fix: disconnect VPN when sleep/shutdown

crates/gpapi/Cargo.toml

@@ -18,7 +18,7 @@ roxmltree.workspace = true
 serde.workspace = true
 specta = { workspace = true, features = ["derive"] }
 urlencoding.workspace = true
-tokio.workspace = true
+tokio = { workspace = true, features = ["process", "signal", "macros"] }
 serde_json.workspace = true
 whoami.workspace = true
 tempfile.workspace = true

crates/gpapi/src/utils/endpoint.rs

@@ -3,8 +3,13 @@ use tokio::fs;
 use crate::GP_SERVICE_LOCK_FILE;
 
 async fn read_port() -> anyhow::Result<String> {
-  let port = fs::read_to_string(GP_SERVICE_LOCK_FILE).await?;
-  Ok(port.trim().to_string())
+  // PID:PORT
+  let lock_content = fs::read_to_string(GP_SERVICE_LOCK_FILE).await?;
+  let port = lock_content
+    .split(':')
+    .last()
+    .ok_or_else(|| anyhow::anyhow!("Invalid lock file content"))?;
+  Ok(port.to_string())
 }
 
 pub async fn http_endpoint() -> anyhow::Result<String> {

crates/gpapi/src/utils/lock_file.rs

@@ -2,18 +2,20 @@ use std::path::PathBuf;
 
 pub struct LockFile {
   path: PathBuf,
+  pid: u32,
 }
 
 impl LockFile {
-  pub fn new<P: Into<PathBuf>>(path: P) -> Self {
-    Self { path: path.into() }
+  pub fn new<P: Into<PathBuf>>(path: P, pid: u32) -> Self {
+    Self { path: path.into(), pid }
   }
 
   pub fn exists(&self) -> bool {
     self.path.exists()
   }
 
-  pub fn lock(&self, content: impl AsRef<[u8]>) -> anyhow::Result<()> {
+  pub fn lock(&self, content: &str) -> anyhow::Result<()> {
+    let content = format!("{}:{}", self.pid, content);
     std::fs::write(&self.path, content)?;
     Ok(())
   }