Crate yash_env

This crate defines the shell execution environment.

A shell execution environment, Env, is a collection of data that may affect or be affected by the execution of commands. The environment consists of application-managed parts and system-managed parts. Application-managed parts are implemented in pure Rust in this crate. Many application-managed parts like functions and variables can be manipulated independently of interactions with the underlying system. System-managed parts, on the other hand, depend on the underlying system. Attributes like the working directory and umask are managed by the system to be accessed only by interaction with the system interface.

The System trait is the interface to the system-managed parts. RealSystem provides an implementation for System that interacts with the underlying system. VirtualSystem is a dummy for simulating the system’s behavior without affecting the actual system.

Re-exports

• pub use self::system::virtual::VirtualSystem;
• pub use self::system::real::RealSystem;
• pub use self::system::SharedSystem;
• pub use self::system::System;
• pub use unix_path as path;
• pub use unix_str as str;

Modules

• builtin
  Type definitions for built-in utilities.
• function
  Type definitions for functions.
• input
  Methods about passing source code to the parser.
• io
  Type definitions for I/O.
• job
  Type definitions for job management.
• option
  Type definitions for shell options
• pwd
  Working directory path handling
• semantics
  Type definitions for command execution.
• signal
  Type definitions for signals
• stack
  Runtime execution context stack
• subshell
  Utility for starting subshells
• system
  System and its implementors.
• trap
  Signal and other event handling settings.
• variable
  Items for shell variables

Structs

• Env
  Whole shell execution environment.