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Top Forums Shell Programming and Scripting Military type format date/time conversion Post 302571916 by Corona688 on Tuesday 8th of November 2011 03:00:05 PM
Old 11-08-2011
you hardly need to match the entire line, especially when the data comes in a convenient tabular format. awk is made for this.

Code:
$ cat 24hr.awk

BEGIN { FS=","; OFS="," }
{
        split($1, A, " ");        split(A[4], B, ":");

        HR=B[1];
        MIN=substr(B[2], 0, 2);
        AM=substr(B[2], 3);

        if(AM == "PM")  HR += 12;

        $1=sprintf("%s %s %s %02d:%02d", A[1], A[2], A[3], HR, MIN);
} 1

$ awk -f 24hr.awk < data

Nov 2 2011 12:01,52893,420,1,4,0,52834,4,1208,67664942,603459924403.0,1,150054,1208,3
Nov 2 2011 17:16,52127,420,1,4,0,52122,4,1429,55943831,603459924406.0,1,150054,1429,3

$

 

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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). Free Software Foundation Nov 3 1999 IGAWK(1)
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