qemu: Add credentials to qemu Cmd

add credentials to the command attribute

Fixes #2444

Signed-off-by: Feng Wang <feng.wang@databricks.com>

qemu/qemu.go

@@ -2439,6 +2439,13 @@ type Config struct {
 	// Ctx is the context used when launching qemu.
 	Ctx context.Context
 
+	// User ID.
+	Uid uint32
+	// Group ID.
+	Gid uint32
+	// Supplementary group IDs.
+	Groups []uint32
+
 	// Name is the qemu guest name
 	Name string
 
@@ -2898,8 +2905,15 @@ func LaunchQemu(config Config, logger QMPLog) (string, error) {
 		ctx = context.Background()
 	}
 
+	attr := syscall.SysProcAttr{}
+	attr.Credential = &syscall.Credential{
+		Uid:    config.Uid,
+		Gid:    config.Gid,
+		Groups: config.Groups,
+	}
+
 	return LaunchCustomQemu(ctx, config.Path, config.qemuParams,
-		config.fds, nil, logger)
+		config.fds, &attr, logger)
 }
 
 // LaunchCustomQemu can be used to launch a new qemu instance.