console input and sbrk

1 files changed, 35 insertions, 0 deletions

diff --git a/console.c b/console.c
index 41f53e9..56817d8 100644
--- a/console.c
+++ b/console.c
@@ -208,6 +208,41 @@ consolewrite(struct inode *ip, char *buf, int n)
 }
 
 void
+consoleintr(int c)
+{
+  acquire(&cons.lock);
+
+  switch(c){
+  case C('U'):  // Kill line.
+    while(input.e != input.w &&
+          input.buf[(input.e-1) % INPUT_BUF] != '\n'){
+      input.e--;
+      consputc(BACKSPACE);
+    }
+    break;
+  case C('H'): case '\x7f':  // Backspace
+    if(input.e != input.w){
+      input.e--;
+      consputc(BACKSPACE);
+    }
+    break;
+  default:
+    if(c != 0 && input.e-input.r < INPUT_BUF){
+      c = (c == '\r') ? '\n' : c;
+      input.buf[input.e++ % INPUT_BUF] = c;
+      consputc(c);
+      if(c == '\n' || c == C('D') || input.e == input.r+INPUT_BUF){
+        input.w = input.e;
+        wakeup(&input.r);
+      }
+    }
+    break;
+  }
+  
+  release(&cons.lock);
+}
+
+void
 consoleinit(void)
 {
   initlock(&cons.lock, "console");