From 0553e255a6215a9623ff20daa385149787f89c92 Mon Sep 17 00:00:00 2001
From: Sichen <sl10445@nyu.edu>
Date: Wed, 30 Sep 2026 21:51:41 +0000
Subject: [PATCH] setpgid: accept a command and arguments that are not valid
 UTF-8

Read the command and its arguments as OsString so they reach execvp()
unchanged, as they do with util-linux setpgid.
---
 src/uu/setpgid/src/setpgid.rs | 15 +++++++++------
 tests/by-util/test_setpgid.rs | 29 +++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/src/uu/setpgid/src/setpgid.rs b/src/uu/setpgid/src/setpgid.rs
index 262e40a8..6abf8b09 100644
--- a/src/uu/setpgid/src/setpgid.rs
+++ b/src/uu/setpgid/src/setpgid.rs
@@ -3,6 +3,7 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
+use clap::builder::ValueParser;
 use clap::{crate_version, Arg, ArgAction, Command as ClapCommand};
 use uucore::{
     error::{UResult, USimpleError},
@@ -15,14 +16,15 @@ const USAGE: &str = help_usage!("setpgid.md");
 #[cfg(target_family = "unix")]
 #[uucore::main]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
-    use std::ffi::CString;
+    use std::ffi::{CString, OsString};
     use std::fs::File;
+    use std::os::unix::ffi::OsStrExt;
     use std::os::unix::io::AsRawFd;
 
     let matches = uu_app().try_get_matches_from(args)?;
 
-    let remaining_args: Vec<String> = matches
-        .get_many::<String>("args")
+    let remaining_args: Vec<OsString> = matches
+        .get_many::<OsString>("args")
         .unwrap()
         .cloned()
         .collect();
@@ -50,16 +52,16 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let program_args = &remaining_args[1..];
 
     // Command line arguments can't contain NUL bytes, so unwrap() is safe here.
-    let program_cstr = CString::new(program.as_str()).unwrap();
+    let program_cstr = CString::new(program.as_bytes()).unwrap();
     let mut argv = vec![program_cstr.clone()];
     for arg in program_args {
-        argv.push(CString::new(arg.as_str()).unwrap());
+        argv.push(CString::new(arg.as_bytes()).unwrap());
     }
 
     let Err(e) = nix::unistd::execvp(&program_cstr, &argv);
     Err(USimpleError::new(
         1,
-        format!("failed to execute '{}': {}", program, e),
+        format!("failed to execute '{}': {}", program.to_string_lossy(), e),
     ))
 }
 
@@ -94,6 +96,7 @@ pub fn uu_app() -> ClapCommand {
                 .required(true)
                 .action(ArgAction::Append)
                 .num_args(1..)
+                .value_parser(ValueParser::os_string())
                 .trailing_var_arg(true),
         )
 }
diff --git a/tests/by-util/test_setpgid.rs b/tests/by-util/test_setpgid.rs
index 88fc9a2d..8dc0b3ef 100644
--- a/tests/by-util/test_setpgid.rs
+++ b/tests/by-util/test_setpgid.rs
@@ -35,3 +35,32 @@ fn test_flag_after_command() {
         .succeeds()
         .stdout_is("-f\n");
 }
+
+#[test]
+#[cfg(target_family = "unix")]
+fn test_non_utf8_arguments() {
+    use std::ffi::OsStr;
+    use std::os::unix::ffi::OsStrExt;
+
+    new_ucmd!()
+        .arg("echo")
+        .arg(OsStr::from_bytes(b"\xff"))
+        .succeeds()
+        .stdout_is_bytes(b"\xff\n");
+}
+
+#[test]
+#[cfg(all(unix, not(target_os = "macos")))]
+fn test_non_utf8_program_name() {
+    use std::ffi::OsStr;
+    use std::os::unix::ffi::OsStrExt;
+    use uutests::at_and_ucmd;
+
+    let (at, mut ucmd) = at_and_ucmd!();
+    let program = at.plus(OsStr::from_bytes(b"sh_\xff"));
+    std::os::unix::fs::symlink("/bin/sh", &program).unwrap();
+    ucmd.arg(&program)
+        .args(&["-c", "echo ran"])
+        .succeeds()
+        .stdout_is("ran\n");
+}