include io-blksize parameter

src/uu/split/src/split.rs

@@ -34,6 +34,9 @@ static OPT_NUMERIC_SUFFIXES: &str = "numeric-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 parameter is included to make GNU coreutils tests pass.
+static OPT_IO_BLKSIZE: &str = "-io-blksize";
 
 static ARG_INPUT: &str = "input";
 static ARG_PREFIX: &str = "prefix";
@@ -144,6 +147,13 @@ pub fn uu_app<'a>() -> App<'a> {
                 .long(OPT_VERBOSE)
                 .help("print a diagnostic just before each output file is opened"),
         )
+        .arg(
+            Arg::new(OPT_IO_BLKSIZE)
+                .long(OPT_IO_BLKSIZE)
+                .alias(OPT_IO_BLKSIZE)
+                .takes_value(true)
+                .hide(true),
+        )
         .arg(
             Arg::new(ARG_INPUT)
                 .takes_value(true)

tests/by-util/test_split.rs

@@ -441,6 +441,35 @@ fn test_number() {
     assert_eq!(file_read("xae"), "uvwxyz");
 }
 
+#[test]
+fn test_split_number_with_io_blksize() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let file_read = |f| {
+        let mut s = String::new();
+        at.open(f).read_to_string(&mut s).unwrap();
+        s
+    };
+    ucmd.args(&["-n", "5", "asciilowercase.txt", "---io-blksize", "1024"])
+        .succeeds();
+    assert_eq!(file_read("xaa"), "abcde");
+    assert_eq!(file_read("xab"), "fghij");
+    assert_eq!(file_read("xac"), "klmno");
+    assert_eq!(file_read("xad"), "pqrst");
+    assert_eq!(file_read("xae"), "uvwxyz");
+}
+
+#[test]
+fn test_split_default_with_io_blksize() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let name = "split_default_with_io_blksize";
+    RandomFile::new(&at, name).add_lines(2000);
+    ucmd.args(&[name, "---io-blksize", "2M"]).succeeds();
+
+    let glob = Glob::new(&at, ".", r"x[[:alpha:]][[:alpha:]]$");
+    assert_eq!(glob.count(), 2);
+    assert_eq!(glob.collate(), at.read_bytes(name));
+}
+
 #[test]
 fn test_invalid_suffix_length() {
     new_ucmd!()