February 2016 – Jason R. Ralph

I just installed the crayon code highlight plugin from the link below, man you got to give credit where credit is due. This plugin was simple to install on my site and it has endless code highlighting capabilities.
Crayon Highlight
OMG: This is some pretty code highlighting if I must say so myself. Have a look:

PYTHON:

[jralph@jr-sandbox python_scripts]$ cat py_function_learning.py
#!/usr/bin/python

# playing with procedures returning values

def add_procedure(a,b):
    foo = a + b

def add_function(a,b):
    return a + b

print("Three plus Five is: %d" % add_function(3,5))

[jralph@jr-sandbox python_scripts]$ cat py_function_learning.py

#!/usr/bin/python

# playing with procedures returning values

def add_procedure(a,b):

foo = a + b

def add_function(a,b):

return a + b

print("Three plus Five is: %d" % add_function(3,5))

PHP:

<?php
echo preg_replace_callback('~-([a-z])~', function ($match) {
    return strtoupper($match[1]);
}, 'hello-world');
// outputs helloWorld
?>

<?php

echo preg_replace_callback('~-([a-z])~', function ($match) {

return strtoupper($match[1]);

}, 'hello-world');

// outputs helloWorld

C++:

#include <iostream>
using namespace std;

void HelloWorld()
{
  cout << "Hello, World" << endl;
}

int main()
{
  HelloWorld();
  return 0;
}

#include <iostream>

using namespace std;

void HelloWorld()

{

cout << "Hello, World" << endl;

}

int main()

{

HelloWorld();

return 0;

}

BASH:

#!/bin/bash
# declare STRING variable
STRING="Hello World"
#print variable on a screen
echo $STRING

#!/bin/bash

# declare STRING variable

STRING="Hello World"

#print variable on a screen

echo $STRING

PERL:

  #!/usr/bin/perl
  #
  # The traditional first program.

  # Strict and warnings are recommended.
  use strict;
  use warnings;

  # Print a message.
  print "Hello, World!\n";

#!/usr/bin/perl

# The traditional first program.

# Strict and warnings are recommended.

use strict;

use warnings;

# Print a message.

print "Hello, World!\n";

JAVA:

public class HelloWorld {

    public static void main(String[] args) {
        // Prints "Hello, World" to the terminal window.
        System.out.println("Hello, World");
    }

}

public class HelloWorld {

public static void main(String[] args) {

// Prints "Hello, World" to the terminal window.

System.out.println("Hello, World");

}

Hello all,

TL;DR – I wrote a C program to use as clear.exe on cygwin, I know about CTRL-L but I wanted a binary for scripts, and I am used to typing clear at a terminal

I was recently enforced to use Windows as my daily computer at work for all types of compliance PCI reasons, reasons that I do not wish to dive into. However I am now on Windows, I spend most of my day in a BASH shell on a remote system, so it’s not that bad. However traversing around Windows with CMD or PS sucked. I was introduced to cygwin and I was really impressed, I was able to use a ton of tools that I was already familiar with on the Linux CLI. Native SSH,SCP were huge for me at this time, also the ability to customize the colors with the TTY settings was awesome.

One issue I ran into was I liked to use the clear command in my scripts and from the CLI when I want a fresh terminal. Well, I figured I could just re launch the cygwin installer and search for clear.exe and install it. This was not the case, unfortunately I was instructed to install ncurses and the associated libraries. I followed these recommendations and never got clear.exe to work.

So I did what any computer scientist would do, research how to write a C program on this and compile it and copy it to my $PATH and wouldn’t you know it works!!.

So Here it is in all it’s glory. clear.exe for Windows and CYGWIN:

### Clear no workie ###

jralph@JRALPH2-NB ~
$ clear
-bash: clear: command not found

jralph@JRALPH2-NB ~

$ clear

-bash: clear: command not found

Ok so we can see the clear program was not working in the above example. So I wrote the following lines of C code below and compiled them.

jralph@JRALPH2-NB ~
$ cat clear.c
#include <stdio.h>
main()
{
    printf("\033c");
}

jralph@JRALPH2-NB ~

$ cat clear.c

#include <stdio.h>

main()

{

printf("\033c");

}

OK, cool, now you will need to get GCC on your Windows machine from the CYGWIN installer, so just re run the installer and search GCC, you can install it from there like so.

View post on imgur.com

Ok now for the awesome stuff, it’s time to compile this with GCC and create a new clear.exe binary for Windows and CYGWIN.

jralph@JRALPH2-NB ~
$ gcc clear.c -o clear.exe

1 2	jralph@JRALPH2-NB ~ $ gcc clear.c -o clear.exe

jralph@JRALPH2-NB ~
$ ./clear.exe

1 2	jralph@JRALPH2-NB ~ $ ./clear.exe

Now that we see we can use the new executable to clear out cygwin shell, let’s copy it somewhere so we can just type “clear” to get what we want.

jralph@JRALPH2-NB ~
$ cp clear.exe /usr/bin/

1 2	jralph@JRALPH2-NB ~ $ cp clear.exe /usr/bin/

And there you have it, have fun!!!

Jason

Jason R. Ralph

Linux All Day Everyday

Month: February 2016

Code Highlighting Test

CYGWIN – clear.exe from scratch C Program