POSIX Shell Implementation

Overview

The shell can execute system commands, manage foreground/background processes, and supports built-in commands like cd, pwd, echo, ls, and others.

Features Implemented

• Custom shell prompt with username, system name, and current directory.
• Built-in commands: cd, pwd, echo, ls.
• Execution of system commands in both foreground and background.
• Background process handling (prints PID of created process).
• pinfo to display process information.
• search command for recursive file/directory search.
• Input/output redirection (<, >, >>).
• Pipelines (|) and redirection with pipelines.
• Signal handling (CTRL-C, CTRL-Z, CTRL-D).
• Autocomplete for commands and files/directories.
• Command history with support for up/down arrow keys.

Files

• main.cpp – entry point of the shell.
• cd.cpp – implementation of cd.
• pwd.cpp – implementation of pwd.
• echo.cpp – implementation of echo.
• ls.cpp – implementation of ls.
• pinfo.cpp – implementation of pinfo.
• search.cpp – implementation of search.
• redirection.cpp – input/output redirection handling.
• pipeline.cpp – implementation of pipes.
• process.cpp – process creation and background/foreground handling.
• history.cpp – command history management.
• utils.cpp – helper functions.
• allFunctions.h – header file containing function declarations.
• makefile – compiles the project.
• README.md – project documentation.

How to Compile

make