shim: expose checkPid in constructor

This will be supported soon when launching via fsu.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

cmd/fsu/main.go

@@ -91,7 +91,7 @@ func parseConfig(p string, puid int) (fid int, ok bool) {
 	} else if s.Mode().Perm() != 0400 {
 		log.Fatal("bad fsurc perm")
 	} else if st := s.Sys().(*syscall.Stat_t); st.Uid != 0 || st.Gid != 0 {
-		log.Fatal("fsurc must be owner by uid 0")
+		log.Fatal("fsurc must be owned by uid 0")
 	}
 
 	if r, err := os.Open(p); err != nil {