ls: add selinux support

Author: sylvestre

src/uu/ls/src/ls.rs

@@ -2761,7 +2761,9 @@ fn display_item_long(
             } else {
                 ""
             },
-            if is_acl_set {
+            if is_acl_set && item.security_context.len() <= 1 {
+                // if selinux on the file, it is
+                // "."
                 // if acl has been set, we display a "+" at the end of the file permissions
                 "+"
             } else {

tests/by-util/test_ls.rs

@@ -4183,6 +4183,28 @@ fn test_ls_context2() {
     }
 }
 
+#[test]
+#[cfg(feature = "feat_selinux")]
+fn test_ls_context_long() {
+    use selinux::{self, KernelSupport};
+    if selinux::kernel_support() == KernelSupport::Unsupported {
+        println!("test skipped: Kernel has no support for SElinux context",);
+        return;
+    }
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    at.touch("foo");
+    for c_flag in ["-Zl", "-Zal"] {
+        let result = scene.ucmd().args(&[c_flag, "foo"]).succeeds();
+
+        let line: Vec<_> = result.stdout_str().split(" ").collect();
+        assert!(line[0].ends_with("."));
+        assert!(line[4].starts_with("unconfined_u"));
+        let s: Vec<_> = line[4].split(":").collect();
+        assert!(s.len() == 4);
+    }
+}
+
 #[test]
 #[cfg(feature = "feat_selinux")]
 fn test_ls_context_format() {