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From 4ac2d88f3153d8cdaa003601363e71f46820a187 Mon Sep 17 00:00:00 2001
From: Patrick J. Volkerding <volkerdi@slackware.com>
Date: Tue, 20 Nov 2018 13:26:57 -0600
Subject: [PATCH] Also look at /etc/localtime-copied-from

In Slackware, /etc/localtime is a copy of the local timezone file, not a
symlink to it, but the latest glib expects a symlink (because that's been
demanded by systemd and guess-who). So, if we find that /etc/localtime is
not a symlink, consider /etc/localtime-copied-from next. On Slackware
systems this will be a symlink to the local timezone file under
/usr/share/zoneinfo. We still want to consider the possibility that
/etc/localtime *is* a symlink first though, since that's an acceptable
local system modification on Slackware.

--- ./glib/gtimezone.c.orig	2018-09-21 09:23:53.000000000 -0500
+++ ./glib/gtimezone.c	2018-11-20 13:11:31.601643410 -0600
@@ -440,6 +440,20 @@
 
       /* Resolve the actual timezone pointed to by /etc/localtime. */
       resolved_identifier = g_file_read_link (filename, &read_link_err);
+
+      /* If we didn't get the timezone here (probably because
+       * /etc/localtime is not a symlink), then we will try again using
+       * /etc/localtime-copied-from, which on Slackware is a symlink to
+       * the local timezone file. */
+      if (resolved_identifier == NULL)
+        {
+          filename = g_strdup ("/etc/localtime-copied-from");
+          g_clear_error (&read_link_err);
+          resolved_identifier = g_file_read_link (filename, &read_link_err);
+        }
+
+      /* Test that we got the resolved_identifier. If not, fall back on the
+       * last option (/var/db/zoneinfo file, as found on FreeBSD) */
       if (resolved_identifier == NULL)
         {
           gboolean not_a_symlink = g_error_matches (read_link_err,