From bc90f0d718f8eda2bbb91c655b7db5d09f269d25 Mon Sep 17 00:00:00 2001
From: oech3 <79379754+oech3@users.noreply.github.com>
Date: Thu, 16 Jul 2026 09:59:02 +0900
Subject: [PATCH] split: allow writing to symlink to nonseekable

---
 src/uu/split/src/platform/unix.rs |  7 +++++--
 tests/by-util/test_split.rs       | 12 ++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/uu/split/src/platform/unix.rs b/src/uu/split/src/platform/unix.rs
index ebba18fd77a..dd9798539a9 100644
--- a/src/uu/split/src/platform/unix.rs
+++ b/src/uu/split/src/platform/unix.rs
@@ -186,8 +186,11 @@ fn create_or_truncate_output_file(input: &OsStr, filename: &OsStr) -> Result<std
                 ));
             }
 
-            file.set_len(0).map_err(|e| open_file_error(filename, e))?;
-            Ok(file)
+            match file.set_len(0) {
+                // allow writing to symlink to nonseekable
+                Err(e) if e.kind() != ErrorKind::InvalidInput => Err(open_file_error(filename, e)),
+                _ => Ok(file),
+            }
         }
         Err(e) => Err(open_file_error(filename, e)),
     }
diff --git a/tests/by-util/test_split.rs b/tests/by-util/test_split.rs
index ffe256100fe..a9e36f2c5a5 100644
--- a/tests/by-util/test_split.rs
+++ b/tests/by-util/test_split.rs
@@ -132,6 +132,18 @@ fn test_invalid_arg() {
     new_ucmd!().arg("--definitely-invalid").fails_with_code(1);
 }
 
+#[test]
+#[cfg(target_os = "linux")]
+fn test_split_to_non_seekable() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.symlink_file("/dev/stdout", "xaa");
+
+    ucmd.args(&["-"])
+        .pipe_in("string")
+        .succeeds()
+        .stdout_is("string");
+}
+
 #[test]
 fn test_split_non_existing_file() {
     new_ucmd!()