From 70c19ccf16a0f8ef2d0ef8ef44f69dd72aa210b1 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Sat, 4 Nov 2023 13:46:29 +0900
Subject: [PATCH] Fix CTRL-Z handling: Signal SIGSTOP to PGID

Fix #3501
---
 src/terminal_unix.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/terminal_unix.go b/src/terminal_unix.go
index 4cee73b..1ce7854 100644
--- a/src/terminal_unix.go
+++ b/src/terminal_unix.go
@@ -7,6 +7,8 @@ import (
 	"os/signal"
 	"strings"
 	"syscall"
+
+	"golang.org/x/sys/unix"
 )
 
 func notifyOnResize(resizeChan chan<- os.Signal) {
@@ -14,7 +16,12 @@ func notifyOnResize(resizeChan chan<- os.Signal) {
 }
 
 func notifyStop(p *os.Process) {
-	p.Signal(syscall.SIGSTOP)
+	pid := p.Pid
+	pgid, err := unix.Getpgid(pid)
+	if err == nil {
+		pid = pgid * -1
+	}
+	unix.Kill(pid, syscall.SIGSTOP)
 }
 
 func notifyOnCont(resizeChan chan<- os.Signal) {