Use tempfile (#1980)

userspace/ksud/src/boot_patch.rs

@@ -211,7 +211,10 @@ pub fn restore(
     magiskboot_path: Option<PathBuf>,
     flash: bool,
 ) -> Result<()> {
-    let tmpdir = tempdir::TempDir::new("KernelSU").context("create temp dir failed")?;
+    let tmpdir = tempfile::Builder::new()
+        .prefix("KernelSU")
+        .tempdir()
+        .context("create temp dir failed")?;
     let workdir = tmpdir.path();
     let magiskboot = find_magiskboot(magiskboot_path, workdir)?;
 
@@ -366,7 +369,10 @@ fn do_patch(
         );
     }
 
-    let tmpdir = tempdir::TempDir::new("KernelSU").context("create temp dir failed")?;
+    let tmpdir = tempfile::Builder::new()
+        .prefix("KernelSU")
+        .tempdir()
+        .context("create temp dir failed")?;
     let workdir = tmpdir.path();
 
     // extract magiskboot

userspace/ksud/src/utils.rs

@@ -206,7 +206,7 @@ fn find_temp_path() -> String {
     }
 
     // Try to create a random directory in /dev/
-    let r = tempdir::TempDir::new_in("/dev/", "");
+    let r = tempfile::tempdir_in("/dev/");
     match r {
         Ok(tmp_dir) => {
             if let Some(path) = tmp_dir.into_path().to_str() {