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Full Discussion: add or modify if existent
Top Forums Shell Programming and Scripting add or modify if existent Post 302112347 by anbu23 on Tuesday 27th of March 2007 12:56:52 PM
Old 03-27-2007
Code:
awk -F"[ =]" '
BEGIN { arr["shmsys:shminfo_shmmax"]="set shmsys:shminfo_shmmax= 2000000000";
arr["shmseg:shminfo_shmseg"]="set shmseg:shminfo_shmseg=200"; }
{ if( arr[$2] !~ /^ *$/ ) { print arr[$2]; delete arr[$2]; }
  else print }
END {
for( key in arr ) {
	if( arr[key] !~ /^ *$/ ) { print arr[key] }
} } ' /etc/system > tmp
mv tmp /etc/system

 

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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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