posted on March 28, 2020August 26, 2020 by admin

Some differences between JEB and GDA

Posted on November 28, 2019 by admin

Android Studio 3.5.2

JEB 3

GDA 3.66

Android Studio 3.5.2

JEB 3

GDA 3.66

Android keystore jks pk8 x509.pem

Posted on November 27, 2019 by admin

Lists entries in a keystore

keytool -list -v -keystore platform.keystore

Generate Signed APK Using jarsigner

jarsigner -verbose -keystore platform.keystore -signedjar app-debug-signed.apk app-debug.apk alias-name

pk8 & x509.pem -> keystore

./keytool-importkeypair -k ./oldplatform.keystore -p password -pk8 ../platform.pk8 -cert ../platform.x509.pem -alias alias-name

keystore -> p12 -> jks

keytool -importkeystore -srckeystore platform.keystore -srcstoretype JKS -deststoretype PKCS12 -destkeystore platform.keystore.p12

keytool -v -importkeystore -srckeystore platform.keystore.p12 -srcstoretype PKCS12 -destkeystore platform.keystore.jks -deststoretype JKS

Generate Signed APK Using Android Studio

The IDA Pro Book (2ND EDITION) Notes

Posted on November 24, 2019 by admin

Using X11 for GUI

Posted on November 20, 2019 by admin

Result

Code

```
#include <X11/Xlib.h>
```
```
#include <X11/Xlocale.h>
```
```
#include <stdio.h>
```
```
#include <stdlib.h>
```
```
#include <string.h>
```
```
 
```
```
void
```

DrawCenteredMbString(Display* dpy, Window w, XFontSet fontset, GC gc, char* str, int num_bytes, int x, int y, int width,

```
	int height) {
```
```
	XRectangle boundingbox;
```
```
	XRectangle dummy;
```
```
	int originx, originy;
```
```
 
```

	(void)XmbTextExtents(fontset, str, num_bytes, &dummy, &boundingbox);

```
 
```

	originx = x + (width - boundingbox.width) / 2 - boundingbox.x;

	originy = y + (height - boundingbox.height) / 2 - boundingbox.y;

```
 
```

	XmbDrawString(dpy, w, fontset, gc, originx, originy, str, num_bytes);

```
}
```
```
 
```
```
int main(void) {
```
```
	Display* d;
```
```
	Window w;
```
```
	GC gc;
```
```
	XGCValues values;
```
```
	XEvent e;
```
```
	XFontStruct* fs, * fs16;
```
```
	char** fonts;
```
```
	int font_count;
```
```
	XFontSet fontset;
```
```
	char** missing_charsets;
```
```
	int num_missing_charsets;
```
```
	char* default_string;
```
```
 
```
```
	char* msg = "Hello, World!";
```

	char* msg2 = "啊，世界，啊啊啊";

```
	int s;
```
```
 
```
```
	if (setlocale(LC_ALL, "") == NULL) {
```
```
		printf("cannot set locale \n");
```
```
		exit(1);
```
```
	}
```
```
 
```
```
	if (!XSupportsLocale()) {
```

		printf("X does not support locale %s\n", setlocale(LC_ALL, NULL));

```
		exit(1);
```
```
	}
```
```
 
```
```
	if (XSetLocaleModifiers("") == NULL) {
```

		printf("Warning: cannot set locale modifiers\n");

```
	}
```
```
 
```
```
 
```
```
	d = XOpenDisplay(NULL);
```
```
	if (d == NULL) {
```

		fprintf(stderr, "Cannot open display\n");

```
		exit(1);
```
```
	}
```
```
 
```

	fonts = XListFonts(d, "*hanzi*", 10000, &font_count);

```
	for (int i = 0; i < font_count; i++)
```
```
		printf("%s\n", fonts[i]);
```
```
	XFreeFontNames(fonts);
```
```
 
```

	if ((fs16 = XLoadQueryFont(d, "hanzigb16st")) == NULL) {

```
		printf("Cannot load font\n");
```
```
		exit(1);
```
```
	}
```
```
 
```
```
	s = DefaultScreen(d);
```

	w = XCreateSimpleWindow(d, RootWindow(d, s), 100, 100, 500, 500, 1,

```
		777215, 111111);
```

	printf("BlackPixel(d, s) is %d\n", (int)BlackPixel(d, s));

	printf("WhitePixel(d, s) is %d\n", (int)WhitePixel(d, s));

```
 
```
```
	fontset = XCreateFontSet(
```
```
		d, "-*-*-*-*-*-*-16-*-*-*-*-*-*-*",
```

		&missing_charsets, &num_missing_charsets,

```
		&default_string);
```
```
	if (num_missing_charsets > 0) {
```

		printf("The following charsets are missing\n");

		for (int i = 0; i < num_missing_charsets; i++) {

```
			printf("%s \n", missing_charsets);
```

			printf("The string is %s \n", default_string);

			printf("of any characters from those sets\n");

```
		}
```
```
		XFreeStringList(missing_charsets);
```
```
	}
```

	XSetLineAttributes(d, gc, 5, LineSolid, CapRound, JoinRound);

```
 
```
```
 
```

	XSelectInput(d, w, ExposureMask | KeyPressMask);

```
	gc = XCreateGC(d, w, 0, &values);
```
```
	XMapWindow(d, w);
```
```
 
```
```
	int y = 50;
```
```
	for (int i = 0; i < 10; i++) {
```
```
 
```

		//XFillRectangle(d, w, DefaultGC(d, s), 20, 20, 10, 10);

		XDrawString(d, w, DefaultGC(d, s), 10, y + i * 20, msg, strlen(msg));

```
 
```
```
		//XSetFont(d, gc, fs16->fid);
```

		//XDrawString16(d, w, gc, 100, y + i * 20, (XChar2b *) msg2, strlen(msg2) / 2);

```
 
```
```
		int msg_len = strlen(msg2);
```
```
 
```
```
		DrawCenteredMbString(
```
```
			d, w, fontset, gc,
```
```
			msg2,
```
```
			msg_len, 50, y + i * 20, 100, 50);
```
```
 
```
```
		XFlush(d);
```
```
		sleep(1);
```
```
 
```
```
	}
```
```
 
```
```
	/*while(1) {
```
```
		XNextEvent(d, &e);
```
```
		if (e.type == KeyPress)
```
```
		  break;
```
```
	}*/
```
```
 
```
```
	XCloseDisplay(d);
```
```
	return 0;
```
```
}
```

How to Enable Case Sensitive File and Folder Names on Windows 10

Posted on October 11, 2019 by admin

Enable Windows Subsystem Linux

Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux

setCaseSensitiveInfo enable/disable

fsutil.exe file setCaseSensitiveInfo linux\netfilter_ipv4 enable

queryCaseCaseSensitiveInfo

fsutil.exe file queryCaseCaseSensitiveInfo D:\linux-3.0.35\include\linux\netfilter

This Doesn’t Affect Subfolders

Generate an incremental OTA

Posted on September 26, 2019 by admin

Generate an OTA

```
make -j8
```
```
make otapackage
```

Generate an incremental OTA

./build/tools/releasetools/ota_from_target_files -i ./OTA/base.zip ./OTA/target_files.zip ./OTA/update.zip

Android ADB Shell Commands Notes

Posted on September 26, 2019 by admin

Prints a list of all attached emulator/device

```
>adb devices
```
```
List of devices attached
```
```
xxxxxxxxxx      device
```

Forward socket connections

```
>adb forward tcp:10172 tcp:9999
```

Restarts the adbd daemon with Root permissions

>adb root

Put /system partition in Writable mode

>adb remount
remount succeeded

Upload a specified file from your computer to an emulator/device

>adb -s xxxxxxxxxx push term_emv_clc2 /system/tmp

Shell command mode

```
>adb shell
```

How to compile Lua for Android

Posted on September 19, 2019September 26, 2019 by admin

Update lmathlib.c

```
Index: lmathlib.c
```

===================================================================

```
--- lmathlib.c	(revision 4050)
```
```
+++ lmathlib.c	(revision 4051)
```
```
@@ -183,10 +183,10 @@
```
```
     res = l_mathop(log)(x);
```
```
   else {
```

     lua_Number base = luaL_checknumber(L, 2);

```
-#if !defined(LUA_USE_C89)
```
```
-    if (base == l_mathop(2.0))
```
```
-      res = l_mathop(log2)(x); else
```
```
-#endif
```
```
+//#if !defined(LUA_USE_C89)
```
```
+//    if (base == l_mathop(2.0))
```
```
+//      res = l_mathop(log2)(x); else
```
```
+//#endif
```
```
     if (base == l_mathop(10.0))
```
```
       res = l_mathop(log10)(x);
```
```
     else
```

Update luaconf.h

```
Index: luaconf.h
```

===================================================================

```
--- luaconf.h	(revision 4050)
```
```
+++ luaconf.h	(revision 4051)
```
```
@@ -677,7 +677,7 @@
```

 ** macro must include header 'locale.h'.)

```
 */
```
```
 #if !defined(lua_getlocaledecpoint)
```

-#define lua_getlocaledecpoint()		(localeconv()->decimal_point[0])

```
+#define lua_getlocaledecpoint()		('.')
```
```
 #endif
```
```
 
```

 /* }================================================================== */

Android.mk

```
#
```
```
# Android.mk
```
```
#
```
```
# Lua
```
```
#
```
```
LOCAL_PATH := $(call my-dir)/../src
```
```
 
```
```
include $(CLEAR_VARS)
```
```
 
```
```
LOCAL_MODULE     := Lua
```
```
LOCAL_CPPFLAGS   := -std=c++17
```
```
LOCAL_SRC_FILES := \
```
```
    $(LOCAL_PATH)/lapi.c \
```
```
    $(LOCAL_PATH)/lauxlib.c \
```
```
    $(LOCAL_PATH)/lbaselib.c \
```
```
    $(LOCAL_PATH)/lbitlib.c \
```
```
    $(LOCAL_PATH)/lcode.c \
```
```
    $(LOCAL_PATH)/lcorolib.c \
```
```
    $(LOCAL_PATH)/lctype.c \
```
```
    $(LOCAL_PATH)/ldblib.c \
```
```
    $(LOCAL_PATH)/ldebug.c \
```
```
    $(LOCAL_PATH)/ldo.c \
```
```
    $(LOCAL_PATH)/ldump.c \
```
```
    $(LOCAL_PATH)/lfunc.c \
```
```
    $(LOCAL_PATH)/lgc.c \
```
```
    $(LOCAL_PATH)/linit.c \
```
```
    $(LOCAL_PATH)/liolib.c \
```
```
    $(LOCAL_PATH)/llex.c \
```
```
    $(LOCAL_PATH)/lmathlib.c \
```
```
    $(LOCAL_PATH)/lmem.c \
```
```
    $(LOCAL_PATH)/loadlib.c \
```
```
    $(LOCAL_PATH)/lobject.c \
```
```
    $(LOCAL_PATH)/lopcodes.c \
```
```
    $(LOCAL_PATH)/loslib.c \
```
```
    $(LOCAL_PATH)/lparser.c \
```
```
    $(LOCAL_PATH)/lstate.c \
```
```
    $(LOCAL_PATH)/lstring.c \
```
```
    $(LOCAL_PATH)/lstrlib.c \
```
```
    $(LOCAL_PATH)/ltable.c \
```
```
    $(LOCAL_PATH)/ltablib.c \
```
```
    $(LOCAL_PATH)/ltm.c \
```
```
    $(LOCAL_PATH)/lua.c \
```
```
    $(LOCAL_PATH)/luac.c \
```
```
    $(LOCAL_PATH)/lundump.c \
```
```
    $(LOCAL_PATH)/lutf8lib.c \
```
```
    $(LOCAL_PATH)/lvm.c \
```
```
    $(LOCAL_PATH)/lzio.c
```
```
 
```
```
include $(BUILD_STATIC_LIBRARY)
```

Android NDK C++17 Support

Posted on September 19, 2019September 19, 2019 by admin

build.gradle

```
apply plugin: 'com.android.application'
```
```
 
```
```
android {
```
```
    compileSdkVersion 29
```
```
    buildToolsVersion "29.0.2"
```
```
    defaultConfig {
```

        applicationId "com.example.myapplication"

```
        minSdkVersion 15
```
```
        targetSdkVersion 29
```
```
        versionCode 1
```
```
        versionName "1.0"
```

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

```
        externalNativeBuild {
```
```
            cmake {
```
```
                cppFlags "-std=c++17"
```
```
            }
```
```
        }
```
```
    }
```
```
    buildTypes {
```
```
        release {
```
```
            minifyEnabled false
```

            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'

```
        }
```
```
    }
```
```
    externalNativeBuild {
```
```
        cmake {
```

            path "src/main/cpp/CMakeLists.txt"

```
            version "3.10.2"
```
```
        }
```
```
    }
```
```
}
```
```
 
```
```
dependencies {
```

    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'androidx.appcompat:appcompat:1.0.2'

    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'

    testImplementation 'junit:junit:4.12'

    androidTestImplementation 'androidx.test:runner:1.1.1'

    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'

```
}
```