2 * Copyright (C) 2010-2011 Robert Ancell.
3 * Author: Robert Ancell <robert.ancell@canonical.com>
5 * This program is free software: you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License as published by the Free Software
7 * Foundation, either version 3 of the License, or (at your option) any later
8 * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
17 #include <glib/gstdio.h>
19 #include "x-server-xvnc.h"
20 #include "configuration.h"
21 #include "x-server-local.h"
24 struct XServerXVNCPrivate
26 /* X server process */
27 Process *x_server_process;
29 /* Command to run the X server */
32 /* Display number to use */
36 gchar *authority_file;
38 /* File descriptor to use for standard input */
41 /* Geometry and colour depth */
42 gint width, height, depth;
44 /* TRUE when received ready signal */
48 G_DEFINE_TYPE (XServerXVNC, x_server_xvnc, X_SERVER_TYPE);
51 x_server_xvnc_new (void)
53 XServerXVNC *self = g_object_new (X_SERVER_XVNC_TYPE, NULL);
56 name = g_strdup_printf ("xvnc-%d", x_server_get_display_number (X_SERVER (self)));
57 display_server_set_name (DISPLAY_SERVER (self), name);
64 x_server_xvnc_set_command (XServerXVNC *server, const gchar *command)
66 g_return_if_fail (server != NULL);
67 g_free (server->priv->command);
68 server->priv->command = g_strdup (command);
72 x_server_xvnc_set_socket (XServerXVNC *server, int fd)
74 g_return_if_fail (server != NULL);
75 server->priv->socket_fd = fd;
79 x_server_xvnc_get_socket (XServerXVNC *server)
81 g_return_val_if_fail (server != NULL, 0);
82 return server->priv->socket_fd;
86 x_server_xvnc_set_geometry (XServerXVNC *server, gint width, gint height)
88 g_return_if_fail (server != NULL);
89 server->priv->width = width;
90 server->priv->height = height;
94 x_server_xvnc_set_depth (XServerXVNC *server, gint depth)
96 g_return_if_fail (server != NULL);
97 server->priv->depth = depth;
101 x_server_xvnc_get_authority_file_path (XServerXVNC *server)
103 g_return_val_if_fail (server != NULL, 0);
104 return server->priv->authority_file;
108 x_server_xvnc_get_display_number (XServer *server)
110 return X_SERVER_XVNC (server)->priv->display_number;
114 get_absolute_command (const gchar *command)
117 gchar *absolute_binary, *absolute_command = NULL;
119 tokens = g_strsplit (command, " ", 2);
121 absolute_binary = g_find_program_in_path (tokens[0]);
125 absolute_command = g_strjoin (" ", absolute_binary, tokens[1], NULL);
127 absolute_command = g_strdup (absolute_binary);
132 return absolute_command;
136 run_cb (Process *process, gpointer user_data)
138 XServerXVNC *server = user_data;
141 dup2 (server->priv->socket_fd, STDIN_FILENO);
142 dup2 (server->priv->socket_fd, STDOUT_FILENO);
143 close (server->priv->socket_fd);
145 /* Set SIGUSR1 to ignore so the X server can indicate it when it is ready */
146 signal (SIGUSR1, SIG_IGN);
150 got_signal_cb (Process *process, int signum, XServerXVNC *server)
152 if (signum == SIGUSR1 && !server->priv->got_signal)
154 server->priv->got_signal = TRUE;
155 l_debug (server, "Got signal from Xvnc server :%d", x_server_get_display_number (X_SERVER (server)));
157 // FIXME: Check return value
158 DISPLAY_SERVER_CLASS (x_server_xvnc_parent_class)->start (DISPLAY_SERVER (server));
163 stopped_cb (Process *process, XServerXVNC *server)
165 l_debug (server, "Xvnc server stopped");
167 g_clear_object (&server->priv->x_server_process);
169 x_server_local_release_display_number (x_server_get_display_number (X_SERVER (server)));
171 l_debug (server, "Removing X server authority %s", server->priv->authority_file);
173 g_unlink (server->priv->authority_file);
174 g_free (server->priv->authority_file);
175 server->priv->authority_file = NULL;
177 DISPLAY_SERVER_CLASS (x_server_xvnc_parent_class)->stop (DISPLAY_SERVER (server));
181 x_server_xvnc_get_can_share (DisplayServer *server)
187 x_server_xvnc_start (DisplayServer *display_server)
189 XServerXVNC *server = X_SERVER_XVNC (display_server);
190 XAuthority *authority;
191 gboolean result, backup_logs;
192 gchar *filename, *run_dir, *dir, *log_file, *absolute_command;
195 GError *error = NULL;
197 g_return_val_if_fail (server->priv->x_server_process == NULL, FALSE);
199 server->priv->got_signal = FALSE;
201 server->priv->x_server_process = process_new (run_cb, server);
202 process_set_clear_environment (server->priv->x_server_process, TRUE);
203 g_signal_connect (server->priv->x_server_process, PROCESS_SIGNAL_GOT_SIGNAL, G_CALLBACK (got_signal_cb), server);
204 g_signal_connect (server->priv->x_server_process, PROCESS_SIGNAL_STOPPED, G_CALLBACK (stopped_cb), server);
207 filename = g_strdup_printf ("%s.log", display_server_get_name (display_server));
208 dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
209 log_file = g_build_filename (dir, filename, NULL);
210 backup_logs = config_get_boolean (config_get_instance (), "LightDM", "backup-logs");
211 process_set_log_file (server->priv->x_server_process, log_file, FALSE, backup_logs ? LOG_MODE_BACKUP_AND_TRUNCATE : LOG_MODE_APPEND);
212 l_debug (display_server, "Logging to %s", log_file);
217 absolute_command = get_absolute_command (server->priv->command);
218 if (!absolute_command)
220 l_debug (display_server, "Can't launch X server %s, not found in path", server->priv->command);
221 stopped_cb (server->priv->x_server_process, X_SERVER_XVNC (server));
225 number = g_strdup_printf ("%d", x_server_get_display_number (X_SERVER (server)));
226 authority = x_authority_new_local_cookie (number);
228 x_server_set_authority (X_SERVER (server), authority);
230 run_dir = config_get_string (config_get_instance (), "LightDM", "run-directory");
231 dir = g_build_filename (run_dir, "root", NULL);
233 if (g_mkdir_with_parents (dir, S_IRWXU) < 0)
234 l_warning (display_server, "Failed to make authority directory %s: %s", dir, strerror (errno));
236 server->priv->authority_file = g_build_filename (dir, x_server_get_address (X_SERVER (server)), NULL);
239 l_debug (display_server, "Writing X server authority to %s", server->priv->authority_file);
241 x_authority_write (authority, XAUTH_WRITE_MODE_REPLACE, server->priv->authority_file, &error);
243 l_warning (display_server, "Failed to write authority: %s", error->message);
244 g_clear_error (&error);
246 command = g_string_new (absolute_command);
247 g_free (absolute_command);
249 g_string_append_printf (command, " :%d", x_server_get_display_number (X_SERVER (server)));
250 g_string_append_printf (command, " -auth %s", server->priv->authority_file);
251 g_string_append (command, " -inetd -nolisten tcp");
252 if (server->priv->width > 0 && server->priv->height > 0)
253 g_string_append_printf (command, " -geometry %dx%d", server->priv->width, server->priv->height);
254 if (server->priv->depth > 0)
255 g_string_append_printf (command, " -depth %d", server->priv->depth);
257 process_set_command (server->priv->x_server_process, command->str);
258 g_string_free (command, TRUE);
260 l_debug (display_server, "Launching Xvnc server");
262 /* Variable required for regression tests */
263 if (g_getenv ("LIGHTDM_TEST_ROOT"))
265 process_set_env (server->priv->x_server_process, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
266 process_set_env (server->priv->x_server_process, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
269 result = process_start (server->priv->x_server_process, FALSE);
272 l_debug (display_server, "Waiting for ready signal from Xvnc server :%d", x_server_get_display_number (X_SERVER (server)));
275 stopped_cb (server->priv->x_server_process, X_SERVER_XVNC (server));
281 x_server_xvnc_stop (DisplayServer *server)
283 process_stop (X_SERVER_XVNC (server)->priv->x_server_process);
287 x_server_xvnc_init (XServerXVNC *server)
289 server->priv = G_TYPE_INSTANCE_GET_PRIVATE (server, X_SERVER_XVNC_TYPE, XServerXVNCPrivate);
290 server->priv->command = g_strdup ("Xvnc");
291 server->priv->display_number = x_server_local_get_unused_display_number ();
292 server->priv->width = 1024;
293 server->priv->height = 768;
294 server->priv->depth = 8;
298 x_server_xvnc_finalize (GObject *object)
300 XServerXVNC *self = X_SERVER_XVNC (object);
302 g_clear_object (&self->priv->x_server_process);
303 g_free (self->priv->command);
304 g_free (self->priv->authority_file);
306 G_OBJECT_CLASS (x_server_xvnc_parent_class)->finalize (object);
310 x_server_xvnc_class_init (XServerXVNCClass *klass)
312 GObjectClass *object_class = G_OBJECT_CLASS (klass);
313 XServerClass *x_server_class = X_SERVER_CLASS (klass);
314 DisplayServerClass *display_server_class = DISPLAY_SERVER_CLASS (klass);
316 x_server_class->get_display_number = x_server_xvnc_get_display_number;
317 display_server_class->get_can_share = x_server_xvnc_get_can_share;
318 display_server_class->start = x_server_xvnc_start;
319 display_server_class->stop = x_server_xvnc_stop;
320 object_class->finalize = x_server_xvnc_finalize;
322 g_type_class_add_private (klass, sizeof (XServerXVNCPrivate));