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
|
/* libnih
*
* dbus_message.c - D-Bus message handling
*
* Copyright © 2009 Scott James Remnant <scott@netsplit.com>.
* Copyright © 2009 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <dbus/dbus.h>
#include <nih/macros.h>
#include <nih/alloc.h>
#include <nih/string.h>
#include <nih/logging.h>
#include "dbus_message.h"
/* Prototypes for static functions */
static int nih_dbus_message_destroy (NihDBusMessage *msg);
/**
* nih_dbus_message_new:
* @parent: parent object for new message,
* @connection: D-Bus connection to associate with,
* @message: D-Bus message to encapulsate.
*
* Creates a new D-Bus message object allocated using nih_alloc(). This
* encapsulates both an underlying D-Bus connection and message received
* on it, referencing both.
*
* Objects of this structure are passed to method implementation functions
* so the original message information may be extracted; if the function
* is asynchronous, you should take a reference to this structure and pass
* it when sending the reply or an error.
*
* When the message is freed, the references to the connection and message
* will be dropped, which may disconnect the connection.
*
* If @parent is not NULL, it should be a pointer to another object which
* will be used as a parent for the returned object. When all parents
* of the returned object are freed, the returned object will also be
* freed.
*
* Returns: new NihDBusMessage structure, or NULL if insufficient memory.
**/
NihDBusMessage *
nih_dbus_message_new (const void * parent,
DBusConnection *connection,
DBusMessage * message)
{
NihDBusMessage *msg;
nih_assert (connection != NULL);
nih_assert (message != NULL);
msg = nih_new (parent, NihDBusMessage);
if (! msg)
return NULL;
msg->connection = connection;
dbus_connection_ref (msg->connection);
msg->message = message;
dbus_message_ref (msg->message);
nih_alloc_set_destructor (msg, nih_dbus_message_destroy);
return msg;
}
/**
* nih_dbus_message_destroy:
* @msg: message to be destroyed.
*
* Unreferences the attached D-Bus message and connection.
*
* Returns: zero
**/
static int
nih_dbus_message_destroy (NihDBusMessage *msg)
{
nih_assert (msg != NULL);
dbus_message_unref (msg->message);
dbus_connection_unref (msg->connection);
return 0;
}
/**
* nih_dbus_message_error:
* @msg: message to reply to,
* @name: name of D-Bus error to reply with,
* @format: format string for human-readable message.
*
* Replies to an asynchronous D-Bus message @msg with the D-Bus error
* @name with a human-readable message parsed according to @format.
*
* Returns: zero on success, negative value on insufficient memory.
**/
int
nih_dbus_message_error (NihDBusMessage *msg,
const char * name,
const char * format,
...)
{
DBusMessage * message;
va_list args;
nih_local char *str = NULL;
nih_assert (msg != NULL);
nih_assert (name != NULL);
nih_assert (format != NULL);
/* Create the message string */
va_start (args, format);
str = nih_vsprintf (NULL, format, args);
va_end (args);
if (! str)
return -1;
/* And the reply */
message = dbus_message_new_error (msg->message, name, str);
if (! message)
return -1;
/* Send the error back to the connection the original message
* was received from.
*/
if (! dbus_connection_send (msg->connection, message, NULL)) {
dbus_message_unref (message);
return -1;
}
dbus_message_unref (message);
return 0;
}
|
