Subtracting Times 1

[rik1551]

Hi everyone,

I need to be able to write into a ksh script, a function that can look at 2 24 hour time variables and work out the difference between them.

e.g

job1 runs at 21:00
job2 runs at 01:00

diff = +04:00 hours

I would also need negative numbers i.e where job1 runs after job2

can anybody help?

cheers

Rik

 

[predamarcel]

The idea is to get UTC time (seconds since 1970/01/01 00:00:00)

if your `date' command suprts %s (UTC) then:
u@h:w$ job1_time=`date +%s`
u@h:w$ job2_time=`date +%s`
u@h:w$ delay=$((job2_time-job1_time))
u@h:w$ echo $((delay/60/60)):$((delay/60%60)):$((delay%60))


verified with
ksh --version
version sh (AT&T Labs Research) 1993-12-28 m
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