Merge pull request #6032 from RenjiSann/feature/printf-0c-error

printf: '%0c' and '%0s' should fail

src/uucore/src/lib/features/format/spec.rs

@@ -171,7 +171,7 @@ impl Spec {
  Ok(match type_spec {
  // GNU accepts minus, plus and space even though they are not used
  b'c' => {
- if flags.hash || precision.is_some() {
+ if flags.zero || flags.hash || precision.is_some() {
  return Err(&start[..index]);
  }
  Self::Char {
@@ -180,7 +180,7 @@ impl Spec {
  }
  }
  b's' => {
- if flags.hash {
+ if flags.zero || flags.hash {
  return Err(&start[..index]);
  }
  Self::String {

tests/by-util/test_printf.rs

@@ -765,3 +765,15 @@ fn pad_string() {
  .stdout_only(expected);
  }
 }
+
+#[test]
+fn format_spec_zero_char_fails() {
+ // It is invalid to have the format spec '%0c'
+ new_ucmd!().args(&["%0c", "3"]).fails().code_is(1);
+}
+
+#[test]
+fn format_spec_zero_string_fails() {
+ // It is invalid to have the format spec '%0s'
+ new_ucmd!().args(&["%0s", "3"]).fails().code_is(1);
+}