BinaryCell

Blogger migration from google+

2019-03-29T22:12:00.003+01:00

Due to google+ shutdown, I removed all G+ references on blog

Gradle for speed up compilation times

2015-12-21T00:43:00.000+01:00

Thanks to cocos2d-x framework I knew about Gradle, a type of cache for development, and can be used to build farms.

$ touch ~/.gradle/gradle.properties && echo "org.gradle.daemon=true" >> ~/.gradle/gradle.properties
$ gradle

https://docs.gradle.org/2.4/userguide/gradle_daemon.html

Is your VirtualBox reading your E-Mail?

2015-03-22T19:46:00.001+01:00

Interesting article about reading screen buffers from VRAM from [hsmr]

I hate videotutorials related with development

2015-03-17T09:07:00.000+01:00

https://youtu.be/hMptGzvAutA 13 minutes video explaining sizeof in C language...

I hate developer related videotutorials... html or pdf are fine... but VIDEO? are you serious?

"Kernel booting process" Great must-read

2015-02-08T16:05:00.000+01:00

"A series of posts about the linux kernel.
The goal is simple - to share my modest knowledge about the internals of the linux kernel and help people who are interested in the linux kernel, and other low-level subject matter."

https://github.com/0xAX/linux-insides/tree/master

Converting a video into a 3D mesh with free software

2015-01-13T21:40:00.004+01:00

From: Cícero Moraes site

Multitasking Management in the Operating System Kernel

2014-05-23T12:41:00.003+02:00

Great article about multitasking at OS level

http://kukuruku.co/hub/opensource/multitasking-management-in-the-operating-system-kernel

Source: reddit

Great iOS apps for developers

2014-05-08T22:54:00.001+02:00

Textastic and iSSH, th best apps I meet for iPad remote productivity

https://itunes.apple.com/es/app/textastic-code-editor-for/id383577124

https://itunes.apple.com/es/app/issh-ssh-vnc-console/id287765826

Screen blanking in Qi-Hardware Ben NanoNote

2014-03-06T09:58:00.002+01:00

When using Qi-Hardware Ben NanoNote gadget as monitoring other machines (like a server) via usb-net (is pretty cool as small monitor display) but by default OpenWRT firmware blanks the screen after a while.

I wrote a small shell script for avoid this:


#!/bin/sh

infodir="/sys/class/power_supply/usb"
connected=`cat $infodir/online`

if [ "0" = $connected ]
then

    setterm -blank 1 > /dev/tty0
    echo "`date` - Battery, enabled screen blanking"
else
    setterm -blank 0 > /dev/tty0
echo "`date` - Connected, disabled screen blanking"
fi

This cannot be used in a crontab (the original idea) but is useful, enjoy :)

All you need to introduce you in development of videogames for iOS with cocos2d

2014-02-27T13:31:00.000+01:00

Cocos2d programing guide (deprecated material, but basic)

The api of cocos2d

CGTextures a cool place to get textures

Blender-archi, great for bilboards

Game 3d projections info

Isometric tiles basics

Howto make isometric tiles for games using blender

Howto render transparent background with blender

Tiled tutorial

Cocos2d tutorial with tilemaps

Motion capture database from Carnegie Mellon University

Good luck!

Great Blender 3D tips

2014-01-04T02:15:00.000+01:00

Great collection of tips and advises from creativeBloq:

01. Don’t duplicate: instance instead
02. Save time with flat projection
03. Make use of Proportional Edit
04. Use Pose Libraries for blocking
05. Use Network Render to set up an ad hoc renderfarm
06. Use Damped Track for eye tracking
07. Use sculpting to fix errors in animation
08. Feed Compositor nodes to the VSE via scene strips
09. Put colour into shadows and global illumination
10. Use Only Insert Available when autokeying
11. Set up master files to grade large projects
12. Set up Fake users to manage remote collaboration
13. Use Rigify for rapid rigging

Source: CreativeBloq 13 blender tips pros

My first public appstore application released

2013-12-10T09:35:00.000+01:00

The app name is LocalCloud, indeed for share files between devices via http service

http://appstore.com/localcloud or
https://itunes.apple.com/us/app/localcloud/id769936753

Enjoy it! (rate and review are welcome!)

netkaos blog

2013-04-09T17:24:00.002+02:00

New blog by Ramón Arias, the netkaos blog, a general systems related blog and news!

See at http://netkaos.blogspot.com.es/ (castilian)

Chemical brothers Alive alone

2013-04-08T07:52:00.002+02:00

dd verbose

2013-01-12T15:00:00.000+01:00

Trying to pass large amount of data with dd is a little frustrating, ¿what are doing?...¿how many bytes are copied? this type of questions assaults my mind when need to use dd for something task.

In LinuxQuestions have the answer for this, using the (almost forgotten...) other singnals other than the sigKill or sigTerm, sigUSR1 haves the answer this time for dd.

$ kill -US1

eterm 0.9.6 compilation

2012-12-25T14:58:00.001+01:00

Little joke in configure step :)

[...]
checking for U_STACK_TRACE in -lcl... no
checking for Linux 2.1 or higher... yes
checking if we should enable name reporting escape sequences... yes
checking for life_signs in -lKenny... no
Oh my god, they killed Kenny! You bastards!
configure: creating ./config.status
config.status: creating Makefile
[...]

eterm vt102 terminal emulator link

(Castillian) Video: 10 strategies of media manipulation

2012-12-11T09:11:00.000+01:00

Incredible powers

2012-09-27T02:07:00.003+02:00

Steps to prevent burnout

2012-08-06T11:43:00.001+02:00

Good article about about burnout from lifehack:

http://www.lifehack.org/articles/lifestyle/9-ways-to-prevent-burnout.html

Virtualbox bluetooth and OSX

2012-07-26T13:02:00.000+02:00

I need to use my internal bluetooth dongle in my virtualbox, and the device is in use by the default OSX installation... a simple and stupid trouble... this is the solution:
(osx terminal, host computer)

# sudo kextunload -b com.apple.driver.BroadcomUSBBluetoothHCIController
#sudo kextunload -b com.apple.driver.AppleUSBBluetoothHCIController

The bluetooth icon in the toolbar showns broken (unable to found the device) all its fine.

Go to Virtualbox and add the device as USB in their settings panel

Enjoy with your bluetooth :)

To turn back the changes, stop the virtualmachine and use the terminal again:

# sudo kextload -b com.apple.driver.AppleUSBBluetoothHCIController

# sudo kextload -b com.apple.driver.BroadcomUSBBluetoothHCIController

Source: https://www.virtualbox.org/ticket/2372

Posted at BinaryCell

Congratulations, you have successfully installed your new Epson printer

2012-04-05T07:42:00.001+02:00

Source: Tonterías mas juntas

Posted at BinaryCell

Adblock now include cats!

2012-04-01T10:13:00.002+02:00

New release of adblock is great!

Posted at BinaryCell

In external devices, less encryption is better?

2012-03-01T14:23:00.004+01:00

When you use a weak encryption thinking in speed port, can you fall in the error, for better data performance, use faster encryption algorithm and simple keys seems be the correct way, I think this isn't shrinks to reality.

In all wide-used operative systems today, the data between devices is transferred using DMA as transfer scheme, this method implies don't disturb the CPU between consecutive reads and dump to a buffer memory, this isolate the cpu from unwanted "attention needed" signals to cpu from device, this isolated cpu is idle at 100% of time, free for normal system use without any handycap related to read or write to device.

When you encrypt a external device memory, using trueCrypt or other "portable" encryption solutions, the application have two task to do... "read/write from device" and "encrypt/decrypt the data", this two tasks seems a serial actions, but it isn't valid with DMA's tecnology (and a really old tecnology now) in serial reads, when you copy a file or something "big" (a serie of data) the process is in paral.lel with DMA, encryption of next cluster and write current cluster can be done at same time, and the speed limit is in two points, disk access time and encryption/decryption speed.

If you device speed is 10Mb per second, you don't need to use a basic AES encryption, you can use Serpent-Twofish-AES in serial, with 60Mb per second, 6x times more speed than device itself. This is time don't used by the encryption software, sleeping, waiting for DMA inquiry. Why not use this hardware situation to protect more your data with more strong encryption algorithm without speed-down your data access?

Posted at BinaryCell

(updated) llvm-gcc strange behavior

2012-02-05T15:10:00.003+01:00

Today compiling with XCode 4.2.1 ... i found this.. ~~the syntax is right.~~.. ¿have the switch instruction a limitation about this? YES

ARM and x86 architecture supports 'nop' instruction... ~~the use is safe for your code~~:

In Switch-Case statement, you can't declare variables inside, the 'cases' are translated to jump to memory address (some bytes after normally) in case of jump, the stack is not re-framed, like a simple "goto" basic instruction ("jmp" in asembler) is used to go to the correct memory address, when this instruction ends, the stack is returned "as is", with some bytes more of allocations in them, causing unexpected BAD_ACCESS & other low level errors.

Never allocate in switch case ;-) "learn from mistakes"

Source: "Why cant variables be declared in a switch statement" at stackoverflow.com

Posted at BinaryCell

Monkey Patch as hardening procedure

2012-01-10T22:31:00.001+01:00

Some times our php code acts as framework to serve small applications like a CMS or an administrative appliance launches mini applications to do maintain tasks.

If our application is wide open for developers community nothings guarantee the security and your product image can be get a fast burndown for your customers.

Monkey Patch is a simple solution for this ¿why not? Wikipedia explains the moneky patch so:

A monkey patch is a way to extend or modify the run-time code of dynamic languages without altering the original source code. This process has also been described as "duck punching".[1]
src: http://en.wikipedia.org/wiki/Monkey_patch

And this is a interesting way to hardening your external or plugin scripts:

Using namespaces to capture the basic functions:

# apt-get install build-essential php5-dev and pecl apd (advanced php debugger) [...]

A starter "jailed" (more precisely overdrived) environment of application in your framework:

"myPlugin" file acting as a unsecure code:

And finally the little security layer:

Posted at BinaryCell