fork download
copy 
  1. #! /bin/sh
  2.  
  3. #   NAME
  4. #   
  5. #       remind -- print reminders of upcoming events
  6. #   
  7. #   USAGE
  8. #   
  9. #       remind -- show reminders for next seven days
  10. #       remind [year] month day message -- add reminder to database
  11. #   
  12. #   DESCRIPTION
  13. #   
  14. #       Remind maintains a database of reminders in the .reminders file,
  15. #       in the user's home directory, each a single line of the form
  16. #   
  17. #           [year] month day message
  18. #   
  19. #       Year is optional, and must be an integer greater than 99; if no
  20. #       year is given, the reminder applies to all years (for instance,
  21. #       birthdays).
  22. #   
  23. #       If remind is called with no arguments, it writes to standard
  24. #       output all reminders that occur within the next seven days. If
  25. #       remind is called with arguments giving a date and message, a
  26. #       reminder is added to the database. Any time remind is called,
  27. #       all past reminders are deleted from the database.
  28. #   
  29. #   EXAMPLE
  30. #   
  31. #       $ date
  32. #       Sun Jun 30 19:45:38 CDT 2019
  33. #       $ remind 4 2 Anne birthday
  34. #       $ remind 10 13 Kate birthday
  35. #       $ remind 7 4 Independence Day
  36. #       $ remind 2019 7 2 lunch with Pat
  37. #       $ remind 2019 5 13 dentist 2:00pm
  38. #       $ remind
  39. #       7 4 Independence Day
  40. #       2019 7 2 lunch with Pat
  41. #       $ cat ./reminders
  42. #       4 2 Anne birthday
  43. #       10 13 Kate birthday
  44. #       7 4 Independence Day
  45. #       2019 7 2 lunch with Pat
  46. #
  47. #   INSTALLATION
  48. #
  49. #       Copy this file to /usr/local/bin/remind, then chmod +x.
  50.  
  51. REMINDERFILE=/home/$(whoami)/.reminders
  52. TEMPFILE=$(mktemp)
  53.  
  54. if [ $# -gt 0 ]
  55. then PRINTING=0; echo "$*" >> $REMINDERFILE
  56. else PRINTING=1
  57. fi
  58.  
  59. gawk '
  60.  
  61.     # _The_Awk_Programming_Language_ by Aho, Kernighan and Weinberger
  62.     # daynum function from solution to Exercise 3.8
  63.     # only valid from 1901 to 2099; performs no validation
  64.     function daynum(y, m, d,    days, i, n) { # 1 == Jan 1, 1901
  65.         split("31 28 31 30 31 30 31 31 30 31 30 31", days)
  66.         # 365 days per year, plus one for each leap year
  67.         n = (y-1901) * 365 + int((y-1901)/4)
  68.         if (y % 4 == 0) days[2]++ # leap year from 1901 to 2099
  69.         for (i = 1; i < m; i++) n += days[i]
  70.         return n + d }
  71.  
  72.     BEGIN {
  73.         tempfile = "'$TEMPFILE'"
  74.         printing =  '$PRINTING'
  75.         "date +%Y%m%d" | getline datestring
  76.         year = substr(datestring,1,4)
  77.         today = daynum(year,
  78.                        substr(datestring,5,2)+0,
  79.                        substr(datestring,7,2)+0) }
  80.  
  81.     $1 < 100 || ($1 >= 100 && daynum($1, $2, $3) >= today) {
  82.         print $0 >> "'$TEMPFILE'" }
  83.  
  84.     printing && $1 < 100 &&
  85.     today <= daynum(year, $1, $2) &&
  86.     daynum(year, $1, $2) <= today + 7
  87.  
  88.     printing && $1 >= 100 &&
  89.     today <= daynum($1, $2, $3) &&
  90.     daynum($1, $2, $3) <= today + 7
  91.  
  92. ' $REMINDERFILE
  93.  
  94. mv $TEMPFILE $REMINDERFILE
  95.  
  96. # PLB 6/30/2019
Runtime error #stdin #stdout #stderr 0s 23336KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
stderr
copy 
whoami: cannot find name for user ID 20083
gawk: cmd. line:19: fatal: cannot open file `/home//.reminders' for reading (No such file or directory)
mv: cannot create regular file '/home//.reminders': Permission denied
https://ideone.com/xuRsYh
language:
Bash (bash 5.0.3)
created:
4 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!