From f80d0764b56d3017c1ba558ee33fa7e794484b5f Mon Sep 17 00:00:00 2001
From: LoveSy <shana@zju.edu.cn>
Date: Thu, 1 Feb 2024 23:35:42 +0800
Subject: [PATCH] Use rustix for `setgroups` (#1334)

---
 userspace/ksud/src/ksu.rs | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/userspace/ksud/src/ksu.rs b/userspace/ksud/src/ksu.rs
index 29042a388ad1..c4b8fcd82d11 100644
--- a/userspace/ksud/src/ksu.rs
+++ b/userspace/ksud/src/ksu.rs
@@ -1,4 +1,5 @@
 use anyhow::{Ok, Result};
+use core::slice::SlicePattern;
 use getopts::Options;
 use std::env;
 #[cfg(unix)]
@@ -38,14 +39,15 @@ fn print_usage(program: &str, opts: Options) {
 }
 
 fn set_identity(uid: u32, gid: u32, groups: &[u32]) {
-    #[cfg(any(target_os = "linux", target_os = "android"))]
-    unsafe {
-        if !groups.is_empty() {
-            libc::setgroups(groups.len(), groups.as_ptr());
-        }
-    }
     #[cfg(any(target_os = "linux", target_os = "android"))]
     {
+        rustix::process::set_groups(
+            groups
+                .iter()
+                .map(|g| unsafe { Gid::from_raw(*g) })
+                .collect::<Vec<_>>()
+                .as_slice(),
+        );
         let gid = unsafe { Gid::from_raw(gid) };
         let uid = unsafe { Uid::from_raw(uid) };
         set_thread_res_gid(gid, gid, gid).ok();