topic Re: Script question in Operating System - HP-UX

Script question

Jeff Picton — Wed, 03 Sep 2003 09:06:49 GMT

Hi

Can anybody tell me how to determine from a day of the week output, how I may classify this as an A cycle, B cycle or C cycle assuming each cycle is of duration 7 days ?

Re: Script question

Massimo Bianchi — Wed, 03 Sep 2003 09:14:56 GMT

date +%j will tell you the day number in the year
% is the modulus operator

#!/sbin/sh
TODAY=$(date +%j)
let CYCLE=$TODAY%21
case $CYCLE in
0|1|2|3|4|5|6) echo "Cycle A";;
7|8|9|10|11|12|13) echo "Cycle B";;
14|15|16|17|18|19|20) echo "Cycle C";;
esac;

The only problem in on year-change, since the count is resetted to 0.

But maybe you can cope with it, or write additional code to keep track of the last cycle and change the script itself.

Massimo

Re: Script question

Tim Adamson_1 — Wed, 03 Sep 2003 09:17:26 GMT

Hi Jeff,

Could you elaborate a bit more on what you are trying to achieve. I don't fully understand.

Cheers,

Tim

Re: Script question

Jeff Picton — Wed, 03 Sep 2003 09:39:52 GMT

Hi Tim

I have a script caljd which calculates the julian day :-

caljd.sh -D -p 1
02

so day_of_week='caljd.sh -D -p 1' gives 02.

From this I need to use a case statement similar to that of Massimo to determine if this is cycle A B or C.

Jeff