ls: follow symlinks for xattrs, fix #8216

.vscode/cspell.dictionaries/jargon.wordlist.txt

@@ -68,6 +68,7 @@ kibi
 kibibytes
 libacl
 lcase
+listxattr
 llistxattr
 lossily
 lstat

src/uucore/src/lib/features/fsxattr.rs

@@ -79,7 +79,7 @@ pub fn apply_xattrs<P: AsRef<Path>>(
 /// `true` if the file has extended attributes (indicating an ACL), `false` otherwise.
 pub fn has_acl<P: AsRef<Path>>(file: P) -> bool {
     // don't use exacl here, it is doing more getxattr call then needed
-    xattr::list(file).is_ok_and(|acl| {
+    xattr::list_deref(file).is_ok_and(|acl| {
         // if we have extra attributes, we have an acl
         acl.count() > 0
     })

tests/by-util/test_ls.rs

@@ -5716,3 +5716,40 @@ fn test_unknown_format_specifier() {
         .succeeds()
         .stdout_matches(&re_custom_format);
 }
+
+#[cfg(all(unix, not(target_os = "macos")))]
+#[test]
+fn test_acl_display_symlink() {
+    use std::process::Command;
+
+    let (at, mut ucmd) = at_and_ucmd!();
+    let dir_name = "dir";
+    let link_name = "link";
+    at.mkdir(dir_name);
+
+    // calling the command directly. xattr requires some dev packages to be installed
+    // and it adds a complex dependency just for a test
+    match Command::new("setfacl")
+        .args(["-d", "-m", "u:bin:rwx", &at.plus_as_string(dir_name)])
+        .status()
+        .map(|status| status.code())
+    {
+        Ok(Some(0)) => {}
+        Ok(_) => {
+            println!("test skipped: setfacl failed");
+            return;
+        }
+        Err(e) => {
+            println!("test skipped: setfacl failed with {e}");
+            return;
+        }
+    }
+
+    at.symlink_dir(dir_name, link_name);
+
+    let re_with_acl = Regex::new(r"[a-z-]*\+ .*link").unwrap();
+    ucmd.arg("-lLd")
+        .arg(link_name)
+        .succeeds()
+        .stdout_matches(&re_with_acl);
+}

util/gnu-patches/tests_ls_no_cap.patch

@@ -8,13 +8,13 @@ index 99f0563bc..f7b9e7885 100755
  LS_COLORS=ca=1; export LS_COLORS
 -strace -e capget ls --color=always > /dev/null 2> out || fail=1
 -$EGREP 'capget\(' out || skip_ "your ls doesn't call capget"
-+strace -e llistxattr ls --color=always > /dev/null 2> out || fail=1
-+$EGREP 'llistxattr\(' out || skip_ "your ls doesn't call llistxattr"
++strace -e listxattr ls --color=always > /dev/null 2> out || fail=1
++$EGREP 'listxattr\(' out || skip_ "your ls doesn't call listxattr"
 
  LS_COLORS=ca=:; export LS_COLORS
 -strace -e capget ls --color=always > /dev/null 2> out || fail=1
 -$EGREP 'capget\(' out && fail=1
-+strace -e llistxattr ls --color=always > /dev/null 2> out || fail=1
-+$EGREP 'llistxattr\(' out && fail=1
++strace -e listxattr ls --color=always > /dev/null 2> out || fail=1
++$EGREP 'listxattr\(' out && fail=1
 
  Exit $fail