diff --git a/btest.sh b/btest.sh
new file mode 100755
index 0000000..42a009f
--- /dev/null
+++ b/btest.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+go build -o ./exe/ ./cmd/*
+
diff --git a/cmd/termsize/main.go b/cmd/termsize/main.go
new file mode 100644
index 0000000..fac7dad
--- /dev/null
+++ b/cmd/termsize/main.go
@@ -0,0 +1,34 @@
+package main
+
+import "surdeus.su/core/cli/tx"
+import "fmt"
+import "log"
+import "os"
+
+func main() {
+	term, ok := tx.NewTerminal(os.Stdin)
+	if !ok {
+		// Some not terminal handling.
+		log.Fatal("not terminal")
+	}
+	term.MakeRaw()
+	defer term.Restore()
+
+	w, h, err := term.GetSize()
+	if err != nil {
+		log.Fatalf("term.GetSize(...): %s\n", err)
+	}
+	fmt.Printf("%d\n%d\n", w, h)
+
+	for {
+		key, _, err := term.ReadKey()
+		if err != nil {
+			log.Fatalf("term.ReadLine(...): %s\n", err)
+		}
+		if key == tx.KeyControlC {
+			break
+		}
+		term.Printf("shit: %q\r\n", key)
+	}
+}
+
diff --git a/go.mod b/go.mod
index c500fec..db0c779 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,8 @@
 module surdeus.su/core/cli
 
 go 1.18
+
+require (
+	golang.org/x/sys v0.21.0 // indirect
+	golang.org/x/term v0.21.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..6208220
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,4 @@
+golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.21.0 h1:WVXCp+/EBEHOj53Rvu+7KiT/iElMrO8ACK16SMZ3jaA=
+golang.org/x/term v0.21.0/go.mod h1:ooXLefLobQVslOqselCNF4SxFAaoS6KujMbsGzSDmX0=
diff --git a/taskfile.yml b/taskfile.yml
deleted file mode 100644
index 13095cb..0000000
--- a/taskfile.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-version: '3'
-
-tasks:
-  btest:
-    cmds:
-      - go build ./cmd/test
-
diff --git a/tx/aes.go b/tx/aes.go
new file mode 100644
index 0000000..aa7a446
--- /dev/null
+++ b/tx/aes.go
@@ -0,0 +1,8 @@
+package tx
+
+type Key rune
+
+const (
+	KeyControlC Key = '\x03'
+)
+
diff --git a/tx/term.go b/tx/term.go
new file mode 100644
index 0000000..5942d99
--- /dev/null
+++ b/tx/term.go
@@ -0,0 +1,86 @@
+package tx
+
+import "golang.org/x/term"
+import "bufio"
+import "fmt"
+import "os"
+
+type Terminal struct {
+	x *term.Terminal
+	file *os.File
+	input *bufio.Reader
+	fd int
+	prevState *term.State
+}
+
+func NewTerminal(input *os.File) (*Terminal, bool) {
+	if input == nil {
+		return nil, false
+	}
+
+	fd := int(input.Fd())
+	if !term.IsTerminal(fd) {
+		return nil, false
+	}
+
+
+	ret := Terminal{}
+	ret.file = input
+	ret.input = bufio.NewReader(input)
+	ret.fd = fd
+	ret.x = term.NewTerminal(input, "")
+
+	return &ret, true
+}
+
+func (t *Terminal) MakeRaw() error {
+	state, err := term.MakeRaw(t.fd)
+	if err != nil {
+		return err
+	}
+
+	t.prevState = state
+	return nil
+}
+
+func (t *Terminal) Restore() error {
+	if t.prevState == nil {
+		return nil
+	}
+
+	err := term.Restore(t.fd, t.prevState)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (t *Terminal) GetSize() (int, int, error) {
+	return term.GetSize(t.fd)
+}
+
+func (t *Terminal) ReadLine() (string, error) {
+	return t.x.ReadLine()
+}
+
+func (t *Terminal) ReadKey() (Key, int, error) {
+	r, size, err := t.input.ReadRune()
+	return Key(r), size, err
+}
+
+func (t *Terminal) Write(bts []byte) (int, error) {
+	return t.x.Write(bts)
+}
+
+func (t *Terminal) Printf(
+	format string, v ...any,
+) (int, error) {
+	str := fmt.Sprintf(format, v...)
+	return t.Write([]byte(str))
+}
+
+func (t *Terminal) Print(v ...any) (int, error) {
+	str := fmt.Sprint(v...)
+	return t.Write([]byte(str))
+}