Project 3 -- Working of the simple shell breakdown (90 pts)

• ___/0 setting up path in a linked list
• ___/15 parsing of command line (with fgets() and strtok()) and executing command
• getting command and setting up an argv for execve()
• checking for builtin command, absolute path, searching PATH, running correctly
• proper use of fork(), execve(), waitpid()
• ___/2 checking that file is executable with access() before executing
• ___/4 properly working which command, traverses linked list for path
• ___/3 properly working where command, again travese linked list
• ___/4 properly working cd command, with error checking
• chdir to dir given, error is dir nonexistant, etc.
• going to homedir with no args
• 'cd -' feature
• ___/4 list command (proper use of opendir() and readdir())
• list current dir with no args
• list a given dir(s)
• ___/1 exit command
• ___/4 kill and pid commands
• kill works to send a default signal to a process
• kill works to send any signal to a process
• ___/2 prompt command, with an argument and without
• ___/1 displaying the prompt correctly with prefix and cwd
• ___/1 pwd command
• ___/7 printenv command
  
  • show all of environment with no arg
  • show just one variable
  • error conditions
• ___/7 setenv command
• with no args prints environment
• sets the variable correctly with one or two args
• Shell works correctly after updating PATH and HOME
• ___/1 printing of return status if command exited with a nonzero value
• ___/1 printing out of command to execute
• ___/5 handling of Ctrl-C (SIGINT) and sending to child process with signal handler
• ___/3 ignoring SIGTERM and (Ctrl-Z) SIGTSTP
• ___/5 Doesn't segfault, specifically when:
• Ctrl-D is given to command line prompt
• Ctrl-C (SIGINT) is given to command line prompt
• When enter (return) is given to command line prompt
• ___/8 The * wildcard implemented correctly
• Works with * by itself
• Works with chars prepended (s*)
• Works with chars appended (*.c)
• Works with chars prepended and appended (s*.c)
• Works to match zero chars (s*h.c matches sh.c)