Coded by: Prajwal Krishna
This README file contains :
- Information About the Shell
- How to run
- List of builtin commands
- Features
- File structure
An interactive user defined bash-like shell which supports semi-colon separated list of commands.It can take commands in input check if a builtin exists if exists then run the builtin else run it as separate process. The shell also supports input and output redirection along with piping of commands.
- make ItsPKsshell
- ./ItsPKsshell
- quit for graceful exit
- exit for immediate exit
| Command | Description | Flags | No. of Arguments |
|---|---|---|---|
| ls | Shows files and directory | -a,-l | 0 or more |
| pwd | Shows current directory | - | - |
| cd | Change directory | - | 1 |
| echo | Print on terminal | - | 0 or more |
| exit | Exit terminal | - | - |
| pinfo | Display process Info of given process id | - | 0 or 1 |
| clock | Starts foreground clock | -t,-n | 1 or 2 |
| remindme | Gives a reminder after time given | - | 2 |
| setenv | Can be used to set(i.e create or change) environment variable | - | 1 or 2 |
| unsetenv | Can be used to unset(remove) an environment variable | - | 1 |
| jobs | Shows all background process with status and index | - | - |
| kjob | Used to send kill signal to process listed in jobs | - | 2 |
| fg | Used to bring a background process to foreground | - | 1 |
| bg | Used to make stopped background process running | - | 1 |
| overkill | Kills all the background processes | - | - |
| quit | Graceful exits | - | - |
| mkdir | Creates a new directory | -p | 1 or 2 |
| mgdir | Creates a new directory and takes into it | -p | 1 or 2 |
- Supports semi-colon separated commands
- Has built in clock
- Modular code structure
- Supports background process creation when command followed by '&'.
- Prints exit message when background exits
- Supports input and output file redirection
- Supports piping of commands
- Supports Ctrl + C and Ctrl + Z signals
- Unique builtins like pinfo, clock, remindme ,jobs, kjob, overkill ,quit,mgdir
- argumentize.c - Have functions to parse a command
- builtin_pk_ls.c - Have builtin ls command
- exec_clock.c - Have clock builtin command
- commandParser.c - Have command parser
- display.c - Have functions to display
- execCmd.c - Logic to execute commands
- input.c - Have functions to take input of line from user
- lineParser.c - Parse a line taken from user and seperate commands
- pinfo.c - Functions to implement process information
- main.c - Master starts the process of shell
- redirection.c - Has functions to implement I/O redirection
- pipe.c - Has functions to implement piping of commands
- exec_reminder.c - Implementation of remindme
- custom_header.h - Has functions declaration and prototypes
- makefile - Makes all files
- LICENSE - MIT License
- README.md - Readme aka about