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Full Discussion: Can we get Tuesday's date of the current week in UNIX
Top Forums Shell Programming and Scripting Can we get Tuesday's date of the current week in UNIX Post 302836783 by Corona688 on Wednesday 24th of July 2013 04:53:06 PM
Old 07-24-2013
Quote:
Originally Posted by rajeevm
I am using Korn shell script . It would be great if I can get using awk or sed
It's not a text replacement problem. What if yesterday was last month? How many days was last month again? Is it always the same number of days? What date corresponds to what day of the week? Etc, etc, etc. It's not trivial. Just call something that knows what a date is.

It's possible to do this in some versions of awk. Finding out which one you have will be a game of 20 questions since you don't want to tell us what your system is.

It's possible to do this in some versions of ksh. Finding out which one you have will be a game of 20 questions since you don't want to tell us what your system is.

It's possible to do this in some versions of the date utility. Finding out which one you have will be a game of 20 questions since you don't want to tell us what your system is.

It's possible to do this in any standard installation of Perl. I don't need to know what your system is.

I posted perl because it works in more places than everything else. Anything else depends on having the exact right version of the exact right shell, the exact right version of the exact right nawk, or having a new enough version of the GNU date utility.

I can turn the perl into a one-liner you can embed in ksh or whatever...
Code:
perl -e 'use POSIX qw(strftime);  print strftime("%Y%m%d\n", localtime(time() - ((strftime("%u",localtime)-2) * 86400)));'

Quote:
I tried using awk its not working
What did you try? In what way is it "not working"?
Last edited by Corona688; 07-24-2013 at 06:09 PM..
 

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LEARN ABOUT DEBIAN

mhc

mhc(5)								File Formats Manual							    mhc(5)

NAME

       mhc - Message Harmonized Calendaring system

DESCRIPTION

       This  manual  page  documents  briefly the mhc file format.  This manual page was written for the Debian GNU/Linux distribution because the
       original program does not have a manual page.

FIELDS

       Mhc file format is based on STD11/RFC822: Standard for the format of ARPA Internet text messages.  In mhc file, the following extra  header
       fields are used.

       X-SC-Day:
	      Date of event in format yyyymmdd.  You can specify multiple date with space separated like:

		 X-SC-Day: 19990409 19990413

	      which means April 9th 1999 and April 13th 1999.

       X-SC-Time:
	      Time of event in format hh:mm-hh:mm or hh:mm.  For event which has no meanings about time, you can leave it empty in this field.

       X-SC-Duration:
	      Period  of event in yyyymmdd-yyyymmdd.  You can omit start date or end date, like "19991121-".  X-SC-Duration: is used only to limit
	      date specified by X-SC-Day: or X-SC-Cond, so you can't describe event date only by X-SC-Duration:.  If X-SC-Duration: is	empty,	it
	      means no limit.

       X-SC-Cond:
	      Condition of event date by using following keyword.

		 00-31 Day of month.

		 1st 2nd 3rd 4th 5th Last Week in month.

		 Sun Mon ... Sat Day of week.

		 Jan Feb ... Dec Month

	      Examples,

		 X-SC-Cond: Tue Fri
			Every Tuesday and Friday.

		 X-SC-Cond: 31 Aug
			Every August 31th.

		 X-SC-Cond: 1st 3rd Fri
			Every 1st and 3rd Friday.

		 X-SC-Cond: Fri
		 X-SC-Day: !19990409
			Every Friday, but except April 9th 1999.

		 X-SC-Cond: Fri 13
			Every 13th and Every Friday, not 13th Friday.

       X-SC-Alarm:
	      Hint  for alarm of event.  Currently, mhc.el doesn't alaram, but gemcal will pop-up alarm window.  It will be useful if you transfer
	      this event to PalmOS.  In X-SC-Alarm:, you can specify the number (1 to 99) with suffix such as minute, hour or day.  For example,

		 X-SC-Alarm: 10 minutes
			Alarm 10 minutes before event.

		 X-SC-Alarm: 3 hour
			Alarm 3 hours before event.

		 X-SC-Alarm: 3 day
			Alarm 3 day before event.

       X-SC-Subject:
	      Subject of event. unstructured?

       X-SC-Location:
	      Location of event. unstructured?

       X-SC-Category
	      Category of event.  Any keyword, space separeated.  Case ignored.

       X-SC-Recoard-Id:
	      Internal use only.

SEE ALSO

       adb2mhc(1) gemcal(1), mhc-sync(1), mhc2palm(1), palm2mhc(1), today(1).

AUTHOR

       This program was written by Yoshinari Nomura <nom@quickhack.net> and this manual page was written by  Fumitoshi	UKAI  <ukai@debian.or.jp>,
       for the Debian GNU/Linux system (but may be used by others).

								    23 Jun 2000 							    mhc(5)
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