Change directory to your ~/bin subdirectory:
% cd ~/bin
Create a new Bash shell script called cal2018; if you use emacs, you can do it with:
% emacs -nw cal2018
with vi, like:
% vi cal2018
(Hint: you may want to also login with a second window, if you don't want to use a "shell" buffer inside of emacs for testing your script.)
Your shell script should create output that looks like this:
2018 _________________________________________
January February March / If you stand on your head, you will get \
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa \ footprints in your hair. /
1 2 3 4 5 6 1 2 3 1 2 3 -----------------------------------------
7 8 9 10 11 12 13 4 5 6 7 8 9 10 4 5 6 7 8 9 10 \ ^__^
14 15 16 17 18 19 20 11 12 13 14 15 16 17 11 12 13 14 15 16 17 \ (oo)\_______
21 22 23 24 25 26 27 18 19 20 21 22 23 24 18 19 20 21 22 23 24 (__)\ )\/\
28 29 30 31 25 26 27 28 25 26 27 28 29 30 31 ||----w |
|| ||
______________________________________
April May June / You teach best what you most need to \
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa \ learn. /
1 2 3 4 5 6 7 1 2 3 4 5 1 2 --------------------------------------
8 9 10 11 12 13 14 6 7 8 9 10 11 12 3 4 5 6 7 8 9 \
15 16 17 18 19 20 21 13 14 15 16 17 18 19 10 11 12 13 14 15 16 \
22 23 24 25 26 27 28 20 21 22 23 24 25 26 17 18 19 20 21 22 23 .--.
29 30 27 28 29 30 31 24 25 26 27 28 29 30 |o_o |
|:_/ |
// \ \
July August September (| | )
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa /'\_ _/`\
1 2 3 4 5 6 7 1 2 3 4 1 \___)=(___/
8 9 10 11 12 13 14 5 6 7 8 9 10 11 2 3 4 5 6 7 8
15 16 17 18 19 20 21 12 13 14 15 16 17 18 9 10 11 12 13 14 15
22 23 24 25 26 27 28 19 20 21 22 23 24 25 16 17 18 19 20 21 22
29 30 31 26 27 28 29 30 31 23 24 25 26 27 28 29
30
October November December
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 1 2 3 1
7 8 9 10 11 12 13 4 5 6 7 8 9 10 2 3 4 5 6 7 8
14 15 16 17 18 19 20 11 12 13 14 15 16 17 9 10 11 12 13 14 15
21 22 23 24 25 26 27 18 19 20 21 22 23 24 16 17 18 19 20 21 22
28 29 30 31 25 26 27 28 29 30 23 24 25 26 27 28 29
30 31
Here are some tools that you can use to do the assignment:
(Nota bene: the file1 and file2 arguments that were previously above in the pr invocation meant, as explained in class, to be explanatory — those were not to be literally included in your script since you are not allowed to use temporary files.)
So analyzing the above output, the different components are:
Here is an outline of how I wrote my script:
#!/bin/bash # Get the year from "date". # Increase the year by one and then call the "cal" program with that year. Write the # output to a variable. # Create fortunes and pipes to cowsay. # Now use "pr" to push everything together # and output everything to stdout. # # -or- # # Do all of the above in a single one-liner for extra credit on this assignment. exit 0
Next year must be computed, not a fixed value of "2018".
You may not use any temporary files for this assignment; if you need to save state, use a variable.
If you manage to write this as a "one-liner" (all of the active code fits into a single line with no semicolons, no &&, and no || constructions), then you will get 5 points of extra credit on the assignment.
Once you have written your program, add it to your .bash_profile right after your weather report so that when you login, it should look something like this:
This assignment is due by 11:59pm on Monday, July 17. You don't have to turn anything in; the grader will check this directly on your account on cop3353.org.