ls: if acl are used, show the + in the perms (uutils#5816)

* ls: if acl are used, show the + in the perms

Tested by tests/mkdir/p-acl.sh

* CICD.yml: fix small formatting issue

---------

Co-authored-by: Daniel Hofstetter <daniel.hofstetter@42dh.com>

.github/workflows/CICD.yml

@@ -612,11 +612,23 @@ jobs:
       run: |
         ## Install/setup prerequisites
         case '${{ matrix.job.target }}' in
-          arm-unknown-linux-gnueabihf) sudo apt-get -y update ; sudo apt-get -y install gcc-arm-linux-gnueabihf ;;
-          aarch64-unknown-linux-*) sudo apt-get -y update ; sudo apt-get -y install gcc-aarch64-linux-gnu ;;
-          *-redox*) sudo apt-get -y update ; sudo apt-get -y install fuse3 libfuse-dev ;;
+          arm-unknown-linux-gnueabihf) 
+            sudo apt-get -y update
+            sudo apt-get -y install gcc-arm-linux-gnueabihf
+          ;;
+          aarch64-unknown-linux-*) 
+            sudo apt-get -y update
+            sudo apt-get -y install gcc-aarch64-linux-gnu
+          ;;
+          *-redox*) 
+            sudo apt-get -y update
+            sudo apt-get -y install fuse3 libfuse-dev
+          ;;
           # Update binutils if MinGW due to https://github.com/rust-lang/rust/issues/112368
-          x86_64-pc-windows-gnu) C:/msys64/usr/bin/pacman.exe -Syu --needed mingw-w64-x86_64-gcc --noconfirm ; echo "C:\msys64\mingw64\bin" >> $GITHUB_PATH ;;
+          x86_64-pc-windows-gnu)
+            C:/msys64/usr/bin/pacman.exe -Syu --needed mingw-w64-x86_64-gcc --noconfirm
+            echo "C:\msys64\mingw64\bin" >> $GITHUB_PATH
+          ;;
         esac
         case '${{ matrix.job.os }}' in
           macos-latest) brew install coreutils ;; # needed for testing

src/uu/ls/Cargo.toml

@@ -34,6 +34,9 @@ once_cell = { workspace = true }
 selinux = { workspace = true, optional = true }
 hostname = { workspace = true }
 
+[target.'cfg(unix)'.dependencies]
+xattr = { workspace = true }
+
 [[bin]]
 name = "ls"
 path = "src/main.rs"

src/uu/ls/src/ls.rs

@@ -3,7 +3,7 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-// spell-checker:ignore (ToDO) somegroup nlink tabsize dired subdired dtype colorterm
+// spell-checker:ignore (ToDO) somegroup nlink tabsize dired subdired dtype colorterm getxattr
 
 use clap::{
     builder::{NonEmptyStringValueParser, ValueParser},
@@ -36,6 +36,7 @@ use std::{
 };
 use term_grid::{Cell, Direction, Filling, Grid, GridOptions};
 use unicode_width::UnicodeWidthStr;
+
 #[cfg(any(
     target_os = "linux",
     target_os = "macos",
@@ -2620,6 +2621,18 @@ fn display_grid(
     Ok(())
 }
 
+#[cfg(all(unix, not(any(target_os = "android", target_os = "macos"))))]
+fn file_has_acl<P: AsRef<Path>>(file: P) -> bool {
+    // don't use exacl here, it is doing more getxattr call then needed
+    match xattr::list(file) {
+        Ok(acl) => {
+            // if we have extra attributes, we have an acl
+            acl.count() > 0
+        }
+        Err(_) => false,
+    }
+}
+
 /// This writes to the BufWriter out a single string of the output of `ls -l`.
 ///
 /// It writes the following keys, in order:
@@ -2663,9 +2676,14 @@ fn display_item_long(
         output_display += "  ";
     }
     if let Some(md) = item.get_metadata(out) {
+        #[cfg(any(not(unix), target_os = "android", target_os = "macos"))]
+        // TODO: See how Mac should work here
+        let is_acl_set = false;
+        #[cfg(all(unix, not(any(target_os = "android", target_os = "macos"))))]
+        let is_acl_set = file_has_acl(item.display_name.as_os_str());
         write!(
             output_display,
-            "{}{} {}",
+            "{}{}{} {}",
             display_permissions(md, true),
             if item.security_context.len() > 1 {
                 // GNU `ls` uses a "." character to indicate a file with a security context,
@@ -2674,6 +2692,12 @@ fn display_item_long(
             } else {
                 ""
             },
+            if is_acl_set {
+                // if acl has been set, we display a "+" at the end of the file permissions
+                "+"
+            } else {
+                ""
+            },
             pad_left(&display_symlink_count(md), padding.link_count)
         )
         .unwrap();

tests/by-util/test_ls.rs

@@ -4293,3 +4293,39 @@ fn test_term_colorterm() {
         "exe"
     );
 }
+
+#[cfg(all(unix, not(target_os = "macos")))]
+#[test]
+fn test_acl_display() {
+    use std::process::Command;
+
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    let path = "a42";
+    at.mkdir(path);
+
+    let path = at.plus_as_string(path);
+    // 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", "group::rwx", &path])
+        .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;
+        }
+    }
+
+    scene
+        .ucmd()
+        .args(&["-lda", &path])
+        .succeeds()
+        .stdout_contains("+");
+}