Refactor project structure

kernel/aster-nix/src/syscall/shutdown.rs

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use super::{SyscallReturn, SYS_SHUTDOWN};
+use crate::{
+    fs::file_table::FileDescripter, log_syscall_entry, net::socket::SockShutdownCmd, prelude::*,
+    util::net::get_socket_from_fd,
+};
+
+pub fn sys_shutdown(sockfd: FileDescripter, how: i32) -> Result<SyscallReturn> {
+    log_syscall_entry!(SYS_SHUTDOWN);
+    let shutdown_cmd = SockShutdownCmd::try_from(how)?;
+    debug!("sockfd = {sockfd}, cmd = {shutdown_cmd:?}");
+
+    let socket = get_socket_from_fd(sockfd)?;
+    socket.shutdown(shutdown_cmd)?;
+    Ok(SyscallReturn::Return(0))
+}