[glib: 1/2] gtimezone: Fallback to /etc/timezone on Gentoo

[Philip Withnall <pwithnall src gnome org>]

commit 2ceb48dfc28f619b1bfe6037e5799ec9d0a0ab31
Author: Mart Raudsepp <leio gentoo org>
Date:   Mon Dec 17 00:42:39 2018 +0200

    gtimezone: Fallback to /etc/timezone on Gentoo
    
    On non-systemd Gentoo systems the chosen timezone is expressed in
    /etc/timezone and /etc/localtime may be a copy of the timezone
    file instead of symlink. Add this path to the fallback test to
    not regress dates into UTC.

 glib/gtimezone.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)
---
diff --git a/glib/gtimezone.c b/glib/gtimezone.c
index df40d852d..3d38b17bf 100644
--- a/glib/gtimezone.c
+++ b/glib/gtimezone.c
@@ -449,12 +449,17 @@ zone_info_unix (const gchar  *identifier,
                                                     G_FILE_ERROR_INVAL);
           g_clear_error (&read_link_err);
 
-          /* Fallback to the content of /var/db/zoneinfo if /etc/localtime is
-           * not a symlink. This is where 'tzsetup' program on FreeBSD and
-           * DragonflyBSD stores the timezone chosen by the user. */
-          if (not_a_symlink && g_file_get_contents ("/var/db/zoneinfo",
-                                                    &resolved_identifier,
-                                                    NULL, NULL))
+          /* Fallback to the content of /var/db/zoneinfo or /etc/timezone
+           * if /etc/localtime is not a symlink. /var/db/zoneinfo is
+           * where 'tzsetup' program on FreeBSD and DragonflyBSD stores
+           * the timezone chosen by the user. /etc/timezone is where user
+           * choice is expressed on Gentoo OpenRC and others. */
+          if (not_a_symlink && (g_file_get_contents ("/var/db/zoneinfo",
+                                                     &resolved_identifier,
+                                                     NULL, NULL) ||
+                                g_file_get_contents ("/etc/timezone",
+                                                     &resolved_identifier,
+                                                     NULL, NULL)))
             g_strchomp (resolved_identifier);
           else
             {