script – silveira neto

Cedilha no Ubuntu 16.04

Published by Silveira on 5 March, 2017

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Fiz esse script (cedilha.sh) pra fazer o c-cedilha (ç) funcionar no Ubuntu 16.04. Como é uma tarefa chata que eu já tive que fazer muitas vezes fica mais fácil pra mim ter um script pra fazer isso e pode ser que seja útil a outras pessoas. Infelizmente é uma solução que exige baixar e executar como root um script da internet. Eu recomendo que você leia o script e entenda o que está acontecendo antes de executá-lo. Esse script altera vários arquivos importantes e ele faz um backup (.bak) desses arquivos.

wget https://raw.githubusercontent.com/silveira/cedilha.sh/master/cedilha.sh
sudo bash cedilha.sh

Por favor, se o script funcionou pra você também, diga nos comentários. Se você não está usando Ubuntu 16.04 e quer testar o script ainda assim, edite o script e remova a verificação no inicio do programa.

read line by line in ShellScript

Published by Silveira on 3 December, 2014

#!/bin/sh
file="/tmp/myfile" 

while read line; do
  echo $line
done < "$file"

find a process running a deleted library

Published by Silveira on 9 June, 2014

sudo find /proc -maxdepth 2 -name maps -exec grep -HE ‘$deleted$’ {} \; | cut -d/ -f3 | sort -u | xargs –no-run-if-empty ps

Looking for libssl in specific:

sudo find /proc -maxdepth 2 -name maps -exec grep -HE ‘/libssl\.so.* $deleted$’ {} \; | cut -d/ -f3 | sort -u | xargs –no-run-if-empty ps

Killing all process using a deleted version of libssl:

sudo find /proc -maxdepth 2 -name maps -exec grep -HE ‘/libssl\.so.* $deleted$’ {} \;| cut -d/ -f3 | sort -u | xargs –no-run-if-empty sudo kill

Creating a lot of thumbnails with Shell script

Published by Silveira on 25 September, 2008

This script create a thumbnail with width 100 of each png file in the actual directory.

#!/bin/sh
for i in *.png
do
	echo "convert -thumbnail 100 $i $i"
	convert -thumbnail 100 $i $i
done

Java, showing script engines

Published by Silveira on 10 September, 2008

A simple code to show the script engines installed in your system.

As it uses the JSR-223 you need at least java 6.

import javax.script.ScriptEngineManager;
import javax.script.ScriptEngineFactory;
import java.util.List;
 
public class ListEngines {
    public static void main(String[] args){
	ScriptEngineManager manager = new ScriptEngineManager();
	List <ScriptEngineFactory> engines = manager.getEngineFactories();
	for(ScriptEngineFactory engine: engines){
		String name = engine.getEngineName();
		String lang = engine.getLanguageName();
		String ver = engine.getLanguageVersion();
		System.out.println(name+" "+lang+" "+ver);
	}
    }
}

$ java -version
java version “1.6.0_0”
OpenJDK Runtime Environment (build 1.6.0_0-b11)
OpenJDK Client VM (build 1.6.0_0-b11, mixed mode, sharing)
$ javac ListEngines.java
$ java ListEngines
Mozilla Rhino ECMAScript 1.6

For now I just have Rhino ECMAScript (JavaScript) engine accessible that comes with Java 6. I’m trying now to call Jython and JRuby code.

Script to Installing JavaFX Compiler

Published by Silveira on 16 July, 2008

Right in this moment you can choose between three options to develop JavaFX:

Use the old version of JavaFX, interpreted. Not recommended.
Use the JavaFX Milestone 3. Little bit old but more stable.
Use the JavaFX Continuous Build. Is more dangerous but give us fresh builds. :)

I did this little script to download the last version of JavaFX continuos build and install it for you.

#!/bin/sh
envfile=$HOME/.bash_profile
 
#download and unpatch the last build of JavaFx
mkdir jfx
cd jfx
wget http://openjfx.java.sun.com/hudson/job/openjfx-compiler/lastBuild/artifact/openjfx-compiler/dist//*zip*/dist.zip
unzip dist.zip
rm dist.zip
 
#set files at bin folder as executable
chmod +x dist/bin/*
 
#add those executables to the path
echo "PATH=\$PATH:`pwd`/dist/bin" >> $envfile

Save this script as install_jfx.sh and execute it. Probably you want to execute it at you home directory. If you want to install JavaFX to root change envfile for /root/.bash_profile, if you want to install to all users change for /etc/profile. I tested this script successfully on my Ubuntu 8.04.

After that open a new terminal and try to see if javafx, javafxc and javafxdoc are available. You can test your enviroment with this simple program.

import javafx.ui.*;
import java.lang.*;
 
Frame {
  visible: true
  content: FlowPanel {
  content: Button {
      var n = 0
      text: bind Integer.toString(n)
      action: function() {
        n++;
      }
    }
  }
}

Save it as Counter.fx, compile with javafxc Counter.fx and so execute it with javafx Counter.fx.

To know more, take a look into the preliminary JavaFX API or in the article Using JavaFX GUI Toolkit.

Tag: script