C-Shell

Shell made using C language.

Functionalities

On starting, the shell to display the below prompt <Username@SystemName:current_path>

Commands:

• all the default bash commands
• hop
  • hop ((~ | . | .. | - | name)*)?
  • ”~” or No Arguments: Change the CWD to the shell’s home directory.
  • ”.”: Do nothing (i.e. stay in the same CWD)
  • ”..”: Change the CWD to the parent directory of the CWD, or do nothing if the CWD has no parent directory.
  • ”-“: Change the CWD to the previous CWD or do nothing if there was no previous CWD. So, after starting the shell, till the first hop command which was not a “-“ was run, you must do nothing.
  • “name”: Change the CWD to the specified relative or absolute path.
  • If the directory does not exist, outputs “No such directory!”

How to Run

• make clean
  
• make all
  
• ./shell.out