From d3a2db415caaf2a2fbe43d9d4a9e4cab470657bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Teemu=20P=C3=A4tsi?=
 <44954973+frendsick@users.noreply.github.com>
Date: Sun, 4 May 2025 10:38:34 +0300
Subject: [PATCH] id: The `--real` flag should only affect `-u`, `-g`, and `-G`
 (#7796)

* id: The `--real` flag should only affect `-u`, `-g`, and `-U`

* id: Test output with different UID and EUID

* id: Simplify testing different UID and EUID

* id: Compile preload file for test using cc instead of gcc

* id: Remove test for different UID and EUID

The test is incompatible with some CI/CD targets.

This reverts the following commits:
- 8efcbf9adae59b7074d29b2ac8ff8a4083df7d95
- 208fa8e7f88f29214ef99984bf47c6a9ebc2ed0d
- a498a2722d7ab56ce96e7cab4766343930ea85ac
---
 src/uu/id/src/id.rs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/uu/id/src/id.rs b/src/uu/id/src/id.rs
index 4a91c8483..473bc3fec 100644
--- a/src/uu/id/src/id.rs
+++ b/src/uu/id/src/id.rs
@@ -238,10 +238,14 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
             return Ok(());
         }
 
-        let (uid, gid) = possible_pw.as_ref().map(|p| (p.uid, p.gid)).unwrap_or((
-            if state.rflag { getuid() } else { geteuid() },
-            if state.rflag { getgid() } else { getegid() },
-        ));
+        let (uid, gid) = possible_pw.as_ref().map(|p| (p.uid, p.gid)).unwrap_or({
+            let use_effective = !state.rflag && (state.uflag || state.gflag || state.gsflag);
+            if use_effective {
+                (geteuid(), getegid())
+            } else {
+                (getuid(), getgid())
+            }
+        });
         state.ids = Some(Ids {
             uid,
             gid,