refactor

Cargo.lock

@@ -547,11 +547,11 @@ dependencies = [
 
 [[package]]
 name = "ctrlc"
-version = "3.1.9"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "232295399409a8b7ae41276757b5a1cc21032848d42bff2352261f958b3ca29a"
+checksum = "377c9b002a72a0b2c1a18c62e2f3864bdfea4a015e3683a96e24aa45dd6c02d1"
 dependencies = [
- "nix 0.20.0",
+ "nix 0.22.0",
  "winapi 0.3.9",
 ]
 
@@ -1727,6 +1727,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "memoffset"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59accc507f1338036a0477ef61afdae33cde60840f4dfe481319ce3ad116ddf9"
+dependencies = [
+ "autocfg 1.0.1",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.4.4"
@@ -1901,6 +1910,19 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "nix"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf1e25ee6b412c2a1e3fcb6a4499a5c1bfe7f43e014bdce9a6b6666e5aa2d187"
+dependencies = [
+ "bitflags",
+ "cc",
+ "cfg-if 1.0.0",
+ "libc",
+ "memoffset",
+]
+
 [[package]]
 name = "nom"
 version = "5.1.2"