Shell Programming and Scripting

It told me today was "Wednesday". Copied the exact code you wrote.


For Jim's code, I think the signs are reversed... the ( - negative) provides the ( + positive) value and visa versa.

=> . test.sh
TZ=FOO-12: Tue Jun 14 03:03:51 FOO 2011
Tuesday
TZ=FOO-11: Tue Jun 14 02:03:51 FOO 2011
Tuesday
TZ=FOO-10: Tue Jun 14 01:03:51 FOO 2011
Tuesday
TZ=FOO-9: Tue Jun 14 00:03:51 FOO 2011
Tuesday
TZ=FOO-8: Mon Jun 13 23:03:51 FOO 2011
Monday
TZ=FOO-7: Mon Jun 13 22:03:52 FOO 2011
Monday
TZ=FOO-6: Mon Jun 13 21:03:52 FOO 2011
Monday
TZ=FOO-5: Mon Jun 13 20:03:52 FOO 2011
Monday
TZ=FOO-4: Mon Jun 13 19:03:52 FOO 2011
Monday
TZ=FOO-3: Mon Jun 13 18:03:52 FOO 2011
Monday
TZ=FOO-2: Mon Jun 13 17:03:52 FOO 2011
Monday
TZ=FOO-1: Mon Jun 13 16:03:52 FOO 2011
Monday
TZ=FOO0: Mon Jun 13 15:03:52 FOO 2011
Monday
TZ=FOO+1: Mon Jun 13 14:03:52 FOO 2011
Monday
TZ=FOO+2: Mon Jun 13 13:03:52 FOO 2011
Monday
TZ=FOO+3: Mon Jun 13 12:03:52 FOO 2011
Monday
TZ=FOO+4: Mon Jun 13 11:03:52 FOO 2011
Monday
TZ=FOO+5: Mon Jun 13 10:03:52 FOO 2011
Monday
TZ=FOO+6: Mon Jun 13 09:03:52 FOO 2011
Monday
TZ=FOO+7: Mon Jun 13 08:03:52 FOO 2011
Monday
TZ=FOO+8: Mon Jun 13 07:03:52 FOO 2011
Monday
TZ=FOO+9: Mon Jun 13 06:03:52 FOO 2011
Monday
TZ=FOO+10: Mon Jun 13 05:03:52 FOO 2011
Monday
TZ=FOO+11: Mon Jun 13 04:03:52 FOO 2011
Monday
***************** GMT -4
TZ=GMT-4: Mon Jun 13 19:03:52 GMT 2011
Monday

Some prob with conversion logic, updated the code now.

Before that I need to clarify one thing. Do you want to convert the current time in GMT i.e (Mon, 13 Jun 2011 15:19) to GMT+11 and return the date.

Is this is your requirement?

I just need the day of week based on GMT-4.

In that case can you try this,

Code:

 
perl -e '
use POSIX qw(strftime);
@time=gmtime(time -(4*3600)); #=> GMT -4
$day = strftime("%A",0,0,0,$time[3],$time[4],$time[5],-1,-1,-1);
print "$day\n"'

Run this in the console without anything. This script gets the current time and converts it into GMT-4 and returns the day.

Getting warmer....but the following should echo "Tuesday" when I change to +11.


#!/bin/ksh
# input format YYYY-MM-DD prints day name
dow()
{
perl -e '
use POSIX qw(strftime);
@time=gmtime(time -(4*3600)); #=> GMT +11
$day = strftime("%A",0,0,0,$time[3],$time[4],$time[5],-1,-1,-1);
print "$day\n"'
}
echo "$(dow `date "+%Y-%m-%d"` )"

#=> GMT+11 is the comment part. If you want to change the actual time zone change it like this

Code:

 
@time=gmtime(time +(11*3600)); #=> GMT +11

Also you dont the shell scripts.

Just run only this

Code:

perl -e '
use POSIX qw(strftime);
@time=gmtime(time +(11*3600)); #=> GMT +11
$day = strftime("%A",0,0,0,$time[3],$time[4],$time[5],-1,-1,-1);
print "$day\n"'

GETMMG,

Thanks for your help. I'll be adding this Perl into my shell script to get my local time when running my scripts (GMT-4).

Thanks again.

Scott