kernel: transition devpts in kernel

kernel/selinux/selinux.c

@@ -129,4 +129,17 @@ bool is_zygote(void *sec)
 	result = strncmp("u:r:zygote:s0", domain, seclen) == 0;
 	security_release_secctx(domain, seclen);
 	return result;
+}
+
+#define DEVPTS_DOMAIN "u:object_r:devpts:s0"
+
+u32 ksu_get_devpts_sid()
+{
+	u32 devpts_sid = 0;
+	int err = security_secctx_to_secid(DEVPTS_DOMAIN, strlen(DEVPTS_DOMAIN),
+					   &devpts_sid);
+	if (err) {
+		pr_info("get devpts sid err %d\n", err);
+	}
+	return devpts_sid;
 }

kernel/selinux/selinux.h

@@ -20,4 +20,6 @@ bool is_zygote(void *cred);
 
 void apply_kernelsu_rules();
 
+u32 ksu_get_devpts_sid();
+
 #endif