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Full Discussion: Date manipulation using awk
Top Forums Shell Programming and Scripting Date manipulation using awk Post 302860135 by victory101 on Friday 4th of October 2013 04:04:38 PM
Old 10-04-2013
Thanks Corona for the reply.

As I was having the date in $4, I changed as follows.

Code:
  gawk -F, -v OFS=, '{ split(/-/, A, $4); T=systime()-mktime(sprintf("%04d %02d %02d 00 00 00", A[1], A[2], A[3]));
        T/=(60*60*24);
        $4=T;        
 } 1' inputfile

$ cat inputfile
John,Miami,,2013-10-03

$ date
Fri Oct  4 23:17:36 AST 2013

$ bash -x scr.sh
+ gawk -F, -v OFS=, '{ split(/-/, A, $4); T=systime()-mktime(sprintf("%04d %02d %02d 00 00 00", A[1], A[2], A[3]));
        T/=(60*60*24);
        $4=T;        
 } 1' inputfile
John,Miami,,735177

Kindly help, as it is not giving the expected result.

I changed to gawk, as I'm running on Linux.

Last edited by Corona688; 10-04-2013 at 06:43 PM..
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)
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