Minute differences.

[btinder]

Hi all,

I have a process that wakes up, works for a little bit, then goes back to sleep for 5 minutes, wakes up, etc...

It outputs in a log file when its sleeping and when its working.

I'd like to have a script that will figure out the difference in minutes between when it went to sleep and the current time.

The problem I have is when its 12:00 and if it went to sleep at 11:57.

Are there commands and/or functions to handle differences in time? Thanks for any help...

 

[vgersh99]

convert your hh:mm into minutes and do your math in minutes

vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[btinder]

I did that, but I had issues when the current time is 00 and the previous time was 57. I was wondering if there's a better way to handle that situation.

 

[Salem]

> 12:00 and if it went to sleep at 11:57.
t1 = 12*60+0 = 720
t2 = 11*60+57 = 717
Therefore, difference in seconds is 720-717

--

 

[Ygor]

Convert times to minutes; subtract start time from end time; if negative then started before mignight so add 24 hours (1440 mins); print result....

#!usr/bin/ksh

start="23:45"
end="00:25"

((start_mins = $(expr substr "$start" 1 2)*60 + $(expr substr "$start" 4 2)))
((end_mins = $(expr substr "$end" 1 2)*60 + $(expr substr "$end" 4 2)))
((elapsed_mins = end_mins - start_mins))

if [[ "$elapsed_mins" -lt 0 ]]
then
   ((elapsed_mins += 1440))
fi

if [[ "$elapsed_mins" -gt 59 ]]
then
   print $((elapsed_mins / 60)) hours and $((elapsed_mins % 60)) minutes
else
   print $elapsed_mins minutes
fi