From 61bd3e2a8f0cefaef4799fd6049f264244752de6 Mon Sep 17 00:00:00 2001
From: Armin Ronacher <armin.ronacher@active-4.com>
Date: Wed, 11 Jan 2023 13:13:44 +0100
Subject: [PATCH 1/3] Added LOCAL_PEERPID/LocalPeerPid sockopt for macos

---
 src/sys/socket/sockopt.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/sys/socket/sockopt.rs b/src/sys/socket/sockopt.rs
index dd24208f31..cea623ae15 100644
--- a/src/sys/socket/sockopt.rs
+++ b/src/sys/socket/sockopt.rs
@@ -492,6 +492,15 @@ sockopt_impl!(
     libc::LOCAL_PEERCRED,
     super::XuCred
 );
+#[cfg(any(target_os = "macos"))]
+sockopt_impl!(
+    /// Get the PID of the peer process of a connected unix domain socket.
+    LocalPeerPid,
+    GetOnly,
+    0,
+    libc::LOCAL_PEERPID,
+    libc::c_int
+);
 #[cfg(any(target_os = "android", target_os = "linux"))]
 sockopt_impl!(
     /// Return the credentials of the foreign process connected to this socket.

From 34788b179b14b5c5c8e7bb7df168089fc854c499 Mon Sep 17 00:00:00 2001
From: Armin Ronacher <armin.ronacher@active-4.com>
Date: Sat, 14 Jan 2023 19:49:42 +0100
Subject: [PATCH 2/3] Added changelog entry and test for LocalPeerPid

---
 CHANGELOG.md             |  1 +
 test/sys/test_sockopt.rs | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f7da93bbf1..68edef38df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
   ([#1912](https://github.com/nix-rust/nix/pull/1912))
 - Added `mq_timedreceive` to `::nix::mqueue`.
   ([#1966])(https://github.com/nix-rust/nix/pull/1966)
+- Added `LocalPeerPid` to `nix::sys::socket::sockopt` for macOS. ([#1967](https://github.com/nix-rust/nix/pull/1967))
 
 ### Changed
 
diff --git a/test/sys/test_sockopt.rs b/test/sys/test_sockopt.rs
index 34bef945e1..bf791688d6 100644
--- a/test/sys/test_sockopt.rs
+++ b/test/sys/test_sockopt.rs
@@ -54,6 +54,22 @@ pub fn test_local_peercred_stream() {
     assert_eq!(Gid::from_raw(xucred.groups()[0]), Gid::current());
 }
 
+#[cfg(target_os = "macos")]
+#[test]
+pub fn test_local_peer_pid() {
+    use nix::sys::socket::socketpair;
+
+    let (fd1, _fd2) = socketpair(
+        AddressFamily::Unix,
+        SockType::Stream,
+        None,
+        SockFlag::empty(),
+    )
+    .unwrap();
+    let pid = getsockopt(fd1, sockopt::LocalPeerPid).unwrap();
+    assert_eq!(pid, std::process::id() as _);
+}
+
 #[cfg(target_os = "linux")]
 #[test]
 fn is_so_mark_functional() {

From 960199daf9f395096b08dc24aa0337cb5b93da81 Mon Sep 17 00:00:00 2001
From: Armin Ronacher <armin.ronacher@active-4.com>
Date: Sun, 15 Jan 2023 22:41:33 +0100
Subject: [PATCH 3/3] Try enabling LocalPeerPid for ios

---
 src/sys/socket/sockopt.rs | 2 +-
 test/sys/test_sockopt.rs  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/sys/socket/sockopt.rs b/src/sys/socket/sockopt.rs
index cea623ae15..9021664997 100644
--- a/src/sys/socket/sockopt.rs
+++ b/src/sys/socket/sockopt.rs
@@ -492,7 +492,7 @@ sockopt_impl!(
     libc::LOCAL_PEERCRED,
     super::XuCred
 );
-#[cfg(any(target_os = "macos"))]
+#[cfg(any(target_os = "macos", target_os = "ios"))]
 sockopt_impl!(
     /// Get the PID of the peer process of a connected unix domain socket.
     LocalPeerPid,
diff --git a/test/sys/test_sockopt.rs b/test/sys/test_sockopt.rs
index bf791688d6..a498bdfa2c 100644
--- a/test/sys/test_sockopt.rs
+++ b/test/sys/test_sockopt.rs
@@ -54,7 +54,7 @@ pub fn test_local_peercred_stream() {
     assert_eq!(Gid::from_raw(xucred.groups()[0]), Gid::current());
 }
 
-#[cfg(target_os = "macos")]
+#[cfg(any(target_os = "ios", target_os = "macos"))]
 #[test]
 pub fn test_local_peer_pid() {
     use nix::sys::socket::socketpair;