Shell Programming and Scripting

From newbie@gmail.com Thu May 18 10:17:58 2006
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Date: Thu, 18 May 2006 01:17:55 -0700
From: "ppppp" <newbie@gmail.com>
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Subject: Noooo
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Nemam co napssaaat.


sssss

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<div>Nemam co napssaaat.</div>
<div>&nbsp;</div>
<div>&nbsp;</div>
<div>sssss</div>

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BEGIN {
  # make 'records' to be separated by blank/empty lines
  RS=FS=""

  # create a pattern where something starts either one of listed strings
  headers="(^From )|(^Message-ID:)|(^Date:)|(^From:)|(^To:)|(^Subject:)"
}

# If a record starts with 'From ' ...
/^From / {

   # print the record number
   printf("\n\n=== THIS is MAIL MESSAGE #%d ===\n\n", ++msg)

   # iterate through the fields of a given 'record' - every field is a LINE, 
   # because records are 'blank line' separated sequesnce of lines
   for(i=1; i<=NF; i++) {

     # if a record field (a line) matches a pattern 'headers' - print that field
     if ( $i ~ headers) print $i
   }
}

# print any OTHER 'record' - this is a shorthand for 'print $0'
1