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tail: use &mut File instead of mut file: &File

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This commit is contained in:
Jeffrey Finkelstein 2021-05-11 20:13:38 -04:00
parent 190a936a23
commit 3114fd77be
1 changed files with 4 additions and 4 deletions
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8
src/uu/tail/src/tail.rs
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@ -241,7 +241,7 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
}
let mut file = File::open(&path).unwrap();
if is_seekable(&mut file) {
bounded_tail(&file, &settings);
bounded_tail(&mut file, &settings);
if settings.follow {
let reader = BufReader::new(file);
readers.push(reader);
@ -400,7 +400,7 @@ fn follow<T: Read>(readers: &mut [BufReader<T>], filenames: &[String], settings:
/// true. The `file` is left seek'd to the position just after the byte that
/// `should_stop` returned true for.
fn backwards_thru_file<F>(
mut file: &File,
file: &mut File,
size: u64,
buf: &mut Vec<u8>,
delimiter: u8,
@ -448,14 +448,14 @@ fn backwards_thru_file<F>(
/// end of the file, and then read the file "backwards" in blocks of size
/// `BLOCK_SIZE` until we find the location of the first line/byte. This ends up
/// being a nice performance win for very large files.
fn bounded_tail(mut file: &File, settings: &Settings) {
fn bounded_tail(file: &mut File, settings: &Settings) {
let size = file.seek(SeekFrom::End(0)).unwrap();
let mut buf = vec![0; BLOCK_SIZE as usize];
// Find the position in the file to start printing from.
match settings.mode {
FilterMode::Lines(mut count, delimiter) => {
backwards_thru_file(&file, size, &mut buf, delimiter, &mut |byte| {
backwards_thru_file(file, size, &mut buf, delimiter, &mut |byte| {
if byte == delimiter {
count -= 1;
count == 0