Match GNU semantics for missing EOF

src/uu/split/src/split.rs

@@ -37,8 +37,9 @@ static OPT_HEX_SUFFIXES: &str = "hex-suffixes";
 static OPT_SUFFIX_LENGTH: &str = "suffix-length";
 static OPT_DEFAULT_SUFFIX_LENGTH: &str = "0";
 static OPT_VERBOSE: &str = "verbose";
-//The ---io-blksize parameter is consumed and ignored.
+//The ---io and ---io-blksize parameters are consumed and ignored.
 //The parameter is included to make GNU coreutils tests pass.
+static OPT_IO: &str = "-io";
 static OPT_IO_BLKSIZE: &str = "-io-blksize";
 static OPT_ELIDE_EMPTY_FILES: &str = "elide-empty-files";
 
@@ -159,6 +160,13 @@ pub fn uu_app<'a>() -> Command<'a> {
  .long(OPT_VERBOSE)
  .help("print a diagnostic just before each output file is opened"),
  )
+ .arg(
+ Arg::new(OPT_IO)
+ .long(OPT_IO)
+ .alias(OPT_IO)
+ .takes_value(true)
+ .hide(true),
+ )
  .arg(
  Arg::new(OPT_IO_BLKSIZE)
  .long(OPT_IO_BLKSIZE)
@@ -922,10 +930,22 @@ impl<'a> Write for LineBytesChunkWriter<'a> {
  // then move on to the next chunk if necessary.
  None => {
  let end = self.num_bytes_remaining_in_current_chunk;
- let num_bytes_written = self.inner.write(&buf[..end.min(buf.len())])?;
- self.num_bytes_remaining_in_current_chunk -= num_bytes_written;
- total_bytes_written += num_bytes_written;
- buf = &buf[num_bytes_written..];
+
+ // This is ugly but here to match GNU behavior. If the input
+ // doesn't end with a \n, pretend that it does for handling
+ // the second to last segment chunk. See `line-bytes.sh`.
+ if end == buf.len()
+ && self.num_bytes_remaining_in_current_chunk
+ < self.chunk_size.try_into().unwrap()
+ && buf[buf.len() - 1] != b'\n'
+ {
+ self.num_bytes_remaining_in_current_chunk = 0;
+ } else {
+ let num_bytes_written = self.inner.write(&buf[..end.min(buf.len())])?;
+ self.num_bytes_remaining_in_current_chunk -= num_bytes_written;
+ total_bytes_written += num_bytes_written;
+ buf = &buf[num_bytes_written..];
+ }
  }
 
  // If there is a newline character and the line

tests/by-util/test_split.rs

@@ -659,6 +659,22 @@ fn test_line_bytes_no_empty_file() {
  assert!(!at.plus("xak").exists());
 }
 
+#[test]
+fn test_line_bytes_no_eof() {
+ let (at, mut ucmd) = at_and_ucmd!();
+ ucmd.args(&["-C", "3"])
+ .pipe_in("1\n2222\n3\n4")
+ .succeeds()
+ .no_stdout()
+ .no_stderr();
+ assert_eq!(at.read("xaa"), "1\n");
+ assert_eq!(at.read("xab"), "222");
+ assert_eq!(at.read("xac"), "2\n");
+ assert_eq!(at.read("xad"), "3\n");
+ assert_eq!(at.read("xae"), "4");
+ assert!(!at.plus("xaf").exists());
+}
+
 #[test]
 fn test_guard_input() {
  let ts = TestScenario::new(util_name!());

tests/fixtures/split/noeof.txt

@@ -0,0 +1,4 @@
+1
+2222
+3
+4