From: Takashi Yano <takashi.yano@nifty.ne.jp>
Date: Sun, 12 Dec 2021 12:20:47 +0000 (+0900)
Subject: Cygwin: pty: Fix Ctrl-C handling for non-cygwin apps in background.
X-Git-Tag: newlib-snapshot-20211231~23
X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=e91ea41ef1be3d3e52c451c7bd691e0c2b7de910;p=newlib-cygwin.git

Cygwin: pty: Fix Ctrl-C handling for non-cygwin apps in background.

- With pseudo console enabled, if the non-cygwin app is started in
  the background and put it into the foreground, the process cannot
  be stopped by Ctrl-C. This patch fixes the issue.
---

diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc
index 4f135839d..37e27f34a 100644
--- a/winsup/cygwin/fhandler_tty.cc
+++ b/winsup/cygwin/fhandler_tty.cc
@@ -2249,9 +2249,12 @@ fhandler_pty_master::write (const void *ptr, size_t len)
 			  &mbp);
 	}
 
-      if ((ti.c_lflag & ISIG) && !(ti.c_lflag & NOFLSH)
-	  && memchr (buf, '\003', nlen))
-	get_ttyp ()->discard_input = true;
+      if ((ti.c_lflag & ISIG) && memchr (buf, '\003', nlen))
+	{
+	  get_ttyp ()->kill_pgrp (SIGINT);
+	  if (!(ti.c_lflag & NOFLSH))
+	    get_ttyp ()->discard_input = true;
+	}
       DWORD n;
       WriteFile (to_slave_nat, buf, nlen, &n, NULL);
       ReleaseMutex (input_mutex);