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Full Discussion: cat files
Top Forums UNIX for Dummies Questions & Answers cat files Post 302167851 by sandeep78 on Friday 15th of February 2008 04:14:28 PM
Old 02-15-2008
Thank you, I tried your script.
It is working close to what I need.
I tweaked it a bit to meet my exact requirements.

Thanks again
-Sandeep


Quote:
Originally Posted by sb008
Very basic script, no error checking etc etc ect.

Script takes 1 parameter, number of output files needed,

Script assumes all files which should be concatenated start with input_

Script assumes all files are in the current directory.


Should be easy to change the script into something more luxerary, it just presents a concept.

Code:
#!/usr/bin/bash
NUMOUT=${1}

NUMFILES=`ls input* | wc -l`

((IN_PER_OUT=${NUMFILES} / ${NUMOUT} + 1))

CURRENT=1
OUT=1
ls input* | while read FILE
do
  if [ ${CURRENT} -eq 1 ]
  then
    cat ${FILE} > output_${OUT}.txt
  else
    cat ${FILE} >> output_${OUT}.txt
  fi

  ((CURRENT=${CURRENT}+1))
  if [ ${CURRENT} -gt ${IN_PER_OUT} ]
  then
    CURRENT=1
    ((OUT=${OUT}+1))
  fi
done

 

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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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