uShell

That is our group project to answer an essential question, that computer science pioneer in 1960s were faced with - "How users can interact with OS kernel?"

what we have implemented:

Builtin commands:

• cd with -i, -P, -u flags
• pwd with -L, -P flags
• export
• unset
• fg with %n and %str arguments
• env with -i, -P, -u flags
• which with -a, -s flags
• echo with -n, -e, -E flags
• exit
• history
• Managing CTRL+D, CTRL+C and CTRL+Z signals

Work with terminal:

• Managing ArrowUp and ArrowDown buttons to watch history
• Command line editing
• Working with any Unicode symbols
• Supporting text insertion

Work with processes:

• Support of pipes "|"
• Support of redirection output to file ">" and ">>"
• Support of redirection input from file "<"
• Support of logical operators "&&" and "||"
• Support of double quotes, back quotes and single quotes