std::env - Rust
Description: API documentation for the Rust `env` mod in crate `std`.
Keywords: rust, rustlang, rust-lang, env

# 1.0.0[−][src]Module std::env

Inspection and manipulation of the process's environment.

This module contains functions to inspect various aspects such as environment variables, process arguments, the current directory, and various other important directories.

There are several functions and structs in this module that have a counterpart ending in `os`. Those ending in `os` will return an `OsString` and those without will be returning a `String`.

## Modules

consts | Constants associated with the current target

## Structs

Args | An iterator over the arguments of a process, yielding a `String` value for each argument.
ArgsOs | An iterator over the arguments of a process, yielding an `OsString` value for each argument.
JoinPathsError | The error type for operations on the `PATH` variable. Possibly returned from the `env::join_paths` function.
SplitPaths | An iterator that splits an environment variable into paths according to platform-specific conventions.
Vars | An iterator over a snapshot of the environment variables of this process.
VarsOs | An iterator over a snapshot of the environment variables of this process.

## Enums

VarError | The error type for operations interacting with environment variables. Possibly returned from the `env::var` function.

## Functions

args | Returns the arguments which this program was started with (normally passed via the command line).
args_os | Returns the arguments which this program was started with (normally passed via the command line).
current_dir | Returns the current working directory as a `PathBuf`.
current_exe | Returns the full filesystem path of the current running executable.
home_dir | Deprecated Returns the path of the current user's home directory if known.
join_paths | Joins a collection of `Path`s appropriately for the `PATH` environment variable.
remove_var | Removes an environment variable from the environment of the currently running process.
set_current_dir | Changes the current working directory to the specified path.
set_var | Sets the environment variable `k` to the value `v` for the currently running process.
split_paths | Parses input according to platform conventions for the `PATH` environment variable.
temp_dir | Returns the path of a temporary directory.
var | Fetches the environment variable `key` from the current process.
var_os | Fetches the environment variable `key` from the current process, returning `None` if the variable isn't set.
vars | Returns an iterator of (variable, value) pairs of strings, for all the environment variables of the current process.
vars_os | Returns an iterator of (variable, value) pairs of OS strings, for all the environment variables of the current process.