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Top Forums UNIX for Advanced & Expert Users Using awk to read a file and process Post 302871515 by ziggy6 on Wednesday 6th of November 2013 10:31:56 AM
Old 11-06-2013
Using awk to read a file and process

I am fairly green using awk so I don't have anything started but what I am trying to do is: I have a file called "contacts" and in the file are 3 fields separate by ;. I want to read each line and send an email script. I have the email function working but just need to know how to setup awk to read each line and process. This is the sample of the contact file, it will grow so it will eventually have more than 3 lines Smilie
Code:
8535;abccompany@yahoo.com;Dan
4200;123bakerbest@gmail.com;Tom
4300;daddy@godaddy.com;Jerry

Here is what I know how to do but not sure how to do a do while loop or for next loop with awk
Code:
counter=`wc -l "contacts" |awk '{print $1'}`
echo $counter
awk -F';' '{ print $1 $2 $3 }' contacts
echo "test"

Results give me the count of how many lines using wc with awk

Code:
3
8535abccompany@yahoo.comDan
4200123bakerbest@gmail.comTom
4300daddy@godaddy.comJerry
test

 

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English(3pm)						 Perl Programmers Reference Guide					      English(3pm)

NAME
English - use nice English (or awk) names for ugly punctuation variables SYNOPSIS
use English; use English qw( -no_match_vars ) ; # Avoids regex performance penalty # in perl 5.16 and earlier ... if ($ERRNO =~ /denied/) { ... } DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get triggered just by accessing them (like $0) will still be affected. For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module. See perlvar for a complete list of these. PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if your code is to run on perl 5.18 or earlier. This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing use English qw( -no_match_vars ) ; . It is especially important to do this in modules to avoid penalizing all applications which use them. perl v5.18.2 2014-01-06 English(3pm)
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