From 41882edd0421d7f611bcec8cba9379ac8bfa24a9 Mon Sep 17 00:00:00 2001
From: Olivier Brunel <jjk@jjacky.com>
Date: Fri, 20 Sep 2013 22:18:28 +0200
Subject: [PATCH] Resolve /dev/console to the active tty instead of just "tty0"

When resolving /dev/console one would often get "tty0" meaning the active VT.
Resolving to the actual tty (e.g. "tty1") will notably help on boot when
determining whether or not PID1 can output to the console.
---
 src/shared/util.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/shared/util.c b/src/shared/util.c
index b1a4006..8a542da 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -3627,6 +3627,16 @@ char *resolve_dev_console(char **active) {
         else
                 tty = *active;
 
+        if (streq(tty, "tty0")) {
+                char *tmp;
+
+                /* Get the active VC (e.g. tty1) */
+                if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) {
+                        free(*active);
+                        tty = *active = tmp;
+                }
+        }
+
         return tty;
 }