From 05972668d14ac0b4fb3410f7a9d0cef3ab2a89d6 Mon Sep 17 00:00:00 2001
From: AnotherTest <ali.mpfard@gmail.com>
Date: Thu, 6 Aug 2020 03:22:06 +0430
Subject: [PATCH] Kernel: Send a SIGCHLD to the parent upon suspension of a
 process

...that is controlling a TTY.
---
 Kernel/TTY/TTY.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Kernel/TTY/TTY.cpp b/Kernel/TTY/TTY.cpp
index 1743bf86d2..bc9ff14ff3 100644
--- a/Kernel/TTY/TTY.cpp
+++ b/Kernel/TTY/TTY.cpp
@@ -155,6 +155,10 @@ void TTY::emit(u8 ch)
         if (ch == m_termios.c_cc[VSUSP]) {
             dbg() << tty_name() << ": VSUSP pressed!";
             generate_signal(SIGTSTP);
+            if (auto process = Process::from_pid(m_pgid)) {
+                if (auto parent = Process::from_pid(process->ppid()))
+                    (void)parent->send_signal(SIGCHLD, process);
+            }
             return;
         }
     }
@@ -390,5 +394,4 @@ void TTY::hang_up()
 {
     generate_signal(SIGHUP);
 }
-
 }