ICSH

Tag 0.1.0 Interactive command-line interpreter

• echo : print text on the console
• !! : repeat the last command
• exit : exit with the given exit code

Tag 0.2.0 Script mode

• ./icsh test.sh : return the input command content in the test.sh (in the current directory) to the console

Tag 0.3.0 Running an external program in the foreground

• run the command that already exist in SHELL

Tag 0.4.0 Signal Handler

• Ctrl+Z : to suspend the process in the current foreground (not your shell)
• Ctrl+C : to kill the process in the current foreground (not your shell)
• echo $? : to print the exit status code of the previous command. You may assume that all build-in commands exits with exit code 0

Tag 0.5.0 I/O redirection

• reDir() : <Input/ >Output Redirection

Tag 0.6.0 Background jobs and job control

• command followed by "&" : will run as a background job
  • listed in the jobList[100] with 100 jobs limit
• jobs : this command will list all the current jobs that are running/stopped
• fg %<job_id> : Brings the job identified by <job_id> into the foreground
  • does not continue, but start from the beginning
• bg %<job_id> : Execute the suspended job identified by <job_id> in the background
  • does not continue, but start from the beginning, run in fg instead

Tag 0.7.0 Extra features

• Allowing users to customize their prompt at the beginning of the program
  • Can type the prompt text
  • Choose a font color (pink/red/green/yellow/blue/white)
  • Choose styles (bold,underline)
  • Or choose the default version "icsh $ "
• help() : this command return the instructions of this IC SHELL
• !!!! : repeat the second last command