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Need help in Inix script for finding duration

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# 1  
Old 02-13-2017
Need help in Inix script for finding duration
I have a file with time in it. I need to find the duration between the timestamp by subtracting second row from third row and so on. and wherever it is more than 30 minutes it should display start and end time which have been subtracted

file :
Code:
00:44:11
00:44:11
00:44:13
00:44:13
00:46:51
00:46:51
02:46:58 
03:47:10
08:47:10
08:47:11

so as 7th row minus 6th row time 2:46:58 - 00;46:51 is more than 30 minute so these time stamps should get displayed.
Moderator's Comments:
Mod Comment Please use CODE tags when displaying sample input, sample output, and code segments, as required by forum rules.
Last edited by Don Cragun; 02-13-2017 at 03:42 AM.. Reason: Add CODE and ICODE tags.
# 2  
Old 02-13-2017
Is this a homework assignment? Homework and coursework questions can only be posted in the Homework & Coursework forum under special homework rules.

If you did not post homework, please explain the company you work for and the nature of the problem you are working on. And, tell us what operating system and shell you're using. Also, please show us what you have tried to solve this problem on your own.

If you did post homework in the main forums, please review the guidelines for posting homework and repost.
# 3  
Old 02-14-2017
In addition to what Don said: Please explain what is Inix.
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