From 2ba356050d3bfd7da749678fe191353080bd478a Mon Sep 17 00:00:00 2001
From: Yu Chen <yuchen@mail.tsinghua.edu.cn>
Date: Sat, 7 May 2022 11:37:29 +0800
Subject: [PATCH] add ctrl-c response in fs/stdio.rs::read. But the default sig
 action for SIGINT is still wrong

---
 os/src/fs/stdio.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/os/src/fs/stdio.rs b/os/src/fs/stdio.rs
index 7c74d3e1..a45dff49 100644
--- a/os/src/fs/stdio.rs
+++ b/os/src/fs/stdio.rs
@@ -1,7 +1,7 @@
 use super::File;
 use crate::mm::UserBuffer;
 use crate::sbi::console_getchar;
-use crate::task::suspend_current_and_run_next;
+use crate::task::{suspend_current_and_run_next,current_task,SignalFlags,};
 
 pub struct Stdin;
 
@@ -23,6 +23,12 @@ impl File for Stdin {
             if c == 0 {
                 suspend_current_and_run_next();
                 continue;
+            } else if c == 3 {
+                // 3 is ctrl_c
+                let task = current_task().unwrap();
+                let mut inner = task.inner_exclusive_access();
+                inner.signals.insert(SignalFlags::SIGINT);
+                break;
             } else {
                 break;
             }