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Makefile saw an old makefile and couldn't help myself 1 year ago
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README.md

If you use more than 3 lines of code from the internet, cite them in a comment. It's cause for an 'f' otherwise!!!!

THIS IS OUT OF 20 POINTS!!!! No one can get more than 20 points.

If you work in pairs, then I'll give each person 2/3 of the total points. So if a team gets 30 (and each person gets 15), I'll give each student 20.

If you work in threes, then I'll give each person 1/2 of the total points. So if a team gets 40 (and each person gets 13.3333), I'll give each student 20.

The Shell Assignment (total 42 points)

  • 1 Can run an executable
    • /bin/ls
  • 1 You search the path for the executable
    • ls
  • 1 Can do file input redirection "<"
    • ls > fred
  • 1 Can do file output redirection ">"
    • ls < fred
  • 2 Can do command piping "|"
    • ls | wc
  • 1 Can do lots of pipes
    • ls | grep fred | wc
  • 1 Can do at least one combination of these things
    • ls | wc > fred
  • 4 Can do any combination of three of <, >, and |
    • cat < filename | sort > sortedFile.txt
  • 2 Can set enviornment variables
    • PATH=:/bin:/sbin:/usr/sbin:/usr/bin
  • 2 Expands enviornment variables on the command line
    • ls $HOME
  • 2 Does filename expansion "glob" (Hint: Use the built in glob.)
    • ls a*b
  • 1 Knows how to change directory
    • cd /fred
  • 1 Bang last command
    • !l runs ls
  • 1 Bang # command
    • !4 runs 4th command from history
  • 1 Queue commands
    • make ; make install
  • 1 Can have lots of semicolons
    • ls; sleep 3; rm fred
  • 2 Change Prompt
    • PS1="what is you command?"
  • 3 Can run commands in the background.
    • processImage &
  • 1 Concatenate commands with &. Only runs next command if the previous comand returned success.
    • cd /home/rappleto & rm fred.txt
  • 1 Catch Keyboard interrupt
    • ctrl + c = back to prompt
  • 1 Replace "~" with the home directory
    • rm ~/junkfile
  • 1 Control-L clears the screen
    • ctrl-l = clear screen
  • 3 When they misspell a command, offer a suggestion
    • (user) lss
    • (shell) Did you mean ls?
  • 2 Can run commands from a file
    • . scriptFile.txt
  • 2 Tab Completion and Arrow History
  • 1 Saves and reloads history to a file
  • 2 Automatically runs a file called .myshell when it starts
  • 2 Only runs execuatables from an approved list
  • -2 Commands cannot have arguments (i.e. ls -l does not work).

25 pts /20

Some cases to consider

  • A person tries to run a non-executable.
  • A person tries to read or write to a non-existent file.
  • A person tries to read or write to a file they do not have permissions on.
  • A person tries a non-sensical command. (i.e. ls > foo > fee < doo < dee)
  • A person tries to pipe to a non-command (i.e. ls | /tmp/foo.txt)
  • A person tries to pipe from a non-command (i.e. /tmp/foo | ls)
  • A person tries to expand a non-variable (i.e. ls $DOES_NOT_EXIST)
  • A regular expression matches no files.
  • A regular expression matches one file.
  • A regular expression matches lots of files.
  • A person tries to change directory to something that does not exist.

These programs are due Friday before finals week. It will take a totally excellent excuse to move this at all.