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gdm/0002-daemon-Support-X-servers-built-with-Dlisten_tcp-true.patch
Ray Strode 7c05e20e13 - More fixes from RHEL 8: 
- Fix DisallowTCP=false
  - Fix crash when both wayland and xorg are unavailable
  Related: #2056931
2022-02-22 13:56:59 -05:00

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From cc67c8de39358031fddc5ca7d8c993271d6606a7 Mon Sep 17 00:00:00 2001
From: Alan Coopersmith <alan.coopersmith@oracle.com>
Date: Thu, 7 Oct 2021 18:22:11 -0700
Subject: [PATCH 2/2] daemon: Support X servers built with -Dlisten_tcp=true
Xorg since version 1.17 doesn't listen to tcp sockets by default
unless it's explicitly built with -Dlisten_tcp=true.
GDM currently assumes X servers 1.17 and later are always built
without specifying -Dlisten_tcp=true and doesn't work properly
otherwise.
This commit enhances GDM to better handle these non-standard builds by
always passing '-nolisten tcp' on the command line when tcp should
be disabled, and likewise always passing '-listen tcp' on the command
line, assuming the X server is new enough to support it, when tcp
should be enabled.
Related #704
---
daemon/gdm-server.c | 21 +++++++++++----------
daemon/gdm-x-session.c | 12 ++++++------
meson.build | 4 ++--
3 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/daemon/gdm-server.c b/daemon/gdm-server.c
index 1ba00d45..e5d23521 100644
--- a/daemon/gdm-server.c
+++ b/daemon/gdm-server.c
@@ -290,72 +290,73 @@ gdm_server_resolve_command_line (GdmServer *server,
if (strcmp (arg, "-query") == 0 ||
strcmp (arg, "-indirect") == 0)
query_in_arglist = TRUE;
}
argv = g_renew (char *, argv, len + 12);
/* shift args down one */
for (i = len - 1; i >= 1; i--) {
argv[i+1] = argv[i];
}
/* server number is the FIRST argument, before any others */
argv[1] = g_strdup (server->display_name);
len++;
if (server->auth_file != NULL) {
argv[len++] = g_strdup ("-auth");
argv[len++] = g_strdup (server->auth_file);
}
if (server->display_seat_id != NULL) {
argv[len++] = g_strdup ("-seat");
argv[len++] = g_strdup (server->display_seat_id);
}
/* If we were compiled with Xserver >= 1.17 we need to specify
* '-listen tcp' as the X server dosen't listen on tcp sockets
* by default anymore. In older versions we need to pass
* -nolisten tcp to disable listening on tcp sockets.
*/
-#ifdef HAVE_XSERVER_THAT_DEFAULTS_TO_LOCAL_ONLY
- if (!server->disable_tcp && ! query_in_arglist) {
- argv[len++] = g_strdup ("-listen");
- argv[len++] = g_strdup ("tcp");
- }
-#else
- if (server->disable_tcp && ! query_in_arglist) {
- argv[len++] = g_strdup ("-nolisten");
- argv[len++] = g_strdup ("tcp");
- }
+ if (!query_in_arglist) {
+ if (server->disable_tcp) {
+ argv[len++] = g_strdup ("-nolisten");
+ argv[len++] = g_strdup ("tcp");
+ }
+#ifdef HAVE_XSERVER_WITH_LISTEN
+ if (!server->disable_tcp) {
+ argv[len++] = g_strdup ("-listen");
+ argv[len++] = g_strdup ("tcp");
+ }
#endif
+ }
if (vtarg != NULL && ! gotvtarg) {
argv[len++] = g_strdup (vtarg);
}
argv[len++] = NULL;
*argvp = argv;
*argcp = len;
return TRUE;
}
static void
rotate_logs (const char *path,
guint n_copies)
{
int i;
for (i = n_copies - 1; i > 0; i--) {
char *name_n;
char *name_n1;
name_n = g_strdup_printf ("%s.%d", path, i);
if (i > 1) {
name_n1 = g_strdup_printf ("%s.%d", path, i - 1);
} else {
name_n1 = g_strdup (path);
}
diff --git a/daemon/gdm-x-session.c b/daemon/gdm-x-session.c
index 5962da57..0b07ab5b 100644
--- a/daemon/gdm-x-session.c
+++ b/daemon/gdm-x-session.c
@@ -233,70 +233,70 @@ spawn_x_server (State *state,
if (g_getenv ("XDG_VTNR") != NULL) {
int vt;
vt = atoi (g_getenv ("XDG_VTNR"));
if (vt > 0 && vt < 64) {
vt_string = g_strdup_printf ("vt%d", vt);
}
}
display_fd_string = g_strdup_printf ("%d", DISPLAY_FILENO);
g_ptr_array_add (arguments, X_SERVER);
if (vt_string != NULL) {
g_ptr_array_add (arguments, vt_string);
}
g_ptr_array_add (arguments, "-displayfd");
g_ptr_array_add (arguments, display_fd_string);
g_ptr_array_add (arguments, "-auth");
g_ptr_array_add (arguments, auth_file);
/* If we were compiled with Xserver >= 1.17 we need to specify
* '-listen tcp' as the X server doesn't listen on tcp sockets
* by default anymore. In older versions we need to pass
* -nolisten tcp to disable listening on tcp sockets.
*/
-#ifdef HAVE_XSERVER_THAT_DEFAULTS_TO_LOCAL_ONLY
- if (allow_remote_connections) {
- g_ptr_array_add (arguments, "-listen");
- g_ptr_array_add (arguments, "tcp");
- }
-#else
if (!allow_remote_connections) {
g_ptr_array_add (arguments, "-nolisten");
g_ptr_array_add (arguments, "tcp");
}
+
+#ifdef HAVE_XSERVER_WITH_LISTEN
+ if (allow_remote_connections) {
+ g_ptr_array_add (arguments, "-listen");
+ g_ptr_array_add (arguments, "tcp");
+ }
#endif
g_ptr_array_add (arguments, "-background");
g_ptr_array_add (arguments, "none");
g_ptr_array_add (arguments, "-noreset");
g_ptr_array_add (arguments, "-keeptty");
g_ptr_array_add (arguments, "-novtswitch");
g_ptr_array_add (arguments, "-verbose");
if (state->debug_enabled) {
g_ptr_array_add (arguments, "7");
} else {
g_ptr_array_add (arguments, "3");
}
if (state->debug_enabled) {
g_ptr_array_add (arguments, "-core");
}
g_ptr_array_add (arguments, NULL);
subprocess = g_subprocess_launcher_spawnv (launcher,
(const char * const *) arguments->pdata,
&error);
g_free (display_fd_string);
g_clear_object (&launcher);
g_ptr_array_free (arguments, TRUE);
if (subprocess == NULL) {
g_debug ("could not start X server: %s", error->message);
diff --git a/meson.build b/meson.build
index 52ac1941..02d609dc 100644
--- a/meson.build
+++ b/meson.build
@@ -44,61 +44,61 @@ glib_min_version = '2.56.0'
glib_dep = dependency('glib-2.0', version: '>=' + glib_min_version)
gobject_dep = dependency('gobject-2.0', version: '>=' + glib_min_version)
gio_dep = dependency('gio-2.0', version: '>=' + glib_min_version)
gio_unix_dep = dependency('gio-unix-2.0', version: '>=' + glib_min_version)
gtk_dep = dependency('gtk+-3.0', version: '>= 2.91.1')
libcanberra_gtk_dep = dependency('libcanberra-gtk3', version: '>= 0.4')
accountsservice_dep = dependency('accountsservice', version: '>= 0.6.35')
xcb_dep = dependency('xcb')
keyutils_dep = dependency('libkeyutils', required: false)
libselinux_dep = dependency('libselinux', required: get_option('selinux'))
# udev
if udev_dir == ''
if udev_dep.found()
udev_prefix = udev_dep.get_pkgconfig_variable('udevdir')
else
udev_prefix = gdm_prefix / 'lib' / 'udev'
endif
udev_dir = udev_prefix / 'rules.d'
endif
# X11
x_deps = declare_dependency(
dependencies: [
dependency('x11'),
dependency('xau'),
],
)
# Xserver 1.17 & later default to -nolisten and require -listen for remote access
xserver_deps = dependency('xorg-server', version : '>=1.17', required : false)
-xserver_nolisten_default = xserver_deps.found()
+xserver_has_listen = xserver_deps.found()
find_x_server_script = find_program('build-aux/find-x-server.sh', native: true)
find_x_server_out = run_command(find_x_server_script).stdout().strip()
if find_x_server_out != ''
x_bin = find_x_server_out
x_bin_path_split = x_bin.split('/')
i = 0
x_path = '/'
foreach dir : x_bin_path_split
if i < x_bin_path_split.length() - 1
x_path = x_path / dir
endif
i = i + 1
endforeach
else
# what to do, what to do, this is wrong, but this just sets the
# defaults, perhaps this user is cross compiling or some such
x_path = '/usr/bin/X11:/usr/X11R6/bin:/opt/X11R6/bin'
x_bin = '/usr/bin/X'
endif
xdmcp_dep = cc.find_library('Xdmcp', required: get_option('xdmcp'))
if xdmcp_dep.found() and get_option('tcp-wrappers')
libwrap_dep = cc.find_library('wrap')
endif
# systemd
systemd_dep = dependency('systemd')
libsystemd_dep = dependency('libsystemd')
if meson.version().version_compare('>= 0.53')
systemd_multiseat_x = find_program('systemd-multi-seat-x',
required: false,
dirs: [
@@ -200,61 +200,61 @@ conf.set_quoted('SYSCONFDIR', gdm_prefix / get_option('sysconfdir'))
conf.set_quoted('BINDIR', gdm_prefix / get_option('bindir'))
conf.set_quoted('LIBDIR', gdm_prefix / get_option('libdir'))
conf.set_quoted('LIBEXECDIR', gdm_prefix / get_option('libexecdir'))
conf.set_quoted('LOGDIR', get_option('log-dir'))
conf.set_quoted('DMCONFDIR', dmconfdir)
conf.set_quoted('GDMCONFDIR', gdmconfdir)
conf.set_quoted('GDM_SCREENSHOT_DIR', gdm_screenshot_dir)
conf.set_quoted('GDM_XAUTH_DIR', gdm_xauth_dir)
conf.set_quoted('GDM_RAN_ONCE_MARKER_DIR', ran_once_marker_dir)
conf.set_quoted('GDM_RUN_DIR', gdm_run_dir)
conf.set_quoted('GNOMELOCALEDIR', gdm_prefix / get_option('localedir'))
conf.set_quoted('AT_SPI_REGISTRYD_DIR', at_spi_registryd_dir)
conf.set_quoted('GDM_PID_FILE', gdm_pid_file)
conf.set_quoted('GNOME_SETTINGS_DAEMON_DIR', gnome_settings_daemon_dir)
conf.set_quoted('LANG_CONFIG_FILE', lang_config_file)
conf.set('HAVE_ADT', have_adt)
conf.set('HAVE_UTMP_H', have_utmp_header)
conf.set('HAVE_UTMPX_H', have_utmpx_header)
conf.set('HAVE_POSIX_GETPWNAM_R', have_posix_getpwnam_r)
conf.set('UTMP', utmp_struct)
conf.set('HAVE_GETUTXENT', cc.has_function('getutxent'))
conf.set('HAVE_UPDWTMP', cc.has_function('updwtmp'))
conf.set('HAVE_UPDWTMPX', cc.has_function('updwtmpx'))
conf.set('HAVE_LOGIN', cc.has_function('login', args: '-lutil'))
conf.set('HAVE_LOGOUT', cc.has_function('logout', args: '-lutil'))
conf.set('HAVE_LOGWTMP', cc.has_function('logwtmp', args: '-lutil'))
conf.set('HAVE_PAM_SYSLOG', have_pam_syslog)
conf.set('HAVE_KEYUTILS', keyutils_dep.found())
conf.set('SUPPORTS_PAM_EXTENSIONS', pam_extensions_supported)
conf.set('HAVE_SELINUX', libselinux_dep.found())
-conf.set('HAVE_XSERVER_THAT_DEFAULTS_TO_LOCAL_ONLY', xserver_nolisten_default)
+conf.set('HAVE_XSERVER_WITH_LISTEN', xserver_has_listen)
conf.set('ENABLE_USER_DISPLAY_SERVER', get_option('user-display-server'))
conf.set('ENABLE_SYSTEMD_JOURNAL', get_option('systemd-journal'))
conf.set('ENABLE_WAYLAND_SUPPORT', get_option('wayland-support'))
conf.set('ENABLE_PROFILING', get_option('profiling'))
conf.set('GDM_INITIAL_VT', get_option('initial-vt'))
conf.set_quoted('GDM_DEFAULTS_CONF', gdm_defaults_conf)
conf.set_quoted('GDM_CUSTOM_CONF', gdm_custom_conf)
conf.set_quoted('GDM_RUNTIME_CONF', gdm_runtime_conf)
conf.set_quoted('GDM_SESSION_DEFAULT_PATH', get_option('default-path'))
conf.set_quoted('GDM_USERNAME', get_option('user'))
conf.set_quoted('GDM_GROUPNAME', get_option('group'))
conf.set('HAVE_LIBXDMCP', xdmcp_dep.found())
conf.set_quoted('SYSTEMD_X_SERVER', systemd_x_server)
conf.set('WITH_PLYMOUTH', plymouth_dep.found())
conf.set_quoted('X_SERVER', x_bin)
conf.set_quoted('X_PATH', x_path)
conf.set('HAVE_UT_UT_HOST', utmp_has_host_field)
conf.set('HAVE_UT_UT_PID', utmp_has_pid_field)
conf.set('HAVE_UT_UT_ID', utmp_has_id_field)
conf.set('HAVE_UT_UT_NAME', utmp_has_name_field)
conf.set('HAVE_UT_UT_TYPE', utmp_has_type_field)
conf.set('HAVE_UT_UT_EXIT_E_TERMINATION', utmp_has_exit_e_termination_field)
conf.set('HAVE_UT_UT_USER', utmp_has_user_field)
conf.set('HAVE_UT_UT_TIME', utmp_has_time_field)
conf.set('HAVE_UT_UT_TV', utmp_has_tv_field)
conf.set('HAVE_UT_UT_SYSLEN', utmp_has_syslen_field)
conf.set('ENABLE_IPV6', get_option('ipv6'))
configure_file(output: 'config.h', configuration: conf)
# Subdirs
--
2.34.1
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