mjhjmtu

My same question here maybe closed (I already received two close votes). I hope one of you can help here. Here's my question:

I work in a solaris server and the date -d option is not there. No gdate as well. I know fair amount of questions have been asked related to this, I have gone through almost all of them. But I don't know perl so I don't know how to modify those answers w.r.t my requirement.

Here's what I have which works in Linux:

date -d "$hr:$mi $duration minutes" +'%H%M'

where $hr and $mi are hours and mins, $duration is in minutes.

When I run like this in Linux, I get this:

date -d "23:28 60 minutes" +'%H%M'
0028

When I run this in solaris, I get:

date: illegal option -- d Usage: date [-u] ...

Is there an awk solution here since my perl is ancient?

Requote, I'm having the same problem as here, only I don't have the luxury of using date -d. I'm open to any solution in python or perl, need not be an one liner.

there is a single little difficulty : splitting arround ":", there is an awk function : split(what,where,sep).

I tried in a solaris (it is a one line command)

echo 23:28 60 |
 awk 'split($1,H,":") ; printf "%2d:%02dn",H[1]+(H[2]+$2)/60, (H[2]+$2)%60 '

where

• split($1,H,":") will put 23 in H[1] and 28 in H[2]

use

echo 23:28 60 |
 awk 'split($1,H,":") ; printf "%2d:%02dn",(H[1]+(H[2]+$2)/60)%24, (H[2]+$2)%60 '

to stay in 0-23 range for hour. change format string in printf to "%02d:%02dn" to have a leading 0

With awk, you could do the following:

awk -v dayt="2017 11 10 23 28 23" 'tmstmp=mktime(dayt)+60;print strftime("%M:%S",tmstmp)' <<< ""

Pass the FULL date and time to awk with the -v flag and then use the awk mktime to get a number representation of the date/time, adding 60 and then strftime to convert the representation to the required format.

This is a bit of a experimental hack but works with modern versions of bash. I tested it on CentOS 7 and Fedora 26

#!/bin/bash

hr="23"
mi="28"
duration="60"

printf '%(%H%M)Tn' "$((-(19 * 60 * 60) + (hr * 60 * 60) + (mi * 60) + (duration * 60) ))"

Result is 0028.