Posix shell implementation with limited libraries for the 42network cursus.

• Ability to customize the prompt.
• Complete prompt with edition and multiple line support.
• Redirection and aggregation operators.
• Pipes and separators.
• && and || logical operators.
• Monitoring of intern shell variables.
• Job control monitoring, with buitl-ins jobs, fg, bg and the & operator
• A correct monitoring of all signals
• Inhibitors ” (double quote), ’ (simple quote) and \
• Control substitution: $()
• ZSH-like command completion with scrolling.
• Contextual dynamic completion of commands, built-ins, files, internal and environment variables. What is meant by contextual? re-we use the “ls /” command and your cursor is on the /, then a contextual completion will only propose the content of the root folder and not the commands or built-ins. Same for this case: “echo ${S”, the completion should only propose variable names that start with S, whether internal or environmental.
• Alias management via built-ins alias and unalias.
• A hash table and built-in hash to interact with it.
• The built-in test with the following operators: texttt-b, -c, -d, -e, -f, -g, -L, -p, -r, -S, -s, -u, -w, -x, -z, =, !=, -eq, -ne, -ge, -lt, -le, !. As well as the possibility of a simple operand, without operator.
• Complete management of the history:
  • Expansions:
  • !!
  • !word
  • !number
  • !-number
  • Saving to a file so that it can be used over several sessions
  • Built-in fc (all POSIX options)
  • Incremental search in the history with CTRL-R
• Tilde expansion and additional parameter formats:
  • ~
  • ${parameter:-word}
  • ${parameter:=word}
  • ${parameter:?word}
  • ${parameter:+word}
  • ${#parameter}
  • ${parameter%}
  • ${parameter%%}
  • ${parameter#}
  • ${parameter##}
• The following builtins:
  • cd
  • fc
  • jobs
  • fg
  • bg
  • test
  • alias
  • unalias
  • echo
  • exit
  • export
  • false
  • true
  • hash
  • history
  • pwd
  • rehash
  • set
  • type
  • unset
  • unsetenv