Shell (ASH)

Aim

• To build a shell performing basic operations.
• Must have cd, ls, pwd and echo inbuilt.
• Other commands must be implemented using exec.

Constraints

• No piping implemented yet.
• Some unhandled corner cases.

Usage

• Run command make;make clean;./ash to build from source or simply ./ash on terminal

Working

• shell.c - main loop of the shell, output prompt and input command.
• command.c - all form of string parsing, command processing and call to respective functions is performed here.
• init.c - initializes prompt.
• list.c - implements ls and variants.
• pwd.c - implements pwd.
• cd.c - implements cd and variants.
• echo.c - implements echo.
• others.c - implements other commands using exec.
• history.c - implements history command.
• nightswatch.c - implements a specific version of watch command.
• pinfo.c - implements pinfo command.
• setenv.c - implements setenv command.
• unsetenv.c - implements unsetenv command.