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stat: fix precision when rendering mtime (%Y)

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Support precision when rendering the time of last data modification
with `stat`. For example, after this commit

    $ stat --printf='%.1Y\n' f
    1668645806.7

Previously, the precision in the format specification was
ignored. This is implemented with a custom renderer because GNU `stat`
seems to truncate the number as opposed to rounding the number as
would happen when using `format!` with a specified number of digits of
precision.

Fixes #3233
This commit is contained in:
Jeffrey Finkelstein 2025-01-10 21:31:01 -05:00
parent cef9a2b960
commit 1d0dcb5962
2 changed files with 88 additions and 2 deletions
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11
tests/by-util/test_stat.rs
View file

@ -184,6 +184,17 @@ fn test_char() {
];
let ts = TestScenario::new(util_name!());
let expected_stdout = unwrap_or_return!(expected_result(&ts, &args)).stdout_move_str();
eprintln!("{expected_stdout}");
ts.ucmd().args(&args).succeeds().stdout_is(expected_stdout);
}
#[cfg(target_os = "linux")]
#[test]
fn test_printf_mtime_precision() {
let args = ["-c", "%.0Y %.1Y %.2Y %.3Y %.4Y", "/dev/pts/ptmx"];
let ts = TestScenario::new(util_name!());
let expected_stdout = unwrap_or_return!(expected_result(&ts, &args)).stdout_move_str();
eprintln!("{expected_stdout}");
ts.ucmd().args(&args).succeeds().stdout_is(expected_stdout);
}