#! /usr/bin/ksh alias datecalc=/usr/local/bin/datecalc # weekselector --- script to assist in scheduling cron jobs # Perderabo Oct 11, 2003 # # example: # You want to run command1 on the first monday of each month and # you want to run command2 on the last monday of each month. # Just use this syntax: # # 0 0 * * 1 /usr/local/bin/weekselector 1st && command1 # 0 0 * * 1 /usr/local/bin/weekselector last && command2 # # Version 2.0 March 23, 2005 # # You can now use "even" or "odd" to run commands every other week. # Whether or not a week is "even" or "odd" is arbitrary, but if one week # is "odd", the next will be "even". An "even" Monday will be in the same # week as an "even" Tuesday. integer month day year first last leap set -A mdy $(date "+%m %d %Y") month=${mdy[0]} day=${mdy[1]} year=${mdy[2]} #date "+%M %d %Y" | read month day year case $1 in even|Even|EVEN|odd|Odd|ODD) integer dow mjd fmjd wk dow=$(datecalc -d $year $month $day) mjd=$(datecalc -j $year $month $day) ((fmjd=mjd-dow)) ((wk=fmjd/7)) ((wk=wk+${#1})) ((wk/2*2 == wk)) exit $? ;; 1|1st|1ST|first|First|FIRST) last=7 ;; 2|2nd|2ND|second|Second|SECOND) last=14 ;; 3|3rd|3RD|third|Third|THIRD) last=21 ;; 4|4th|4TH|fourth|Fourth|FOURTH) last=28 ;; last|Last|LAST) # ja fe ma ap ma jn jl ag se oc no de set -A mlength xx 31 28 31 30 31 30 31 31 30 31 30 31 if ((month != 2)) ; then last=${mlength[month]} else leap=0 if ((!(year%100))); then ((!(year%400))) && leap=1 else ((!(year%4))) && leap=1 fi last=28 ((leap)) && last=29 fi;; *) exit 1;; esac ((first=last-6)) ((first<=day && day<=last)) exit $?
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