<?php
/*
 * Filename: tricolor.php
 * Dependencies: GD Library mostly precombile with php 4.0+
 * Author: Adhil Azeez NV
 * Description: Generates Indian National Flag Image
 */

//Create a resource identifier for the image res in ration 3:2
$flag = imagecreate(1350, 900); 
if (!$flag) {
    die("Some error occured");
}
//Color identifiers definitions
$white = imagecolorallocate($flag, 255, 255, 255);
$saffron = imagecolorallocate($flag, 255, 153, 51);
$green = imagecolorallocate($flag, 18, 136, 7);
$blue = imagecolorallocate($flag, 00, 0, 137);

//Draw the tricolor sections.The white portion is no need to be specified since
//the background color is white.
imagefilledrectangle($flag, 0, 0, 1350, 300, $saffron);
imagefilledrectangle($flag, 0, 600, 1350, 900, $green);

//Draw the Ashoka Chakra
//The Circle can be created with imageellipse itself after setting the thickness.
//But unfortunetly due to a bug in GD library(reported more than 5 years ago :()
//the thickness is being ignored.
imagefilledellipse($flag, 675, 450, 240, 240, $blue);
imagefilledellipse($flag, 675, 450, 210, 210, $white);

//Draw the center small circle
imagefilledellipse($flag, 675, 450, 42, 42, $blue);

for ($angle = 0; $angle <= 360; $angle = $angle + 15) {

//Draw 24 small circles in the Ashoka Chakra at the border of the circle adjacent
// to 24-spoke
    $x = 675 + 105 * cos(deg2rad($angle+7.5));
    $y = 450 + 105 * sin(deg2rad($angle+7.5));
    imagefilledellipse($flag, $x, $y, 10.5, 10.5, $blue);

//Draw the 24 spooks
    $x1 = 675 + 8 * cos(deg2rad($angle));
    $y1 = 450 + 8 * sin(deg2rad($angle));
    $x2 = $x1 + 40 * cos(deg2rad($angle - 5));
    $y2 = $y1 + 40 * sin(deg2rad($angle - 5));
    $x3 = 675 + 105 * cos(deg2rad($angle));
    $y3 = 450 + 105 * sin(deg2rad($angle));
    $x4 = $x1 + 40 * cos(deg2rad($angle + 5));
    $y4 = $y1 + 40 * sin(deg2rad($angle + 5));
    imagefilledpolygon($flag, array($x1, $y1, $x2, $y2, $x3, $y3,$x4,$y4), 4, $blue);
}
//if the script being invocked from CLI and has a filename arguments then write
//the out put to the file else print to the outputstream.
if (isset($_SERVER['argv'][1])) {
    if(imagejpeg($flag, $_SERVER['argv'][1] . '.jpg', 100))
    	echo "National Flag saved to ".$_SERVER['argv'][1] . '.jpg';
    else
    	echo "Some error occured";
} else {
    header("Content-type: image/jpeg");
    imagejpeg($flag, null, 100);
}
imagedestroy($flag);
?>

Design

The script makes use of php GD library. It outputs the image to current
output stream or save to a file.

If php GD library have anti aliasing support then we can enable that for much
better render.Currently anti aliasing is not enabled in the script.

The output is in JPEG format but it can be changed to other format if necessary
with a few modification in the script.

Dependencies
PHP needs GD Library support. Most of the php distribution compiled with it.

Usage
php flag.php filename

Filename argument is optional. If not present the script will output to the
current output stream

for example:
php flag.php | display
will open the image in ImageMagick picture viewer

The configuration is done in Arch Linux. For automatic wakeup it needs a BIOS which supports RTC alarm. Most of them manufactured after 2000 supports this feature.

1) Check if your BIOS supports automatic wakeup

Execute the command below as root.

# grep rtc /var/log/messages.log
rtc_cmos 00:03: RTC can wake from S4
rtc0: alarms up to one month

2) Enable automatic wakeup in BIOS

Go to your BIOS setup, Under Power Management search for something like “Wake by RTC Alarm” or “Resume by RTC alarm” or “RTC resume”.Then enable it.

3) Set the hardware clock time standard as UTC

Edit the /etc/rc.conf file as root and set the HARDWARECLOCK variable to UTC

[ragsagar@h4ckb0x ~]$ grep ^HARDWARECLOCK /etc/rc.conf
HARDWARECLOCK="UTC"

Make sure that your timezone is set correctly in /etc/rc.conf
More help : https://wiki.archlinux.org/index.php/Time

4) Set the alarm time

Execute the following commands as root

# echo 0 > /sys/class/rtc/rtc0/wakealarm
# echo `date '+%s' -d '+ 5 minutes'` > /sys/class/rtc/rtc0/wakealarm

This will set the the alarm time as 5 minutes into the future.

Now run

$ cat /sys/class/rtc/rtc0/wakealarm

If the output of above command is something like “1313383930″, the alarm is set. It is epoch time. If it doesn’t yield any result make sure that the HARDWARECLOCK variable is set to UTC and reboot and try again to set the alarm time.

Now run

$ cat /proc/driver/rtc

Go through rtc_time, alrm_time and alrm_date and check if they are correct(will be in UTC).Turn off the system and leave the power on. Check if the system is booting automatically after five mintues.

5) Setting the alarm to a particular time and date.

To set the alarm to woke up the system at 16th Aug 2:05am, Run the following as root

# echo 0 > /sys/class/rtc/rtc0/wakealarm
# date --date "Aug 16 , 2011 02:05:00" +%s > /sys/class/rtc/rtc0/wakealarm

You can convert the epoch time to readable format and check the alarm time is correct.

[root@h4ckb0x ragsagar]# cat /sys/class/rtc/rtc0/wakealarm
1313440500
[root@h4ckb0x ragsagar]# date -d @1313440500 +%F" "%T
2011-08-16 02:05:00

Note : The mythtv wiki about acpi wakeup says that setting the hardware clock after setting alarm will disable the alarm while most of the linux distribution sets hardware clock during shutdown. They suggest to disable hardware clock adjusting during shutdown. To do that in Archlinux set the HARDWARECLOCK=”" in /etc/rc.conf . But in my arch system the alarm was not working when i set HARDWARECLOCK=”" whereas it worked when i gave HARDWARECLOCK=”UTC”. So if the wake up alarm is not working do try after changing the value of this variable.

To start downloading when the system boots up, i added a cronjob to restart the router at 2:15 and 7:45 (to account the download in happy hours). Also added “transmission-gtk” to the gnome-session-properties. So that transmission will be launched on startup and downloading will be started.

Reference :

http://www.mythtv.org/wiki/ACPI_Wakeup

https://wiki.archlinux.org/index.php/Time

#!/usr/bin/env expect

set username admin
set pass admin
set host 192.168.1.1

spawn telnet ${host}

expect -re "Login:"
send "${username}\r"

expect "Password:"
send "${pass}\r"

expect -re "successful"
send "console enable\r"
send "restart\r"
expect eof 

import sys

dictfile = "/usr/share/dict/cracklib-small"

def get_words(text):
	""" Return a list of dict words """
	return text.split()
	

def get_possible_words(words,jword):
	""" Return a list of possible solutions """
	possible_words = []
	jword_length = len(jword)
	for word in words:
		jumbled_word = jword
		if len(word) == jword_length:
			letters = list(word)
			for letter in letters:
				if jumbled_word.find(letter) != -1:
					jumbled_word = jumbled_word.replace(letter,'',1)
			if not jumbled_word:
				possible_words.append(word)
	return possible_words		
			
				
if __name__ == '__main__':
	words = get_words(file(dictfile).read())
	if len(sys.argv) != 2:
		print "python %s <jumbled word>" % sys.argv[0]
		sys.exit()
	jumbled_word = sys.argv[1]
	words = get_possible_words(words,jumbled_word)
	print "possible words :"
	print '\n'.join(words)

Don’t forget to change the ‘dictfile’ to the wordslist file you have in your system.

Here is the screenshot of script output.

For those who don’t know about this event : http://codejam.mobme.in/

Sample Question :

Write a program that ranks Hollywood actors based on the number of their appearances in a list of top 100 movies. There are a number of top movie lists on the Internet and it’s up to you to choose one. We’d prefer you choose one that has an open API.

Solution in Python :

#!/usr/bin/env python

__author__ = "Rag Sagar.V"
__email__ = '@'.join(['ragsagar','.'.join([_ for _ in ['gmail','com']])])


from twisted.internet import reactor, threads
import re,imdb,itertools


actors_rating = {} #actors_rating['actor name'] = rank
rank = 0
count = 1
current_rank = 0
concurrent = 5
finished = itertools.count(1)
reactor.suggestThreadPoolSize(concurrent)


try:
	imdb_access = imdb.IMDb()
except imdb.IMDbError, err:
	print err
		
top_100 = imdb_access.get_top250_movies()[:100]


def populate_actors(mid):
	movie = imdb_access.get_movie(int(mid))
	#print movie
	for i in (0,1):
		actor_name =  movie['cast'][i]['name']
		if actors_rating.has_key(actor_name):
			actors_rating[actor_name] = actors_rating[actor_name] + 1
		else:
			actors_rating[actor_name] = 1
	if finished.next()==added:
		reactor.stop()
	
added = 0
for movie in top_100:
	added += 1	
	req = threads.deferToThread(populate_actors, movie.getID())

try:
	reactor.run()
except KeyboardInterrupt:
	reactor.stop()	

   
for actor in sorted(actors_rating, key=actors_rating.get, reverse=True):
	previous_rank = current_rank
	current_rank = actors_rating[actor]
	if previous_rank !=  current_rank :
		rank += count
		count = 1
	else:
		count += 1	
	print rank,actor   
    
    

Dependency :
imdbpy

#!/usr/bin/python
import time

current_hour = time.strptime(time.ctime(time.time())).tm_hour

if current_hour < 12 :
	print "Good Morning!"
elif current_hour == 12 :
	print "Good Noon!"
elif current_hour > 12 and current_hour < 18 :
	print "Good AfterNoon!"
elif current_hour >= 18 :
	print "Good Evening!"

Now if you want to display it when you open the console add the following line to your ~/.bashrc file.

python /path/to/the/script.py

Happy Hacking!

#!/usr/bin/python
#-*- coding: utf-8 -*-
# http://ragsagar.wordpress.com

from HTMLParser import HTMLParser
import urllib2,sys


class Parser(HTMLParser):
	
	def __init__(self):
		self.in_header = False
		self.in_definition = False
		HTMLParser.__init__(self)
	
	def handle_starttag(self, tag, attrs):
		if tag == 'li':
			self.in_header = True
		if tag == 'a' and self.in_header :
			self.in_definition = True
	
	def handle_endtag(self, tag):
	    	if tag == 'li':
			self.in_header = False
		if tag == 'a' :
			self.in_defintion = False
			
	def handle_data(self, data):
		if self.in_definition:
			print data 
			exit(0)
					


try :
	search_item = sys.argv[1]
except IndexError:
	print " syntax : %s <definiton> " % sys.argv[0]
	exit(1)
search_link = "http://ml.wiktionary.org/w/index.php?title=%s&printable=yes" % (urllib2.quote(search_item.encode('utf-8')))


request = urllib2.Request(search_link)
request.add_header('User-agent', 'Mozilla/5.0 (hb)')
try :
	response = urllib2.urlopen(request)
except urllib2.HTTPError :
	print "No definition found "
except urllib2.URLError :
	print "Unable to connect to internet "
else :
	parser = Parser()
	data = response.read()
	parser.feed(data)
			

Output in my terminal

malayalam meaning