完成与Linux兼容的Ntty (#517)

* 已经完成的功能：
- 写：printf能够正常在tty输出
- 读：与键盘驱动接上
- 信号： 能够正常通过ctrl向前台进程发送信号

* 支持目前的shell，改动printk使其与新版tty兼容。

* 删除原有tty文件夹，并更改新tty文件名

* 添加clear清屏程序

* 实现tty部分ioctl，更改部分问题

user/apps/clear/.gitignore

@@ -0,0 +1,3 @@
+/target
+Cargo.lock
+/install/

user/apps/clear/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "clear"
+version = "0.1.0"
+edition = "2021"
+description = "clear screen"
+authors = [ "GnoCiYeH <heyicong@dragonos.org>" ]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

user/apps/clear/Makefile

@@ -0,0 +1,56 @@
+TOOLCHAIN="+nightly-2023-08-15-x86_64-unknown-linux-gnu"
+# RUSTFLAGS+="-C target-feature=+crt-static -C link-arg=-no-pie"
+
+ifdef DADK_CURRENT_BUILD_DIR
+# 如果是在dadk中编译，那么安装到dadk的安装目录中
+	INSTALL_DIR = $(DADK_CURRENT_BUILD_DIR)
+else
+# 如果是在本地编译，那么安装到当前目录下的install目录中
+	INSTALL_DIR = ./install
+endif
+
+ifeq ($(ARCH), x86_64)
+	export RUST_TARGET=x86_64-unknown-linux-musl
+else ifeq ($(ARCH), riscv64)
+	export RUST_TARGET=riscv64gc-unknown-linux-gnu
+else 
+# 默认为x86_86，用于本地编译
+	export RUST_TARGET=x86_64-unknown-linux-musl
+endif
+
+run:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) run --target $(RUST_TARGET)
+
+build:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) build --target $(RUST_TARGET)
+
+clean:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) clean --target $(RUST_TARGET)
+
+test:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) test --target $(RUST_TARGET)
+
+doc:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) doc --target $(RUST_TARGET)
+
+fmt:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) fmt
+
+fmt-check:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) fmt --check
+
+run-release:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) run --target $(RUST_TARGET) --release
+
+build-release:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) build --target $(RUST_TARGET) --release
+
+clean-release:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) clean --target $(RUST_TARGET) --release
+
+test-release:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) test --target $(RUST_TARGET) --release
+
+.PHONY: install
+install:
+	RUSTFLAGS=$(RUSTFLAGS) cargo $(TOOLCHAIN) install --target $(RUST_TARGET) --path . --no-track --root $(INSTALL_DIR) --force

user/apps/clear/README.md

@@ -0,0 +1,7 @@
+# DragonOS Tty Clear
+
+清屏程序：clear指令
+
+## 使用方法
+
+1. 直接运行`clear`即可

user/apps/clear/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("\x1Bc");
+}