openvpn-script: Print errors to syslog instead of stderr
[platform/upstream/connman.git] / scripts / openvpn-script.c
1 /*
2  *
3  *  Connection Manager
4  *
5  *  Copyright (C) 2007-2012  Intel Corporation. All rights reserved.
6  *  Copyright (C) 2010  BMW Car IT GmbH. All rights reserved.
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License version 2 as
10  *  published by the Free Software Foundation.
11  *
12  *  This program is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *  GNU General Public License for more details.
16  *
17  *  You should have received a copy of the GNU General Public License
18  *  along with this program; if not, write to the Free Software
19  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
20  *
21  */
22
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <syslog.h>
31 #include <libgen.h>
32
33 #include <dbus/dbus.h>
34
35 extern char **environ;
36
37 static void print(const char *format, ...)
38 {
39         va_list ap;
40
41         va_start(ap, format);
42         vsyslog(LOG_INFO, format, ap);
43         va_end(ap);
44 }
45
46
47 static void append(DBusMessageIter *dict, const char *pattern)
48 {
49         DBusMessageIter entry;
50         const char *key, *value;
51         char *delim;
52
53         delim = strchr(pattern, '=');
54         *delim = '\0';
55
56         key = pattern;
57         value = delim + 1;
58
59         dbus_message_iter_open_container(dict, DBUS_TYPE_DICT_ENTRY,
60                                                         NULL, &entry);
61
62         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
63
64         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &value);
65
66         dbus_message_iter_close_container(dict, &entry);
67 }
68
69 int main(int argc, char *argv[])
70 {
71         DBusConnection *conn;
72         DBusError error;
73         DBusMessage *msg;
74         DBusMessageIter iter, dict;
75         char **envp, *busname, *interface, *path, *reason;
76         int ret = 0;
77
78         openlog(basename(argv[0]), LOG_NDELAY | LOG_PID, LOG_DAEMON);
79
80         busname = getenv("CONNMAN_BUSNAME");
81         interface = getenv("CONNMAN_INTERFACE");
82         path = getenv("CONNMAN_PATH");
83
84         reason = getenv("script_type");
85
86         if (!busname || !interface || !path || !reason) {
87                 print("Required environment variables not set");
88                 ret = 1;
89                 goto out;
90         }
91         dbus_error_init(&error);
92
93         conn = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
94         if (conn == NULL) {
95                 if (dbus_error_is_set(&error) == TRUE) {
96                         print("%s", error.message);
97                         dbus_error_free(&error);
98                 } else
99                         print("Failed to get on system bus");
100
101                 goto out;
102         }
103
104         msg = dbus_message_new_method_call(busname, path,
105                                                 interface, "notify");
106         if (msg == NULL) {
107                 dbus_connection_unref(conn);
108                 print("Failed to allocate method call");
109                 goto out;
110         }
111
112         dbus_message_set_no_reply(msg, TRUE);
113
114         dbus_message_append_args(msg,
115                                  DBUS_TYPE_STRING, &reason,
116                                  DBUS_TYPE_INVALID);
117
118         dbus_message_iter_init_append(msg, &iter);
119
120         dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
121                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
122                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_STRING_AS_STRING
123                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
124
125         for (envp = environ; envp && *envp; envp++)
126                 append(&dict, *envp);
127
128         dbus_message_iter_close_container(&iter, &dict);
129
130         if (dbus_connection_send(conn, msg, NULL) == FALSE) {
131                 print("Failed to send message");
132                 goto out;
133         }
134
135         dbus_connection_flush(conn);
136
137         dbus_message_unref(msg);
138
139         dbus_connection_unref(conn);
140
141 out:
142         closelog();
143
144         return ret;
145 }