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File gdm-add-runtime-option-to-disable-starting-X-server-as-u.patch of Package gdm (Revision db8f6f2c00413a0fcf4da88ba8aec110)

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From a19b51ad9e446948ba60c359641f6c4c14fec1da Mon Sep 17 00:00:00 2001
From: Michal Srb <msrb@suse.com>
Date: Fri, 26 Jan 2018 10:49:18 +0100
Subject: [PATCH] Add runtime option to disable starting X server as user

If the environmental variable GDM_DISABLE_USER_DISPLAY_SERVER is defined, the
X server will be started under root. The same way as if gdm was built with
--disable-user-display-server option.

This allows system to run X server under root if and only-if necessary.
---
diff -urp gdm-3.32.0.orig/daemon/gdm-local-display-factory.c gdm-3.32.0/daemon/gdm-local-display-factory.c
--- gdm-3.32.0.orig/daemon/gdm-local-display-factory.c	2019-03-05 09:10:56.000000000 -0600
+++ gdm-3.32.0/daemon/gdm-local-display-factory.c	2019-03-19 11:31:18.093838985 -0500
@@ -231,11 +231,12 @@ gdm_local_display_factory_create_transie
 
         g_debug ("GdmLocalDisplayFactory: Creating transient display");
 
-#ifdef ENABLE_USER_DISPLAY_SERVER
-        display = gdm_local_display_new ();
-        if (gdm_local_display_factory_use_wayland ())
-                g_object_set (G_OBJECT (display), "session-type", "wayland", NULL);
-#else
+        if (getenv ("GDM_DISABLE_USER_DISPLAY_SERVER") == NULL) {
+                display = gdm_local_display_new ();
+                if (gdm_local_display_factory_use_wayland ())
+                        g_object_set (G_OBJECT (display), "session-type", "wayland", NULL);
+        }
+
         if (display == NULL) {
                 guint32 num;
 
@@ -243,7 +244,6 @@ gdm_local_display_factory_create_transie
 
                 display = gdm_legacy_display_new (num);
         }
-#endif
 
         g_object_set (display,
                       "seat-id", "seat0",
@@ -468,7 +468,7 @@ create_display (GdmLocalDisplayFactory *
         g_debug ("GdmLocalDisplayFactory: Adding display on seat %s", seat_id);
 
 #ifdef ENABLE_USER_DISPLAY_SERVER
-        if (g_strcmp0 (seat_id, "seat0") == 0) {
+        if (getenv ("GDM_DISABLE_USER_DISPLAY_SERVER") == NULL && g_strcmp0 (seat_id, "seat0") == 0) {
                 display = gdm_local_display_new ();
                 if (session_type != NULL) {
                         g_object_set (G_OBJECT (display), "session-type", session_type, NULL);
diff -urp gdm-3.32.0.orig/daemon/gdm-session.c gdm-3.32.0/daemon/gdm-session.c
--- gdm-3.32.0.orig/daemon/gdm-session.c	2019-03-05 09:10:56.000000000 -0600
+++ gdm-3.32.0/daemon/gdm-session.c	2019-03-19 10:42:39.493665629 -0500
@@ -371,7 +371,11 @@ get_system_session_dirs (GdmSession *sel
 #ifdef ENABLE_WAYLAND_SUPPORT
         if (!self->ignore_wayland) {
 #ifdef ENABLE_USER_DISPLAY_SERVER
-                g_array_prepend_val (search_array, wayland_search_dir);
+                if (getenv ("GDM_DISABLE_USER_DISPLAY_SERVER") == NULL) {
+                        g_array_prepend_val (search_array, wayland_search_dir);
+                } else {
+                        g_array_append_val (search_array, wayland_search_dir);
+                }
 
                 for (i = 0; system_data_dirs[i]; i++) {
                         gchar *dir = g_build_filename (system_data_dirs[i], "wayland-sessions", NULL);
@@ -3258,8 +3262,10 @@ gdm_session_get_display_mode (GdmSession
          *   right now.  It will die with an error if logind devices
          *   are paused when handed out.
          */
-        return GDM_SESSION_DISPLAY_MODE_NEW_VT;
-#else
+        if (getenv ("GDM_DISABLE_USER_DISPLAY_SERVER") == NULL) {
+                return GDM_SESSION_DISPLAY_MODE_NEW_VT;
+        }
+#endif
 
 #ifdef ENABLE_WAYLAND_SUPPORT
         /* Wayland sessions are for now assumed to run in a
@@ -3270,7 +3276,6 @@ gdm_session_get_display_mode (GdmSession
         }
 #endif
         return GDM_SESSION_DISPLAY_MODE_REUSE_VT;
-#endif
 }
 
 void

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File gdm-add-runtime-option-to-disable-starting-X-server-as-u.patch of Package gdm (Revision db8f6f2c00413a0fcf4da88ba8aec110)

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