From e14c56bd902726a577053309eff24941602f26fe Mon Sep 17 00:00:00 2001
From: Xu Meng <mengxumx@cn.ibm.com>
Date: Mon, 16 Dec 2019 15:26:54 +0100
Subject: [PATCH] ibmi: fix the false isatty() issue on IBMi

On IBMi PASE isatty() always returns true for stdin, stdout and stderr.
Use ioctl() instead to identify whether it's actually a TTY.

PR-URL: https://github.com/libuv/libuv/pull/2565
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
---
 src/unix/tty.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/unix/tty.c b/src/unix/tty.c
index e7c520f7..2385911c 100644
--- a/src/unix/tty.c
+++ b/src/unix/tty.c
@@ -293,7 +293,14 @@ uv_handle_type uv_guess_handle(uv_file file) {
   if (file < 0)
     return UV_UNKNOWN_HANDLE;
 
+#if defined(__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(file, TXISATTY + 0x81, NULL) || errno != ENOTTY)
+#else
   if (isatty(file))
+#endif
     return UV_TTY;
 
   if (fstat(file, &s))