Revert "rc: make get_systype similar to the old rc_sys function"

This reverts commit f79a7a7be1.

src/rc/rc.c

@@ -281,8 +281,12 @@ open_shell(void)
 	struct passwd *pw;
 
 #ifdef __linux__
-	char *sys = get_systype();
+	const char *sys = NULL;
 	
+	sys = detect_container();
+	if (!sys)
+		sys = detect_vm();
+
 	/* VSERVER and OPENVZ systems cannot really drop to shells */
 	if (sys &&
 	    (strcmp(sys, "VSERVER") == 0 || strcmp(sys, "OPENVZ") == 0))
@@ -466,7 +470,7 @@ static void
 do_sysinit()
 {
 	struct utsname uts;
-	char *sys = get_systype();
+	const char *sys;
 
 	/* exec init-early.sh if it exists
 	 * This should just setup the console to use the correct
@@ -487,6 +491,9 @@ do_sysinit()
 	    uts.machine);
 #endif
 
+	sys = detect_container();
+	if (!sys)
+		sys = detect_vm();
 	if (sys)
 		printf(" [%s]", sys);
 
@@ -502,7 +509,9 @@ do_sysinit()
 
 	/* init may have mounted /proc so we can now detect or real
 	 * sys */
-	sys = get_systype();
+	sys = detect_container();
+	if (!sys)
+		sys = detect_vm();
 	if (sys)
 		setenv("RC_SYS", sys, 1);
 }
@@ -823,7 +832,9 @@ int main(int argc, char **argv)
 			eerrorx("%s: %s", applet, strerror(errno));
 			/* NOTREACHED */
 		case 'S':
-			systype = get_systype();
+			systype = detect_container();
+			if (!systype)
+				systype = detect_vm();
 			if (systype)
 				printf("%s\n", systype);
 			exit(EXIT_SUCCESS);