From 238c43b2ca24038424446ce54413d276cf9bd009 Mon Sep 17 00:00:00 2001
From: utam0k <k0ma@utam0k.jp>
Date: Sun, 11 Sep 2022 09:47:58 +0900
Subject: [PATCH] Implement to set a domain name

---
 libcontainer/standard_init_linux.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libcontainer/standard_init_linux.go b/libcontainer/standard_init_linux.go
index 6ad25c9a4df..4b84974ec6b 100644
--- a/libcontainer/standard_init_linux.go
+++ b/libcontainer/standard_init_linux.go
@@ -126,6 +126,11 @@ func (l *linuxStandardInit) Init() error {
 			return &os.SyscallError{Syscall: "sethostname", Err: err}
 		}
 	}
+	if domainname := l.config.Config.Domainname; domainname != "" {
+		if err := unix.Setdomainname([]byte(domainname)); err != nil {
+			return &os.SyscallError{Syscall: "setdomainname", Err: err}
+		}
+	}
 	if err := apparmor.ApplyProfile(l.config.AppArmorProfile); err != nil {
 		return fmt.Errorf("unable to apply apparmor profile: %w", err)
 	}