date: allow non-utf8 path for --file

Author: cakebaker

src/uu/date/src/date.rs

@@ -350,9 +350,9 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
             USimpleError::new(1, format!("invalid date '{escaped_str}'"))
         })?;
         DateSource::Human(date.into())
-    } else if let Some(file) = matches.get_one::<String>(OPT_FILE) {
-        match file.as_ref() {
-            "-" => DateSource::Stdin,
+    } else if let Some(file) = matches.get_one::<OsString>(OPT_FILE) {
+        match file.as_encoded_bytes() {
+            b"-" => DateSource::Stdin,
             _ => DateSource::File(file.into()),
         }
     } else if let Some(file) = matches.get_one::<OsString>(OPT_REFERENCE) {
@@ -695,6 +695,7 @@ pub fn uu_app() -> Command {
                 .long(OPT_FILE)
                 .value_name("DATEFILE")
                 .value_hint(clap::ValueHint::FilePath)
+                .value_parser(clap::value_parser!(OsString))
                 .conflicts_with(OPT_DATE)
                 .help(translate!("date-help-file")),
         )

tests/by-util/test_date.rs

@@ -642,6 +642,20 @@ fn test_date_for_empty_file() {
     ucmd.arg("--file").arg(file).succeeds().no_output();
 }
 
+#[test]
+#[cfg(target_os = "linux")]
+#[cfg_attr(wasi_runner, ignore = "WASI: argv/filenames must be valid UTF-8")]
+fn test_date_for_file_with_non_utf8_path() {
+    use std::os::unix::ffi::OsStrExt;
+
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    let file = std::ffi::OsStr::from_bytes(b"file_\xFF\xFE.txt");
+    std::fs::File::create(at.plus(file)).unwrap();
+
+    ucmd.arg("--file").arg(file).succeeds().no_output();
+}
+
 #[test]
 fn test_date_file_invalid_utf8_line() {
     let (at, mut ucmd) = at_and_ucmd!();