| 0,0 → 1,46 |
|---|
| Student Information |
| ------------------- |
| Kevin Lee - klee482 - group244 |
| |
| |
| How to execute the shell |
| ------------------------ |
| The shell can be started by running ./esh |
| Basic functionality can be tested by running ./stdriver.py -b |
| Advanced functionality can be tested by running ./stdriver.py -a |
| |
| |
| Important Notes |
| --------------- |
| A more comprehensive test for exclusive access can be done by |
| running/suspending vim from inside the shell. |
| |
| |
| Description of Base Functionality |
| --------------------------------- |
| The shell implements the following built in commands: jobs, fg, bg, kill, stop. |
| The shell also implements \^C and \^Z to stop and suspend foreground |
| processes. For each specified pipeline (seperated by ;), the first command |
| is checked to see if it is a built in command. If it is, the built in command is |
| executed and all following commands in the pipeline are ignored. The command |
| jobs outputs a list of all background jobs and the state of each job along with |
| a job ID. The job ID can then be used by commands fg, bg, kill, and stop. \^C |
| kills the current foreground job (including the esh shell) and \^Z suspends the |
| current foreground job. |
| |
| |
| Description of Extended Functionality |
| ------------------------------------- |
| The shell also implements I/O redirection, pipes, and exclusive access. |
| Multilpe commands can be chained together using '|' so that the output of |
| the first process goes to the input of the second process. I/O redirection |
| is also implemented so that a file can be used as the imput to the first |
| command using '<' . The output of the last process can be directed to a file |
| as well using '>'. Appending the output to the specified file works as well |
| with '>>'. Exclusive access is also implemented using process groups and |
| terminal access to allow programs such as vim to work. |
| |
| |
| List of Plugins Implemented |
| --------------------------- |
| N/A |