diff --git a/.gitignore b/.gitignore
index ea8c4bf..c44eaa5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 /target
+
+_test/
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ac09540
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# unzip-all
+
+unzip all compressed file using unar.
+
+first time write rust executable program~
diff --git a/src/main.rs b/src/main.rs
index 009c6e9..e705f9d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,17 +2,22 @@ use std::fs;
 use std::io;
 use std::path::{Path, PathBuf};
 use std::process::Command;
+use std::env;
 
 fn process_compressed_files(path: &Path) -> io::Result<()> {
     if path.is_dir() {
+        println!("Path: {}", path.display());
         for entry in fs::read_dir(path)? {
-            let entry_path = entry?.path();
+            let entry_path = fs::canonicalize(entry?.path())?;
             process_compressed_files(&entry_path)?;
         }
     } else {
-        if path.extension() == Some(std::ffi::OsStr::new("rar"))
-            || path.extension() == Some(std::ffi::OsStr::new("zip")) {
+        if path.extension().map_or(false, |ext|
+            ext == "rar" || ext == "zip",
+        ) {
+            println!("UNAR: {}", path.display());
             let output = Command::new("unar")
+                .current_dir(path)
                 .arg(path)
                 .output();
 
@@ -33,7 +38,14 @@ fn process_compressed_files(path: &Path) -> io::Result<()> {
 }
 
 fn main() -> io::Result<()> {
-    let start_path = PathBuf::from(".");
+    let args: Vec<String> = env::args().collect();
+
+    let start_path = if args.len() > 1 {
+        PathBuf::from(args[1].clone())
+    } else {
+        PathBuf::from(".")
+    };
     process_compressed_files(&start_path)?;
+
     Ok(())
 }