From bf75f1b147b8cc4c5506df7c4bb30b9950ceda1a Mon Sep 17 00:00:00 2001
From: Soumendra Ganguly <67527439+8vasu@users.noreply.github.com>
Date: Sun, 11 Feb 2024 11:29:44 +0100
Subject: [PATCH] gh-85984: Add _POSIX_VDISABLE from unistd.h to termios
 module. (#114985)

Signed-off-by: Soumendra Ganguly <soumendraganguly@gmail.com>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
---
 .../Library/2024-02-04-02-28-37.gh-issue-85984.NHZVTQ.rst  | 1 +
 Modules/termios.c                                          | 7 ++++---
 2 files changed, 5 insertions(+), 3 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Library/2024-02-04-02-28-37.gh-issue-85984.NHZVTQ.rst

diff --git a/Misc/NEWS.d/next/Library/2024-02-04-02-28-37.gh-issue-85984.NHZVTQ.rst b/Misc/NEWS.d/next/Library/2024-02-04-02-28-37.gh-issue-85984.NHZVTQ.rst
new file mode 100644
index 00000000000..bfa7e676f92
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-02-04-02-28-37.gh-issue-85984.NHZVTQ.rst
@@ -0,0 +1 @@
+Added ``_POSIX_VDISABLE`` from C's ``<unistd.h>`` to :mod:`termios`.
diff --git a/Modules/termios.c b/Modules/termios.c
index 69dbd88be5f..4635fefb8f3 100644
--- a/Modules/termios.c
+++ b/Modules/termios.c
@@ -27,9 +27,7 @@
 
 #include <termios.h>
 #include <sys/ioctl.h>
-#if defined(__sun) && defined(__SVR4)
-#  include <unistd.h>             // ioctl()
-#endif
+#include <unistd.h> // _POSIX_VDISABLE
 
 /* HP-UX requires that this be included to pick up MDCD, MCTS, MDSR,
  * MDTR, MRI, and MRTS (apparently used internally by some things
@@ -1315,6 +1313,9 @@ static struct constant {
 #ifdef TIOCTTYGSTRUCT
     {"TIOCTTYGSTRUCT", TIOCTTYGSTRUCT},
 #endif
+#ifdef _POSIX_VDISABLE
+    {"_POSIX_VDISABLE", _POSIX_VDISABLE},
+#endif
 
     /* sentinel */
     {NULL, 0}