From 4ac01d86b1946c718787bf6a057a5d0a7e646adf Mon Sep 17 00:00:00 2001
From: Wei Mingzhi <whistler@member.fsf.org>
Date: Tue, 13 Jan 2026 19:10:05 +0800
Subject: [PATCH] fix: explicitly specify signal numbers for process group
 compatibility

Always include -15 (SIGTERM) or -9 (SIGKILL) to ensure negative PIDs
are correctly handled as process group IDs
---
 index.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/index.js b/index.js
index 8c85c74..425ddab 100644
--- a/index.js
+++ b/index.js
@@ -151,6 +151,8 @@ const defaultKill = (input, options) => {
 
 	if (options.force) {
 		arguments_.unshift('-9');
+	} else {
+		arguments_.unshift('-15');
 	}
 
 	if (killByName && options.ignoreCase) {