From fe184384161ae5dd32e973529187a486358882c8 Mon Sep 17 00:00:00 2001
From: Ryan Dahl <ry@tinyclouds.org>
Date: Fri, 30 Sep 2011 13:07:14 -0700
Subject: [PATCH] add uv_tty_reset_mode()

---
 include/uv.h   |  6 ++++++
 src/unix/tty.c | 17 +++++++++++++++++
 src/win/tty.c  |  6 ++++++
 3 files changed, 29 insertions(+)

diff --git a/include/uv.h b/include/uv.h
index b8bdc0930..348abe3f6 100644
--- a/include/uv.h
+++ b/include/uv.h
@@ -619,6 +619,12 @@ int uv_tty_init(uv_loop_t*, uv_tty_t*, uv_file fd);
  */
 int uv_tty_set_mode(uv_tty_t*, int mode);
 
+/*
+ * To be called when the program exits. Resets TTY settings to default
+ * values for the next process to take over.
+ */
+void uv_tty_reset_mode();
+
 /*
  * Gets the current Window size. On success zero is returned.
  */
diff --git a/src/unix/tty.c b/src/unix/tty.c
index 0bc492c14..3d074bf48 100644
--- a/src/unix/tty.c
+++ b/src/unix/tty.c
@@ -29,6 +29,10 @@
 #include <sys/ioctl.h>
 
 
+static int orig_termios_fd = -1;
+static struct termios orig_termios;
+
+
 int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd) {
   uv__nonblock(fd, 1);
   uv__stream_init(loop, (uv_stream_t*)tty, UV_TTY);
@@ -50,6 +54,12 @@ int uv_tty_set_mode(uv_tty_t* tty, int mode) {
       goto fatal;
     }
 
+    /* This is used for uv_tty_reset_mode() */
+    if (orig_termios_fd == -1) {
+      orig_termios = tty->orig_termios;
+      orig_termios_fd = fd;
+    }
+
     raw = tty->orig_termios;
     raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
     raw.c_oflag |= (ONLCR);
@@ -121,3 +131,10 @@ uv_handle_type uv_guess_handle(uv_file file) {
 
   return UV_NAMED_PIPE;
 }
+
+
+void uv_tty_reset_mode() {
+  if (orig_termios_fd >= 0) {
+    tcsetattr(orig_termios_fd, TCSANOW, &orig_termios);
+  }
+}
diff --git a/src/win/tty.c b/src/win/tty.c
index 1b7056144..b989bebe0 100644
--- a/src/win/tty.c
+++ b/src/win/tty.c
@@ -1589,3 +1589,9 @@ void uv_process_tty_connect_req(uv_loop_t* loop, uv_tty_t* handle,
     uv_connect_t* req) {
   abort();
 }
+
+
+void uv_tty_reset_mode() {
+  /* Not necessary to do anything. */
+  ;
+}