Tetsuo's Shell (Tsh)

This is a toy shell I wrote to become more familar with C.

Features

• Interactive commands (less, vi, etc).
• Piping.
• I/O redirection.
• Using environment variables as args.
• Records command duration with SQLite (because why not).
• Shell history.

Improvements

• File globbing.
• More granular I/O redirection (choosing between stdout and stderr).
• More operators.
• Job control.
• Make less buggy.

Dependencies

• CMake.
• GNU ReadLine.
• SQLite Version 3.
• Attractive Chaos' Klib.

Build

Bring in Git submodules.

git submodule init
git submodule update

Run build.sh to invoke the CMake build.

sh build.sh [BUILD_TYPE:debug/release/asan/ubsan/scan]

Usage

To execute a single command.

build/[BUILD_TYPE]/tsh [COMMAND]

To run Tsh as the active shell (Ctrl-D to exit).

build/[BUILD_TYPE]/tsh

To run an Address Sanitized build.

ASAN_OPTIONS="symbolize=1" build/asan/tsh

To run an Undefined Behaviour Sanitized build.

UBSAN_OPTIONS="print_stacktrace=1" build/ubsan/tsh

Built-in commands

• cd: Change current working directory.
• help: Display help text.
• exit: Exit the shell.
• tshstats: Display command duration information (backed by SQLite).
• history: Display the shell history (backed by SQLite).