selinux: use the uucore function

Author: sylvestre

src/uu/id/src/id.rs

@@ -130,7 +130,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         selinux_supported: {
             #[cfg(feature = "selinux")]
             {
-                selinux::kernel_support() != selinux::KernelSupport::Unsupported
+                uucore::selinux::check_selinux_enabled().is_ok()
             }
             #[cfg(not(feature = "selinux"))]
             {

src/uu/ls/src/ls.rs

@@ -1112,7 +1112,7 @@ impl Config {
             selinux_supported: {
                 #[cfg(feature = "selinux")]
                 {
-                    selinux::kernel_support() != selinux::KernelSupport::Unsupported
+                    uucore::selinux::check_selinux_enabled().is_ok()
                 }
                 #[cfg(not(feature = "selinux"))]
                 {

src/uu/runcon/Cargo.toml

@@ -19,7 +19,7 @@ path = "src/runcon.rs"
 
 [dependencies]
 clap = { workspace = true }
-uucore = { workspace = true, features = ["entries", "fs", "perms"] }
+uucore = { workspace = true, features = ["entries", "fs", "perms", "selinux"] }
 selinux = { workspace = true }
 thiserror = { workspace = true }
 libc = { workspace = true }

src/uu/runcon/src/runcon.rs

@@ -271,7 +271,7 @@ fn set_next_exec_context(context: &OpaqueSecurityContext) -> Result<()> {
 }
 
 fn get_plain_context(context: &OsStr) -> Result<OpaqueSecurityContext> {
-    if selinux::kernel_support() == selinux::KernelSupport::Unsupported {
+    if !uucore::selinux::check_selinux_enabled().is_ok() {
         return Err(Error::SELinuxNotEnabled);
     }
 
@@ -342,7 +342,7 @@ fn get_custom_context(
     use OpaqueSecurityContext as OSC;
     type SetNewValueProc = fn(&OSC, &CStr) -> selinux::errors::Result<()>;
 
-    if selinux::kernel_support() == selinux::KernelSupport::Unsupported {
+    if !uucore::selinux::check_selinux_enabled().is_ok() {
         return Err(Error::SELinuxNotEnabled);
     }
 

tests/by-util/test_id.rs

@@ -381,8 +381,7 @@ fn test_id_zero() {
 #[test]
 #[cfg(feature = "feat_selinux")]
 fn test_id_context() {
-    use selinux::{self, KernelSupport};
-    if selinux::kernel_support() == KernelSupport::Unsupported {
+    if !uucore::selinux::check_selinux_enabled().is_ok() {
         println!("test skipped: Kernel has no support for SElinux context");
         return;
     }
@@ -456,8 +455,7 @@ fn test_id_no_specified_user_posixly() {
         feature = "feat_selinux"
     ))]
     {
-        use selinux::{self, KernelSupport};
-        if selinux::kernel_support() == KernelSupport::Unsupported {
+        if !uucore::selinux::check_selinux_enabled().is_ok() {
             println!("test skipped: Kernel has no support for SElinux context");
         } else {
             let result = ts.ucmd().succeeds();