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Full Discussion: Comparing variables in awk
Top Forums Shell Programming and Scripting Comparing variables in awk Post 302338711 by Shinsuio on Tuesday 28th of July 2009 05:19:05 PM
Old 07-28-2009
Comparing variables in awk

I'm writing a shellscript that monitors the price of a watch. If the prices changes, it should email me. The body of the email will show the old price and the new price. However when I compare the two awk variables(oldprice and newprice) it always says they're not the same. The shellscript goes out and retrieves the web page source code, searches it for the price, once found it stores that price in the variable newprice. I then attempt to compare it to the old price, which comes from a file and is stored in the variable oldprice, but have problems there. I don't know if awk stores it as a string or as a float variable. I am also a little unsure about how to go about mailing myself when they are not the same. I'll appreciate any help you can give me.Smilie

Code:
#!/bin/sh

wget -qO- http://cs.actx.edu/~craddock/unix2/lab11 | awk -v oldprice=`cat pricefile` '
    /<b class="price">/ {
    getline
    newprice = $0

    if (oldprice ~ newprice) {
        print "The price is the same"
    }
    else{
        print "The price is not the same"
        system ("mail -s"The price has changed" username")
        print newprice > "pricefile"
    }
}'

 
Test Your Knowledge in Computers #900
Difficulty: Medium
KornShell (ksh) is a Unix shell which was developed by David Korn at UC Berkeley.
True or False?

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Finance::Quote::TSP(3pm)				User Contributed Perl Documentation				  Finance::Quote::TSP(3pm)

NAME
Finance::Quote::TSP - Obtain fund prices for US Federal Government Thrift Savings Plan SYNOPSIS
use Finance::Quote; $q = Finance::Quote->new; %info = Finance::Quote->fetch("tsp","c"); #get value of C "Common Stock Index Investment" Fund DESCRIPTION
This module fetches fund information from the "Thrift Savings Plan" http://www.tsp.gov using its fund prices page https://www.tsp.gov/investmentfunds/shareprice/sharePriceHistory.shtml The quote symbols are C common stock fund F fixed income fund G government securities fund I international stock fund S small cap stock fund L2020 lifecycle fund year 2020 L2030 lifecycle fund year 2030 L2040 lifecycle fund year 2040 L2050 lifecycle fund year 2050 LINCOME lifecycle income fund LABELS RETURNED
The following labels may be returned by Finance::Quote::TSP : name eg. "Common Stock Index Investment Fund" date latest date, eg. "21/02/10" isodate latest date, eg. "2010-02-21" last latest price, eg. "16.1053" close previous day's price nav same as "last" currency "USD" method "tsp" "nav" is the same as "last" since the funds are quoted at their net asset value. SEE ALSO
Thrift Savings Plan, http://www.tsp.gov perl v5.14.2 2014-03-03 Finance::Quote::TSP(3pm)

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