metalx1000

BASH Calculate Fire Fighting Shift

May 2nd, 2020 (edited)
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  1. #!/bin/bash
  2. ######################################################################
  3. #Copyright (C) 2020  Kris Occhipinti
  4. #https://filmsbykris.com
  5.  
  6. #Calculate which shift is today (based on a 3 day cycle)
  7.  
  8. #This program is free software: you can redistribute it and/or modify
  9. #it under the terms of the GNU General Public License as published by
  10. #the Free Software Foundation, either version 3 of the License, or
  11. #(at your option) any later version.
  12.  
  13. #This program is distributed in the hope that it will be useful,
  14. #but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16. #GNU General Public License for more details.
  17.  
  18. #You should have received a copy of the GNU General Public License
  19. #along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20. ######################################################################
  21.  
  22. A="$(date -d 2013-05-01 +%s)"
  23. B="$(date -d 2013-05-02 +%s)"
  24. C="$(date -d 2013-05-03 +%s)"
  25.  
  26. today="$(date +%F)"
  27. A=$(( ( `date -d "$today" +%s` - $A ) / (24*3600)%3 ))
  28. B=$(( ( `date -d "$today" +%s` - $B ) / (24*3600)%3 ))
  29. C=$(( ( `date -d "$today" +%s` - $C ) / (24*3600)%3 ))
  30.  
  31. [[ "$A" == 0 ]] && echo "Today is A Shift"
  32. [[ "$B" == 0 ]] && echo "Today is B Shift"
  33. [[ "$C" == 0 ]] && echo "Today is C Shift"
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