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Full Discussion: hard question
Top Forums UNIX for Advanced & Expert Users hard question Post 302220936 by Perderabo on Saturday 2nd of August 2008 09:33:53 AM
Old 08-02-2008
If you think this is hard, you must be using the wrong language. Here it is in ksh. What you call "julian" I will call "day of year". Look up "julian day" on wikipedia. This script uses my datecalc script to allow the user to enter the endpoints as yyyymmdd. datecalc is posted to this site and our search function can find it for you.

One thing about ksh... a number with a leading zero is assumed to be octal. This is why I keep stripping leading zeros off numbers before doing arithmetic.

Code:
$ ls -1 files
A2008001231000.L2
A2008021231000.L2
A2008041231000.L2
A2008061231000.L2
A2008081231000.L2
A2008101231000.L2
$
$
$
$ ./findit
enter start yyyymmdd - 20080101
enter end yyyymmdd - 20080220
A2008001231000.L2 is in range
A2008021231000.L2 is in range
A2008041231000.L2 is in range
$
$
$
$ cat findit
#! /usr/bin/ksh

read start?"enter start yyyymmdd - "
y1=${start%????}
d1=${start#??????}
temp=${start%$d1}
m1=${temp#$y1}
m1=${m1#0}
d1=${d1#0}
doy1=$(($(datecalc -a $y1 $m1 $d1 - $y1 1 1) + 1))
#echo $start $y1 $m1 $d1 $doy1

read end?"enter end yyyymmdd - "
y2=${end%????}
d2=${end#??????}
temp=${end%$d2}
m2=${temp#$y2}
m2=${m2#0}
d2=${d2#0}
doy2=$(($(datecalc -a $y2 $m2 $d2 - $y2 1 1) + 1))
#echo $start $y2 $m2 $d2 $doy2

cd files
ls | while read name ; do
        temp=${name#?}
        temp1=${temp#????}
        f_year=${temp%$temp1}
        temp2=${temp1#???}
        f_doy=${temp1%$temp2}
        f_doy=${f_doy##*(0)}
#       echo $name $f_year $f_doy
        if ((y1<=f_year && doy1<=f_doy && f_year<=y2 && f_doy<=doy2)) ; then
                echo $name is in range
        fi
done
exit 0
$

 

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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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