From f97d784f172a10e0444ad93bb536ee0428613aa7 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Tue, 8 Mar 2022 11:35:06 +0000
Subject: Use getpeerucred if available (not tested).

---
 compat/getpeereid.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'compat/getpeereid.c')

diff --git a/compat/getpeereid.c b/compat/getpeereid.c
index 722f14a2..5a593c07 100644
--- a/compat/getpeereid.c
+++ b/compat/getpeereid.c
@@ -19,6 +19,10 @@
 
 #include <stdio.h>
 
+#ifdef HAVE_UCRED_H
+#include <ucred.h>
+#endif
+
 #include "compat.h"
 
 int
@@ -33,6 +37,21 @@ getpeereid(int s, uid_t *uid, gid_t *gid)
 	*uid = uc.uid;
 	*gid = uc.gid;
 	return (0);
+#elif defined(HAVE_GETPEERUCRED)
+int
+getpeereid(int s, uid_t *uid, gid_t *gid)
+{
+        ucred_t *ucred = NULL;
+
+        if (getpeerucred(s, &ucred) == -1)
+                return (-1);
+        if ((*uid = ucred_geteuid(ucred)) == -1)
+                return (-1);
+        if ((*gid = ucred_getrgid(ucred)) == -1)
+                return (-1);
+        ucred_free(ucred);
+        return (0);
+}
 #else
 	errno = EOPNOTSUPP;
 	return (-1);
-- 
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