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 return 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 env::join_paths().

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 env::var().

Functions

args

Returns the arguments that this program was started with (normally passed via the command line).

args_os

Returns the arguments that 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_dirDeprecated

Returns the path of the current user’s home directory if known.

join_paths

Joins a collection of Paths 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 key to the value value 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 or there’s another error.

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.