From 1d075cfd7f9bc0085d98d3512b84314f02b6b1dc Mon Sep 17 00:00:00 2001
From: cjihrig <cjihrig@gmail.com>
Date: Sun, 12 Jan 2020 18:52:41 -0500
Subject: [PATCH] src: use uv_guess_handle() to detect TTYs

This commit reverts https://github.com/nodejs/node/pull/30829
and uses uv_guess_handle() instead of isatty(). The IBMi
changes are no longer required, as of libuv 1.34.1.

PR-URL: https://github.com/nodejs/node/pull/31333
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
---
 src/node.cc | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/src/node.cc b/src/node.cc
index 5b9fff1dd34a14..5118feed602a93 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -98,9 +98,6 @@
 #include <unistd.h>        // STDIN_FILENO, STDERR_FILENO
 #endif
 
-#ifdef __PASE__
-#include <sys/ioctl.h>  // ioctl
-#endif
 // ========== global C++ headers ==========
 
 #include <cerrno>
@@ -555,14 +552,7 @@ inline void PlatformInit() {
     while (s.flags == -1 && errno == EINTR);  // NOLINT
     CHECK_NE(s.flags, -1);
 
-#ifdef __PASE__
-    // On IBMi PASE isatty() always returns true for stdin, stdout and stderr.
-    // Use ioctl() instead to identify whether it's actually a TTY.
-    if (ioctl(fd, TXISATTY + 0x81, nullptr) == -1 && errno == ENOTTY)
-      continue;
-#else
-    if (!isatty(fd)) continue;
-#endif
+    if (uv_guess_handle(fd) != UV_TTY) continue;
     s.isatty = true;
 
     do