ksud: refine mount

- `magic_mount` now takes the tmp_path from its argument
- `.notmpfs` and `.nomount` now behave the same

skip:
ksud: cache tmp path (74ce44de21963fddc83897846eed28eca89d78aa)

Co-authored-by: shatyuka <shatyuka@qq.com>
Signed-off-by: Faris <rsuntk@yukiprjkt.my.id>

userspace/ksud/src/utils.rs

@@ -183,7 +183,7 @@ fn is_ok_empty(dir: &str) -> bool {
     }
 }
 
-pub fn get_tmp_path() -> String {
+pub fn find_tmp_path() -> String {
     let dirs = ["/debug_ramdisk", "/patch_hw", "/oem", "/root", "/sbin"];
 
     // find empty directory
@@ -195,11 +195,6 @@ pub fn get_tmp_path() -> String {
     "".to_string()
 }
 
-pub fn get_work_dir() -> String {
-    let tmp_path = get_tmp_path();
-    format!("{}/workdir/", tmp_path)
-}
-
 #[cfg(target_os = "android")]
 fn link_ksud_to_bin() -> Result<()> {
     let ksu_bin = PathBuf::from(defs::DAEMON_PATH);