Inserting text into a file but searching for the place to put it! Post: 302456659

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Top Forums Shell Programming and Scripting Inserting text into a file but searching for the place to put it! Post 302456659 by kurumi on Friday 24th of September 2010 09:13:52 PM

09-24-2010

Registered User

Code:

#!/usr/bin/env ruby 

require 'ipaddr'
def dec2ip(dec) return IPAddr.new(dec, Socket::AF_INET).to_s end
def ip2dec(ip) return IPAddr.new(ip).to_i end
file=ARGV[0]
insertline=ARGV[1]
data=File.read(file) # read the whole file
# store all ip address
sortedip=data.scan(/(\d+\.\d+\.\d+\.\d+)/).flatten.map {|x| ip2dec(x)}
# get the ip address to be inserted
insertip=ip2dec(insertline.scan(/\d+\.\d+\.\d+\.\d+/)[0])
sortedip<<insertip
sortedip.sort!
# get the ip before the one being inserted
beforeip=dec2ip(sortedip[sortedip.index(insertip)-1])
data.split("\n").each do |x|
  x="#{x}\n#{insertline}\n"  if x.match(beforeip)
  puts x
end

Code:

$ echo $insert
testmachine4 IN A 192.189.1.4

# ruby test.rb file "$insert"
;zone file for test001.btcuk
$TTL 2d
@      IN     SOA    testserver.servers009.btcuk.    root.servers009.btcuk (
                        2010092401            ;               serial number with no of editings
                        24h                       ;               refresh
                        5m                        ;               update entry
                        1w                        ;               expirary
                        2h )                      ;                minimum
                        NS        testserver.servers009.btcuk
testmachine1      IN         A          192.189.1.1
testmachine2      IN         A          192.189.1.2
testmachine3      IN         A          192.189.1.3
testmachine4      IN         A          192.189.1.4
wibble                IN         A          192.189.1.42
tesmachineend    IN         A           192.189.1.255


$ insert="testmachine20      IN         A          192.190.1.5"
$ ruby test.rb file "$insert"
;zone file for test001.btcuk
$TTL 2d
@      IN     SOA    testserver.servers009.btcuk.    root.servers009.btcuk (
                        2010092401            ;               serial number with no of editings
                        24h                       ;               refresh
                        5m                        ;               update entry
                        1w                        ;               expirary
                        2h )                      ;                minimum
                        NS        testserver.servers009.btcuk
testmachine1      IN         A          192.189.1.1
testmachine2      IN         A          192.189.1.2
testmachine3      IN         A          192.189.1.3
wibble                IN         A          192.189.1.42
tesmachineend    IN         A           192.189.1.255
testmachine20      IN         A          192.190.1.5

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LEARN ABOUT OSF1

look

look(1) 						      General Commands Manual							   look(1)

NAME

       look - Finds lines in a sorted list

SYNOPSIS

       look [-df] [-tcharacter] string [file]

       The look command prints all lines in a sorted file that begin with string.

OPTIONS

       Uses  dictionary  order; only letters, digits, tabs, and spaces are used in comparisons.  Searches without regard to case; treats uppercase
       and lowercase as equivalent.  Ignores character and characters following it in the search string.  If  you  specify  look  -tC  ABCDE,  the
       string  ABCDE  would  become  (in  effect)  AB, with CDE being ignored.	This option is primarily for shell scripts, in which more than one
       string is being processed.

DESCRIPTION

       If no file is specified, look searches in the system word list /usr/share/dict/words, with the options -df assumed by default.

       The look command uses binary search.

       The -d and -f options affect comparisons as in sort.

NOTES

       In order to use the -f option, you must first sort file with the sort -f command; otherwise, look displays only lowercase items.

       If you do not specify -f, but specify a file (such as /usr/share/dict/words) that has been sorted with sort -f, look may  not  produce  any
       output.

EXAMPLES

       To search a sorted file called sortfile for all lines that begin with the string as, enter: look as sortfile To search the system word list
       for all words beginning with smi, enter: look smi

	      This might result in: smile smirk smith smithereens Smithfield Smithson smithy smitten

FILES

       System word list.

SEE ALSO

       Commands:  grep(1), sort(1), spell(1)

																	   look(1)