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tail: fix handling of PermissionDenied Error

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* add tests for opening unreadable files
This commit is contained in:
Jan Scheer 2022-05-26 12:53:50 +02:00
parent 6bd9a1d537
commit 4bbf708c81
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GPG key ID: C62AD4C29E2B9828
2 changed files with 86 additions and 32 deletions
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22
src/uu/tail/src/tail.rs
View file

@ -383,11 +383,12 @@ fn uu_tail(mut settings: Settings) -> UResult<()> {
}
}
} else if path.is_tailable() {
match File::open(&path) {
Ok(mut file) => {
if settings.verbose {
files.print_header(&path, !first_header);
first_header = false;
}
let mut file = File::open(&path).unwrap();
let mut reader;
if is_seekable(&mut file) && get_block_size(md.as_ref().unwrap()) > 0 {
@ -408,6 +409,21 @@ fn uu_tail(mut settings: Settings) -> UResult<()> {
},
);
}
}
Err(e) if e.kind() == std::io::ErrorKind::PermissionDenied => {
settings.return_code = 1;
show_error!(
"cannot open {} for reading: Permission denied",
display_name.quote()
);
}
Err(e) => {
return Err(USimpleError::new(
1,
format!("{}: {}", display_name.quote(), e),
));
}
}
} else if settings.retry && settings.follow.is_some() {
if path.is_relative() {
path = std::env::current_dir().unwrap().join(&path);
@ -931,8 +947,7 @@ fn handle_event(
);
}
}
if event_path.is_orphan() {
if !orphans.contains(event_path) {
if event_path.is_orphan() && !orphans.contains(event_path) {
show_error!("directory containing watched file was removed");
show_error!(
"{} cannot be used, reverting to polling",
@ -940,7 +955,6 @@ fn handle_event(
);
orphans.push(event_path.to_path_buf());
}
}
let _ = watcher.unwatch(event_path);
} else {
show_error!("{}: {}", display_name.display(), text::NO_SUCH_FILE);

40
tests/by-util/test_tail.rs
View file

@ -97,6 +97,46 @@ fn test_stdin_redirect_file() {
assert!(buf_stderr.is_empty());
}
#[test]
#[cfg(not(target_os = "windows"))]
#[cfg(feature = "chmod")]
fn test_permission_denied() {
let ts = TestScenario::new(util_name!());
let at = &ts.fixtures;
at.touch("unreadable");
ts.ccmd("chmod").arg("0").arg("unreadable").succeeds();
ts.ucmd()
.set_stdin(Stdio::null())
.arg("unreadable")
.fails()
.stderr_is("tail: cannot open 'unreadable' for reading: Permission denied\n")
.no_stdout()
.code_is(1);
}
#[test]
#[cfg(not(target_os = "windows"))]
#[cfg(feature = "chmod")]
fn test_permission_denied_multiple() {
let ts = TestScenario::new(util_name!());
let at = &ts.fixtures;
at.touch("file1");
at.touch("file2");
at.touch("unreadable");
ts.ccmd("chmod").arg("0").arg("unreadable").succeeds();
ts.ucmd()
.set_stdin(Stdio::null())
.args(&["file1", "unreadable", "file2"])
.fails()
.stderr_is("tail: cannot open 'unreadable' for reading: Permission denied\n")
.stdout_is("==> file1 <==\n\n==> file2 <==\n")
.code_is(1);
}
#[test]
#[cfg(target_os = "linux")]
fn test_follow_redirect_stdin_name_retry() {