du: show error for nul names with --files0-from

src/uu/du/src/du.rs

@@ -26,11 +26,11 @@ use std::sync::mpsc;
 use std::thread;
 use std::time::{Duration, UNIX_EPOCH};
 use uucore::display::{print_verbatim, Quotable};
-use uucore::error::{FromIo, UError, UResult, USimpleError};
+use uucore::error::{set_exit_code, FromIo, UError, UResult, USimpleError};
 use uucore::line_ending::LineEnding;
 use uucore::parse_glob;
 use uucore::parse_size::{parse_size_u64, ParseSizeError};
-use uucore::{format_usage, help_about, help_section, help_usage, show, show_warning};
+use uucore::{format_usage, help_about, help_section, help_usage, show, show_error, show_warning};
 #[cfg(windows)]
 use windows_sys::Win32::Foundation::HANDLE;
 #[cfg(windows)]
@@ -621,9 +621,14 @@ fn read_files_from(file_name: &str) -> Result<Vec<PathBuf>, std::io::Error> {
 
  let mut paths = Vec::new();
 
- for line in reader.split(b'\0') {
+ for (i, line) in reader.split(b'\0').enumerate() {
  let path = line?;
- if !path.is_empty() {
+
+ if path.is_empty() {
+ let line_number = i + 1;
+ show_error!("{file_name}:{line_number}: invalid zero-length file name");
+ set_exit_code(1);
+ } else {
  paths.push(PathBuf::from(String::from_utf8_lossy(&path).to_string()));
  }
  }

tests/by-util/test_du.rs

@@ -1010,6 +1010,24 @@ fn test_du_files0_from() {
  .stdout_contains("testdir");
 }
 
+#[test]
+fn test_du_files0_from_with_invalid_zero_length_file_names() {
+ let ts = TestScenario::new(util_name!());
+ let at = &ts.fixtures;
+
+ at.touch("testfile");
+
+ at.write("filelist", "\0testfile\0\0");
+
+ ts.ucmd()
+ .arg("--files0-from=filelist")
+ .fails()
+ .code_is(1)
+ .stdout_contains("testfile")
+ .stderr_contains("filelist:1: invalid zero-length file name")
+ .stderr_contains("filelist:3: invalid zero-length file name");
+}
+
 #[test]
 fn test_du_files0_from_stdin() {
  let ts = TestScenario::new(util_name!());
@@ -1028,6 +1046,17 @@ fn test_du_files0_from_stdin() {
  .stdout_contains("testfile2");
 }
 
+#[test]
+fn test_du_files0_from_stdin_with_invalid_zero_length_file_names() {
+ new_ucmd!()
+ .arg("--files0-from=-")
+ .pipe_in("\0\0")
+ .fails()
+ .code_is(1)
+ .stderr_contains("-:1: invalid zero-length file name")
+ .stderr_contains("-:2: invalid zero-length file name");
+}
+
 #[test]
 fn test_du_files0_from_dir() {
  let ts = TestScenario::new(util_name!());