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source: vbox/trunk/src/VBox/Additions/linux/lightdm-greeter/liblightdm-gobject-1.5.0/session.c

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1/*
2 * Copyright (C) 2010 Robert Ancell.
3 * Author: Robert Ancell <[email protected]>
4 *
5 * This library is free software; you can redistribute it and/or modify it under
6 * the terms of the GNU Lesser General Public License as published by the Free
7 * Software Foundation; either version 2 or version 3 of the License.
8 * See http://www.gnu.org/copyleft/lgpl.html the full text of the license.
9 */
10
11/*
12 * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
13 * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
14 * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
15 * a choice of LGPL license versions is made available with the language indicating
16 * that LGPLv2 or any later version may be used, or where a choice of which version
17 * of the LGPL is applied is otherwise unspecified.
18 */
19
20#include <string.h>
21#include <gio/gdesktopappinfo.h>
22
23#include "lightdm/session.h"
24
25enum {
26 PROP_0,
27 PROP_KEY,
28 PROP_NAME,
29 PROP_COMMENT
30};
31
32typedef struct
33{
34 gchar *key;
35 gchar *name;
36 gchar *comment;
37} LightDMSessionPrivate;
38
39G_DEFINE_TYPE (LightDMSession, lightdm_session, G_TYPE_OBJECT);
40
41#define GET_PRIVATE(obj) G_TYPE_INSTANCE_GET_PRIVATE ((obj), LIGHTDM_TYPE_SESSION, LightDMSessionPrivate)
42
43static gboolean have_sessions = FALSE;
44static GList *local_sessions = NULL;
45static GList *remote_sessions = NULL;
46
47static gint
48compare_session (gconstpointer a, gconstpointer b)
49{
50 LightDMSessionPrivate *priv_a = GET_PRIVATE (a);
51 LightDMSessionPrivate *priv_b = GET_PRIVATE (b);
52 return strcmp (priv_a->name, priv_b->name);
53}
54
55static LightDMSession *
56load_session (GKeyFile *key_file, const gchar *key)
57{
58 gchar *domain, *name;
59 LightDMSession *session;
60 LightDMSessionPrivate *priv;
61 gchar *try_exec;
62
63 if (g_key_file_get_boolean (key_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_NO_DISPLAY, NULL) ||
64 g_key_file_get_boolean (key_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_HIDDEN, NULL))
65 return NULL;
66
67#ifdef G_KEY_FILE_DESKTOP_KEY_GETTEXT_DOMAIN
68 domain = g_key_file_get_string (key_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_GETTEXT_DOMAIN, NULL);
69#else
70 domain = g_key_file_get_string (key_file, G_KEY_FILE_DESKTOP_GROUP, "X-GNOME-Gettext-Domain", NULL);
71#endif
72 name = g_key_file_get_locale_string (key_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_NAME, domain, NULL);
73 if (!name)
74 {
75 g_warning ("Ignoring session without name");
76 g_free (domain);
77 return NULL;
78 }
79
80 try_exec = g_key_file_get_locale_string (key_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_TRY_EXEC, domain, NULL);
81 if (try_exec)
82 {
83 gchar *full_path;
84
85 full_path = g_find_program_in_path (try_exec);
86 g_free (try_exec);
87
88 if (!full_path)
89 {
90 g_free (name);
91 g_free (domain);
92 return NULL;
93 }
94 g_free (full_path);
95 }
96
97 session = g_object_new (LIGHTDM_TYPE_SESSION, NULL);
98 priv = GET_PRIVATE (session);
99
100 g_free (priv->key);
101 priv->key = g_strdup (key);
102
103 g_free (priv->name);
104 priv->name = name;
105
106 g_free (priv->comment);
107 priv->comment = g_key_file_get_locale_string (key_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_COMMENT, domain, NULL);
108 if (!priv->comment)
109 priv->comment = g_strdup ("");
110
111 g_free (domain);
112
113 return session;
114}
115
116static GList *
117load_sessions (const gchar *sessions_dir)
118{
119 GDir *directory;
120 GList *sessions = NULL;
121 GError *error = NULL;
122
123 directory = g_dir_open (sessions_dir, 0, &error);
124 if (error)
125 g_warning ("Failed to open sessions directory: %s", error->message);
126 g_clear_error (&error);
127 if (!directory)
128 return NULL;
129
130 while (TRUE)
131 {
132 const gchar *filename;
133 gchar *path;
134 GKeyFile *key_file;
135 gboolean result;
136
137 filename = g_dir_read_name (directory);
138 if (filename == NULL)
139 break;
140
141 if (!g_str_has_suffix (filename, ".desktop"))
142 continue;
143
144 path = g_build_filename (sessions_dir, filename, NULL);
145
146 key_file = g_key_file_new ();
147 result = g_key_file_load_from_file (key_file, path, G_KEY_FILE_NONE, &error);
148 if (error)
149 g_warning ("Failed to load session file %s: %s:", path, error->message);
150 g_clear_error (&error);
151
152 if (result)
153 {
154 gchar *key;
155 LightDMSession *session;
156
157 key = g_strndup (filename, strlen (filename) - strlen (".desktop"));
158 session = load_session (key_file, key);
159 if (session)
160 {
161 g_debug ("Loaded session %s (%s, %s)", path, GET_PRIVATE (session)->name, GET_PRIVATE (session)->comment);
162 sessions = g_list_insert_sorted (sessions, session, compare_session);
163 }
164 else
165 g_debug ("Ignoring session %s", path);
166 g_free (key);
167 }
168
169 g_free (path);
170 g_key_file_free (key_file);
171 }
172
173 g_dir_close (directory);
174
175 return sessions;
176}
177
178static void
179update_sessions (void)
180{
181 GKeyFile *config_key_file = NULL;
182 gchar *config_path = NULL;
183 gchar *xsessions_dir;
184 gchar *remote_sessions_dir;
185 gboolean result;
186 GError *error = NULL;
187
188 if (have_sessions)
189 return;
190
191 xsessions_dir = g_strdup (XSESSIONS_DIR);
192 remote_sessions_dir = g_strdup (REMOTE_SESSIONS_DIR);
193
194 /* Use session directory from configuration */
195 /* FIXME: This should be sent in the greeter connection */
196 config_path = g_build_filename (CONFIG_DIR, "lightdm.conf", NULL);
197 config_key_file = g_key_file_new ();
198 result = g_key_file_load_from_file (config_key_file, config_path, G_KEY_FILE_NONE, &error);
199 if (error)
200 g_warning ("Failed to open configuration file: %s", error->message);
201 g_clear_error (&error);
202 if (result)
203 {
204 gchar *value;
205
206 value = g_key_file_get_string (config_key_file, "LightDM", "xsessions-directory", NULL);
207 if (value)
208 {
209 g_free (xsessions_dir);
210 xsessions_dir = value;
211 }
212
213 value = g_key_file_get_string (config_key_file, "LightDM", "remote-sessions-directory", NULL);
214 if (value)
215 {
216 g_free (remote_sessions_dir);
217 remote_sessions_dir = value;
218 }
219 }
220 g_key_file_free (config_key_file);
221 g_free (config_path);
222
223 local_sessions = load_sessions (xsessions_dir);
224 remote_sessions = load_sessions (remote_sessions_dir);
225
226 g_free (xsessions_dir);
227 g_free (remote_sessions_dir);
228
229 have_sessions = TRUE;
230}
231
232/**
233 * lightdm_get_sessions:
234 *
235 * Get the available sessions.
236 *
237 * Return value: (element-type LightDMSession) (transfer none): A list of #LightDMSession
238 **/
239GList *
240lightdm_get_sessions (void)
241{
242 update_sessions ();
243 return local_sessions;
244}
245
246/**
247 * lightdm_get_remote_sessions:
248 *
249 * Get the available remote sessions.
250 *
251 * Return value: (element-type LightDMSession) (transfer none): A list of #LightDMSession
252 **/
253GList *
254lightdm_get_remote_sessions (void)
255{
256 update_sessions ();
257 return remote_sessions;
258}
259
260/**
261 * lightdm_session_get_key:
262 * @session: A #LightDMSession
263 *
264 * Get the key for a session
265 *
266 * Return value: The session key
267 **/
268const gchar *
269lightdm_session_get_key (LightDMSession *session)
270{
271 g_return_val_if_fail (LIGHTDM_IS_SESSION (session), NULL);
272 return GET_PRIVATE (session)->key;
273}
274
275/**
276 * lightdm_session_get_name:
277 * @session: A #LightDMSession
278 *
279 * Get the name for a session
280 *
281 * Return value: The session name
282 **/
283const gchar *
284lightdm_session_get_name (LightDMSession *session)
285{
286 g_return_val_if_fail (LIGHTDM_IS_SESSION (session), NULL);
287 return GET_PRIVATE (session)->name;
288}
289
290/**
291 * lightdm_session_get_comment:
292 * @session: A #LightDMSession
293 *
294 * Get the comment for a session
295 *
296 * Return value: The session comment
297 **/
298const gchar *
299lightdm_session_get_comment (LightDMSession *session)
300{
301 g_return_val_if_fail (LIGHTDM_IS_SESSION (session), NULL);
302 return GET_PRIVATE (session)->comment;
303}
304
305static void
306lightdm_session_init (LightDMSession *session)
307{
308}
309
310static void
311lightdm_session_set_property (GObject *object,
312 guint prop_id,
313 const GValue *value,
314 GParamSpec *pspec)
315{
316 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
317}
318
319static void
320lightdm_session_get_property (GObject *object,
321 guint prop_id,
322 GValue *value,
323 GParamSpec *pspec)
324{
325 LightDMSession *self;
326
327 self = LIGHTDM_SESSION (object);
328
329 switch (prop_id) {
330 case PROP_KEY:
331 g_value_set_string (value, lightdm_session_get_key (self));
332 break;
333 case PROP_NAME:
334 g_value_set_string (value, lightdm_session_get_name (self));
335 break;
336 case PROP_COMMENT:
337 g_value_set_string (value, lightdm_session_get_comment (self));
338 break;
339 default:
340 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
341 break;
342 }
343}
344
345static void
346lightdm_session_finalize (GObject *object)
347{
348 LightDMSession *self = LIGHTDM_SESSION (object);
349 LightDMSessionPrivate *priv = GET_PRIVATE (self);
350
351 g_free (priv->key);
352 g_free (priv->name);
353 g_free (priv->comment);
354}
355
356static void
357lightdm_session_class_init (LightDMSessionClass *klass)
358{
359 GObjectClass *object_class = G_OBJECT_CLASS (klass);
360
361 g_type_class_add_private (klass, sizeof (LightDMSessionPrivate));
362
363 object_class->set_property = lightdm_session_set_property;
364 object_class->get_property = lightdm_session_get_property;
365 object_class->finalize = lightdm_session_finalize;
366
367 g_object_class_install_property (object_class,
368 PROP_KEY,
369 g_param_spec_string ("key",
370 "key",
371 "Session key",
372 NULL,
373 G_PARAM_READABLE));
374 g_object_class_install_property (object_class,
375 PROP_NAME,
376 g_param_spec_string ("name",
377 "name",
378 "Session name",
379 NULL,
380 G_PARAM_READABLE));
381 g_object_class_install_property (object_class,
382 PROP_COMMENT,
383 g_param_spec_string ("comment",
384 "comment",
385 "Session comment",
386 NULL,
387 G_PARAM_READABLE));
388}
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