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Script for replacing text in a file based on list

 
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Old 09-29-2010
Question Script for replacing text in a file based on list
Hi All,
I am fairly new to the world of Unix, and I am looking for a way to replace a line of text in a file with a delimited array of values.
I have an aliases file that is currently in use on our mail server that we are migrating off of. Until the migration is complete, the server must stay up. I need to migrate approximately 50 people per day. In order to do this, I must replace lines in my aliases file without disturbing the distribution lists.
For example, I have a list of users as such:
user1: id1
user2: id2
user3: id3
user4: user2
distributionlist: user1,user3
I want to search that file based on the id# and comment that line out. I then want to insert a line directly underneath it as such:
#user1: id1
user1: alias1@domain.com
The domain is not static, and that is why I would need to reference an array (tab delimited or such).
I would prefer to create a backup of the original file with a rather than output to a new filename as I think this may be easier than changing the script that puts the file into production.
I know this probably isn't the best explanation and I may be missing some info. Thanks in advance!
 
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LEARN ABOUT PHP

array_count_values

ARRAY_COUNT_VALUES(3)							 1						     ARRAY_COUNT_VALUES(3)

array_count_values - Counts all the values of an array

SYNOPSIS

       array array_count_values (array	$array)

DESCRIPTION

       array_count_values(3) returns an array using the values of $array as keys and their frequency in $array as values.

PARAMETERS

	      o $array
		- The array of values to count

RETURN VALUES

	Returns an associative array of values from $array as keys and their count as value.

ERRORS
/EXCEPTIONS
	Throws E_WARNING for every element which is not string or integer.

EXAMPLES

       Example #1

	      array_count_values(3) example

	      <?php
	      $array = array(1, "hello", 1, "world", "hello");
	      print_r(array_count_values($array));
	      ?>

	      The above example will output:

	      Array
	      (
		  [1] => 2
		  [hello] => 2
		  [world] => 1
	      )

SEE ALSO

       count(3), array_unique(3), array_values(3), count_chars(3).

PHP Documentation Group 												     ARRAY_COUNT_VALUES(3)