From ad99850aa9bdf9270c40a2d4c26ed0bc4b6c0778 Mon Sep 17 00:00:00 2001
From: oech3 <79379754+oech3@users.noreply.github.com>
Date: Mon, 14 Sep 2026 13:56:39 +0900
Subject: [PATCH] test_install.rs: add test case for eCryptfs

---
 tests/by-util/test_install.rs | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/tests/by-util/test_install.rs b/tests/by-util/test_install.rs
index 4d17d58d21..c50d62efe9 100644
--- a/tests/by-util/test_install.rs
+++ b/tests/by-util/test_install.rs
@@ -3161,3 +3161,31 @@ fn test_install_d_parallel_mkdir_race() {
         }
     }
 }
+
+#[test]
+#[cfg(target_os = "linux")]
+fn test_install_target_without_splice_support() {
+    // Does eCryptfs not support splice on some kernel?
+    use std::process::Command;
+    if Command::new("strace")
+        .args(["-e", "inject=splice:error=EINVAL:when=2", "true"])
+        .output()
+        .is_err()
+    {
+        return; // missing strace
+    }
+    let coreutils = uutests::util::get_tests_binary();
+    Command::new("strace")
+        .args([
+            "-e",
+            "inject=splice:error=EINVAL:when=2",
+            coreutils,
+            "install",
+            coreutils,
+            "target_file",
+        ])
+        .output()
+        .unwrap();
+    // properly copied with fallback from splice?
+    assert!(uucore::fs::are_files_identical(coreutils, "target_file").unwrap());
+}