Subtracting time with awk - BASH/Debian GNU Linux Post: 302385010

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Top Forums Shell Programming and Scripting Subtracting time with awk - BASH/Debian GNU Linux Post 302385010 by rickenbacherus on Wednesday 6th of January 2010 11:53:41 PM

01-07-2010

Registered User

Starting with ghostdog74's example (which of course works perfectly) I have thus far been unable to make this work to subtract chapter start/end times. Perhaps someone can spot the reason(s)?

Code:

#!/bin/bash
awk 'BEGIN{
{
 for(i=1;i<=NF;i++){
    m=split($i,t,":")
    n=split($(i+1),w,":")
    chap = (t[1]*3600) + (t[2]*60) + t[3]
    chap_next = (w[1]*3600) + (w[2]*60) + w[3]
    duration = (chap_next - chap)
    print $duration
    }
 }
}'ChapterStart

Code:

$ cat ChapterStart 
00:00:00 00:01:03 00:05:57 00:08:27 00:11:58 00:14:50 00:20:19 00:25:06 00:33:17 00:38:21 00:42:30 00:46:11 00:51:33 01:00:04 01:00:56 01:04:15 01:09:13 01:16:51 01:20:03 01:27:58

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igawk

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)