refactor(linux): replace users crate with libc::geteuid for root detection

Closes #5333

src-tauri/Cargo.lock

@@ -1158,7 +1158,6 @@ dependencies = [
  "tauri-plugin-window-state",
  "tokio",
  "tokio-stream",
- "users",
  "warp",
  "winapi",
  "windows-sys 0.61.2",
@@ -8699,16 +8698,6 @@ dependencies = [
  "url",
 ]
 
-[[package]]
-name = "users"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "24cc0f6d6f267b73e5a2cadf007ba8f9bc39c6a6f9666f8cf25ea809a153b032"
-dependencies = [
- "libc",
- "log",
-]
-
 [[package]]
 name = "utf-8"
 version = "0.7.6"

src-tauri/Cargo.toml

@@ -112,9 +112,6 @@ windows-sys = { version = "0.61.2", features = [
   "Win32_UI_WindowsAndMessaging",
 ] }
 
-[target.'cfg(target_os = "linux")'.dependencies]
-users = "0.11.0"
-
 [target.'cfg(unix)'.dependencies]
 signal-hook = "0.3.18"
 

src-tauri/src/core/service.rs

@@ -122,7 +122,6 @@ async fn reinstall_service() -> Result<()> {
 #[cfg(target_os = "linux")]
 async fn uninstall_service() -> Result<()> {
     logging!(info, Type::Service, "uninstall service");
-    use users::get_effective_uid;
 
     let uninstall_path =
         tauri::utils::platform::current_exe()?.with_file_name("clash-verge-service-uninstall");
@@ -134,13 +133,14 @@ async fn uninstall_service() -> Result<()> {
     let uninstall_shell: String = uninstall_path.to_string_lossy().replace(" ", "\\ ");
 
     let elevator = crate::utils::help::linux_elevator();
-    let status = match get_effective_uid() {
-        0 => StdCommand::new(uninstall_shell).status()?,
-        _ => StdCommand::new(elevator)
+    let status = if linux_running_as_root() {
+        StdCommand::new(&uninstall_path).status()?
+    } else {
+        StdCommand::new(elevator)
             .arg("sh")
             .arg("-c")
             .arg(uninstall_shell)
-            .status()?,
+            .status()?
     };
     logging!(
         info,
@@ -163,7 +163,6 @@ async fn uninstall_service() -> Result<()> {
 #[allow(clippy::unused_async)]
 async fn install_service() -> Result<()> {
     logging!(info, Type::Service, "install service");
-    use users::get_effective_uid;
 
     let install_path =
         tauri::utils::platform::current_exe()?.with_file_name("clash-verge-service-install");
@@ -175,13 +174,14 @@ async fn install_service() -> Result<()> {
     let install_shell: String = install_path.to_string_lossy().replace(" ", "\\ ");
 
     let elevator = crate::utils::help::linux_elevator();
-    let status = match get_effective_uid() {
-        0 => StdCommand::new(install_shell).status()?,
-        _ => StdCommand::new(elevator)
+    let status = if linux_running_as_root() {
+        StdCommand::new(&install_path).status()?
+    } else {
+        StdCommand::new(elevator)
             .arg("sh")
             .arg("-c")
             .arg(install_shell)
-            .status()?,
+            .status()?
     };
     logging!(
         info,
@@ -218,6 +218,13 @@ async fn reinstall_service() -> Result<()> {
     }
 }
 
+#[cfg(target_os = "linux")]
+fn linux_running_as_root() -> bool {
+    const ROOT_UID: u32 = 0;
+
+    unsafe { libc::geteuid() == ROOT_UID }
+}
+
 #[cfg(target_os = "macos")]
 async fn uninstall_service() -> Result<()> {
     use crate::utils::i18n::t;