From be1d0ad0b4683bf10c2491518a60868cb3b077cc Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Tue, 29 Aug 2023 19:45:37 +0000
Subject: [PATCH] Add GNU/Hurd support

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
---
 .github/workflows/tests.yml | 2 ++
 src/lib.rs                  | 3 ++-
 src/use_file.rs             | 1 +
 src/util_libc.rs            | 2 +-
 4 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 13fe973f..02769ae7 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -303,6 +303,8 @@ jobs:
           # `std` support still in progress. Can be moved up with the other
           # apple targets after https://github.com/rust-lang/rust/pull/103503
           aarch64-apple-tvos,
+          # `std` support being commited, see https://github.com/rust-lang/rust/pull/116527
+          i686-unknown-hurd-gnu,
         ]
         include:
           # Supported tier 3 targets with libstd support
diff --git a/src/lib.rs b/src/lib.rs
index fbfe7295..17fb62e2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -25,6 +25,7 @@
 //! | Redox             | `*‑redox`          | `/dev/urandom`
 //! | Haiku             | `*‑haiku`          | `/dev/urandom` (identical to `/dev/random`)
 //! | Hermit            | `*-hermit`         | [`sys_read_entropy`]
+//! | Hurd              | `*-hurd-gnu`       | `/dev/urandom`
 //! | SGX               | `x86_64‑*‑sgx`     | [`RDRAND`]
 //! | VxWorks           | `*‑wrs‑vxworks‑*`  | `randABytes` after checking entropy pool initialization with `randSecure`
 //! | ESP-IDF           | `*‑espidf`         | [`esp_fill_random`]
@@ -216,7 +217,7 @@ pub use crate::error::Error;
 // The function MUST NOT ever write uninitialized bytes into `dest`,
 // regardless of what value it returns.
 cfg_if! {
-    if #[cfg(any(target_os = "haiku", target_os = "redox", target_os = "nto", target_os = "aix"))] {
+    if #[cfg(any(target_os = "haiku", target_os = "hurd", target_os = "redox", target_os = "nto", target_os = "aix"))] {
         mod util_libc;
         #[path = "use_file.rs"] mod imp;
     } else if #[cfg(any(target_os = "android", target_os = "linux"))] {
diff --git a/src/use_file.rs b/src/use_file.rs
index a6ef0d23..d867aa97 100644
--- a/src/use_file.rs
+++ b/src/use_file.rs
@@ -31,6 +31,7 @@ const FILE_PATH: &str = "/dev/random\0";
     target_os = "redox",
     target_os = "dragonfly",
     target_os = "haiku",
+    target_os = "hurd",
     target_os = "macos",
     target_os = "nto",
 ))]
diff --git a/src/util_libc.rs b/src/util_libc.rs
index 4b94144d..99bee382 100644
--- a/src/util_libc.rs
+++ b/src/util_libc.rs
@@ -19,7 +19,7 @@ use libc::c_void;
 cfg_if! {
     if #[cfg(any(target_os = "netbsd", target_os = "openbsd", target_os = "android"))] {
         use libc::__errno as errno_location;
-    } else if #[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "redox"))] {
+    } else if #[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "hurd", target_os = "redox"))] {
         use libc::__errno_location as errno_location;
     } else if #[cfg(any(target_os = "solaris", target_os = "illumos"))] {
         use libc::___errno as errno_location;