From 86d92c17c4ad9ff12d550680208c0eae98dd776b Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Wed, 15 May 2024 00:28:56 +0900
Subject: [PATCH] Refactor tui.TtyIn()

---
 src/terminal.go         | 10 ----------
 src/tui/light_unix.go   |  8 ++++++++
 src/tui/ttyname_unix.go | 13 +++----------
 3 files changed, 11 insertions(+), 20 deletions(-)

diff --git a/src/terminal.go b/src/terminal.go
index bdbc6bb..5179b0c 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -3471,16 +3471,6 @@ func (t *Terminal) Loop() error {
 					if t.history != nil {
 						t.history.append(string(t.input))
 					}
-
-					/*
-					 FIXME: It is not at all clear why this is required.
-					 The following command will report 'not a tty', unless we open
-					 /dev/tty *twice* after closing the standard input for 'reload'
-					 in Reader.terminate().
-
-					   while : | fzf --bind 'start:reload:ls' --bind 'load:become:tty'; do echo; done
-					*/
-					tui.TtyIn()
 					t.executor.Become(tui.TtyIn(), t.environ(), command)
 				}
 			case actExecute, actExecuteSilent:
diff --git a/src/tui/light_unix.go b/src/tui/light_unix.go
index e59c72e..8d5a279 100644
--- a/src/tui/light_unix.go
+++ b/src/tui/light_unix.go
@@ -7,6 +7,7 @@ import (
 	"os"
 	"os/exec"
 	"strings"
+	"sync"
 	"syscall"
 
 	"github.com/junegunn/fzf/src/util"
@@ -18,6 +19,7 @@ var (
 	tty    string
 	ttyin  *os.File
 	ttyout *os.File
+	mutex  sync.Mutex
 )
 
 func IsLightRendererSupported() bool {
@@ -71,6 +73,9 @@ func openTty(mode int) (*os.File, error) {
 }
 
 func openTtyIn() (*os.File, error) {
+	mutex.Lock()
+	defer mutex.Unlock()
+
 	if ttyin != nil {
 		return ttyin, nil
 	}
@@ -82,6 +87,9 @@ func openTtyIn() (*os.File, error) {
 }
 
 func openTtyOut() (*os.File, error) {
+	mutex.Lock()
+	defer mutex.Unlock()
+
 	if ttyout != nil {
 		return ttyout, nil
 	}
diff --git a/src/tui/ttyname_unix.go b/src/tui/ttyname_unix.go
index bc6fe96..384115f 100644
--- a/src/tui/ttyname_unix.go
+++ b/src/tui/ttyname_unix.go
@@ -36,15 +36,8 @@ func ttyname() string {
 
 // TtyIn returns terminal device to be used as STDIN, falls back to os.Stdin
 func TtyIn() *os.File {
-	in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
-	if err != nil {
-		tty := ttyname()
-		if len(tty) > 0 {
-			if in, err := os.OpenFile(tty, syscall.O_RDONLY, 0); err == nil {
-				return in
-			}
-		}
-		return os.Stdin
+	if in, err := openTtyIn(); err == nil {
+		return in
 	}
-	return in
+	return os.Stdin
 }