From ee554456ed2a267a1b960c74913bb1e9f5666569 Mon Sep 17 00:00:00 2001
From: David Carlier <devnexen@gmail.com>
Date: Sat, 15 Feb 2025 23:02:09 +0000
Subject: [PATCH] adding SUN_LEN macro to linux glibc/musl

[glibc ref](https://github.com/bminor/glibc/blob/1b6f868625403d6b7683af840e87d2b18d5d7731/socket/sys/un.h#L41)
[musl ref](https://github.com/bminor/musl/blob/c47ad25ea3b484e10326f933e927c0bc8cded3da/include/sys/un.h#L24)
---
 libc-test/semver/linux-gnu.txt   |  1 +
 libc-test/semver/linux-musl.txt  |  1 +
 src/unix/linux_like/linux/mod.rs | 11 +++++++++++
 3 files changed, 13 insertions(+)

diff --git a/libc-test/semver/linux-gnu.txt b/libc-test/semver/linux-gnu.txt
index 9001de4c4ff3..28b087e4e491 100644
--- a/libc-test/semver/linux-gnu.txt
+++ b/libc-test/semver/linux-gnu.txt
@@ -448,6 +448,7 @@ STA_PPSTIME
 STA_PPSWANDER
 STA_RONLY
 STA_UNSYNC
+SUN_LEN
 ST_RELATIME
 SYSFS_MAGIC
 TCA_CHAIN
diff --git a/libc-test/semver/linux-musl.txt b/libc-test/semver/linux-musl.txt
index d8e4918facb1..39e09746ec91 100644
--- a/libc-test/semver/linux-musl.txt
+++ b/libc-test/semver/linux-musl.txt
@@ -36,6 +36,7 @@ RWF_DSYNC
 RWF_HIPRI
 RWF_NOWAIT
 RWF_SYNC
+SUN_LEN
 USER_PROCESS
 _CS_V6_ENV
 _CS_V7_ENV
diff --git a/src/unix/linux_like/linux/mod.rs b/src/unix/linux_like/linux/mod.rs
index 37b1e673b2e2..645a1640d1b4 100644
--- a/src/unix/linux_like/linux/mod.rs
+++ b/src/unix/linux_like/linux/mod.rs
@@ -6053,6 +6053,17 @@ f! {
     pub fn ELF64_R_INFO(sym: Elf64_Xword, t: Elf64_Xword) -> Elf64_Xword {
         sym << 32 + t
     }
+
+    #[cfg(target_env = "gnu")]
+    pub fn SUN_LEN(s: crate::sockaddr_un) -> usize {
+        core::mem::offset_of!(crate::sockaddr_un, sun_path) +
+            unsafe { crate::strlen(s.sun_path.as_ptr()) }
+    }
+
+    #[cfg(target_env = "musl")]
+    pub fn SUN_LEN(s: crate::sockaddr_un) -> usize {
+        2 * (unsafe { crate::strlen(s.sun_path.as_ptr()) })
+    }
 }
 
 safe_f! {