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Merge pull request #3647 from philgebhardt/backup-protect-source

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cp: make `--b=simple` protective of source
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Sylvestre Ledru 2022-06-20 17:27:11 +02:00 • committed by GitHub
commit c277e933c9
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2 changed files with 28 additions and 1 deletions
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11
src/uu/cp/src/cp.rs
View file

@ -1256,7 +1256,16 @@ fn handle_existing_dest(source: &Path, dest: &Path, options: &Options) -> CopyRe
let backup_path = backup_control::get_backup_path(options.backup, dest, &options.backup_suffix);
if let Some(backup_path) = backup_path {
backup_dest(dest, &backup_path)?;
if paths_refer_to_same_file(source, &backup_path)? {
return Err(format!(
"backing up {} might destroy source; {} not copied",
dest.quote(),
source.quote()
)
.into());
} else {
backup_dest(dest, &backup_path)?;
}
}
match options.overwrite {

18
tests/by-util/test_cp.rs
View file

@ -558,6 +558,24 @@ fn test_cp_backup_simple() {
);
}
#[test]
fn test_cp_backup_simple_protect_source() {
let (at, mut ucmd) = at_and_ucmd!();
let source = format!("{}~", TEST_HELLO_WORLD_SOURCE);
at.touch(&source);
ucmd.arg("--backup=simple")
.arg(&source)
.arg(TEST_HELLO_WORLD_SOURCE)
.fails()
.stderr_only(format!(
"cp: backing up '{}' might destroy source; '{}' not copied",
TEST_HELLO_WORLD_SOURCE, source,
));
assert_eq!(at.read(TEST_HELLO_WORLD_SOURCE), "Hello, World!\n");
assert_eq!(at.read(&source), "");
}
#[test]
fn test_cp_backup_never() {
let (at, mut ucmd) = at_and_ucmd!();