From 55e540f7ab6adb3ea0de16912dfde8e0bf94cc6e Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Tue, 20 Sep 2022 11:12:11 +0900
Subject: Ignore EPERM which means already being process-leader

---
 process.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'process.c')

diff --git a/process.c b/process.c
index a3d3bcbb78..735dd2d855 100644
--- a/process.c
+++ b/process.c
@@ -7115,7 +7115,8 @@ rb_daemon(int nochdir, int noclose)
       default: _exit(EXIT_SUCCESS);
     }
 
-    if (setsid() < 0) return -1;
+    /* ignore EPERM which means already being process-leader */
+    if (setsid() < 0) (void)0;
 
     if (!nochdir)
         err = chdir("/");
-- 
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