uutils/coreutils
Auf GitHub ansehendate: strftime ignores flags and widths on %N (nanoseconds)
Open
#11.658 geöffnet am 5. Apr. 2026
U - datefuzzinggood first issue
Repository-Metriken
- Stars
- (23.246 Stars)
- PR-Merge-Metriken
- (Durchschn. Merge 9T 14h) (216 gemergte PRs in 30 T)
Beschreibung
Summary
GNU date honours strftime flags and widths on %N (nanoseconds). uutils ignores or mishandles them: %_3N should space-pad to width 3, and %-N should still emit the full 9-digit default, but uutils emits a single 0.
Found by a fuzz_date run.
Reproduction
$ LC_ALL=C TZ=UTC /usr/bin/date -d '@0' '+%_3N' | od -c | head -1
0000000 0 \n
$ LC_ALL=C TZ=UTC target/debug/coreutils date -d '@0' '+%_3N' | od -c | head -1
0000000 0 \n
$ LC_ALL=C TZ=UTC /usr/bin/date -d '@0' '+%-N'
000000000
$ LC_ALL=C TZ=UTC target/debug/coreutils date -d '@0' '+%-N'
0
Test
#[test]
fn test_date_strftime_n_width_and_flags() {
new_ucmd!()
.env("LC_ALL", "C")
.env("TZ", "UTC")
.arg("-d")
.arg("@0")
.arg("+%_3N")
.succeeds()
.stdout_is("0 \n");
new_ucmd!()
.env("LC_ALL", "C")
.env("TZ", "UTC")
.arg("-d")
.arg("@0")
.arg("+%-N")
.succeeds()
.stdout_is("000000000\n");
}