1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* Copyright (c) 2014 Ian Sutton <ian@kremlin.cc>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <unistd.h>
#include <limits.h>
#include <signal.h>
#include <sys/param.h>
#include <string.h>
#include <glib/gprintf.h>
#include <glib-unix.h>
#include "timedated-gen.h"
#include "timedated.h"
GPtrArray *timedated_freeable;
Timedate1 *timedated_interf;
GMainLoop *timedated_loop;
guint bus_descriptor;
gboolean dbus_interface_exported; /* reliable because of gdbus operational guarantees */
/* --- begin method/property/dbus signal code --- */
/*static gboolean
on_handle_set_hostname(Timedate1 *hn1_passed_interf,
GDBusMethodInvocation *invoc,
const gchar *greet,
gpointer data) {
return FALSE;
}*/
/*const gchar *
our_get_hostname() {
gchar *hostname_buf, *ret;
size_t hostname_divider;
hostname_buf = (gchar*) g_malloc0(MAXHOSTNAMELEN);
ret = (gchar*) g_malloc0(MAXHOSTNAMELEN);
g_ptr_array_add(timedated_freeable, hostname_buf);
g_ptr_array_add(timedated_freeable, ret);
if(gethostname(hostname_buf, MAXHOSTNAMELEN))
return "";
hostname_divider = strcspn(hostname_buf, ".");
return strncpy(ret, hostname_buf, hostname_divider);
}*/
/* --- end method/property/dbus signal code, begin bus/name handlers --- */
static void timedated_on_bus_acquired(GDBusConnection *conn,
const gchar *name,
gpointer user_data) {
g_print("got bus/name, exporting %s's interface...\n", name);
timedated_interf = timedate1_skeleton_new();
/* attach function pointers to generated struct's method handlers
g_signal_connect(timedated_interf, "handle-set-hostname", G_CALLBACK(on_handle_set_hostname), NULL);*/
/* set our properties before export
timedate1_set_hostname(timedated_interf, our_get_hostname()); */
if(!g_dbus_interface_skeleton_export(G_DBUS_INTERFACE_SKELETON(timedated_interf),
conn,
"/org/freedesktop/timedate1",
NULL)) {
g_printf("failed to export %s's interface!\n", name);
timedated_mem_clean();
} else {
dbus_interface_exported = TRUE;
g_printf("exported %s's interface on the system bus...\n", name);
}
}
static void timedated_on_name_acquired(GDBusConnection *conn,
const gchar *name,
gpointer user_data) {
g_printf("success!\n");
}
static void timedated_on_name_lost(GDBusConnection *conn,
const gchar *name,
gpointer user_data) {
if(!conn) {
g_printf("failed to connect to the system bus while trying to acquire name '%s': either dbus-daemon isn't running or we don't have permission to push names and/or their interfaces to it.\n", name);
timedated_mem_clean();
}
g_print("lost name %s, exiting...\n", name);
timedated_mem_clean();
}
/* --- end bus/name handlers, begin misc unix functions --- */
/* safe call to clean and then exit
* this stops our GMainLoop safely before letting main() return */
void timedated_mem_clean() {
g_printf("exiting...\n");
if(dbus_interface_exported)
g_dbus_interface_skeleton_unexport(G_DBUS_INTERFACE_SKELETON(timedated_interf));
if(g_main_loop_is_running(timedated_loop))
g_main_loop_quit(timedated_loop);
}
/* wrapper for glib's unix signal handling; called only once if terminating signal is raised against us */
gboolean unix_sig_terminate_handler(gpointer data) {
g_printf("caught SIGINT/HUP/TERM, exiting\n");
timedated_mem_clean();
return G_SOURCE_REMOVE;
}
void set_signal_handlers() {
/* we don't care about its descriptor, we never need to unregister these */
g_unix_signal_add(SIGINT, unix_sig_terminate_handler, NULL);
g_unix_signal_add(SIGHUP, unix_sig_terminate_handler, NULL);
g_unix_signal_add(SIGTERM, unix_sig_terminate_handler, NULL);
}
int main() {
set_signal_handlers();
timedated_loop = g_main_loop_new(NULL, TRUE);
timedated_freeable = g_ptr_array_new();
bus_descriptor = g_bus_own_name(G_BUS_TYPE_SYSTEM,
"org.freedesktop.timedate1",
G_BUS_NAME_OWNER_FLAGS_NONE,
timedated_on_bus_acquired,
timedated_on_name_acquired,
timedated_on_name_lost,
NULL,
NULL);
g_main_loop_run(timedated_loop);
/* runs until single g_main_loop_quit() call is raised inside <interface>_mem_clean() */
g_main_loop_unref(timedated_loop);
/* guaranteed unownable */
g_bus_unown_name(bus_descriptor);
/* at this point no operations can occur with our data, it is safe to free it + its container */
g_ptr_array_free(timedated_freeable, TRUE);
return 0;
}
|
