From 418593def3022a9a89bfbc503bbbe877b3757910 Mon Sep 17 00:00:00 2001
From: Vitaly Potyarkin <sio.wtf@gmail.com>
Date: Fri, 28 Apr 2023 10:09:56 +0000
Subject: [PATCH] Restore support for older Go versions

When compiled with go older than 1.12 creack/pty will not include a fix
for blocking Read() and will be prone to data races - but at least it will work

For more information see issues: #88 #114 #156 #162
---
 io_test.go      |  3 +++
 ioctl.go        |  5 ++---
 ioctl_legacy.go | 10 ++++++++++
 3 files changed, 15 insertions(+), 3 deletions(-)
 create mode 100644 ioctl_legacy.go

diff --git a/io_test.go b/io_test.go
index f68956c..57fbd3d 100644
--- a/io_test.go
+++ b/io_test.go
@@ -1,3 +1,6 @@
+//go:build go1.12
+// +build go1.12
+
 package pty
 
 import (
diff --git a/ioctl.go b/ioctl.go
index 4e26755..60ac9b8 100644
--- a/ioctl.go
+++ b/ioctl.go
@@ -1,7 +1,6 @@
-//go:build !windows
-// +build !windows
+//go:build !windows && go1.12
+// +build !windows,go1.12
 
-//
 package pty
 
 import "os"
diff --git a/ioctl_legacy.go b/ioctl_legacy.go
new file mode 100644
index 0000000..f00b1a1
--- /dev/null
+++ b/ioctl_legacy.go
@@ -0,0 +1,10 @@
+//go:build !windows && !go1.12
+// +build !windows,!go1.12
+
+package pty
+
+import "os"
+
+func ioctl(f *os.File, cmd, ptr uintptr) error {
+	return ioctl_inner(f.Fd(), cmd, ptr) // fall back to blocking io (old behavior)
+}