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Merge pull request #2518 from jfinkels/tac-no-line-separators-in-file

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tac: handle no line separators in file
This commit is contained in:
Sylvestre Ledru 2021-07-31 09:44:29 +02:00 committed by GitHub
commit 00f6fce89d
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 13 additions and 1 deletions
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9
src/uu/tac/src/tac.rs
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@ -139,9 +139,16 @@ fn tac(filenames: Vec<String>, before: bool, _: bool, separator: &str) -> i32 {
i += 1;
}
}
// If the file contains no line separators, then simply write
// the contents of the file directly to stdout.
if offsets.is_empty() {
out.write_all(&data)
.unwrap_or_else(|e| crash!(1, "failed to write to stdout: {}", e));
return exit_code;
}
// if there isn't a separator at the end of the file, fake it
if offsets.is_empty() || *offsets.last().unwrap() < data.len() - slen {
if *offsets.last().unwrap() < data.len() - slen {
offsets.push(data.len());
}

5
tests/by-util/test_tac.rs
View file

@ -68,3 +68,8 @@ fn test_invalid_input() {
.fails()
.stderr_contains("dir: read error: Invalid argument");
}
#[test]
fn test_no_line_separators() {
new_ucmd!().pipe_in("a").succeeds().stdout_is("a");
}