1 /* GIO - GLib Input, Output and Streaming Library
2 *
3 * Copyright (C) 2006-2007 Red Hat, Inc.
4 * Copyright (C) 2007 Sebastian Dröge.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General
17 * Public License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
19 * Boston, MA 02111-1307, USA.
20 *
21 * Authors: Alexander Larsson <alexl@redhat.com>
22 * John McCutchan <john@johnmccutchan.com>
23 * Sebastian Dröge <slomo@circular-chaos.org>
24 */
25
26 #include "config.h"
27
28 #include "ginotifyfilemonitor.h"
29 #include <gio/giomodule.h>
30
31 #define USE_INOTIFY 1
32 #include "inotify-helper.h"
33
34 #include "gioalias.h"
35
36 struct _GInotifyFileMonitor
37 {
38 GLocalFileMonitor parent_instance;
39 gchar *filename;
40 gchar *dirname;
41 inotify_sub *sub;
42 };
43
44 static gboolean g_inotify_file_monitor_cancel (GFileMonitor* monitor);
45
46 #define g_inotify_file_monitor_get_type _g_inotify_file_monitor_get_type
47 G_DEFINE_TYPE_WITH_CODE (GInotifyFileMonitor, g_inotify_file_monitor, G_TYPE_LOCAL_FILE_MONITOR,
48 g_io_extension_point_implement (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME,
49 g_define_type_id,
50 "inotify",
51 20))
52
53 static void
g_inotify_file_monitor_finalize(GObject * object)54 g_inotify_file_monitor_finalize (GObject *object)
55 {
56 GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (object);
57 inotify_sub *sub = inotify_monitor->sub;
58
59 if (sub)
60 {
61 _ih_sub_cancel (sub);
62 _ih_sub_free (sub);
63 inotify_monitor->sub = NULL;
64 }
65
66 if (inotify_monitor->filename)
67 {
68 g_free (inotify_monitor->filename);
69 inotify_monitor->filename = NULL;
70 }
71
72 if (inotify_monitor->dirname)
73 {
74 g_free (inotify_monitor->dirname);
75 inotify_monitor->dirname = NULL;
76 }
77
78 if (G_OBJECT_CLASS (g_inotify_file_monitor_parent_class)->finalize)
79 (*G_OBJECT_CLASS (g_inotify_file_monitor_parent_class)->finalize) (object);
80 }
81
82 static GObject *
g_inotify_file_monitor_constructor(GType type,guint n_construct_properties,GObjectConstructParam * construct_properties)83 g_inotify_file_monitor_constructor (GType type,
84 guint n_construct_properties,
85 GObjectConstructParam *construct_properties)
86 {
87 GObject *obj;
88 GInotifyFileMonitorClass *klass;
89 GObjectClass *parent_class;
90 GInotifyFileMonitor *inotify_monitor;
91 const gchar *filename = NULL;
92 inotify_sub *sub = NULL;
93
94 klass = G_INOTIFY_FILE_MONITOR_CLASS (g_type_class_peek (G_TYPE_INOTIFY_FILE_MONITOR));
95 parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (klass));
96 obj = parent_class->constructor (type,
97 n_construct_properties,
98 construct_properties);
99
100 inotify_monitor = G_INOTIFY_FILE_MONITOR (obj);
101
102 filename = G_LOCAL_FILE_MONITOR (obj)->filename;
103
104 g_assert (filename != NULL);
105
106 inotify_monitor->filename = g_path_get_basename (filename);
107 inotify_monitor->dirname = g_path_get_dirname (filename);
108
109 /* Will never fail as is_supported() should be called before instanciating
110 * anyway */
111 g_assert (_ih_startup ());
112
113 sub = _ih_sub_new (inotify_monitor->dirname, inotify_monitor->filename, inotify_monitor);
114
115 /* FIXME: what to do about errors here? we can't return NULL or another
116 * kind of error and an assertion is probably too hard */
117 g_assert (sub != NULL);
118 g_assert (_ih_sub_add (sub));
119
120 inotify_monitor->sub = sub;
121
122 return obj;
123 }
124
125 static gboolean
g_inotify_file_monitor_is_supported(void)126 g_inotify_file_monitor_is_supported (void)
127 {
128 return _ih_startup ();
129 }
130
131 static void
g_inotify_file_monitor_class_init(GInotifyFileMonitorClass * klass)132 g_inotify_file_monitor_class_init (GInotifyFileMonitorClass* klass)
133 {
134 GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
135 GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
136 GLocalFileMonitorClass *local_file_monitor_class = G_LOCAL_FILE_MONITOR_CLASS (klass);
137
138 gobject_class->finalize = g_inotify_file_monitor_finalize;
139 gobject_class->constructor = g_inotify_file_monitor_constructor;
140 file_monitor_class->cancel = g_inotify_file_monitor_cancel;
141
142 local_file_monitor_class->is_supported = g_inotify_file_monitor_is_supported;
143 }
144
145 static void
g_inotify_file_monitor_init(GInotifyFileMonitor * monitor)146 g_inotify_file_monitor_init (GInotifyFileMonitor* monitor)
147 {
148 }
149
150 static gboolean
g_inotify_file_monitor_cancel(GFileMonitor * monitor)151 g_inotify_file_monitor_cancel (GFileMonitor* monitor)
152 {
153 GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (monitor);
154 inotify_sub *sub = inotify_monitor->sub;
155
156 if (sub)
157 {
158 _ih_sub_cancel (sub);
159 _ih_sub_free (sub);
160 inotify_monitor->sub = NULL;
161 }
162
163 if (G_FILE_MONITOR_CLASS (g_inotify_file_monitor_parent_class)->cancel)
164 (*G_FILE_MONITOR_CLASS (g_inotify_file_monitor_parent_class)->cancel) (monitor);
165
166 return TRUE;
167 }
168
169