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</pre><pre class="rust ">
<span class="comment">// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT</span>
<span class="comment">// file at the top-level directory of this distribution and at</span>
<span class="comment">// http://rust-lang.org/COPYRIGHT.</span>
<span class="comment">//</span>
<span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class="comment">// option. This file may not be copied, modified, or distributed</span>
<span class="comment">// except according to those terms.</span>
<span class="doccomment">//! Inspection and manipulation of the process's environment.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! This module contains functions to inspect various aspects such as</span>
<span class="doccomment">//! environment variables, process arguments, the current directory, and various</span>
<span class="doccomment">//! other important directories.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! There are several functions and structs in this module that have a</span>
<span class="doccomment">//! counterpart ending in `os`. Those ending in `os` will return an [`OsString`]</span>
<span class="doccomment">//! and those without will be returning a [`String`].</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! [`OsString`]: ../../std/ffi/struct.OsString.html</span>
<span class="doccomment">//! [`String`]: ../string/struct.String.html</span>
<span class="attribute">#<span class="op">!</span>[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">use</span> <span class="ident">error</span>::<span class="ident">Error</span>;
<span class="kw">use</span> <span class="ident">ffi</span>::{<span class="ident">OsStr</span>, <span class="ident">OsString</span>};
<span class="kw">use</span> <span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">io</span>;
<span class="kw">use</span> <span class="ident">path</span>::{<span class="ident">Path</span>, <span class="ident">PathBuf</span>};
<span class="kw">use</span> <span class="ident">sys</span>;
<span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">os</span> <span class="kw">as</span> <span class="ident">os_imp</span>;
<span class="doccomment">/// Returns the current working directory as a [`PathBuf`].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Errors</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns an [`Err`] if the current working directory value is invalid.</span>
<span class="doccomment">/// Possible cases:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// * Current directory does not exist.</span>
<span class="doccomment">/// * There are insufficient permissions to access the current directory.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`PathBuf`]: ../../std/path/struct.PathBuf.html</span>
<span class="doccomment">/// [`Err`]: ../../std/result/enum.Result.html#method.err</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // We assume that we are in a valid directory.</span>
<span class="doccomment">/// let path = env::current_dir().unwrap();</span>
<span class="doccomment">/// println!("The current directory is {}", path.display());</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_dir</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> {
<span class="ident">os_imp</span>::<span class="ident">getcwd</span>()
}
<span class="doccomment">/// Changes the current working directory to the specified path.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns an [`Err`] if the operation fails.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Err`]: ../../std/result/enum.Result.html#method.err</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">/// use std::path::Path;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let root = Path::new("/");</span>
<span class="doccomment">/// assert!(env::set_current_dir(&root).is_ok());</span>
<span class="doccomment">/// println!("Successfully changed working directory to {}!", root.display());</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_current_dir</span><span class="op"><</span><span class="ident">P</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">Path</span><span class="op">>></span>(<span class="ident">path</span>: <span class="ident">P</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> {
<span class="ident">os_imp</span>::<span class="ident">chdir</span>(<span class="ident">path</span>.<span class="ident">as_ref</span>())
}
<span class="doccomment">/// An iterator over a snapshot of the environment variables of this process.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This structure is created by the [`std::env::vars`] function. See its</span>
<span class="doccomment">/// documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`std::env::vars`]: fn.vars.html</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Vars</span> { <span class="ident">inner</span>: <span class="ident">VarsOs</span> }
<span class="doccomment">/// An iterator over a snapshot of the environment variables of this process.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This structure is created by the [`std::env::vars_os`] function. See</span>
<span class="doccomment">/// its documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`std::env::vars_os`]: fn.vars_os.html</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">VarsOs</span> { <span class="ident">inner</span>: <span class="ident">os_imp</span>::<span class="ident">Env</span> }
<span class="doccomment">/// Returns an iterator of (variable, value) pairs of strings, for all the</span>
<span class="doccomment">/// environment variables of the current process.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The returned iterator contains a snapshot of the process's environment</span>
<span class="doccomment">/// variables at the time of this invocation. Modifications to environment</span>
<span class="doccomment">/// variables afterwards will not be reflected in the returned iterator.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// While iterating, the returned iterator will panic if any key or value in the</span>
<span class="doccomment">/// environment is not valid unicode. If this is not desired, consider using the</span>
<span class="doccomment">/// [`env::vars_os`] function.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`env::vars_os`]: fn.vars_os.html</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // We will iterate through the references to the element returned by</span>
<span class="doccomment">/// // env::vars();</span>
<span class="doccomment">/// for (key, value) in env::vars() {</span>
<span class="doccomment">/// println!("{}: {}", key, value);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">vars</span>() <span class="op">-></span> <span class="ident">Vars</span> {
<span class="ident">Vars</span> { <span class="ident">inner</span>: <span class="ident">vars_os</span>() }
}
<span class="doccomment">/// Returns an iterator of (variable, value) pairs of OS strings, for all the</span>
<span class="doccomment">/// environment variables of the current process.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The returned iterator contains a snapshot of the process's environment</span>
<span class="doccomment">/// variables at the time of this invocation. Modifications to environment</span>
<span class="doccomment">/// variables afterwards will not be reflected in the returned iterator.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // We will iterate through the references to the element returned by</span>
<span class="doccomment">/// // env::vars_os();</span>
<span class="doccomment">/// for (key, value) in env::vars_os() {</span>
<span class="doccomment">/// println!("{:?}: {:?}", key, value);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">vars_os</span>() <span class="op">-></span> <span class="ident">VarsOs</span> {
<span class="ident">VarsOs</span> { <span class="ident">inner</span>: <span class="ident">os_imp</span>::<span class="ident">env</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Vars</span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (<span class="ident">String</span>, <span class="ident">String</span>);
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">String</span>, <span class="ident">String</span>)<span class="op">></span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">a</span>, <span class="ident">b</span>)<span class="op">|</span> {
(<span class="ident">a</span>.<span class="ident">into_string</span>().<span class="ident">unwrap</span>(), <span class="ident">b</span>.<span class="ident">into_string</span>().<span class="ident">unwrap</span>())
})
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">size_hint</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Vars</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">pad</span>(<span class="string">"Vars { .. }"</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">VarsOs</span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (<span class="ident">OsString</span>, <span class="ident">OsString</span>);
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">OsString</span>, <span class="ident">OsString</span>)<span class="op">></span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next</span>() }
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">size_hint</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">VarsOs</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">pad</span>(<span class="string">"VarsOs { .. }"</span>)
}
}
<span class="doccomment">/// Fetches the environment variable `key` from the current process.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Errors</span>
<span class="doccomment">///</span>
<span class="doccomment">/// * Environment variable is not present</span>
<span class="doccomment">/// * Environment variable is not valid unicode</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let key = "HOME";</span>
<span class="doccomment">/// match env::var(key) {</span>
<span class="doccomment">/// Ok(val) => println!("{}: {:?}", key, val),</span>
<span class="doccomment">/// Err(e) => println!("couldn't interpret {}: {}", key, e),</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">var</span><span class="op"><</span><span class="ident">K</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">OsStr</span><span class="op">>></span>(<span class="ident">key</span>: <span class="ident">K</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">String</span>, <span class="ident">VarError</span><span class="op">></span> {
<span class="ident">_var</span>(<span class="ident">key</span>.<span class="ident">as_ref</span>())
}
<span class="kw">fn</span> <span class="ident">_var</span>(<span class="ident">key</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">String</span>, <span class="ident">VarError</span><span class="op">></span> {
<span class="kw">match</span> <span class="ident">var_os</span>(<span class="ident">key</span>) {
<span class="prelude-val">Some</span>(<span class="ident">s</span>) <span class="op">=></span> <span class="ident">s</span>.<span class="ident">into_string</span>().<span class="ident">map_err</span>(<span class="ident">VarError</span>::<span class="ident">NotUnicode</span>),
<span class="prelude-val">None</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">VarError</span>::<span class="ident">NotPresent</span>),
}
}
<span class="doccomment">/// Fetches the environment variable `key` from the current process, returning</span>
<span class="doccomment">/// [`None`] if the variable isn't set.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`None`]: ../option/enum.Option.html#variant.None</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let key = "HOME";</span>
<span class="doccomment">/// match env::var_os(key) {</span>
<span class="doccomment">/// Some(val) => println!("{}: {:?}", key, val),</span>
<span class="doccomment">/// None => println!("{} is not defined in the environment.", key)</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">var_os</span><span class="op"><</span><span class="ident">K</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">OsStr</span><span class="op">>></span>(<span class="ident">key</span>: <span class="ident">K</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> {
<span class="ident">_var_os</span>(<span class="ident">key</span>.<span class="ident">as_ref</span>())
}
<span class="kw">fn</span> <span class="ident">_var_os</span>(<span class="ident">key</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> {
<span class="ident">os_imp</span>::<span class="ident">getenv</span>(<span class="ident">key</span>).<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"failed to get environment variable `{:?}`: {}"</span>, <span class="ident">key</span>, <span class="ident">e</span>)
})
}
<span class="doccomment">/// The error type for operations interacting with environment variables.</span>
<span class="doccomment">/// Possibly returned from the [`env::var`] function.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`env::var`]: fn.var.html</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Clone</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">VarError</span> {
<span class="doccomment">/// The specified environment variable was not present in the current</span>
<span class="doccomment">/// process's environment.</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="ident">NotPresent</span>,
<span class="doccomment">/// The specified environment variable was found, but it did not contain</span>
<span class="doccomment">/// valid unicode data. The found data is returned as a payload of this</span>
<span class="doccomment">/// variant.</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="ident">NotUnicode</span>(<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span> <span class="ident">OsString</span>),
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">VarError</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">VarError</span>::<span class="ident">NotPresent</span> <span class="op">=></span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"environment variable not found"</span>),
<span class="ident">VarError</span>::<span class="ident">NotUnicode</span>(<span class="kw-2">ref</span> <span class="ident">s</span>) <span class="op">=></span> {
<span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"environment variable was not valid unicode: {:?}"</span>, <span class="ident">s</span>)
}
}
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">Error</span> <span class="kw">for</span> <span class="ident">VarError</span> {
<span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">str</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">VarError</span>::<span class="ident">NotPresent</span> <span class="op">=></span> <span class="string">"environment variable not found"</span>,
<span class="ident">VarError</span>::<span class="ident">NotUnicode</span>(..) <span class="op">=></span> <span class="string">"environment variable was not valid unicode"</span>,
}
}
}
<span class="doccomment">/// Sets the environment variable `k` to the value `v` for the currently running</span>
<span class="doccomment">/// process.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note that while concurrent access to environment variables is safe in Rust,</span>
<span class="doccomment">/// some platforms only expose inherently unsafe non-threadsafe APIs for</span>
<span class="doccomment">/// inspecting the environment. As a result extra care needs to be taken when</span>
<span class="doccomment">/// auditing calls to unsafe external FFI functions to ensure that any external</span>
<span class="doccomment">/// environment accesses are properly synchronized with accesses in Rust.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Discussion of this unsafety on Unix may be found in:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - [Austin Group Bugzilla](http://austingroupbugs.net/view.php?id=188)</span>
<span class="doccomment">/// - [GNU C library Bugzilla](https://sourceware.org/bugzilla/show_bug.cgi?id=15607#c2)</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This function may panic if `key` is empty, contains an ASCII equals sign</span>
<span class="doccomment">/// `'='` or the NUL character `'\0'`, or when the value contains the NUL</span>
<span class="doccomment">/// character.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let key = "KEY";</span>
<span class="doccomment">/// env::set_var(key, "VALUE");</span>
<span class="doccomment">/// assert_eq!(env::var(key), Ok("VALUE".to_string()));</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_var</span><span class="op"><</span><span class="ident">K</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">OsStr</span><span class="op">></span>, <span class="ident">V</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">OsStr</span><span class="op">>></span>(<span class="ident">k</span>: <span class="ident">K</span>, <span class="ident">v</span>: <span class="ident">V</span>) {
<span class="ident">_set_var</span>(<span class="ident">k</span>.<span class="ident">as_ref</span>(), <span class="ident">v</span>.<span class="ident">as_ref</span>())
}
<span class="kw">fn</span> <span class="ident">_set_var</span>(<span class="ident">k</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>, <span class="ident">v</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>) {
<span class="ident">os_imp</span>::<span class="ident">setenv</span>(<span class="ident">k</span>, <span class="ident">v</span>).<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"failed to set environment variable `{:?}` to `{:?}`: {}"</span>,
<span class="ident">k</span>, <span class="ident">v</span>, <span class="ident">e</span>)
})
}
<span class="doccomment">/// Removes an environment variable from the environment of the currently running process.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note that while concurrent access to environment variables is safe in Rust,</span>
<span class="doccomment">/// some platforms only expose inherently unsafe non-threadsafe APIs for</span>
<span class="doccomment">/// inspecting the environment. As a result extra care needs to be taken when</span>
<span class="doccomment">/// auditing calls to unsafe external FFI functions to ensure that any external</span>
<span class="doccomment">/// environment accesses are properly synchronized with accesses in Rust.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Discussion of this unsafety on Unix may be found in:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - [Austin Group Bugzilla](http://austingroupbugs.net/view.php?id=188)</span>
<span class="doccomment">/// - [GNU C library Bugzilla](https://sourceware.org/bugzilla/show_bug.cgi?id=15607#c2)</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This function may panic if `key` is empty, contains an ASCII equals sign</span>
<span class="doccomment">/// `'='` or the NUL character `'\0'`, or when the value contains the NUL</span>
<span class="doccomment">/// character.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let key = "KEY";</span>
<span class="doccomment">/// env::set_var(key, "VALUE");</span>
<span class="doccomment">/// assert_eq!(env::var(key), Ok("VALUE".to_string()));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// env::remove_var(key);</span>
<span class="doccomment">/// assert!(env::var(key).is_err());</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">remove_var</span><span class="op"><</span><span class="ident">K</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">OsStr</span><span class="op">>></span>(<span class="ident">k</span>: <span class="ident">K</span>) {
<span class="ident">_remove_var</span>(<span class="ident">k</span>.<span class="ident">as_ref</span>())
}
<span class="kw">fn</span> <span class="ident">_remove_var</span>(<span class="ident">k</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>) {
<span class="ident">os_imp</span>::<span class="ident">unsetenv</span>(<span class="ident">k</span>).<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="string">"failed to remove environment variable `{:?}`: {}"</span>, <span class="ident">k</span>, <span class="ident">e</span>)
})
}
<span class="doccomment">/// An iterator that splits an environment variable into paths according to</span>
<span class="doccomment">/// platform-specific conventions.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This structure is created by the [`std::env::split_paths`] function See its</span>
<span class="doccomment">/// documentation for more.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`std::env::split_paths`]: fn.split_paths.html</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SplitPaths</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { <span class="ident">inner</span>: <span class="ident">os_imp</span>::<span class="ident">SplitPaths</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> }
<span class="doccomment">/// Parses input according to platform conventions for the `PATH`</span>
<span class="doccomment">/// environment variable.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns an iterator over the paths contained in `unparsed`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let key = "PATH";</span>
<span class="doccomment">/// match env::var_os(key) {</span>
<span class="doccomment">/// Some(paths) => {</span>
<span class="doccomment">/// for path in env::split_paths(&paths) {</span>
<span class="doccomment">/// println!("'{}'", path.display());</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// None => println!("{} is not defined in the environment.", key)</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">split_paths</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">OsStr</span><span class="op">></span> <span class="op">+</span> <span class="question-mark">?</span><span class="ident">Sized</span><span class="op">></span>(<span class="ident">unparsed</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="ident">SplitPaths</span> {
<span class="ident">SplitPaths</span> { <span class="ident">inner</span>: <span class="ident">os_imp</span>::<span class="ident">split_paths</span>(<span class="ident">unparsed</span>.<span class="ident">as_ref</span>()) }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SplitPaths</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">PathBuf</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next</span>() }
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">size_hint</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">SplitPaths</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">pad</span>(<span class="string">"SplitPaths { .. }"</span>)
}
}
<span class="doccomment">/// The error type for operations on the `PATH` variable. Possibly returned from</span>
<span class="doccomment">/// the [`env::join_paths`] function.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`env::join_paths`]: fn.join_paths.html</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">JoinPathsError</span> {
<span class="ident">inner</span>: <span class="ident">os_imp</span>::<span class="ident">JoinPathsError</span>
}
<span class="doccomment">/// Joins a collection of [`Path`]s appropriately for the `PATH`</span>
<span class="doccomment">/// environment variable.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Errors</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns an [`Err`][err] (containing an error message) if one of the input</span>
<span class="doccomment">/// [`Path`]s contains an invalid character for constructing the `PATH`</span>
<span class="doccomment">/// variable (a double quote on Windows or a colon on Unix).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`Path`]: ../../std/path/struct.Path.html</span>
<span class="doccomment">/// [`OsString`]: ../../std/ffi/struct.OsString.html</span>
<span class="doccomment">/// [err]: ../../std/result/enum.Result.html#variant.Err</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">/// use std::path::PathBuf;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// if let Some(path) = env::var_os("PATH") {</span>
<span class="doccomment">/// let mut paths = env::split_paths(&path).collect::<Vec<_>>();</span>
<span class="doccomment">/// paths.push(PathBuf::from("/home/xyz/bin"));</span>
<span class="doccomment">/// let new_path = env::join_paths(paths).unwrap();</span>
<span class="doccomment">/// env::set_var("PATH", &new_path);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">join_paths</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">T</span><span class="op">></span>(<span class="ident">paths</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">OsString</span>, <span class="ident">JoinPathsError</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">T</span><span class="op">></span>, <span class="ident">T</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">OsStr</span><span class="op">></span>
{
<span class="ident">os_imp</span>::<span class="ident">join_paths</span>(<span class="ident">paths</span>.<span class="ident">into_iter</span>()).<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> {
<span class="ident">JoinPathsError</span> { <span class="ident">inner</span>: <span class="ident">e</span> }
})
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">JoinPathsError</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">fmt</span>(<span class="ident">f</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">Error</span> <span class="kw">for</span> <span class="ident">JoinPathsError</span> {
<span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">str</span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">description</span>() }
}
<span class="doccomment">/// Returns the path of the current user's home directory if known.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Unix</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns the value of the 'HOME' environment variable if it is set</span>
<span class="doccomment">/// and not equal to the empty string. Otherwise, it tries to determine the</span>
<span class="doccomment">/// home directory by invoking the `getpwuid_r` function on the UID of the</span>
<span class="doccomment">/// current user.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Windows</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns the value of the 'HOME' environment variable if it is</span>
<span class="doccomment">/// set and not equal to the empty string. Otherwise, returns the value of the</span>
<span class="doccomment">/// 'USERPROFILE' environment variable if it is set and not equal to the empty</span>
<span class="doccomment">/// string. If both do not exist, [`GetUserProfileDirectory`][msdn] is used to</span>
<span class="doccomment">/// return the appropriate path.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [msdn]: https://msdn.microsoft.com/en-us/library/windows/desktop/bb762280(v=vs.85).aspx</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// match env::home_dir() {</span>
<span class="doccomment">/// Some(path) => println!("{}", path.display()),</span>
<span class="doccomment">/// None => println!("Impossible to get your home dir!"),</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">home_dir</span>() <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> {
<span class="ident">os_imp</span>::<span class="ident">home_dir</span>()
}
<span class="doccomment">/// Returns the path of a temporary directory.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Unix</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns the value of the `TMPDIR` environment variable if it is</span>
<span class="doccomment">/// set, otherwise for non-Android it returns `/tmp`. If Android, since there</span>
<span class="doccomment">/// is no global temporary folder (it is usually allocated per-app), it returns</span>
<span class="doccomment">/// `/data/local/tmp`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Windows</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns the value of, in order, the `TMP`, `TEMP`,</span>
<span class="doccomment">/// `USERPROFILE` environment variable if any are set and not the empty</span>
<span class="doccomment">/// string. Otherwise, `temp_dir` returns the path of the Windows directory.</span>
<span class="doccomment">/// This behavior is identical to that of [`GetTempPath`][msdn], which this</span>
<span class="doccomment">/// function uses internally.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [msdn]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa364992(v=vs.85).aspx</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">/// use std::fs::File;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # fn foo() -> std::io::Result<()> {</span>
<span class="doccomment">/// let mut dir = env::temp_dir();</span>
<span class="doccomment">/// dir.push("foo.txt");</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let f = File::create(dir)?;</span>
<span class="doccomment">/// # Ok(())</span>
<span class="doccomment">/// # }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">temp_dir</span>() <span class="op">-></span> <span class="ident">PathBuf</span> {
<span class="ident">os_imp</span>::<span class="ident">temp_dir</span>()
}
<span class="doccomment">/// Returns the full filesystem path of the current running executable.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The path returned is not necessarily a "real path" of the executable as</span>
<span class="doccomment">/// there may be intermediate symlinks.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Errors</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Acquiring the path of the current executable is a platform-specific operation</span>
<span class="doccomment">/// that can fail for a good number of reasons. Some errors can include, but not</span>
<span class="doccomment">/// be limited to, filesystem operations failing or general syscall failures.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Security</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The output of this function should not be used in anything that might have</span>
<span class="doccomment">/// security implications. For example:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// fn main() {</span>
<span class="doccomment">/// println!("{:?}", std::env::current_exe());</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// On Linux systems, if this is compiled as `foo`:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```bash</span>
<span class="doccomment">/// $ rustc foo.rs</span>
<span class="doccomment">/// $ ./foo</span>
<span class="doccomment">/// Ok("/home/alex/foo")</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// And you make a symbolic link of the program:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```bash</span>
<span class="doccomment">/// $ ln foo bar</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// When you run it, you won't get the original executable, you'll get the</span>
<span class="doccomment">/// symlink:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```bash</span>
<span class="doccomment">/// $ ./bar</span>
<span class="doccomment">/// Ok("/home/alex/bar")</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This sort of behavior has been known to [lead to privilege escalation] when</span>
<span class="doccomment">/// used incorrectly, for example.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [lead to privilege escalation]: http://securityvulns.com/Wdocument183.html</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// match env::current_exe() {</span>
<span class="doccomment">/// Ok(exe_path) => println!("Path of this executable is: {}",</span>
<span class="doccomment">/// exe_path.display()),</span>
<span class="doccomment">/// Err(e) => println!("failed to get current exe path: {}", e),</span>
<span class="doccomment">/// };</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> {
<span class="ident">os_imp</span>::<span class="ident">current_exe</span>()
}
<span class="doccomment">/// An iterator over the arguments of a process, yielding a [`String`] value</span>
<span class="doccomment">/// for each argument.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This structure is created through the [`std::env::args`] function.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The first element is traditionally the path of the executable, but it can be</span>
<span class="doccomment">/// set to arbitrary text, and may not even exist. This means this property should</span>
<span class="doccomment">/// not be relied upon for security purposes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`String`]: ../string/struct.String.html</span>
<span class="doccomment">/// [`std::env::args`]: ./fn.args.html</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Args</span> { <span class="ident">inner</span>: <span class="ident">ArgsOs</span> }
<span class="doccomment">/// An iterator over the arguments of a process, yielding an [`OsString`] value</span>
<span class="doccomment">/// for each argument.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This structure is created through the [`std::env::args_os`] function.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The first element is traditionally the path of the executable, but it can be</span>
<span class="doccomment">/// set to arbitrary text, and may not even exist. This means this property should</span>
<span class="doccomment">/// not be relied upon for security purposes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`OsString`]: ../ffi/struct.OsString.html</span>
<span class="doccomment">/// [`std::env::args_os`]: ./fn.args_os.html</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ArgsOs</span> { <span class="ident">inner</span>: <span class="ident">sys</span>::<span class="ident">args</span>::<span class="ident">Args</span> }
<span class="doccomment">/// Returns the arguments which this program was started with (normally passed</span>
<span class="doccomment">/// via the command line).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The first element is traditionally the path of the executable, but it can be</span>
<span class="doccomment">/// set to arbitrary text, and may not even exist. This means this property should</span>
<span class="doccomment">/// not be relied upon for security purposes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Panics</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The returned iterator will panic during iteration if any argument to the</span>
<span class="doccomment">/// process is not valid unicode. If this is not desired,</span>
<span class="doccomment">/// use the [`args_os`] function instead.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Prints each argument on a separate line</span>
<span class="doccomment">/// for argument in env::args() {</span>
<span class="doccomment">/// println!("{}", argument);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`args_os`]: ./fn.args_os.html</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">args</span>() <span class="op">-></span> <span class="ident">Args</span> {
<span class="ident">Args</span> { <span class="ident">inner</span>: <span class="ident">args_os</span>() }
}
<span class="doccomment">/// Returns the arguments which this program was started with (normally passed</span>
<span class="doccomment">/// via the command line).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The first element is traditionally the path of the executable, but it can be</span>
<span class="doccomment">/// set to arbitrary text, and it may not even exist, so this property should</span>
<span class="doccomment">/// not be relied upon for security purposes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::env;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// // Prints each argument on a separate line</span>
<span class="doccomment">/// for argument in env::args_os() {</span>
<span class="doccomment">/// println!("{:?}", argument);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">args_os</span>() <span class="op">-></span> <span class="ident">ArgsOs</span> {
<span class="ident">ArgsOs</span> { <span class="ident">inner</span>: <span class="ident">sys</span>::<span class="ident">args</span>::<span class="ident">args</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Args</span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">String</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">s</span>.<span class="ident">into_string</span>().<span class="ident">unwrap</span>())
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">size_hint</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">Args</span> {
<span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">len</span>() }
<span class="kw">fn</span> <span class="ident">is_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">is_empty</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env_iterators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.12.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">Args</span> {
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next_back</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">s</span>.<span class="ident">into_string</span>().<span class="ident">unwrap</span>())
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Args</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">pad</span>(<span class="string">"Args { .. }"</span>)
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">ArgsOs</span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">OsString</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next</span>() }
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">size_hint</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">ArgsOs</span> {
<span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">len</span>() }
<span class="kw">fn</span> <span class="ident">is_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">is_empty</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env_iterators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.12.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">ArgsOs</span> {
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next_back</span>() }
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"std_debug"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span>
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">ArgsOs</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">pad</span>(<span class="string">"ArgsOs { .. }"</span>)
}
}
<span class="doccomment">/// Constants associated with the current target</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">consts</span> {
<span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">env</span>::<span class="ident">os</span>;
<span class="doccomment">/// A string describing the architecture of the CPU that is currently</span>
<span class="doccomment">/// in use.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Some possible values:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - x86</span>
<span class="doccomment">/// - x86_64</span>
<span class="doccomment">/// - arm</span>
<span class="doccomment">/// - aarch64</span>
<span class="doccomment">/// - mips</span>
<span class="doccomment">/// - mips64</span>
<span class="doccomment">/// - powerpc</span>
<span class="doccomment">/// - powerpc64</span>
<span class="doccomment">/// - s390x</span>
<span class="doccomment">/// - sparc64</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="kw">super</span>::<span class="ident">arch</span>::<span class="ident">ARCH</span>;
<span class="doccomment">/// The family of the operating system. Example value is `unix`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Some possible values:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - unix</span>
<span class="doccomment">/// - windows</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">FAMILY</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="ident">os</span>::<span class="ident">FAMILY</span>;
<span class="doccomment">/// A string describing the specific operating system in use.</span>
<span class="doccomment">/// Example value is `linux`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Some possible values:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - linux</span>
<span class="doccomment">/// - macos</span>
<span class="doccomment">/// - ios</span>
<span class="doccomment">/// - freebsd</span>
<span class="doccomment">/// - dragonfly</span>
<span class="doccomment">/// - bitrig</span>
<span class="doccomment">/// - netbsd</span>
<span class="doccomment">/// - openbsd</span>
<span class="doccomment">/// - solaris</span>
<span class="doccomment">/// - android</span>
<span class="doccomment">/// - windows</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">OS</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="ident">os</span>::<span class="ident">OS</span>;
<span class="doccomment">/// Specifies the filename prefix used for shared libraries on this</span>
<span class="doccomment">/// platform. Example value is `lib`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Some possible values:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - lib</span>
<span class="doccomment">/// - `""` (an empty string)</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">DLL_PREFIX</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="ident">os</span>::<span class="ident">DLL_PREFIX</span>;
<span class="doccomment">/// Specifies the filename suffix used for shared libraries on this</span>
<span class="doccomment">/// platform. Example value is `.so`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Some possible values:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - .so</span>
<span class="doccomment">/// - .dylib</span>
<span class="doccomment">/// - .dll</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">DLL_SUFFIX</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="ident">os</span>::<span class="ident">DLL_SUFFIX</span>;
<span class="doccomment">/// Specifies the file extension used for shared libraries on this</span>
<span class="doccomment">/// platform that goes after the dot. Example value is `so`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Some possible values:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - so</span>
<span class="doccomment">/// - dylib</span>
<span class="doccomment">/// - dll</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">DLL_EXTENSION</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="ident">os</span>::<span class="ident">DLL_EXTENSION</span>;
<span class="doccomment">/// Specifies the filename suffix used for executable binaries on this</span>
<span class="doccomment">/// platform. Example value is `.exe`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Some possible values:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - .exe</span>
<span class="doccomment">/// - .nexe</span>
<span class="doccomment">/// - .pexe</span>
<span class="doccomment">/// - `""` (an empty string)</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">EXE_SUFFIX</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="ident">os</span>::<span class="ident">EXE_SUFFIX</span>;
<span class="doccomment">/// Specifies the file extension, if any, used for executable binaries</span>
<span class="doccomment">/// on this platform. Example value is `exe`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Some possible values:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// - exe</span>
<span class="doccomment">/// - `""` (an empty string)</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"env"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">EXE_EXTENSION</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="ident">os</span>::<span class="ident">EXE_EXTENSION</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"x86"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86_64"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"x86_64"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"arm"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"arm"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"aarch64"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"mips"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"mips"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"mips64"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"mips64"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"powerpc"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"powerpc"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"powerpc64"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"powerpc64"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"s390x"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"s390x"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"sparc64"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"sparc64"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"le32"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"le32"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"asmjs"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"asmjs"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"wasm32"</span>)]</span>
<span class="kw">mod</span> <span class="ident">arch</span> {
<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ARCH</span>: <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> <span class="op">=</span> <span class="string">"wasm32"</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="kw">mod</span> <span class="ident">tests</span> {
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">iter</span>::<span class="ident">repeat</span>;
<span class="kw">use</span> <span class="ident">rand</span>::{<span class="self">self</span>, <span class="ident">Rng</span>};
<span class="kw">use</span> <span class="ident">ffi</span>::{<span class="ident">OsString</span>, <span class="ident">OsStr</span>};
<span class="kw">use</span> <span class="ident">path</span>::{<span class="ident">Path</span>, <span class="ident">PathBuf</span>};
<span class="kw">fn</span> <span class="ident">make_rand_name</span>() <span class="op">-></span> <span class="ident">OsString</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rng</span> <span class="op">=</span> <span class="ident">rand</span>::<span class="ident">thread_rng</span>();
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"TEST{}"</span>, <span class="ident">rng</span>.<span class="ident">gen_ascii_chars</span>().<span class="ident">take</span>(<span class="number">10</span>)
.<span class="ident">collect</span>::<span class="op"><</span><span class="ident">String</span><span class="op">></span>());
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">OsString</span>::<span class="ident">from</span>(<span class="ident">n</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">var_os</span>(<span class="kw-2">&</span><span class="ident">n</span>).<span class="ident">is_none</span>());
<span class="ident">n</span>
}
<span class="kw">fn</span> <span class="ident">eq</span>(<span class="ident">a</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span>, <span class="ident">b</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span><span class="op">></span>) {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">a</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">s</span>), <span class="ident">b</span>.<span class="ident">map</span>(<span class="ident">OsStr</span>::<span class="ident">new</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">s</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_set_var</span>() {
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">make_rand_name</span>();
<span class="ident">set_var</span>(<span class="kw-2">&</span><span class="ident">n</span>, <span class="string">"VALUE"</span>);
<span class="ident">eq</span>(<span class="ident">var_os</span>(<span class="kw-2">&</span><span class="ident">n</span>), <span class="prelude-val">Some</span>(<span class="string">"VALUE"</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_remove_var</span>() {
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">make_rand_name</span>();
<span class="ident">set_var</span>(<span class="kw-2">&</span><span class="ident">n</span>, <span class="string">"VALUE"</span>);
<span class="ident">remove_var</span>(<span class="kw-2">&</span><span class="ident">n</span>);
<span class="ident">eq</span>(<span class="ident">var_os</span>(<span class="kw-2">&</span><span class="ident">n</span>), <span class="prelude-val">None</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_set_var_overwrite</span>() {
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">make_rand_name</span>();
<span class="ident">set_var</span>(<span class="kw-2">&</span><span class="ident">n</span>, <span class="string">"1"</span>);
<span class="ident">set_var</span>(<span class="kw-2">&</span><span class="ident">n</span>, <span class="string">"2"</span>);
<span class="ident">eq</span>(<span class="ident">var_os</span>(<span class="kw-2">&</span><span class="ident">n</span>), <span class="prelude-val">Some</span>(<span class="string">"2"</span>));
<span class="ident">set_var</span>(<span class="kw-2">&</span><span class="ident">n</span>, <span class="string">""</span>);
<span class="ident">eq</span>(<span class="ident">var_os</span>(<span class="kw-2">&</span><span class="ident">n</span>), <span class="prelude-val">Some</span>(<span class="string">""</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>, <span class="ident">ignore</span>)]</span>
<span class="kw">fn</span> <span class="ident">test_var_big</span>() {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s</span> <span class="op">=</span> <span class="string">""</span>.<span class="ident">to_string</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">i</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">while</span> <span class="ident">i</span> <span class="op"><</span> <span class="number">100</span> {
<span class="ident">s</span>.<span class="ident">push_str</span>(<span class="string">"aaaaaaaaaa"</span>);
<span class="ident">i</span> <span class="op">+=</span> <span class="number">1</span>;
}
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">make_rand_name</span>();
<span class="ident">set_var</span>(<span class="kw-2">&</span><span class="ident">n</span>, <span class="kw-2">&</span><span class="ident">s</span>);
<span class="ident">eq</span>(<span class="ident">var_os</span>(<span class="kw-2">&</span><span class="ident">n</span>), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="ident">s</span>));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>, <span class="ident">ignore</span>)]</span>
<span class="kw">fn</span> <span class="ident">test_self_exe_path</span>() {
<span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">current_exe</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">path</span>.<span class="ident">is_ok</span>());
<span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">path</span>.<span class="ident">unwrap</span>();
<span class="comment">// Hard to test this function</span>
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">path</span>.<span class="ident">is_absolute</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>, <span class="ident">ignore</span>)]</span>
<span class="kw">fn</span> <span class="ident">test_env_set_get_huge</span>() {
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">make_rand_name</span>();
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">repeat</span>(<span class="string">"x"</span>).<span class="ident">take</span>(<span class="number">10000</span>).<span class="ident">collect</span>::<span class="op"><</span><span class="ident">String</span><span class="op">></span>();
<span class="ident">set_var</span>(<span class="kw-2">&</span><span class="ident">n</span>, <span class="kw-2">&</span><span class="ident">s</span>);
<span class="ident">eq</span>(<span class="ident">var_os</span>(<span class="kw-2">&</span><span class="ident">n</span>), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="ident">s</span>));
<span class="ident">remove_var</span>(<span class="kw-2">&</span><span class="ident">n</span>);
<span class="ident">eq</span>(<span class="ident">var_os</span>(<span class="kw-2">&</span><span class="ident">n</span>), <span class="prelude-val">None</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_env_set_var</span>() {
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">make_rand_name</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">e</span> <span class="op">=</span> <span class="ident">vars_os</span>();
<span class="ident">set_var</span>(<span class="kw-2">&</span><span class="ident">n</span>, <span class="string">"VALUE"</span>);
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">e</span>.<span class="ident">any</span>(<span class="op">|</span>(<span class="ident">k</span>, <span class="ident">v</span>)<span class="op">|</span> {
<span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">k</span> <span class="op">==</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">n</span> <span class="op">&&</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">v</span> <span class="op">==</span> <span class="string">"VALUE"</span>
}));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">vars_os</span>().<span class="ident">any</span>(<span class="op">|</span>(<span class="ident">k</span>, <span class="ident">v</span>)<span class="op">|</span> {
<span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">k</span> <span class="op">==</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">n</span> <span class="op">&&</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">v</span> <span class="op">==</span> <span class="string">"VALUE"</span>
}));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test</span>() {
<span class="macro">assert</span><span class="macro">!</span>((<span class="op">!</span><span class="ident">Path</span>::<span class="ident">new</span>(<span class="string">"test-path"</span>).<span class="ident">is_absolute</span>()));
<span class="ident">current_dir</span>().<span class="ident">unwrap</span>();
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">windows</span>)]</span>
<span class="kw">fn</span> <span class="ident">split_paths_windows</span>() {
<span class="kw">fn</span> <span class="ident">check_parse</span>(<span class="ident">unparsed</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">parsed</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">str</span>]) <span class="op">-></span> <span class="ident">bool</span> {
<span class="ident">split_paths</span>(<span class="ident">unparsed</span>).<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span>_<span class="op">>></span>() <span class="op">==</span>
<span class="ident">parsed</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="kw-2">*</span><span class="ident">s</span>)).<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span>_<span class="op">>></span>()
}
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">""</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">""</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">r#""""#</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">""</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">";;"</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">""</span>, <span class="string">""</span>, <span class="string">""</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">r"c:\"</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">r"c:\"</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">r"c:\;"</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">r"c:\"</span>, <span class="string">""</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">r"c:\;c:\Program Files\"</span>,
<span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">r"c:\"</span>, <span class="string">r"c:\Program Files\"</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">r#"c:\;c:\"foo"\"#</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">r"c:\"</span>, <span class="string">r"c:\foo\"</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">r#"c:\;c:\"foo;bar"\;c:\baz"#</span>,
<span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">r"c:\"</span>, <span class="string">r"c:\foo;bar\"</span>, <span class="string">r"c:\baz"</span>]));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">unix</span>)]</span>
<span class="kw">fn</span> <span class="ident">split_paths_unix</span>() {
<span class="kw">fn</span> <span class="ident">check_parse</span>(<span class="ident">unparsed</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">parsed</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">str</span>]) <span class="op">-></span> <span class="ident">bool</span> {
<span class="ident">split_paths</span>(<span class="ident">unparsed</span>).<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span>_<span class="op">>></span>() <span class="op">==</span>
<span class="ident">parsed</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="kw-2">*</span><span class="ident">s</span>)).<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span>_<span class="op">>></span>()
}
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">""</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">""</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">"::"</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">""</span>, <span class="string">""</span>, <span class="string">""</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">"/"</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">"/"</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">"/:"</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">"/"</span>, <span class="string">""</span>]));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">check_parse</span>(<span class="string">"/:/usr/local"</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="string">"/"</span>, <span class="string">"/usr/local"</span>]));
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">unix</span>)]</span>
<span class="kw">fn</span> <span class="ident">join_paths_unix</span>() {
<span class="kw">fn</span> <span class="ident">test_eq</span>(<span class="ident">input</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">str</span>], <span class="ident">output</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">join_paths</span>(<span class="ident">input</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>()).<span class="ident">unwrap</span>() <span class="op">==</span>
<span class="ident">OsStr</span>::<span class="ident">new</span>(<span class="ident">output</span>)
}
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">test_eq</span>(<span class="kw-2">&</span>[], <span class="string">""</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">test_eq</span>(<span class="kw-2">&</span>[<span class="string">"/bin"</span>, <span class="string">"/usr/bin"</span>, <span class="string">"/usr/local/bin"</span>],
<span class="string">"/bin:/usr/bin:/usr/local/bin"</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">test_eq</span>(<span class="kw-2">&</span>[<span class="string">""</span>, <span class="string">"/bin"</span>, <span class="string">""</span>, <span class="string">""</span>, <span class="string">"/usr/bin"</span>, <span class="string">""</span>],
<span class="string">":/bin:::/usr/bin:"</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">join_paths</span>([<span class="string">"/te:st"</span>].<span class="ident">iter</span>().<span class="ident">cloned</span>()).<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">windows</span>)]</span>
<span class="kw">fn</span> <span class="ident">join_paths_windows</span>() {
<span class="kw">fn</span> <span class="ident">test_eq</span>(<span class="ident">input</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">str</span>], <span class="ident">output</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">join_paths</span>(<span class="ident">input</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>()).<span class="ident">unwrap</span>() <span class="op">==</span>
<span class="ident">OsStr</span>::<span class="ident">new</span>(<span class="ident">output</span>)
}
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">test_eq</span>(<span class="kw-2">&</span>[], <span class="string">""</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">test_eq</span>(<span class="kw-2">&</span>[<span class="string">r"c:\windows"</span>, <span class="string">r"c:\"</span>],
<span class="string">r"c:\windows;c:\"</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">test_eq</span>(<span class="kw-2">&</span>[<span class="string">""</span>, <span class="string">r"c:\windows"</span>, <span class="string">""</span>, <span class="string">""</span>, <span class="string">r"c:\"</span>, <span class="string">""</span>],
<span class="string">r";c:\windows;;;c:\;"</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">test_eq</span>(<span class="kw-2">&</span>[<span class="string">r"c:\te;st"</span>, <span class="string">r"c:\"</span>],
<span class="string">r#""c:\te;st";c:\"#</span>));
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">join_paths</span>([<span class="string">r#"c:\te"st"#</span>].<span class="ident">iter</span>().<span class="ident">cloned</span>()).<span class="ident">is_err</span>());
}
}
</pre>
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