Add more from the std

library/std/src/sys/env/mod.rs

@@ -0,0 +1,62 @@
+//! Platform-dependent environment variables abstraction.
+
+#![forbid(unsafe_op_in_unsafe_fn)]
+
+#[cfg(any(
+    target_family = "unix",
+    target_os = "hermit",
+    target_os = "motor",
+    all(target_vendor = "fortanix", target_env = "sgx"),
+    target_os = "solid_asp3",
+    target_os = "uefi",
+    target_os = "wasi",
+    target_os = "xous",
+))]
+mod common;
+
+cfg_select! {
+    target_family = "unix" => {
+        mod unix;
+        pub use unix::*;
+    }
+    target_family = "windows" => {
+        mod windows;
+        pub use windows::*;
+    }
+    target_os = "hermit" => {
+        mod hermit;
+        pub use hermit::*;
+    }
+    target_os = "motor" => {
+        mod motor;
+        pub use motor::*;
+    }
+    all(target_vendor = "fortanix", target_env = "sgx") => {
+        mod sgx;
+        pub use sgx::*;
+    }
+    target_os = "solid_asp3" => {
+        mod solid;
+        pub use solid::*;
+    }
+    target_os = "uefi" => {
+        mod uefi;
+        pub use uefi::*;
+    }
+    target_os = "wasi" => {
+        mod wasi;
+        pub use wasi::*;
+    }
+    target_os = "xous" => {
+        mod xous;
+        pub use xous::*;
+    }
+    target_os = "zkvm" => {
+        mod zkvm;
+        pub use zkvm::*;
+    }
+    _ => {
+        mod unsupported;
+        pub use unsupported::*;
+    }
+}