bsh-rs

This is the Rust version of my bsh shell program.

Features

• runs builtin and external commands
• expands history and environment variables
• supports |, ;, ||, &&
• supports job control
• has the following builtins:
  • cd
  • history
  • kill
  • exit
  • bg, fg, jobs
  • declare, unset

Goals

• learn idiomatic Rust
• make the C version of bsh more memory safe by using Rust's memory safety principles
• contribute back to the Rust ecosystem
  • rustyline: Add const way of accessing editor history
  • rustyline: Fix multi-line prompts clearing too many lines
  • nix: add wrapper for signal(3) function

Usage

$ bsh --help
bsh.

Usage:
    bsh [options]
    bsh [options] -c <command>
    bsh [options] <file>
    bsh (-h | --help)
    bsh --version

Options:
    -h --help       Show this screen.
    --version       Show version.
    -c              If the -c option is present, then commands are read from the first non-option
                        argument command_string.
    --log=<path>    File to write log to, defaults to ~/.bsh_log
$ bsh
0|~/code
$ help
bg: bg [<jobspec>...]
cd: cd [dir]
declare: declare [name[=value] ...]
exit: exit [n]
fg: fg [job_spec]
help: help [command ...]
history: history [-c] [-s size] [n]
jobs: jobs [options] [<jobspec>...]
kill: kill pid | %jobspec
unset: unset [name ...]

Installation

git clone https://github.com/rgardner/bsh-rs
cd bsh-rs
# run bsh via cargo
cargo run
# run bsh directly
target/debug/bsh
# display bsh help
target/debug/bsh --help

Development

# setup dev environment (e.g. git hooks)
./scripts/dev_setup.sh
# Check program for errors, quicker than full build
cargo check
# build
cargo build
# run lints
cargo clippy
# run tests
cargo test
# generate documentation
cargo doc --document-private-items

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.