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Top Forums Shell Programming and Scripting Extract between two Exact matched strings. Post 302978662 by mohtashims on Tuesday 2nd of August 2016 10:13:31 AM
Old 08-02-2016
Hammer & Screwdriver Extract between two Exact matched strings.

more data.txt

Quote:
Start_of_DISK_info:/u
Disk: /u
CURRENT=81
End_of_DISK_info:/u

Start_of_DISK_info:/u/tmp
Disk: /u/tmp
CURRENT=1
End_of_DISK_info:/u/tmp
....
...
i need this exacted from data.txt

Quote:
Start_of_DISK_info:/u
Disk: /u
CURRENT=81
End_of_DISK_info:/u
This is the command i tried

Code:
sed -n "/Start_of_DISK_info:\/u/,/End_of_DISK_info:\/u/p"  data.txt

But, unfortunately it does not do an exact match. Instead, it prints text between both these strings /u & /u/tmp like below.

Quote:
Start_of_DISK_info:/u
Disk: /u
CURRENT=81
End_of_DISK_info:/u

Start_of_DISK_info:/u/tmp
Disk: /u/tmp
CURRENT=1
End_of_DISK_info:/u/tmp
i need this exacted from data.txt

Quote:
Start_of_DISK_info:/u
Disk: /u
CURRENT=81
End_of_DISK_info:/u
Please suggest how can i get exact match.

Last edited by mohtashims; 08-02-2016 at 11:21 AM..
 

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CURRENT(3)								 1								CURRENT(3)

current - Return the current element in an array

SYNOPSIS
mixed current (array &$array) DESCRIPTION
Every array has an internal pointer to its "current" element, which is initialized to the first element inserted into the array. PARAMETERS
o $array - The array. RETURN VALUES
The current(3) function simply returns the value of the array element that's currently being pointed to by the internal pointer. It does not move the pointer in any way. If the internal pointer points beyond the end of the elements list or the array is empty, current(3) returns FALSE. Warning This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function. EXAMPLES
Example #1 Example use of current(3) and friends <?php $transport = array('foot', 'bike', 'car', 'plane'); $mode = current($transport); // $mode = 'foot'; $mode = next($transport); // $mode = 'bike'; $mode = current($transport); // $mode = 'bike'; $mode = prev($transport); // $mode = 'foot'; $mode = end($transport); // $mode = 'plane'; $mode = current($transport); // $mode = 'plane'; $arr = array(); var_dump(current($arr)); // bool(false) $arr = array(array()); var_dump(current($arr)); // array(0) { } ?> NOTES
Note You won't be able to distinguish the end of an array from a boolean FALSE element. To properly traverse an array which may contain FALSE elements, see the each(3) function. SEE ALSO
end(3), key(3), each(3), prev(3), reset(3), next(3). PHP Documentation Group CURRENT(3)
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